Vulkan-Docs/appendices/VK_EXT_fragment_density_map.txt

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include::meta/VK_EXT_fragment_density_map.txt[]
*Last Modified Date*::
2018-09-25
*Interactions and External Dependencies*::
- This extension requires the
Change log for August 17, 2019 Vulkan 1.1.120 spec update: * Update release number to 120. Github Issues: * Add slink:VkAccelerationStructureTypeNV explicitly to extension XML for `<<VK_NV_ray_tracing>>` (public issue 848). * Add missing valid usage statements for feature flags in slink:VkCommandBufferInheritanceInfo (public pull request 1017). Internal Issues: * Clarify behavior of non-premultiplied destination colors for `<<VK_EXT_blend_operation_advanced>>` prior to the definition of slink:VkBlendOverlapEXT (internal issue 1766). * Fix the confusing phrasing "`no other queue must: be (doing something)`" for flink:vkQueuePresentKHR, flink:vkQueueSubmit, and flink:vkQueueBindSparse (internal issue 1774). * Add `<<VK_EXT_validation_features>>` flag to enable best practices checks, which will soon be available in the validation layer (internal issue 1779). * Specify allowed characters for VUID tag name components in the style guide (internal issue 1788). * Update links to SPIR-V extension specifications, and parameterize their markup in case the URLs change in the future (internal issue 1797). * Fix an off-by-one error in the valid usage statement for slink:VkPipelineExecutableInfoKHR (internal merge request 3303). * Clean up markup indentation not matching the style guide (internal merge request 3314). * Minor script updates to allow refpage aliases, generate a dynamic TOC for refpages, generate Apache rewrite rules for aliases, open external links from refpages in a new window, and synchronize with the OpenCL scripts. This will shortly enable a paned navigation setup for refpages, similar to the OpenCL 2.2 refpages (internal merge request 3322). * Script updates to add tests to the checker, refactor and reformat code, generate better text for some valid usage statements, use more Pythonic idioms, and synchronize with the OpenXR scripts (internal merge request 3239). * Script updates and minor fixes in spec language to not raise checker errors for refpage markup of pages not existing in the API, such as VKAPI_NO_STDINT_H. Remove corresponding suppression of some check_spec_links.py tests from .gitlab-ci.yml and 'allchecks' target (internal merge request 3315).
2019-08-17 15:33:21 -07:00
{spirv}/EXT/SPV_EXT_fragment_invocation_density.html[`SPV_EXT_fragment_invocation_density`]
SPIR-V extension.
*Contributors*::
- Matthew Netsch, Qualcomm Technologies, Inc.
- Robert VanReenen, Qualcomm Technologies, Inc.
- Jonathan Wicks, Qualcomm Technologies, Inc.
- Tate Hornbeck, Qualcomm Technologies, Inc.
- Sam Holmes, Qualcomm Technologies, Inc.
- Jeff Leger, Qualcomm Technologies, Inc.
- Jan-Harald Fredriksen, ARM
- Jeff Bolz, NVIDIA
- Pat Brown, NVIDIA
- Daniel Rakos, AMD
- Piers Daniell, NVIDIA
This extension allows an application to specify areas of the render target
where the fragment shader may be invoked fewer times.
These fragments are broadcasted out to multiple pixels to cover the render
target.
The primary use of this extension is to reduce workloads in areas where
lower quality may not be perceived such as the distorted edges of a lens or
the periphery of a user's gaze.
=== New Object Types
None.
=== New Enum Constants
* Extending elink:VkAccessFlagBits:
** ename:VK_ACCESS_FRAGMENT_DENSITY_MAP_READ_BIT_EXT
* Extending elink:VkFormatFeatureFlagBits:
** ename:VK_FORMAT_FEATURE_FRAGMENT_DENSITY_MAP_BIT_EXT
* Extending elink:VkImageCreateFlagBits:
** ename:VK_IMAGE_CREATE_SUBSAMPLED_BIT_EXT
* Extending elink:VkImageLayout:
** ename:VK_IMAGE_LAYOUT_FRAGMENT_DENSITY_MAP_OPTIMAL_EXT
* Extending elink:VkImageUsageFlagBits:
** ename:VK_IMAGE_USAGE_FRAGMENT_DENSITY_MAP_BIT_EXT
* Extending elink:VkImageViewCreateFlagBits:
** ename:VK_IMAGE_VIEW_CREATE_FRAGMENT_DENSITY_MAP_DYNAMIC_BIT_EXT
* Extending elink:VkPipelineStageFlagBits:
** ename:VK_PIPELINE_STAGE_FRAGMENT_DENSITY_PROCESS_BIT_EXT
* Extending elink:VkSamplerCreateFlagBits:
** ename:VK_SAMPLER_CREATE_SUBSAMPLED_BIT_EXT
** ename:VK_SAMPLER_CREATE_SUBSAMPLED_COARSE_RECONSTRUCTION_BIT_EXT
* Extending elink:VkStructureType:
** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_FEATURES_EXT
** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_PROPERTIES_EXT
** ename:VK_STRUCTURE_TYPE_RENDER_PASS_FRAGMENT_DENSITY_MAP_CREATE_INFO_EXT
=== New Enums
None.
=== New Structures
* slink:VkPhysicalDeviceFragmentDensityMapFeaturesEXT
* slink:VkPhysicalDeviceFragmentDensityMapPropertiesEXT
* slink:VkRenderPassFragmentDensityMapCreateInfoEXT
=== New Functions
None.
=== New or Modified Built-In Variables
* <<interfaces-builtin-variables-fraginvocationcount,code:FragInvocationCountEXT>>
* <<interfaces-builtin-variables-fragsize,code:FragSizeEXT>>
=== New Variable Decorations
None.
=== New SPIR-V Capabilities
* <<spirvenv-capabilities-table-fragmentdensity,FragmentDensityEXT>>
=== Version History
* Revision 1, 2018-09-25 (Matthew Netsch)
- Initial version