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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 GrDrawOp_DEFINED
#define GrDrawOp_DEFINED
#include <functional>
#include "GrOp.h"
#include "GrPipeline.h"
/**
* GrDrawOps are flushed in two phases (preDraw, and draw). In preDraw uploads to GrGpuResources
* and draws are determined and scheduled. They are issued in the draw phase. GrDrawOpUploadToken is
* used to sequence the uploads relative to each other and to draws.
**/
class GrDrawOpUploadToken {
public:
static GrDrawOpUploadToken AlreadyFlushedToken() { return GrDrawOpUploadToken(0); }
GrDrawOpUploadToken(const GrDrawOpUploadToken& that) : fSequenceNumber(that.fSequenceNumber) {}
GrDrawOpUploadToken& operator =(const GrDrawOpUploadToken& that) {
fSequenceNumber = that.fSequenceNumber;
return *this;
}
bool operator==(const GrDrawOpUploadToken& that) const {
return fSequenceNumber == that.fSequenceNumber;
}
bool operator!=(const GrDrawOpUploadToken& that) const { return !(*this == that); }
private:
GrDrawOpUploadToken();
explicit GrDrawOpUploadToken(uint64_t sequenceNumber) : fSequenceNumber(sequenceNumber) {}
friend class GrOpFlushState;
uint64_t fSequenceNumber;
};
/**
* Base class for GrOps that draw. These ops have a GrPipeline installed by GrOpList.
*/
class GrDrawOp : public GrOp {
public:
/** Method that performs an upload on behalf of a DeferredUploadFn. */
using WritePixelsFn = std::function<bool(GrSurface* texture,
int left, int top, int width, int height,
GrPixelConfig config, const void* buffer,
size_t rowBytes)>;
/** See comments before GrDrawOp::Target definition on how deferred uploaders work. */
using DeferredUploadFn = std::function<void(WritePixelsFn&)>;
class Target;
GrDrawOp(uint32_t classID);
~GrDrawOp() override;
bool installPipeline(const GrPipeline::CreateArgs&);
/**
* Performs analysis of the fragment processors in GrProcessorSet and GrAppliedClip using the
* initial color and coverage from this op's geometry processor.
*/
void analyzeProcessors(GrProcessorSet::FragmentProcessorAnalysis* analysis,
const GrProcessorSet& processors,
const GrAppliedClip& appliedClip,
const GrCaps& caps) const {
FragmentProcessorAnalysisInputs input;
this->getFragmentProcessorAnalysisInputs(&input);
analysis->reset(*input.colorInput(), *input.coverageInput(), processors,
input.usesPLSDstRead(), appliedClip, caps);
}
protected:
static SkString DumpPipelineInfo(const GrPipeline& pipeline) {
SkString string;
string.appendf("RT: %d\n", pipeline.getRenderTarget()->uniqueID().asUInt());
string.append("ColorStages:\n");
for (int i = 0; i < pipeline.numColorFragmentProcessors(); i++) {
string.appendf("\t\t%s\n\t\t%s\n",
pipeline.getColorFragmentProcessor(i).name(),
pipeline.getColorFragmentProcessor(i).dumpInfo().c_str());
}
string.append("CoverageStages:\n");
for (int i = 0; i < pipeline.numCoverageFragmentProcessors(); i++) {
string.appendf("\t\t%s\n\t\t%s\n",
pipeline.getCoverageFragmentProcessor(i).name(),
pipeline.getCoverageFragmentProcessor(i).dumpInfo().c_str());
}
string.appendf("XP: %s\n", pipeline.getXferProcessor().name());
bool scissorEnabled = pipeline.getScissorState().enabled();
string.appendf("Scissor: ");
if (scissorEnabled) {
string.appendf("[L: %d, T: %d, R: %d, B: %d]\n",
pipeline.getScissorState().rect().fLeft,
pipeline.getScissorState().rect().fTop,
pipeline.getScissorState().rect().fRight,
pipeline.getScissorState().rect().fBottom);
} else {
string.appendf("<disabled>\n");
}
return string;
}
const GrPipeline* pipeline() const {
SkASSERT(fPipelineInstalled);
return reinterpret_cast<const GrPipeline*>(fPipelineStorage.get());
}
/**
* This describes aspects of the GrPrimitiveProcessor produced by a GrDrawOp that are used in
* pipeline analysis.
*/
class FragmentProcessorAnalysisInputs {
public:
FragmentProcessorAnalysisInputs() = default;
GrPipelineInput* colorInput() { return &fColorInput; }
GrPipelineInput* coverageInput() { return &fCoverageInput; }
void setUsesPLSDstRead() { fUsesPLSDstRead = true; }
bool usesPLSDstRead() const { return fUsesPLSDstRead; }
private:
GrPipelineInput fColorInput;
GrPipelineInput fCoverageInput;
bool fUsesPLSDstRead = false;
};
private:
/**
* Provides information about the GrPrimitiveProccesor color and coverage outputs which become
* inputs to the first color and coverage fragment processors.
*/
virtual void getFragmentProcessorAnalysisInputs(FragmentProcessorAnalysisInputs*) const = 0;
/**
* After GrPipeline analysis is complete this is called so that the op can use the analysis
* results when constructing its GrPrimitiveProcessor.
*/
virtual void applyPipelineOptimizations(const GrPipelineOptimizations&) = 0;
protected:
struct QueuedUpload {
QueuedUpload(DeferredUploadFn&& upload, GrDrawOpUploadToken token)
: fUpload(std::move(upload))
, fUploadBeforeToken(token) {}
DeferredUploadFn fUpload;
GrDrawOpUploadToken fUploadBeforeToken;
};
SkTArray<QueuedUpload> fInlineUploads;
private:
SkAlignedSTStorage<1, GrPipeline> fPipelineStorage;
bool fPipelineInstalled;
typedef GrOp INHERITED;
};
#endif
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