Update Log for the Vulkan-Docs repository on Github. Updates are in reverse chronological order starting with the latest public release. This summarizes the periodic public updates, not individual commits. For the most part, commits on Github are done as single large patches at the release point, collecting together the resolution of many Khronos internal and public issues. ----------------------------------------------------- Change log for September 5, 2017 Vulkan 1.0.60 spec update: * Bump API patch number and header version number to 60 for this update. Github Issues: * Document that <> can only be meaningfully compared when they are written from the same queue (public issue 216). * Document that the `` tag `type` attribute is required for non-disabled extensions (derived from, but does not close public issue 354). * Clean up registry schema length attribute descriptions to be consistent and correct (public issue 555). Internal Issues: * Replace as much of the hand-written extension appendix metadata as possible with asciidoc includes generated from corresponding attributes of +vk.xml+, and enhance the style guide to match. This avoids inconsistencies between +vk.xml+ and the appendices, and produces a more uniform style (internal issue 137). * Remove the generated extDependency.{py,sh} files from the tree and create them dynamically on demand instead, reducing merge conflicts (internal issue 713). * Add a prototype tool for generating in-place difference markup for sections guarded by asciidoc conditionals, and new syntax for open blocks to support it (internal issue 833). * Remove unnecessary restriction of etext:*SYNC_FD_BIT_KHR external handle types to the same physical device in the slink:VkPhysicalDeviceIDPropertiesKHR, flink:VkImportMemoryWin32HandleInfoKHR, slink:VkImportFenceWin32HandleInfoKHR, slink:VkImportFenceFdInfoKHR, slink:VkImportSemaphoreWin32HandleInfoKHR, slink:VkImportSemaphoreFdInfoKHR <>, <>, and <> sections (internal issue 956). Other Issues: * Remove dependency of +VK_KHX_device_group+ on +VK_KHR_swapchain+ (there is an interaction, but not a strict dependency), and add a new `extension` attribute to the `> (public issue 531). * Rename ename:VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES2_EXT to ename:VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES_2_EXT for consistency, and add an alias for backwards compatibility (public issue 539). Internal Issues: * Add an explanation to the \<\> description explaining that writing to invalid layers results may or may not result in primitives being processed and fragment shaders being run, and gives undefined results in the framebuffer (internal issue 614) * Add valid usage statement for slink:VkDescriptorSetLayoutBinding requiring that input attachment descriptor bindings must not use non-fragment stages (internal issue 933). Other Issues: * Makes description of pname:loadOp and pname:storeOp easier to read in the \<\> section. New Extensions: * `VK_EXT_shader_stencil_export` ----------------------------------------------------- Change log for August 14, 2017 Vulkan 1.0.58 spec update: * Bump API patch number and header version number to 58 for this update. Github Issues: * Update the <> section to allow multiple variables with the same descriptor set/binding decorations, and require that all variables that are statically used must be consistent with the pipeline layout. Allow ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER to be used with texture and sampler variables (public issues 522, 524). Internal Issues: * Replace networkx package used for extension dependency generation with a homegrown network dependency traverser (internal issue 713). * Specify in the <> section that if a fragment shader writes integers that cannot be represented in the format of the colour attachment, then the result is undefined (internal issue 893). * Separate malformed valid usage statement for slink:VkPipelineRasterizationStateCreateInfo into two (internal issue 918). * Fix cases where the term 'pNext chain' is incorrectly used in reference to functions, rather than their parameters. Replace 'pNext list' with 'pNext chain'. Fixed typo in the example code of +VK_KHR_dedicated_allocation+ (internal issue 944). * Fix typo in elink:VkExternalSemaphoreHandleTypeFlagBitsKHR enum descriptions, replacing etext:VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_FENCE_FD_BIT_KHR with ename:VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT_KHR, and make the description more consistent with VK_EXTERNAL_FENCE_HANDLE_TYPE_SYNC_FD_BIT_KHR (internal issue 950). Other Issues: * Clarify how pipeline stage masks affect <>. * Clarify that dedicated allocations do not allow aliasing in the flink:vkBindBufferMemory and flink:vkBindImageMemory valid usage statements. * Correct specification of pname:dynamicCount for push_constant token in slink:VkIndirectCommandsLayoutNVX. New Extensions: * `VK_EXT_shader_viewport_index_layer` ----------------------------------------------------- Change log for August 1, 2017 Vulkan 1.0.57 spec update: * Bump API patch number and header version number to 57 for this update. Github Issues: * Fix error in description of ename:VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK block size (public issue 342). * Update documentation of ename:VK_PIPELINE_CREATE_ALLOW_DERIVATIVES_BIT to explicitly mention both graphics and compute pipelines (public issue 525). Internal Issues: * Document that slink:VkPhysicalDeviceLimits::pname:framebufferColorSampleCounts does not cover integer formats (internal issue 550). * Add a note under slink:VkImageViewCreateInfo describing how values meant for one format can be sanitized when used via another format (internal issue 927). * Add valid usage statements to ftext:vkCmd* documenting that image subresources used as attachments must not be accessed as non-attachments in a render pass (internal issue 929). * Remove obsolete 'validextensionstructs' attribute from +vk.xml+, the XML schema, and the schema documentation (internal issue 946). New Extensions: * `VK_AMD_mixed_attachment_samples` * `VK_EXT_post_depth_coverage` * `VK_KHR_relaxed_block_layout` ----------------------------------------------------- Change log for July 21, 2017 Vulkan 1.0.56 spec update: * Bump API patch number and header version number to 56 for this update. Github Issues: * Add valid usage statements for commands introduced by `VK_EXT_debug_report` and `VK_EXT_debug_marker` extensions, regarding the valid pname:object and pname:objectType values (public issue 495). * Modify `GL_KHR_vulkan_glsl` specification to document that uniform and buffer block arrays each take only a single binding (public issue 514). * Add `KHX` author tag to +vk.xml+ (public issue 526). Internal Issues: * Document use of code: macro for non-Vulkan APIs in the style guide (internal issue 863). * Document that reference page open block delimiters must not contain asciidoc section markup in the style guide (internal issue 898). * Fix <> to say code:VariablePointersStorageBuffer instead of code:VariablePointersUniformBufferBlock (internal issue 928). Other Commits: * Add missing extension structures to dependency attributes in +vk.xml+. New Extenions: * `VK_EXT_depth_range_unrestricted` ----------------------------------------------------- Change log for July 15, 2017 Vulkan 1.0.55 spec update: * Bump API patch number and header version number to 55 for this update. Github Issues: * Removed unintended optional parameter in +vk.xml+ from the pname:pWaitSemaphores member of slink:VkPresentInfoKHR, which resulted in the generation of an incorrect implicit valid usage clause allowing pname:pWaitSemaphores to be NULL even when pname:waitSemaphoreCount is non-zero (public issue 491). * Add missing attribute to +vk.xml+ documenting that slink:VkSwapchainCounterCreateInfoEXT extends slink:VkSwapchainCreateInfo (public issue 510). * Add const qualifier for some `VK_EXT_debug_market` extension command parameters that were missing it (public issue 513). * Fix definition of q and level~base~ in <> (public issue 515). * Clarify lifetime requirement for slink:VkRenderPass objects used in object creation (public issue 516). * Fix link to floating/normalized fixed-point conversion from <> (public issue 521). Internal Issues: * Update the style guide to include the general structure of a Vulkan command name, the specific rule for using "`Get`" vs. "`Enumerate`" in names, and a table of verbs commonly used in command names (spinoff of internal issue 753). * Clarified the behavior of automatic layout transitions in case of attachment views that are 2D or 2D array views of 3D images. In addition, restructured the valid usage clauses corresponding to the members of the slink:VkImageSubresourceRange structure and added missing valid usage clauses for its pname:baseMipLevel and pname:baseArrayLayer members (internal issues 803, 849). * Modify `GL_KHR_vulkan_glsl` specification to allow explicit std430 on a push_constant declaration (internal issue 919). Other Commits: * Modify <> to use synchronization scope terminology. * Add ename:VK_COLOR_SPACE_EXTENDED_SRGB_NONLINEAR_EXT to the `VK_EXT_swapchain_colorspace` extension. * Replace XML comments with `comment` attributes and/or tags, to enable tools which transform the XML without loss of information. * Replace `validextensionstructs` with `structextends`, which is tagged in the child structure instead of the parent. This makes it slightly simpler to add new structs to the XML, causes fewer merge conflicts, and the information is kept localized to the extension structures where it belongs. The old `validextensionstructs` attributes will be retained until we're certain this doesn't cause problems with known consumers of +vk.xml+. ----------------------------------------------------- Change log for July 13, 2017 Vulkan 1.0.54 spec update: * Bump API patch number and header version number to 54 for this update. Github Issues: Internal Issues: * Fix tessellation domain to have an upper-left origin in the <> and related language. CTS and all implementations were already doing this, it was just a documentation bug that it was flipped to lower-left (internal issue 603). * Add a section to the style guide describing how VUID tags are changed and removed when the corresponding Valid Usage statements are modified (internal issue 829). * Add explicit Valid Usage statement to slink:VkPipelineDynamicStateCreateInfo to require that members of pname:pDynamicStates must be unique (internal issue 851). New Extensions: * `VK_KHR_16bit_storage` * `VK_KHR_dedicated_allocation` * `VK_KHR_external_fence` * `VK_KHR_external_fence_capabilities` * `VK_KHR_external_fence_fd` * `VK_KHR_external_fence_win32` * `VK_KHR_get_memory_requirements2` * `VK_KHR_storage_buffer_storage_class` * `VK_KHR_variable_pointers` Extensions Promoted From KHX To KHR Status: * `VK_KHR_external_memory` * `VK_KHR_external_memory_capabilities` * `VK_KHR_external_memory_fd` * `VK_KHR_external_memory_win32` * `VK_KHR_external_semaphore` * `VK_KHR_external_semaphore_capabilities` * `VK_KHR_external_semaphore_fd` * `VK_KHR_external_semaphore_win32` * `VK_KHR_win32_keyed_mutex` ----------------------------------------------------- Change log for June 24, 2017 Vulkan 1.0.53 spec update: * Bump API patch number and header version number to 53 for this update. Github Issues: Internal Issues: * Clarify mappings of coordinates for mutable, compatible image views in slink:VkImageViewCreateInfo (internal issue 815). * Make ename:VK_BIND_SFR_BIT require a logical device with multiple physical devices, so that standard sparse image block dimensions are only required on systems that support multi-GPU (internal issue 835). * Convert all files from use of // refBegin .. // refEnd comments to delimit ref pages, to use of open blocks, and update style guide accordingly (internal issue 839). * Add valid usage for slink:VkWriteDescriptorSet when performing updates to a ename:VK_STORAGE_IMAGE descriptor with layout ename:VK_IMAGE_LAYOUT_GENERAL. * Add a hack to the validity generator script to support an odd interaction between flink:vkCmdFillBuffer and an extension (internal issue 853). * Remove redundant text describing slink:VkBufferCreateInfo::pname:usage, which was already covered by implicit valid usage (internal issue 854). * Update implicit validity generator script to properly handle the pname:sType and pname:pNext members of "returnedonly" structures (internal issue 874). * Note that slink:VkApplicationInfo::pname:pApplicationName & slink:VkApplicationInfo::pname:pEngineName are optional, and add missing implicit valid usage statements for flink:vkDestroyInstance. * Added missing valid usage for flink:vkCmdWriteTimestamp to require a