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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkAutoBlitterChoose_DEFINED
#define SkAutoBlitterChoose_DEFINED
#include "SkArenaAlloc.h"
#include "SkBlitter.h"
#include "SkDraw.h"
#include "SkMacros.h"
class SkMatrix;
class SkPaint;
class SkPixmap;
class SkAutoBlitterChoose : SkNoncopyable {
public:
SkAutoBlitterChoose() {}
SkAutoBlitterChoose(const SkDraw& draw, const SkMatrix* matrix, const SkPaint& paint,
bool drawCoverage = false) {
this->choose(draw, matrix, paint, drawCoverage);
}
SkBlitter* operator->() { return fBlitter; }
SkBlitter* get() const { return fBlitter; }
SkBlitter* choose(const SkDraw& draw, const SkMatrix* matrix, const SkPaint& paint,
bool drawCoverage = false) {
SkASSERT(!fBlitter);
if (!matrix) {
matrix = draw.fMatrix;
}
fBlitter = SkBlitter::Choose(draw.fDst, *matrix, paint, &fAlloc, drawCoverage);
if (draw.fCoverage) {
// hmm, why can't choose ignore the paint if drawCoverage is true?
SkBlitter* coverageBlitter = SkBlitter::Choose(*draw.fCoverage, *matrix, SkPaint(),
&fAlloc, true);
fBlitter = fAlloc.make<SkPairBlitter>(fBlitter, coverageBlitter);
}
return fBlitter;
}
private:
// Owned by fAlloc, which will handle the delete.
SkBlitter* fBlitter = nullptr;
SkSTArenaAlloc<kSkBlitterContextSize> fAlloc;
};
#define SkAutoBlitterChoose(...) SK_REQUIRE_LOCAL_VAR(SkAutoBlitterChoose)
#endif
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