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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;