Adjust distance field glyph and font atlas sizes to maximize storage.

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"
 #include "GrDrawTarget.h"
 #include "GrDrawTargetCaps.h"
+#include "GrFontAtlasSizes.h"
 #include "GrFontCache.h"
 #include "GrFontScaler.h"
 #include "GrGpu.h"
 #include "GrIndexBuffer.h"
 #include "GrStrokeInfo.h"
 #include "GrTexturePriv.h"
 
 #include "SkAutoKern.h"
 #include "SkColorFilter.h"
 #include "SkDistanceFieldGen.h"
 #include "SkDraw.h"
 #include "SkGlyphCache.h"
 #include "SkGpuDevice.h"
 #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 = 78;
-static const int kMediumDFFontLimit = 78;
-static const int kLargeDFFontSize = 192;
+static const int kMediumDFFontSize = 70;
+static const int kMediumDFFontLimit = 70;
+static const int kLargeDFFontSize = 156;
+SK_COMPILE_ASSERT(GR_SDF_MAX_SIZE >= kLargeDFFontSize, sdf_too_big);
 
 static const int kVerticesPerGlyph = 4;
 static const int kIndicesPerGlyph = 6;
 
 GrDistanceFieldTextContext::GrDistanceFieldTextContext(GrContext* context,
                                                        const SkDeviceProperties& properties,
                                                        bool enable)
                                                     : GrTextContext(context, properties) {
 #if SK_FORCE_DISTANCE_FIELD_TEXT
     fEnableDFRendering = true;
@@ skipping 344 matching lines @@
     bool success = drawTarget->reserveVertexAndIndexSpace(numVertices,
                                                           get_vertex_stride(useColorVerts),
                                                           0,
                                                           &vertices,
                                                           NULL);
     GrAlwaysAssert(success);
     return vertices;
 }
 
 void GrDistanceFieldTextContext::setupCoverageEffect(const SkColor& filteredColor) {
-    GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
+    GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
     GrTextureParams gammaParams(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
     
     uint32_t textureUniqueID = fCurrTexture->getUniqueID();
     const SkMatrix& ctm = fViewMatrix;
     
     // set up any flags
     uint32_t flags = 0;
     flags |= ctm.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
     flags |= fUseLCDText ? kUseLCD_DistanceFieldEffectFlag : 0;
     flags |= fUseLCDText && ctm.rectStaysRect() ?
@@ skipping 303 matching lines @@
     }
 }
 
 inline void GrDistanceFieldTextContext::finish() {
     this->flush();
     fTotalVertexCount = 0;
 
     GrTextContext::finish();
 }