Make GrTextContext be owned by the GrDrawContext

src/gpu/GrAtlasTextContext.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrAtlasTextContext.h"
 
 #include "GrBatch.h"
 #include "GrBatchFontCache.h"
 #include "GrBatchTarget.h"
 #include "GrBatchTest.h"
 #include "GrBlurUtils.h"
 #include "GrDefaultGeoProcFactory.h"
 #include "GrDrawContext.h"
+#include "GrDrawTarget.h"
 #include "GrFontScaler.h"
 #include "GrIndexBuffer.h"
 #include "GrResourceProvider.h"
 #include "GrStrokeInfo.h"
 #include "GrTextBlobCache.h"
 #include "GrTexturePriv.h"
 #include "GrVertexBuffer.h"
 
 #include "SkAutoKern.h"
 #include "SkColorPriv.h"
@@ skipping 62 matching lines @@
     unsigned b = SkColorGetB(c);
     return GrColorPackRGBA(r, g, b, 0xff);
 }
 
 };
 
 // TODO
 // Distance field text in textblobs
 
 GrAtlasTextContext::GrAtlasTextContext(GrContext* context,
+                                       GrDrawContext* drawContext,
                                        const SkDeviceProperties& properties,
-                                       bool enableDistanceFields)
-    : INHERITED(context, properties)
+                                       bool useDFT)
+    : INHERITED(context, drawContext, properties, useDFT)
     , fDistanceAdjustTable(SkNEW_ARGS(DistanceAdjustTable, (properties.gamma()))) {
     // We overallocate vertices in our textblobs based on the assumption that A8 has the greatest
     // vertexStride
     SK_COMPILE_ASSERT(kGrayTextVASize >= kColorTextVASize && kGrayTextVASize >= kLCDTextVASize,
                       vertex_attribute_changed);
     fCurrStrike = NULL;
     fCache = context->getTextBlobCache();
 
 #if SK_FORCE_DISTANCE_FIELD_TEXT
     fEnableDFRendering = true;
 #else
-    fEnableDFRendering = enableDistanceFields;
+    fEnableDFRendering = useDFT;
 #endif
 }
 
 void GrAtlasTextContext::DistanceAdjustTable::buildDistanceAdjustTable(float gamma) {
 
     // This is used for an approximation of the mask gamma hack, used by raster and bitmap
     // text. The mask gamma hack is based off of guessing what the blend color is going to
     // be, and adjusting the mask so that when run through the linear blend will
     // produce the value closest to the desired result. However, in practice this means
     // that the 'adjusted' mask is just increasing or decreasing the coverage of
@@ skipping 66 matching lines @@
                 float d = 2.0f*kDistanceFieldAAFactor*t - kDistanceFieldAAFactor;
 
                 fTable[row] = d;
                 break;
             }
         }
     }
 }
 
 GrAtlasTextContext* GrAtlasTextContext::Create(GrContext* context,
+                                               GrDrawContext* drawContext,
                                                const SkDeviceProperties& props,
-                                               bool enableDistanceFields) {
-    return SkNEW_ARGS(GrAtlasTextContext, (context, props, enableDistanceFields));
+                                               bool useDFT) {
+    return SkNEW_ARGS(GrAtlasTextContext, (context, drawContext, props, useDFT));
 }
 
 bool GrAtlasTextContext::canDraw(const GrRenderTarget*,
                                  const GrClip&,
                                  const GrPaint&,
                                  const SkPaint& skPaint,
                                  const SkMatrix& viewMatrix) {
     return this->canDrawAsDistanceFields(skPaint, viewMatrix) ||
            !SkDraw::ShouldDrawTextAsPaths(skPaint, viewMatrix);
 }
@@ skipping 135 matching lines @@
 void GrAtlasTextContext::drawTextBlob(GrRenderTarget* rt,
                                       const GrClip& clip, const SkPaint& skPaint,
                                       const SkMatrix& viewMatrix, const SkTextBlob* blob,
                                       SkScalar x, SkScalar y,
                                       SkDrawFilter* drawFilter, const SkIRect& clipBounds) {
     // If we have been abandoned, then don't draw
     if (fContext->abandoned()) {
         return;
     }
 
