a6a8f00a39
TBR=robertphilips Author: reed@chromium.org Review URL: https://codereview.chromium.org/302253002
232 lines
9.3 KiB
C++
232 lines
9.3 KiB
C++
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/*
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* Copyright 2010 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkGpuDevice_DEFINED
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#define SkGpuDevice_DEFINED
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#include "SkGr.h"
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#include "SkBitmap.h"
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#include "SkBitmapDevice.h"
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#include "SkPicture.h"
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#include "SkRegion.h"
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#include "GrContext.h"
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struct SkDrawProcs;
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struct GrSkDrawProcs;
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class GrTextContext;
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/**
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* Subclass of SkBitmapDevice, which directs all drawing to the GrGpu owned by the
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* canvas.
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*/
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class SK_API SkGpuDevice : public SkBitmapDevice {
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public:
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enum Flags {
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kNeedClear_Flag = 1 << 0, //!< Surface requires an initial clear
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kCached_Flag = 1 << 1, //!< Surface is cached and needs to be unlocked when released
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kDFFonts_Flag = 1 << 2, //!< Surface should render fonts using signed distance fields
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};
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/**
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* Creates an SkGpuDevice from a GrSurface. This will fail if the surface is not a render
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* target. The caller owns a ref on the returned device. If the surface is cached,
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* the kCached_Flag should be specified to make the device responsible for unlocking
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* the surface when it is released.
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*/
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static SkGpuDevice* Create(GrSurface* surface, unsigned flags = 0);
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/**
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* New device that will create an offscreen renderTarget based on the
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* ImageInfo and sampleCount. The device's storage will not
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* count against the GrContext's texture cache budget. The device's pixels
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* will be uninitialized. On failure, returns NULL.
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*/
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static SkGpuDevice* Create(GrContext*, const SkImageInfo&, int sampleCount);
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/**
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* DEPRECATED -- need to make this private, call Create(surface)
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* New device that will render to the specified renderTarget.
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*/
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SkGpuDevice(GrContext*, GrRenderTarget*, unsigned flags = 0);
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/**
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* DEPRECATED -- need to make this private, call Create(surface)
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* New device that will render to the texture (as a rendertarget).
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* The GrTexture's asRenderTarget() must be non-NULL or device will not
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* function.
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*/
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SkGpuDevice(GrContext*, GrTexture*, unsigned flags = 0);
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virtual ~SkGpuDevice();
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GrContext* context() const { return fContext; }
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virtual GrRenderTarget* accessRenderTarget() SK_OVERRIDE;
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// overrides from SkBaseDevice
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virtual int width() const SK_OVERRIDE {
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return NULL == fRenderTarget ? 0 : fRenderTarget->width();
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}
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virtual int height() const SK_OVERRIDE {
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return NULL == fRenderTarget ? 0 : fRenderTarget->height();
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}
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virtual bool isOpaque() const SK_OVERRIDE {
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return NULL == fRenderTarget ? false
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: kRGB_565_GrPixelConfig == fRenderTarget->config();
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}
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#ifdef SK_SUPPORT_LEGACY_DEVICE_CONFIG
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virtual SkBitmap::Config config() const SK_OVERRIDE;
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#endif
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virtual void clear(SkColor color) SK_OVERRIDE;
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virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
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const SkPoint[], const SkPaint& paint) SK_OVERRIDE;
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virtual void drawRect(const SkDraw&, const SkRect& r,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawRRect(const SkDraw&, const SkRRect& r,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawDRRect(const SkDraw& draw, const SkRRect& outer,
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const SkRRect& inner, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawOval(const SkDraw&, const SkRect& oval,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawPath(const SkDraw&, const SkPath& path,
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const SkPaint& paint, const SkMatrix* prePathMatrix,
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bool pathIsMutable) SK_OVERRIDE;
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virtual void drawBitmap(const SkDraw&, const SkBitmap& bitmap,
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const SkMatrix&, const SkPaint&) SK_OVERRIDE;
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virtual void drawBitmapRect(const SkDraw&, const SkBitmap&,
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const SkRect* srcOrNull, const SkRect& dst,
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const SkPaint& paint,
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SkCanvas::DrawBitmapRectFlags flags) SK_OVERRIDE;
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virtual void drawSprite(const SkDraw&, const SkBitmap& bitmap,
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int x, int y, const SkPaint& paint);
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virtual void drawText(const SkDraw&, const void* text, size_t len,
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SkScalar x, SkScalar y, const SkPaint&) SK_OVERRIDE;
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virtual void drawPosText(const SkDraw&, const void* text, size_t len,
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const SkScalar pos[], SkScalar constY,
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int scalarsPerPos, const SkPaint&) SK_OVERRIDE;
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virtual void drawTextOnPath(const SkDraw&, const void* text, size_t len,
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const SkPath& path, const SkMatrix* matrix,
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const SkPaint&) SK_OVERRIDE;
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virtual void drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount,
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const SkPoint verts[], const SkPoint texs[],
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const SkColor colors[], SkXfermode* xmode,
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const uint16_t indices[], int indexCount,
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const SkPaint&) SK_OVERRIDE;
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virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
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const SkPaint&) SK_OVERRIDE;
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virtual bool filterTextFlags(const SkPaint&, TextFlags*) SK_OVERRIDE;
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virtual void flush() SK_OVERRIDE;
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virtual void onAttachToCanvas(SkCanvas* canvas) SK_OVERRIDE;
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virtual void onDetachFromCanvas() SK_OVERRIDE;
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virtual const SkBitmap& onAccessBitmap() SK_OVERRIDE;
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/**
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* Make's this device's rendertarget current in the underlying 3D API.
