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Bug 1688303 - implement SWGL fast-path for cs_scale. r=jrmuizel

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Differential Revision: https://phabricator.services.mozilla.com/D102801
This commit is contained in:
Lee Salzman 2021-01-22 23:23:22 +00:00
parent 7dc8c1a190
commit cd4ccd90f8
1 changed files with 25 additions and 5 deletions
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30
gfx/wr/webrender/res/cs_scale.glsl
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@ -4,7 +4,8 @@
#include shared,prim_shared
varying vec3 vUv;
varying vec2 vUv;
flat varying float vUvLayer;
flat varying vec4 vUvRect;
#ifdef WR_VERTEX_SHADER
@ -24,13 +25,13 @@ void main(void) {
vec2 texture_size = vec2(textureSize(sColor0, 0));
#endif
vUv.z = float(aScaleSourceLayer);
vUvLayer = float(aScaleSourceLayer);
vUvRect = vec4(src_rect.p0 + vec2(0.5),
src_rect.p0 + src_rect.size - vec2(0.5)) / texture_size.xyxy;
vec2 pos = aScaleTargetRect.xy + aScaleTargetRect.zw * aPosition.xy;
vUv.xy = (src_rect.p0 + src_rect.size * aPosition.xy) / texture_size;
vUv = (src_rect.p0 + src_rect.size * aPosition.xy) / texture_size;
gl_Position = uTransform * vec4(pos, 0.0, 1.0);
}
@ -40,8 +41,27 @@ void main(void) {
#ifdef WR_FRAGMENT_SHADER
void main(void) {
vec2 st = clamp(vUv.xy, vUvRect.xy, vUvRect.zw);
oFragColor = TEX_SAMPLE(sColor0, vec3(st, vUv.z));
vec2 st = clamp(vUv, vUvRect.xy, vUvRect.zw);
oFragColor = TEX_SAMPLE(sColor0, vec3(st, vUvLayer));
}
#ifdef SWGL
void swgl_drawSpanRGBA8() {
if (!swgl_isTextureRGBA8(sColor0)) {
return;
}
int layer = swgl_textureLayerOffset(sColor0, vUvLayer);
vec2 uv = swgl_linearQuantize(sColor0, vUv);
vec2 min_uv = swgl_linearQuantize(sColor0, vUvRect.xy);
vec2 max_uv = swgl_linearQuantize(sColor0, vUvRect.zw);
vec2 step_uv = swgl_linearQuantizeStep(sColor0, swgl_interpStep(vUv));
while (swgl_SpanLength > 0) {
swgl_commitTextureLinearRGBA8(sColor0, clamp(uv, min_uv, max_uv), layer);
uv += step_uv;
}
}
#endif
#endif