commit 017dfff534a5c0aaf85fd17c0f2e692e3cdde4f3
author Chris Forbes <chrisforbes@google.com> Mon Sep 09 17:00:47 2019 -0700
committer Chris Forbes <chrisforbes@google.com> Wed Sep 18 19:36:41 2019 +0000
tree 1c3e2553788f54e6a168af855f83a605874e64c4
parent e704325746709dec25529cee9436c9165f3b7e69

Implement alpha blend support for VK_FORMAT_A2B10G10R10_UNORM_PACK32

dEQP doesn't try to render this format with blending enabled, so we
missed the attachment read path.

Change-Id: Ib1decc0dbdf1e9895b5ac00b478a65fd717e534c
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/36488
Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>

src/Pipeline/PixelRoutine.cpp

diff --git a/src/Pipeline/PixelRoutine.cpp b/src/Pipeline/PixelRoutine.cpp
index 186a44a..495c785 100644
--- a/src/Pipeline/PixelRoutine.cpp
+++ b/src/Pipeline/PixelRoutine.cpp
@@ -1063,6 +1063,21 @@
 			pixel.z = Short4(0xFFFFu);
 			pixel.w = Short4(0xFFFFu);
 			break;
+		case VK_FORMAT_A2B10G10R10_UNORM_PACK32:
+		{
+			buffer = cBuffer;
+			Int4 v = Int4(0);
+			v = Insert(v, *Pointer<Int>(buffer + 4 * x), 0);
+			v = Insert(v, *Pointer<Int>(buffer + 4 * x + 4), 1);
+			buffer += *Pointer<Int>(data + OFFSET(DrawData, colorPitchB[index]));
+			v = Insert(v, *Pointer<Int>(buffer + 4 * x), 2);
+			v = Insert(v, *Pointer<Int>(buffer + 4 * x + 4), 3);
+
+			pixel.x = Short4(v << 6) & Short4(0xFFC0u);
+			pixel.y = Short4(v >> 4) & Short4(0xFFC0u);
+			pixel.z = Short4(v >> 14) & Short4(0xFFC0u);
+			pixel.w = Short4(v >> 16) & Short4(0xC000u);
+		} break;
 		default:
 			UNIMPLEMENTED("VkFormat %d", state.targetFormat[index]);
 		}