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/*
* 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 "SkGr.h"
#include "SkBitmap.h"
#include "SkClipStackDevice.h"
#include "SkPicture.h"
#include "SkRegion.h"
#include "SkSurface.h"
#include "GrClipStackClip.h"
#include "GrRenderTargetContext.h"
#include "GrContext.h"
#include "GrSurfacePriv.h"
#include "GrTypes.h"
class GrAccelData;
class GrTextureProducer;
struct GrCachedLayer;
class SkSpecialImage;
/**
* Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the
* canvas.
*/
class SK_API 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 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*, 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& bitmap, const SkMatrix&,
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;
bool onAccessPixels(SkPixmap*) override;
protected:
bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) override;
bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) override;
bool onShouldDisableLCD(const SkPaint&) const final;
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()); }
/**
* 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 GrSamplerParams& 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 GrSamplerParams& 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 GrSamplerParams& params,
const SkPaint& paint,
SkCanvas::SrcRectConstraint,
bool bicubic,
bool needsTextureDomain);
void drawTextureProducer(GrTextureProducer*,
const SkRect* srcRect,
const SkRect* dstRect,
SkCanvas::SrcRectConstraint,
const SkMatrix& viewMatrix,
const GrClip&,
const SkPaint&);
void drawTextureProducerImpl(GrTextureProducer*,
const SkRect& clippedSrcRect,
const SkRect& clippedDstRect,
SkCanvas::SrcRectConstraint,
const SkMatrix& viewMatrix,
const SkMatrix& srcToDstMatrix,
const GrClip&,
const SkPaint&);
bool drawFilledDRRect(const SkMatrix& viewMatrix, const SkRRect& outer,
const SkRRect& inner, const SkPaint& paint);
void drawProducerNine(GrTextureProducer*, const SkIRect& center,
const SkRect& dst, const SkPaint&);
void drawProducerLattice(GrTextureProducer*, const SkCanvas::Lattice& lattice,
const SkRect& dst, const SkPaint&);
bool drawDashLine(const SkPoint pts[2], const SkPaint& paint);
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*);
friend class GrAtlasTextContext;
friend class SkSurface_Gpu; // for access to surfaceProps
typedef SkClipStackDevice INHERITED;
};
#endif
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