/* * 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 GrDrawTarget_DEFINED #define GrDrawTarget_DEFINED #include "GrClip.h" #include "GrClipMaskManager.h" #include "GrContext.h" #include "GrPathProcessor.h" #include "GrPrimitiveProcessor.h" #include "GrIndexBuffer.h" #include "GrPathRendering.h" #include "GrPipelineBuilder.h" #include "GrTraceMarker.h" #include "GrVertexBuffer.h" #include "SkClipStack.h" #include "SkMatrix.h" #include "SkPath.h" #include "SkStrokeRec.h" #include "SkTArray.h" #include "SkTLazy.h" #include "SkTypes.h" #include "SkXfermode.h" class GrBatch; class GrClip; class GrDrawTargetCaps; class GrGeometryProcessor; class GrPath; class GrPathRange; class GrPipeline; class GrDrawTarget : public SkRefCnt { public: SK_DECLARE_INST_COUNT(GrDrawTarget) typedef GrPathRange::PathIndexType PathIndexType; typedef GrPathRendering::PathTransformType PathTransformType; /////////////////////////////////////////////////////////////////////////// // The context may not be fully constructed and should not be used during GrDrawTarget // construction. GrDrawTarget(GrContext* context); virtual ~GrDrawTarget(); /** * Gets the capabilities of the draw target. */ const GrDrawTargetCaps* caps() const { return fCaps.get(); } /** * There are two types of "sources" of geometry (vertices and indices) for * draw calls made on the target. When performing an indexed draw, the * indices and vertices can use different source types. Once a source is * specified it can be used for multiple draws. However, the time at which * the geometry data is no longer editable depends on the source type. * * Sometimes it is necessary to perform a draw while upstack code has * already specified geometry that it isn't finished with. So there are push * and pop methods. This allows the client to push the sources, draw * something using alternate sources, and then pop to restore the original * sources. * * Aside from pushes and pops, a source remains valid until another source * is set or resetVertexSource / resetIndexSource is called. Drawing from * a reset source is an error. * * The two types of sources are: * * 1. Reserve. This is most useful when the caller has data it must * transform before drawing and is not long-lived. The caller requests * that the draw target make room for some amount of vertex and/or index * data. The target provides ptrs to hold the vertex and/or index data. * * The data is writable up until the next drawIndexed, drawNonIndexed, * drawIndexedInstances, drawRect, copySurface, or pushGeometrySource. At * this point the data is frozen and the ptrs are no longer valid. * * Where the space is allocated and how it is uploaded to the GPU is * subclass-dependent. * * 2. Vertex and Index Buffers. This is most useful for geometry that will * is long-lived. When the data in the buffer is consumed depends on the * GrDrawTarget subclass. For deferred subclasses the caller has to * guarantee that the data is still available in the buffers at playback. * (TODO: Make this more automatic as we have done for read/write pixels) */ /** * Reserves space for vertices and/or indices. Zero can be specifed as * either the vertex or index count if the caller desires to only reserve * space for only indices or only vertices. If zero is specifed for * vertexCount then the vertex source will be unmodified and likewise for * indexCount. * * If the function returns true then the reserve suceeded and the vertices * and indices pointers will point to the space created. * * If the target cannot make space for the request then this function will * return false. If vertexCount was non-zero then upon failure the vertex * source is reset and likewise for indexCount. * * The pointers to the space allocated for vertices and indices remain valid * until a drawIndexed, drawNonIndexed, drawIndexedInstances, drawRect, * copySurface, or push/popGeomtrySource is called. At that point logically a * snapshot of the data is made and the pointers are invalid. * * @param vertexCount the number of vertices to reserve space for. Can be * 0. Vertex size is queried from the current GrPipelineBuilder. * @param indexCount the number of