Index: include/core/SkDevice.h |
=================================================================== |
--- include/core/SkDevice.h (revision 10711) |
+++ include/core/SkDevice.h (working copy) |
@@ -30,51 +30,15 @@ |
SK_DECLARE_INST_COUNT(SkDevice) |
/** |
- * Construct a new device with the specified bitmap as its backend. It is |
- * valid for the bitmap to have no pixels associated with it. In that case, |
- * any drawing to this device will have no effect. |
+ * Construct a new device. |
*/ |
- SkDevice(const SkBitmap& bitmap); |
+ SkDevice(); |
/** |
- * Construct a new device with the specified bitmap as its backend. It is |
- * valid for the bitmap to have no pixels associated with it. In that case, |
- * any drawing to this device will have no effect. |
+ * Construct a new device. |
*/ |
- SkDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties); |
+ SkDevice(const SkDeviceProperties& deviceProperties); |
- /** |
- * Create a new raster device and have the pixels be automatically |
- * allocated. The rowBytes of the device will be computed automatically |
- * based on the config and the width. |
- * |
- * @param config The desired config for the pixels. If the request cannot |
- * be met, the closest matching support config will be used. |
- * @param width width (in pixels) of the device |
- * @param height height (in pixels) of the device |
- * @param isOpaque Set to true if it is known that all of the pixels will |
- * be drawn to opaquely. Used as an accelerator when drawing |
- * these pixels to another device. |
- */ |
- SkDevice(SkBitmap::Config config, int width, int height, bool isOpaque = false); |
- |
- /** |
- * Create a new raster device and have the pixels be automatically |
- * allocated. The rowBytes of the device will be computed automatically |
- * based on the config and the width. |
- * |
- * @param config The desired config for the pixels. If the request cannot |
- * be met, the closest matching support config will be used. |
- * @param width width (in pixels) of the device |
- * @param height height (in pixels) of the device |
- * @param isOpaque Set to true if it is known that all of the pixels will |
- * be drawn to opaquely. Used as an accelerator when drawing |
- * these pixels to another device. |
- * @param deviceProperties Properties which affect compositing. |
- */ |
- SkDevice(SkBitmap::Config config, int width, int height, bool isOpaque, |
- const SkDeviceProperties& deviceProperties); |
- |
virtual ~SkDevice(); |
/** |
@@ -99,14 +63,14 @@ |
kVector_Capability = 0x2, //!< mask indicating a vector representation |
kAll_Capabilities = 0x3 |
}; |
- virtual uint32_t getDeviceCapabilities() { return 0; } |
+ virtual uint32_t getDeviceCapabilities() = 0; |
/** Return the width of the device (in pixels). |
*/ |
- virtual int width() const { return fBitmap.width(); } |
+ virtual int width() const = 0; |
/** Return the height of the device (in pixels). |
*/ |
- virtual int height() const { return fBitmap.height(); } |
+ virtual int height() const = 0; |
/** Return the image properties of the device. */ |
virtual const SkDeviceProperties& getDeviceProperties() const { |
@@ -119,16 +83,16 @@ |
* canvas. The root device will have its top-left at 0,0, but other devices |
* such as those associated with saveLayer may have a non-zero origin. |
*/ |
- void getGlobalBounds(SkIRect* bounds) const; |
+ virtual void getGlobalBounds(SkIRect* bounds) const = 0; |
/** Returns true if the device's bitmap's config treats every pixels as |
implicitly opaque. |
*/ |
- bool isOpaque() const { return fBitmap.isOpaque(); } |
+ virtual bool isOpaque() const = 0; |
/** Return the bitmap config of the device's pixels |
*/ |
- SkBitmap::Config config() const { return fBitmap.getConfig(); } |
+ virtual SkBitmap::Config config() const = 0; |
reed1
2013/08/15 14:46:29
Can we remove this guy from the base?
robertphillips
2013/08/15 17:34:07
Done.
