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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrFPArgs_DEFINED
#define GrFPArgs_DEFINED
#include "SkFilterQuality.h"
#include "SkMatrix.h"
class GrContext;
class GrColorSpaceInfo;
struct GrFPArgs {
GrFPArgs(GrContext* context,
const SkMatrix* viewMatrix,
SkFilterQuality filterQuality,
const GrColorSpaceInfo* dstColorSpaceInfo)
: fContext(context)
, fViewMatrix(viewMatrix)
, fFilterQuality(filterQuality)
, fDstColorSpaceInfo(dstColorSpaceInfo) {
SkASSERT(fContext);
SkASSERT(fViewMatrix);
}
class WithPreLocalMatrix;
class WithPostLocalMatrix;
GrContext* fContext;
const SkMatrix* fViewMatrix;
// We track both pre and post local matrix adjustments. For a given FP:
//
// total_local_matrix = postLocalMatrix x FP_localMatrix x preLocalMatrix
//
// Use the helpers above to create pre/post GrFPArgs wrappers.
//
const SkMatrix* fPreLocalMatrix = nullptr;
const SkMatrix* fPostLocalMatrix = nullptr;
SkFilterQuality fFilterQuality;
const GrColorSpaceInfo* fDstColorSpaceInfo;
};
class GrFPArgs::WithPreLocalMatrix final : public GrFPArgs {
public:
WithPreLocalMatrix(const GrFPArgs& args, const SkMatrix& lm) : INHERITED(args) {
if (!lm.isIdentity()) {
if (fPreLocalMatrix) {
fStorage.setConcat(lm, *fPreLocalMatrix);
fPreLocalMatrix = fStorage.isIdentity() ? nullptr : &fStorage;
} else {
fPreLocalMatrix = &lm;
}
}
}
private:
WithPreLocalMatrix(const WithPreLocalMatrix&) = delete;
WithPreLocalMatrix& operator=(const WithPreLocalMatrix&) = delete;
SkMatrix fStorage;
using INHERITED = GrFPArgs;
};
class GrFPArgs::WithPostLocalMatrix final : public GrFPArgs {
public:
WithPostLocalMatrix(const GrFPArgs& args, const SkMatrix& lm) : INHERITED(args) {
if (!lm.isIdentity()) {
if (fPostLocalMatrix) {
fStorage.setConcat(*fPostLocalMatrix, lm);
fPostLocalMatrix = fStorage.isIdentity() ? nullptr : &fStorage;
} else {
fPostLocalMatrix = &lm;
}
}
}
private:
WithPostLocalMatrix(const WithPostLocalMatrix&) = delete;
WithPostLocalMatrix& operator=(const WithPostLocalMatrix&) = delete;
SkMatrix fStorage;
using INHERITED = GrFPArgs;
};
#endif
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