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Side by Side Diff: src/core/SkCanvas.cpp

Issue 161733002: add peekPixels to SkCanvas and SkSurface (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Created 6 years, 10 months ago
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1 1
2 /* 2 /*
3 * Copyright 2008 The Android Open Source Project 3 * Copyright 2008 The Android Open Source Project
4 * 4 *
5 * Use of this source code is governed by a BSD-style license that can be 5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file. 6 * found in the LICENSE file.
7 */ 7 */
8 8
9 9
10 #include "SkCanvas.h" 10 #include "SkCanvas.h"
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985 985
986 SkSurface* SkCanvas::newSurface(const SkImageInfo& info) { 986 SkSurface* SkCanvas::newSurface(const SkImageInfo& info) {
987 return this->onNewSurface(info); 987 return this->onNewSurface(info);
988 } 988 }
989 989
990 SkSurface* SkCanvas::onNewSurface(const SkImageInfo& info) { 990 SkSurface* SkCanvas::onNewSurface(const SkImageInfo& info) {
991 SkBaseDevice* dev = this->getDevice(); 991 SkBaseDevice* dev = this->getDevice();
992 return dev ? dev->newSurface(info) : NULL; 992 return dev ? dev->newSurface(info) : NULL;
993 } 993 }
994 994
995 SkImageInfo SkCanvas::imageInfo() const {
996 SkBaseDevice* dev = this->getDevice();
997 if (dev) {
998 return dev->imageInfo();
999 } else {
1000 // TODO: need a real unknown for alphatype it seems.
1001 SkAlphaType unknownAlphaType = kIgnore_SkAlphaType;
1002 return SkImageInfo::Make(0, 0, kUnknown_SkColorType, unknownAlphaType);
1003 }
1004 }
1005
1006 const void* SkCanvas::peekPixels(SkImageInfo* info, size_t* rowBytes) {
1007 return this->onPeekPixels(info, rowBytes);
1008 }
1009
1010 const void* SkCanvas::onPeekPixels(SkImageInfo* info, size_t* rowBytes) {
1011 SkBaseDevice* dev = this->getDevice();
1012 return dev ? dev->peekPixels(info, rowBytes) : NULL;
1013 }
1014
1015 SkAutoROCanvasPixels::SkAutoROCanvasPixels(SkCanvas* canvas) {
1016 fAddr = canvas->peekPixels(&fInfo, &fRowBytes);
1017 if (NULL == fAddr) {
1018 fInfo = canvas->imageInfo();
1019 if (kUnknown_SkColorType == fInfo.colorType() ||
1020 !fBitmap.allocPixels(fInfo))
1021 {
1022 return; // failure, fAddr is NULL
1023 }
1024 fBitmap.lockPixels();
1025 if (!canvas->readPixels(&fBitmap, 0, 0)) {
1026 return; // failure, fAddr is NULL
1027 }
1028 fAddr = fBitmap.getPixels();
1029 fRowBytes = fBitmap.rowBytes();
1030 }
1031 SkASSERT(fAddr); // success
1032 }
1033
1034 bool SkAutoROCanvasPixels::asROBitmap(SkBitmap* bitmap) const {
1035 if (fAddr) {
1036 return bitmap->installPixels(fInfo, const_cast<void*>(fAddr), fRowBytes,
1037 NULL, NULL);
1038 } else {
1039 bitmap->reset();
1040 return false;
1041 }
1042 }
1043
995 ///////////////////////////////////////////////////////////////////////////// 1044 /////////////////////////////////////////////////////////////////////////////
996 1045
997 void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap, 1046 void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap,
998 const SkMatrix& matrix, const SkPaint* paint) { 1047 const SkMatrix& matrix, const SkPaint* paint) {
999 if (bitmap.drawsNothing()) { 1048 if (bitmap.drawsNothing()) {
1000 return; 1049 return;
1001 } 1050 }
1002 1051
1003 SkLazyPaint lazy; 1052 SkLazyPaint lazy;
1004 if (NULL == paint) { 1053 if (NULL == paint) {
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2232 return *paint; 2281 return *paint;
2233 } 2282 }
2234 2283
2235 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); } 2284 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); }
2236 int SkCanvas::LayerIter::x() const { return fImpl->getX(); } 2285 int SkCanvas::LayerIter::x() const { return fImpl->getX(); }
2237 int SkCanvas::LayerIter::y() const { return fImpl->getY(); } 2286 int SkCanvas::LayerIter::y() const { return fImpl->getY(); }
2238 2287
2239 /////////////////////////////////////////////////////////////////////////////// 2288 ///////////////////////////////////////////////////////////////////////////////
2240 2289
2241 SkCanvas::ClipVisitor::~ClipVisitor() { } 2290 SkCanvas::ClipVisitor::~ClipVisitor() { }
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