Rollback text allocation changes.

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 "SkColorFilter.h"
@@ skipping 47 matching lines @@
                                                        bool enable)
                                                     : GrTextContext(context, properties) {
 #if SK_FORCE_DISTANCEFIELD_FONTS
     fEnableDFRendering = true;
 #else
     fEnableDFRendering = enable;
 #endif
     fStrike = NULL;
     fGammaTexture = NULL;
 
+    fCurrTexture = NULL;
     fCurrVertex = 0;
     fEffectTextureUniqueID = SK_InvalidUniqueID;
     fEffectColor = GrColor_ILLEGAL;
     fEffectFlags = 0;
 
     fVertices = NULL;
+    fMaxVertices = 0;
 
     fVertexBounds.setLargestInverted();
 }
 
 GrDistanceFieldTextContext::~GrDistanceFieldTextContext() {
     this->flushGlyphs();
     SkSafeSetNull(fGammaTexture);
 }
 
 bool GrDistanceFieldTextContext::canDraw(const SkPaint& paint) {
@@ skipping 29 matching lines @@
     unsigned r = SkColorGetR(c);
     unsigned g = SkColorGetG(c);
     unsigned b = SkColorGetB(c);
     return GrColorPackRGBA(r, g, b, 0xff);
 }
 
 void GrDistanceFieldTextContext::setupCoverageEffect(const SkColor& filteredColor) {
     GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kBilerp_FilterMode);
     GrTextureParams gammaParams(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
     
-    GrTexture* currTexture = fStrike->getTexture();
-    SkASSERT(currTexture);
-    uint32_t textureUniqueID = currTexture->getUniqueID();
+    uint32_t textureUniqueID = fCurrTexture->getUniqueID();
     
     // set up any flags
     uint32_t flags = 0;
     flags |= fContext->getMatrix().isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
     flags |= fUseLCDText ? kUseLCD_DistanceFieldEffectFlag : 0;
     flags |= fUseLCDText && fContext->getMatrix().rectStaysRect() ?
     kRectToRect_DistanceFieldEffectFlag : 0;
     bool useBGR = SkDeviceProperties::Geometry::kBGR_Layout ==
     fDeviceProperties.fGeometry.getLayout();
     flags |= fUseLCDText && useBGR ? kBGR_DistanceFieldEffectFlag : 0;
     
     // see if we need to create a new effect
     if (textureUniqueID != fEffectTextureUniqueID ||
         filteredColor != fEffectColor ||
         flags != fEffectFlags) {
         if (fUseLCDText) {
             GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
-            fCachedEffect.reset(GrDistanceFieldLCDTextureEffect::Create(currTexture,
+            fCachedEffect.reset(GrDistanceFieldLCDTextureEffect::Create(fCurrTexture,
                                                                         params,
                                                                         fGammaTexture,
                                                                         gammaParams,
                                                                         colorNoPreMul,
                                                                         flags));
         } else {
 #ifdef SK_GAMMA_APPLY_TO_A8
             U8CPU lum = SkColorSpaceLuminance::computeLuminance(fDeviceProperties.fGamma,
                                                                 filteredColor);
-            fCachedEffect.reset(GrDistanceFieldTextureEffect::Create(currTexture,
+            fCachedEffect.reset(GrDistanceFieldTextureEffect::Create(fCurrTexture,
                                                                      params,
                                                                      fGammaTexture,
                                                                      gammaParams,
                                                                      lum/255.f,
                                                                      flags));
 #else
             fCachedEffect.reset(GrDistanceFieldTextureEffect::Create(currTexture,
                                                                      params, flags));
 #endif
         }
@@ skipping 57 matching lines @@
             //drawState->setColor(fPaint.getColor());
             // We're using per-vertex color.
             SkASSERT(drawState->hasColorVertexAttribute());
             drawState->setColor(0xFFFFFFFF);
         }
         int nGlyphs = fCurrVertex / 4;
         fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer());
         fDrawTarget->drawIndexedInstances(kTriangles_GrPrimitiveType,
                                           nGlyphs,
                                           4, 6, &fVertexBounds);
+        fDrawTarget->resetVertexSource();
+        fVertices = NULL;
+        fMaxVertices = 0;
         fCurrVertex = 0;
+        SkSafeSetNull(fCurrTexture);
         fVertexBounds.setLargestInverted();
     }
-
-    fDrawTarget->resetVertexSource();
-    fVertices = NULL;
 }
 
 void GrDistanceFieldTextContext::drawPackedGlyph(GrGlyph::PackedID packed,
                                                  SkFixed vx, SkFixed vy,
                                                  GrFontScaler* scaler) {
+    if (NULL == fDrawTarget) {
+        return;
+    }
+    
+    if (NULL == fStrike) {
+        fStrike = fContext->getFontCache()->getStrike(scaler, true);
+    }
+    
     GrGlyph* glyph = fStrike->getGlyph(packed, scaler);
     if (NULL == glyph || glyph->fBounds.isEmpty()) {
         return;
     }
 
     SkScalar sx = SkFixedToScalar(vx);
     SkScalar sy = SkFixedToScalar(vy);
 /*
     // not valid, need to find a different solution for this
     vx += SkIntToFixed(glyph->fBounds.fLeft);
@@ skipping 62 matching lines @@
     }
 
 HAS_ATLAS:
     SkASSERT(glyph->fPlot);
     GrDrawTarget::DrawToken drawToken = fDrawTarget->getCurrentDrawToken();
     glyph->fPlot->setDrawToken(drawToken);
 
     GrTexture* texture = glyph->fPlot->texture();
     SkASSERT(texture);
 
