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