| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrInOrderDrawBuffer_DEFINED |
| #define GrInOrderDrawBuffer_DEFINED |
| |
| #include "GrDrawTarget.h" |
| #include "GrAllocPool.h" |
| #include "GrAllocator.h" |
| #include "GrPath.h" |
| |
| #include "SkClipStack.h" |
| #include "SkStrokeRec.h" |
| #include "SkTemplates.h" |
| #include "SkTypes.h" |
| |
| class GrGpu; |
| class GrIndexBufferAllocPool; |
| class GrVertexBufferAllocPool; |
| |
| /** |
| * GrInOrderDrawBuffer is an implementation of GrDrawTarget that queues up draws for eventual |
| * playback into a GrGpu. In theory one draw buffer could playback into another. When index or |
| * vertex buffers are used as geometry sources it is the callers the draw buffer only holds |
| * references to the buffers. It is the callers responsibility to ensure that the data is still |
| * valid when the draw buffer is played back into a GrGpu. Similarly, it is the caller's |
| * responsibility to ensure that all referenced textures, buffers, and render-targets are associated |
| * in the GrGpu object that the buffer is played back into. The buffer requires VB and IB pools to |
| * store geometry. |
| */ |
| class GrInOrderDrawBuffer : public GrDrawTarget { |
| public: |
| |
| /** |
| * Creates a GrInOrderDrawBuffer |
| * |
| * @param gpu the gpu object that this draw buffer flushes to. |
| * @param vertexPool pool where vertices for queued draws will be saved when |
| * the vertex source is either reserved or array. |
| * @param indexPool pool where indices for queued draws will be saved when |
| * the index source is either reserved or array. |
| */ |
| GrInOrderDrawBuffer(GrGpu* gpu, |
| GrVertexBufferAllocPool* vertexPool, |
| GrIndexBufferAllocPool* indexPool); |
| |
| virtual ~GrInOrderDrawBuffer(); |
| |
| /** |
| * Empties the draw buffer of any queued up draws. This must not be called while inside an |
| * unbalanced pushGeometrySource(). The current draw state and clip are preserved. |
| */ |
| void reset(); |
| |
| /** |
| * This plays the queued up draws to its GrGpu target. It also resets this object (i.e. flushing |
| * is destructive). This buffer must not have an active reserved vertex or index source. Any |
| * reserved geometry on the target will be finalized because it's geometry source will be pushed |
| * before flushing and popped afterwards. |
| */ |
| void flush(); |
| |
| // tracking for draws |
| virtual DrawToken getCurrentDrawToken() { return DrawToken(this, fDrawID); } |
| |
| // overrides from GrDrawTarget |
| virtual bool geometryHints(int* vertexCount, |
| int* indexCount) const SK_OVERRIDE; |
| virtual void clear(const SkIRect* rect, |
| GrColor color, |
| GrRenderTarget* renderTarget = NULL) SK_OVERRIDE; |
| |
| virtual void initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) SK_OVERRIDE; |
| |
| protected: |
| virtual void clipWillBeSet(const GrClipData* newClip) SK_OVERRIDE; |
| |
| private: |
| enum Cmd { |
| kDraw_Cmd = 1, |
| kStencilPath_Cmd = 2, |
| kSetState_Cmd = 3, |
| kSetClip_Cmd = 4, |
| kClear_Cmd = 5, |
| kCopySurface_Cmd = 6, |
| kFillPath_Cmd = 7, |
| }; |
| |
| class DrawRecord : public DrawInfo { |
| public: |
| DrawRecord(const DrawInfo& info) : DrawInfo(info) {} |
| const GrVertexBuffer* fVertexBuffer; |
| const GrIndexBuffer* fIndexBuffer; |
| }; |
| |
| struct StencilPath : public ::SkNoncopyable { |
| StencilPath(); |
| |
| SkAutoTUnref<const GrPath> fPath; |
| SkStrokeRec fStroke; |
| SkPath::FillType fFill; |
| }; |
| |
| struct FillPath : public ::SkNoncopyable { |
| FillPath(); |
| |
| SkAutoTUnref<const GrPath> fPath; |
| SkStrokeRec fStroke; |
| SkPath::FillType fFill; |
| GrDeviceCoordTexture fDstCopy; |
| }; |
| |
| struct Clear : public ::SkNoncopyable { |
| Clear() : fRenderTarget(NULL) {} |
| ~Clear() { SkSafeUnref(fRenderTarget); } |
| |
| SkIRect fRect; |
| GrColor fColor; |
| GrRenderTarget* fRenderTarget; |
| }; |
| |
| struct CopySurface : public ::SkNoncopyable { |
| SkAutoTUnref<GrSurface> fDst; |
| SkAutoTUnref<GrSurface> fSrc; |
| SkIRect fSrcRect; |
| SkIPoint fDstPoint; |
| }; |
| |
| // overrides from GrDrawTarget |
| virtual void onDraw(const DrawInfo&) SK_OVERRIDE; |