timestamp query pool. * Simplify and/or split "`non-atomic`" valid usage statements. New Extensions: * `VK_AMD_gpu_shader_int16` * `VK_EXT_blend_operation_advanced` * `VK_EXT_sampler_filter_minmax` * `VK_NV_framebuffer_mixed_samples` ----------------------------------------------------- Change log for June 13, 2017 Vulkan 1.0.52 spec update: * Bump API patch number and header version number to 52 for this update. Github Issues: Internal Issues: * Clarify behavior when non-coherent memory has <> (internal issue 819). * Fix description of code:WorkgroupSize builtin to note it decorates an object, not a variable (internal issue 836). * Fix asciidoc attributes so that trailing '{plus}' symbols in [eq] style equations are rendered properly (internal issue 845). * Add language to the "`Extension Handles, Objects, Enums, and Typedefs`" section of the Procedures and Conventions document stating that any new handle type requires a corresponding entry in the elink:VkObjectType enumerated type (internal issue 856). * Update style guide to use slink macro for Vulkan handle type names, and define narrow conditions under which to use the *name and *text macros instead of *link (internal issue 886). * Add a dependency of the <> extension on VK_KHX_device_group_creation to +vk.xml+ and the extension appendix. * Change the copyright on Vulkan specification asciidoc *source* files to CC-BY 4.0, and update the proprietary Khronos copyright applied to the generated *output* formats (internal issue 327). This enables broader re-use and modification of the Vulkan specification sources, while not affecting the Reciprocal IP License between Vulkan Adopters and Working Group Members. New Extensions: * `VK_NV_fill_rectangle` * `VK_NV_fragment_coverage_to_color` ----------------------------------------------------- Change log for June 4, 2017 Vulkan 1.0.51 spec update: * Bump API patch number and header version number to 51 for this update. Github Issues: * Add Valid Usage statement to flink:vkCmdResolveImage to require that source and destination image formats match (public issue 492). * Specify that a code:char* parameter must: be a valid null-terminated string in the <> section (public issue 494). * Removed unnecessary VU for slink:VkPhysicalDeviceFeatures which is covered by ename:VK_ERROR_FEATURE_NOT_PRESENT already (public issue 496). * Clarify valid usage of pname:pQueueFamilyIndices in slink:VkBufferCreateInfo, slink:VkImageCreateInfo, and slink:VkSwapchainCreateInfoKHR (public issue 501). * Document that dependencies of enabled extensions must also be enabled in the <> section (public issue 507). Internal Issues: * Change slink:VkMappedMemoryRange valid usage to allow pname:offset + pname:size == size of the allocation. Also, if ename:VK_WHOLE_SIZE is used, require the end of the mapping to be aligned to a multiple of pname:nonCoherentAtomSize (internal issue 611). * Add issue to `VK_KHR_win32_surface` about reusing window objects from a different graphics API or Vulkan ICD (internal issue 639). * Require locations on user in/out in `GL_KHR_vulkan_glsl` (internal issue 783). * Added version info to the json validation output, and updated the schema to match (internal issue 838). * Restructure enumerated type descriptions separately from the command or structure they are used in, allowing better reference page generation (internal issue 841). * Re-sort extension appendices to be in alphabetical order within each author ID section. * Fix enum naming and clarify behavior for `VK_NVX_device_generated_commands` extension. ----------------------------------------------------- Change log for May 20, 2017 Vulkan 1.0.50 spec update: * Bump API patch number and header version number to 50 for this update. Github Issues: * Fix numerous minor issues with the VK_EXT_debug_report extension (public issues 478, 483, 486, 489, 490). Internal Issues: * Update flink:vkAllocateDescriptorSets to specify conditions under which to return ename:VK_ERROR_FRAGMENTED_POOL or ename:VK_ERROR_OUT_OF_POOL_MEMORY instead of out-of-host/out-of-device-memory, and improve the <> chapter (internal issue 818). * Update validusage target to use more robust code for preprocessing, by making direct use of Asciidoctor's preprocessor. Added uniqueItems check to JSON vu schema and add clean_validusage target (internal issue 826). * Update style guide to prohibit writing non-self-contained (on a single bullet point) Valid Usage statements, and modify offending Valid Usage statements in the Specification to match, to assist with automatic extraction for the validation layers (internal issue 828). * Add ename:VK_VALIDATION_CHECK_SHADERS_EXT to elink:VkValidationCheckEXT of the `VK_EXT_validation_flags` extension, to selectively disable shader validation. * Remove duplicate valid usage statement for slink:VkImageMemoryBarrier. * Modify reflow.py script to place VUID tag anchors standalone on a line following their corresponding bullet point, and reflow the spec text accordingly (this had been pending since the initial tag deployment). New Extensions: * `VK_AMD_texture_gather_bias_lod` ----------------------------------------------------- Change log for May 12, 2017 Vulkan 1.0.49 spec update: * Bump API patch number and header version number to 49 for this update. Github Issues: * Modify reference page extraction script to make internal links to spec anchors refer to the core specification instead of being dangling links (public issue 455). * Fix GL_KHR_vulkan_glsl typo and add a nor-normative mapping to the newly published StorageBuffer class (public issue 466). * Both flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties return ename:VK_ERROR_LAYER_NOT_PRESENT, which covers the error case of an application providing a layer name that wasn't returned by ftext:vkEnumerate{Instance|Device}LayerProperties (public issue 487). * The specification for flink:VkApplicationInfo::apiVersion says that the driver must return ename:VK_ERROR_INCOMPATIBLE_DRIVER in the case that pname:apiVersion specifies a non-supported version. That means that the valid usage should not also state that, and so the VU statement is removed. The VU had language about "`an effective substitute`" that would have been lost, and so it was moved to the pname:apiVersion description (public issue 488). Internal Issues: * Modify implicit validity generator script to assign asciidoc anchors to all valid usage statements it generates, and reflow.py script to insert Valid Usage ID (VUID) tags into the specification source files for explicit valid usage statements. This has no semantic effects on the specification, but will support the validation layer's detection of valid usage violations and allow it to link into the corresponding part of the specification (internal issue 583). * Assign VUID tags to all explicit VU statements and document the process and tag format in the style guide (internal issue 583). * Clarify the rules of whether to structure new functionality as instance extensions, device extensions, or both in the <> section (internal issue 749). * Require that SPIR-V run-time arrays are only used with the code:BufferBlock decoration (internal issue 750). * Fix implicit and explicit valid usage statements for slink:VkWriteDescriptorSet::pname:dstSet (internal issue 767) * Fix SPIR-V code sample for ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER in the <> section (internal issue 770). * Clarify that disabling depth testing also disables depth writes in the <> section (internal issue 775). * flink:VkDescriptorImageInfo::pname:imageLayout must match the actual imageLayout at the time the image is accessed. This was in the spec text, but needed an associated valid usage statement. * Note that only 32-bit atomic operations are supported in the <> section. * Note that code:UniformConstant variables must not have initializers in the <> section. * Add a new elink:VkObjectType enumeration to the core API, promoted from elink:VkDebugObjectTypeEXT, since it is used for much more than just the debug_report extension. New Extensions: * `VK_KHR_get_surface_capabilities2` * `VK_KHR_shared_presentable_image` ----------------------------------------------------- Change log for April 15, 2017 Vulkan 1.0.48 spec update: * Bump API patch number and header version number to 48 for this update. Internal Issues: * Add missing VU statements for flink:vkUpdateDescriptorSets (internal issue 333). * Correct swapped ifdef/ifndef blocks for `VK_KHR_maintenance1` extension (internal issue 776). ----------------------------------------------------- Change log for April 8, 2017 Vulkan 1.0.47 spec update: * Bump API patch number and header version number to 47 for this update. Github Issues: * Allow <> (also described for slink:VkSubpassDependency) to have earlier stages depend on later stages if all stages are framebuffer-space (public issue 125). * Clarify when pipeline state structures are ignored in the slink:VkGraphicsPipelineCreateInfo strucure, when the tessellation structure must be valid, and remove 'if `NULL`' descriptions from the valid usage statements (public issue 445). * Remove the obsolete "validextensionstructs" attribute for flink:VkPresentRegionsKHR. This caused a pname:pNext valid usage statement to be generated which wasn't consistent with what is stated in the spec (public issue 481). Internal Issues: * Clarify facingness of non-polygon fragments for slink:VkStencilOpState and in the code:FrontFacing <>. Define 'facingness' of a fragment as a distinct term from facingness of a polygon (internal issue 662). * Clarify that the texture compression features (e.g. pname:textureCompressionBC) means that all formats of that type (<>, <>, <>) are supported, and that support for individual formats may: queried separately (internal issue 663). * Clarify in the valid usage for slink:VkBindImageMemoryInfoKHX that each SFR rectangle must be a multiple of the sparse block size for each aspect, e.g. in a depth/stencil image using separate depth/stencil planes (internal issue 721). * Re-remove KHX variants of KHR structure types after promotion (internal issue 762). ----------------------------------------------------- Change log for March 31, 2017 Vulkan 1.0.46 spec update: * Bump API patch number and header version number to 46 for this update. Github Issues: * Add language to the <> section allowing values to be returned from Vulkan that are not present in extensions explicitly enabled by the application, similar to existing language for bit flags in the <> section (public issue 442). * *Important*: run `gem update --pre asciidoctor-pdf` before trying to build this version of the spec - 1.5.0.alpha15 is required for this change. Removes the monkey patch currently used to draw valid usage blocks across multiple pages which had numerous issues. A fixed version was incorporated into Asciidoctor-PDF for the latest release, so the monkey patch or any variant thereof is no longer required (public issue 465). Internal Issues: * Add ename:VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_KHR_EXT to `VK_EXT_debug_report` extension * Fix ptext:pNext member of slink:VkPhysicalDeviceDiscardRectanglePropertiesEXT to be a non-const pointer. Properties structures return values, so the chain should be non-const. * Explicitly remove gl_NumSamples from the `GL_KHR_vulkan_glsl` extension, against 1.0 (internal issue 612). * Add Valid Usage statements requiring that each structure type valid in a ptext:pNext chain must: not appear more than once in a chain (internal issue 752). * Use ename:VK_USE_PLATFORM_WIN32_KHX in the `VK_KHX_external_memory_win32` extension, rather than etext:_KHR (internal issue 754). New Extensions: * `VK_KHR_incremental_present` ----------------------------------------------------- Change log for March 24, 2017 Vulkan 1.0.45 spec update: * Bump API patch number and header version number to 45 for this update. Github Issues: * Defined the lifetime of the memory pointed to by slink:VkDisplayPropertiesKHR::pname:displayName to be equal to that of its associated display handle (public issue 460). * Correct several cases where the sparse memory feature name pname:residencyNonResidentStrict was written as pname:sparseResidencyNonResidentStrict (public issue 475). Internal Issues: * Fix ptext:pNext member of slink:VkPhysicalDeviceGroupPropertiesKHX to be a non-const pointer. Properties structures return values, so the chain should be non-const. * Clarify definition of memory aliasing to consistently use the terms "linear" and "non-linear" when referring to resources, and define what those terms mean. * Modified XML schema and implicit validity scripts to generate language for all ptext:pNext values in a ptext:pNext chain instead of just the top level struct, and made `noautovalidity` functional for ptext:sType and ptext:pNext (internal issue 535). * Add more detail for BT2020 and scRGB color spaces in `VK_EXT_swapchain_colorspace` extension (internal issue 632). * Add naming rules for Extension Structure Names (structures added to the ptext:pNext chain of a base structure) to the style guide (internal issue 706). * Define the glossary term "ptext:pNext chain", and use it consistently in the spec (internal issue 744). ----------------------------------------------------- Change log for March 17, 2017 Vulkan 1.0.44 spec update: * Bump API patch number and header version number to 44 for this update. Github Issues: * Fix description of <> (public issue 290). * Better specify VK_DEVICE_LOST behavior around flink:vkQueueSubmit, flink:vkWaitForFences, and flink:vkGetFenceStatus (public issue 423). * Clarify definition of flink:vkGetQueryPoolResults::pname:queryCount (public issue 441). * Simplify and clean up normative language. Remove shall and replace recommend and variants with should wherever possible (public issue 448). * Fix all dangling internal cross-references in the 1.0-extensions specification, and add scripts/checkXrefs to find these in the future (public issue 456). * Reverse order of ChangeLog.txt entries so the most recent version is documented first (public issue 463) * Removes "become invalid" which clashes with invalid state for command buffers. (public issue 467) * Disallowed pending state in spec text for vkResetCommandBuffer, matching valid usage (public issue 468) * Removes sentence describing invalid state "like initial state". (public issue 469) * Disallows begin command buffer from resetting command buffers in the "recording" state. (public issue 470) * Removes mention of state from description of VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT (public issue 471) * Removed extra valid usage statement in VkSubmitInfo (public issue 472) Internal Issues: * Clarify description of the pname:imageLayout member of sname:VkDescriptorImageInfo. * Fix typos where etext:VK_VIEW_TYPE* was used instead of etext:VK_IMAGE_VIEW_TYPE. * Removed the <> and <> example code from the specification and noted it has been moved to the Vulkan SDK cube demo (internal issue 179). * Reorder VkExternalMemoryHandleTypeFlagBitsNV description (internal issue 480). * Clarify than an implementation is <> in a bitfield (internal issue 640). * Break Valid Usage statements describing unrelated parameters into separate statements, and add a style guide entry to follow this approach (internal issue 685). * Move valid usage statement for slink:VkImageCreateInfo from spec body to the explicit valid usage block (internal issue 693). * Fix typos in the descriptions of slink:VkDisplaySurfaceCreateInfoKHR, flink:vkCreateDisplayModeKHR, and flink:vkGetDisplayPlaneSupportedDisplaysKHR in the <> section (internal issue 698, 704, 716). * Clarified that mandatory depth/stencil formats are only a requirement for 2D images (internal issue 719). * Clarify that variables decorated with DeviceIndex/ViewIndex must be in the Input storage class (internal issue 733). * Work around generator script problem with removal of Unicode literals from Python 3.0-3.2 using `future` package (internal issue 737). * Remove nonexistent structure type enums from vk.xml (internal issue 738). * Fix validextensionstructs attributes for structures in the pname:pNext chain for VkPresentInfoKHR, fixing implicit valid usage statements for those structures (internal issue 740). ----------------------------------------------------- Change log for March 10, 2017 Vulkan 1.0.43 spec update: * Bump API patch number and header version number to 43 for this update. Github Issues: * Make clearer that color write mask is applied regardless of whether blending is enabled, by referring to the <> section (public issue 241). * Fix public issue 414: ** Added two new command buffer states (invalid, pending), and an explicit "command buffer lifecycle" section to explain them. ** Replaced "pending execution" with "in the pending state". ** Replaced a bunch of "this will invalidate the command buffer" language with "this will move the command buffer to the invalid state", and added validation language for what state those command buffers should be in. ** Added additional validation language about what state a command buffer should be in for various commands that affect it. ** Added invalidation language to destroy commands in the lifetimes section of fundamentals. ** Added command buffers to list of objects which must not be deleted whilst a (primary) command buffer is in the recording or pending state. * Update `GL_KHR_vulkan_glsl` extension to allow anonymous push constant blocks (public issue 428). Internal Issues: * Document rules about extension interactions in the style guide (internal issue 579). * Require ename:VK_PRESENT_MODE_MAILBOX_KHR support in queries of surfaces created with flink:vkCreateWaylandSurfaceKHR using the VK_KHR_wayland_surface extension (internal issue 666). * Remove Valid Usage constraints for flink:vkAllocateDescriptorSets when the `VK_KHR_maintainance1` extension is present (internal issue 686). * Remove undocumented KHX-variants of vkGetPhysicalDeviceProperties2KHR and vkGetPhysicalDeviceImageFormatProperties2KHR from the <> and <> extensions. New Extensions: * `VK_EXT_hdr_metadata` * `VK_GOOGLE_display_timing` ----------------------------------------------------- Change log for February 27, 2017 Vulkan 1.0.42 spec update: * Bump API patch number and header version number to 42 for this update (the first anniversary edition). Github Issues: * Changed asciidoctor macros so cross-page links in the standalone reference pages function properly (public issue 462). Internal Issues: * Clarified host visibility discussion for slink:VkMemoryType, flink:vkInvalidateMappedMemoryRanges, elink:VkAccessFlagBits, and the <> section, removing duplicated information and adding a central definition in the access types section (internal issue 552). * Change description of slink:vkGetPhysicalDeviceSurfacePresentModesKHR::pname:pPresentModes to return an array of values, not structures (internal issue 699). New Extensions: * Add a NOTE to the <> chapter describing the experimental status of `KHX` extensions. * Add new Khronos, Khronos Experimental, and vendor Vulkan extensions for release at GDC: ** VK_KHR_descriptor_update_template ** VK_KHR_push_descriptor ** VK_KHX_device_group ** VK_KHX_device_group_creation ** VK_KHX_external_memory ** VK_KHX_external_memory_capabilities ** VK_KHX_external_memory_fd ** VK_KHX_external_memory_win32 ** VK_KHX_external_semaphore ** VK_KHX_external_semaphore_capabilities ** VK_KHX_external_semaphore_fd ** VK_KHX_external_semaphore_win32 ** VK_KHX_multiview ** VK_KHX_win32_keyed_mutex ** VK_EXT_discard_rectangles ** VK_MVK_ios_surface ** VK_MVK_macos_surface ** VK_NVX_multiview_per_view_attributes ** VK_NV_clip_space_w_scaling ** VK_NV_geometry_shader_passthrough ** VK_NV_sample_mask_override_coverage ** VK_NV_viewport_array2 ** VK_NV_viewport_swizzle * Add new GLSL vendor extensions to support new builtin variables: ** GL_EXT_device_group ** GL_EXT_multiview ----------------------------------------------------- Change log for February 17, 2017 Vulkan 1.0.41 spec update: * Bump API patch number and header version number to 41 for this update. Github Issues: * Made all uses of `NULL` vs. code:VK_NULL_HANDLE consistent (public issue 276). * Clarify render pass compatibility in different usage scenarios (public issues 303 and 304). * Add valid usage statements to slink:VkFramebufferCreateInfo requiring that the width, height, and number of layers of the framebuffer all be nonzero (public issue 432). * Allow `offset` and `align` in any GLSL version for the `GL_KHR_vulkan_glsl` extension (public issue 435). * Specify lifetime of string objects passed to the tlink:PFN_vkDebugReportCallbackEXT user callback in the +VK_EXT_debug_report+ extension (public issue 446). * Fix inter-page links in multi-file reference pages (public issue 454). Internal Issues: * Update valid usage language for slink:VkImageCreateInfo to disallow creating images that have ename:VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT set without other attachment usage bits (ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT, ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, or ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT) (internal issue 540). * Disable `VK_EXT_swapchain_colorspace` extension until internal issues 640 and 661 are mutually resolved. * Allow alternative mipmap level selection when [eq]#lambda == 0.5# during texture <> (internal issue 680). Other Issues: * Add a clarification to the style guide that the extension revision number is treated as a patch number, so that changes to published extensions should only include bug fixes and spec clarifications. ----------------------------------------------------- Change log for February 10, 2017 Vulkan 1.0.40 spec update: * Bump API patch number and header version number to 40 for this update. * There is a major build change in this release. We are now using the Ruby-based ``asciidoctor'' implementation, rather than the Python-based ``asciidoc'' implementation, to process the specification. While the actual specification markup changes were minimal, this requires a new set of build tools and a very different installation process, especially because we now use an experimental direct-to-PDF backend for Asciidoctor instead of Docbook->dblatex->PDF. It is no longer possible to build the Specification using asciidoc. See doc/specs/vulkan/README.adoc for some guidance on installing the new toolchain components. * There are some minor rendering issues in the PDF output due to teething problems with the asciidoctor toolchain, especially with mathematical equations. We are aware of these and working on them. Github Issues: * Updated sample code for the <> (public issue 97). * Modify line and point clipping behavior in the <> section to allow for pop-free behavior. The ability to check for which behavior is implemented may be added a future feature or extension (public issue 113). * Unify the discussions of implicit ordering throughout the spec, in particular in the new sections <>, <>, and <>; the discussion of <>; and references elsewhere to these sections (public issue 133). * Clarify \<\> language and introduce the term ``identically defined'' (public issue 164). * Add a dependency to the +VK_EXT_debug_marker+ extension that's needed to reuse the object type enum from +VK_EXT_debug_report+, and moves the definition of that enum into +VK_EXT_debug_report+ where it should be (public issue 409). * Remove redundant valid usage statement from slink:VkImageBlit (public issue 421). * Update GL_KHR_vulkan_glsl to allow the ternary operator to result in a specialization constant (public issue 424). * Fix valid usage for flink:VkPipelineShaderStageCreateInfo (public issue 426). * Correct typo in New Objects list for <> (public issue 447). Internal Issues: * Moved to asciidoctor for spec builds (internal issue 121). * Update style guide to describe where to put new extensions-specific asciidoc files, and what to name them (internal issue 626). * Add src/spec/indexExt.py to autogenerate registry index entries linking into the 1.0-extensions specification, instead of maintaining the index manually. (internal issue 642). * Autogenerate extension dependencies and lists of all extensions and all KHR extensions from the "supported" attributes in +vk.xml+. Execute +make config/extDependency.sh+ from +doc/specs/vulkan+ when a supported extension is added to vk.xml, to regenerate the dependency script. The consequence is that specifying a single extension to the +makeExt+ script will automatically enable all extensions it depends on as well, and that the +makeAllExts+ and +makeKHR+ scripts do not need to be updated when a new extension is supported (internal issue 648). * Put extension appendices all at the same asciidoc section level, so KHR WSI extensions show up in the HTML index (internal issue 648). Other Issues: * Imbed images in the generated HTML specs instead of loading them from the images/ directory. * Fix missing EXT in extension name (ename:VK_EXT_SWAPCHAIN_COLOR_SPACE_EXTENSION_NAME). * Add new +VK_EXT_SMPTE_2086_metadata+ extension. * In the <> section of the `VK_KHR_xlib_surface` specification, add language warning users that they always need to call code:XinitThreads. * Use the term "presentable image" (rather than "swapchain image") consistently in `VK_KHR_swapchain` and related extensions, and add a glossary term defining it. * Relocate the valid usage for samples of flink:vkGetPhysicalDeviceSparseImageFormatProperties2KHR::pname:pFormatInfo