| /* |
| * 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 GrGLGpu_DEFINED |
| #define GrGLGpu_DEFINED |
| |
| #include "GrGLContext.h" |
| #include "GrGLIRect.h" |
| #include "GrGLIndexBuffer.h" |
| #include "GrGLPathRendering.h" |
| #include "GrGLProgram.h" |
| #include "GrGLRenderTarget.h" |
| #include "GrGLStencilBuffer.h" |
| #include "GrGLTexture.h" |
| #include "GrGLVertexArray.h" |
| #include "GrGLVertexBuffer.h" |
| #include "GrGpu.h" |
| #include "GrPipelineBuilder.h" |
| #include "GrXferProcessor.h" |
| #include "SkTypes.h" |
| |
| class GrPipeline; |
| |
| #ifdef SK_DEVELOPER |
| #define PROGRAM_CACHE_STATS |
| #endif |
| |
| class GrGLGpu : public GrGpu { |
| public: |
| GrGLGpu(const GrGLContext& ctx, GrContext* context); |
| ~GrGLGpu() SK_OVERRIDE; |
| |
| void contextAbandoned() SK_OVERRIDE; |
| |
| const GrGLContext& glContext() const { return fGLContext; } |
| |
| const GrGLInterface* glInterface() const { return fGLContext.interface(); } |
| const GrGLContextInfo& ctxInfo() const { return fGLContext; } |
| GrGLStandard glStandard() const { return fGLContext.standard(); } |
| GrGLVersion glVersion() const { return fGLContext.version(); } |
| GrGLSLGeneration glslGeneration() const { return fGLContext.glslGeneration(); } |
| const GrGLCaps& glCaps() const { return *fGLContext.caps(); } |
| |
| GrGLPathRendering* glPathRendering() { |
| SkASSERT(glCaps().pathRenderingSupport()); |
| return static_cast<GrGLPathRendering*>(pathRendering()); |
| } |
| |
| void discard(GrRenderTarget*) SK_OVERRIDE; |
| |
| // Used by GrGLProgram and GrGLPathTexGenProgramEffects to configure OpenGL |
| // state. |
| void bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture); |
| |
| // GrGpu overrides |
| GrPixelConfig preferredReadPixelsConfig(GrPixelConfig readConfig, |
| GrPixelConfig surfaceConfig) const SK_OVERRIDE; |
| GrPixelConfig preferredWritePixelsConfig(GrPixelConfig writeConfig, |
| GrPixelConfig surfaceConfig) const SK_OVERRIDE; |
| bool canWriteTexturePixels(const GrTexture*, GrPixelConfig srcConfig) const SK_OVERRIDE; |
| bool readPixelsWillPayForYFlip(GrRenderTarget* renderTarget, |
| int left, int top, |
| int width, int height, |
| GrPixelConfig config, |
| size_t rowBytes) const SK_OVERRIDE; |
| bool fullReadPixelsIsFasterThanPartial() const SK_OVERRIDE; |
| |
| bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) SK_OVERRIDE; |
| |
| // These functions should be used to bind GL objects. They track the GL state and skip redundant |
| // bindings. Making the equivalent glBind calls directly will confuse the state tracking. |
| void bindVertexArray(GrGLuint id) { |
| fHWGeometryState.setVertexArrayID(this, id); |
| } |
| void bindIndexBufferAndDefaultVertexArray(GrGLuint id) { |
| fHWGeometryState.setIndexBufferIDOnDefaultVertexArray(this, id); |
| } |
| void bindVertexBuffer(GrGLuint id) { |
| fHWGeometryState.setVertexBufferID(this, id); |
| } |
| |
| // These callbacks update state tracking when GL objects are deleted. They are called from |
| // GrGLResource onRelease functions. |
| void notifyVertexArrayDelete(GrGLuint id) { |
| fHWGeometryState.notifyVertexArrayDelete(id); |
| } |
| void notifyVertexBufferDelete(GrGLuint id) { |
