Added --deepColor option to SampleApp, triggers creation of a ten-bit/channel buffer on Windows.

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index c223a602132743d9a7baffcdb98c94e6cd39cee2..b316f924a93c6e059269e1c4fee7ec39f1eb41b2 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -19,6 +19,7 @@
 #include "SkGrPriv.h"
 
 #include "batches/GrCopySurfaceBatch.h"
+#include "effects/GrColorSpaceEffect.h"
 #include "effects/GrConfigConversionEffect.h"
 #include "text/GrTextBlobCache.h"
 
@@ -528,6 +529,63 @@ bool GrContext::readSurfacePixels(GrSurface* src,
     return true;
 }
 
+bool GrContext::writeSurfacePixelsWithColorSpace(GrSurface* surface,
+                                                 int left, int top, int width, int height,
+                                                 GrPixelConfig srcConfig,
+                                                 const SkColorSpace* srcColorSpace,
+                                                 const SkColorSpace* dstColorSpace,
+                                                 const void* buffer, size_t rowBytes,
+                                                 uint32_t colorSpaceOpsFlags) {
+    ASSERT_SINGLE_OWNER
+    RETURN_FALSE_IF_ABANDONED
+    ASSERT_OWNED_RESOURCE(surface);
+    SkASSERT(surface);
+    GR_AUDIT_TRAIL_AUTO_FRAME(&fAuditTrail, "GrContext::writeSurfacePixelsWithColorSpace");
+
+    if (surface->surfacePriv().hasPendingIO()) {
+        this->flush();
+    }
+
+    GrSurfaceDesc srcDesc;
+    srcDesc.fWidth = width;
+    srcDesc.fHeight = height;
+    srcDesc.fConfig = srcConfig;
+
+    SkAutoTUnref<GrTexture> tempTexture(
+        this->textureProvider()->createTexture(srcDesc, SkBudgeted::kYes, buffer, rowBytes));
+    if (!tempTexture) {
+        return false;
+    }
+
+    SkAutoTUnref<const GrFragmentProcessor> fp;
+    fp.reset(GrColorSpaceEffect::Create(tempTexture,
+                                        srcColorSpace, dstColorSpace, colorSpaceOpsFlags));
+
+    GrRenderTarget* renderTarget = surface->asRenderTarget();
+    SkASSERT(renderTarget);
+
+    SkMatrix matrix;
+    matrix.setTranslate(SkIntToScalar(left), SkIntToScalar(top));
+    SkSurfaceProps props(SkSurfaceProps::kGammaCorrect_Flag,
+                         SkSurfaceProps::kLegacyFontHost_InitType);
+    SkAutoTUnref<GrDrawContext> drawContext(this->drawContext(renderTarget, &props));
+    if (!drawContext) {
+        return false;
+    }
+
+    GrPaint paint;
+    paint.addColorFragmentProcessor(fp);
+    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
+    paint.setGammaCorrect(true);
+
+    SkRect rect = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
+    drawContext->drawRect(GrClip::WideOpen(), paint, matrix, rect, nullptr);
+
+    this->flushSurfaceWrites(surface);
+
+    return true;
+}
+
 void GrContext::prepareSurfaceForExternalIO(GrSurface* surface) {
     ASSERT_SINGLE_OWNER
     RETURN_IF_ABANDONED