to be below the flink:VkPhysicalDeviceSparseImageFormatInfo2KHR structure. ----------------------------------------------------- Change log for January 23, 2017 Vulkan 1.0.39 spec update: * Bump API patch number and header version number to 39 for this update. Github Issues: * Clarified that only accesses via the specified buffer/image subresource ranges are included in the access scopes (public issue 306). * Add missing valid usage statements for flink:vkCreateComputePipelines and flink:vkCreateGraphicsPipelines (public issue 427). Internal Issues: * Add a Note to the <> appendix about a difference between OpenGL and Vulkan with regards to how primitives derived from offsets are handled (internal issue 355). * Add the +<>+, +<>+, and +<>+ extensions (internal issue 448). * Add the +<>+ and +<>+ extensions (internal issue 449). * Update the texture level-of-detail equation in the <> section to better approximate the ellipse major and minor axes (internal issue 547). * Forbid non-explicitly allowed uses of interface decorations in the introduction to the <> chapter (internal issue 607). * Replace use of MathJax with KaTeX, for improved load-time performance as well as avoiding the scrolling-and-scrolling behavior due to MathJax asynchronous rendering when loading at an anchor inside the spec. This change also requires moving to HTML5 output for the spec instead of XHTML, and there is a visible difference in that the chapter navigation index is now in a scrollable sidebar instead of at the top of the document. We may or may not retain the nav sidebar based on feedback (internal issue 613). * Improve consistency of markup and formatting in extension appendices (internal issue 631). Other Issues: * Add explicit valid usage statements to slink:VkImageCopy requiring that the source and destination layer ranges be contained in their respective source and destination images. * Add valid usage language for swapchain of flink:vkAcquireNextImage. If the swapchain has been replaced, then it should not be passed to flink:vkAcquireNextImage. * Add a valid usage statement to flink:vkCreateImageView, that the image must have been created with an appropriate usage bit set. * Noted that slink:VkDisplayPresentInfoKHR is a valid extension of slink:VkPresentInfoKHR in the <> section. * Update valid usage for flink:vkCmdSetViewport and flink:vkCmdSetScissor to account for the multiple viewport feature. If the feature is not enabled, the parameters for these functions have required values that are defined in the <> section of the spec but were not reflected in the valid usage text for these functions. * Add the +<>+ extension defining common color spaces. ----------------------------------------------------- Change log for December 16, 2016 Vulkan 1.0.38 spec update: * Bump API patch number and header version number to 38 for this update. Github Issues: * Make ename:VK_PIPELINE_STAGE_HOST_BIT invalid for all stage masks, except for flink:vkCmdWaitEvents (public issue 261). Internal Issues: * Added validation language for flink:vkQueueBindSparse, slink:VkPresentInfoKHR, and slink:VkSubmitInfo, and a note to the <> section to clarify that semaphores must be signaled and waited on in a 1:1 fashion (internal issue 546). * Modify valid usage for slink:VkBufferImageCopy to only require pname:bufferOffset to be a multiple of the image format's element size when the format is not depth/stencil (internal issue 594). Other Issues: * Vulkan(R) is now a registered trademark symbol, and this is reflected in documents and copyright statements. ----------------------------------------------------- Change log for December 10, 2016 Vulkan 1.0.37 spec update: * Bump API patch number and header version number to 37 for this update. Github Issues: * Add usability guarantees on the values returned by flink:vkGetPhysicalDeviceSurfaceCapabilitiesKHR in the slink:VkSurfaceCapabilitiesKHR structure and by flink:vkGetPhysicalDeviceSurfaceFormatsKHR in the pname:pSurfaceFormatCount parameter (public issue 385). * Add elink:VkDebugReportObjectTypeEXT enumerants for new object types introduced by new extensions (public issue 408). * Add +VK_NVX_device_generated_commands+ etext:ACCESS bits and define how they are used (public issue 415). * Fix indentation for slink:VkDebugReportCallbackCreateInfoEXT member descriptions (public issue 419). Internal Issues: * Expand requirements memory binding of non-sparse images and buffers from the <> section into valid usage statements for all of the applicable API calls (internal issue 508). * Explicitly state that valid usage of flink:vkCreateImage requires that flink:vkGetPhysicalDeviceImageFormatProperties would return ename:VK_SUCCESS for the requested image configuration (internal issue 598). ----------------------------------------------------- Change log for December 1, 2016 Vulkan 1.0.36 spec update: * Bump API patch number and header version number to 36 for this update. Github Issues: * Fix "recorded with" terminology in the valid usage language for the flink:vkCmdExecuteCommands::pname:pCommandBuffers parameter (public issue 390). * Modify +genvk.py+ to support specifying extensions to remove from output generators, allowing the extension loader +vulkan_ext.c+ to be created without WSI extensions which are statically exported by the Vulkan loader (public issue 412). * Added validation language for slink:VkSubpassDependency and in the <> section to catch access masks that include bits which are not supported by pipeline stages in the stage masks (partially addresses github.com/KhronosGroup/Vulkan-LoaderAndValidationLayers/issues/1006 ). Internal Issues: * Added validation language for flink:vkCmdWaitEvents, flink:vkQueueSubmit, flink:VkRenderPassCreateInfo, and in the <> section to prevent recording stage dependencies that aren't supported on the queue (internal issue 516). * Make a few changes that generalize spec language for use with possible future extensions by adding glossary terms and generalizing ``feature'' to ``feature or extension'' where relevant (internal issues 448, 590). * Added "pipeline type" attribute to +vk.xml+ for relevant commands and utilize it in automatic generation of the Command Properties table (internal issue 517). * Specify that WSI implementations must provide both UNORM and sRGB formats in the description of slink:VkColorSpaceKHR (internal issue 529). * Remove nesting of explicit valid usage statements where it is not meaningful (internal issue 583). Other Issues: * Add validity language requiring that slink:VkPushConstantRange::pname:offset be a multiple of 4, as stated in the spec language. ----------------------------------------------------- Change log for November 25, 2016 Vulkan 1.0.35 spec update: * Bump API patch number and header version number to 35 for this update. Github Issues: * Document in the <> section that mapping and unmapping does not invalidate or flush the mapped memory (public issues 27, 126). * Redefine the entire <> chapter in terms of consistent and well defined terminology, that's called out at the start of the chapter. This terminology is applied equally to all synchronization types, including subpass dependencies, submissions, and much of the implicit ordering stuff dotted around the spec. Key terms are laid out in the <> section at the top of the rewritten chapter (public issues 128, 131, 132, 217, 299, 300, 302, 306, 322, 346, 347, 371, 407). * Specify order of submission for batches in the <> and <> commands (public issue 371). * Add valid usage statements to each of the WSI extension sections indicating that the WSI-specific structure parameters must be valid, and remove automatically generated valid usage statements now covered by the manual sections (public issue 383). * Clarify render pass compatibility for flink:vkCmdExecuteCommands (public issue 390). Internal Issues: * Update +vk.xml+ to make previously explicit valid usage statements for <> implicit instead (internal issue 553). * Add valid usage statement for slink:VkCreateImageInfo preventing creation of 1D sparse images (internal issue 573). * Fix Python scripts to always read/write files in utf-8 encoding, and a logic error in reflib.py which could cause a fatal error for malstructured asciidoc (internal issues 578, 586). ----------------------------------------------------- Change log for November 18, 2016 Vulkan 1.0.34 spec update: * Bump API patch number and header version number to 34 for this update. Github Issues: * Allow vkUpdateDescriptorSets overflow to skip empty bindings. Clarify that unused bindings have a descriptorCount of zero. Improve some valid usage for vkUpdateDescriptorSets (public issue 256). * Require that slink:VkImageSubresourceRange always define a non-empty range of the resource (public issue 303). * Added valid usage for slink:VkPresentInfoKHR on the layout of presented images (public issue 397). Internal Issues: * Add dependency in src/spec/Makefile so specversion.txt is regenerated when needed (internal issue 462). * Shorten the table of contents in the single-page ref page HTML output. Still working on the PDF (internal issue 536). ----------------------------------------------------- Change log for November 11, 2016 Vulkan 1.0.33 spec update: * Bump API patch number and header version number to 33 for this update. Github Issues: * Added implicit external synchronization parameters to vkBegin/EndCommandBuffer, and fixed missing command pool host synchronization from per-command lists (public issue 398). * Started using git tags including the spec release number, such as 'v1.0.32-core', instead of tags including the date of release, such as 'v1.0-core-20161025' (public issue 405). Internal Issues: * Add validity constraint for slink:VkImportMemoryWin32HandleInfoNV::pname:handle (internal issue #480). * Add scripts to compare two Vulkan HTML specifications, derived from W3 htmldiff service (internal issue 525). * Relax requirement that memoryTypeBits can't depend on format, to allow it to differ only for depth/stencil formats (internal issue 544). * Add a new generator script to create a simple extension loader for Vulkan based on +vk.xml+ (internal issue 558). * Add the overlooked requirement that buffer and image memory alignment requirements must be a power of two in the <> section (internal issue 569). Other Issues: * Add a naming rule to the style guide for members of extension structures defining array lengths which are the same as array lengths of the core structure they are chained from. * Add a new generator to create a simple extension loader in +src/ext_loader/vulkan_ext.[ch]+ from +vk.xml+. This code can be included in your project, and is expected to be packaged in the Vulkan SDK provided by LunarG in the future. ----------------------------------------------------- Change log for October 25, 2016 Vulkan 1.0.32 spec update: * Bump API patch number and header version number to 32 for this update. Github Issues: * Add automatic visibility operations to the presentation engineE when doing a queue present in flink:vkAcquireNextImageKHR. Removed all references to MEMORY_READ that referenced WSI - they no longer make sense (some aspects of public issues 128, 131, 132, 261, and 298). * Document valid non-boolean +externsync+ attribute values for tags in +vk.xml+ (public issue 265). * Add valid usage to slink:VkImageCreateInfo requiring that pname:arrayLayers be 1 for images of type ename:VK_IMAGE_TYPE_3D (public issue 319). * Add missing captions to figures in the <> chapter (public issue 334). * Clarify WSI interaction with exclusive sharing mode (public issue 344). * Added explicit language clarifying the allowed queue usage of resources created with ename:VK_SHARING_MODE_CONCURRENT (public issue 386). * Require that the slink:VkDescriptorSetLayoutCreateInfo::pname:binding members of the pname:pBindings array passed to flink:vkDescriptorSetLayoutCreateInfo all be distinct (public issue 391). Internal Issues: * Remove empty validity blocks from +vk.xml+ and suppressed broken validity statements and added missing statements to explicit validity. Doesn't affect output, other than some statements appearing in another block now (internal issue 513). ----------------------------------------------------- Change log for October 14, 2016 Vulkan 1.0.31 spec update: * Bump API patch number and header version number to 31 for this update. Github Issues: * Clarifying wording of slink:VkGraphicsPipelineCreateInfo parameters and adding Valid Usage statements on render pass compatibility to the <> (public issue 375). * Replace 'texel size' with 'element size', and add a definition to the glossary (public issue 382). * Clarify the description of ename:VK_ERROR_NATIVE_WINDOW_IN_USE_KHR to make it accurate, but still generic (non-exhaustive). Remove two Valid Usage statements describing error situations that will return ename:VK_ERROR_NATIVE_WINDOW_IN_USE_KHR (public issue 387). * Fix refBegin tag for elink:VkDebugReportFlagBitsEXT (public issue 392). * The <> code:PrimitiveId in a fragment shader needs the code:Input storage class (public issue 393). Internal Issues: * Unused ({y,z} and {height,depth} for 1D, z and depth for 2D) offsets must be 0 and unused extents must be 1. Added basic offset and extent valid usage for slink:VkImageResolve to match that of slink:VkImageCopy (internal issue 413). * Describe what flink:vkGetPhysicalDeviceImageFormatProperties returns for pname:sampleCounts when for pname:usage only includes transfer-related flags (internal issue 478). * Remove mention of slink:VkPhysicalDeviceLimits::pname:maxImageArrayLayers from the valid usage for slink:VkImageCreateInfo::pname:arrayLayers (internal issue 520). * Tag usages of ``dynamically uniform'' as glossary terms and add a glossary entry pointing to the SPIR-V Specification's definition of the term (internal issue 531). ----------------------------------------------------- Change log for October 7, 2016 Vulkan 1.0.30 spec update: * Bump API patch number and header version number to 30 for this update. Github Issues: * Document missing pname:sType and pname:pNext parameters for slink:VkCommandBufferInheritanceInfo (public issue 224). * As promised, we are removing the example code, from the appendix, for the VK_KHR_surface and VK_KHR_swapchain extensions. The cube demo (shipped in the official Khronos SDK) has been updated, and is the example code that we want people to look at for how to use these two extensions (public issues 279, 308, and 311). * Clarify the formats for which the slink:VkClearColorValue pname:float32 member is used. Also clean up related language for flink:vkCmdBlitImage (public issue 369). * Reword the <> appendix chapter to better match Vulkan terminology (public issue 372). Internal Issues: * Update slink:VkMemoryRequirements to not require a host_visible memory type exists that can be bound to sparse buffers (internal issue 494). * Modify the <> language to allow multisampled depth-stencil images (internal issue 521). ----------------------------------------------------- Change log for September 30, 2016 Vulkan 1.0.29 spec update: * Bump API patch number and header version number to 29 for this update. Github Issues: * Remove redundant constraint on slink:VkCommandBufferInheritanceInfo::pname:queryFlags (public issue 224). * Fix typo and remove link in Note in the <> section (public issue 359). * Fix erroneous validation statement for the pname:layout member of slink:VkComputePipelineCreateInfo (public issue 362). Internal Issues: * Restore long figure captions using asciidoc sidebar blocks, due to restrictions of asciidoc syntax (internal issue 101). * Replace most latexmath equations with comparable markup in straight asciidoc, which significantly improves time required to fully load and process the HTML forms of the Specification. There are known minor font and alignment inconsistencies with MathJax and PDF rendering of latexmath equations. Please do not file github issues about these. We are aware of the inconsistencies and will make refinements over time, while the performance improvements are compelling in at least some major browsers (internal issue 313). * Move handcoded validity statements from +vk.xml+ into the Specification body, easing work in the single-branch model. Specify the distinction between these explicit statements, and the implicit validity statements inferred from vk.xml. Validity statements now appear in two blocks for each command and structure - handcoded "Valid Usage" and the implicit "Valid Usage (Implicit)" (internal issue 392). * Add the +returnedonly="false"+ attribute to WSI output structures, removing incorrectly generated implicit validity statements for slink:VkDisplayPropertiesKHR, slink:VkDisplayPlanePropertiesKHR, slink:VkDisplayModePropertiesKHR, slink:VkDisplayPlaneCapabilitiesKHR, slink:VkSurfaceCapabilitiesKHR, and slink:VkSurfaceFormatKHR structures (internal issue 486). * Update slink:VkImageLayout to require the ename:VK_IMAGE_USAGE_SAMPLED_BIT be set for sampled depth/stencil images (internal issue 487). * Use an explicit format specifier string for the date command invocation in the +Makefile+ instead of the shorthand -R option, which doesn't work on BSD and MaxOS X date commands (internal issue 500). Other Issues: * Use the terms ``allocation scope'' and ``extension scope'' instead of just ``scope'', and add them to the glossary. ----------------------------------------------------- Change log for September 23, 2016 Vulkan 1.0.28 spec update: * Bump API patch number and header version number to 28 for this update. Github Issues: * Minor spelling and typography cleanup, add definitions of ename:VK_FALSE and ename:VK_TRUE as just what their names say (public issues 220, 318, 325, 365; internal issues 451, 496) * Clarify that the pname:maxDescriptorSet limits in the <> table are n * maxPerStage limit (where n=number of supported stages) (public issue 254). * Minor cleanup to <> appendix (public issue 314). * Add valid usage statement to slink:VkPipelineLayoutCreateInfo disallowing multiple push constant ranges for the same shader stage (public issue 340). * Clarify the elink:VkSharingMode description of what executing the "same" barriers means in case of ownership transfer (public issue 347). * Rename copyright.txt and add COPYING.md to try and reduce confusion about applicable copyrights (public issue 350). * Extend the table in the <> section to describe the external headers included when each etext:VK_USE_PLATFORM_* macro is defined (public issue 376). Internal Issues: * Add "Revision History" to the PDF outputs following the table of contents, to match HTML outputs (internal issue 43). * Clarified that flink:vkMapMemory may fail due to virtual address space limitations (internal issue 346). * Add +refBody+ comment markup for ref page autoextraction when required (internal issue 400). * Document proper use of "mipmap" and "mip" in the style guide API naming rules, matching the spelling rules (internal issue 471). * Tweak the <> appendix to note that the Specification may be built with arbitrary combinations of extensions (internal issue 483). * Remove incorrect statement allowing slink:VkClearAttachment::pname:colorAttachment to be >= slink:VkSubpassDescription::pname:colorAttachmentCount (internal issue 488). * The <> is expressed in terms of the pname:maxViewportDimensions but this is actually two values. Clarify that it's based on the larger of the two (if they differ) (internal issue 499). Other Issues: * Reflowed text of the entire spec using the 'reflow' Makefile target, to (hopefully) reduce future internal git churn as edits are made and extensions added in return for one-time pain. This has no perceptible effect on the spec outputs, but considerable changes on the asciidoc source (internal issue 367). ----------------------------------------------------- Change log for September 16, 2016 Vulkan 1.0.27 spec update: * Bump API patch number and header version number to 27 for this update. Github Issues: * Weaken flink:vkGetPipelineCacheData invariance conditions; previous conditions were stronger than agreed and can't be guaranteed (public issue 280). * Add link to "Vulkan Loader Specification and Architecture Overview" document to Normative References section (public issue 359). Internal Issues: * Be more clear in the <> section that block offsets can be out of order (internal issue 396). * Document that extension authors should add support for their extensions to the validation layers (internal issue 398). * Clarify that the valid range of depth clear values should be limited to the 0..1 range and that copies to depth aspect must also be in this range (internal issue 412). * Specify ``a'' vs. ``an'' use in the style guide (internal issue 432). * Increase the maximum pname:nonCoherentAtomSize value in the <> section from 128 to 256 (internal issue 435). * Fix vk_platform.h for compiler errors on some Android platforms (internal issue 441). * Clarify that slink:VkPhysicalDeviceFeatures::pname:pEnabledFeatures == `NULL` disables all features, including the "required" feature pname:robustBufferAccess (internal issue 479). Other Issues: * Expand style guide and make it more self-consistent. * Use ISO 8601 date format everywhere. * Emphasise the correct way of using slink:VkSurfaceCapabilitiesKHR::pname:maxImageCount. * Added +VK_EXT_validation_flags+ extension for validation flag mechanism. * Fix an <> to include their current employer. ----------------------------------------------------- Change log for September 6, 2016 Vulkan 1.0.26 spec update: * Bump API patch number and header version number to 26 for this update. Github Issues: * Bring sample code in the `VK_KHR_surface` and `VK_KHR_swapchain` extension summary appendices up to date, and note they will be replaced with pointers to the LunarG SDK examples in the future (public issue 279). * Add a new <> section specifying that ftext:vkGet* and ftext:VkEnumerate* results are invariant unless otherwise specified, and specify behavior for individual commands which are not invariant (public issue 280). * Remove conflicting definition of slink:VkDisplayPlaneCapabilitiesKHR::pname:maxSrcPosition and clean up language of the remaining definition (public issue 351). * Fix many minor spelling errors and add rules to the style guide to prevent recurrences (public issue 352). Internal Issues: * Remove redundant descriptions of the etext:VK_USE_PLATFORM_* macros from the <> chapter in favor of the description in the <> appendix (internal issue 6). * Replace misleading 'can: be destroyed when not X' with more correct 'must: not be destroyed while X' in the <> section. Disallow destroying a pipeline layout while a command buffer using it is recording (internal issue 241). * Clarify that ename:VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT is valid for all images used as attachments in elink:VkImageUsageFlagBits and the slink:VkImageLayout validity language (internal issue 320). * Note that <> may wrap object handles, but that this is a generally discouraged. A link to additional information in the documentation for layer authors is provided (issue 398) * Replace the mustnot: and shouldnot: macros with equivalent must: not and should: not to get rid of non-English words while still highlighting normative language (internal issue 407). * Disallow creating multisampled images with ename:VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT in the slink:VkImageLayout validity language and the <> section (internal issue 445). * Fix typo so that flink:vkCmdDrawIndexedIndirect is defined in terms of flink:vkCmdDrawIndexed rather than flink:vkCmdDrawIndirect (internal issue 446). * Reorganize the per-extension information sections to all be in the <> appendix. Also fix a typo in +VK_IMG_filter_cubic+ which incorrectly identified it as a +KHR+ extension (internal issue 461). Other Issues: * Use asciidoc markup instead of latexmath to simplify diagrams in the <> for color formats. * Fix a markup problem with the wildcarded enumerant names in a NOTE in the <> section. * Fix missing attributes in the XML interface for elink:VkExternalMemoryHandleTypeFlagBitsNV and elink:VkExternalMemoryFeatureFlagBitsNV (KhronosGroup/Vulkan-Hpp issue 25) * Cleanup reference page builds so only core pages are built for releases. ----------------------------------------------------- Change log for August 26, 2016 Vulkan 1.0.25 spec update: * Bump API patch number and header version number to 25 for this update. * Structurally change the specification so that multiple extensions are included in the +1.0+ git branch, and specifications will include or not include those extensions at build time based on options passed to the Makefile. See +doc/specs/vulkan/README.html+ and the ``Layers and Extensions'' section of the ``Vulkan Documentation and Extensions'' document for more information on this change. * Register and publish new extensions in the single-branch form: ** +VK_NV_external_memory_capabilities+ ** +VK_NV_external_memory+ ** +VK_NV_external_memory_win32+ ** +VK_NV_win32_keyed_mutex+ Github Issues: * Clarify description of GetInstanceProcAddr and GetDeviceProcAddr (public issue 212). * Add SPIR-V <> for single-sampled images (public issue 316). * Fix spelling of ``tesselation'' in a few places and note it as an exception to the American spelling rules convention (public issue 327). * Fix Makefile to create output directory for ``styleguide'' target (public issue 329). * Fix numerous minor issues with incorrectly tags