+    if (fCurrTexture != texture || fCurrVertex + 4 > fMaxVertices) {
+        this->flushGlyphs();
+        fCurrTexture = texture;
+        fCurrTexture->ref();
+    }
+
+    bool useColorVerts = !fUseLCDText;
+    
+    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);
+    }
+    
     SkScalar dx = SkIntToScalar(glyph->fBounds.fLeft + SK_DistanceFieldInset);
     SkScalar dy = SkIntToScalar(glyph->fBounds.fTop + SK_DistanceFieldInset);
     SkScalar width = SkIntToScalar(glyph->fBounds.width() - 2*SK_DistanceFieldInset);
     SkScalar height = SkIntToScalar(glyph->fBounds.height() - 2*SK_DistanceFieldInset);
 
     SkScalar scale = fTextRatio;
     dx *= scale;
     dy *= scale;
     sx += dx;
     sy += dy;
     width *= scale;
     height *= scale;
     
     SkFixed tx = SkIntToFixed(glyph->fAtlasLocation.fX + SK_DistanceFieldInset);
     SkFixed ty = SkIntToFixed(glyph->fAtlasLocation.fY + SK_DistanceFieldInset);
     SkFixed tw = SkIntToFixed(glyph->fBounds.width() - 2*SK_DistanceFieldInset);
     SkFixed th = SkIntToFixed(glyph->fBounds.height() - 2*SK_DistanceFieldInset);
 
     SkRect r;
-    r.fLeft = SkFixedToFloat(sx);
-    r.fTop = SkFixedToFloat(sy);
-    r.fRight = SkFixedToFloat(sx + width);
-    r.fBottom = SkFixedToFloat(sy + height);
+    r.fLeft = sx;
+    r.fTop = sy;
+    r.fRight = sx + width;
+    r.fBottom = sy + height;
 
     fVertexBounds.growToInclude(r);
 
     size_t vertSize = fUseLCDText ? (2 * sizeof(SkPoint))
                                   : (2 * sizeof(SkPoint) + sizeof(GrColor));
 
     SkASSERT(vertSize == fDrawTarget->getDrawState().getVertexSize());
 
     SkPoint* positions = reinterpret_cast<SkPoint*>(
         reinterpret_cast<intptr_t>(fVertices) + vertSize * fCurrVertex);
     positions->setRectFan(r.fLeft, r.fTop, r.fRight, r.fBottom, vertSize);
 
     // The texture coords are last in both the with and without color vertex layouts.
     SkPoint* textureCoords = reinterpret_cast<SkPoint*>(
             reinterpret_cast<intptr_t>(positions) + vertSize  - sizeof(SkPoint));
     textureCoords->setRectFan(SkFixedToFloat(texture->normalizeFixedX(tx)),
                               SkFixedToFloat(texture->normalizeFixedY(ty)),
                               SkFixedToFloat(texture->normalizeFixedX(tx + tw)),
                               SkFixedToFloat(texture->normalizeFixedY(ty + th)),
                               vertSize);
-    if (!fUseLCDText) {
+    if (useColorVerts) {
         // color comes after position.
         GrColor* colors = reinterpret_cast<GrColor*>(positions + 1);
         for (int i = 0; i < 4; ++i) {
             *colors = fPaint.getColor();
             colors = reinterpret_cast<GrColor*>(reinterpret_cast<intptr_t>(colors) + vertSize);
         }
     }
 
     fCurrVertex += 4;
 }
@@ skipping 79 matching lines @@
     SkASSERT(byteLength == 0 || text != NULL);
 
     // nothing to draw or can't draw
     if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/
         || fSkPaint.getRasterizer()) {
         return;
     }
 
     this->init(paint, skPaint);
 
-    if (NULL == fDrawTarget) {
-        return;
-    }
-
     SkScalar sizeRatio = fTextRatio;
 
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
     SkAutoGlyphCacheNoGamma    autoCache(fSkPaint, &fDeviceProperties, NULL);
     SkGlyphCache*              cache = autoCache.getCache();
     GrFontScaler*              fontScaler = GetGrFontScaler(cache);
-    if (NULL == fStrike) {
-        fStrike = fContext->getFontCache()->getStrike(fontScaler, true);
-    }
 
     setup_gamma_texture(fContext, cache, fDeviceProperties, &fGammaTexture);
 
-    // allocate vertices
-    SkASSERT(NULL == fVertices);
-    if (!fUseLCDText) {
-        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);
-
     // 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 47 matching lines @@
     SkASSERT(byteLength == 0 || text != NULL);
     SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition);
 
     // nothing to draw
     if (text == NULL || byteLength == 0 /* no raster clip? || fRC->isEmpty()*/) {
         return;
     }
 
     this->init(paint, skPaint);
 
-    if (NULL == fDrawTarget) {
-        return;
-    }
-
     SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc();
 
     SkAutoGlyphCacheNoGamma    autoCache(fSkPaint, &fDeviceProperties, NULL);
     SkGlyphCache*              cache = autoCache.getCache();
     GrFontScaler*              fontScaler = GetGrFontScaler(cache);
-    if (NULL == fStrike) {
-        fStrike = fContext->getFontCache()->getStrike(fontScaler, true);
-    }
-
-    // allocate vertices
-    SkASSERT(NULL == fVertices);
-    if (!fUseLCDText) {
-        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);
 
     setup_gamma_texture(fContext, cache, fDeviceProperties, &fGammaTexture);
 
     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);
 
@@ skipping 26 matching lines @@
                                       SkScalarToFixed(x) - (glyph.fAdvanceX >> alignShift),
                                       SkScalarToFixed(y) - (glyph.fAdvanceY >> alignShift),
                                       fontScaler);
             }
             pos += scalarsPerPosition;
         }
     }
 
     this->finish();
 }