indices to reserve space for. Can be 0. * @param vertices will point to reserved vertex space if vertexCount is * non-zero. Illegal to pass NULL if vertexCount > 0. * @param indices will point to reserved index space if indexCount is * non-zero. Illegal to pass NULL if indexCount > 0. */ bool reserveVertexAndIndexSpace(int vertexCount, size_t vertexStride, int indexCount, void** vertices, void** indices); /** * Provides hints to caller about the number of vertices and indices * that can be allocated cheaply. This can be useful if caller is reserving * space but doesn't know exactly how much geometry is needed. * * Also may hint whether the draw target should be flushed first. This is * useful for deferred targets. * * @param vertexCount in: hint about how many vertices the caller would * like to allocate. Vertex size is queried from the * current GrPipelineBuilder. * out: a hint about the number of vertices that can be * allocated cheaply. Negative means no hint. * Ignored if NULL. * @param indexCount in: hint about how many indices the caller would * like to allocate. * out: a hint about the number of indices that can be * allocated cheaply. Negative means no hint. * Ignored if NULL. * * @return true if target should be flushed based on the input values. */ virtual bool geometryHints(size_t vertexStride, int* vertexCount, int* indexCount) const; /** * Sets source of vertex data for the next draw. Data does not have to be * in the buffer until drawIndexed, drawNonIndexed, or drawIndexedInstances. * * @param buffer vertex buffer containing vertex data. Must be * unlocked before draw call. Vertex size is queried * from current GrPipelineBuilder. */ void setVertexSourceToBuffer(const GrVertexBuffer* buffer, size_t vertexStride); /** * Sets source of index data for the next indexed draw. Data does not have * to be in the buffer until drawIndexed. * * @param buffer index buffer containing indices. Must be unlocked * before indexed draw call. */ void setIndexSourceToBuffer(const GrIndexBuffer* buffer); /** * Resets vertex source. Drawing from reset vertices is illegal. Set vertex * source to reserved, array, or buffer before next draw. May be able to free * up temporary storage allocated by setVertexSourceToArray or * reserveVertexSpace. */ void resetVertexSource(); /** * Resets index source. Indexed Drawing from reset indices is illegal. Set * index source to reserved, array, or buffer before next indexed draw. May * be able to free up temporary storage allocated by setIndexSourceToArray * or reserveIndexSpace. */ void resetIndexSource(); /** * Query to find out if the vertex or index source is reserved. */ bool hasReservedVerticesOrIndices() const { return kReserved_GeometrySrcType == this->getGeomSrc().fVertexSrc || kReserved_GeometrySrcType == this->getGeomSrc().fIndexSrc; } /** * Pushes and resets the vertex/index sources. Any reserved vertex / index * data is finalized (i.e. cannot be updated after the matching pop but can * be drawn from). Must be balanced by a pop. */ void pushGeometrySource(); /** * Pops the vertex / index sources from the matching push. */ void popGeometrySource(); /** * Draws indexed geometry using the current state and current vertex / index * sources. * * @param type The type of primitives to draw. * @param startVertex the vertex in the vertex array/buffer corresponding * to index 0 * @param startIndex first index to read from index src. * @param vertexCount one greater than the max index. * @param indexCount the number of index elements to read. The index count * is effectively trimmed to the last completely * specified primitive. * @param devBounds optional bounds hint. This is a promise from the caller, * not a request for clipping. */ void drawIndexed(GrPipelineBuilder*, const GrGeometryProcessor*, GrPrimitiveType type, int startVertex, int startIndex, int vertexCount, int indexCount, const SkRect* devBounds = NULL); /** * Draws non-indexed geometry using the current state and current vertex * sources. * * @param type The type of primitives to draw. * @param startVertex the vertex in the vertex array/buffer corresponding * to index 0 * @param vertexCount one greater