on enumerant names and table titles (public issue 330). * Generate specversion.txt date in UTC time and RFC 2822 format (public issue 335). * Convert link to the SPIR-V Specification for flink:VkShaderModuleCreateInfo into an internal link to the normative reference (public issue 336). * Add ename:VK_ERROR_OUT_OF_MEMORY error code to flink:vkCreateDebugReportCallbackEXT (public issue 337). Internal Issues: * Update style guide regarding use of code:NULL and dname:VK_NULL_HANDLE (internal issue 393). * Change the definition of latexmath:[$q$] in the <> section to be the index of the maximum defined level for the view, not the number of levels in the view (internal issue 406). * Allow developers to override dname:VK_DEFINE_NON_DISPATCHABLE_HANDLE with their own binary-compatible definition (internal issue 439). * Fix +vk_platform.h+ conditional logic causing compile failure with some Android compilers (internal issue 441). * Implement the single-branch model as described above (internal issue 461). ----------------------------------------------------- Change log for August 12, 2016 Vulkan 1.0.24 spec update: * Bump API patch number and header version number to 24 for this update. Github Issues: * Fix type mismatch in swapchain image equivalency table (public issue 289). * Fix a copy-and-paste error in the description of flink:vkGetSwapchainImagesKHR::pname:pSwapchainImages, that said it was an array of ``sname:VkSwapchainImageKHR structures'' instead of an array of ``sname:VkImage handles'' (public issue 292). * Specify that ename:VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT is only valid for ename:VK_IMAGE_TYPE_2D images (public issue 293). * Add a valid usage statement to flink:vkCmdExecuteCommands saying that when called outside a render pass instance, the secondary command buffers must not have been created with the ename:VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT (public issue 297). * Fix description of +VK_NO_STDINT_H+ in the <> section (public issue 314). Internal Issues: * Normalize the language for the remaining built-in variables in the <> section. Fix code:FrontFacing and code:HelperInvocation, as they should be of code:boolean type rather than code:integer (internal issue 323). * Clarify that when ename:VK_WHOLE_SIZE is used for a buffer descriptor range, the effective range must still be within the max buffer range (internal issue 426). * Clarify that command buffers and descriptor sets are allocated rather than created. Also clarify when the recording state of a command buffer is relevant (internal issue 434). ----------------------------------------------------- Change log for August 5, 2016 Vulkan 1.0.23 spec update: * Bump API patch number and header version number to 23 for this update. Github Issues: * Add explicit valid value attributes to pname:sType members in vk.xml (public issue 34). * Clarify usage of flink:vkGetInstanceProcAddr and flink:vkGetDeviceProcAddr (public issue 225). * Fix a copy-and-paste error in the description of pname:pSwapchainImageCount saying that it was the count of ``format pairs'' instead of ``swapchain images'' (public issue 292). * flink:vkCmdExecuteCommandBuffers requires all command buffers to be allocated from command pools created for the same queue family (public issue 296). * Remove bogus +optional+ attribute for flink:vkEnumerateDeviceLayerProperties::pname:physicalDevice from vk.xml (public issue 301). * Clean up the <> reference and contents. Use full enumerant names. Refer to pname:layerCount in the ``view parameters'' column instead of pname:arrayLayers. Require N >= 1 for the cube array subview row, not just arrayLayers >= 6 N (public issue 304). * Modify description of <> to be consistent with the description of <> (public issue 307). Internal Issues: * Describe remaining +vk_platform.h+ macros in the <> appendix (internal issue 6). * Clarify <> feature behavior; what memory can be accessed, how bounds checking is performed, and allowing for vectorization (internal issue 332). * Document markup for automatic extraction of reference pages from the spec sources in the style guide (internal issue 395). * Allow flink:vkCreateDisplayModeKHR to return ename:VK_ERROR_INITIALIZAION_FAILED_KHR if the user requests mode parameters that the specified display does not support (internal issue 411). * Remove atomic counters (atomic_uint style) from KHR_vulkan_glsl, and more clearly remove the subroutine keyword alongside it (internal issue 421). * Clarify behavior of flink:vkCmdBindDescriptorSets for descriptor sets not contained in the layout (internal issue 427). Other Commits: * Change the order in which members of sname:VkAttachmentDescription and sname:VkPipelineInputAssemblyStateCreateInfo are described to match their order in the structures. ----------------------------------------------------- Change log for July 22, 2016 Vulkan 1.0.22 spec update: * Bump API patch number and header version number to 22 for this update. Github Issues: * Translate the subpass self-dependency language into concrete validity statements, and added a validity statement about the restrictions on layout parameters (public issue 267). * Add validity requirement that slink:VkAttachmentDescription::pname:finalLayout and slink:VkAttachmentReference::pname:layout must not be ename:VK_IMAGE_LAYOUT_UNDEFINED or ename:VK_IMAGE_LAYOUT_PREINITIALIZED (public issue 268). * Clarify that slink:VkSubpassDescription::pname:pResolveAttachments layouts are used. Make language consistent with other attachment arrays (public issue 270). * Changed 64-bit definition for dname:VK_DEFINE_NON_DISPATCHABLE_HANDLE to work for x32 platform in +vk.xml+ and the resulting +vulkan.h+ (public issue 282). * Add missing error return code for flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 285) * Fix several cases of stext::VkStructName.memberName markup to stext::VkStructName::pname:memberName, to match other usage in the spec, and describe this markup in the style guide (public issue 286). * Modified validity language generation script to avoid redundant common ancestor language if covered by generic parent language, and used `Both' instead of `Each' when appropriate (public issue 288). Internal Issues: * Add language about behavior of flink:vkAllocateDescriptorSets when allocation fails due to fragmentation, a new error ename:VK_ERROR_FRAGMENTED_POOL, and a Note explaining the situation (internal issue 309). * For the features of code:PointSize, code:ClipDistance, and code:CullDistance, the SPIR-V capability is required to be declared on use (read or write) rather than on decoration (internal issue 359). * Have desktop versions of GLSL respect precision qualification (code:mediump and code:lowp) when compiling for Vulkan. These will get translated to SPIR-V's code:RelaxedPrecision decoration as they do with OpenGL ES versions of GLSL (ESSL). The default precision of all types is code:highp when using a desktop version (internal issue 360). * Add validity statement for slink:VkImageCreateInfo specifying that multisampled images must be two-dimensional, optimally tiled, and with a single mipmap level (internal issue 369). * Add validity statements to slink:VkImageViewCreateInfo disallowing creation of images or image views with no supported features. Made some slink:VkImageViewCreateInfo validity statements more precise and consistent. Added a Note to the <> chapter about formats with no features (internal issue 371). * Remove +manpages+ from default build targets. Nroff outputs containing imbedded latexmath will not render properly. Fixing this is a lot of work for limited use cases (internal issue 401). Other Commits: * Fix flink:vkRenderPassBeginInfo::pname:clearValueCount validity statement to be based on attachment indices rather than the number of cleared attachments (Vulkan-LoaderAndValidationLayers/issues/601). * Convert registry documentation from LaTeX to asciidoc source and rename from +src/spec/readme.tex+ to +src/spec/registry.txt+. * Fix lack of Oxford commas in validity language. * Lots of cleanup of generator scripts and Makefiles to move extension list for generator into the script arguments instead of the body of genvk.py, and express better dependencies between XML, scripts, and generated files. ----------------------------------------------------- Change log for July 15, 2016 Vulkan 1.0.21 spec update: * Bump API patch number and header version number to 21 for this update. Github Issues: * Clarify how <> relate to the limits in slink:VkPhysicalDeviceLimits. (public issue 185). * Clarify in the <> section that shader output variables have undefined values until the shader writes to them (public issue 240). * Specify the implicit value of image parameters that cannot be set in slink:VkSwapchainCreateInfo::pname:flags, pname:imageType, pname:mipLevels, pname:samples, pname:tiling, and pname:initialLayout (public issue 243). * Make use of code:NULL and code:VK_NULL_HANDLE consistent in the VK_KHR_swapchain extension (public issue 276). Internal Issues: * Clarify that presenting an image to a display surface swapchain applies the display surface's mode, and that destroying a display surface swapchain may reset the display's mode, in the VK_KHR_display_swapchain extension (internal issue 247). * Better describe what a slink:VkSurfaceKHR is, and that creating one does not set a mode, in the VK_KHR_display extension. This is a round-about way of pointing out that mode setting is not covered by the extension, but rather is performed as a side effect of presentation (internal issue 247). * Add more valid usage statements to flink:vkQueuePresentKHR command when the VK_KHR_display_swapchain extension is present (internal issue 247). * Add more includes to the VK_KHR_swapchain extension to better document interactions with VK_KHR_display_swapchain (internal issue 247). * Clarify restrictions on location aliasing in the <> section (internal issue 370). * Add mathematical description of blitting to flink:vkCmdBlitImage, and link it to the <> chapter. Use mathematical notation for ranges of texel coordinates in the <> chapter. Fixed miscellaneous validity statements for flink:vkCmdBlit and slink:VkImageBlit (internal issue 382). Other Commits: * Added a valid usage rule to flink:VkGraphicsPipelineCreateInfo that the ename:VK_PRIMITIVE_TOPOLOGY_PATCH_LIST topology must only be used when tessellation shaders are used. * Expand the style guide into a formal "Procedures and Conventions" document. Add a API Naming Conventions section, move most of the API Specification Appendix C (Layers and Extensions) content into the new document, and define the resulting procedures as mandatory (where relevant). This more clearly separates use vs. specification of Vulkan APIs. * Update vk_platform.h to handle 32-bit ARMv8 binaries. * Various minor cleanups to the Makefile and build process. ----------------------------------------------------- Change log for July 8, 2016 Vulkan 1.0.20 spec update: * Bump API patch number and header version number to 20 for this update. Github Issues: * Replaced existing reference pages by text automatically extracted from the specification source, or generated from vk.xml in some cases. This is not a complete solution for the reference pages, but puts them in a much better state. The ref pages (only) are now placed under a CC BY open source license, which is more current than the obsolete license previously used. Various minor tweaks to the Specification sources were made to enable this, and a new ``API Boilerplate'' chapter added to include definitions of all the entities in the API and +vulkan.h+ which were not already described in some form in the document. Further improvements to the pages should not edit them directly, but instead concentrate on the specification source from which the ref pages are being extracted (public issues 44, 55, 160; internal issue 389). ----------------------------------------------------- Change log for July 1, 2016 Vulkan 1.0.19 spec update: * Bump API patch number and header version number to 19 for this update. Github Issues: * Clarified how flink:vkGetImageSubresourceLayout interacts with image layouts (public issue 247). * Remove ename:VK_IMAGE_LAYOUT_PREINITIALIZED from valid usage rule for slink:VkImageMemoryBarrier::pname:oldLayout. It is only valid if it is the current layout (public issue 248). * Modify valid usage for flink:vkBindBufferMemory so implementations are free to require a different backing memory size than the buffer size (public issue 251). * Clarify that filtering rules for flink:vkCmdBlitImage always apply, and are usually no-ops if the formats are the same (public issue 253). * Remove 'non-sparse' from description of flink:vkGetBufferMemoryRequirements and