|
/** Return the bitmap associated with this device. Call this each time you need |
to access the bitmap, as it notifies the subclass to perform any flushing |
@@ -154,12 +118,12 @@ |
* not kARGB_8888_Config then this parameter is ignored. |
*/ |
virtual void writePixels(const SkBitmap& bitmap, int x, int y, |
- SkCanvas::Config8888 config8888 = SkCanvas::kNative_Premul_Config8888); |
+ SkCanvas::Config8888 config8888 = SkCanvas::kNative_Premul_Config8888) = 0; |
/** |
* Return the device's associated gpu render target, or NULL. |
*/ |
- virtual GrRenderTarget* accessRenderTarget() { return NULL; } |
+ virtual GrRenderTarget* accessRenderTarget() = 0; |
/** |
@@ -215,7 +179,7 @@ |
* |
* The baseclass SkDevice filters based on its depth and blitters. |
*/ |
- virtual bool filterTextFlags(const SkPaint& paint, TextFlags*); |
+ virtual bool filterTextFlags(const SkPaint& paint, TextFlags*) = 0; |
/** |
* |
@@ -234,12 +198,12 @@ |
* passed in). |
*/ |
virtual void setMatrixClip(const SkMatrix&, const SkRegion&, |
- const SkClipStack&); |
+ const SkClipStack&) {}; |
/** Clears the entire device to the specified color (including alpha). |
* Ignores the clip. |
*/ |
- virtual void clear(SkColor color); |
+ virtual void clear(SkColor color) = 0; |
/** |
* Deprecated name for clear. |
@@ -251,15 +215,15 @@ |
and are handling any looping from the paint, and any effects from the |
DrawFilter. |
*/ |
- virtual void drawPaint(const SkDraw&, const SkPaint& paint); |
+ virtual void drawPaint(const SkDraw&, const SkPaint& paint) = 0; |
virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count, |
- const SkPoint[], const SkPaint& paint); |
+ const SkPoint[], const SkPaint& paint) = 0; |
virtual void drawRect(const SkDraw&, const SkRect& r, |
- const SkPaint& paint); |
+ const SkPaint& paint) = 0; |
virtual void drawOval(const SkDraw&, const SkRect& oval, |
- const SkPaint& paint); |
+ const SkPaint& paint) = 0; |
virtual void drawRRect(const SkDraw&, const SkRRect& rr, |
- const SkPaint& paint); |
+ const SkPaint& paint) = 0; |
/** |
* If pathIsMutable, then the implementation is allowed to cast path to a |
@@ -275,11 +239,11 @@ |
virtual void drawPath(const SkDraw&, const SkPath& path, |
const SkPaint& paint, |
const SkMatrix* prePathMatrix = NULL, |
- bool pathIsMutable = false); |
+ bool pathIsMutable = false) = 0; |
virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap, |
- const SkMatrix& matrix, const SkPaint& paint); |
+ const SkMatrix& matrix, const SkPaint& paint) = 0; |
virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap, |
- int x, int y, const SkPaint& paint); |
+ int x, int y, const SkPaint& paint) = 0; |
/** |
* The default impl. will create a bitmap-shader from the bitmap, |
@@ -287,35 +251,35 @@ |
*/ |
virtual void drawBitmapRect(const SkDraw&, const SkBitmap&, |
const SkRect* srcOrNull, const SkRect& dst, |
- const SkPaint& paint); |
+ const SkPaint& paint) = 0; |
/** |
* Does not handle text decoration. |
* Decorations (underline and stike-thru) will be handled by SkCanvas. |
*/ |
virtual void drawText(const SkDraw&, const void* text, size_t len, |
- SkScalar x, SkScalar y, const SkPaint& paint); |
+ SkScalar x, SkScalar y, const SkPaint& paint) = 0; |
virtual void drawPosText(const SkDraw&, const void* text, size_t len, |
const SkScalar pos[], SkScalar constY, |
- int scalarsPerPos, const SkPaint& paint); |
+ int scalarsPerPos, const SkPaint& paint) = 0; |
virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len, |
const SkPath& path, const SkMatrix* matrix, |
- const SkPaint& paint); |
+ const SkPaint& paint) = 0; |
#ifdef SK_BUILD_FOR_ANDROID |
virtual void drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len, |
const SkPoint pos[], const SkPaint& paint, |
- const SkPath& path, const SkMatrix* matrix); |
+ const SkPath& path, const SkMatrix* matrix) = 0; |
#endif |
virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount, |
const SkPoint verts[], const SkPoint texs[], |
