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Merge pull request #99551 from DarioSamo/fragment-density-map

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Implement Fragment density map support.
This commit is contained in:
Rémi Verschelde
2025-03-28 14:31:19 +01:00
parent aeeea52a93 76d709be74
commit 408d07109b
21 changed files with 738 additions and 360 deletions
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9
servers/rendering/renderer_rd/shaders/effects/vrs.glsl
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@@ -59,7 +59,11 @@ layout(location = 0) in vec2 uv_interp;
layout(set = 0, binding = 0) uniform sampler2D source_color;
#endif /* USE_MULTIVIEW */
#ifdef SPLIT_RG
layout(location = 0) out vec2 frag_color;
#else
layout(location = 0) out uint frag_color;
#endif
layout(push_constant, std430) uniform Params {
float max_texel_factor;
@@ -79,6 +83,10 @@ void main() {
// Input is standardized. R for X, G for Y, 0.0 (0) = 1, 0.33 (85) = 2, 0.66 (170) = 3, 1.0 (255) = 8
vec4 color = textureLod(source_color, uv, 0.0);
#ifdef SPLIT_RG
// Density map for VRS according to VK_EXT_fragment_density_map, we can use as is.
frag_color = max(vec2(1.0f) - color.rg, vec2(1.0f / 255.0f));
#else
// Output image shading rate image for VRS according to VK_KHR_fragment_shading_rate.
color.r = clamp(floor(color.r * params.max_texel_factor + 0.1), 0.0, params.max_texel_factor);
color.g = clamp(floor(color.g * params.max_texel_factor + 0.1), 0.0, params.max_texel_factor);
@@ -94,4 +102,5 @@ void main() {
// Encode to frag_color;
frag_color = int(color.r + 0.1) << 2;
frag_color += int(color.g + 0.1);
#endif
}