Fix OpImageSampleProjDref

Divide Dref by the projection coordinate. The SPIR-V spec states that "Dref /q is the depth-comparison reference value." Bug b/129523279 Tests: dEQP-VK.glsl.texture_functions.textureproj.* Change-Id: Ib1c4ad09f829b84b6b1065ff604fe88f8b1c1426 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31693 Presubmit-Ready: Nicolas Capens <nicolascapens@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com> Reviewed-by: Chris Forbes <chrisforbes@google.com> Tested-by: Nicolas Capens <nicolascapens@google.com>

Fix OpImageSampleProjDref
2f3d8f52 · Nicolas Capens · Nicolas Capens · b188cf9e · 2f3d8f52
Commit 2f3d8f52 authored May 17, 2019 by Nicolas Capens Committed by Nicolas Capens May 18, 2019
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SpirvShader.cpp src/Pipeline/SpirvShader.cpp +10 -1

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--- a/src/Pipeline/SpirvShader.cpp
+++ b/src/Pipeline/SpirvShader.cpp
@@ -4768,7 +4768,16 @@ namespace sw
 		if(instruction.isDref())
 		{
 			auto drefValue = GenericValue(this, state->routine, insn.word(5));
-			in[i] = drefValue.Float(0);
+			if(instruction.isProj())
+			{
+				in[i] = drefValue.Float(0) / coordinate.Float(coordinates);  // TODO(b/129523279): Optimize using reciprocal.
+			}
+			else
+			{
+				in[i] = drefValue.Float(0);
+			}
 			i++;
 		}