Add literal picture recording mode, triggered by a compile time switch.

src/core/SkPictureRecord.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 "SkPictureRecord.h"
 #include "SkTSearch.h"
 #include "SkPixelRef.h"
 #include "SkRRect.h"
 #include "SkBBoxHierarchy.h"
 #include "SkDevice.h"
 #include "SkPictureStateTree.h"
 
 #define HEAP_BLOCK_SIZE 4096
 
+// If SK_RECORD_LITERAL_PICTURES is defined, record our inputs as literally as possible.
+// Otherwise, we can be clever and record faster equivalents.  kBeClever is normally true.
+static const bool kBeClever =
+#ifdef SK_RECORD_LITERAL_PICTURES
+    false;
+#else
+    true;
+#endif
+
 enum {
     // just need a value that save or getSaveCount would never return
     kNoInitialSave = -1,
 };
 
 // A lot of basic types get stored as a uint32_t: bools, ints, paint indices, etc.
 static int const kUInt32Size = 4;
 
 static const uint32_t kSaveSize = 2 * kUInt32Size;
 static const uint32_t kSaveLayerNoBoundsSize = 4 * kUInt32Size;
 static const uint32_t kSaveLayerWithBoundsSize = 4 * kUInt32Size + sizeof(SkRect);
 
 SkPictureRecord::SkPictureRecord(const SkISize& dimensions, uint32_t flags)
     : INHERITED(dimensions.width(), dimensions.height())
     , fBoundingHierarchy(NULL)
     , fStateTree(NULL)
     , fFlattenableHeap(HEAP_BLOCK_SIZE)
     , fPaints(&fFlattenableHeap)
     , fRecordFlags(flags)
-    , fOptsEnabled(true) {
+    , fOptsEnabled(kBeClever) {
 #ifdef SK_DEBUG_SIZE
     fPointBytes = fRectBytes = fTextBytes = 0;
     fPointWrites = fRectWrites = fTextWrites = 0;
 #endif
 
     fBitmapHeap = SkNEW(SkBitmapHeap);
     fFlattenableHeap.setBitmapStorage(fBitmapHeap);
     fPathHeap = NULL;   // lazy allocate
 
 #ifndef SK_COLLAPSE_MATRIX_CLIP_STATE
@@ skipping 977 matching lines @@
     this->addRect(rect);
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::drawRRect(const SkRRect& rrect, const SkPaint& paint) {
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
 
-    if (rrect.isRect()) {
+    if (rrect.isRect() && kBeClever) {
         this->SkPictureRecord::drawRect(rrect.getBounds(), paint);
-    } else if (rrect.isOval()) {
+    } else if (rrect.isOval() && kBeClever) {
         this->SkPictureRecord::drawOval(rrect.getBounds(), paint);
     } else {
         // op + paint index + rrect
         size_t size = 2 * kUInt32Size + SkRRect::kSizeInMemory;
         size_t initialOffset = this->addDraw(DRAW_RRECT, &size);
         SkASSERT(initialOffset+getPaintOffset(DRAW_RRECT, size) == fWriter.bytesWritten());
         this->addPaint(paint);
         this->addRRect(rrect);
         this->validate(initialOffset, size);
     }
@@ skipping 26 matching lines @@
     size_t size = 3 * kUInt32Size;
     size_t initialOffset = this->addDraw(DRAW_PATH, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_PATH, size) == fWriter.bytesWritten());
     this->addPaint(paint);
     this->addPath(path);
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
                                  const SkPaint* paint = NULL) {
-    if (bitmap.drawsNothing()) {
+    if (bitmap.drawsNothing() && kBeClever) {
         return;
     }
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
 
     // op + paint index + bitmap index + left + top
     size_t size = 3 * kUInt32Size + 2 * sizeof(SkScalar);
     size_t initialOffset = this->addDraw(DRAW_BITMAP, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_BITMAP, size) == fWriter.bytesWritten());
     this->addPaintPtr(paint);
     this->addBitmap(bitmap);
     this->addScalar(left);
     this->addScalar(top);
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
                                            const SkRect& dst, const SkPaint* paint,
                                            DrawBitmapRectFlags flags) {
-    if (bitmap.drawsNothing()) {
+    if (bitmap.drawsNothing() && kBeClever) {
         return;
     }
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
     // id + paint index + bitmap index + bool for 'src' + flags
     size_t size = 5 * kUInt32Size;
     if (NULL != src) {
         size += sizeof(*src);   // + rect
     }
     size += sizeof(dst);        // + rect
 
     size_t initialOffset = this->addDraw(DRAW_BITMAP_RECT_TO_RECT, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_BITMAP_RECT_TO_RECT, size)
              == fWriter.bytesWritten());
     this->addPaintPtr(paint);
     this->addBitmap(bitmap);
     this->addRectPtr(src);  // may be null
     this->addRect(dst);
     this->addInt(flags);
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix,
                                        const SkPaint* paint) {
-    if (bitmap.drawsNothing()) {
+    if (bitmap.drawsNothing() && kBeClever) {
         return;
     }
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
 
     // id + paint index + bitmap index + matrix
     size_t size = 3 * kUInt32Size + matrix.writeToMemory(NULL);
     size_t initialOffset = this->addDraw(DRAW_BITMAP_MATRIX, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_BITMAP_MATRIX, size) == fWriter.bytesWritten());
     this->addPaintPtr(paint);
     this->addBitmap(bitmap);
     this->addMatrix(matrix);
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
                                      const SkRect& dst, const SkPaint* paint) {
-    if (bitmap.drawsNothing()) {
+    if (bitmap.drawsNothing() && kBeClever) {
         return;
     }
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
 
