gfx/skia/trunk/src/image/SkSurface_Raster.cpp@129ffea94266
gfx/skia/trunk/src/image/SkSurface_Raster.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
8 #include "SkSurface_Base.h"
9 #include "SkImagePriv.h"
10 #include "SkCanvas.h"
11 #include "SkDevice.h"
12 #include "SkMallocPixelRef.h"
14 static const size_t kIgnoreRowBytesValue = (size_t)~0;
16 class SkSurface_Raster : public SkSurface_Base {
17 public:
18 static bool Valid(const SkImageInfo&, size_t rb = kIgnoreRowBytesValue);
20 SkSurface_Raster(const SkImageInfo&, void*, size_t rb);
21 SkSurface_Raster(SkPixelRef*);
23 virtual SkCanvas* onNewCanvas() SK_OVERRIDE;
24 virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
25 virtual SkImage* onNewImageSnapshot() SK_OVERRIDE;
26 virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
27 const SkPaint*) SK_OVERRIDE;
28 virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;
30 private:
31 SkBitmap fBitmap;
32 bool fWeOwnThePixels;
34 typedef SkSurface_Base INHERITED;
35 };
37 ///////////////////////////////////////////////////////////////////////////////
39 bool SkSurface_Raster::Valid(const SkImageInfo& info, size_t rowBytes) {
40 static const size_t kMaxTotalSize = SK_MaxS32;
42 int shift = 0;
43 switch (info.fColorType) {
44 case kAlpha_8_SkColorType:
45 shift = 0;
46 break;
47 case kRGB_565_SkColorType:
48 shift = 1;
49 break;
50 case kPMColor_SkColorType:
51 shift = 2;
52 break;
53 default:
54 return false;
55 }
57 if (kIgnoreRowBytesValue == rowBytes) {
58 return true;
59 }
61 uint64_t minRB = (uint64_t)info.fWidth << shift;
62 if (minRB > rowBytes) {
63 return false;
64 }
66 size_t alignedRowBytes = rowBytes >> shift << shift;
67 if (alignedRowBytes != rowBytes) {
68 return false;
69 }
71 uint64_t size = sk_64_mul(info.fHeight, rowBytes);
72 if (size > kMaxTotalSize) {
73 return false;
74 }
76 return true;
77 }
79 SkSurface_Raster::SkSurface_Raster(const SkImageInfo& info, void* pixels, size_t rb)
80 : INHERITED(info)
81 {
82 fBitmap.setConfig(info, rb);
83 fBitmap.setPixels(pixels);
84 fWeOwnThePixels = false; // We are "Direct"
85 }
87 SkSurface_Raster::SkSurface_Raster(SkPixelRef* pr)
88 : INHERITED(pr->info().fWidth, pr->info().fHeight)
89 {
90 const SkImageInfo& info = pr->info();
92 fBitmap.setConfig(info, info.minRowBytes());
93 fBitmap.setPixelRef(pr);
94 fWeOwnThePixels = true;
96 if (!info.isOpaque()) {
97 fBitmap.eraseColor(SK_ColorTRANSPARENT);
98 }
99 }
101 SkCanvas* SkSurface_Raster::onNewCanvas() {
102 return SkNEW_ARGS(SkCanvas, (fBitmap));
103 }
105 SkSurface* SkSurface_Raster::onNewSurface(const SkImageInfo& info) {
106 return SkSurface::NewRaster(info);
107 }
109 void SkSurface_Raster::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
110 const SkPaint* paint) {
111 canvas->drawBitmap(fBitmap, x, y, paint);
112 }
114 SkImage* SkSurface_Raster::onNewImageSnapshot() {
115 return SkNewImageFromBitmap(fBitmap, fWeOwnThePixels);
116 }
118 void SkSurface_Raster::onCopyOnWrite(ContentChangeMode mode) {
119 // are we sharing pixelrefs with the image?
120 SkASSERT(NULL != this->getCachedImage());
121 if (SkBitmapImageGetPixelRef(this->getCachedImage()) == fBitmap.pixelRef()) {
122 SkASSERT(fWeOwnThePixels);
123 if (kDiscard_ContentChangeMode == mode) {
124 fBitmap.setPixelRef(NULL);
125 fBitmap.allocPixels();
126 } else {
127 SkBitmap prev(fBitmap);
128 prev.deepCopyTo(&fBitmap);
129 }
130 // Now fBitmap is a deep copy of itself (and therefore different from
131 // what is being used by the image. Next we update the canvas to use
132 // this as its backend, so we can't modify the image's pixels anymore.
133 SkASSERT(NULL != this->getCachedCanvas());
134 this->getCachedCanvas()->getDevice()->replaceBitmapBackendForRasterSurface(fBitmap);
135 }
136 }
138 ///////////////////////////////////////////////////////////////////////////////
140 SkSurface* SkSurface::NewRasterDirect(const SkImageInfo& info, void* pixels, size_t rowBytes) {
141 if (!SkSurface_Raster::Valid(info, rowBytes)) {
142 return NULL;
143 }
144 if (NULL == pixels) {
145 return NULL;
146 }
148 return SkNEW_ARGS(SkSurface_Raster, (info, pixels, rowBytes));
149 }
151 SkSurface* SkSurface::NewRaster(const SkImageInfo& info) {
152 if (!SkSurface_Raster::Valid(info)) {
153 return NULL;
154 }
156 SkAutoTUnref<SkPixelRef> pr(SkMallocPixelRef::NewAllocate(info, 0, NULL));
157 if (NULL == pr.get()) {
158 return NULL;
159 }
160 return SkNEW_ARGS(SkSurface_Raster, (pr));
161 }
