src/gpu/SkGpuDevice.h - platform/external/skia - Gitiles

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #ifndef SkGpuDevice_DEFINED
 #define SkGpuDevice_DEFINED

 #include "GrClipStackClip.h"
 #include "GrContext.h"
 #include "GrContextPriv.h"
 #include "GrRenderTargetContext.h"
 #include "GrTypes.h"
 #include "SkBitmap.h"
 #include "SkClipStackDevice.h"
 #include "SkGr.h"
 #include "SkPicture.h"
 #include "SkRegion.h"
 #include "SkSurface.h"

 class GrAccelData;
 class GrTextureMaker;
 class GrTextureProducer;
 struct GrCachedLayer;

 class SkSpecialImage;

 /**
  *  Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the
  *  canvas.
  */
 class SkGpuDevice : public SkClipStackDevice {
 public:
     enum InitContents {
         kClear_InitContents,
         kUninit_InitContents
     };

     /**
      * Creates an SkGpuDevice from a GrRenderTargetContext whose backing width/height is
      * different than its actual width/height (e.g., approx-match scratch texture).
      */
     static sk_sp<SkGpuDevice> Make(GrContext*, sk_sp<GrRenderTargetContext> renderTargetContext,
                                    int width, int height, InitContents);

     /**
      * New device that will create an offscreen renderTarget based on the ImageInfo and
      * sampleCount. The mipMapped flag tells the gpu to create the underlying render target with
      * mips. The Budgeted param controls whether the device's backing store counts against the
      * resource cache budget. On failure, returns nullptr.
      * This entry point creates a kExact backing store. It is used when creating SkGpuDevices
      * for SkSurfaces.
      */
     static sk_sp<SkGpuDevice> Make(GrContext*, SkBudgeted, const SkImageInfo&,
                                    int sampleCount, GrSurfaceOrigin, const SkSurfaceProps*,
                                    GrMipMapped mipMapped, InitContents);

     ~SkGpuDevice() override {}

     GrContext* context() const override { return fContext.get(); }

     // set all pixels to 0
     void clearAll();

     void replaceRenderTargetContext(bool shouldRetainContent);

     GrRenderTargetContext* accessRenderTargetContext() override;

     void drawPaint(const SkPaint& paint) override;
     void drawPoints(SkCanvas::PointMode mode, size_t count, const SkPoint[],
                     const SkPaint& paint) override;
     void drawRect(const SkRect& r, const SkPaint& paint) override;
     void drawRRect(const SkRRect& r, const SkPaint& paint) override;
     void drawDRRect(const SkRRect& outer, const SkRRect& inner,
                     const SkPaint& paint) override;
     void drawRegion(const SkRegion& r, const SkPaint& paint) override;
     void drawOval(const SkRect& oval, const SkPaint& paint) override;
     void drawArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle,
                  bool useCenter, const SkPaint& paint) override;
     void drawPath(const SkPath& path, const SkPaint& paint,
                   const SkMatrix* prePathMatrix, bool pathIsMutable) override;
     void drawBitmap(const SkBitmap&, SkScalar x, SkScalar y,
                     const SkPaint&) override;
     void drawBitmapRect(const SkBitmap&, const SkRect* srcOrNull, const SkRect& dst,
                         const SkPaint& paint, SkCanvas::SrcRectConstraint) override;
     void drawSprite(const SkBitmap& bitmap, int x, int y,
                     const SkPaint& paint) override;
     void drawText(const void* text, size_t len, SkScalar x, SkScalar y,
                   const SkPaint&) override;
     void drawPosText(const void* text, size_t len, const SkScalar pos[],
                      int scalarsPerPos, const SkPoint& offset, const SkPaint&) override;
     void drawTextBlob(const SkTextBlob*, SkScalar x, SkScalar y,
                       const SkPaint& paint, SkDrawFilter* drawFilter) override;
     void drawVertices(const SkVertices*, SkBlendMode, const SkPaint&) override;
     void drawShadow(const SkPath&, const SkDrawShadowRec&) override;
     void drawAtlas(const SkImage* atlas, const SkRSXform[], const SkRect[],
                    const SkColor[], int count, SkBlendMode, const SkPaint&) override;
     void drawDevice(SkBaseDevice*, int x, int y, const SkPaint&) override;

     void drawImage(const SkImage*, SkScalar x, SkScalar y, const SkPaint&) override;
     void drawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
                        const SkPaint&, SkCanvas::SrcRectConstraint) override;

