| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrOpsRenderPass_DEFINED |
| #define GrOpsRenderPass_DEFINED |
| |
| #include "include/core/SkDrawable.h" |
| #include "src/gpu/GrPipeline.h" |
| #include "src/gpu/ops/GrDrawOp.h" |
| |
| class GrOpFlushState; |
| class GrGpu; |
| class GrPipeline; |
| class GrGeometryProcessor; |
| class GrProgramInfo; |
| class GrRenderTarget; |
| class GrScissorState; |
| class GrSemaphore; |
| struct SkIRect; |
| struct SkRect; |
| |
| /** |
| * The GrOpsRenderPass is a series of commands (draws, clears, and discards), which all target the |
| * same render target. It is possible that these commands execute immediately (GL), or get buffered |
| * up for later execution (Vulkan). GrOps execute into a GrOpsRenderPass. |
| */ |
| class GrOpsRenderPass { |
| public: |
| virtual ~GrOpsRenderPass() {} |
| |
| struct LoadAndStoreInfo { |
| GrLoadOp fLoadOp; |
| GrStoreOp fStoreOp; |
| std::array<float, 4> fClearColor; |
| }; |
| |
| // Load-time clears of the stencil buffer are always to 0 so we don't store |
| // an 'fStencilClearValue' |
| struct StencilLoadAndStoreInfo { |
| GrLoadOp fLoadOp; |
| GrStoreOp fStoreOp; |
| }; |
| |
| void begin(); |
| // Signals the end of recording to the GrOpsRenderPass and that it can now be submitted. |
| void end(); |
| |
| // Updates the internal pipeline state for drawing with the provided GrProgramInfo. Enters an |
| // internal "bad" state if the pipeline could not be set. |
| void bindPipeline(const GrProgramInfo&, const SkRect& drawBounds); |
| |
| // The scissor rect is always dynamic state and therefore not stored on GrPipeline. If scissor |
| // test is enabled on the current pipeline, then the client must call setScissorRect() before |
| // drawing. The scissor rect may also be updated between draws without having to bind a new |
| // pipeline. |
| void setScissorRect(const SkIRect&); |
| |
| // Binds textures for the primitive processor and any FP on the GrPipeline. Texture bindings are |
| // dynamic state and therefore not set during bindPipeline(). If the current program uses |
| // textures, then the client must call bindTextures() before drawing. The primitive processor |
| // textures may also be updated between draws by calling bindTextures() again with a different |
| // array for primProcTextures. (On subsequent calls, if the backend is capable of updating the |
| // primitive processor textures independently, then it will automatically skip re-binding |
| // FP textures from GrPipeline.) |
| // |
| // If the current program does not use textures, this is a no-op. |
| void bindTextures(const GrGeometryProcessor&, |
| const GrSurfaceProxy* const geomProcTextures[], |
| const GrPipeline&); |
| |
| void bindBuffers(sk_sp<const GrBuffer> indexBuffer, sk_sp<const GrBuffer> instanceBuffer, |
| sk_sp<const GrBuffer> vertexBuffer, GrPrimitiveRestart = GrPrimitiveRestart::kNo); |
| |
| // The next several draw*() methods issue draws using the current pipeline state. Before |
| // drawing, the caller must configure the pipeline and dynamic state: |
| // |
| // - Call bindPipeline() |
| // - If the scissor test is enabled, call setScissorRect() |
| // - If the current program uses textures, call bindTextures() |
| // - Call bindBuffers() (even if all buffers are null) |
| void draw(int vertexCount, int baseVertex); |
| void drawIndexed(int indexCount, int baseIndex, uint16_t minIndexValue, uint16_t maxIndexValue, |
| int baseVertex); |
| |
| // Requires caps.drawInstancedSupport(). |
| void drawInstanced(int instanceCount, int baseInstance, int vertexCount, int baseVertex); |
| |
| // Requires caps.drawInstancedSupport(). |
| void drawIndexedInstanced(int indexCount, int baseIndex, int instanceCount, int baseInstance, |
| int baseVertex); |
| |
| // Executes multiple draws from an array of GrDrawIndirectCommand in the provided buffer. |
| // |
| // Requires caps.drawInstancedSupport(). |
| // |
| // If caps.nativeDrawIndirectSupport() is unavailable, then 'drawIndirectBuffer' must be a |
| // GrCpuBuffer in order to polyfill. Performance may suffer in this scenario. |
| void drawIndirect(const GrBuffer* drawIndirectBuffer, size_t bufferOffset, int drawCount); |
| |
| // Executes multiple draws from an array of GrDrawIndexedIndirectCommand in the provided buffer. |
| // |
| // Requires caps.drawInstancedSupport(). |
| // |
| // If caps.nativeDrawIndirectSupport() is unavailable, then 'drawIndirectBuffer' must be a |
| // GrCpuBuffer in order to polyfill. Performance may suffer in this scenario. |
| void drawIndexedIndirect(const GrBuffer* drawIndirectBuffer, size_t bufferOffset, |