flink:vkGetImageMemoryRequirements (public issue 257). * Remove ename:VK_ERROR_LAYER_NOT_PRESENT error code from flink:vkCreateDevice (public issue 259). * Change "must: not" to "should: not" in constraint on when flink:vkAcquireNextImageKHR is called in the VK_KHR_swapchain branch (public issue 262). * Change type of flink:vkCmdUpdateBuffer::pname:pData from basetype:uint32_t* to basetype:void* (public issue 263). * Change should: to must: in description of where additional segments are placed in the <<[tessellation-tessellator-spacing,Tessellator Spacing>> section (public issue 264). Internal Issues: * Normalize the language of all the compute shader built-ins in the <> section (internal issue 323). * Remove definition of presentation engine internal queue lengths associated with ename:VK_PRESENT_MODE_FIFO_KHR and ename:VK_PRESENT_MODE_FIFO_RELAXED_KHR in the <> chapter (internal issue 374). * The language of a Note was too broad, and implied that loaders for a given OS would statically export functions for WSI extensions that were not relevant to (or supported on) the OS. Also, removed "Khronos-provided" since the Android loader is not (internal issue 380) Other Commits: * Add ename:VK_INCOMPLETE to list of return values for flink:vkGetPipelineCacheData. Spec says this value is returnable, but it was not listed in the error codes. * Fix "correponds" typo in member definitions for slink:VkSubpassDescription. ----------------------------------------------------- Change log for June 24, 2016 Vulkan 1.0.18 spec update: * Bump API patch number and header version number to 18 for this update. Github Issues: * Added "queue operation" terminology, and modified spec to actually use this terminology (public issue 155). The act of submitting a piece of work to a queue now generates "operations" for the queue to execute, including operations to wait on/signal semaphores and fences. Synchronization waits on these operations, making execution dependency chains more obvious for semaphores and fences (though additional work is still needed here). These changes include: ** Overview of "queue submission" commands in chapter <>. ** Updated descriptions for fence and semaphore waits and signals in the synchronization chapter <>, <> and <>. ** Clarifications to semaphore and fence operation within queue submission functions. ** New glossary terms. ** Moved device idle and queue wait idle to synchronization chapter in order to describe them in terms of other synchronization primitives. ** Clarifications to semaphore and fence operation allowed removal of the "implicit ordering guarantees" section, as this information is now wholly covered where these primitives are described. *** The "host writes" section of this is still there for now - in its own section. This could probably be merged into other sections later. *** Modified fundamentals chapter on queue ordering to make sense in context of the new changes, and avoid duplication. <> * Added "aspect" and "component" definitions to the glossary, and made sure these terms are referenced correctly (public issue 163). * Update valid usage for ftext:vkGet*ProcAddr to only include conditions that must be met to get a valid result. In particular, it is okay to call flink:vkGetDeviceProcAddr with any string and will get a code:NULL if that string is not a core Vulkan function or an enabled extension function (addresses but does not fully close public issue 214). * Change the WSI extension dependencies to refer to version 1.0 of the Vulkan API, instead of the pre-1.0-release internal revisions numbers (public issue 238). * Specified that <> result in undefined values input to the blending unit or color attachment (public issue 240). * Fix latexmath:[$\leq$] operators turning into Unicode left arrow symbols (public issue 245). Internal Issues: * Better documented that the registry XML "optional" tag for values only applies when that value is the size of an array (internal issue 335). * Add a stronger definition for the valid usages of VkSpecializationMapEntry.size in the <> section (internal issue 345). * Change code:OpName to code:OpDecorate (along with appropriate syntax) for vertex shader built-ins (internal issue 368). * Add missing ref pages (those which are not currently stubs) to apispec.txt for the single-page version of the ref pages (internal issue 378). Other Commits: * Fix example in the <> section to use M, N, and I, describing set, binding, and index, consistently throughout the example code. ----------------------------------------------------- Change log for June 17, 2016 Vulkan 1.0.17 spec update: * Bump API patch number and header version number to 17 for this update. Github Issues: * Update description of vertex shader reuse in <> (public issue 106). * Simplify validity language around pname:ppEnabledExtensionNames and pname:ppEnabledLayerNames (in the <> and <> sections) (public issue 214). * Add missing validity rule to flink:vkCmdBeginRenderPass requiring compatibility between slink:VkAttachmentDescription pname:initalLayout members and the corresponding attached framebuffer images (public issue 233). * Fix Unicode arrows appearing in output instead of relational operators (public issue 239). * Correctly describe the required number of elements for code:TessLevelInner and code:TessLevelOuter arrays in the <> section as two and four, respectively, instead of the other way around, and refer to this section from the <> chapter (public issue 246). Internal Issues: * Document deprecation of ename:VK_COLORSPACE_SRGB_NONLINEAR_KHR in the VK_KHR_surface extension, and of ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT in the VK_EXT_debug_report extension (internal issue 328). * Added language to define what a valid usage statement is and should be, with a note about some apparent weirdnesses this might entail (internal issue 357). Other Commits: * Added missing ename:VK_ERROR_DEVICE_LOST error to flink:vkQueueBindSparse. ----------------------------------------------------- Change log for June 10, 2016 Vulkan 1.0.16 spec update: * Bump API patch number and header version number to 16 for this update. Github Issues: * Clarify that integer border values are meant to be 0/1, and that integer texture lookups are sign-extended in the <> and <> sections (public issue 52). * Add logic to generate spec boilerplate without using the 'git' command-line client, needed when building from a tarball or another source of the Vulkan tree rather than a cloned git repo. Remove boilerplate as part of 'clean' target (public issue 195). * Document that color writes and clears to unused attachments have no effect for slink:VkClearAttachment and elink:VkColorComponentFlagBits (public issue 198). * Fixed flink:vkCmdExecuteCommands validity statement for sname:VkCommandBufferInheritanceInfo::pname:framebuffer. If used, it must match the framebuffer in the current renderpass instance (public issue 226). * Added valid usage language to require for all functions that set dynamic state that the currently bound graphics pipeline has the corresponding dynamic state enabled (public issue 235). Internal Issues: * Clarify for flink:vkEnumerateInstanceExtensionProperties, in the <> section, and in the <> section when functionality should be exposed as an instance extension, as a device extension, or as both (internal issue 109). * Place WorkgroupSize in alphabetical order in the <> section (internal issue 323). * Corrects valid usage in vkEndRenderPass to only affect primary render passes, as secondaries may be entirely within a render pass, and should be able to be ended (previous language disallowed that) (internal issue 338). * Fix relational operator from <= to >= in the <> section (internal issue 343). * Disallow recursion under SPIR-V entry points in the <> section (internal SPIR-V issue 37). Other Commits: * Use standard Python ElementTree package instead of lxml.etree in header / validation layer / include autogeneration from XML, reducing platform dependencies. ----------------------------------------------------- Change log for May 27, 2016 Vulkan 1.0.15 spec update: * Bump API patch number and header version number to 15 for this update. Github Issues: * Fixed the <> entry for Fragment Input Attachment Interface to specify code:UniformConstant storage class (public issue 156). * Disallow lazily allocated memory for buffers in the description of slink:VkMemoryRequirements::pname:memoryTypeBits (public issue 196). * Add numbered figure captions (public issue 219). * Fix output variable names in the <> section and related minor normative language and markup cleanup (public issue 220). Internal Issues: * Fix reference to nonexistent etext:VK_IMAGE_LAYOUT_TRANSFER_{SRC,DST}BIT to the actual etext:VK_IMAGE_LAYOUT{SRC,DST}_OPTIMAL (internal issue 296). * Update the <> to refer to the correct feature names (internal issue 305). ----------------------------------------------------- Change log for May 20, 2016 Vulkan 1.0.14 spec update: * Bump API patch number and header version number to 14 for this update. Github Issues: * Fix validity language for sname:VkCommandBufferAllocateInfo to impose range limits on pname:commandBufferCount (public issue 178). * Fix validity language for flink:vkCmdExecuteCommands to refer to the correct structure names (public issue 179). * Fix two copy-and-paste errors in the WSI queries, where the wrong term was used for what was being returned (public issue 206). * Add a note in the documentation of flink:vkGetPhysicalDeviceSurfaceFormatsKHR, about what it means if ename:VK_FORMAT_UNDEFINED is returned (public issue 207). Internal Issues: * Clarify the usage and correct the name for the bitmask referenced in <> (internal issue 334). Other Commits: * Fix the names of decorations listed in the <> section such that they match the SPIR-V specification. ----------------------------------------------------- Change log for May 13, 2016 Vulkan 1.0.13 spec update: * Bump API patch number and header version number to 13 for this update. Github Issues: * Improve the description of ename:VK_PRESENT_MODE_FIFO_RELAXED_KHR in the VK_KHR_surface extension (public issue 174). * Clarify use of etext:*_SIMULTANEOUS_USE_BIT for secondary command buffers (public issue 182). * Fix typos in VK_KHR_wayland_surface extension where code:wl_device was used instead of code:wl_display (public issue 193). * Replaced {apiname} with ``Vulkan'' in XML validity statements (public issue 199). * Fix dead links for WSI handle types (public issue 200). * Use "signaled" instead of "signalled" spelling everywhere (public issue 201). * Move readme.pdf target directory for XML schema documentation into the target generation directory, instead of leaving it checked into the spec source tree (public issue 203). * Fix duplicate 'which which' typo in description of elink:VkCommandPoolResetFlagBits (public issue 204). * Move the <> section up one level, out of the <> section (public issue 209). Internal Issues: * Clarify in the <> section that implementations should not manage the size of pipeline cache (internal issue 192). * Deprecate the concept of device layers and associated commands (internal issue 255). * Remove ename:VK_INCOMPLETE from the list of possible result codes of flink:vkGetPhysicalDeviceSurfaceCapabilitiesKHR (internal issue 314). * Add missing std140/std430 rule: the base alignment of a member following a structure is a multiple of the structure's base alignment (internal issue 321). * Fixes naming of the single elink:VkColorSpaceKHR enum from ename:VK_COLORSPACE_SRGB_NONLINEAR_KHR to ename:VK_COLOR_SPACE_SRGB_NONLINEAR_KHR in XML/header and the VK_KHR_swapchain and VK_KHR_surface extensions to match the style of the typename (space and color are two words, not one) (internal issue 322). * Make it clear that code:LocalInvocationID should only be applied to an input variable and normalize the language describing code:LocalInvocationID to the language for other compute shader variables in the <> section, and add normative language (internal issue 323). * Clarify in the <> section that the result pointer may be modified for specific commands, even if a runtime error is returned (internal issue 324). ----------------------------------------------------- Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <> and <> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we have committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml. ----------------------------------------------------- Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <> section (public issue 132). * Clarify that a queue family is a set of queues in the <> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright. ----------------------------------------------------- Change log for April 15, 2016 Vulkan 