than the max index. * @param devBounds optional bounds hint. This is a promise from the caller, * not a request for clipping. */ void drawNonIndexed(GrPipelineBuilder*, const GrGeometryProcessor*, GrPrimitiveType type, int startVertex, int vertexCount, const SkRect* devBounds = NULL); // TODO devbounds should live on the batch void drawBatch(GrPipelineBuilder*, GrBatch*, const SkRect* devBounds = NULL); /** * Draws path into the stencil buffer. The fill must be either even/odd or * winding (not inverse or hairline). It will respect the HW antialias flag * on the GrPipelineBuilder (if possible in the 3D API). Note, we will never have an inverse * fill with stencil path */ void stencilPath(GrPipelineBuilder*, const GrPathProcessor*, const GrPath*, GrPathRendering::FillType); /** * Draws a path. Fill must not be a hairline. It will respect the HW * antialias flag on the GrPipelineBuilder (if possible in the 3D API). */ void drawPath(GrPipelineBuilder*, const GrPathProcessor*, const GrPath*, GrPathRendering::FillType); /** * Draws the aggregate path from combining multiple. Note that this will not * always be equivalent to back-to-back calls to drawPath(). It will respect * the HW antialias flag on the GrPipelineBuilder (if possible in the 3D API). * * @param pathRange Source paths to draw from * @param indices Array of path indices to draw * @param indexType Data type of the array elements in indexBuffer * @param transformValues Array of transforms for the individual paths * @param transformType Type of transforms in transformBuffer * @param count Number of paths to draw * @param fill Fill type for drawing all the paths */ void drawPaths(GrPipelineBuilder*, const GrPathProcessor*, const GrPathRange* pathRange, const void* indices, PathIndexType indexType, const float transformValues[], PathTransformType transformType, int count, GrPathRendering::FillType fill); /** * Helper function for drawing rects. It performs a geometry src push and pop * and thus will finalize any reserved geometry. * * @param rect the rect to draw * @param localRect optional rect that specifies local coords to map onto * rect. If NULL then rect serves as the local coords. * @param localMatrix Optional local matrix. The local coordinates are specified by localRect, * or if it is NULL by rect. This matrix applies to the coordinate implied by * that rectangle before it is input to GrCoordTransforms that read local * coordinates */ void drawRect(GrPipelineBuilder* pipelineBuilder, GrColor color, const SkMatrix& viewMatrix, const SkRect& rect, const SkRect* localRect, const SkMatrix* localMatrix) { this->onDrawRect(pipelineBuilder, color, viewMatrix, rect, localRect, localMatrix); } /** * Helper for drawRect when the caller doesn't need separate local rects or matrices. */ void drawSimpleRect(GrPipelineBuilder* ds, GrColor color, const SkMatrix& viewM, const SkRect& rect) { this->drawRect(ds, color, viewM, rect, NULL, NULL); } void drawSimpleRect(GrPipelineBuilder* ds, GrColor color, const SkMatrix& viewM, const SkIRect& irect) { SkRect rect = SkRect::Make(irect); this->drawRect(ds, color, viewM, rect, NULL, NULL); } /** * This call is used to draw multiple instances of some geometry with a * given number of vertices (V) and indices (I) per-instance. The indices in * the index source must have the form i[k+I] == i[k] + V. Also, all indices * i[kI] ... i[(k+1)I-1] must be elements of the range kV ... (k+1)V-1. As a * concrete example, the following index buffer for drawing a series of * quads each as two triangles each satisfies these conditions with V=4 and * I=6: * (0,1,2,0,2,3, 4,5,6,4,6,7, 8,9,10,8,10,11, ...) * * The call assumes that the pattern of indices fills the entire index * source. The size of the index buffer limits the number of instances that * can be drawn by the GPU in a single draw. However, the caller may specify * any (positive) number for instanceCount and if necessary multiple GPU * draws will be issued. Moreover, when drawIndexedInstances is called * multiple times it may be possible for GrDrawTarget to group them into a * single GPU draw. * * @param type the type of primitives to draw * @param