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GPU: Add enable_depth_clip to RasterizerState (#10964)

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Caleb Cornett 2024-09-27 11:18:54 -05:00 committed by GitHub
parent 04bb105d09
commit 5ff6e8d522
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GPG Key ID: B5690EEEBB952194
5 changed files with 22 additions and 4 deletions
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7
include/SDL3/SDL_gpu.h
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@ -1355,6 +1355,11 @@ typedef struct SDL_GPUTransferBufferCreateInfo
* A structure specifying the parameters of the graphics pipeline rasterizer
* state.
*
* NOTE: Some backend APIs (D3D11/12) will enable depth clamping even if
* enable_depth_clip is true. If you rely on this clamp+clip behavior,
* consider enabling depth clip and then manually clamping depth in your
* fragment shaders on Metal and Vulkan.
*
* \since This struct is available since SDL 3.0.0
*
* \sa SDL_GPUGraphicsPipelineCreateInfo
@ -1368,9 +1373,9 @@ typedef struct SDL_GPURasterizerState
float depth_bias_clamp; /**< The maximum depth bias of a fragment. */
float depth_bias_slope_factor; /**< A scalar factor applied to a fragment's slope in depth calculations. */
bool enable_depth_bias; /**< true to bias fragment depth values. */
bool enable_depth_clip; /**< true to enable depth clip, false to enable depth clamp. */
Uint8 padding1;
Uint8 padding2;
Uint8 padding3;
} SDL_GPURasterizerState;
/**

2
src/gpu/d3d11/SDL_gpu_d3d11.c
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@ -1356,7 +1356,7 @@ static ID3D11RasterizerState *D3D11_INTERNAL_FetchRasterizerState(
rasterizerDesc.CullMode = SDLToD3D11_CullMode[rasterizerState.cull_mode];
rasterizerDesc.DepthBias = SDL_lroundf(rasterizerState.depth_bias_constant_factor);
rasterizerDesc.DepthBiasClamp = rasterizerState.depth_bias_clamp;
rasterizerDesc.DepthClipEnable = TRUE;
rasterizerDesc.DepthClipEnable = rasterizerState.enable_depth_clip;
rasterizerDesc.FillMode = (rasterizerState.fill_mode == SDL_GPU_FILLMODE_FILL) ? D3D11_FILL_SOLID : D3D11_FILL_WIREFRAME;
rasterizerDesc.FrontCounterClockwise = (rasterizerState.front_face == SDL_GPU_FRONTFACE_COUNTER_CLOCKWISE);
rasterizerDesc.MultisampleEnable = TRUE; // only applies to MSAA render targets

2
src/gpu/d3d12/SDL_gpu_d3d12.c
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@ -2447,7 +2447,7 @@ static bool D3D12_INTERNAL_ConvertRasterizerState(SDL_GPURasterizerState rasteri
desc->SlopeScaledDepthBias = 0.0f;
}
desc->DepthClipEnable = TRUE;
desc->DepthClipEnable = rasterizerState.enable_depth_clip;
desc->MultisampleEnable = FALSE;
desc->AntialiasedLineEnable = FALSE;
desc->ForcedSampleCount = 0;

11
src/gpu/metal/SDL_gpu_metal.m
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@ -368,6 +368,16 @@ static MTLColorWriteMask SDLToMetal_ColorWriteMask(
return result;
}
static MTLDepthClipMode SDLToMetal_DepthClipMode(
bool enableDepthClip
) {
if (enableDepthClip) {
return MTLDepthClipModeClip;
} else {
return MTLDepthClipModeClamp;
}
}
// Structs
typedef struct MetalTexture
@ -2311,6 +2321,7 @@ static void METAL_BindGraphicsPipeline(
[metalCommandBuffer->renderEncoder setTriangleFillMode:SDLToMetal_PolygonMode[metalGraphicsPipeline->rasterizerState.fill_mode]];
[metalCommandBuffer->renderEncoder setCullMode:SDLToMetal_CullMode[metalGraphicsPipeline->rasterizerState.cull_mode]];
[metalCommandBuffer->renderEncoder setFrontFacingWinding:SDLToMetal_FrontFace[metalGraphicsPipeline->rasterizerState.front_face]];
[metalCommandBuffer->renderEncoder setDepthClipMode:SDLToMetal_DepthClipMode(metalGraphicsPipeline->rasterizerState.enable_depth_clip)];
[metalCommandBuffer->renderEncoder
setDepthBias:((rast->enable_depth_bias) ? rast->depth_bias_constant_factor : 0)
slopeScale:((rast->enable_depth_bias) ? rast->depth_bias_slope_factor : 0)

4
src/gpu/vulkan/SDL_gpu_vulkan.c
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@ -6175,7 +6175,7 @@ static SDL_GPUGraphicsPipeline *VULKAN_CreateGraphicsPipeline(
rasterizationStateCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
rasterizationStateCreateInfo.pNext = NULL;
rasterizationStateCreateInfo.flags = 0;
rasterizationStateCreateInfo.depthClampEnable = VK_FALSE;
rasterizationStateCreateInfo.depthClampEnable = !createinfo->rasterizer_state.enable_depth_clip;
rasterizationStateCreateInfo.rasterizerDiscardEnable = VK_FALSE;
rasterizationStateCreateInfo.polygonMode = SDLToVK_PolygonMode(
renderer,
@ -11030,6 +11030,8 @@ static Uint8 VULKAN_INTERNAL_CreateLogicalDevice(
desiredDeviceFeatures.independentBlend = VK_TRUE;
desiredDeviceFeatures.samplerAnisotropy = VK_TRUE;
desiredDeviceFeatures.imageCubeArray = VK_TRUE;
desiredDeviceFeatures.depthClamp = VK_TRUE;
desiredDeviceFeatures.shaderClipDistance = VK_TRUE;
if (haveDeviceFeatures.fillModeNonSolid) {
desiredDeviceFeatures.fillModeNonSolid = VK_TRUE;