Use shader based blending to clamp kPlus mode w/F16

Bug: skia:6173
Change-Id: I21042d484d9a7b3eee04aa3301d9793d00ad6908
Reviewed-on: https://skia-review.googlesource.com/48183
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/src/gpu/GrXferProcessor.cpp b/src/gpu/GrXferProcessor.cpp
index 8c0568bcae..c7383f2947 100644
--- a/src/gpu/GrXferProcessor.cpp
+++ b/src/gpu/GrXferProcessor.cpp
@@ -157,12 +157,14 @@ GrXPFactory::AnalysisProperties GrXPFactory::GetAnalysisProperties(
         const GrXPFactory* factory,
         const GrProcessorAnalysisColor& color,
         const GrProcessorAnalysisCoverage& coverage,
-        const GrCaps& caps) {
+        const GrCaps& caps,
+        GrPixelConfigIsClamped dstIsClamped) {
     AnalysisProperties result;
     if (factory) {
-        result = factory->analysisProperties(color, coverage, caps);
+        result = factory->analysisProperties(color, coverage, caps, dstIsClamped);
     } else {
-        result = GrPorterDuffXPFactory::SrcOverAnalysisProperties(color, coverage, caps);
+        result = GrPorterDuffXPFactory::SrcOverAnalysisProperties(color, coverage, caps,
+                                                                  dstIsClamped);
     }
     SkASSERT(!(result & AnalysisProperties::kRequiresDstTexture));
     if ((result & AnalysisProperties::kReadsDstInShader) &&
@@ -179,10 +181,11 @@ sk_sp<const GrXferProcessor> GrXPFactory::MakeXferProcessor(const GrXPFactory* f
                                                             const GrProcessorAnalysisColor& color,
                                                             GrProcessorAnalysisCoverage coverage,
                                                             bool hasMixedSamples,
-                                                            const GrCaps& caps) {
+                                                            const GrCaps& caps,
+                                                            GrPixelConfigIsClamped dstIsClamped) {
     SkASSERT(!hasMixedSamples || caps.shaderCaps()->dualSourceBlendingSupport());
     if (factory) {
-        return factory->makeXferProcessor(color, coverage, hasMixedSamples, caps);
+        return factory->makeXferProcessor(color, coverage, hasMixedSamples, caps, dstIsClamped);
     } else {
         return GrPorterDuffXPFactory::MakeSrcOverXferProcessor(color, coverage, hasMixedSamples,
                                                                caps);