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Shaders: Implement depth writing in fragment shaders.
We'll write <last color output reg + 2> to gl_FragDepth.
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@ -918,7 +918,6 @@ private:
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FragmentHeader header;
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std::memcpy(&header, program_code.data(), PROGRAM_HEADER_SIZE);
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ASSERT_MSG(header.writes_depth == 0, "Depth write is unimplemented");
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ASSERT_MSG(header.writes_samplemask == 0, "Samplemask write is unimplemented");
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// Write the color outputs using the data in the shader registers, disabled
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@ -935,6 +934,12 @@ private:
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}
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}
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}
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if (header.writes_depth) {
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// The depth output is always 2 registers after the last color output, and current_reg
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// already contains one past the last color register.
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shader.AddLine("gl_FragDepth = " + regs.GetRegisterAsFloat(current_reg + 1) + ';');
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}
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}
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/**
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