const SkColor colors[], SkXfermode* xmode, |
const uint16_t indices[], int indexCount, |
- const SkPaint& paint); |
+ const SkPaint& paint) = 0; |
/** The SkDevice passed will be an SkDevice which was returned by a call to |
onCreateCompatibleDevice on this device with kSaveLayer_Usage. |
*/ |
virtual void drawDevice(const SkDraw&, SkDevice*, int x, int y, |
- const SkPaint&); |
+ const SkPaint&) = 0; |
/** |
* On success (returns true), copy the device pixels into the bitmap. |
@@ -351,21 +315,11 @@ |
/////////////////////////////////////////////////////////////////////////// |
/** Update as needed the pixel value in the bitmap, so that the caller can |
- access the pixels directly. Note: only the pixels field should be |
- altered. The config/width/height/rowbytes must remain unchanged. |
- @param bitmap The device's bitmap |
- @return Echo the bitmap parameter, or an alternate (shadow) bitmap |
- maintained by the subclass. |
+ access the pixels directly. |
+ @return The device contents as a bitmap |
*/ |
- virtual const SkBitmap& onAccessBitmap(SkBitmap*); |
+ virtual const SkBitmap& onAccessBitmap() = 0; |
- SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); } |
- // just for subclasses, to assign a custom pixelref |
- SkPixelRef* setPixelRef(SkPixelRef* pr, size_t offset) { |
- fBitmap.setPixelRef(pr, offset); |
- return pr; |
- } |
- |
/** |
* Implements readPixels API. The caller will ensure that: |
* 1. bitmap has pixel config kARGB_8888_Config. |
@@ -375,13 +329,13 @@ |
*/ |
virtual bool onReadPixels(const SkBitmap& bitmap, |
int x, int y, |
- SkCanvas::Config8888 config8888); |
+ SkCanvas::Config8888 config8888) = 0; |
/** Called when this device is installed into a Canvas. Balanaced by a call |
to unlockPixels() when the device is removed from a Canvas. |
*/ |
- virtual void lockPixels(); |
- virtual void unlockPixels(); |
+ virtual void lockPixels() = 0; |
+ virtual void unlockPixels() = 0; |
/** |
* Returns true if the device allows processing of this imagefilter. If |
@@ -389,7 +343,7 @@ |
* some subclasses that do not support pixel manipulations after drawing |
* has occurred (e.g. printing). The default implementation returns true. |
*/ |
- virtual bool allowImageFilter(SkImageFilter*); |
+ virtual bool allowImageFilter(SkImageFilter*) = 0; |
/** |
* Override and return true for filters that the device can handle |
@@ -398,7 +352,7 @@ |
* Returning false means the SkCanvas will have apply the filter itself, |
* and just pass the resulting image to the device. |
*/ |
- virtual bool canHandleImageFilter(SkImageFilter*); |
+ virtual bool canHandleImageFilter(SkImageFilter*) = 0; |
/** |
* Related (but not required) to canHandleImageFilter, this method returns |
@@ -408,7 +362,7 @@ |
* it just returns false and leaves result and offset unchanged. |
*/ |
virtual bool filterImage(SkImageFilter*, const SkBitmap&, const SkMatrix&, |
- SkBitmap* result, SkIPoint* offset); |
+ SkBitmap* result, SkIPoint* offset) = 0; |
// This is equal kBGRA_Premul_Config8888 or kRGBA_Premul_Config8888 if |
// either is identical to kNative_Premul_Config8888. Otherwise, -1. |
@@ -423,10 +377,11 @@ |
friend class SkDeviceImageFilterProxy; |
friend class SkSurface_Raster; |
+ |
// used to change the backend's pixels (and possibly config/rowbytes) |
// but cannot change the width/height, so there should be no change to |
// any clip information. |
- void replaceBitmapBackendForRasterSurface(const SkBitmap&); |
+ virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) = 0; |
// just called by SkCanvas when built as a layer |
void setOrigin(int x, int y) { fOrigin.set(x, y); } |
@@ -441,13 +396,12 @@ |
virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config config, |
int width, int height, |
bool isOpaque, |
- Usage usage); |
+ Usage usage) = 0; |
/** Causes any deferred drawing to the device to be completed. |
*/ |
- virtual void flush() {} |
+ virtual void flush() = 0; |
- SkBitmap fBitmap; |
