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HLSL: Support dual-source blending.

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This commit is contained in:
Hans-Kristian Arntzen 2019-01-11 10:03:45 +01:00
parent a57b93f6b7
commit a365ff17bd
4 changed files with 64 additions and 1 deletions
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23
reference/opt/shaders-hlsl/frag/dual-source-blending.frag Normal file
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@ -0,0 +1,23 @@
static float4 FragColor0;
static float4 FragColor1;
struct SPIRV_Cross_Output
{
float4 FragColor0 : SV_Target0;
float4 FragColor1 : SV_Target1;
};
void frag_main()
{
FragColor0 = 1.0f.xxxx;
FragColor1 = 2.0f.xxxx;
}
SPIRV_Cross_Output main()
{
frag_main();
SPIRV_Cross_Output stage_output;
stage_output.FragColor0 = FragColor0;
stage_output.FragColor1 = FragColor1;
return stage_output;
}

23
reference/shaders-hlsl/frag/dual-source-blending.frag Normal file
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@ -0,0 +1,23 @@
static float4 FragColor0;
static float4 FragColor1;
struct SPIRV_Cross_Output
{
float4 FragColor0 : SV_Target0;
float4 FragColor1 : SV_Target1;
};
void frag_main()
{
FragColor0 = 1.0f.xxxx;
FragColor1 = 2.0f.xxxx;
}
SPIRV_Cross_Output main()
{
frag_main();
SPIRV_Cross_Output stage_output;
stage_output.FragColor0 = FragColor0;
stage_output.FragColor1 = FragColor1;
return stage_output;
}

10
shaders-hlsl/frag/dual-source-blending.frag Normal file
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@ -0,0 +1,10 @@
#version 450
layout(location = 0, index = 0) out vec4 FragColor0;
layout(location = 0, index = 1) out vec4 FragColor1;
void main()
{
FragColor0 = vec4(1.0);
FragColor1 = vec4(2.0);
}

9
spirv_hlsl.cpp
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@ -805,7 +805,14 @@ void CompilerHLSL::emit_interface_block_in_struct(const SPIRVariable &var, unord
bool legacy = hlsl_options.shader_model <= 30;
if (execution.model == ExecutionModelFragment && var.storage == StorageClassOutput)
{
binding = join(legacy ? "COLOR" : "SV_Target", get_decoration(var.self, DecorationLocation));
// Dual-source blending is achieved in HLSL by emitting to SV_Target0 and 1.
uint32_t index = get_decoration(var.self, DecorationIndex);
uint32_t location = get_decoration(var.self, DecorationLocation);
if (index != 0 && location != 0)
SPIRV_CROSS_THROW("Dual-source blending is only supported on MRT #0 in HLSL.");
binding = join(legacy ? "COLOR" : "SV_Target", location + index);
use_location_number = false;
if (legacy) // COLOR must be a four-component vector on legacy shader model targets (HLSL ERR_COLOR_4COMP)
type.vecsize = 4;