Revert of Move vertex buffer setup out of drawPackedGlyph().

src/gpu/GrBitmapTextContext.cpp

Index: src/gpu/GrBitmapTextContext.cpp
diff --git a/src/gpu/GrBitmapTextContext.cpp b/src/gpu/GrBitmapTextContext.cpp
index fe3fa31c196a8d8ba3e4f480e6a3d5009dbb5062..3ca98e46eb29723151c471b1591ddccf03b9fe44 100755
--- a/src/gpu/GrBitmapTextContext.cpp
+++ b/src/gpu/GrBitmapTextContext.cpp
@@ -59,6 +59,7 @@
     fEffectTextureUniqueID = SK_InvalidUniqueID;
 
     fVertices = NULL;
+    fMaxVertices = 0;
 
     fVertexBounds.setLargestInverted();
 }
@@ -153,6 +154,7 @@
 
         fDrawTarget->resetVertexSource();
         fVertices = NULL;
+        fMaxVertices = 0;
         fCurrVertex = 0;
         fVertexBounds.setLargestInverted();
         SkSafeSetNull(fCurrTexture);
@@ -168,6 +170,7 @@
     fCurrVertex = 0;
 
     fVertices = NULL;
+    fMaxVertices = 0;
 }
 
 inline void GrBitmapTextContext::finish() {
@@ -188,18 +191,11 @@
 
     this->init(paint, skPaint);
 
-    if (NULL == fDrawTarget) {
-        return;
-    }
-
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
     SkAutoGlyphCache    autoCache(fSkPaint, &fDeviceProperties, &fContext->getMatrix());
     SkGlyphCache*       cache = autoCache.getCache();
     GrFontScaler*       fontScaler = GetGrFontScaler(cache);
-    if (NULL == fStrike) {
-        fStrike = fContext->getFontCache()->getStrike(fontScaler, false);
-    }
 
     // transform our starting point
     {
@@ -227,23 +223,6 @@
     }
 
     const char* stop = text + byteLength;
-
-    // allocate vertices
-    SkASSERT(NULL == fVertices);
-    bool useColorVerts = kA8_GrMaskFormat == fStrike->getMaskFormat();
-    if (useColorVerts) {
-        fDrawTarget->drawState()->setVertexAttribs<gTextVertexWithColorAttribs>(
-                                                    SK_ARRAY_COUNT(gTextVertexWithColorAttribs));
-    } else {
-        fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>(
-                                                    SK_ARRAY_COUNT(gTextVertexAttribs));
-    }
-    int numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL);
-    bool success = fDrawTarget->reserveVertexAndIndexSpace(4*numGlyphs,
-                                                           0,
-                                                           &fVertices,
-                                                           NULL);
-    GrAlwaysAssert(success);
 
     SkAutoKern autokern;
 
@@ -305,41 +284,16 @@
 
     this->init(paint, skPaint);
 
-    if (NULL == fDrawTarget) {
-        return;
-    }
-
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
     SkAutoGlyphCache    autoCache(fSkPaint, &fDeviceProperties, &fContext->getMatrix());
     SkGlyphCache*       cache = autoCache.getCache();
     GrFontScaler*       fontScaler = GetGrFontScaler(cache);
-    
-    if (NULL == fStrike) {
-        fStrike = fContext->getFontCache()->getStrike(fontScaler, false);
-    }
 
     // store original matrix before we reset, so we can use it to transform positions
     SkMatrix ctm = fContext->getMatrix();
     GrContext::AutoMatrix  autoMatrix;
     autoMatrix.setIdentity(fContext, &fPaint);
-
-    // allocate vertices
-    SkASSERT(NULL == fVertices);
-    bool useColorVerts = kA8_GrMaskFormat == fStrike->getMaskFormat();
-    if (useColorVerts) {
-        fDrawTarget->drawState()->setVertexAttribs<gTextVertexWithColorAttribs>(
-                                                    SK_ARRAY_COUNT(gTextVertexWithColorAttribs));
-    } else {
-        fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>(
-                                                    SK_ARRAY_COUNT(gTextVertexAttribs));
-    }
-    int numGlyphs = fSkPaint.textToGlyphs(text, byteLength, NULL);
-    bool success = fDrawTarget->reserveVertexAndIndexSpace(4*numGlyphs,
-                                                           0,
-                                                           &fVertices,
-                                                           NULL);
-    GrAlwaysAssert(success);
 
