Gamma-correctness pushed into Skia, top-down.

src/views/SkWindow.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkWindow.h"
 #include "SkCanvas.h"
 #include "SkOSMenu.h"
@@ skipping 52 matching lines @@
     this->setSize(SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()));
 }
 
 void SkWindow::resize(int width, int height) {
     this->resize(fBitmap.info().makeWH(width, height));
 }
 
 void SkWindow::setColorType(SkColorType ct, SkColorProfileType pt) {
     const SkImageInfo& info = fBitmap.info();
     this->resize(SkImageInfo::Make(info.width(), info.height(), ct, kPremul_SkAlphaType, pt));
+
+    // Set the global flag that enables or disables "legacy" mode, depending on our format.
+    // With sRGB 32-bit or linear FP 16, we turn on gamma-correct handling of inputs:
+    SkSurfaceProps props = this->getSurfaceProps();
+    uint32_t flags = (props.flags() & ~SkSurfaceProps::kAllowSRGBInputs_Flag) |
+        (SkColorAndProfileAreGammaCorrect(ct, pt) ? SkSurfaceProps::kAllowSRGBInputs_Flag : 0);
+    this->setSurfaceProps(SkSurfaceProps(flags, props.pixelGeometry()));
 }
 
 bool SkWindow::handleInval(const SkRect* localR) {
     SkIRect ir;
 
     if (localR) {
         SkRect devR;
         SkMatrix inverse;
         if (!fMatrix.invert(&inverse)) {
             return false;
@@ skipping 243 matching lines @@
         const GrGLInterface* interface, GrContext* grContext) {
     GrBackendRenderTargetDesc desc;
     desc.fWidth = SkScalarRoundToInt(this->width());
     desc.fHeight = SkScalarRoundToInt(this->height());
     // TODO: Query the actual framebuffer for sRGB capable. However, to
     // preserve old (fake-linear) behavior, we don't do this. Instead, rely
     // on the flag (currently driven via 'C' mode in SampleApp).
     //
     // Also, we may not have real sRGB support (ANGLE, in particular), so check for
     // that, and fall back to L32:
-    desc.fConfig = grContext->caps()->srgbSupport() &&
-                   (info().profileType() == kSRGB_SkColorProfileType ||
-                    info().colorType() == kRGBA_F16_SkColorType)
+    desc.fConfig = grContext->caps()->srgbSupport() && SkImageInfoIsGammaCorrect(info())
         ? kSkiaGamma8888_GrPixelConfig
         : kSkia8888_GrPixelConfig;
     desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
     desc.fSampleCnt = attachmentInfo.fSampleCount;
     desc.fStencilBits = attachmentInfo.fStencilBits;
     GrGLint buffer;
     GR_GL_GetIntegerv(interface, GR_GL_FRAMEBUFFER_BINDING, &buffer);
     desc.fRenderTargetHandle = buffer;
     return grContext->textureProvider()->wrapBackendRenderTarget(desc);
 }
 
 #endif