SkIPoint fOrigin; |
SkMetaData* fMetaData; |
/** |
@@ -465,4 +419,284 @@ |
typedef SkRefCnt INHERITED; |
}; |
+/////////////////////////////////////////////////////////////////////////////// |
+class SK_API SkRasterDevice : public SkDevice { |
+public: |
+ SK_DECLARE_INST_COUNT(SkRasterDevice) |
+ |
+ /** |
+ * Construct a new device with the specified bitmap as its backend. It is |
+ * valid for the bitmap to have no pixels associated with it. In that case, |
+ * any drawing to this device will have no effect. |
+ */ |
+ SkRasterDevice(const SkBitmap& bitmap); |
+ |
+ /** |
+ * Construct a new device with the specified bitmap as its backend. It is |
+ * valid for the bitmap to have no pixels associated with it. In that case, |
+ * any drawing to this device will have no effect. |
+ */ |
+ SkRasterDevice(const SkBitmap& bitmap, const SkDeviceProperties& deviceProperties); |
+ |
+ /** |
+ * Create a new raster device and have the pixels be automatically |
+ * allocated. The rowBytes of the device will be computed automatically |
+ * based on the config and the width. |
+ * |
+ * @param config The desired config for the pixels. If the request cannot |
+ * be met, the closest matching support config will be used. |
+ * @param width width (in pixels) of the device |
+ * @param height height (in pixels) of the device |
+ * @param isOpaque Set to true if it is known that all of the pixels will |
+ * be drawn to opaquely. Used as an accelerator when drawing |
+ * these pixels to another device. |
+ */ |
+ SkRasterDevice(SkBitmap::Config config, int width, int height, bool isOpaque); |
+ |
+ /** |
+ * Create a new raster device and have the pixels be automatically |
+ * allocated. The rowBytes of the device will be computed automatically |
+ * based on the config and the width. |
+ * |
+ * @param config The desired config for the pixels. If the request cannot |
+ * be met, the closest matching support config will be used. |
+ * @param width width (in pixels) of the device |
+ * @param height height (in pixels) of the device |
+ * @param isOpaque Set to true if it is known that all of the pixels will |
+ * be drawn to opaquely. Used as an accelerator when drawing |
+ * these pixels to another device. |
+ * @param deviceProperties Properties which affect compositing. |
+ */ |
+ SkRasterDevice(SkBitmap::Config config, int width, int height, bool isOpaque, |
+ const SkDeviceProperties& deviceProperties); |
+ |
+ virtual ~SkRasterDevice(); |
+ |
+ virtual uint32_t getDeviceCapabilities() SK_OVERRIDE { return 0; } |
+ |
+ /** Return the width of the device (in pixels). |
+ */ |
+ virtual int width() const SK_OVERRIDE { return fBitmap.width(); } |
+ /** Return the height of the device (in pixels). |
+ */ |
+ virtual int height() const SK_OVERRIDE { return fBitmap.height(); } |
+ |
+ /** |
+ * Return the bounds of the device in the coordinate space of the root |
+ * canvas. The root device will have its top-left at 0,0, but other devices |
+ * such as those associated with saveLayer may have a non-zero origin. |
+ */ |
+ virtual void getGlobalBounds(SkIRect* bounds) const SK_OVERRIDE; |
+ |
+ /** Returns true if the device's bitmap's config treats every pixels as |
+ implicitly opaque. |
+ */ |
+ virtual bool isOpaque() const SK_OVERRIDE { return fBitmap.isOpaque(); } |
+ |
+ /** Return the bitmap config of the device's pixels |
+ */ |
+ virtual SkBitmap::Config config() const SK_OVERRIDE { return fBitmap.getConfig(); } |
+ |
+ /** |
+ * DEPRECATED: This will be made protected once WebKit stops using it. |
+ * Instead use Canvas' writePixels method. |
+ * |
+ * Similar to draw sprite, this method will copy the pixels in bitmap onto |
+ * the device, with the top/left corner specified by (x, y). The pixel |
+ * values in the device are completely replaced: there is no blending. |
+ * |
+ * Currently if bitmap is backed by a texture this is a no-op. This may be |
+ * relaxed in the future. |
+ * |
