| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrPipelineBuilder_DEFINED |
| #define GrPipelineBuilder_DEFINED |
| |
| #include "GrBlend.h" |
| #include "GrCaps.h" |
| #include "GrClip.h" |
| #include "GrGpuResourceRef.h" |
| #include "GrFragmentStage.h" |
| #include "GrProcOptInfo.h" |
| #include "GrRenderTarget.h" |
| #include "GrStencil.h" |
| #include "GrXferProcessor.h" |
| #include "SkMatrix.h" |
| #include "effects/GrCoverageSetOpXP.h" |
| #include "effects/GrDisableColorXP.h" |
| #include "effects/GrPorterDuffXferProcessor.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| |
| class GrBatch; |
| class GrCaps; |
| class GrPaint; |
| class GrTexture; |
| |
| class GrPipelineBuilder { |
| public: |
| GrPipelineBuilder(); |
| |
| GrPipelineBuilder(const GrPipelineBuilder& pipelineBuilder) { |
| SkDEBUGCODE(fBlockEffectRemovalCnt = 0;) |
| *this = pipelineBuilder; |
| } |
| |
| virtual ~GrPipelineBuilder(); |
| |
| /** |
| * Initializes the GrPipelineBuilder based on a GrPaint, view matrix and render target. Note |
| * that GrPipelineBuilder encompasses more than GrPaint. Aspects of GrPipelineBuilder that have |
| * no GrPaint equivalents are set to default values with the exception of vertex attribute state |
| * which is unmodified by this function and clipping which will be enabled. |
| */ |
| void setFromPaint(const GrPaint&, GrRenderTarget*, const GrClip&); |
| |
| /////////////////////////////////////////////////////////////////////////// |
| /// @name Fragment Processors |
| /// |
| /// GrFragmentProcessors are used to compute per-pixel color and per-pixel fractional coverage. |
| /// There are two chains of FPs, one for color and one for coverage. The first FP in each |
| /// chain gets the initial color/coverage from the GrPrimitiveProcessor. It computes an output |
| /// color/coverage which is fed to the next FP in the chain. The last color and coverage FPs |
| /// feed their output to the GrXferProcessor which controls blending. |
| //// |
| |
| int numColorFragmentStages() const { return fColorStages.count(); } |
| int numCoverageFragmentStages() const { return fCoverageStages.count(); } |
| int numFragmentStages() const { return this->numColorFragmentStages() + |
| this->numCoverageFragmentStages(); } |
| |
| const GrFragmentStage& getColorFragmentStage(int idx) const { return fColorStages[idx]; } |
| const GrFragmentStage& getCoverageFragmentStage(int idx) const { return fCoverageStages[idx]; } |
| |
| const GrFragmentProcessor* addColorProcessor(const GrFragmentProcessor* effect) { |
| SkASSERT(effect); |
| SkNEW_APPEND_TO_TARRAY(&fColorStages, GrFragmentStage, (effect)); |
| fColorProcInfoValid = false; |
| return effect; |
| } |
| |
| const GrFragmentProcessor* addCoverageProcessor(const GrFragmentProcessor* effect) { |
| SkASSERT(effect); |
| SkNEW_APPEND_TO_TARRAY(&fCoverageStages, GrFragmentStage, (effect)); |
| fCoverageProcInfoValid = false; |
| return effect; |
| } |
| |
| /** |
| * Creates a GrSimpleTextureEffect that uses local coords as texture coordinates. |
| */ |
| void addColorTextureProcessor(GrTexture* texture, const SkMatrix& matrix) { |
| this->addColorProcessor(GrSimpleTextureEffect::Create(texture, matrix))->unref(); |
| } |
| |
| void addCoverageTextureProcessor(GrTexture* texture, const SkMatrix& matrix) { |
| this->addCoverageProcessor(GrSimpleTextureEffect::Create(texture, matrix))->unref(); |
| } |
| |
| void addColorTextureProcessor(GrTexture* texture, |
| const SkMatrix& matrix, |
| const GrTextureParams& params) { |