-    GrDrawContext* drawContext = fContext->drawContext();
-    if (!drawContext) {
-        return;
-    }
-
     SkAutoTUnref<BitmapTextBlob> cacheBlob;
     SkMaskFilter::BlurRec blurRec;
     BitmapTextBlob::Key key;
     // It might be worth caching these things, but its not clear at this time
     // TODO for animated mask filters, this will fill up our cache.  We need a safeguard here
     const SkMaskFilter* mf = skPaint.getMaskFilter();
     bool canCache = !(skPaint.getPathEffect() ||
                       (mf && !mf->asABlur(&blurRec)) ||
                       drawFilter);
 
@@ skipping 54 matching lines @@
             cacheBlob.reset(SkRef(fCache->createCachedBlob(blob, key, blurRec, skPaint,
                                                            kGrayTextVASize)));
         } else {
             cacheBlob.reset(fCache->createBlob(blob, kGrayTextVASize));
         }
         this->regenerateTextBlob(cacheBlob, skPaint, grPaint.getColor(), viewMatrix,
                                  blob, x, y, drawFilter, clipRect, rt, clip, grPaint);
     }
 
     cacheBlob->fPaintColor = skPaint.getColor();
-    this->flush(drawContext, blob, cacheBlob, rt, skPaint, grPaint, drawFilter,
+    this->flush(blob, cacheBlob, rt, skPaint, grPaint, drawFilter,
                 clip, viewMatrix, clipBounds, x, y, transX, transY);
 }
 
 inline bool GrAtlasTextContext::canDrawAsDistanceFields(const SkPaint& skPaint,
                                                         const SkMatrix& viewMatrix) {
     // TODO: support perspective (need getMaxScale replacement)
     if (viewMatrix.hasPerspective()) {
         return false;
     }
 
@@ skipping 321 matching lines @@
         blob = fCache->createBlob(glyphCount, 1, kGrayTextVASize);
         blob->fViewMatrix = viewMatrix;
         SkGlyphCache* cache = this->setupCache(&blob->fRuns[0], skPaint, &viewMatrix, false);
         this->internalDrawBMPPosText(blob, 0, cache, skPaint, paint.getColor(), viewMatrix, text,
                                      byteLength, pos, scalarsPerPosition, offset, clipRect);
         SkGlyphCache::AttachCache(cache);
     }
     return blob;
 }
 
-void GrAtlasTextContext::onDrawText(GrDrawContext* drawContext, GrRenderTarget* rt,
+void GrAtlasTextContext::onDrawText(GrRenderTarget* rt,
                                     const GrClip& clip, 
                                     const GrPaint& paint, const SkPaint& skPaint,
                                     const SkMatrix& viewMatrix,
                                     const char text[], size_t byteLength,
                                     SkScalar x, SkScalar y, const SkIRect& regionClipBounds) {
-    if (drawContext) {
-        SkAutoTUnref<BitmapTextBlob> blob(
-            this->createDrawTextBlob(rt, clip, paint, skPaint, viewMatrix,
-                                     text, byteLength, x, y, regionClipBounds));
-        this->flush(drawContext, blob, rt, skPaint, paint, clip, regionClipBounds);
-    }
+    SkAutoTUnref<BitmapTextBlob> blob(
+        this->createDrawTextBlob(rt, clip, paint, skPaint, viewMatrix,
+                                 text, byteLength, x, y, regionClipBounds));
+    this->flush(blob, rt, skPaint, paint, clip, regionClipBounds);
 }
 
