Hook in rough distance field support for fonts

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index db440c149af74b8d4d137d908eaeb4988177f22c..960b9acb79258536f6acf1e426032e96b149c955 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -12,6 +12,7 @@
 
 #include "GrContext.h"
 #include "GrBitmapTextContext.h"
+#include "GrDistanceFieldTextContext.h"
 
 #include "SkGrTexturePixelRef.h"
 
@@ -28,6 +29,8 @@
 
 #define CACHE_COMPATIBLE_DEVICE_TEXTURES 1
 
+#define USE_DISTANCE_FIELDS              1
+
 #if 0
     extern bool (*gShouldDrawProc)();
     #define CHECK_SHOULD_DRAW(draw, forceI)                     \
@@ -1732,6 +1735,11 @@ SkDrawProcs* SkGpuDevice::initDrawForText(GrTextContext* context) {
         fDrawProcs = SkNEW(GrSkDrawProcs);
         fDrawProcs->fD1GProc = SkGPU_Draw1Glyph;
         fDrawProcs->fContext = fContext;
+        fDrawProcs->fFlags = 0;
+#if USE_DISTANCE_FIELDS
+        fDrawProcs->fFlags |= SkDrawProcs::kSkipBakedGlyphTransform_Flag;
+        fDrawProcs->fFlags |= SkDrawProcs::kUseScaledGlyphs_Flag;
+#endif
     }
 
     // init our (and GL's) state
@@ -1755,7 +1763,11 @@ void SkGpuDevice::drawText(const SkDraw& draw, const void* text,
         if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
             return;
         }
+#if USE_DISTANCE_FIELDS
+        GrDistanceFieldTextContext context(fContext, grPaint, paint.getTextSize());
+#else
         GrBitmapTextContext context(fContext, grPaint);
+#endif
         myDraw.fProcs = this->initDrawForText(&context);
         this->INHERITED::drawText(myDraw, text, byteLength, x, y, paint);
     }
@@ -1778,7 +1790,11 @@ void SkGpuDevice::drawPosText(const SkDraw& draw, const void* text,
         if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
             return;
         }
+#if USE_DISTANCE_FIELDS
+        GrDistanceFieldTextContext context(fContext, grPaint, paint.getTextSize());
+#else
         GrBitmapTextContext context(fContext, grPaint);
+#endif
         myDraw.fProcs = this->initDrawForText(&context);
         this->INHERITED::drawPosText(myDraw, text, byteLength, pos, constY,
                                      scalarsPerPos, paint);