| this->addColorProcessor(GrSimpleTextureEffect::Create(texture, matrix, params))->unref(); |
| } |
| |
| void addCoverageTextureProcessor(GrTexture* texture, |
| const SkMatrix& matrix, |
| const GrTextureParams& params) { |
| this->addCoverageProcessor(GrSimpleTextureEffect::Create(texture, matrix, params))->unref(); |
| } |
| |
| /** |
| * When this object is destroyed it will remove any color/coverage FPs from the pipeline builder |
| * that were added after its constructor. |
| */ |
| class AutoRestoreFragmentProcessors : public ::SkNoncopyable { |
| public: |
| AutoRestoreFragmentProcessors() |
| : fPipelineBuilder(NULL) |
| , fColorEffectCnt(0) |
| , fCoverageEffectCnt(0) {} |
| |
| AutoRestoreFragmentProcessors(GrPipelineBuilder* ds) |
| : fPipelineBuilder(NULL) |
| , fColorEffectCnt(0) |
| , fCoverageEffectCnt(0) { |
| this->set(ds); |
| } |
| |
| ~AutoRestoreFragmentProcessors() { this->set(NULL); } |
| |
| void set(GrPipelineBuilder* ds); |
| |
| bool isSet() const { return SkToBool(fPipelineBuilder); } |
| |
| private: |
| GrPipelineBuilder* fPipelineBuilder; |
| int fColorEffectCnt; |
| int fCoverageEffectCnt; |
| }; |
| |
| /// @} |
| |
| /////////////////////////////////////////////////////////////////////////// |
| /// @name Blending |
| //// |
| |
| /** |
| * This function returns true if the render target destination pixel values will be read for |
| * blending during draw. |
| */ |
| bool willBlendWithDst(const GrPrimitiveProcessor*) const; |
| |
| /** |
| * Installs a GrXPFactory. This object controls how src color, fractional pixel coverage, |
| * and the dst color are blended. |
| */ |
| const GrXPFactory* setXPFactory(const GrXPFactory* xpFactory) { |
| fXPFactory.reset(SkRef(xpFactory)); |
| return xpFactory; |
| } |
| |
| /** |
| * Sets a GrXPFactory that will ignore src color and perform a set operation between the draws |
| * output coverage and the destination. This is useful to render coverage masks as CSG. |
| */ |
| void setCoverageSetOpXPFactory(SkRegion::Op regionOp, bool invertCoverage = false) { |
| fXPFactory.reset(GrCoverageSetOpXPFactory::Create(regionOp, invertCoverage)); |
| } |
| |
| /** |
| * Sets a GrXPFactory that disables color writes to the destination. This is useful when |
| * rendering to the stencil buffer. |
| */ |
| void setDisableColorXPFactory() { |
| fXPFactory.reset(GrDisableColorXPFactory::Create()); |
| } |
| |
| const GrXPFactory* getXPFactory() const { |
| if (!fXPFactory) { |
| fXPFactory.reset(GrPorterDuffXPFactory::Create(SkXfermode::kSrc_Mode)); |
| } |
| return fXPFactory.get(); |
| } |
| |
| /** |
| * Checks whether the xp will need destination in a texture to correctly blend. |
| */ |
| bool willXPNeedDstTexture(const GrCaps& caps, const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI) const; |
| |
| /// @} |
| |
| |
| /////////////////////////////////////////////////////////////////////////// |
| /// @name Render Target |
| //// |
| |
| /** |
| * Retrieves the currently set render-target. |
| * |
| * @return The currently set render target. |
| */ |
| GrRenderTarget* getRenderTarget() const { return fRenderTarget.get(); } |
| |
| /** |
| * Sets the render-target used at the next drawing call |
| * |
| * @param target The render target to set. |
| */ |
| void setRenderTarget(GrRenderTarget* target) { fRenderTarget.reset(SkSafeRef(target)); } |
| |
| /// @} |
| |
| /////////////////////////////////////////////////////////////////////////// |
| /// @name Stencil |
| //// |
| |
| const GrStencilSettings& getStencil() const { return fStencilSettings; } |
