Add standalone drawText for GrTextContext.

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 "GrDrawTarget.h"
 #include "GrFontScaler.h"
 #include "SkGlyphCache.h"
 #include "GrIndexBuffer.h"
 #include "GrTextStrike.h"
 #include "GrTextStrike_impl.h"
+#include "SkGpuDevice.h"
 #include "SkPath.h"
 #include "SkRTConf.h"
 #include "SkStrokeRec.h"
 #include "effects/GrDistanceFieldTextureEffect.h"
 
 static const int kGlyphCoordsAttributeIndex = 1;
 
 static const int kBaseDFFontSize = 32;
 
 SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false,
                 "Dump the contents of the font cache before every purge.");
 
-GrDistanceFieldTextContext::GrDistanceFieldTextContext(GrContext* context,
+GrDistanceFieldTextContext::GrDistanceFieldTextContext(GrContext* context, 
                                                        const GrPaint& grPaint,
-                                                       const SkPaint& skPaint)
-                                                     : GrTextContext(context, grPaint, skPaint) {
+                                                       const SkPaint& skPaint, 
+                                                       const SkDeviceProperties& properties)
+                                            : GrTextContext(context, grPaint, skPaint, properties) {
     fStrike = NULL;
 
     fCurrTexture = NULL;
     fCurrVertex = 0;
 
     fVertices = NULL;
     fMaxVertices = 0;
 
     fTextRatio = fSkPaint.getTextSize()/kBaseDFFontSize;
 
@@ skipping 234 matching lines @@
                                         2 * sizeof(SkPoint));
     fVertices[2*fCurrVertex+1].setRectFan(SkFixedToFloat(texture->normalizeFixedX(tx)),
                                           SkFixedToFloat(texture->normalizeFixedY(ty)),
                                           SkFixedToFloat(texture->normalizeFixedX(tx + tw)),
                                           SkFixedToFloat(texture->normalizeFixedY(ty + th)),
                                           2 * sizeof(SkPoint));
     fCurrVertex += 4;
 }
 
 void GrDistanceFieldTextContext::drawText(const char text[], size_t byteLength,
-                                          SkScalar x, SkScalar y, SkGlyphCache* cache,
-                                          GrFontScaler* fontScaler) {
+                                          SkScalar x, SkScalar y) {
     SkASSERT(byteLength == 0 || text != NULL);
 
-    // nothing to draw
-    if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/) {
+    // nothing to draw or can't draw
+    if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/
+        || fSkPaint.getRasterizer()) {
         return;
     }
-
+    
     SkScalar sizeRatio = fTextRatio;
 
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
+    SkAutoGlyphCache    autoCache(fSkPaint, &fDeviceProperties, NULL);
+    SkGlyphCache*       cache = autoCache.getCache();
+    GrFontScaler*       fontScaler = GetGrFontScaler(cache);
+    
     // need to measure first
     // TODO - generate positions and pre-load cache as well?
     const char* stop = text + byteLength;
     if (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) {
         SkFixed    stopX = 0;
         SkFixed    stopY = 0;
 
         const char* textPtr = text;
         while (textPtr < stop) {
             // don't need x, y here, since all subpixel variants will have the
@@ skipping 32 matching lines @@
                                   fontScaler);
         }
 
         fx += SkFixedMul_portable(glyph.fAdvanceX, fixedScale);
         fy += SkFixedMul_portable(glyph.fAdvanceY, fixedScale);
     }
 }
 
 void GrDistanceFieldTextContext::drawPosText(const char text[], size_t byteLength,
                                              const SkScalar pos[], SkScalar constY,
-                                             int scalarsPerPosition,
-                                             SkGlyphCache* cache, GrFontScaler* fontScaler) {
+                                             int scalarsPerPosition) {
 
     SkASSERT(byteLength == 0 || text != NULL);
     SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
 
     // nothing to draw
-    if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/) {
+    if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/
+        || fSkPaint.getRasterizer()) {
         return;
     }
 
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
+    SkAutoGlyphCache    autoCache(fSkPaint, &fDeviceProperties, NULL);
+    SkGlyphCache*       cache = autoCache.getCache();
+    GrFontScaler*       fontScaler = GetGrFontScaler(cache);
+    
     const char*        stop = text + byteLength;
 
     if (SkPaint::kLeft_Align == fSkPaint.getTextAlign()) {
         while (text < stop) {
             // the last 2 parameters are ignored
             const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0);
 
             if (glyph.fWidth) {
                 SkScalar x = pos[0];
                 SkScalar y = scalarsPerPosition == 1 ? constY : pos[1];
@@ skipping 23 matching lines @@
                                       SkScalarToFixed(x) - (glyph.fAdvanceX >> alignShift)
                                         + SK_FixedHalf, //d1g.fHalfSampleX,
                                       SkScalarToFixed(y) - (glyph.fAdvanceY >> alignShift)
                                         + SK_FixedHalf, //d1g.fHalfSampleY,
                                       fontScaler);
             }
             pos += scalarsPerPosition;
         }
     }
 }