1.0.10 spec update: * Bump API patch number and header version number to 10 for this update. Github Issues: * Slightly tweak the <> allocator language so that an application wrapping the standard C alloc/free/realloc functions is still correct - the previous language was too strong with regards to freeing memory. Also made certain scenarios clearer - an implementation may now continue without error if an allocation failed and it is able to continue correctly (public issue 21). * Require that etext:VK_*_CREATE_SPARSE_BINDING_BIT is set when the corresponding etext:VK_*_CREATE_SPARSE_RESIDENCY_BIT is used, in the <> section and related commands flink:vkCreateBuffer and flink:vkCreateImage (public issue 84). * Update the <> chapter to clarify interactions between optional features and dynamic state for the pname:depthBiasClamp and pname:wideLines features (public issue 89). * Describe the code:WorkgroupSize builtin in the <> section, and update the <> section to further clarify how to set the number of workgroups to execute in a compute shader (public issue 145). * Use the term *image subresource* everywhere instead of *subresource*, except for the special case of *host-accessible subresource*, which may be either an image subresource or buffer range (public issue 120) * Add a note to the <> section about extensibility of structures (Public issue 165). * Fix return code flink:vkAcquireNextImageKHR when the timeout parameter is 0 to ename:VK_NOT_READY instead of ename:VK_TIMEOUT (public issue 170). * Fix typo in slink:VkLayerProperties::pname:apiVersion field (public issue 172). Internal Issues: * Fix a few minor internally-detected typos. * Minor formatting tweaks to pseudocode in the <> chapter (internal issue 179). * Fix typo in the definition of point sampling for elink:VkCullModeFlagBits (internal issue 268). ----------------------------------------------------- Change log for April 8, 2016 Vulkan 1.0.9 spec update: * Bump API patch number and header version number to 9 for this update. Github Issues: * Fix memory type preorder definition and clarify example list and source code for slink:VkMemoryRequirements and slink:VkMemoryHeap (public issue 26). * Ensure slink:VkAllocationCallbacks are properly defined (public issue 73). * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Add language allowing allocation and freeing of memory scoped to the duration of any API command in the <> section (public issue 136). * Clarify the explicit location assignment always overrides the inherited location in the <> section, even for the first member of a block (public issue 141). * Fixed references to slink:VkCommandBufferInheritanceInfo::pname:pipelineStatistics (public issue 158). * Fix name of slink:VkBufferCopy::pname:size field in validity language for flink:vkCmdCopyBuffer (public issue 162). Internal Issues: * Update GL_KHR_vulkan_glsl specification to clarify disallowance of spec-const arrays in initializers (internal issue 248). * Clarify <> section to state that user-defined variable interface must match too (internal issue 250). ----------------------------------------------------- Change log for April 1, 2016 Vulkan 1.0.8 spec update: * Bump API patch number and header version number to 8 for this update. Github Issues: * Specify in the validity language for flink:vkBeginCommandBuffer that pname:commandBuffer must not currently be pending execution (public issue 96). * Describe depth comparison using the correct temporary variable names in the <> section (public issue 100). * Clarify the order of descriptor update operations in the flink:vkUpdateDescriptorSets command (public issue 115). * Specify in the VK_KHR_swapchain extension that flink:vkAcquireNextImageKHR's pname:semaphore and pname:fence parameters cannot both be sname:VK_NULL_HANDLE (partly addresses, but does not fully close, public issue 117 / internal issue 246). * Change reference to the "lifetime" of a Vulkan command to "duration", and define the "duration" term (public issue 135). * Added valid usage language for slink:VkImageLayout to require both pname:height and pname:depth to be 1 for 1D images and pname:depth to be 1 for 2D images (public issue 137). * Fix SPIR-V example code in the <> section to properly decorate the code:InputAttachmentIndex (public issue 139). * Fix reference to nonexistent pname:imageInfo in the description of flink:VkWriteDescriptorSet to refer to pname:pImageInfo (public issue 140). Internal Issues: * Link to the fixed-function vertex chapter from the drawing chapter (internal issue 110) * Fix typo in slink:VkImageCreateInfo validity language: ptext:maxExtent.sampleCounts -> pname:sampleCounts (internal issue 249). * Explain why the non-core token etext:VK_IMAGE_LAYOUT_PRESENT_SRC_KHR is used in the example in the <> section (internal issue 251). * Attempt to clarify in the VK_KHR_android_surface extension's <> section that there is no Android-specific WSI query, and why (internal issue 252). Other Commits: * Add missing language about ename:VK_INCOMPLETE being returned from array queries when the passed array is too short, in the VK_KHR_display, VK_KHR_swapchain, and VK_KHR_surface extensions. ----------------------------------------------------- Change log for March 25, 2016 Vulkan 1.0.7 spec update: * Bump API patch number and header version number to 7 for this update. Github Issues: * Fix slink:VkSpecializationMapEntry example to avoid C/C++ strict aliasing issues (public issue 14). * Clarify the meaning of "matching" in flink:vkCmdBindDescriptorSets validity language (public issue 33). * Add stub reference pages so xrefs to not-yet-written pages do not generate 404 errors. However, the actual content of these pages still needs to be filled in as time allows (public issue 44, but does not close that issue out). * Remove incorrect validity statement for flink:vkGetImageSparseMemoryRequirements (public issue 85). * Reword the <> feature in terms of "aliasing", and clarify that it applies to bindings in the same memory object (public issue 90). * Clarify the relationship of the slink:VkPhysicalDeviceLimits pname:maxViewportDimensions and pname:viewportBoundsRange limits (public issue 92). * Specify sparse unbound texture replacement in the <> section independently of robust buffer access language (public issue 100). * Add the <> section to explain architecture constraints Vulkan has chosen to accept in order to enable portable and performant code (public issue 122). * State that an object must not be destroyed until *all* (not *any*) uses of that object have completed (public issue 123). * Minor editorial cleanup (public issues 129, 134, 146, 148). * Add validity language for layer and extension names to slink:VkDeviceCreateInfo matching that used for slink:VkInstanceCreateInfo (public issue 130). * Clean up terminology for the case when the bits set in one bitmask are a subset of the bits set in another bitmask (public issue 138). * Document that input attachments are UniformConstant not Input, in the <> section (public glslang bug 169). Internal Issues: * Add max enum values to "flag bits" enums (internal issue 136). * Clarify language around the various uses of the term "block" in the <> section (internal issue 202). * Removed "expand" dependency from groups in vk.xml and added auto-generation code in the scripts to infer it instead, to ensure consistency. This caused renaming of sname:VkColorSpaceKHR and sname:VkPresentModeKHR etext:BEGIN_RANGE (etc.) tokens, but those tokens are metadata, not part of the API, and the Vulkan WG is OK with this change. This change adds ranges to two additional enums that were missing them due to not defining the "expand" attribute (internal issue 217). * Tweak makefile to generate ref page nroff (.3) files in the right output directory, working around an a2x limitation (internal issue 223). Other Commits: * Add validity requirements for flink:vkCmdCopyQueryPoolResults pname:dstBuffer parameter. * Fix ref page build to generate .3 targets in the right output directory. ----------------------------------------------------- Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the <> section (public issue 45). * Editorial fixes for <> section (public issues 54, 59). * Clarify behavior of depth test in the <> section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which do not return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the <> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on <> diagram. Use more easily distinguished symbols in tables in the <> section. Do not require FQDNs used as layer names be encoded in lower case if not possible, in the <> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION__" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue 197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets. ----------------------------------------------------- Change log for March 4, 2016 Vulkan 1.0.5 spec update: * Bump API patch number to 5 for this update. Github Issues: * Correctly describe slink:VkPhysicalDeviceProperties pname:deviceName member as a string, not a pointer to a string. Also one typo fix for "hetereogeneous" (public issue 4). * Replace maynot: macro with may: not, and "may: or maynot:" with "may:" (public issue 4). * Clarify that redundantly setting the state of a fence or event has no effect (public issue 4). * Minor fixes to ref pages to track descriptions of memory bits that changed in the core spec. Fix name of a member in the description of sname:sname:VkPipelineMultisampleStateCreateInfo (public issues 8, 13). * Remove redundant validity statement for sname:VkGraphicsPipelineCreateInfo::pname:stageCount (public issue 14). * Fix typos in chapters 7-9 (public issue 14). * Clarify the example demonstrating the behavior of code:OpMemoryBarrier in the <> section (public issue 16). * Specify that freeing mapped memory implicitly unmaps the memory in the description of flink:vkFreeMemory (public issue 17). * Forbid allocation callbacks from calling into the API in the <> section (public issue 20). * Add missing validity rules about size being greater than 0 and offset being less than size of object. Fix flink:VkMappedMemoryRange's misinterpretation of offset (public issues 27, 31). * Add validity rule disallowing overlapping source/destination descriptors in flink:VkCopyDescriptorSet (public issue 32). * Clarify that array and matrix stride has to be a multiple of the base alignment of the array or matrix in the <> section (public issue 38). * Correct parenthesis floor nesting error in equation for <>. Clarify case of when exp' is forced to 0, avoiding log2(0) undefined problem (public issue 40). * Remove redundant statement from the code:FragDepth description in the <> section (public issue 47). * Define the clamping of the <> by linking to the slink:VkPhysicalDevice feature pname:maxSamplerLodBias (public issue 64). * Fix typo "optimal linear resources" and clarify the set of resources <> applies to (public issue 67). * Replace 'descriptor accessed by a pipeline' language for sname:VkDescriptorSetAllocateInfo with more precise phrasing about binding a descriptor set before a command that invokes work using that set (public issue 69). * tstripadj.svg contained an Inkscape tag which caused Firefox and IE 11 to fail to render it, and was illegal SVG. Generating Plain SVG from the Inkscape SVG source fixes this (public issue 70). * Fix validity for sname:VkVertexInputBindingDescription and sname:VkVertexInputAttributeDescription numbers (public issue 72). Internal Issues: * Clarify the meaning of ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT in elink:VkFormatFeatureFlagBits with respect to depth compare (internal issue 107). * Added a note explaining that ename:VK_QUEUE_TRANSFER_BIT may or may not be reported for a queue family that already supports ename:VK_QUEUE_GRAPHICS_BIT or ename:VK_QUEUE_COMPUTE_BIT as the former is a strict subset of the latter ones (internal issue 116). * Add validity language for sname:VkDescriptorSetAllocateInfo about exceeding the descriptor pool capacity (internal issue 140). * Add ename:VK_INCOMPLETE success code for flink:vkEnumeratePhysicalDevices query (internal issue 163). Other Commits: * Add the VK_NV_glsl_shader extension definitions to the API. * Update GL_KHR_vulkan_glsl with 1) origin_upper_left as default 2) specialization array constant semantics. * Corrected/updated Data Format Specification date. ----------------------------------------------------- Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users cannot currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it is the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass. ----------------------------------------------------- February 16, 2016 - Vulkan 1.0 initial public release