Fix for issue 1728: raster vs. gpu text draws with the wrong color

src/gpu/SkGpuDevice.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 "SkGpuDevice.h"
 
 #include "effects/GrTextureDomainEffect.h"
@@ skipping 1737 matching lines @@
     if (fContext->getMatrix().hasPerspective()) {
         // this guy will just call our drawPath()
         draw.drawText((const char*)text, byteLength, x, y, paint);
     } else {
         SkDraw myDraw(draw);
 
         GrPaint grPaint;
         if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
             return;
         }
-        GrBitmapTextContext context(fContext, grPaint);
+
+        GrColor paintColorNoPreMultAlpha = SkColor2GrColorNoPremultiply(paint.getColor());
+        GrBitmapTextContext context(fContext, grPaint, paintColorNoPreMultAlpha);
         myDraw.fProcs = this->initDrawForText(&context);
         this->INHERITED::drawText(myDraw, text, byteLength, x, y, paint);
     }
 }
 
 void SkGpuDevice::drawPosText(const SkDraw& draw, const void* text,
                              size_t byteLength, const SkScalar pos[],
                              SkScalar constY, int scalarsPerPos,
                              const SkPaint& paint) {
     CHECK_SHOULD_DRAW(draw, false);
 
     if (fContext->getMatrix().hasPerspective()) {
         // this guy will just call our drawPath()
         draw.drawPosText((const char*)text, byteLength, pos, constY,
                          scalarsPerPos, paint);
     } else {
         SkDraw myDraw(draw);
 
         GrPaint grPaint;
         if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
             return;
         }
-        GrBitmapTextContext context(fContext, grPaint);
+        GrColor paintColorNoPreMultAlpha = SkColor2GrColorNoPremultiply(paint.getColor());
+        GrBitmapTextContext context(fContext, grPaint, paintColorNoPreMultAlpha);
         myDraw.fProcs = this->initDrawForText(&context);
         this->INHERITED::drawPosText(myDraw, text, byteLength, pos, constY,
                                      scalarsPerPos, paint);
     }
 }
 
 void SkGpuDevice::drawTextOnPath(const SkDraw& draw, const void* text,
                                 size_t len, const SkPath& path,
                                 const SkMatrix* m, const SkPaint& paint) {
     CHECK_SHOULD_DRAW(draw, false);
@@ skipping 71 matching lines @@
                          GrTexture* texture,
                          bool needClear)
     : SkBitmapDevice(make_bitmap(context, texture->asRenderTarget())) {
 
     SkASSERT(texture && texture->asRenderTarget());
     // This constructor is called from onCreateCompatibleDevice. It has locked the RT in the texture
     // cache. We pass true for the third argument so that it will get unlocked.
     this->initFromRenderTarget(context, texture->asRenderTarget(), true);
     fNeedClear = needClear;
 }