| fHWGeometryState.notifyVertexBufferDelete(id); |
| } |
| void notifyIndexBufferDelete(GrGLuint id) { |
| fHWGeometryState.notifyIndexBufferDelete(id); |
| } |
| |
| bool copySurface(GrSurface* dst, |
| GrSurface* src, |
| const SkIRect& srcRect, |
| const SkIPoint& dstPoint) SK_OVERRIDE; |
| |
| bool canCopySurface(const GrSurface* dst, |
| const GrSurface* src, |
| const SkIRect& srcRect, |
| const SkIPoint& dstPoint) SK_OVERRIDE; |
| |
| void buildProgramDesc(GrProgramDesc*, |
| const GrPrimitiveProcessor&, |
| const GrPipeline&, |
| const GrProgramDesc::DescInfo&, |
| const GrBatchTracker&) const SK_OVERRIDE; |
| |
| private: |
| // GrGpu overrides |
| void onResetContext(uint32_t resetBits) SK_OVERRIDE; |
| |
| GrTexture* onCreateTexture(const GrSurfaceDesc& desc, bool budgeted, const void* srcData, |
| size_t rowBytes) SK_OVERRIDE; |
| GrTexture* onCreateCompressedTexture(const GrSurfaceDesc& desc, bool budgeted, |
| const void* srcData) SK_OVERRIDE; |
| GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) SK_OVERRIDE; |
| GrIndexBuffer* onCreateIndexBuffer(size_t size, bool dynamic) SK_OVERRIDE; |
| GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&) SK_OVERRIDE; |
| GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&) SK_OVERRIDE; |
| bool createStencilBufferForRenderTarget(GrRenderTarget* rt, bool budgeted, |
| int width, int height) SK_OVERRIDE; |
| bool attachStencilBufferToRenderTarget(GrStencilBuffer* sb, GrRenderTarget* rt) SK_OVERRIDE; |
| |
| void onClear(GrRenderTarget*, const SkIRect* rect, GrColor color, |
| bool canIgnoreRect) SK_OVERRIDE; |
| |
| void onClearStencilClip(GrRenderTarget*, const SkIRect& rect, bool insideClip) SK_OVERRIDE; |
| |
| bool onReadPixels(GrRenderTarget* target, |
| int left, int top, |
| int width, int height, |
| GrPixelConfig, |
| void* buffer, |
| size_t rowBytes) SK_OVERRIDE; |
| |
| bool onWriteTexturePixels(GrTexture* texture, |
| int left, int top, int width, int height, |
| GrPixelConfig config, const void* buffer, |
| size_t rowBytes) SK_OVERRIDE; |
| |
| void onResolveRenderTarget(GrRenderTarget* target) SK_OVERRIDE; |
| |
| void onDraw(const DrawArgs&, const GrDrawTarget::DrawInfo&) SK_OVERRIDE; |
| void onStencilPath(const GrPath*, const StencilPathState&) SK_OVERRIDE; |
| void onDrawPath(const DrawArgs&, const GrPath*, const GrStencilSettings&) SK_OVERRIDE; |
| void onDrawPaths(const DrawArgs&, |
| const GrPathRange*, |
| const void* indices, |
| GrDrawTarget::PathIndexType, |
| const float transformValues[], |
| GrDrawTarget::PathTransformType, |
| int count, |
| const GrStencilSettings&) SK_OVERRIDE; |
| |
| void clearStencil(GrRenderTarget*) SK_OVERRIDE; |
| |
| // GrDrawTarget overrides |
| void didAddGpuTraceMarker() SK_OVERRIDE; |
| void didRemoveGpuTraceMarker() SK_OVERRIDE; |
| |
| // binds texture unit in GL |
| void setTextureUnit(int unitIdx); |
| |
| // Flushes state from GrPipeline to GL. Returns false if the state couldn't be set. |
| // TODO we only have need to know if this is a line draw for flushing AA state on some buggy |
| // hardware. Evaluate if this is really necessary anymore |
| bool flushGLState(const DrawArgs&, bool isLineDraw); |
| |
