| /* |
| * 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 "GrClipData.h" |
| #include "GrClipMaskManager.h" |
| #include "GrContext.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 GrClipData; |
| class GrDrawTargetCaps; |
| class GrPath; |
| class GrPathRange; |
| |
| 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(); } |
| |
| /** |
| * Sets the current clip to the region specified by clip. All draws will be |
| * clipped against this clip if kClip_StateBit is enabled. |
| * |
| * Setting the clip may (or may not) zero out the client's stencil bits. |
| * |
| * @param description of the clipping region |
| */ |
| void setClip(const GrClipData* clip); |
| |
| /** |
| * Gets the current clip. |
| * |
| * @return the clip. |
| */ |
| const GrClipData* getClip() const; |
| |
| /** |
| * 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) { |
| AutoGeometryPush agp(this); |
| 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<SkPoint*>(this->vertices()); |
| } |
| |
| private: |
| void reset(); |
| |
| GrDrawTarget* fTarget; |
| void* fVertices; |
| void* fIndices; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| class AutoClipRestore : public ::SkNoncopyable { |
| public: |
| AutoClipRestore(GrDrawTarget* target) { |
| fTarget = target; |
| fClip = fTarget->getClip(); |
| } |
| |
| AutoClipRestore(GrDrawTarget* target, const SkIRect& newClip); |
| |
| ~AutoClipRestore() { |
| fTarget->setClip(fClip); |
| } |
| private: |
| GrDrawTarget* fTarget; |
| const GrClipData* fClip; |
| SkTLazy<SkClipStack> fStack; |
| GrClipData fReplacementClip; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * 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<const GrVertexBuffer, kRead_GrIOType> fVertexBuffer; |
| GrPendingIOResource<const GrIndexBuffer, kRead_GrIOType> 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: |
| enum GeometrySrcType { |
| kNone_GeometrySrcType, //<! src has not been specified |
| kReserved_GeometrySrcType, //<! src was set using reserve*Space |
| kBuffer_GeometrySrcType //<! src was set using set*SourceToBuffer |
| }; |
| |
| struct GeometrySrcState { |
| GeometrySrcType fVertexSrc; |
| union { |
| // valid if src type is buffer |
| const GrVertexBuffer* fVertexBuffer; |
| // valid if src type is reserved or array |
| int fVertexCount; |
| }; |
| |
| GeometrySrcType fIndexSrc; |
| union { |
| // valid if src type is buffer |
| const GrIndexBuffer* fIndexBuffer; |
| // valid if src type is reserved or array |
| int fIndexCount; |
| }; |
| |
| size_t fVertexSize; |
| }; |
| |
| int indexCountInCurrentSource() const { |
| const GeometrySrcState& src = this->getGeomSrc(); |
| switch (src.fIndexSrc) { |
| case kNone_GeometrySrcType: |
| return 0; |
| case kReserved_GeometrySrcType: |
| return src.fIndexCount; |
| case kBuffer_GeometrySrcType: |
| return static_cast<int>(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<const GrDrawTargetCaps> 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(GrPipelineBuilder*, |
| GrDeviceCoordTexture* dstCopy, |
| const SkRect* drawBounds); |
| |
| 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 | kNoStencil_GrSurfaceFlag; |
| dstDesc->fConfig = src->config(); |
| } |
| } |
| |
| /** Internal implementation of canCopySurface. */ |
| bool internalCanCopySurface(const GrSurface* dst, |
| const GrSurface* src, |
| const SkIRect& clippedSrcRect, |
| const SkIPoint& clippedDstRect); |
| |
| // 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) {} |
| |
| // 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 GrPipelineBuilder&, |
| const GrGeometryProcessor*, |
| const DrawInfo&, |
| const GrScissorState&, |
| const GrDeviceCoordTexture* dstCopy) = 0; |
| virtual void onDrawBatch(GrBatch*, |
| const GrPipelineBuilder&, |
| const GrScissorState&, |
| const GrDeviceCoordTexture* dstCopy) = 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 GrPipelineBuilder&, |
| const GrPathProcessor*, |
| const GrPath*, |
| const GrScissorState&, |
| const GrStencilSettings&, |
| const GrDeviceCoordTexture* dstCopy) = 0; |
| virtual void onDrawPaths(const GrPipelineBuilder&, |
| const GrPathProcessor*, |
| const GrPathRange*, |
| const void* indices, |
| PathIndexType, |
| const float transformValues[], |
| PathTransformType, |
| int count, |
| const GrScissorState&, |
| const GrStencilSettings&, |
| const GrDeviceCoordTexture*) = 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::AutoRestoreEffects* are, |
| GrPipelineBuilder::AutoRestoreStencil* ars, |
| GrScissorState* scissorState, |
| const SkRect* devBounds) = 0; |
| |
| enum { |
| kPreallocGeoSrcStateStackCnt = 4, |
| }; |
| SkSTArray<kPreallocGeoSrcStateStackCnt, GeometrySrcState, true> fGeoSrcStateStack; |
| const GrClipData* fClip; |
| // 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() SK_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() SK_OVERRIDE { return &fClipMaskManager; } |
| |
| virtual bool setupClip(GrPipelineBuilder*, |
| GrPipelineBuilder::AutoRestoreEffects* are, |
| GrPipelineBuilder::AutoRestoreStencil* ars, |
| GrScissorState* scissorState, |
| const SkRect* devBounds) SK_OVERRIDE; |
| |
| typedef GrDrawTarget INHERITED; |
| }; |
| |
| #endif |