     void drawImageNine(const SkImage* image, const SkIRect& center,
                        const SkRect& dst, const SkPaint& paint) override;
     void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
                         const SkRect& dst, const SkPaint& paint) override;

     void drawImageLattice(const SkImage*, const SkCanvas::Lattice&,
                           const SkRect& dst, const SkPaint&) override;
     void drawBitmapLattice(const SkBitmap&, const SkCanvas::Lattice&,
                            const SkRect& dst, const SkPaint&) override;

     void drawSpecial(SkSpecialImage*, int left, int top, const SkPaint& paint,
                      SkImage*, const SkMatrix&) override;
     sk_sp<SkSpecialImage> makeSpecial(const SkBitmap&) override;
     sk_sp<SkSpecialImage> makeSpecial(const SkImage*) override;
     sk_sp<SkSpecialImage> snapSpecial() override;

     void flush() override;
     GrSemaphoresSubmitted flushAndSignalSemaphores(int numSemaphores,
                                                    GrBackendSemaphore signalSemaphores[]);
     bool wait(int numSemaphores, const GrBackendSemaphore* waitSemaphores);

     bool onAccessPixels(SkPixmap*) override;

 protected:
     bool onReadPixels(const SkPixmap&, int, int) override;
     bool onWritePixels(const SkPixmap&, int, int) override;

 private:
     // We want these unreffed in RenderTargetContext, GrContext order.
     sk_sp<GrContext>             fContext;
     sk_sp<GrRenderTargetContext> fRenderTargetContext;

     SkISize                      fSize;
     bool                         fOpaque;

     enum Flags {
         kNeedClear_Flag = 1 << 0,  //!< Surface requires an initial clear
         kIsOpaque_Flag  = 1 << 1,  //!< Hint from client that rendering to this device will be
                                    //   opaque even if the config supports alpha.
     };
     static bool CheckAlphaTypeAndGetFlags(const SkImageInfo* info, InitContents init,
                                           unsigned* flags);

     SkGpuDevice(GrContext*, sk_sp<GrRenderTargetContext>, int width, int height, unsigned flags);

     SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;

     sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&) override;

     SkImageFilterCache* getImageFilterCache() override;

     bool forceConservativeRasterClip() const override { return true; }

     GrClipStackClip clip() const { return GrClipStackClip(&this->cs()); }

     const GrCaps* caps() const { return fContext->contextPriv().caps(); }

     /**
      * Helper functions called by drawBitmapCommon. By the time these are called the SkDraw's
      * matrix, clip, and the device's render target has already been set on GrContext.
      */

     // The tileSize and clippedSrcRect will be valid only if true is returned.
     bool shouldTileImageID(uint32_t imageID,
                            const SkIRect& imageRect,
                            const SkMatrix& viewMatrix,
                            const SkMatrix& srcToDstRectMatrix,
                            const GrSamplerState& params,
                            const SkRect* srcRectPtr,
                            int maxTileSize,
                            int* tileSize,
                            SkIRect* clippedSubset) const;
     // Just returns the predicate, not the out-tileSize or out-clippedSubset, as they are not
     // needed at the moment.
     bool shouldTileImage(const SkImage* image, const SkRect* srcRectPtr,
                          SkCanvas::SrcRectConstraint constraint, SkFilterQuality quality,
                          const SkMatrix& viewMatrix, const SkMatrix& srcToDstRect) const;

     sk_sp<SkSpecialImage> filterTexture(SkSpecialImage*,
                                         int left, int top,
                                         SkIPoint* offset,
                                         const SkImageFilter* filter);

     // Splits bitmap into tiles of tileSize and draws them using separate textures for each tile.
     void drawTiledBitmap(const SkBitmap& bitmap,
                          const SkMatrix& viewMatrix,
                          const SkMatrix& srcToDstMatrix,
                          const SkRect& srcRect,
                          const SkIRect& clippedSrcRect,
                          const GrSamplerState& params,
                          const SkPaint& paint,
                          SkCanvas::SrcRectConstraint,
                          int tileSize,
                          bool bicubic);