     const char*        stop = text + byteLength;
     SkTextAlignProc    alignProc(fSkPaint.getTextAlign());
@@ -472,6 +426,14 @@
 void GrBitmapTextContext::drawPackedGlyph(GrGlyph::PackedID packed,
                                           SkFixed vx, SkFixed vy,
                                           GrFontScaler* scaler) {
+    if (NULL == fDrawTarget) {
+        return;
+    }
+
+    if (NULL == fStrike) {
+        fStrike = fContext->getFontCache()->getStrike(scaler, false);
+    }
+
     GrGlyph* glyph = fStrike->getGlyph(packed, scaler);
     if (NULL == glyph || glyph->fBounds.isEmpty()) {
         return;
@@ -554,10 +516,53 @@
     GrTexture* texture = glyph->fPlot->texture();
     SkASSERT(texture);
 
-    if (fCurrTexture != texture) {
+    if (fCurrTexture != texture || fCurrVertex + 4 > fMaxVertices) {
         this->flushGlyphs();
         fCurrTexture = texture;
         fCurrTexture->ref();
+    }
+
+    bool useColorVerts = kA8_GrMaskFormat == fStrike->getMaskFormat();
+
+    if (NULL == fVertices) {
+       // If we need to reserve vertices allow the draw target to suggest
+        // a number of verts to reserve and whether to perform a flush.
+        fMaxVertices = kMinRequestedVerts;
+        if (useColorVerts) {
+            fDrawTarget->drawState()->setVertexAttribs<gTextVertexWithColorAttribs>(
+                SK_ARRAY_COUNT(gTextVertexWithColorAttribs));
+        } else {
+            fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>(
+                SK_ARRAY_COUNT(gTextVertexAttribs));
+        }
+        bool flush = fDrawTarget->geometryHints(&fMaxVertices, NULL);
+        if (flush) {
+            this->flushGlyphs();
+            fContext->flush();
+            if (useColorVerts) {
+                fDrawTarget->drawState()->setVertexAttribs<gTextVertexWithColorAttribs>(
+                  SK_ARRAY_COUNT(gTextVertexWithColorAttribs));
+            } else {
+                fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>(
+                  SK_ARRAY_COUNT(gTextVertexAttribs));
+            }
+        }
+        fMaxVertices = kDefaultRequestedVerts;
+        // ignore return, no point in flushing again.
+        fDrawTarget->geometryHints(&fMaxVertices, NULL);
+
+        int maxQuadVertices = 4 * fContext->getQuadIndexBuffer()->maxQuads();
+        if (fMaxVertices < kMinRequestedVerts) {
+            fMaxVertices = kDefaultRequestedVerts;
+        } else if (fMaxVertices > maxQuadVertices) {
+            // don't exceed the limit of the index buffer
+            fMaxVertices = maxQuadVertices;
+        }
+        bool success = fDrawTarget->reserveVertexAndIndexSpace(fMaxVertices,
+                                                               0,
+                                                               &fVertices,
+                                                               NULL);
+        GrAlwaysAssert(success);
     }
 
     SkFixed tx = SkIntToFixed(glyph->fAtlasLocation.fX);
@@ -571,7 +576,6 @@
 
     fVertexBounds.growToInclude(r);
 
-    bool useColorVerts = kA8_GrMaskFormat == fStrike->getMaskFormat();
     size_t vertSize = useColorVerts ? (2 * sizeof(SkPoint) + sizeof(GrColor)) :
                                       (2 * sizeof(SkPoint));