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gpu: rework alpha-to-coverage validation

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This commit is contained in:
Eri the Switch
2025-04-06 19:22:59 +03:00
committed by Sam Lantinga
parent ceb9fecfc1
commit 3343cb2147
2 changed files with 97 additions and 6 deletions
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20
src/gpu/SDL_gpu.c
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@@ -827,12 +827,6 @@ SDL_GPUGraphicsPipeline *SDL_CreateGPUGraphicsPipeline(
SDL_assert_release(!"Format is not supported for color targets on this device!");
return NULL;
}
if (graphicsPipelineCreateInfo->multisample_state.enable_alpha_to_coverage &&
(IsIntegerFormat(graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].format)
|| IsCompressedFormat(graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].format))) {
SDL_assert_release(!"Format is not compatible with alpha-to-coverage!");
return NULL;
}
if (graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].blend_state.enable_blend) {
const SDL_GPUColorTargetBlendState *blend_state = &graphicsPipelineCreateInfo->target_info.color_target_descriptions[i].blend_state;
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->src_color_blendfactor, NULL)
@@ -841,6 +835,8 @@ SDL_GPUGraphicsPipeline *SDL_CreateGPUGraphicsPipeline(
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->src_alpha_blendfactor, NULL)
CHECK_BLENDFACTOR_ENUM_INVALID(blend_state->dst_alpha_blendfactor, NULL)
CHECK_BLENDOP_ENUM_INVALID(blend_state->alpha_blend_op, NULL)
// TODO: validate that format support blending?
}
}
if (graphicsPipelineCreateInfo->target_info.has_depth_stencil_target) {
@@ -854,6 +850,18 @@ SDL_GPUGraphicsPipeline *SDL_CreateGPUGraphicsPipeline(
return NULL;
}
}
if (graphicsPipelineCreateInfo->multisample_state.enable_alpha_to_coverage) {
if (graphicsPipelineCreateInfo->target_info.num_color_targets < 1) {
SDL_assert_release(!"Alpha-to-coverage enabled but no color targets present!");
return NULL;
}
if (!FormatHasAlpha(graphicsPipelineCreateInfo->target_info.color_target_descriptions[0].format)) {
SDL_assert_release(!"Format is not compatible with alpha-to-coverage!");
return NULL;
}
// TODO: validate that format supports belnding? This is only required on Metal.
}
if (graphicsPipelineCreateInfo->vertex_input_state.num_vertex_buffers > 0 && graphicsPipelineCreateInfo->vertex_input_state.vertex_buffer_descriptions == NULL) {
SDL_assert_release(!"Vertex buffer descriptions array pointer cannot be NULL!");
return NULL;

83
src/gpu/SDL_sysgpu.h
View File

@@ -438,6 +438,89 @@ static inline bool IsCompressedFormat(
}
}
static inline bool FormatHasAlpha(
SDL_GPUTextureFormat format)
{
switch (format) {
case SDL_GPU_TEXTUREFORMAT_ASTC_12x10_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x12_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x10_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x12_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x10_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_12x12_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x6_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x8_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x10_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x6_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x10_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x6_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x8_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_10x10_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x6_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x8_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x6_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x6_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_8x8_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x6_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x6_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_6x6_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x4_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x5_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x4_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x5_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x4_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_5x5_FLOAT:
case SDL_GPU_TEXTUREFORMAT_ASTC_4x4_UNORM:
case SDL_GPU_TEXTUREFORMAT_ASTC_4x4_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_ASTC_4x4_FLOAT:
// ASTC textures may or may not have alpha; return true as this is mainly intended for validation
return true;
case SDL_GPU_TEXTUREFORMAT_BC1_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC2_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC3_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC7_RGBA_UNORM:
case SDL_GPU_TEXTUREFORMAT_BC1_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_BC2_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_BC3_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_BC7_RGBA_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM:
case SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM:
case SDL_GPU_TEXTUREFORMAT_B5G5R5A1_UNORM:
case SDL_GPU_TEXTUREFORMAT_B4G4R4A4_UNORM:
case SDL_GPU_TEXTUREFORMAT_R10G10B10A2_UNORM:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_UNORM:
case SDL_GPU_TEXTUREFORMAT_A8_UNORM:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_SNORM:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_SNORM:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R32G32B32A32_FLOAT:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UINT:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_UINT:
case SDL_GPU_TEXTUREFORMAT_R32G32B32A32_UINT:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_INT:
case SDL_GPU_TEXTUREFORMAT_R16G16B16A16_INT:
case SDL_GPU_TEXTUREFORMAT_R32G32B32A32_INT:
case SDL_GPU_TEXTUREFORMAT_R8G8B8A8_UNORM_SRGB:
case SDL_GPU_TEXTUREFORMAT_B8G8R8A8_UNORM_SRGB:
return true;
default:
return false;
}
}
static inline Uint32 IndexSize(SDL_GPUIndexElementSize size)
{
return (size == SDL_GPU_INDEXELEMENTSIZE_16BIT) ? 2 : 4;