     // Used by drawTiledBitmap to draw each tile.
     void drawBitmapTile(const SkBitmap&,
                         const SkMatrix& viewMatrix,
                         const SkRect& dstRect,
                         const SkRect& srcRect,
                         const GrSamplerState& samplerState,
                         const SkPaint& paint,
                         SkCanvas::SrcRectConstraint,
                         bool bicubic,
                         bool needsTextureDomain);

     void drawPinnedTextureProxy(sk_sp<GrTextureProxy>,
                                 uint32_t pinnedUniqueID,
                                 SkColorSpace*,
                                 SkAlphaType alphaType,
                                 const SkRect* srcRect,
                                 const SkRect* dstRect,
                                 SkCanvas::SrcRectConstraint,
                                 const SkMatrix& viewMatrix,
                                 const SkPaint&);

     void drawTextureMaker(GrTextureMaker* maker,
                           int imageW,
                           int imageH,
                           const SkRect* srcRect,
                           const SkRect* dstRect,
                           SkCanvas::SrcRectConstraint,
                           const SkMatrix& viewMatrix,
                           const SkPaint&);

     void drawTextureProducer(GrTextureProducer*,
                              const SkRect* srcRect,
                              const SkRect* dstRect,
                              SkCanvas::SrcRectConstraint,
                              const SkMatrix& viewMatrix,
                              const SkPaint&);

     void drawTextureProducerImpl(GrTextureProducer*,
                                  const SkRect& clippedSrcRect,
                                  const SkRect& clippedDstRect,
                                  SkCanvas::SrcRectConstraint,
                                  const SkMatrix& viewMatrix,
                                  const SkMatrix& srcToDstMatrix,
                                  const SkPaint&);

     void drawProducerLattice(GrTextureProducer*, std::unique_ptr<SkLatticeIter>, const SkRect& dst,
                              const SkPaint&);

     void drawStrokedLine(const SkPoint pts[2], const SkPaint&);

     void wireframeVertices(SkVertices::VertexMode, int vertexCount, const SkPoint verts[],
                            SkBlendMode, const uint16_t indices[], int indexCount, const SkPaint&);

     static sk_sp<GrRenderTargetContext> MakeRenderTargetContext(GrContext*,
                                                                 SkBudgeted,
                                                                 const SkImageInfo&,
                                                                 int sampleCount,
                                                                 GrSurfaceOrigin,
                                                                 const SkSurfaceProps*,
                                                                 GrMipMapped);

     friend class GrAtlasTextContext;
     friend class SkSurface_Gpu;      // for access to surfaceProps
     typedef SkClipStackDevice INHERITED;
 };

 #endif
	/*
	* Copyright 2010 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#ifndef SkGpuDevice_DEFINED
	#define SkGpuDevice_DEFINED

	#include "GrClipStackClip.h"
	#include "GrContext.h"
	#include "GrContextPriv.h"
	#include "GrRenderTargetContext.h"
	#include "GrTypes.h"
	#include "SkBitmap.h"
	#include "SkClipStackDevice.h"
	#include "SkGr.h"
	#include "SkPicture.h"
	#include "SkRegion.h"
	#include "SkSurface.h"

	class GrAccelData;
	class GrTextureMaker;
	class GrTextureProducer;
	struct GrCachedLayer;

	class SkSpecialImage;

	/**
	* Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the
	* canvas.
	*/
	class SkGpuDevice : public SkClipStackDevice {
	public:
	enum InitContents {
	kClear_InitContents,
	kUninit_InitContents
	};

	/**
	* Creates an SkGpuDevice from a GrRenderTargetContext whose backing width/height is
	* different than its actual width/height (e.g., approx-match scratch texture).
	*/
	static sk_sp<SkGpuDevice> Make(GrContext*, sk_sp<GrRenderTargetContext> renderTargetContext,
	int width, int height, InitContents);

	/**
	* New device that will create an offscreen renderTarget based on the ImageInfo and
	* sampleCount. The mipMapped flag tells the gpu to create the underlying render target with
	* mips. The Budgeted param controls whether the device's backing store counts against the
	* resource cache budget. On failure, returns nullptr.
	* This entry point creates a kExact backing store. It is used when creating SkGpuDevices
	* for SkSurfaces.
	*/
	static sk_sp<SkGpuDevice> Make(GrContext*, SkBudgeted, const SkImageInfo&,
	int sampleCount, GrSurfaceOrigin, const SkSurfaceProps*,
	GrMipMapped mipMapped, InitContents);

	~SkGpuDevice() override {}

	GrContext* context() const override { return fContext.get(); }

	// set all pixels to 0
	void clearAll();

	void replaceRenderTargetContext(bool shouldRetainContent);