+ * If the bitmap has config kARGB_8888_Config then the config8888 param |
+ * will determines how the pixel valuess are intepreted. If the bitmap is |
+ * not kARGB_8888_Config then this parameter is ignored. |
+ */ |
+ virtual void writePixels(const SkBitmap& bitmap, int x, int y, |
+ SkCanvas::Config8888 config8888) SK_OVERRIDE; |
+ |
+ /** |
+ * Return the device's associated gpu render target, or NULL. |
+ */ |
+ virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE { return NULL; } |
+ |
+protected: |
+ /** |
+ * Device may filter the text flags for drawing text here. If it wants to |
+ * make a change to the specified values, it should write them into the |
+ * textflags parameter (output) and return true. If the paint is fine as |
+ * is, then ignore the textflags parameter and return false. |
+ * |
+ * The baseclass SkDevice filters based on its depth and blitters. |
+ */ |
+ virtual bool filterTextFlags(const SkPaint& paint, TextFlags*) SK_OVERRIDE; |
+ |
+ /** Clears the entire device to the specified color (including alpha). |
+ * Ignores the clip. |
+ */ |
+ virtual void clear(SkColor color) SK_OVERRIDE; |
+ |
+ /** These are called inside the per-device-layer loop for each draw call. |
+ When these are called, we have already applied any saveLayer operations, |
+ and are handling any looping from the paint, and any effects from the |
+ DrawFilter. |
+ */ |
+ virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count, |
+ const SkPoint[], const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawRect(const SkDraw&, const SkRect& r, |
+ const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawOval(const SkDraw&, const SkRect& oval, |
+ const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawRRect(const SkDraw&, const SkRRect& rr, |
+ const SkPaint& paint) SK_OVERRIDE; |
+ |
+ /** |
+ * If pathIsMutable, then the implementation is allowed to cast path to a |
+ * non-const pointer and modify it in place (as an optimization). Canvas |
+ * may do this to implement helpers such as drawOval, by placing a temp |
+ * path on the stack to hold the representation of the oval. |
+ * |
+ * If prePathMatrix is not null, it should logically be applied before any |
+ * stroking or other effects. If there are no effects on the paint that |
+ * affect the geometry/rasterization, then the pre matrix can just be |
+ * pre-concated with the current matrix. |
+ */ |
+ virtual void drawPath(const SkDraw&, const SkPath& path, |
+ const SkPaint& paint, |
+ const SkMatrix* prePathMatrix = NULL, |
+ bool pathIsMutable = false) SK_OVERRIDE; |
+ virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap, |
+ const SkMatrix& matrix, const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap, |
+ int x, int y, const SkPaint& paint) SK_OVERRIDE; |
+ |
+ /** |
+ * The default impl. will create a bitmap-shader from the bitmap, |
+ * and call drawRect with it. |
+ */ |
+ virtual void drawBitmapRect(const SkDraw&, const SkBitmap&, |
+ const SkRect* srcOrNull, const SkRect& dst, |
+ const SkPaint& paint) SK_OVERRIDE; |
+ |
+ /** |
+ * Does not handle text decoration. |
+ * Decorations (underline and stike-thru) will be handled by SkCanvas. |
+ */ |
+ virtual void drawText(const SkDraw&, const void* text, size_t len, |
+ SkScalar x, SkScalar y, const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawPosText(const SkDraw&, const void* text, size_t len, |
+ const SkScalar pos[], SkScalar constY, |
+ int scalarsPerPos, const SkPaint& paint) SK_OVERRIDE; |
+ virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len, |
+ const SkPath& path, const SkMatrix* matrix, |
+ const SkPaint& paint) SK_OVERRIDE; |
+#ifdef SK_BUILD_FOR_ANDROID |
+ virtual void drawPosTextOnPath(const SkDraw& draw, const void* text, size_t len, |
+ const SkPoint pos[], const SkPaint& paint, |
+ const SkPath& path, const SkMatrix* matrix) SK_OVERRIDE; |
#endif |
+ virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount, |
+ const SkPoint verts[], const SkPoint texs[], |