instanceCount the number of instances to draw. Each instance * consists of verticesPerInstance vertices indexed by * indicesPerInstance indices drawn as the primitive * type specified by type. * @param verticesPerInstance The number of vertices in each instance (V * in the above description). * @param indicesPerInstance The number of indices in each instance (I * in the above description). * @param devBounds optional bounds hint. This is a promise from the caller, * not a request for clipping. */ void drawIndexedInstances(GrPipelineBuilder*, const GrGeometryProcessor*, GrPrimitiveType type, int instanceCount, int verticesPerInstance, int indicesPerInstance, const SkRect* devBounds = NULL); /** * Clear the passed in render target. Ignores the GrPipelineBuilder and clip. Clears the whole * thing if rect is NULL, otherwise just the rect. If canIgnoreRect is set then the entire * render target can be optionally cleared. */ void clear(const SkIRect* rect, GrColor color, bool canIgnoreRect, GrRenderTarget* renderTarget); /** * Discards the contents render target. **/ virtual void discard(GrRenderTarget*) = 0; /** * Called at start and end of gpu trace marking * GR_CREATE_GPU_TRACE_MARKER(marker_str, target) will automatically call these at the start * and end of a code block respectively */ void addGpuTraceMarker(const GrGpuTraceMarker* marker); void removeGpuTraceMarker(const GrGpuTraceMarker* marker); /** * Takes the current active set of markers and stores them for later use. Any current marker * in the active set is removed from the active set and the targets remove function is called. * These functions do not work as a stack so you cannot call save a second time before calling * restore. Also, it is assumed that when restore is called the current active set of markers * is empty. When the stored markers are added back into the active set, the targets add marker * is called. */ void saveActiveTraceMarkers(); void restoreActiveTraceMarkers(); /** * Copies a pixel rectangle from one surface to another. This call may finalize * reserved vertex/index data (as though a draw call was made). The src pixels * copied are specified by srcRect. They are copied to a rect of the same * size in dst with top left at dstPoint. If the src rect is clipped by the * src bounds then pixel values in the dst rect corresponding to area clipped * by the src rect are not overwritten. This method can fail and return false * depending on the type of surface, configs, etc, and the backend-specific * limitations. If rect is clipped out entirely by the src or dst bounds then * true is returned since there is no actual copy necessary to succeed. */ bool copySurface(GrSurface* dst, GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint); /** * Function that determines whether a copySurface call would succeed without actually * performing the copy. */ bool canCopySurface(const GrSurface* dst, const GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint); /** * Release any resources that are cached but not currently in use. This * is intended to give an application some recourse when resources are low. */ virtual void purgeResources() {}; //////////////////////////////////////////////////////////////////////////// class AutoReleaseGeometry : public ::SkNoncopyable { public: AutoReleaseGeometry(GrDrawTarget* target, int vertexCount, size_t vertexStride, int indexCount); AutoReleaseGeometry(); ~AutoReleaseGeometry(); bool set(GrDrawTarget* target, int vertexCount, size_t vertexStride, int indexCount); bool succeeded() const { return SkToBool(fTarget); } void* vertices() const { SkASSERT(this->succeeded()); return fVertices; } void* indices() const { SkASSERT(this->succeeded()); return fIndices; } SkPoint* positions() const { return static_cast(this->vertices()); } private: void reset(); GrDrawTarget* fTarget; void* fVertices; void* fIndices; }; //////////////////////////////////////////////////////////////////////////// /** * Saves the geometry src state at construction and restores in the destructor. It also saves * and then restores the vertex attrib state. */ class AutoGeometryPush : public ::SkNoncopyable { public: AutoGeometryPush(GrDrawTarget* target) { SkASSERT(target); fTarget = target; target->pushGeometrySource(); } ~AutoGeometryPush() { fTarget->popGeometrySource(); } private: GrDrawTarget* fTarget; }; /////////////////////////////////////////////////////////////////////////// // Draw execution tracking (for font atlases and other resources) class DrawToken { public: DrawToken(GrDrawTarget* drawTarget, uint32_t drawID) : fDrawTarget(drawTarget), fDrawID(drawID) {} bool isIssued() { return fDrawTarget && fDrawTarget->isIssued(fDrawID); } private: GrDrawTarget* fDrawTarget; uint32_t fDrawID; // this may wrap, but we're doing direct comparison // so that should be okay }; virtual DrawToken getCurrentDrawToken() { return DrawToken(this, 0); } /** * Used to communicate draws to GPUs / subclasses */ class DrawInfo { public: DrawInfo() { fDevBounds = NULL; } DrawInfo(const DrawInfo& di) { (*this) = di; } DrawInfo& operator =(const DrawInfo& di); GrPrimitiveType primitiveType() const { return fPrimitiveType; } int startVertex() const { return fStartVertex; } int startIndex() const { return fStartIndex; } int vertexCount() const { return fVertexCount; } int indexCount() const { return fIndexCount; } int verticesPerInstance() const { return fVerticesPerInstance; } int indicesPerInstance() const { return fIndicesPerInstance; } int instanceCount() const { return fInstanceCount; } void setPrimitiveType(GrPrimitiveType type) { fPrimitiveType = type; } void setStartVertex(int startVertex) { fStartVertex = startVertex; } void setStartIndex(int startIndex) { fStartIndex = startIndex; } void setVertexCount(int vertexCount) { fVertexCount = vertexCount; } void setIndexCount(int indexCount) { fIndexCount = indexCount; } void setVerticesPerInstance(int verticesPerI) { fVerticesPerInstance = verticesPerI; } void setIndicesPerInstance(int indicesPerI) { fIndicesPerInstance = indicesPerI; } void setInstanceCount(int instanceCount) { fInstanceCount = instanceCount; } bool isIndexed() const { return fIndexCount > 0; } #ifdef SK_DEBUG bool isInstanced() const; // this version is longer because of asserts #else bool isInstanced() const { return fInstanceCount > 0; } #endif // adds or remove instances void adjustInstanceCount(int instanceOffset); // shifts the start vertex void adjustStartVertex(int vertexOffset); // shifts the start index void adjustStartIndex(int indexOffset); void setDevBounds(const SkRect& bounds) { fDevBoundsStorage = bounds; fDevBounds = &fDevBoundsStorage; } const GrVertexBuffer* vertexBuffer() const { return fVertexBuffer.get(); } const GrIndexBuffer* indexBuffer() const { return fIndexBuffer.get(); } void setVertexBuffer(const GrVertexBuffer* vb) { fVertexBuffer.reset(vb); } void setIndexBuffer(const GrIndexBuffer* ib) { fIndexBuffer.reset(ib); } const SkRect* getDevBounds() const { return fDevBounds; } private: friend class GrDrawTarget; GrPrimitiveType fPrimitiveType; int fStartVertex; int fStartIndex; int fVertexCount; int fIndexCount; int fInstanceCount; int fVerticesPerInstance; int fIndicesPerInstance; SkRect fDevBoundsStorage; SkRect* fDevBounds; GrPendingIOResource fVertexBuffer; GrPendingIOResource fIndexBuffer; }; /** * Used to populate the vertex and index buffer on the draw info before onDraw is called. */ virtual void setDrawBuffers(DrawInfo*, size_t vertexStride) = 0;; bool programUnitTest(int maxStages); protected: friend class GrTargetCommands; // for PipelineInfo enum GeometrySrcType { kNone_GeometrySrcType, //getGeomSrc(); switch (src.fIndexSrc) { case kNone_GeometrySrcType: return 0; case kReserved_GeometrySrcType: return src.fIndexCount; case kBuffer_GeometrySrcType: return static_cast(src.fIndexBuffer->gpuMemorySize() / sizeof(uint16_t)); default: SkFAIL("Unexpected Index Source."); return 0; } } GrContext* getContext() { return fContext; } const GrContext* getContext() const { return fContext; } // subclasses must call this in their destructors to ensure all vertex // and index sources have been released (including those held by // pushGeometrySource()) void releaseGeometry(); // accessors for derived classes const GeometrySrcState& getGeomSrc() const { return