| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkBitmapDevice_DEFINED |
| #define SkBitmapDevice_DEFINED |
| |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkColor.h" |
| #include "SkDevice.h" |
| #include "SkImageInfo.h" |
| #include "SkPixelRef.h" |
| #include "SkRect.h" |
| #include "SkScalar.h" |
| #include "SkSize.h" |
| #include "SkSurfaceProps.h" |
| |
| class SkDraw; |
| class SkImageFilterCache; |
| class SkMatrix; |
| class SkPaint; |
| class SkPath; |
| class SkPixelRef; |
| class SkPixmap; |
| class SkRasterHandleAllocator; |
| class SkRRect; |
| class SkSurface; |
| struct SkPoint; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| class SK_API SkBitmapDevice : public SkBaseDevice { |
| public: |
| /** |
| * 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. |
| */ |
| SkBitmapDevice(const SkBitmap& bitmap); |
| |
| /** |
| * Create a new device along with its requisite pixel memory using |
| * default SkSurfaceProps (i.e., kLegacyFontHost_InitType-style). |
| * Note: this entry point is slated for removal - no one should call it. |
| */ |
| static SkBitmapDevice* Create(const SkImageInfo& info); |
| |
| /** |
| * 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. |
| */ |
| SkBitmapDevice(const SkBitmap& bitmap, const SkSurfaceProps& surfaceProps, |
| void* externalHandle = nullptr); |
| |
| static SkBitmapDevice* Create(const SkImageInfo&, const SkSurfaceProps&, |
| SkRasterHandleAllocator* = nullptr); |
| |
| protected: |
| bool onShouldDisableLCD(const SkPaint&) const override; |
| void* getRasterHandle() const override { return fRasterHandle; } |
| |
| /** 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. |
| */ |
| void drawPaint(const SkDraw&, const SkPaint& paint) override; |
| void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count, |
| const SkPoint[], const SkPaint& paint) override; |
| void drawRect(const SkDraw&, const SkRect& r, const SkPaint& paint) override; |
| void drawOval(const SkDraw&, const SkRect& oval, const SkPaint& paint) override; |
| void drawRRect(const SkDraw&, const SkRRect& rr, const SkPaint& paint) 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. |
| */ |
| void drawPath(const SkDraw&, const SkPath&, const SkPaint&, const SkMatrix* prePathMatrix, |
| bool pathIsMutable) override; |
| void drawBitmap(const SkDraw&, const SkBitmap&, const SkMatrix&, const SkPaint&) override; |
| void drawSprite(const SkDraw&, const SkBitmap&, int x, int y, const SkPaint&) override; |
| |
| /** |
| * The default impl. will create a bitmap-shader from the bitmap, |
| * and call drawRect with it. |
| */ |
| void drawBitmapRect(const SkDraw&, const SkBitmap&, const SkRect*, const SkRect&, |
| const SkPaint&, SkCanvas::SrcRectConstraint) override; |
| |
| /** |
| * Does not handle text decoration. |
| * Decorations (underline and stike-thru) will be handled by SkCanvas. |
| */ |
| void drawText(const SkDraw&, const void* text, size_t len, SkScalar x, SkScalar y, |
| const SkPaint&) override; |
| void drawPosText(const SkDraw&, const void* text, size_t len, const SkScalar pos[], |
| int scalarsPerPos, const SkPoint& offset, const SkPaint& paint) override; |
| void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount, const SkPoint verts[], |
| const SkPoint texs[], const SkColor colors[], SkBlendMode, |
| const uint16_t indices[], int indexCount, const SkPaint&) override; |
| void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y, const SkPaint&) override; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| |
| void drawSpecial(const SkDraw&, SkSpecialImage*, int x, int y, const SkPaint&) override; |
| sk_sp<SkSpecialImage> makeSpecial(const SkBitmap&) override; |
| sk_sp<SkSpecialImage> makeSpecial(const SkImage*) override; |
| sk_sp<SkSpecialImage> snapSpecial() override; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| |
| bool onReadPixels(const SkImageInfo&, void*, size_t, int x, int y) override; |
| bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) override; |
| bool onPeekPixels(SkPixmap*) override; |
| bool onAccessPixels(SkPixmap*) override; |
| |
| private: |
| friend class SkCanvas; |
| friend struct DeviceCM; //for setMatrixClip |
| friend class SkDraw; |
| friend class SkDrawIter; |
| friend class SkDeviceFilteredPaint; |
| |
| 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&) override; |
| |
| SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override; |
| |
| sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&) override; |
| |
| SkImageFilterCache* getImageFilterCache() override; |
| |
| SkBitmap fBitmap; |
| void* fRasterHandle = nullptr; |
| |
| void setNewSize(const SkISize&); // Used by SkCanvas for resetForNextPicture(). |
| |
| typedef SkBaseDevice INHERITED; |
| }; |
| |
| #endif // SkBitmapDevice_DEFINED |