	GrRenderTargetContext* accessRenderTargetContext() override;

	void drawPaint(const SkPaint& paint) override;
	void drawPoints(SkCanvas::PointMode mode, size_t count, const SkPoint[],
	const SkPaint& paint) override;
	void drawRect(const SkRect& r, const SkPaint& paint) override;
	void drawRRect(const SkRRect& r, const SkPaint& paint) override;
	void drawDRRect(const SkRRect& outer, const SkRRect& inner,
	const SkPaint& paint) override;
	void drawRegion(const SkRegion& r, const SkPaint& paint) override;
	void drawOval(const SkRect& oval, const SkPaint& paint) override;
	void drawArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle,
	bool useCenter, const SkPaint& paint) override;
	void drawPath(const SkPath& path, const SkPaint& paint,
	const SkMatrix* prePathMatrix, bool pathIsMutable) override;
	void drawBitmap(const SkBitmap&, SkScalar x, SkScalar y,
	const SkPaint&) override;
	void drawBitmapRect(const SkBitmap&, const SkRect* srcOrNull, const SkRect& dst,
	const SkPaint& paint, SkCanvas::SrcRectConstraint) override;
	void drawSprite(const SkBitmap& bitmap, int x, int y,
	const SkPaint& paint) override;
	void drawText(const void* text, size_t len, SkScalar x, SkScalar y,
	const SkPaint&) override;
	void drawPosText(const void* text, size_t len, const SkScalar pos[],
	int scalarsPerPos, const SkPoint& offset, const SkPaint&) override;
	void drawTextBlob(const SkTextBlob*, SkScalar x, SkScalar y,
	const SkPaint& paint, SkDrawFilter* drawFilter) override;
	void drawVertices(const SkVertices*, SkBlendMode, const SkPaint&) override;
	void drawShadow(const SkPath&, const SkDrawShadowRec&) override;
	void drawAtlas(const SkImage* atlas, const SkRSXform[], const SkRect[],
	const SkColor[], int count, SkBlendMode, const SkPaint&) override;
	void drawDevice(SkBaseDevice*, int x, int y, const SkPaint&) override;

	void drawImage(const SkImage*, SkScalar x, SkScalar y, const SkPaint&) override;
	void drawImageRect(const SkImage, const SkRect src, const SkRect& dst,
	const SkPaint&, SkCanvas::SrcRectConstraint) override;

	void drawImageNine(const SkImage* image, const SkIRect& center,
	const SkRect& dst, const SkPaint& paint) override;
	void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
	const SkRect& dst, const SkPaint& paint) override;

	void drawImageLattice(const SkImage*, const SkCanvas::Lattice&,
	const SkRect& dst, const SkPaint&) override;
	void drawBitmapLattice(const SkBitmap&, const SkCanvas::Lattice&,
	const SkRect& dst, const SkPaint&) override;

	void drawSpecial(SkSpecialImage*, int left, int top, const SkPaint& paint,
	SkImage*, const SkMatrix&) override;
	sk_sp<SkSpecialImage> makeSpecial(const SkBitmap&) override;
	sk_sp<SkSpecialImage> makeSpecial(const SkImage*) override;
	sk_sp<SkSpecialImage> snapSpecial() override;

	void flush() override;
	GrSemaphoresSubmitted flushAndSignalSemaphores(int numSemaphores,
	GrBackendSemaphore signalSemaphores[]);
	bool wait(int numSemaphores, const GrBackendSemaphore* waitSemaphores);

	bool onAccessPixels(SkPixmap*) override;

	protected:
	bool onReadPixels(const SkPixmap&, int, int) override;
	bool onWritePixels(const SkPixmap&, int, int) override;

	private:
	// We want these unreffed in RenderTargetContext, GrContext order.
	sk_sp<GrContext> fContext;
	sk_sp<GrRenderTargetContext> fRenderTargetContext;

	SkISize fSize;
	bool fOpaque;

	enum Flags {
	kNeedClear_Flag = 1 << 0, //!< Surface requires an initial clear
	kIsOpaque_Flag = 1 << 1, //!< Hint from client that rendering to this device will be
	// opaque even if the config supports alpha.
	};
	static bool CheckAlphaTypeAndGetFlags(const SkImageInfo* info, InitContents init,
	unsigned* flags);

	SkGpuDevice(GrContext*, sk_sp<GrRenderTargetContext>, int width, int height, unsigned flags);

	SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;

	sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&) override;

	SkImageFilterCache* getImageFilterCache() override;

	bool forceConservativeRasterClip() const override { return true; }

	GrClipStackClip clip() const { return GrClipStackClip(&this->cs()); }

	const GrCaps* caps() const { return fContext->contextPriv().caps(); }

	/**
	* Helper functions called by drawBitmapCommon. By the time these are called the SkDraw's
	* matrix, clip, and the device's render target has already been set on GrContext.
	*/

	// The tileSize and clippedSrcRect will be valid only if true is returned.
	bool shouldTileImageID(uint32_t imageID,
	const SkIRect& imageRect,
	const SkMatrix& viewMatrix,
	const SkMatrix& srcToDstRectMatrix,
	const GrSamplerState& params,
	const SkRect* srcRectPtr,
	int maxTileSize,
	int* tileSize,
	SkIRect* clippedSubset) const;
	// Just returns the predicate, not the out-tileSize or out-clippedSubset, as they are not
	// needed at the moment.
	bool shouldTileImage(const SkImage* image, const SkRect* srcRectPtr,
	SkCanvas::SrcRectConstraint constraint, SkFilterQuality quality,
	const SkMatrix& viewMatrix, const SkMatrix& srcToDstRect) const;

	sk_sp<SkSpecialImage> filterTexture(SkSpecialImage*,
	int left, int top,
	SkIPoint* offset,
	const SkImageFilter* filter);

	// Splits bitmap into tiles of tileSize and draws them using separate textures for each tile.
	void drawTiledBitmap(const SkBitmap& bitmap,
	const SkMatrix& viewMatrix,
	const SkMatrix& srcToDstMatrix,
	const SkRect& srcRect,
	const SkIRect& clippedSrcRect,
	const GrSamplerState& params,
	const SkPaint& paint,
	SkCanvas::SrcRectConstraint,
	int tileSize,
	bool bicubic);

	// Used by drawTiledBitmap to draw each tile.
	void drawBitmapTile(const SkBitmap&,
	const SkMatrix& viewMatrix,
	const SkRect& dstRect,
	const SkRect& srcRect,
	const GrSamplerState& samplerState,
	const SkPaint& paint,
	SkCanvas::SrcRectConstraint,
	bool bicubic,
	bool needsTextureDomain);

	void drawPinnedTextureProxy(sk_sp<GrTextureProxy>,
	uint32_t pinnedUniqueID,
	SkColorSpace*,
	SkAlphaType alphaType,
	const SkRect* srcRect,
	const SkRect* dstRect,
	SkCanvas::SrcRectConstraint,
	const SkMatrix& viewMatrix,
	const SkPaint&);

	void drawTextureMaker(GrTextureMaker* maker,
	int imageW,
	int imageH,
	const SkRect* srcRect,
	const SkRect* dstRect,
	SkCanvas::SrcRectConstraint,
	const SkMatrix& viewMatrix,
	const SkPaint&);

	void drawTextureProducer(GrTextureProducer*,
	const SkRect* srcRect,
	const SkRect* dstRect,
	SkCanvas::SrcRectConstraint,
	const SkMatrix& viewMatrix,
	const SkPaint&);

	void drawTextureProducerImpl(GrTextureProducer*,
	const SkRect& clippedSrcRect,
	const SkRect& clippedDstRect,
	SkCanvas::SrcRectConstraint,
	const SkMatrix& viewMatrix,
	const SkMatrix& srcToDstMatrix,
	const SkPaint&);

	void drawProducerLattice(GrTextureProducer*, std::unique_ptr<SkLatticeIter>, const SkRect& dst,
	const SkPaint&);

	void drawStrokedLine(const SkPoint pts[2], const SkPaint&);

	void wireframeVertices(SkVertices::VertexMode, int vertexCount, const SkPoint verts[],
	SkBlendMode, const uint16_t indices[], int indexCount, const SkPaint&);

	static sk_sp<GrRenderTargetContext> MakeRenderTargetContext(GrContext*,
	SkBudgeted,
	const SkImageInfo&,
	int sampleCount,
	GrSurfaceOrigin,
	const SkSurfaceProps*,
	GrMipMapped);

	friend class GrAtlasTextContext;
	friend class SkSurface_Gpu; // for access to surfaceProps
	typedef SkClipStackDevice INHERITED;
	};

	#endif