| // Sets up vertex attribute pointers and strides. On return indexOffsetInBytes gives the offset |
| // an into the index buffer. It does not account for drawInfo.startIndex() but rather the start |
| // index is relative to the returned offset. |
| void setupGeometry(const GrPrimitiveProcessor&, |
| const GrDrawTarget::DrawInfo& info, |
| size_t* indexOffsetInBytes); |
| |
| // Subclasses should call this to flush the blend state. |
| void flushBlend(const GrXferProcessor::BlendInfo& blendInfo); |
| |
| bool hasExtension(const char* ext) const { return fGLContext.hasExtension(ext); } |
| |
| static bool BlendCoeffReferencesConstant(GrBlendCoeff coeff); |
| |
| class ProgramCache : public ::SkNoncopyable { |
| public: |
| ProgramCache(GrGLGpu* gpu); |
| ~ProgramCache(); |
| |
| void abandon(); |
| GrGLProgram* getProgram(const DrawArgs&); |
| |
| private: |
| enum { |
| // We may actually have kMaxEntries+1 shaders in the GL context because we create a new |
| // shader before evicting from the cache. |
| kMaxEntries = 128, |
| kHashBits = 6, |
| }; |
| |
| struct Entry; |
| |
| struct ProgDescLess; |
| |
| // binary search for entry matching desc. returns index into fEntries that matches desc or ~ |
| // of the index of where it should be inserted. |
| int search(const GrProgramDesc& desc) const; |
| |
| // sorted array of all the entries |
| Entry* fEntries[kMaxEntries]; |
| // hash table based on lowest kHashBits bits of the program key. Used to avoid binary |
| // searching fEntries. |
| Entry* fHashTable[1 << kHashBits]; |
| |
| int fCount; |
| unsigned int fCurrLRUStamp; |
| GrGLGpu* fGpu; |
| #ifdef PROGRAM_CACHE_STATS |
| int fTotalRequests; |
| int fCacheMisses; |
| int fHashMisses; // cache hit but hash table missed |
| #endif |
| }; |
| |
| void flushDither(bool dither); |
| void flushColorWrite(bool writeColor); |
| void flushDrawFace(GrPipelineBuilder::DrawFace face); |
| |
| // flushes the scissor. see the note on flushBoundTextureAndParams about |
| // flushing the scissor after that function is called. |
| void flushScissor(const GrScissorState&, |
| const GrGLIRect& rtViewport, |
| GrSurfaceOrigin rtOrigin); |
| |
| // disables the scissor |
| void disableScissor(); |
| |
| void initFSAASupport(); |
| |
| // determines valid stencil formats |
| void initStencilFormats(); |
| |
| // sets a texture unit to use for texture operations other than binding a texture to a program. |
| // ensures that such operations don't negatively interact with tracking bound textures. |
| void setScratchTextureUnit(); |
| |
| // bounds is region that may be modified and therefore has to be resolved. |
| // NULL means whole target. Can be an empty rect. |
| void flushRenderTarget(GrGLRenderTarget*, const SkIRect* bounds); |
| |
| void flushStencil(const GrStencilSettings&); |
| void flushHWAAState(GrRenderTarget* rt, bool useHWAA, bool isLineDraw); |
| |
| bool configToGLFormats(GrPixelConfig config, |
| bool getSizedInternal, |
| GrGLenum* internalFormat, |
| GrGLenum* externalFormat, |
| GrGLenum* externalType); |
| // helper for onCreateTexture and writeTexturePixels |
| bool uploadTexData(const GrSurfaceDesc& desc, |
| bool isNewTexture, |