| |
| /** |
| * Sets the stencil settings to use for the next draw. |
| * Changing the clip has the side-effect of possibly zeroing |
| * out the client settable stencil bits. So multipass algorithms |
| * using stencil should not change the clip between passes. |
| * @param settings the stencil settings to use. |
| */ |
| void setStencil(const GrStencilSettings& settings) { fStencilSettings = settings; } |
| |
| /** |
| * Shortcut to disable stencil testing and ops. |
| */ |
| void disableStencil() { fStencilSettings.setDisabled(); } |
| |
| GrStencilSettings* stencil() { return &fStencilSettings; } |
| |
| /** |
| * AutoRestoreStencil |
| * |
| * This simple struct saves and restores the stencil settings |
| */ |
| class AutoRestoreStencil : public ::SkNoncopyable { |
| public: |
| AutoRestoreStencil() : fPipelineBuilder(NULL) {} |
| |
| AutoRestoreStencil(GrPipelineBuilder* ds) : fPipelineBuilder(NULL) { this->set(ds); } |
| |
| ~AutoRestoreStencil() { this->set(NULL); } |
| |
| void set(GrPipelineBuilder* ds) { |
| if (fPipelineBuilder) { |
| fPipelineBuilder->setStencil(fStencilSettings); |
| } |
| fPipelineBuilder = ds; |
| if (ds) { |
| fStencilSettings = ds->getStencil(); |
| } |
| } |
| |
| bool isSet() const { return SkToBool(fPipelineBuilder); } |
| |
| private: |
| GrPipelineBuilder* fPipelineBuilder; |
| GrStencilSettings fStencilSettings; |
| }; |
| |
| |
| /// @} |
| |
| /////////////////////////////////////////////////////////////////////////// |
| /// @name State Flags |
| //// |
| |
| /** |
| * Flags that affect rendering. Controlled using enable/disableState(). All |
| * default to disabled. |
| */ |
| enum Flags { |
| /** |
| * Perform dithering. TODO: Re-evaluate whether we need this bit |
| */ |
| kDither_Flag = 0x01, |
| /** |
| * Perform HW anti-aliasing. This means either HW FSAA, if supported by the render target, |
| * or smooth-line rendering if a line primitive is drawn and line smoothing is supported by |
| * the 3D API. |
| */ |
| kHWAntialias_Flag = 0x02, |
| |
| /** |
| * Modifies the vertex shader so that vertices will be positioned at pixel centers. |
| */ |
| kSnapVerticesToPixelCenters_Flag = 0x04, |
| |
| kLast_Flag = kSnapVerticesToPixelCenters_Flag, |
| }; |
| |
| bool isDither() const { return SkToBool(fFlags & kDither_Flag); } |
| bool isHWAntialias() const { return SkToBool(fFlags & kHWAntialias_Flag); } |
| bool snapVerticesToPixelCenters() const { |
| return SkToBool(fFlags & kSnapVerticesToPixelCenters_Flag); } |
| |
| /** |
| * Enable render state settings. |
| * |
| * @param flags bitfield of Flags specifying the states to enable |
| */ |
| void enableState(uint32_t flags) { fFlags |= flags; } |
| |
| /** |
| * Disable render state settings. |
| * |
| * @param flags bitfield of Flags specifying the states to disable |
| */ |
| void disableState(uint32_t flags) { fFlags &= ~(flags); } |
| |
| /** |
| * Enable or disable flags based on a boolean. |
| * |
| * @param flags bitfield of Flags to enable or disable |
| * @param enable if true enable stateBits, otherwise disable |
| */ |
| void setState(uint32_t flags, bool enable) { |
| if (enable) { |
| this->enableState(flags); |
| } else { |
| this->disableState(flags); |
| } |
| } |
| |
| /// @} |
| |
| /////////////////////////////////////////////////////////////////////////// |
| /// @name Face Culling |
| //// |
| |
| enum DrawFace { |
| kInvalid_DrawFace = -1, |
| |
| kBoth_DrawFace, |
| kCCW_DrawFace, |
| kCW_DrawFace, |
| }; |
| |
| /** |
| * Gets whether the target is drawing clockwise, counterclockwise, |
