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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 GrGLPathProgramDataManager_DEFINED
#define GrGLPathProgramDataManager_DEFINED
#include "gl/GrGLProgramDataManager.h"
class GrGLPathProgram;
class GrGLPathProgramBuilder;
/** Manages the resources used by a shader program for NVPR rendering.
*/
class GrGLPathProgramDataManager : SkNoncopyable {
public:
class SeparableVaryingHandle : public GrGLProgramDataManager::ShaderResourceHandle {
public:
/*
* Creates a reference to a separable varying of a GrGLShaderBuilder. The ref can be used
* to set the varying with the corresponding GrGLPathProgramDataManager.
*/
static SeparableVaryingHandle CreateFromSeparableVaryingIndex(int i) {
return GrGLPathProgramDataManager::SeparableVaryingHandle(i);
}
SeparableVaryingHandle() { }
bool operator==(const SeparableVaryingHandle& other) {
return other.fValue == fValue;
}
private:
SeparableVaryingHandle(int value) : ShaderResourceHandle(value) { }
int toProgramDataIndex() const { SkASSERT(isValid()); return fValue; }
int toShaderBuilderIndex() const { return toProgramDataIndex(); }
friend class GrGLPathProgramDataManager; // For accessing toProgramDataIndex().
friend class GrGLPathProcessor; // For accessing toShaderBuilderIndex().
};
struct SeparableVaryingInfo {
GrGLShaderVar fVariable;
GrGLint fLocation;
};
// This uses an allocator rather than array so that the GrGLShaderVars don't move in memory
// after they are inserted. Users of GrGLShaderBuilder get refs to the vars and ptrs to their
// name strings. Otherwise, we'd have to hand out copies.
typedef GrTAllocator<SeparableVaryingInfo> SeparableVaryingInfoArray;
GrGLPathProgramDataManager(GrGLGpu*, GrGLuint programID, const SeparableVaryingInfoArray&);
/** Functions for uploading the varying values.
*/
void setPathFragmentInputTransform(SeparableVaryingHandle u,
int components,
const SkMatrix& matrix) const;
private:
enum {
kUnusedSeparableVarying = -1,
};
struct SeparableVarying {
GrGLint fLocation;
SkDEBUGCODE(
GrSLType fType;
int fArrayCount;
);
};
SkTArray<SeparableVarying, true> fSeparableVaryings;
GrGLGpu* fGpu;
GrGLuint fProgramID;
typedef SkNoncopyable INHERITED;
};
#endif
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