| int left, int top, int width, int height, |
| GrPixelConfig dataConfig, |
| const void* data, |
| size_t rowBytes); |
| |
| // helper for onCreateCompressedTexture. If width and height are |
| // set to -1, then this function will use desc.fWidth and desc.fHeight |
| // for the size of the data. The isNewTexture flag should be set to true |
| // whenever a new texture needs to be created. Otherwise, we assume that |
| // the texture is already in GPU memory and that it's going to be updated |
| // with new data. |
| bool uploadCompressedTexData(const GrSurfaceDesc& desc, |
| const void* data, |
| bool isNewTexture = true, |
| int left = 0, int top = 0, |
| int width = -1, int height = -1); |
| |
| bool createRenderTargetObjects(const GrSurfaceDesc&, bool budgeted, GrGLuint texID, |
| GrGLRenderTarget::IDDesc*); |
| |
| GrGLuint bindSurfaceAsFBO(GrSurface* surface, GrGLenum fboTarget, GrGLIRect* viewport); |
| |
| GrGLContext fGLContext; |
| |
| // GL program-related state |
| ProgramCache* fProgramCache; |
| SkAutoTUnref<GrGLProgram> fCurrentProgram; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| ///@name Caching of GL State |
| ///@{ |
| int fHWActiveTextureUnitIdx; |
| GrGLuint fHWProgramID; |
| |
| enum TriState { |
| kNo_TriState, |
| kYes_TriState, |
| kUnknown_TriState |
| }; |
| |
| // last scissor / viewport scissor state seen by the GL. |
| struct { |
| TriState fEnabled; |
| GrGLIRect fRect; |
| void invalidate() { |
| fEnabled = kUnknown_TriState; |
| fRect.invalidate(); |
| } |
| } fHWScissorSettings; |
| |
| GrGLIRect fHWViewport; |
| |
| /** |
| * Tracks bound vertex and index buffers and vertex attrib array state. |
| */ |
| class HWGeometryState { |
| public: |
| HWGeometryState() { fVBOVertexArray = NULL; this->invalidate(); } |
| |
| ~HWGeometryState() { SkSafeUnref(fVBOVertexArray); } |
| |
| void invalidate() { |
| fBoundVertexArrayIDIsValid = false; |
| fBoundVertexBufferIDIsValid = false; |
| fDefaultVertexArrayBoundIndexBufferID = false; |
| fDefaultVertexArrayBoundIndexBufferIDIsValid = false; |
| fDefaultVertexArrayAttribState.invalidate(); |
| if (fVBOVertexArray) { |
| fVBOVertexArray->invalidateCachedState(); |
| } |
| } |
| |
| void notifyVertexArrayDelete(GrGLuint id) { |
| if (fBoundVertexArrayIDIsValid && fBoundVertexArrayID == id) { |
| // Does implicit bind to 0 |
| fBoundVertexArrayID = 0; |
| } |
| } |
| |
| void setVertexArrayID(GrGLGpu* gpu, GrGLuint arrayID) { |
| if (!gpu->glCaps().vertexArrayObjectSupport()) { |
| SkASSERT(0 == arrayID); |
| return; |
| } |
| if (!fBoundVertexArrayIDIsValid || arrayID != fBoundVertexArrayID) { |
| GR_GL_CALL(gpu->glInterface(), BindVertexArray(arrayID)); |
| fBoundVertexArrayIDIsValid = true; |
| fBoundVertexArrayID = arrayID; |
| } |
| } |
| |
| void notifyVertexBufferDelete(GrGLuint id) { |
| if (fBoundVertexBufferIDIsValid && id == fBoundVertexBufferID) { |
| fBoundVertexBufferID = 0; |
| } |
| if (fVBOVertexArray) { |
| fVBOVertexArray->notifyVertexBufferDelete(id); |
| } |
| fDefaultVertexArrayAttribState.notifyVertexBufferDelete(id); |
| } |
| |
| void notifyIndexBufferDelete(GrGLuint id) { |
| if (fDefaultVertexArrayBoundIndexBufferIDIsValid && |
| id == fDefaultVertexArrayBoundIndexBufferID) { |
