All OpenGL functions are now methods on a Context interface. The
gl.Context matches the one loaded into thread-local storage in C.
For mobile apps, the context is owned by an app.App. For now, it is
provided through the events channel on a lifecycle event. Long-term,
it should probably be available by a method on app.App, but this is
inherently racey with our current use of a channel to deliver events.
Shiny-based programs will have a gl.Context associated with a each
shiny.Window. The expectation is each Window will have different
contexts, allowing them to draw separately.
Change-Id: Ie09986fb74e493129f2ea542a151c95c6fa29812
Reviewed-on: https://go-review.googlesource.com/13431
Reviewed-by: Nigel Tao <nigeltao@golang.org>
It is now the user's job to track the lifetime of a glutil.Image
relative to a (currently implicit, soon to be explicit) GL context.
This is an attempt to move glutil.Image closer to the model for
buffers and textures in shiny. Long-term, I would like to adopt that
model, and this is a step in that direction. It also makes the
introduction of *gl.Context possible, so this is a pre-req for
cl/13431.
Change-Id: I8e6855211b3e67c97d5831c5c4e443e857c83d50
Reviewed-on: https://go-review.googlesource.com/14795
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Hoping to learn more so I can debug or replicate the darwin/amd64
builder failure, which is not creating a GL context.
Change-Id: I9f2fe54fbd9a072c65cd37c3b711554d4c71171f
Reviewed-on: https://go-review.googlesource.com/13693
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Embedding is more trouble than it's worth. For example, the image/draw
package will pick the slow code paths for an embedded *image.RGBA.
Change-Id: I64bd20a80814b838850950c05dd8257e5901aef7
Reviewed-on: https://go-review.googlesource.com/12567
Reviewed-by: David Crawshaw <crawshaw@golang.org>
In the long term, a lot of this package should be removed in favor of the
golang.org/x/image/math/f32 package. The latter is the common location for
matrix types shared across graphics libraries. For example, the
golang.org/x/image/draw package refers to golang.org/x/image/math/f64.
Change-Id: I9d7ccd3cb35912e0d9dc5bd46c919516ea840340
Reviewed-on: https://go-review.googlesource.com/11856
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
