commit 2091fbb07c71d3518e96bd8fc20cedfe757cb985
author Brian Osman <brianosman@google.com> Thu Oct 11 11:05:37 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Thu Oct 11 15:33:54 2018 +0000
tree c3005255a90db165e3c11fabf4c8a0e0cf52136c
parent 3ea317cb6f7aa4f9fdd94f0e59b384f39e882f33

Fix some bugs around opaque color types and computeIsOpaque

Spun out from: https://skia-review.googlesource.com/c/skia/+/161423

Bug: skia:
Change-Id: I7f3a7e10faa844271235f3b064576d43bab8e554
Reviewed-on: https://skia-review.googlesource.com/c/161480
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

src/gpu/GrContext.cpp

diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index b29454c..596fa66 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -565,7 +565,9 @@
         if (kUnknown_SkColorType == srcSkColorType || kUnknown_SkColorType == dstSkColorType) {
             return false;
         }
-        auto srcAlphaType = premul ? kUnpremul_SkAlphaType : kPremul_SkAlphaType;
+        auto srcAlphaType = SkColorTypeIsAlwaysOpaque(srcSkColorType)
+                ? kOpaque_SkAlphaType
+                : (premul ? kUnpremul_SkAlphaType : kPremul_SkAlphaType);
         SkPixmap src(SkImageInfo::Make(width, height, srcSkColorType, srcAlphaType,
                                        sk_ref_sp(srcColorSpace)),
                      buffer, rowBytes);
@@ -738,15 +740,16 @@
     if (convert) {
         SkColorType srcSkColorType = GrColorTypeToSkColorType(allowedColorType);
         SkColorType dstSkColorType = GrColorTypeToSkColorType(dstColorType);
+        bool srcAlwaysOpaque = SkColorTypeIsAlwaysOpaque(srcSkColorType);
+        bool dstAlwaysOpaque = SkColorTypeIsAlwaysOpaque(dstSkColorType);
         if (kUnknown_SkColorType == srcSkColorType || kUnknown_SkColorType == dstSkColorType) {
             return false;
         }
-        auto tempAT = SkColorTypeIsAlwaysOpaque(srcSkColorType) ? kOpaque_SkAlphaType
-                                                                : kPremul_SkAlphaType;
+        auto tempAT = srcAlwaysOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
         auto tempII = SkImageInfo::Make(width, height, srcSkColorType, tempAT,
                                         src->colorSpaceInfo().refColorSpace());
-        SkASSERT(!unpremul || !SkColorTypeIsAlwaysOpaque(dstSkColorType));
-        auto finalAT = SkColorTypeIsAlwaysOpaque(srcSkColorType)
+        SkASSERT(!unpremul || !dstAlwaysOpaque);
+        auto finalAT = (srcAlwaysOpaque || dstAlwaysOpaque)
                                ? kOpaque_SkAlphaType
                                : unpremul ? kUnpremul_SkAlphaType : kPremul_SkAlphaType;
         auto finalII =