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PostProcessing/slang: Flip textures if using OpenGL

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Fixes them being sampled upside down.
This commit is contained in:
Stenzek
2025-11-11 23:31:43 +10:00
parent 3a1e8fe7a1
commit fc97cf514c
1 changed files with 26 additions and 2 deletions
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28
src/util/postprocessing_shader_slang.cpp
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@@ -1472,13 +1472,37 @@ bool PostProcessing::SlangShader::UploadLUTTextures(Error* error)
Assert(!tex.needs_feedback);
Image image;
if (!image.LoadFromFile(tex.path.c_str(), error) ||
!(tex.texture = g_gpu_device->FetchAndUploadTextureImage(image, GPUTexture::Flags::None, error)))
if (!image.LoadFromFile(tex.path.c_str(), error))
{
Error::AddPrefixFmt(error, "Failed to load LUT texture from file '{}': ", Path::GetFileName(tex.path));
return false;
}
// Flip textures in GL so the texture coordinates match what we're rendering in screen space.
if (g_gpu_device->UsesLowerLeftOrigin())
{
// Have to decompress if compressed.
if (Image::IsCompressedFormat(image.GetFormat()))
{
std::optional<Image> decompressed = image.ConvertToRGBA8(error);
if (!decompressed.has_value())
{
Error::AddPrefixFmt(error, "Failed to decompress LUT texture from file '{}': ", Path::GetFileName(tex.path));
return false;
}
image = std::move(decompressed.value());
}
image.FlipY();
}
if (!(tex.texture = g_gpu_device->FetchAndUploadTextureImage(image, GPUTexture::Flags::None, error)))
{
Error::AddPrefixFmt(error, "Failed to upload LUT texture from file '{}': ", Path::GetFileName(tex.path));
return false;
}
// Use clamp to border for LUTs by default.
GPUSampler::Config sampler_config =
tex.linear_filter ? GPUSampler::GetLinearConfig() : GPUSampler::GetNearestConfig();