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Merge pull request #4092 from Morph1984/image-bindings

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gl_device: Reserve 4 image bindings for fragment stage
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Rodrigo Locatti 2020-06-18 04:59:48 -03:00 committed by GitHub
parent 1394a581f2 e2f5d16540
commit edb2114bac
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1 changed files with 14 additions and 6 deletions
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20
src/video_core/renderer_opengl/gl_device.cpp
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@ -123,16 +123,24 @@ std::array<Device::BaseBindings, Tegra::Engines::MaxShaderTypes> BuildBaseBindin
u32 num_images = GetInteger<u32>(GL_MAX_IMAGE_UNITS);
u32 base_images = 0;
// Reserve more image bindings on fragment and vertex stages.
// GL_MAX_IMAGE_UNITS is guaranteed by the spec to have a minimum value of 8.
// Due to the limitation of GL_MAX_IMAGE_UNITS, reserve at least 4 image bindings on the
// fragment stage, and at least 1 for the rest of the stages.
// So far games are observed to use 1 image binding on vertex and 4 on fragment stages.
// Reserve at least 4 image bindings on the fragment stage.
bindings[4].image =
Extract(base_images, num_images, num_images / NumStages + 2, LimitImages[4]);
bindings[0].image =
Extract(base_images, num_images, num_images / NumStages + 1, LimitImages[0]);
Extract(base_images, num_images, std::max(4U, num_images / NumStages), LimitImages[4]);
// This is guaranteed to be at least 1.
const u32 total_extracted_images = num_images / (NumStages - 1);
// Reserve the other image bindings.
const u32 total_extracted_images = num_images / (NumStages - 2);
for (std::size_t i = 2; i < NumStages; ++i) {
for (std::size_t i = 0; i < NumStages; ++i) {
const std::size_t stage = stage_swizzle[i];
if (stage == 4) {
continue;
}
bindings[stage].image =
Extract(base_images, num_images, total_extracted_images, LimitImages[stage]);
}