| virtual void onDrawRect(const SkRect& rect, |
| const SkMatrix* matrix, |
| const SkRect* localRect, |
| const SkMatrix* localMatrix) SK_OVERRIDE; |
| virtual void onStencilPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType) SK_OVERRIDE; |
| virtual void onFillPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType, |
| const GrDeviceCoordTexture* dstCopy) SK_OVERRIDE; |
| virtual bool onReserveVertexSpace(size_t vertexSize, |
| int vertexCount, |
| void** vertices) SK_OVERRIDE; |
| virtual bool onReserveIndexSpace(int indexCount, |
| void** indices) SK_OVERRIDE; |
| virtual void releaseReservedVertexSpace() SK_OVERRIDE; |
| virtual void releaseReservedIndexSpace() SK_OVERRIDE; |
| virtual void onSetVertexSourceToArray(const void* vertexArray, |
| int vertexCount) SK_OVERRIDE; |
| virtual void onSetIndexSourceToArray(const void* indexArray, |
| int indexCount) SK_OVERRIDE; |
| virtual void releaseVertexArray() SK_OVERRIDE; |
| virtual void releaseIndexArray() SK_OVERRIDE; |
| virtual void geometrySourceWillPush() SK_OVERRIDE; |
| virtual void geometrySourceWillPop(const GeometrySrcState& restoredState) SK_OVERRIDE; |
| virtual void willReserveVertexAndIndexSpace(int vertexCount, |
| int indexCount) SK_OVERRIDE; |
| virtual bool onCopySurface(GrSurface* dst, |
| GrSurface* src, |
| const SkIRect& srcRect, |
| const SkIPoint& dstPoint) SK_OVERRIDE; |
| virtual bool onCanCopySurface(GrSurface* dst, |
| GrSurface* src, |
| const SkIRect& srcRect, |
| const SkIPoint& dstPoint) SK_OVERRIDE; |
| |
| bool quickInsideClip(const SkRect& devBounds); |
| |
| // Attempts to concat instances from info onto the previous draw. info must represent an |
| // instanced draw. The caller must have already recorded a new draw state and clip if necessary. |
| int concatInstancedDraw(const DrawInfo& info); |
| |
| // we lazily record state and clip changes in order to skip clips and states that have no |
| // effect. |
| bool needsNewState() const; |
| bool needsNewClip() const; |
| |
| // these functions record a command |
| void recordState(); |
| void recordClip(); |
| DrawRecord* recordDraw(const DrawInfo&); |
| StencilPath* recordStencilPath(); |
| FillPath* recordFillPath(); |
| Clear* recordClear(); |
| CopySurface* recordCopySurface(); |
| |
| // TODO: Use a single allocator for commands and records |
| enum { |
| kCmdPreallocCnt = 32, |
| kDrawPreallocCnt = 8, |
| kStencilPathPreallocCnt = 8, |
| kFillPathPreallocCnt = 8, |
| kStatePreallocCnt = 8, |
| kClipPreallocCnt = 8, |
| kClearPreallocCnt = 4, |
| kGeoPoolStatePreAllocCnt = 4, |
| kCopySurfacePreallocCnt = 4, |
| }; |
| |
| SkSTArray<kCmdPreallocCnt, uint8_t, true> fCmds; |
| GrSTAllocator<kDrawPreallocCnt, DrawRecord> fDraws; |
| GrSTAllocator<kStatePreallocCnt, StencilPath> fStencilPaths; |
| GrSTAllocator<kStatePreallocCnt, FillPath> fFillPaths; |
| GrSTAllocator<kStatePreallocCnt, GrDrawState::DeferredState> fStates; |
| GrSTAllocator<kClearPreallocCnt, Clear> fClears; |
| GrSTAllocator<kCopySurfacePreallocCnt, CopySurface> fCopySurfaces; |
| GrSTAllocator<kClipPreallocCnt, SkClipStack> fClips; |
| GrSTAllocator<kClipPreallocCnt, SkIPoint> fClipOrigins; |
| |
| GrDrawTarget* fDstGpu; |
| |
| bool fClipSet; |
| |
| enum ClipProxyState { |
| kUnknown_ClipProxyState, |
| kValid_ClipProxyState, |
| kInvalid_ClipProxyState |
| }; |
| ClipProxyState fClipProxyState; |
| SkRect fClipProxy; |
| |
| GrVertexBufferAllocPool& fVertexPool; |
| |
| GrIndexBufferAllocPool& fIndexPool; |
| |
| struct GeometryPoolState { |
| const GrVertexBuffer* fPoolVertexBuffer; |
| int fPoolStartVertex; |
| const GrIndexBuffer* fPoolIndexBuffer; |
| int fPoolStartIndex; |
| // caller may conservatively over reserve vertices / indices. |
| // we release unused space back to allocator if possible |
| // can only do this if there isn't an intervening pushGeometrySource() |
| size_t fUsedPoolVertexBytes; |
| size_t fUsedPoolIndexBytes; |
| }; |
| SkSTArray<kGeoPoolStatePreAllocCnt, GeometryPoolState> fGeoPoolStateStack; |
| |
| virtual bool isIssued(uint32_t drawID) { return drawID != fDrawID; } |
| |
| bool fFlushing; |
| uint32_t fDrawID; |
| |
| typedef GrDrawTarget INHERITED; |
| }; |
| |
| #endif |