Improve quality of distance field rendering

src/gpu/GrDistanceFieldTextContext.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDistanceFieldTextContext.h"
 #include "GrAtlas.h"
 #include "GrBitmapTextContext.h"
@@ skipping 16 matching lines @@
 #include "SkPath.h"
 #include "SkRTConf.h"
 #include "SkStrokeRec.h"
 #include "effects/GrDistanceFieldTextureEffect.h"
 
 SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false,
                 "Dump the contents of the font cache before every purge.");
 
 static const int kSmallDFFontSize = 32;
 static const int kSmallDFFontLimit = 32;
-static const int kMediumDFFontSize = 64;
-static const int kMediumDFFontLimit = 64;
-static const int kLargeDFFontSize = 128;
+static const int kMediumDFFontSize = 78;
+static const int kMediumDFFontLimit = 78;
+static const int kLargeDFFontSize = 192;
 
 namespace {
 // position + texture coord
 extern const GrVertexAttrib gTextVertexAttribs[] = {
     {kVec2f_GrVertexAttribType, 0,                kPosition_GrVertexAttribBinding},
     {kVec2f_GrVertexAttribType, sizeof(SkPoint) , kGeometryProcessor_GrVertexAttribBinding}
 };
 
 static const size_t kTextVASize = 2 * sizeof(SkPoint); 
 
@@ skipping 96 matching lines @@
     }
 
     fVertices = NULL;
     fCurrVertex = 0;
     fAllocVertexCount = 0;
     fTotalVertexCount = 0;
 
     if (scaledTextSize <= kSmallDFFontLimit) {
         fTextRatio = textSize / kSmallDFFontSize;
         fSkPaint.setTextSize(SkIntToScalar(kSmallDFFontSize));
+#if DEBUG_TEXT_SIZE

[bsalomon, 2014/11/03 21:45:23]

cool!

+        fSkPaint.setColor(SkColorSetARGB(0xFF, 0x00, 0x00, 0xFF));
+        fPaint.setColor(GrColorPackRGBA(0x00, 0x00, 0xFF, 0xFF));
+#endif
     } else if (scaledTextSize <= kMediumDFFontLimit) {
         fTextRatio = textSize / kMediumDFFontSize;
         fSkPaint.setTextSize(SkIntToScalar(kMediumDFFontSize));
+#if DEBUG_TEXT_SIZE
+        fSkPaint.setColor(SkColorSetARGB(0xFF, 0x00, 0xFF, 0x00));
+        fPaint.setColor(GrColorPackRGBA(0x00, 0xFF, 0x00, 0xFF));
+#endif
     } else {
         fTextRatio = textSize / kLargeDFFontSize;
         fSkPaint.setTextSize(SkIntToScalar(kLargeDFFontSize));
+#if DEBUG_TEXT_SIZE
+        fSkPaint.setColor(SkColorSetARGB(0xFF, 0xFF, 0x00, 0x00));
+        fPaint.setColor(GrColorPackRGBA(0xFF, 0x00, 0x00, 0xFF));
+#endif
     }
 
     fUseLCDText = fSkPaint.isLCDRenderText();
 
     fSkPaint.setLCDRenderText(false);
     fSkPaint.setAutohinted(false);
     fSkPaint.setHinting(SkPaint::kNormal_Hinting);
     fSkPaint.setSubpixelText(true);
 }
 
@@ skipping 505 matching lines @@
     }
 }
 
 inline void GrDistanceFieldTextContext::finish() {
     this->flush();
     fTotalVertexCount = 0;
 
     GrTextContext::finish();
 }