cc40f06db7
This is the first pass of making Gr*TextContext more generic and easily subclassed. The next stage will be making GrBitmapTextContext and GrDistanceFieldTextContext more similar by moving the SkDraw loop into each subclass. BUG=skia:2018 Committed: http://code.google.com/p/skia/source/detail?r=13142 R=bsalomon@google.com, reed@google.com Author: jvanverth@google.com Review URL: https://codereview.chromium.org/144283002 git-svn-id: http://skia.googlecode.com/svn/trunk@13165 2bbb7eff-a529-9590-31e7-b0007b416f81
222 lines
8.6 KiB
C++
222 lines
8.6 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 "SkRegion.h"
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#include "GrContext.h"
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#include "GrTextContext.h"
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struct SkDrawProcs;
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struct GrSkDrawProcs;
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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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/**
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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.
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*/
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static SkGpuDevice* Create(GrSurface* surface);
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/**
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* New device that will create an offscreen renderTarget based on the
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* config, width, height, 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. TODO: This can fail, replace with a factory function.
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*/
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SkGpuDevice(GrContext*, SkBitmap::Config, int width, int height, int sampleCount = 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 specified renderTarget.
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*/
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SkGpuDevice(GrContext*, GrRenderTarget*);
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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*);
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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 uint32_t getDeviceCapabilities() SK_OVERRIDE {
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return 0;
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}
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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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virtual SkBitmap::Config config() const SK_OVERRIDE;
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virtual void clear(SkColor color) SK_OVERRIDE;
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virtual void writePixels(const SkBitmap& bitmap, int x, int y,
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SkCanvas::Config8888 config8888) 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 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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/**
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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(SkImageFilter*) SK_OVERRIDE;
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virtual bool filterImage(SkImageFilter*, const SkBitmap&, const SkMatrix&,
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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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// overrides from SkBaseDevice
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virtual bool onReadPixels(const SkBitmap& bitmap,
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int x, int y,
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SkCanvas::Config8888 config8888) 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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GrTextContextManager* fTextContextManager;
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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*, bool cached);
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// used by createCompatibleDevice
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SkGpuDevice(GrContext*, GrTexture* texture, bool needClear);
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// override from SkBaseDevice
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virtual SkBaseDevice* onCreateCompatibleDevice(SkBitmap::Config config,
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int width, int height,
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bool isOpaque,
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Usage usage) SK_OVERRIDE;
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SkDrawProcs* initDrawForText(GrTextContext*);
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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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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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/**
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* Returns non-initialized instance.
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*/
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GrTextContext* getTextContext();
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typedef SkBitmapDevice INHERITED;
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};
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#endif
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