| int drawCount); |
| |
| // This is a helper method for drawing a repeating pattern of vertices. The bound index buffer |
| // is understood to contain 'maxPatternRepetitionsInIndexBuffer' repetitions of the pattern. |
| // If more repetitions are required, then we loop. |
| void drawIndexPattern(int patternIndexCount, int patternRepeatCount, |
| int maxPatternRepetitionsInIndexBuffer, int patternVertexCount, |
| int baseVertex); |
| |
| // Performs an upload of vertex data in the middle of a set of a set of draws |
| virtual void inlineUpload(GrOpFlushState*, GrDeferredTextureUploadFn&) = 0; |
| |
| /** |
| * Clear the owned render target. Clears the full target if 'scissor' is disabled, otherwise it |
| * is restricted to 'scissor'. Must check caps.performPartialClearsAsDraws() before using an |
| * enabled scissor test; must check caps.performColorClearsAsDraws() before using this at all. |
| */ |
| void clear(const GrScissorState& scissor, std::array<float, 4> color); |
| |
| /** |
| * Same as clear() but modifies the stencil; check caps.performStencilClearsAsDraws() and |
| * caps.performPartialClearsAsDraws(). |
| */ |
| void clearStencilClip(const GrScissorState& scissor, bool insideStencilMask); |
| |
| /** |
| * Executes the SkDrawable object for the underlying backend. |
| */ |
| void executeDrawable(std::unique_ptr<SkDrawable::GpuDrawHandler>); |
| |
| protected: |
| GrOpsRenderPass() : fOrigin(kTopLeft_GrSurfaceOrigin), fRenderTarget(nullptr) {} |
| |
| GrOpsRenderPass(GrRenderTarget* rt, GrSurfaceOrigin origin) |
| : fOrigin(origin) |
| , fRenderTarget(rt) { |
| } |
| |
| void set(GrRenderTarget* rt, GrSurfaceOrigin origin) { |
| SkASSERT(!fRenderTarget); |
| |
| fRenderTarget = rt; |
| fOrigin = origin; |
| } |
| |
| GrSurfaceOrigin fOrigin; |
| GrRenderTarget* fRenderTarget; |
| |
| // Backends may defer binding of certain buffers if their draw API requires a buffer, or if |
| // their bind methods don't support base values. |
| sk_sp<const GrBuffer> fActiveIndexBuffer; |
| sk_sp<const GrBuffer> fActiveVertexBuffer; |
| sk_sp<const GrBuffer> fActiveInstanceBuffer; |
| |
| private: |
| virtual GrGpu* gpu() = 0; |
| |
| void resetActiveBuffers() { |
| fActiveIndexBuffer.reset(); |
| fActiveInstanceBuffer.reset(); |
| fActiveVertexBuffer.reset(); |
| } |
| |
| bool prepareToDraw(); |
| |
| // overridden by backend-specific derived class to perform the rendering command. |
| virtual void onBegin() {} |
| virtual void onEnd() {} |
| virtual bool onBindPipeline(const GrProgramInfo&, const SkRect& drawBounds) = 0; |
| virtual void onSetScissorRect(const SkIRect&) = 0; |
| virtual bool onBindTextures(const GrGeometryProcessor&, |
| const GrSurfaceProxy* const geomProcTextures[], |
| const GrPipeline&) = 0; |
| virtual void onBindBuffers(sk_sp<const GrBuffer> indexBuffer, sk_sp<const GrBuffer> instanceBuffer, |
| sk_sp<const GrBuffer> vertexBuffer, GrPrimitiveRestart) = 0; |
| virtual void onDraw(int vertexCount, int baseVertex) = 0; |
| virtual void onDrawIndexed(int indexCount, int baseIndex, uint16_t minIndexValue, |
| uint16_t maxIndexValue, int baseVertex) = 0; |
| virtual void onDrawInstanced(int instanceCount, int baseInstance, int vertexCount, |
| int baseVertex) = 0; |
| virtual void onDrawIndexedInstanced(int indexCount, int baseIndex, int instanceCount, |
| int baseInstance, int baseVertex) = 0; |
| virtual void onDrawIndirect(const GrBuffer*, size_t offset, int drawCount) { |
| SK_ABORT("Not implemented."); // Only called if caps.nativeDrawIndirectSupport(). |
| } |
| virtual void onDrawIndexedIndirect(const GrBuffer*, size_t offset, int drawCount) { |
| SK_ABORT("Not implemented."); // Only called if caps.nativeDrawIndirectSupport(). |
| } |
| virtual void onClear(const GrScissorState&, std::array<float, 4> color) = 0; |
| virtual void onClearStencilClip(const GrScissorState&, bool insideStencilMask) = 0; |
| virtual void onExecuteDrawable(std::unique_ptr<SkDrawable::GpuDrawHandler>) {} |
| |
| enum class DrawPipelineStatus { |
| kOk = 0, |
| kNotConfigured, |
| kFailedToBind |
| }; |
| |
| DrawPipelineStatus fDrawPipelineStatus = DrawPipelineStatus::kNotConfigured; |
| GrXferBarrierType fXferBarrierType; |
| |
| #ifdef SK_DEBUG |
| enum class DynamicStateStatus { |
| kDisabled, |
| kUninitialized, |
| kConfigured |
| }; |
| |
| DynamicStateStatus fScissorStatus; |
| DynamicStateStatus fTextureBindingStatus; |
| bool fHasIndexBuffer; |
| DynamicStateStatus fInstanceBufferStatus; |
| DynamicStateStatus fVertexBufferStatus; |
| #endif |
| |
| using INHERITED = GrOpsRenderPass; |
| }; |
| |
| #endif |