Split drawing functionality out of GrContext and into new 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 "GrDefaultGeoProcFactory.h"
-#include "GrDrawTarget.h"
+#include "GrDrawContext.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 318 matching lines @@
     skPaint.getScalerContextDescriptor(&run->fDescriptor, &fDeviceProperties, viewMatrix, noGamma);
     run->fTypeface.reset(SkSafeRef(skPaint.getTypeface()));
     return SkGlyphCache::DetachCache(run->fTypeface, run->fDescriptor.getDesc());
 }
 
 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->getTextTarget()) {
+    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(fContext->getTextTarget(), blob, cacheBlob, rt, skPaint, grPaint, drawFilter,
+    this->flush(drawContext, 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;
     }
 
     SkScalar maxScale = viewMatrix.getMaxScale();
     SkScalar scaledTextSize = maxScale*skPaint.getTextSize();
     // Hinted text looks far better at small resolutions
     // Scaling up beyond 2x yields undesireable artifacts
     if (scaledTextSize < kMinDFFontSize || scaledTextSize > kLargeDFFontLimit) {
         return false;
     }
 
     if (!fEnableDFRendering && !skPaint.isDistanceFieldTextTEMP() &&
         scaledTextSize < kLargeDFFontSize) {
         return false;
     }
 
     // rasterizers and mask filters modify alpha, which doesn't
     // translate well to distance
     if (skPaint.getRasterizer() || skPaint.getMaskFilter() ||
-        !fContext->getTextTarget()->caps()->shaderCaps()->shaderDerivativeSupport()) {
+        !fContext->shaderDerivativeSupport()) {
         return false;
     }
 
     // TODO: add some stroking support
     if (skPaint.getStyle() != SkPaint::kFill_Style) {
         return false;
     }
 
     return true;
 }
@@ skipping 299 matching lines @@
         SkGlyphCache::AttachCache(cache);
     }
     return blob;
 }
 
 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) {
-    SkAutoTUnref<BitmapTextBlob> blob(
+    GrDrawContext* drawContext = fContext->drawContext();
+    if (drawContext) {
+        SkAutoTUnref<BitmapTextBlob> blob(
             this->createDrawTextBlob(rt, clip, paint, skPaint, viewMatrix,
                                      text, byteLength, x, y, regionClipBounds));
-    this->flush(fContext->getTextTarget(), blob, rt, skPaint, paint, clip, regionClipBounds);
+        this->flush(drawContext, blob, rt, skPaint, paint, clip, regionClipBounds);
+    }
 }
 
 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) {
-    SkAutoTUnref<BitmapTextBlob> blob(
+    GrDrawContext* drawContext = fContext->drawContext();
+    if (drawContext) {
+        SkAutoTUnref<BitmapTextBlob> blob(
             this->createDrawPosTextBlob(rt, clip, paint, skPaint, viewMatrix,
                                         text, byteLength,
                                         pos, scalarsPerPosition,
                                         offset, regionClipBounds));
 
-    this->flush(fContext->getTextTarget(), blob, rt, skPaint, paint, clip, regionClipBounds);
+        this->flush(drawContext, 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 1295 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(GrDrawTarget* target, GrPipelineBuilder* pipelineBuilder,
+inline void GrAtlasTextContext::flushRun(GrDrawContext* drawContext,
+                                         GrPipelineBuilder* pipelineBuilder,
                                          BitmapTextBlob* cacheBlob, int run, GrColor color,
-                                         SkScalar transX, SkScalar transY, const SkPaint& skPaint) {
+                                         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));
-        target->drawBatch(pipelineBuilder, batch);
+        drawContext->drawText(pipelineBuilder, batch);
     }
 }
 
 inline void GrAtlasTextContext::flushBigGlyphs(BitmapTextBlob* cacheBlob, GrRenderTarget* rt,
                                                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);
 
         fGpuDevice->internalDrawPath(bigGlyph.fPath, skPaint, translate, &pathMatrix, clipBounds,
                                      false);
     }
 }
 
-void GrAtlasTextContext::flush(GrDrawTarget* target,
+void GrAtlasTextContext::flush(GrDrawContext* drawContext,
                                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(it, skPaint, drawFilter, viewMatrix, clipBounds, x, y);
             continue;
         }
         cacheBlob->fRuns[run].fVertexBounds.offset(transX, transY);
-        this->flushRun(target, &pipelineBuilder, cacheBlob, run, color, transX, transY, skPaint);
+        this->flushRun(drawContext, &pipelineBuilder, cacheBlob, run, color,
+                       transX, transY, skPaint);
     }
 
     // Now flush big glyphs
     this->flushBigGlyphs(cacheBlob, rt, skPaint, transX, transY, clipBounds);
 }
 
-void GrAtlasTextContext::flush(GrDrawTarget* target,
+void GrAtlasTextContext::flush(GrDrawContext* drawContext,
                                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(target, &pipelineBuilder, cacheBlob, run, color, 0, 0, skPaint);
+        this->flushRun(drawContext, &pipelineBuilder, cacheBlob, run, color, 0, 0, skPaint);
     }
 
     // Now flush big glyphs
     this->flushBigGlyphs(cacheBlob, rt, skPaint, 0, 0, clipBounds);
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #ifdef GR_TEST_UTILS
 
@@ skipping 51 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