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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 "SkDevice.h"
#include "SkPicture.h"
#include "SkRegion.h"
#include "GrContext.h"
#include "GrSurfacePriv.h"
struct SkDrawProcs;
struct GrSkDrawProcs;
class GrAccelData;
struct GrCachedLayer;
class GrTextContext;
/**
* Subclass of SkBaseDevice, which directs all drawing to the GrGpu owned by the
* canvas.
*/
class SK_API SkGpuDevice : public SkBaseDevice {
public:
enum Flags {
kNeedClear_Flag = 1 << 0, //!< Surface requires an initial clear
kDFText_Flag = 1 << 1, //!< Surface should render text using signed distance fields
};
/**
* Creates an SkGpuDevice from a GrSurface. This will fail if the surface is not a render
* target. The caller owns a ref on the returned device. If the surface is cached,
* the kCached_Flag should be specified to make the device responsible for unlocking
* the surface when it is released.
*/
static SkGpuDevice* Create(GrSurface* surface, const SkSurfaceProps&, unsigned flags = 0);
/**
* New device that will create an offscreen renderTarget based on the
* ImageInfo and sampleCount. The device's storage will not
* count against the GrContext's texture cache budget. The device's pixels
* will be uninitialized. On failure, returns NULL.
*/
static SkGpuDevice* Create(GrContext*, const SkImageInfo&, const SkSurfaceProps&,
int sampleCount);
virtual ~SkGpuDevice();
SkGpuDevice* cloneDevice(const SkSurfaceProps& props) {
SkBaseDevice* dev = this->onCreateCompatibleDevice(CreateInfo(this->imageInfo(),
kGeneral_Usage,
props.pixelGeometry()));
return static_cast<SkGpuDevice*>(dev);
}
GrContext* context() const { return fContext; }
virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE;
virtual SkImageInfo imageInfo() const SK_OVERRIDE {
return fRenderTarget ? fRenderTarget->surfacePriv().info() : SkImageInfo::MakeUnknown();
}
virtual void clear(SkColor color) SK_OVERRIDE;
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 drawRRect(const SkDraw&, const SkRRect& r,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawDRRect(const SkDraw& draw, const SkRRect& outer,
const SkRRect& inner, const SkPaint& paint) SK_OVERRIDE;
virtual void drawOval(const SkDraw&, const SkRect& oval,
const SkPaint& paint) SK_OVERRIDE;
virtual void drawPath(const SkDraw&, const SkPath& path,
const SkPaint& paint, const SkMatrix* prePathMatrix,
bool pathIsMutable) SK_OVERRIDE;
virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
const SkMatrix&, const SkPaint&) SK_OVERRIDE;
virtual void drawBitmapRect(const SkDraw&, const SkBitmap&,
const SkRect* srcOrNull, const SkRect& dst,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags) SK_OVERRIDE;
virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
int x, int y, const SkPaint& paint);
virtual void drawText(const SkDraw&, const void* text, size_t len,
SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE;
virtual void drawPosText(const SkDraw&, const void* text, size_t len,
const SkScalar pos[], int scalarsPerPos,
const SkPoint& offset, const SkPaint&) SK_OVERRIDE;
virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
const SkPath& path, const SkMatrix* matrix,
const SkPaint&) SK_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&) SK_OVERRIDE;
virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
const SkPaint&) SK_OVERRIDE;
virtual void flush() SK_OVERRIDE;
virtual void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE;
virtual void onDetachFromCanvas() SK_OVERRIDE;
virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE;
virtual bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE;
virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
const SkImageFilter::Context&,
SkBitmap*, SkIPoint*) SK_OVERRIDE;
protected:
virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) SK_OVERRIDE;
virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
bool onShouldDisableLCD(const SkPaint&) const SK_OVERRIDE;
/** PRIVATE / EXPERIMENTAL -- do not call */
virtual bool EXPERIMENTAL_drawPicture(SkCanvas* canvas, const SkPicture* picture,
const SkMatrix*, const SkPaint*) SK_OVERRIDE;
private:
GrContext* fContext;
GrSkDrawProcs* fDrawProcs;
GrClipData fClipData;
GrTextContext* fTextContext;
// state for our render-target
GrRenderTarget* fRenderTarget;
uint32_t fFlags;
// remove when our clients don't rely on accessBitmap()
SkBitmap fLegacyBitmap;
SkGpuDevice(GrSurface*, const SkSurfaceProps&, unsigned flags = 0);
virtual SkBaseDevice* onCreateCompatibleDevice(const CreateInfo&) SK_OVERRIDE;
virtual SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) SK_OVERRIDE;
virtual SkImageFilter::Cache* getImageFilterCache() SK_OVERRIDE;
// temporarily change the return to false, until we understand the issues with filters and persp
virtual bool forceConservativeRasterClip() const SK_OVERRIDE { return true; }
// sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
// SkDraw's matrix and draw in device coords.
void prepareDraw(const SkDraw&, bool forceIdentity);
/**
* Implementation for both drawBitmap and drawBitmapRect.
*/
void drawBitmapCommon(const SkDraw&,
const SkBitmap& bitmap,
const SkRect* srcRectPtr,
const SkSize* dstSizePtr, // ignored iff srcRectPtr == NULL
const SkPaint&,
SkCanvas::DrawBitmapRectFlags flags);
/**
* 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 shouldTileBitmap(const SkBitmap& bitmap,
const GrTextureParams& sampler,
const SkRect* srcRectPtr,
int maxTileSize,
int* tileSize,
SkIRect* clippedSrcRect) const;
void internalDrawBitmap(const SkBitmap&,
const SkRect&,
const GrTextureParams& params,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags,
bool bicubic,
bool needsTextureDomain);
void drawTiledBitmap(const SkBitmap& bitmap,
const SkRect& srcRect,
const SkIRect& clippedSrcRect,
const GrTextureParams& params,
const SkPaint& paint,
SkCanvas::DrawBitmapRectFlags flags,
int tileSize,
bool bicubic);
bool drawDashLine(const SkPoint pts[2], const SkPaint& paint);
bool filterTexture(GrContext*, GrTexture*, const SkImageFilter*,
const SkImageFilter::Context&,
SkBitmap* result, SkIPoint* offset);
static SkPicture::AccelData::Key ComputeAccelDataKey();
typedef SkBaseDevice INHERITED;
};
#endif
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