gfx/skia/trunk/src/core/SkPerspIter.h@deefc01c0e14 (annotated)
gfx/skia/trunk/src/core/SkPerspIter.h
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rw-r--r--
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2006 The Android Open Source Project |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | #ifndef SkPerspIter_DEFINED |
| michael@0 | 11 | #define SkPerspIter_DEFINED |
| michael@0 | 12 | |
| michael@0 | 13 | #include "SkMatrix.h" |
| michael@0 | 14 | |
| michael@0 | 15 | class SkPerspIter { |
| michael@0 | 16 | public: |
| michael@0 | 17 | /** Iterate a line through the matrix [x,y] ... [x+count-1, y]. |
| michael@0 | 18 | @param m The matrix we will be iterating a line through |
| michael@0 | 19 | @param x The initial X coordinate to be mapped through the matrix |
| michael@0 | 20 | @param y The initial Y coordinate to be mapped through the matrix |
| michael@0 | 21 | @param count The number of points (x,y) (x+1,y) (x+2,y) ... we will eventually map |
| michael@0 | 22 | */ |
| michael@0 | 23 | SkPerspIter(const SkMatrix& m, SkScalar x, SkScalar y, int count); |
| michael@0 | 24 | |
| michael@0 | 25 | /** Return the buffer of [x,y] fixed point values we will be filling. |
| michael@0 | 26 | This always returns the same value, so it can be saved across calls to |
| michael@0 | 27 | next(). |
| michael@0 | 28 | */ |
| michael@0 | 29 | const SkFixed* getXY() const { return fStorage; } |
| michael@0 | 30 | |
| michael@0 | 31 | /** Return the number of [x,y] pairs that have been filled in the getXY() buffer. |
| michael@0 | 32 | When this returns 0, the iterator is finished. |
| michael@0 | 33 | */ |
| michael@0 | 34 | int next(); |
| michael@0 | 35 | |
| michael@0 | 36 | private: |
| michael@0 | 37 | enum { |
| michael@0 | 38 | kShift = 4, |
| michael@0 | 39 | kCount = (1 << kShift) |
| michael@0 | 40 | }; |
| michael@0 | 41 | const SkMatrix& fMatrix; |
| michael@0 | 42 | SkFixed fStorage[kCount * 2]; |
| michael@0 | 43 | SkFixed fX, fY; |
| michael@0 | 44 | SkScalar fSX, fSY; |
| michael@0 | 45 | int fCount; |
| michael@0 | 46 | }; |
| michael@0 | 47 | |
| michael@0 | 48 | #endif |