| fDefaultVertexArrayBoundIndexBufferID = 0; |
| } |
| if (fVBOVertexArray) { |
| fVBOVertexArray->notifyIndexBufferDelete(id); |
| } |
| } |
| |
| void setVertexBufferID(GrGLGpu* gpu, GrGLuint id) { |
| if (!fBoundVertexBufferIDIsValid || id != fBoundVertexBufferID) { |
| GR_GL_CALL(gpu->glInterface(), BindBuffer(GR_GL_ARRAY_BUFFER, id)); |
| fBoundVertexBufferIDIsValid = true; |
| fBoundVertexBufferID = id; |
| } |
| } |
| |
| /** |
| * Binds the default vertex array and binds the index buffer. This is used when binding |
| * an index buffer in order to update it. |
| */ |
| void setIndexBufferIDOnDefaultVertexArray(GrGLGpu* gpu, GrGLuint id) { |
| this->setVertexArrayID(gpu, 0); |
| if (!fDefaultVertexArrayBoundIndexBufferIDIsValid || |
| id != fDefaultVertexArrayBoundIndexBufferID) { |
| GR_GL_CALL(gpu->glInterface(), BindBuffer(GR_GL_ELEMENT_ARRAY_BUFFER, id)); |
| fDefaultVertexArrayBoundIndexBufferIDIsValid = true; |
| fDefaultVertexArrayBoundIndexBufferID = id; |
| } |
| } |
| |
| /** |
| * Binds the vertex array object that should be used to render from the vertex buffer. |
| * The vertex array is bound and its attrib array state object is returned. The vertex |
| * buffer is bound. The index buffer (if non-NULL) is bound to the vertex array. The |
| * returned GrGLAttribArrayState should be used to set vertex attribute arrays. |
| */ |
| GrGLAttribArrayState* bindArrayAndBuffersToDraw(GrGLGpu* gpu, |
| const GrGLVertexBuffer* vbuffer, |
| const GrGLIndexBuffer* ibuffer); |
| |
| private: |
| GrGLuint fBoundVertexArrayID; |
| GrGLuint fBoundVertexBufferID; |
| bool fBoundVertexArrayIDIsValid; |
| bool fBoundVertexBufferIDIsValid; |
| |
| GrGLuint fDefaultVertexArrayBoundIndexBufferID; |
| bool fDefaultVertexArrayBoundIndexBufferIDIsValid; |
| // We return a non-const pointer to this from bindArrayAndBuffersToDraw when vertex array 0 |
| // is bound. However, this class is internal to GrGLGpu and this object never leaks out of |
| // GrGLGpu. |
| GrGLAttribArrayState fDefaultVertexArrayAttribState; |
| |
| // This is used when we're using a core profile and the vertices are in a VBO. |
| GrGLVertexArray* fVBOVertexArray; |
| } fHWGeometryState; |
| |
| struct { |
| GrBlendCoeff fSrcCoeff; |
| GrBlendCoeff fDstCoeff; |
| GrColor fConstColor; |
| bool fConstColorValid; |
| TriState fEnabled; |
| |
| void invalidate() { |
| fSrcCoeff = kInvalid_GrBlendCoeff; |
| fDstCoeff = kInvalid_GrBlendCoeff; |
| fConstColorValid = false; |
| fEnabled = kUnknown_TriState; |
| } |
| } fHWBlendState; |
| |
| TriState fMSAAEnabled; |
| |
| GrStencilSettings fHWStencilSettings; |
| TriState fHWStencilTestEnabled; |
| |
| |
| GrPipelineBuilder::DrawFace fHWDrawFace; |
| TriState fHWWriteToColor; |
| TriState fHWDitherEnabled; |
| uint32_t fHWBoundRenderTargetUniqueID; |
| SkTArray<uint32_t, true> fHWBoundTextureUniqueIDs; |
| |
| ///@} |
| |
| // we record what stencil format worked last time to hopefully exit early |
| // from our loop that tries stencil formats and calls check fb status. |
| int fLastSuccessfulStencilFmtIdx; |
| |
| typedef GrGpu INHERITED; |
| friend class GrGLPathRendering; // For accessing setTextureUnit. |
| }; |
| |
| #endif |