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* Also implicitly flushes.
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*/
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virtual void makeRenderTargetCurrent();
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virtual bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE;
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virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
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const SkImageFilter::Context&,
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SkBitmap*, SkIPoint*) SK_OVERRIDE;
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class SkAutoCachedTexture; // used internally
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protected:
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virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) SK_OVERRIDE;
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virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
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/** PRIVATE / EXPERIMENTAL -- do not call */
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virtual void EXPERIMENTAL_optimize(SkPicture* picture) SK_OVERRIDE;
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/** PRIVATE / EXPERIMENTAL -- do not call */
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virtual void EXPERIMENTAL_purge(SkPicture* picture) SK_OVERRIDE;
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/** PRIVATE / EXPERIMENTAL -- do not call */
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virtual bool EXPERIMENTAL_drawPicture(SkCanvas* canvas, SkPicture* picture) SK_OVERRIDE;
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private:
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GrContext* fContext;
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GrSkDrawProcs* fDrawProcs;
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GrClipData fClipData;
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GrTextContext* fMainTextContext;
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GrTextContext* fFallbackTextContext;
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// state for our render-target
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GrRenderTarget* fRenderTarget;
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bool fNeedClear;
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// called from rt and tex cons
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void initFromRenderTarget(GrContext*, GrRenderTarget*, unsigned flags);
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virtual SkBaseDevice* onCreateDevice(const SkImageInfo&, Usage) SK_OVERRIDE;
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virtual SkSurface* newSurface(const SkImageInfo&) SK_OVERRIDE;
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// sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
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// SkDraw's matrix and draw in device coords.
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void prepareDraw(const SkDraw&, bool forceIdentity);
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/**
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* Implementation for both drawBitmap and drawBitmapRect.
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*/
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void drawBitmapCommon(const SkDraw&,
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const SkBitmap& bitmap,
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const SkRect* srcRectPtr,
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const SkSize* dstSizePtr, // ignored iff srcRectPtr == NULL
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const SkPaint&,
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SkCanvas::DrawBitmapRectFlags flags);
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/**
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* Helper functions called by drawBitmapCommon. By the time these are called the SkDraw's
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* matrix, clip, and the device's render target has already been set on GrContext.
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*/
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// The tileSize and clippedSrcRect will be valid only if true is returned.
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bool shouldTileBitmap(const SkBitmap& bitmap,
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const GrTextureParams& sampler,
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const SkRect* srcRectPtr,
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int maxTileSize,
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int* tileSize,
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SkIRect* clippedSrcRect) const;
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void internalDrawBitmap(const SkBitmap&,
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const SkRect&,
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const GrTextureParams& params,
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const SkPaint& paint,
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SkCanvas::DrawBitmapRectFlags flags,
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bool bicubic,
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bool needsTextureDomain);
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void drawTiledBitmap(const SkBitmap& bitmap,
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const SkRect& srcRect,
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const SkIRect& clippedSrcRect,
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const GrTextureParams& params,
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const SkPaint& paint,
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SkCanvas::DrawBitmapRectFlags flags,
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int tileSize,
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bool bicubic);
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bool drawDashLine(const SkPoint pts[2], const SkPaint& paint);
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static SkPicture::AccelData::Key ComputeAccelDataKey();
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typedef SkBitmapDevice INHERITED;
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};
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#endif
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