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| author | initial.commit <initial.commit@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-07-27 00:09:42 +0000 |
|---|---|---|
| committer | initial.commit <initial.commit@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-07-27 00:09:42 +0000 |
| commit | ae2c20f398933a9e86c387dcc465ec0f71065ffc (patch) | |
| tree | de668b1411e2ee0b4e49b6d8f8b68183134ac990 /skia/include/SkCullPoints.h | |
| parent | 09911bf300f1a419907a9412154760efd0b7abc3 (diff) | |
| download | chromium_src-ae2c20f398933a9e86c387dcc465ec0f71065ffc.zip chromium_src-ae2c20f398933a9e86c387dcc465ec0f71065ffc.tar.gz chromium_src-ae2c20f398933a9e86c387dcc465ec0f71065ffc.tar.bz2 | |
Add skia to the repository.
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'skia/include/SkCullPoints.h')
| -rw-r--r-- | skia/include/SkCullPoints.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/skia/include/SkCullPoints.h b/skia/include/SkCullPoints.h new file mode 100644 index 0000000..1a4ef52 --- /dev/null +++ b/skia/include/SkCullPoints.h @@ -0,0 +1,76 @@ +/* include/graphics/SkCullPoints.h +** +** Copyright 2006, Google Inc. +** +** Licensed under the Apache License, Version 2.0 (the "License"); +** you may not use this file except in compliance with the License. +** You may obtain a copy of the License at +** +** http://www.apache.org/licenses/LICENSE-2.0 +** +** Unless required by applicable law or agreed to in writing, software +** distributed under the License is distributed on an "AS IS" BASIS, +** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +** See the License for the specific language governing permissions and +** limitations under the License. +*/ + +#ifndef SkCullPoints_DEFINED +#define SkCullPoints_DEFINED + +#include "SkRect.h" + +class SkCullPoints { +public: + SkCullPoints(); + SkCullPoints(const SkIRect& r); + + void reset(const SkIRect& r); + + /** Start a contour at (x,y). Follow this with call(s) to lineTo(...) + */ + void moveTo(int x, int y); + + enum LineToResult { + kNo_Result, //!< line segment was completely clipped out + kLineTo_Result, //!< path.lineTo(pts[1]); + kMoveToLineTo_Result //!< path.moveTo(pts[0]); path.lineTo(pts[1]); + }; + /** Connect a line to the previous call to lineTo (or moveTo). + */ + LineToResult lineTo(int x, int y, SkIPoint pts[2]); + +private: + SkIRect fR; // the caller's rectangle + SkIPoint fAsQuad[4]; // cache of fR as 4 points + SkIPoint fPrevPt; // private state + LineToResult fPrevResult; // private state + + bool sect_test(int x0, int y0, int x1, int y1) const; +}; + +///////////////////////////////////////////////////////////////////////////////// + +class SkPath; + +/** \class SkCullPointsPath + + Similar to SkCullPoints, but this class handles the return values + from lineTo, and automatically builds a SkPath with the result(s). +*/ +class SkCullPointsPath { +public: + SkCullPointsPath(); + SkCullPointsPath(const SkIRect& r, SkPath* dst); + + void reset(const SkIRect& r, SkPath* dst); + + void moveTo(int x, int y); + void lineTo(int x, int y); + +private: + SkCullPoints fCP; + SkPath* fPath; +}; + +#endif |