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- /*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkMatrixUtils_DEFINED
- #define SkMatrixUtils_DEFINED
- #include "include/core/SkPoint.h"
- #include "include/core/SkSize.h"
- class SkMatrix;
- class SkPaint;
- /**
- * Given a matrix, size and paint, return true if the computed dst-rect would
- * align such that there is a 1-to-1 coorspondence between src and dst pixels.
- * This can be called by drawing code to see if drawBitmap can be turned into
- * drawSprite (which is faster).
- *
- * The src-rect is defined to be { 0, 0, size.width(), size.height() }
- */
- bool SkTreatAsSprite(const SkMatrix&, const SkISize& size, const SkPaint& paint);
- /** Decomposes the upper-left 2x2 of the matrix into a rotation (represented by
- the cosine and sine of the rotation angle), followed by a non-uniform scale,
- followed by another rotation. If there is a reflection, one of the scale
- factors will be negative.
- Returns true if successful. Returns false if the matrix is degenerate.
- */
- bool SkDecomposeUpper2x2(const SkMatrix& matrix,
- SkPoint* rotation1,
- SkPoint* scale,
- SkPoint* rotation2);
- #endif
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