Proposed SkCanvas API for preLoading textures to VRAM

src/core/SkPicturePlayback.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include <new>
 #include "SkBBoxHierarchy.h"
 #include "SkOffsetTable.h"
@@ skipping 707 matching lines @@
         if (MASK_24 == *size) {
             *size = reader->readInt();
         }
     }
     return (DrawType) op;
 }
 
 // The activeOps parameter is actually "const SkTDArray<SkPictureStateTree::Draw*>&".
 // It represents the operations about to be drawn, as generated by some spatial
 // subdivision helper class. It should already be in 'fOffset' sorted order.
-void SkPicturePlayback::preLoadBitmaps(const SkTDArray<void*>& activeOps) {
+void SkPicturePlayback::preLoadBitmaps(SkCanvas& canvas, const SkTDArray<void*>& activeOps) {
     if (0 == activeOps.count() || NULL == fBitmapUseOffsets) {
         return;
     }
 
     SkTDArray<int> active;
 
     SkAutoTDeleteArray<bool> needToCheck(new bool[fBitmapUseOffsets->numIDs()]);
     for (int i = 0; i < fBitmapUseOffsets->numIDs(); ++i) {
         needToCheck.get()[i] = true;
     }
@@ skipping 16 matching lines @@
             if (!fBitmapUseOffsets->includes(j, draw->fOffset)) {
                 continue;
             }
 
             *active.append() = j;
             needToCheck.get()[j] = false;
         }
     }
 
     for (int i = 0; i < active.count(); ++i) {
-        SkDebugf("preload texture %d\n", active[i]);
+        SkASSERT(SkBitmapHeap::INVALID_SLOT != active[i]);
+        canvas.internalPrivate_PreLoad((*fBitmaps)[active[i]], SkIRect::MakeWH(0, 0));
     }
 }
 
 void SkPicturePlayback::draw(SkCanvas& canvas, SkDrawPictureCallback* callback) {
 #ifdef ENABLE_TIME_DRAW
     SkAutoTime  at("SkPicture::draw", 50);
 #endif
 
 #ifdef SPEW_CLIP_SKIPPING
     SkipClipRec skipRect, skipRRect, skipRegion, skipPath, skipCull;
@@ skipping 32 matching lines @@
         fStateTree->getIterator(activeOps, &canvas);
 
     if (it.isValid()) {
         uint32_t skipTo = it.draw();
         if (kDrawComplete == skipTo) {
             return;
         }
         reader.setOffset(skipTo);
     }
 
-    this->preLoadBitmaps(activeOps);
+    this->preLoadBitmaps(canvas, activeOps);
 
     // Record this, so we can concat w/ it if we encounter a setMatrix()
     SkMatrix initialMatrix = canvas.getTotalMatrix();
     int originalSaveCount = canvas.getSaveCount();
 
 #ifdef SK_BUILD_FOR_ANDROID
     fAbortCurrentPlayback = false;
 #endif
 
 #ifdef SK_DEVELOPER
@@ skipping 901 matching lines @@
     for (index = 0; index < fPictureCount; index++)
         bufferPtr += snprintf(bufferPtr, DUMP_BUFFER_SIZE - (bufferPtr - pBuffer),
             "picture%p, ", fPictureRefs[index]);
     if (fPictureCount > 0)
         SkDebugf("%s0};\n", pBuffer);
 
     const_cast<SkPicturePlayback*>(this)->dumpStream();
 }
 
 #endif