+ const SkColor colors[], SkXfermode* xmode, |
+ const uint16_t indices[], int indexCount, |
+ const SkPaint& paint) SK_OVERRIDE; |
+ /** The SkDevice passed will be an SkDevice which was returned by a call to |
+ onCreateCompatibleDevice on this device with kSaveLayer_Usage. |
+ */ |
+ virtual void drawDevice(const SkDraw&, SkDevice*, int x, int y, |
+ const SkPaint&) SK_OVERRIDE; |
+ |
+ /////////////////////////////////////////////////////////////////////////// |
+ |
+ /** Update as needed the pixel value in the bitmap, so that the caller can |
+ access the pixels directly. Note: only the pixels field should be |
+ altered. The config/width/height/rowbytes must remain unchanged. |
+ @return the device contents as a bitmap |
+ */ |
+ virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE; |
+ |
+ SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); } |
+ // just for subclasses, to assign a custom pixelref |
+ SkPixelRef* setPixelRef(SkPixelRef* pr, size_t offset) { |
+ fBitmap.setPixelRef(pr, offset); |
+ return pr; |
+ } |
+ |
+ /** |
+ * Implements readPixels API. The caller will ensure that: |
+ * 1. bitmap has pixel config kARGB_8888_Config. |
+ * 2. bitmap has pixels. |
+ * 3. The rectangle (x, y, x + bitmap->width(), y + bitmap->height()) is |
+ * contained in the device bounds. |
+ */ |
+ virtual bool onReadPixels(const SkBitmap& bitmap, |
+ int x, int y, |
+ SkCanvas::Config8888 config8888) SK_OVERRIDE; |
+ |
+ /** Called when this device is installed into a Canvas. Balanced by a call |
+ to unlockPixels() when the device is removed from a Canvas. |
+ */ |
+ virtual void lockPixels() SK_OVERRIDE; |
+ virtual void unlockPixels() SK_OVERRIDE; |
+ |
+ /** |
+ * Returns true if the device allows processing of this imagefilter. If |
+ * false is returned, then the filter is ignored. This may happen for |
+ * some subclasses that do not support pixel manipulations after drawing |
+ * has occurred (e.g. printing). The default implementation returns true. |
+ */ |
+ virtual bool allowImageFilter(SkImageFilter*) SK_OVERRIDE; |
+ |
+ /** |
+ * Override and return true for filters that the device can handle |
+ * intrinsically. Doing so means that SkCanvas will pass-through this |
+ * filter to drawSprite and drawDevice (and potentially filterImage). |
+ * Returning false means the SkCanvas will have apply the filter itself, |
+ * and just pass the resulting image to the device. |
+ */ |
+ virtual bool canHandleImageFilter(SkImageFilter*) SK_OVERRIDE; |
+ |
+ /** |
+ * Related (but not required) to canHandleImageFilter, this method returns |
+ * true if the device could apply the filter to the src bitmap and return |
+ * the result (and updates offset as needed). |
+ * If the device does not recognize or support this filter, |
+ * it just returns false and leaves result and offset unchanged. |
+ */ |
+ virtual bool filterImage(SkImageFilter*, const SkBitmap&, const SkMatrix&, |
+ SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; |
+ |
+private: |
+ friend class SkCanvas; |
+ friend struct DeviceCM; //for setMatrixClip |
+ friend class SkDraw; |
+ friend class SkDrawIter; |
+ friend class SkDeviceFilteredPaint; |
+ friend class SkDeviceImageFilterProxy; |
+ |
+ friend class SkSurface_Raster; |
+ |
+ // used to change the backend's pixels (and possibly config/rowbytes) |
+ // but cannot change the width/height, so there should be no change to |
+ // any clip information. |
+ virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) SK_OVERRIDE; |
+ |
+ /** |
+ * Subclasses should override this to implement createCompatibleDevice. |
+ */ |
+ virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config config, |
+ int width, int height, |
+ bool isOpaque, |
+ Usage usage) SK_OVERRIDE; |
+ |
+ /** Causes any deferred drawing to the device to be completed. |
+ */ |
+ virtual void flush() SK_OVERRIDE {} |
+ |
+ SkBitmap fBitmap; |
+ |
+ typedef SkDevice INHERITED; |
+}; |
+ |
+#endif |