gfx/skia/trunk/src/image/SkSurface_Base.h@129ffea94266
gfx/skia/trunk/src/image/SkSurface_Base.h
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 #ifndef SkSurface_Base_DEFINED
9 #define SkSurface_Base_DEFINED
11 #include "SkSurface.h"
12 #include "SkCanvas.h"
14 class SkSurface_Base : public SkSurface {
15 public:
16 SkSurface_Base(int width, int height);
17 explicit SkSurface_Base(const SkImageInfo&);
18 virtual ~SkSurface_Base();
20 /**
21 * Allocate a canvas that will draw into this surface. We will cache this
22 * canvas, to return the same object to the caller multiple times. We
23 * take ownership, and will call unref() on the canvas when we go out of
24 * scope.
25 */
26 virtual SkCanvas* onNewCanvas() = 0;
28 virtual SkSurface* onNewSurface(const SkImageInfo&) = 0;
30 /**
31 * Allocate an SkImage that represents the current contents of the surface.
32 * This needs to be able to outlive the surface itself (if need be), and
33 * must faithfully represent the current contents, even if the surface
34 * is chaged after this calle (e.g. it is drawn to via its canvas).
35 */
36 virtual SkImage* onNewImageSnapshot() = 0;
38 /**
39 * Default implementation:
40 *
41 * image = this->newImageSnapshot();
42 * if (image) {
43 * image->draw(canvas, ...);
44 * image->unref();
45 * }
46 */
47 virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkPaint*);
49 /**
50 * If the surface is about to change, we call this so that our subclass
51 * can optionally fork their backend (copy-on-write) in case it was
52 * being shared with the cachedImage.
53 */
54 virtual void onCopyOnWrite(ContentChangeMode) = 0;
56 inline SkCanvas* getCachedCanvas();
57 inline SkImage* getCachedImage();
59 // called by SkSurface to compute a new genID
60 uint32_t newGenerationID();
62 private:
63 SkCanvas* fCachedCanvas;
64 SkImage* fCachedImage;
66 void aboutToDraw(ContentChangeMode mode);
67 friend class SkCanvas;
68 friend class SkSurface;
70 inline void installIntoCanvasForDirtyNotification();
72 typedef SkSurface INHERITED;
73 };
75 SkCanvas* SkSurface_Base::getCachedCanvas() {
76 if (NULL == fCachedCanvas) {
77 fCachedCanvas = this->onNewCanvas();
78 this->installIntoCanvasForDirtyNotification();
79 }
80 return fCachedCanvas;
81 }
83 SkImage* SkSurface_Base::getCachedImage() {
84 if (NULL == fCachedImage) {
85 fCachedImage = this->onNewImageSnapshot();
86 this->installIntoCanvasForDirtyNotification();
87 }
88 return fCachedImage;
89 }
91 void SkSurface_Base::installIntoCanvasForDirtyNotification() {
92 if (NULL != fCachedCanvas) {
93 fCachedCanvas->setSurfaceBase(this);
94 }
95 }
97 #endif