fGeoSrcStateStack.back(); } // it is preferable to call this rather than getGeomSrc()->fVertexSize because of the assert. size_t getVertexSize() const { // the vertex layout is only valid if a vertex source has been specified. SkASSERT(this->getGeomSrc().fVertexSrc != kNone_GeometrySrcType); return this->getGeomSrc().fVertexSize; } // Subclass must initialize this in its constructor. SkAutoTUnref fCaps; const GrTraceMarkerSet& getActiveTraceMarkers() { return fActiveTraceMarkers; } // Makes a copy of the dst if it is necessary for the draw. Returns false if a copy is required // but couldn't be made. Otherwise, returns true. This method needs to be protected because it // needs to be accessed by GLPrograms to setup a correct drawstate bool setupDstReadIfNecessary(const GrPipelineBuilder&, const GrProcOptInfo& colorPOI, const GrProcOptInfo& coveragePOI, GrDeviceCoordTexture* dstCopy, const SkRect* drawBounds); struct PipelineInfo { PipelineInfo(GrPipelineBuilder* pipelineBuilder, GrScissorState* scissor, const GrPrimitiveProcessor* primProc, const SkRect* devBounds, GrDrawTarget* target); PipelineInfo(GrPipelineBuilder* pipelineBuilder, GrScissorState* scissor, const GrBatch* batch, const SkRect* devBounds, GrDrawTarget* target); bool willBlendWithDst(const GrPrimitiveProcessor* primProc) const { return fPipelineBuilder->willBlendWithDst(primProc); } private: friend class GrDrawTarget; bool mustSkipDraw() const { return (NULL == fPipelineBuilder); } GrPipelineBuilder* fPipelineBuilder; GrScissorState* fScissor; GrProcOptInfo fColorPOI; GrProcOptInfo fCoveragePOI; GrDeviceCoordTexture fDstCopy; }; void setupPipeline(const PipelineInfo& pipelineInfo, GrPipeline* pipeline); // A subclass can optionally overload this function to be notified before // vertex and index space is reserved. virtual void willReserveVertexAndIndexSpace(int vertexCount, size_t vertexStride, int indexCount) {} private: /** * This will be called before allocating a texture as a dst for copySurface. This function * populates the dstDesc's config, flags, and origin so as to maximize efficiency and guarantee * success of the copySurface call. */ void initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* dstDesc) { if (!this->onInitCopySurfaceDstDesc(src, dstDesc)) { dstDesc->fOrigin = kDefault_GrSurfaceOrigin; dstDesc->fFlags = kRenderTarget_GrSurfaceFlag; dstDesc->fConfig = src->config(); } } /** Internal implementation of canCopySurface. */ bool internalCanCopySurface(const GrSurface* dst, const GrSurface* src, const SkIRect& clippedSrcRect, const SkIPoint& clippedDstRect); // implemented by subclass to allocate space for reserved geom virtual bool onReserveVertexSpace(size_t vertexSize, int vertexCount, void** vertices) = 0; virtual bool onReserveIndexSpace(int indexCount, void** indices) = 0; // implemented by subclass to handle release of reserved geom space virtual void releaseReservedVertexSpace() = 0; virtual void releaseReservedIndexSpace() = 0; // subclass overrides to be notified just before geo src state is pushed/popped. virtual void geometrySourceWillPush() = 0; virtual void geometrySourceWillPop(const GeometrySrcState& restoredState) = 0; // subclass called to perform drawing virtual void onDraw(const GrGeometryProcessor*, const DrawInfo&, const PipelineInfo&) = 0; virtual void onDrawBatch(GrBatch*, const PipelineInfo&) = 0; // TODO copy in order drawbuffer onDrawRect to here virtual void onDrawRect(GrPipelineBuilder*, GrColor color, const SkMatrix& viewMatrix, const SkRect& rect, const SkRect* localRect, const SkMatrix* localMatrix) = 0; virtual void onStencilPath(const GrPipelineBuilder&, const GrPathProcessor*, const GrPath*, const GrScissorState&, const GrStencilSettings&) = 0; virtual void onDrawPath(const GrPathProcessor*, const GrPath*, const GrStencilSettings&, const PipelineInfo&) = 0; virtual void onDrawPaths(const GrPathProcessor*, const GrPathRange*, const void* indices, PathIndexType, const float transformValues[], PathTransformType, int count, const GrStencilSettings&, const PipelineInfo&) = 0; virtual void onClear(const SkIRect* rect, GrColor color, bool canIgnoreRect, GrRenderTarget* renderTarget) = 