| /* |
| * 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 |