-void GrAtlasTextContext::onDrawPosText(GrDrawContext* drawContext, GrRenderTarget* rt,
+void GrAtlasTextContext::onDrawPosText(GrRenderTarget* rt,
                                        const GrClip& clip,
                                        const GrPaint& paint, const SkPaint& skPaint,
                                        const SkMatrix& viewMatrix,
                                        const char text[], size_t byteLength,
                                        const SkScalar pos[], int scalarsPerPosition,
                                        const SkPoint& offset, const SkIRect& regionClipBounds) {
-    if (drawContext) {
-        SkAutoTUnref<BitmapTextBlob> blob(
-            this->createDrawPosTextBlob(rt, clip, paint, skPaint, viewMatrix,
-                                        text, byteLength,
-                                        pos, scalarsPerPosition,
-                                        offset, regionClipBounds));
+    SkAutoTUnref<BitmapTextBlob> blob(
+        this->createDrawPosTextBlob(rt, clip, paint, skPaint, viewMatrix,
+                                    text, byteLength,
+                                    pos, scalarsPerPosition,
+                                    offset, regionClipBounds));
 
-        this->flush(drawContext, blob, rt, skPaint, paint, clip, regionClipBounds);
-    }
+    this->flush(blob, rt, skPaint, paint, clip, regionClipBounds);
 }
 
 void GrAtlasTextContext::internalDrawBMPText(BitmapTextBlob* blob, int runIndex,
                                              SkGlyphCache* cache, const SkPaint& skPaint,
                                              GrColor color,
                                              const SkMatrix& viewMatrix,
                                              const char text[], size_t byteLength,
                                              SkScalar x, SkScalar y, const SkIRect& clipRect) {
     SkASSERT(byteLength == 0 || text != NULL);
 
@@ skipping 1218 matching lines @@
 
     // Distance field properties
     SkAutoTUnref<DistanceAdjustTable> fDistanceAdjustTable;
     SkColor fFilteredColor;
     bool fUseDistanceFields;
     bool fUseLCDText;
     bool fUseBGR;
     float fGamma;
 };
 
-void GrAtlasTextContext::flushRunAsPaths(GrDrawContext* drawContext,
-                                         GrRenderTarget* rt, const SkTextBlob::RunIterator& it, 
+void GrAtlasTextContext::flushRunAsPaths(GrRenderTarget* rt, const SkTextBlob::RunIterator& it, 
                                          const GrClip& clip, const SkPaint& skPaint,
                                          SkDrawFilter* drawFilter, const SkMatrix& viewMatrix,
                                          const SkIRect& clipBounds, SkScalar x, SkScalar y) {
     SkPaint runPaint = skPaint;
 
     size_t textLen = it.glyphCount() * sizeof(uint16_t);
     const SkPoint& offset = it.offset();
 
     it.applyFontToPaint(&runPaint);
 
     if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) {
         return;
     }
 
     runPaint.setFlags(FilterTextFlags(fDeviceProperties, runPaint));
 
     switch (it.positioning()) {
         case SkTextBlob::kDefault_Positioning:
-            this->drawTextAsPath(drawContext, rt, clip, runPaint, viewMatrix,
+            this->drawTextAsPath(rt, clip, runPaint, viewMatrix,
                                  (const char *)it.glyphs(),
                                  textLen, x + offset.x(), y + offset.y(), clipBounds);
             break;
         case SkTextBlob::kHorizontal_Positioning:
-            this->drawPosTextAsPath(drawContext, rt, clip, runPaint, viewMatrix,
+            this->drawPosTextAsPath(rt, clip, runPaint, viewMatrix,
                                     (const char*)it.glyphs(),
                                     textLen, it.pos(), 1, SkPoint::Make(x, y + offset.y()),
                                     clipBounds);
             break;
         case SkTextBlob::kFull_Positioning:
-            this->drawPosTextAsPath(drawContext, rt, clip, runPaint, viewMatrix,
+            this->drawPosTextAsPath(rt, clip, runPaint, viewMatrix,
                                     (const char*)it.glyphs(),
                                     textLen, it.pos(), 2, SkPoint::Make(x, y), clipBounds);
             break;
     }
 }
 
 
 inline BitmapTextBatch*
 GrAtlasTextContext::createBatch(BitmapTextBlob* cacheBlob, const PerSubRunInfo& info,
                                 int glyphCount, int run, int subRun,
@@ skipping 31 matching lines @@
     geometry.fRun = run;
     geometry.fSubRun = subRun;
     geometry.fColor = subRunColor;
     geometry.fTransX = transX;
     geometry.fTransY = transY;
     batch->init();
 
