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Bug 1882318 - Add some documentation to quad shaders. r=gfx-reviewers,gw

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Differential Revision: https://phabricator.services.mozilla.com/D202831
This commit is contained in:
Nicolas Silva 2024-02-28 08:15:40 +00:00
parent 96a14dfdfb
commit 63aeff49c1
3 changed files with 32 additions and 0 deletions
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28
gfx/wr/webrender/res/ps_quad.glsl
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@ -2,12 +2,40 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/// The common infrastructure for ps_quad_* shaders.
///
/// # Memory layout
///
/// The diagram below shows the the various pieces of data fectched in the vertex shader:
///
///```ascii
/// (int gpu buffer)
/// +---------------+ (sGpuCache)
/// (instance-step vertex attr) | Int header | +-----------+
/// +-----------------------------+ | | | Transform |
/// | Quad instance (uvec4) | +--> | transform id +--> +-----------+
/// | | | | z id |
/// | x: int prim address +---+ +---------------+ (float gpu buffer)
/// | y: float prim address +--------------------------> +-----------+--------------+-+-+
/// | z: quad flags | (sGpuCache) | Quad Prim | Quad Segment | | |
/// | edge flags | +--------------------+ | | | | |
/// | part index | | Picture task | | bounds | rect | | |
/// | segment index | | | | clip | uv rect | | |
/// | w: picture task address +--> | task rect | | color | | | |
/// +-----------------------------+ | device pixel scale | +-----------+--------------+-+-+
/// | content origin |
/// +--------------------+
///```
#define WR_FEATURE_TEXTURE_2D
#include shared,rect,transform,render_task,gpu_buffer
flat varying mediump vec4 v_color;
flat varying mediump vec4 v_uv_sample_bounds;
// x: (in ps_quad_textured) has edge flags
// y: has uv rect
// z: (in ps_quad_textured) sample as mask
flat varying lowp ivec4 v_flags;
varying highp vec2 v_uv;

2
gfx/wr/webrender/res/ps_quad_mask.glsl
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@ -2,6 +2,8 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/// This shader applies a (rounded) rectangle mask to the content of the framebuffer.
#include ps_quad,ellipse
varying highp vec4 vClipLocalPos;

2
gfx/wr/webrender/res/ps_quad_textured.glsl
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@ -2,6 +2,8 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/// This shader renders solid colors or simple images in a color or alpha target.
#include ps_quad
#ifndef SWGL_ANTIALIAS