| * or both faces. |
| * @return the current draw face(s). |
| */ |
| DrawFace getDrawFace() const { return fDrawFace; } |
| |
| /** |
| * Controls whether clockwise, counterclockwise, or both faces are drawn. |
| * @param face the face(s) to draw. |
| */ |
| void setDrawFace(DrawFace face) { |
| SkASSERT(kInvalid_DrawFace != face); |
| fDrawFace = face; |
| } |
| |
| /// @} |
| |
| /////////////////////////////////////////////////////////////////////////// |
| |
| GrPipelineBuilder& operator=(const GrPipelineBuilder& that); |
| |
| // TODO delete when we have Batch |
| const GrProcOptInfo& colorProcInfo(const GrPrimitiveProcessor* pp) const { |
| this->calcColorInvariantOutput(pp); |
| return fColorProcInfo; |
| } |
| |
| const GrProcOptInfo& coverageProcInfo(const GrPrimitiveProcessor* pp) const { |
| this->calcCoverageInvariantOutput(pp); |
| return fCoverageProcInfo; |
| } |
| |
| const GrProcOptInfo& colorProcInfo(const GrBatch* batch) const { |
| this->calcColorInvariantOutput(batch); |
| return fColorProcInfo; |
| } |
| |
| const GrProcOptInfo& coverageProcInfo(const GrBatch* batch) const { |
| this->calcCoverageInvariantOutput(batch); |
| return fCoverageProcInfo; |
| } |
| |
| void setClip(const GrClip& clip) { fClip = clip; } |
| const GrClip& clip() const { return fClip; } |
| |
| private: |
| // Calculating invariant color / coverage information is expensive, so we partially cache the |
| // results. |
| // |
| // canUseFracCoveragePrimProc() - Called in regular skia draw, caches results but only for a |
| // specific color and coverage. May be called multiple times |
| // willBlendWithDst() - only called by Nvpr, does not cache results |
| // GrOptDrawState constructor - never caches results |
| |
| /** |
| * Primproc variants of the calc functions |
| * TODO remove these when batch is everywhere |
| */ |
| void calcColorInvariantOutput(const GrPrimitiveProcessor*) const; |
| void calcCoverageInvariantOutput(const GrPrimitiveProcessor*) const; |
| |
| /** |
| * GrBatch provides the initial seed for these loops based off of its initial geometry data |
| */ |
| void calcColorInvariantOutput(const GrBatch*) const; |
| void calcCoverageInvariantOutput(const GrBatch*) const; |
| |
| /** |
| * If fColorProcInfoValid is false, function calculates the invariant output for the color |
| * processors and results are stored in fColorProcInfo. |
| */ |
| void calcColorInvariantOutput(GrColor) const; |
| |
| /** |
| * If fCoverageProcInfoValid is false, function calculates the invariant output for the coverage |
| * processors and results are stored in fCoverageProcInfo. |
| */ |
| void calcCoverageInvariantOutput(GrColor) const; |
| |
| // Some of the auto restore objects assume that no effects are removed during their lifetime. |
| // This is used to assert that this condition holds. |
| SkDEBUGCODE(int fBlockEffectRemovalCnt;) |
| |
| typedef SkSTArray<4, GrFragmentStage> FragmentStageArray; |
| |
| SkAutoTUnref<GrRenderTarget> fRenderTarget; |
| uint32_t fFlags; |
| GrStencilSettings fStencilSettings; |
| DrawFace fDrawFace; |
| mutable SkAutoTUnref<const GrXPFactory> fXPFactory; |
| FragmentStageArray fColorStages; |
| FragmentStageArray fCoverageStages; |
| GrClip fClip; |
| |
| mutable GrProcOptInfo fColorProcInfo; |
| mutable GrProcOptInfo fCoverageProcInfo; |
| mutable bool fColorProcInfoValid; |
| mutable bool fCoverageProcInfoValid; |
| mutable GrColor fColorCache; |
| mutable GrColor fCoverageCache; |
| |
| friend class GrPipeline; |
| }; |
| |
| #endif |