     return batch;
 }
 
-inline void GrAtlasTextContext::flushRun(GrDrawContext* drawContext,
-                                         GrPipelineBuilder* pipelineBuilder,
+inline void GrAtlasTextContext::flushRun(GrPipelineBuilder* pipelineBuilder,
                                          BitmapTextBlob* cacheBlob, int run, GrColor color,
                                          SkScalar transX, SkScalar transY,
                                          const SkPaint& skPaint) {
     for (int subRun = 0; subRun < cacheBlob->fRuns[run].fSubRunInfo.count(); subRun++) {
         const PerSubRunInfo& info = cacheBlob->fRuns[run].fSubRunInfo[subRun];
         int glyphCount = info.fGlyphEndIndex - info.fGlyphStartIndex;
         if (0 == glyphCount) {
             continue;
         }
 
         SkAutoTUnref<BitmapTextBatch> batch(this->createBatch(cacheBlob, info, glyphCount, run,
                                                               subRun, color, transX, transY,
                                                               skPaint));
-        drawContext->drawText(pipelineBuilder, batch);
+        fDrawContext->drawBatch(pipelineBuilder, batch);
     }
 }
 
-inline void GrAtlasTextContext::flushBigGlyphs(BitmapTextBlob* cacheBlob,
-                                               GrDrawContext* drawContext, GrRenderTarget* rt,
+inline void GrAtlasTextContext::flushBigGlyphs(BitmapTextBlob* cacheBlob, GrRenderTarget* rt,
                                                const GrClip& clip, const SkPaint& skPaint,
                                                SkScalar transX, SkScalar transY,
                                                const SkIRect& clipBounds) {
     if (!cacheBlob->fBigGlyphs.count()) {
         return;
     }
 
     SkMatrix pathMatrix;
     if (!cacheBlob->fViewMatrix.invert(&pathMatrix)) {
         SkDebugf("could not invert viewmatrix\n");
         return;
     }
 
     for (int i = 0; i < cacheBlob->fBigGlyphs.count(); i++) {
         BitmapTextBlob::BigGlyph& bigGlyph = cacheBlob->fBigGlyphs[i];
         bigGlyph.fVx += transX;
         bigGlyph.fVy += transY;
         SkMatrix translate = cacheBlob->fViewMatrix;
         translate.postTranslate(bigGlyph.fVx, bigGlyph.fVy);
 
-        GrBlurUtils::drawPathWithMaskFilter(fContext, drawContext, rt, clip, bigGlyph.fPath,
+        GrBlurUtils::drawPathWithMaskFilter(fContext, fDrawContext, rt, clip, bigGlyph.fPath,
                                             skPaint, translate, &pathMatrix, clipBounds, false);
     }
 }
 
-void GrAtlasTextContext::flush(GrDrawContext* drawContext,
-                               const SkTextBlob* blob,
+void GrAtlasTextContext::flush(const SkTextBlob* blob,
                                BitmapTextBlob* cacheBlob,
                                GrRenderTarget* rt,
                                const SkPaint& skPaint,
                                const GrPaint& grPaint,
                                SkDrawFilter* drawFilter,
                                const GrClip& clip,
                                const SkMatrix& viewMatrix,
                                const SkIRect& clipBounds,
                                SkScalar x, SkScalar y,
                                SkScalar transX, SkScalar transY) {
     // We loop through the runs of the blob, flushing each.  If any run is too large, then we flush
     // it as paths
     GrPipelineBuilder pipelineBuilder;
     pipelineBuilder.setFromPaint(grPaint, rt, clip);
 
     GrColor color = grPaint.getColor();
 