0; /** The subclass will get a chance to copy the surface for falling back to the default implementation, which simply draws a rectangle (and fails if dst isn't a render target). It should assume that any clipping has already been performed on the rect and point. It won't be called if the copy can be skipped. */ virtual bool onCopySurface(GrSurface* dst, GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) = 0; /** Indicates whether onCopySurface would succeed. It should assume that any clipping has already been performed on the rect and point. It won't be called if the copy can be skipped. */ virtual bool onCanCopySurface(const GrSurface* dst, const GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) = 0; /** * This will be called before allocating a texture to be a dst for onCopySurface. Only the * dstDesc's config, flags, and origin need be set by the function. If the subclass cannot * create a surface that would succeed its implementation of onCopySurface, it should return * false. The base class will fall back to creating a render target to draw into using the src. */ virtual bool onInitCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* dstDesc) = 0; // helpers for reserving vertex and index space. bool reserveVertexSpace(size_t vertexSize, int vertexCount, void** vertices); bool reserveIndexSpace(int indexCount, void** indices); // called by drawIndexed and drawNonIndexed. Use a negative indexCount to // indicate non-indexed drawing. bool checkDraw(const GrPipelineBuilder&, const GrGeometryProcessor*, GrPrimitiveType type, int startVertex, int startIndex, int vertexCount, int indexCount) const; // called when setting a new vert/idx source to unref prev vb/ib void releasePreviousVertexSource(); void releasePreviousIndexSource(); // Check to see if this set of draw commands has been sent out virtual bool isIssued(uint32_t drawID) { return true; } void getPathStencilSettingsForFilltype(GrPathRendering::FillType, const GrStencilBuffer*, GrStencilSettings*); virtual GrClipMaskManager* clipMaskManager() = 0; virtual bool setupClip(GrPipelineBuilder*, GrPipelineBuilder::AutoRestoreFragmentProcessors*, GrPipelineBuilder::AutoRestoreStencil*, GrScissorState*, const SkRect* devBounds) = 0; enum { kPreallocGeoSrcStateStackCnt = 4, }; SkSTArray fGeoSrcStateStack; // The context owns us, not vice-versa, so this ptr is not ref'ed by DrawTarget. GrContext* fContext; // To keep track that we always have at least as many debug marker adds as removes int fGpuTraceMarkerCount; GrTraceMarkerSet fActiveTraceMarkers; GrTraceMarkerSet fStoredTraceMarkers; typedef SkRefCnt INHERITED; }; /* * This class is JUST for clip mask manager. Everyone else should just use draw target above. */ class GrClipTarget : public GrDrawTarget { public: GrClipTarget(GrContext* context) : INHERITED(context) { fClipMaskManager.setClipTarget(this); } /* Clip mask manager needs access to the context. * TODO we only need a very small subset of context in the CMM. */ GrContext* getContext() { return INHERITED::getContext(); } const GrContext* getContext() const { return INHERITED::getContext(); } /** * Clip Mask Manager(and no one else) needs to clear private stencil bits. * ClipTarget subclass sets clip bit in the stencil buffer. The subclass * is free to clear the remaining bits to zero if masked clears are more * expensive than clearing all bits. */ virtual void clearStencilClip(const SkIRect& rect, bool insideClip, GrRenderTarget* = NULL) = 0; /** * Release any resources that are cached but not currently in use. This * is intended to give an application some recourse when resources are low. */ void purgeResources() override { // The clip mask manager can rebuild all its clip masks so just // get rid of them all. fClipMaskManager.purgeResources(); }; protected: GrClipMaskManager fClipMaskManager; private: GrClipMaskManager* clipMaskManager() override { return &fClipMaskManager; } virtual bool setupClip(GrPipelineBuilder*, GrPipelineBuilder::AutoRestoreFragmentProcessors*, GrPipelineBuilder::AutoRestoreStencil*, GrScissorState* scissorState, const SkRect* devBounds) override; typedef GrDrawTarget INHERITED; }; #endif