     // op + paint index + bitmap id + center + dst rect
     size_t size = 3 * kUInt32Size + sizeof(center) + sizeof(dst);
     size_t initialOffset = this->addDraw(DRAW_BITMAP_NINE, &size);
     SkASSERT(initialOffset+getPaintOffset(DRAW_BITMAP_NINE, size) == fWriter.bytesWritten());
     this->addPaintPtr(paint);
     this->addBitmap(bitmap);
     this->addIRect(center);
     this->addRect(dst);
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::drawSprite(const SkBitmap& bitmap, int left, int top,
                                  const SkPaint* paint = NULL) {
-    if (bitmap.drawsNothing()) {
+    if (bitmap.drawsNothing() && kBeClever) {
         return;
     }
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
 
     // op + paint index + bitmap index + left + top
     size_t size = 5 * kUInt32Size;
     size_t initialOffset = this->addDraw(DRAW_SPRITE, &size);
@@ skipping 24 matching lines @@
     this->addScalar(flat.topBot()[1] + maxY);
 }
 
 void SkPictureRecord::drawText(const void* text, size_t byteLength, SkScalar x,
                       SkScalar y, const SkPaint& paint) {
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     fMCMgr.call(SkMatrixClipStateMgr::kOther_CallType);
 #endif
 
-    bool fast = !paint.isVerticalText() && paint.canComputeFastBounds();
+    bool fast = !paint.isVerticalText() && paint.canComputeFastBounds() && kBeClever;
 
     // op + paint index + length + 'length' worth of chars + x + y
     size_t size = 3 * kUInt32Size + SkAlign4(byteLength) + 2 * sizeof(SkScalar);
     if (fast) {
         size += 2 * sizeof(SkScalar); // + top & bottom
     }
 
     DrawType op = fast ? DRAW_TEXT_TOP_BOTTOM : DRAW_TEXT;
     size_t initialOffset = this->addDraw(op, &size);
     SkASSERT(initialOffset+getPaintOffset(op, size) == fWriter.bytesWritten());
@@ skipping 30 matching lines @@
                 canUseDrawH = false;
                 if (pos[index].fY < minY) {
                     minY = pos[index].fY;
                 } else if (pos[index].fY > maxY) {
                     maxY = pos[index].fY;
                 }
             }
         }
     }
 
-    bool fastBounds = !paint.isVerticalText() && paint.canComputeFastBounds();
-    bool fast = canUseDrawH && fastBounds;
+    bool fastBounds = !paint.isVerticalText() && paint.canComputeFastBounds() && kBeClever;
+    bool fast = canUseDrawH && fastBounds && kBeClever;
 
     // op + paint index + length + 'length' worth of data + num points
     size_t size = 3 * kUInt32Size + SkAlign4(byteLength) + 1 * kUInt32Size;
     if (canUseDrawH) {
         if (fast) {
             size += 2 * sizeof(SkScalar); // + top & bottom
         }
         // + y-pos + actual x-point data
         size += sizeof(SkScalar) + points * sizeof(SkScalar);
     } else {
@@ skipping 54 matching lines @@
 #endif
 
     const SkFlatData* flatPaintData = this->getFlatPaintData(paint);
     this->drawPosTextHImpl(text, byteLength, xpos, constY, paint, flatPaintData);
 }
 
 void SkPictureRecord::drawPosTextHImpl(const void* text, size_t byteLength,
                           const SkScalar xpos[], SkScalar constY,
                           const SkPaint& paint, const SkFlatData* flatPaintData) {
     int points = paint.countText(text, byteLength);
-    if (0 == points)
+    if (0 == points && kBeClever) {
         return;
+    }
 
-    bool fast = !paint.isVerticalText() && paint.canComputeFastBounds();
+    bool fast = !paint.isVerticalText() && paint.canComputeFastBounds() && kBeClever;
 
     // op + paint index + length + 'length' worth of data + num points
     size_t size = 3 * kUInt32Size + SkAlign4(byteLength) + 1 * kUInt32Size;
     if (fast) {
         size += 2 * sizeof(SkScalar); // + top & bottom
     }
     // + y + the actual points
     size += 1 * kUInt32Size + points * sizeof(SkScalar);
     size_t initialOffset = this->addDraw(fast ? DRAW_POS_TEXT_H_TOP_BOTTOM : DRAW_POS_TEXT_H,
                                          &size);
@@ skipping 174 matching lines @@
     this->validate(initialOffset, size);
 }
 
 void SkPictureRecord::onPopCull() {
     SkASSERT(!fCullOffsetStack.isEmpty());
 
     uint32_t cullSkipOffset = fCullOffsetStack.top();
     fCullOffsetStack.pop();
 
     // Collapse empty push/pop pairs.
-    if ((size_t)(cullSkipOffset + kUInt32Size) == fWriter.bytesWritten()) {
+    if ((size_t)(cullSkipOffset + kUInt32Size) == fWriter.bytesWritten() && kBeClever) {
         SkASSERT(fWriter.bytesWritten() >= kPushCullOpSize);
         SkASSERT(PUSH_CULL == peek_op(&fWriter, fWriter.bytesWritten() - kPushCullOpSize));
         fWriter.rewindToOffset(fWriter.bytesWritten() - kPushCullOpSize);
         return;
     }
 
     // op only
     size_t size = kUInt32Size;
     size_t initialOffset = this->addDraw(POP_CULL, &size);
 
@@ skipping 256 matching lines @@
 void SkPictureRecord::validateRegions() const {
     int count = fRegions.count();
     SkASSERT((unsigned) count < 0x1000);
     for (int index = 0; index < count; index++) {
         const SkFlatData* region = fRegions[index];
         SkASSERT(region);
 //        region->validate();
     }
 }
 #endif