AuroraMiddleware/SPIRV-Cross
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Adjust HLSL vertex shader positions

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Pixel positions (because of D3D9 half-pixel positions)
and depth (adjust to -1/1).
Optionally using D3D11 pixel positions and no depth
adjustment still to do.
This commit is contained in:
Robert Konrad 2016-08-16 00:27:39 +02:00
parent a896868215
commit 95a716f7de
1 changed files with 13 additions and 0 deletions
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13
spirv_hlsl.cpp
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@ -209,6 +209,12 @@ void CompilerHLSL::emit_resources()
bool emitted = false;
if (execution.model == ExecutionModelVertex)
{
statement("uniform float4 gl_HalfPixel;");
emitted = true;
}
// Output Uniform Constants (values, samplers, images, etc).
for (auto &id : ids)
{
@ -442,6 +448,13 @@ void CompilerHLSL::emit_hlsl_entry_point()
}
}
if (execution.model == ExecutionModelVertex)
{
statement("output.gl_Position.x = output.gl_Position.x - gl_HalfPixel.x * output.gl_Position.w;");
statement("output.gl_Position.y = output.gl_Position.y + gl_HalfPixel.y * output.gl_Position.w;");
statement("output.gl_Position.z = (output.gl_Position.z + output.gl_Position.w) * 0.5;");
}
statement("return output;");
end_scope();