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[Feat, Test] (ShaderTranspiler, DirectGLES): split a non-core buffer image by its subscript instead of losing the stage

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swung0x48
2026-08-22 04:30:06 -04:00
parent 7eac33d17b
commit 5e29e7d266
10 changed files with 705 additions and 37 deletions
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MobileGL/MG_Backend/DirectGLES/DirectGLES.cpp
+20 -7
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@@ -1483,14 +1483,27 @@ namespace MobileGL::MG_Backend::DirectGLES {
// already calls that undefined, and inventing a carrier for it would only make the
// out-of-class read wider.
//
// A BUFFER texture is excluded on both sides: it has no storage of its own to widen
// (its texels are the application's buffer object), so WidenImageFormatsPass declines
// every buffer image and the bind must decline with it, or the driver would be handed
// a carrier the shader never addressed. See the Dim::Buffer guard there for the
// 32-byte GL_RG32F measurement that pinned it.
// A BUFFER texture is excluded from the WIDENING on both sides: it has no storage of
// its own to widen (its texels are the application's buffer object), so
// WidenImageFormatsPass declines to widen every buffer image and the bind must decline
// with it, or the driver would be handed a carrier the shader never addressed. See the
// Dim::Buffer guard there for the 32-byte GL_RG32F measurement that pinned it.
//
// What a buffer image takes instead is the SPLIT, which is the same three-layer move
// through a different door: the glTexBuffer view above and the bind below both name
// the single-channel base format, and the shader subscripts it two components per
// original texel. Same gate on both sides, so the two cannot disagree.
GLenum bindFormat = imageBinding.Format;
if (imageBinding.Texture->GetTarget() != TextureTarget::TextureBuffer &&
TextureImpl::GetImageBindableStorageWidening(imageBinding.Texture->GetFormat())) {
if (imageBinding.Texture->GetTarget() == TextureTarget::TextureBuffer) {
if (TextureImpl::GetImageBindableBufferSplitFormat(imageBinding.Texture->GetFormat()) !=
GL_UNKNOWN_MGL) {
if (const GLenum boundFormatSplit = TextureImpl::GetImageBindableBufferSplitFormat(
MG_Util::ConvertGLEnumToTextureInternalFormat(imageBinding.Format));
boundFormatSplit != GL_UNKNOWN_MGL) {
bindFormat = boundFormatSplit;
}
}
} else if (TextureImpl::GetImageBindableStorageWidening(imageBinding.Texture->GetFormat())) {
const auto boundFormatWidening = TextureImpl::GetImageBindableStorageWidening(
MG_Util::ConvertGLEnumToTextureInternalFormat(imageBinding.Format));
if (boundFormatWidening) {