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/*
* 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 "GrGpuResourceRef.h"
#include "GrPipeline.h"
#include "GrProcessorSet.h"
#include "GrRenderTarget.h"
#include "GrUserStencilSettings.h"
#include "GrXferProcessor.h"
class GrCaps;
class GrDrawOp;
class GrPaint;
class GrTexture;
class GrPipelineBuilder : private SkNoncopyable {
public:
/**
* Initializes the GrPipelineBuilder based on a GrPaint and MSAA availability. 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.
*/
GrPipelineBuilder(GrPaint&& paint, GrAAType aaType)
: fFlags(GrPipeline::SRGBFlagsFromPaint(paint))
, fUserStencilSettings(&GrUserStencilSettings::kUnused)
, fProcessors(std::move(paint)) {
if (GrAATypeIsHW(aaType)) {
fFlags |= GrPipeline::kHWAntialias_Flag;
}
}
///////////////////////////////////////////////////////////////////////////
/// @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 numColorFragmentProcessors() const { return fProcessors.numColorFragmentProcessors(); }
int numCoverageFragmentProcessors() const {
return fProcessors.numCoverageFragmentProcessors();
}
int numFragmentProcessors() const { return fProcessors.numFragmentProcessors(); }
const GrFragmentProcessor* getColorFragmentProcessor(int idx) const {
return fProcessors.colorFragmentProcessor(idx);
}
const GrFragmentProcessor* getCoverageFragmentProcessor(int idx) const {
return fProcessors.coverageFragmentProcessor(idx);
}
const GrProcessorSet& processors() const { return fProcessors; }
GrProcessorSet::Analysis finalizeProcessors(const GrProcessorAnalysisColor& colorInput,
const GrProcessorAnalysisCoverage coverageInput,
const GrAppliedClip* clip, bool isMixedSamples,
const GrCaps& caps, GrColor* overrideColor) {
return fProcessors.finalize(colorInput, coverageInput, clip, isMixedSamples, caps,
overrideColor);
}
/// @}
///////////////////////////////////////////////////////////////////////////
/// @name Stencil
////
bool hasUserStencilSettings() const { return !fUserStencilSettings->isUnused(); }
/**
* Sets the user stencil settings for the next draw.
* This class only stores pointers to stencil settings objects.
* The caller guarantees the pointer will remain valid until it
* changes or goes out of scope.
* @param settings the stencil settings to use.
*/
void setUserStencil(const GrUserStencilSettings* settings) { fUserStencilSettings = settings; }
/// @}
///////////////////////////////////////////////////////////////////////////
/// @name State Flags
////
bool isHWAntialias() const { return SkToBool(fFlags & GrPipeline::kHWAntialias_Flag); }
void setSnapVerticesToPixelCenters(bool enable) {
if (enable) {
fFlags |= GrPipeline::kSnapVerticesToPixelCenters_Flag;
} else {
fFlags &= ~GrPipeline::kSnapVerticesToPixelCenters_Flag;
}
}
/// @}
void getPipelineInitArgs(GrPipeline::InitArgs* args) const {
args->fFlags = fFlags;
args->fUserStencil = fUserStencilSettings;
args->fProcessors = &fProcessors;
}
private:
uint32_t fFlags;
const GrUserStencilSettings* fUserStencilSettings;
GrProcessorSet fProcessors;
};
#endif
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