Distance field fixes for Android

src/gpu/GrTextStrike.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAtlas.h"
 #include "GrGpu.h"
 #include "GrRectanizer.h"
@@ skipping 163 matching lines @@
 #endif
 
 #ifdef SK_DEVELOPER
 void GrFontCache::dump() const {
     static int gDumpCount = 0;
     for (int i = 0; i < kAtlasCount; ++i) {
         if (NULL != fAtlasMgr[i]) {
             GrTexture* texture = fAtlasMgr[i]->getTexture();
             if (NULL != texture) {
                 SkString filename;
+#ifdef SK_BUILD_FOR_ANDROID
+                filename.printf("/sdcard/fontcache_%d%d.png", gDumpCount, i);
+#else
                 filename.printf("fontcache_%d%d.png", gDumpCount, i);
+#endif
                 texture->savePixels(filename.c_str());
             }
         }
     }
     ++gDumpCount;
 }
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ skipping 46 matching lines @@
 
 GrGlyph* GrTextStrike::generateGlyph(GrGlyph::PackedID packed,
                                      GrFontScaler* scaler) {
     SkIRect bounds;
     if (!scaler->getPackedGlyphBounds(packed, &bounds)) {
         return NULL;
     }
 
     GrGlyph* glyph = fPool.alloc();
     // expand bounds to hold full distance field data
+    // + room for bilerp
+    int pad = DISTANCE_FIELD_RANGE+1;
     if (fUseDistanceField) {
-        bounds.fLeft   -= DISTANCE_FIELD_RANGE;
-        bounds.fRight  += DISTANCE_FIELD_RANGE;
-        bounds.fTop    -= DISTANCE_FIELD_RANGE;
-        bounds.fBottom += DISTANCE_FIELD_RANGE;
+        bounds.fLeft   -= pad;
+        bounds.fRight  += pad;
+        bounds.fTop    -= pad;
+        bounds.fBottom += pad;
     }
     glyph->init(packed, bounds);
     fCache.insert(packed, glyph);
     return glyph;
 }
 
 void GrTextStrike::removePlot(const GrPlot* plot) {
     SkTDArray<GrGlyph*>& glyphArray = fCache.getArray();
     for (int i = 0; i < glyphArray.count(); ++i) {
         if (plot == glyphArray[i]->fPlot) {
@@ skipping 19 matching lines @@
     SkAutoRef ar(scaler);
 
     int bytesPerPixel = GrMaskFormatBytesPerPixel(fMaskFormat);
 
     GrPlot* plot;
     if (fUseDistanceField) {
         // we've already expanded the glyph dimensions to match the final size
         // but must shrink back down to get the packed glyph data
         int dfWidth = glyph->width();
         int dfHeight = glyph->height();
-        int width = dfWidth - 2*DISTANCE_FIELD_RANGE;
-        int height = dfHeight - 2*DISTANCE_FIELD_RANGE;
+        int pad = DISTANCE_FIELD_RANGE+1;
+        int width = dfWidth - 2*pad;
+        int height = dfHeight - 2*pad;
         int stride = width*bytesPerPixel;
 
         size_t size = width * height * bytesPerPixel;
         SkAutoSMalloc<1024> storage(size);
         if (!scaler->getPackedGlyphImage(glyph->fPackedID, width, height, stride, storage.get())) {
             return false;
         }
 
         // alloc storage for distance field glyph
         size_t dfSize = dfWidth * dfHeight * bytesPerPixel;
@@ skipping 41 matching lines @@
                                      &glyph->fAtlasLocation);
     }
 
     if (NULL == plot) {
         return false;
     }
 
     glyph->fPlot = plot;
     return true;
 }