SkBitmapDevice.h

/*
 * 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 "SkRect.h"
#include "SkScalar.h"
#include "SkSize.h"
#include "SkSurfaceProps.h"
#include "SkTypes.h"

class SkDraw;
class SkImageFilterCache;
class SkMatrix;
class SkPaint;
class SkPath;
class SkPixelRef;
class SkPixmap;
class SkRRect;
class SkSurface;
class SkXfermode;
struct SkPoint;

class SK_API SkBitmapDevice : public SkBaseDevice {
public:
    SkBitmapDevice(const SkBitmap& bitmap);

    static SkBitmapDevice* Create(const SkImageInfo& info);

    SkBitmapDevice(const SkBitmap& bitmap, const SkSurfaceProps& surfaceProps);

    static SkBitmapDevice* Create(const SkImageInfo&, const SkSurfaceProps&);

protected:
    bool onShouldDisableLCD(const SkPaint&) const override;

    void drawPaint(const SkDraw&, const SkPaint& paint) override;
    virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
                            const SkPoint[], const SkPaint& paint) override;
    virtual void drawRect(const SkDraw&, const SkRect& r,
                          const SkPaint& paint) override;
    virtual void drawOval(const SkDraw&, const SkRect& oval,
                          const SkPaint& paint) override;
    virtual void drawRRect(const SkDraw&, const SkRRect& rr,
                           const SkPaint& paint) override;

    virtual void drawPath(const SkDraw&, const SkPath& path,
                          const SkPaint& paint,
                          const SkMatrix* prePathMatrix = NULL,
                          bool pathIsMutable = false) override;
    virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
                            const SkMatrix& matrix, const SkPaint& paint) override;
    virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
                            int x, int y, const SkPaint& paint) override;

    void drawBitmapRect(const SkDraw&, const SkBitmap&, const SkRect*, const SkRect&,
                        const SkPaint&, SkCanvas::SrcRectConstraint) override;

    virtual void drawText(const SkDraw&, const void* text, size_t len,
                          SkScalar x, SkScalar y, const SkPaint& paint) override;
    virtual void drawPosText(const SkDraw&, const void* text, size_t len,
                             const SkScalar pos[], int scalarsPerPos,
                             const SkPoint& offset, const SkPaint& paint) override;
    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) override;
    virtual 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;


#ifdef SK_SUPPORT_LEGACY_ACCESSBITMAP
    const SkBitmap& onAccessBitmap() override;
#else
    const SkBitmap& onAccessBitmap();
#endif

    SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); }
    // just for subclasses, to assign a custom pixelref
    SkPixelRef* setPixelRef(SkPixelRef* pr) {
        fBitmap.setPixelRef(pr);
        return pr;
    }

    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 setNewSize(const SkISize&);  // Used by SkCanvas for resetForNextPicture().

    typedef SkBaseDevice INHERITED;
};

#endif // SkBitmapDevice_DEFINED