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[vk, opengl] recognize and use ETC2 (if available) textures natively (#3237)
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this makes it so VK and OGL backends map the NVIDIA's ETC2 into VK_FORMAT_ETC-whatever and GL_ETC-whatever remaps, instead of using the default fallback for AR8G8B8. in short, just make the ETC2 textures be submitted as ETC2 instead of being submit as A8R8G8B8.

Signed-off-by: lizzie lizzie@eden-emu.dev

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3237
Reviewed-by: Ghost <>
Reviewed-by: crueter <crueter@eden-emu.dev>
This commit is contained in:
lizzie 2026-05-15 22:08:09 +02:00 • committed by crueter
parent 2f0f8a979c
commit 4d49341918
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GPG key ID: 425ACD2D4830EBC6
6 changed files with 60 additions and 208 deletions
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11
src/video_core/renderer_vulkan/maxwell_to_vk.cpp
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@ -217,6 +217,12 @@ FormatInfo SurfaceFormat(const Device& device, FormatType format_type, bool with
SURFACE_FORMAT_ELEM(VK_FORMAT_ASTC_6x5_UNORM_BLOCK, 0, ASTC_2D_6X5_UNORM) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ASTC_6x5_SRGB_BLOCK, 0, ASTC_2D_6X5_SRGB) \
SURFACE_FORMAT_ELEM(VK_FORMAT_E5B9G9R9_UFLOAT_PACK32, 0, E5B9G9R9_FLOAT) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK, 0, ETC2_RGB_UNORM) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK, 0, ETC2_RGBA_UNORM) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK, 0, ETC2_RGB_PTA_UNORM) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK, 0, ETC2_RGB_SRGB) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK, 0, ETC2_RGBA_SRGB) \
SURFACE_FORMAT_ELEM(VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK, 0, ETC2_RGB_PTA_SRGB) \
/* Depth formats */ \
SURFACE_FORMAT_ELEM(VK_FORMAT_D32_SFLOAT, usage_attachable, D32_FLOAT) \
SURFACE_FORMAT_ELEM(VK_FORMAT_D16_UNORM, usage_attachable, D16_UNORM) \
@ -253,8 +259,8 @@ FormatInfo SurfaceFormat(const Device& device, FormatType format_type, bool with
break;
}
}
// Transcode on hardware that doesn't support BCn natively
if (!device.IsOptimalBcnSupported() && VideoCore::Surface::IsPixelFormatBCn(pixel_format)) {
// Transcode on hardware that doesn't support BCn natively
if (pixel_format == PixelFormat::BC4_SNORM) {
tuple.format = VK_FORMAT_R8_SNORM;
} else if (pixel_format == PixelFormat::BC4_UNORM) {
@ -270,6 +276,9 @@ FormatInfo SurfaceFormat(const Device& device, FormatType format_type, bool with
} else {
tuple.format = VK_FORMAT_A8B8G8R8_UNORM_PACK32;
}
} else if (!device.IsOptimalEtc2Supported() && VideoCore::Surface::IsPixelFormatETC2(pixel_format)) {
// Transcode on hardware that doesn't support ETC2 natively
tuple.format = is_srgb ? VK_FORMAT_A8B8G8R8_SRGB_PACK32 : VK_FORMAT_A8B8G8R8_UNORM_PACK32;
}
bool const attachable = (tuple.usage & usage_attachable) != 0;
bool const storage = (tuple.usage & usage_storage) != 0;