Index: src/gpu/GrContext.cpp |
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp |
index 31845f9d6df80b7c9c2ea819e4278f0d46ac37b1..3ea67c9f018d27094b8791c646a57fda5722502d 100644 |
--- a/src/gpu/GrContext.cpp |
+++ b/src/gpu/GrContext.cpp |
@@ -20,6 +20,7 @@ |
#include "batches/GrCopySurfaceBatch.h" |
#include "effects/GrConfigConversionEffect.h" |
+#include "effects/GrGammaEffect.h" |
#include "text/GrTextBlobCache.h" |
#define ASSERT_OWNED_RESOURCE(R) SkASSERT(!(R) || (R)->getContext() == this) |
@@ -529,6 +530,44 @@ bool GrContext::readSurfacePixels(GrSurface* src, |
return true; |
} |
+bool GrContext::applyGamma(GrRenderTarget* dst, GrTexture* src, SkScalar gamma){ |
+ ASSERT_SINGLE_OWNER |
+ RETURN_FALSE_IF_ABANDONED |
+ ASSERT_OWNED_RESOURCE(dst); |
+ ASSERT_OWNED_RESOURCE(src); |
+ GR_AUDIT_TRAIL_AUTO_FRAME(&fAuditTrail, "GrContext::applyGamma"); |
+ |
+ // Dimensions must match exactly. |
+ if (dst->width() != src->width() || dst->height() != src->height()) { |
+ return false; |
+ } |
+ |
+ SkSurfaceProps props(SkSurfaceProps::kGammaCorrect_Flag, |
+ SkSurfaceProps::kLegacyFontHost_InitType); |
+ sk_sp<GrDrawContext> drawContext(this->drawContext(sk_ref_sp(dst), &props)); |
+ if (!drawContext) { |
+ return false; |
+ } |
+ |
+ GrPaint paint; |
+ if (SkScalarNearlyEqual(gamma, 1.0f)) { |
+ paint.addColorTextureProcessor(src, GrCoordTransform::MakeDivByTextureWHMatrix(src)); |
+ } else { |
+ SkAutoTUnref<const GrFragmentProcessor> fp; |
+ fp.reset(GrGammaEffect::Create(src, gamma)); |
+ paint.addColorFragmentProcessor(fp); |
+ } |
+ paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); |
+ paint.setGammaCorrect(true); |
+ |
+ SkRect rect; |
+ src->getBoundsRect(&rect); |
+ drawContext->drawRect(GrClip::WideOpen(), paint, SkMatrix::I(), rect); |
+ |
+ this->flushSurfaceWrites(dst); |
+ return true; |
+} |
+ |
void GrContext::prepareSurfaceForExternalIO(GrSurface* surface) { |
ASSERT_SINGLE_OWNER |
RETURN_IF_ABANDONED |