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[vk] Degrade HDR Format to LDR

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This commit is contained in:
CamilleLaVey 2025-11-15 16:12:44 -04:00
parent dcf9483b0b
commit 46df717f7c
1 changed files with 9 additions and 1 deletions
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10
src/video_core/vulkan_common/vulkan_device.cpp
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@ -92,8 +92,16 @@ constexpr std::array VK_FORMAT_A4B4G4R4_UNORM_PACK16{
// B10G11R11_UFLOAT (R11G11B10F) - PRIMARY HDR format for Nintendo Switch
// Nintendo Switch hardware validation: FULL support (COLOR_ATTACHMENT + STORAGE_IMAGE + BLEND)
// Reference: vp_gpuinfo_nintendo_switch_v2_495_0_0_0 - All required feature bits present
//
// Fallback strategy: Degrade to LDR instead of expensive HDR emulation
// - RGBA8 UNORM/SRGB: Universal support, 32-bit (same size as B10G11R11), acceptable quality
// - RGB10A2: Better precision if available, still 32-bit
// - RGBA16F: Last resort only if RGB8 variants fail (should never happen)
constexpr std::array B10G11R11_UFLOAT_PACK32{
VK_FORMAT_R16G16B16A16_SFLOAT, // Fallback: RGBA16F (4x memory, slower, but universally supported)
VK_FORMAT_A8B8G8R8_UNORM_PACK32, // Primary fallback: RGBA8 LDR (32-bit, universal)
VK_FORMAT_A2B10G10R10_UNORM_PACK32, // Better precision: RGB10A2 (32-bit, common)
VK_FORMAT_A8B8G8R8_SRGB_PACK32, // sRGB variant (for gamma-correct fallback)
VK_FORMAT_R16G16B16A16_SFLOAT, // Emergency fallback: RGBA16F (64-bit, should never reach)
VK_FORMAT_UNDEFINED,
};