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Diffstat (limited to 'chrome/browser/point_buffer.h')
| -rw-r--r-- | chrome/browser/point_buffer.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/chrome/browser/point_buffer.h b/chrome/browser/point_buffer.h new file mode 100644 index 0000000..a4c16ed --- /dev/null +++ b/chrome/browser/point_buffer.h @@ -0,0 +1,85 @@ +// Copyright 2008, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef CHROME_BROWSER_POINT_BUFFER_H__ +#define CHROME_BROWSER_POINT_BUFFER_H__ + +#include <windows.h> + +#include "base/basictypes.h" + +//////////////////////////////////////////////////////////////////////////////// +// +// PointBuffer class +// +// A facility to accumulate 2d points and produce polygon regions. +// +//////////////////////////////////////////////////////////////////////////////// +class PointBuffer { + public: + + // + // Create an empty path buffer + // + PointBuffer(); + + ~PointBuffer(); + + // + // Add a point in the buffer + // + void AddPoint(const POINT &p); + void AddPoint(int x, int y); + + // + // Return new polygon region matching the current points. + // It is the caller's responsability to delete the returned region by using + // ::DeleteObject() + // + HRGN GetCurrentPolygonRegion() const; + +#if 0 + void Log(); +#endif + + private: + + // + // Grow the point buffer if we are out of space + // + void GrowPointBufferIfNeeded(); + + POINT *points_; + int next_; + int max_count_; + + DISALLOW_EVIL_CONSTRUCTORS(PointBuffer); +}; + +#endif // CHROME_BROWSER_PATH_BUFFER_H__ |