     SkTextBlob::RunIterator it(blob);
     for (int run = 0; !it.done(); it.next(), run++) {
         if (cacheBlob->fRuns[run].fDrawAsPaths) {
-            this->flushRunAsPaths(drawContext, rt, it, clip, skPaint,
+            this->flushRunAsPaths(rt, it, clip, skPaint,
                                   drawFilter, viewMatrix, clipBounds, x, y);
             continue;
         }
         cacheBlob->fRuns[run].fVertexBounds.offset(transX, transY);
-        this->flushRun(drawContext, &pipelineBuilder, cacheBlob, run, color,
+        this->flushRun(&pipelineBuilder, cacheBlob, run, color,
                        transX, transY, skPaint);
     }
 
     // Now flush big glyphs
-    this->flushBigGlyphs(cacheBlob, drawContext, rt, clip, skPaint, transX, transY, clipBounds);
+    this->flushBigGlyphs(cacheBlob, rt, clip, skPaint, transX, transY, clipBounds);
 }
 
-void GrAtlasTextContext::flush(GrDrawContext* drawContext,
-                               BitmapTextBlob* cacheBlob,
+void GrAtlasTextContext::flush(BitmapTextBlob* cacheBlob,
                                GrRenderTarget* rt,
                                const SkPaint& skPaint,
                                const GrPaint& grPaint,
                                const GrClip& clip,
                                const SkIRect& clipBounds) {
     GrPipelineBuilder pipelineBuilder;
     pipelineBuilder.setFromPaint(grPaint, rt, clip);
 
     GrColor color = grPaint.getColor();
     for (int run = 0; run < cacheBlob->fRunCount; run++) {
-        this->flushRun(drawContext, &pipelineBuilder, cacheBlob, run, color, 0, 0, skPaint);
+        this->flushRun(&pipelineBuilder, cacheBlob, run, color, 0, 0, skPaint);
     }
 
     // Now flush big glyphs
-    this->flushBigGlyphs(cacheBlob, drawContext, rt, clip, skPaint, 0, 0, clipBounds);
+    this->flushBigGlyphs(cacheBlob, rt, clip, skPaint, 0, 0, clipBounds);
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #ifdef GR_TEST_UTILS
 
 BATCH_TEST_DEFINE(TextBlobBatch) {
     static uint32_t gContextID = SK_InvalidGenID;
     static GrAtlasTextContext* gTextContext = NULL;
-    static SkDeviceProperties gDeviceProperties(SkDeviceProperties::kLegacyLCD_InitType);
+    static SkDeviceProperties gDevProperties;
 
     if (context->uniqueID() != gContextID) {
         gContextID = context->uniqueID();
         SkDELETE(gTextContext);
+
+        static const bool kUseDFT = false;
         // We don't yet test the fall back to paths in the GrTextContext base class.  This is mostly
         // because we don't really want to have a gpu device here.
         // We enable distance fields by twiddling a knob on the paint
-        gTextContext = GrAtlasTextContext::Create(context, gDeviceProperties, false);
+        GrDrawContext* drawContext = context->drawContext(&gDevProperties, kUseDFT);
+
+        gTextContext = GrAtlasTextContext::Create(context, drawContext, gDevProperties, kUseDFT);
     }
 
     // create dummy render target
     GrSurfaceDesc desc;
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = 1024;
     desc.fHeight = 1024;
     desc.fConfig = kRGBA_8888_GrPixelConfig;
     desc.fSampleCnt = 0;
     SkAutoTUnref<GrTexture> texture(context->textureProvider()->createTexture(desc, true, NULL, 0));
@@ skipping 29 matching lines @@
             gTextContext->createDrawTextBlob(rt, clip, grPaint, skPaint, viewMatrix, text,
                                              static_cast<size_t>(textLen), 0, 0, noClip));
 
     SkScalar transX = static_cast<SkScalar>(random->nextU());
     SkScalar transY = static_cast<SkScalar>(random->nextU());
     const GrAtlasTextContext::BitmapTextBlob::Run::SubRunInfo& info = blob->fRuns[0].fSubRunInfo[0];
     return gTextContext->createBatch(blob, info, textLen, 0, 0, color, transX, transY, skPaint);
 }
 
 #endif