DrawingTidbits.h
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:3k
- /*****************************************************************************
- * DrawingTidbits.h
- *****************************************************************************
- * Copyright (C) 2001 VideoLAN
- * $Id: DrawingTidbits.h 6961 2004-03-05 17:34:23Z sam $
- *
- * Authors: Tony Castley <tcastley@mail.powerup.com.au>
- * Stephan Aßmus <stippi@yellowbites.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifndef __DRAWING_TIBITS__
- #define __DRAWING_TIBITS__
- #include <GraphicsDefs.h>
- rgb_color ShiftColor(rgb_color , float );
- bool operator==(const rgb_color &, const rgb_color &);
- bool operator!=(const rgb_color &, const rgb_color &);
- inline rgb_color
- Color(int32 r, int32 g, int32 b, int32 alpha = 255)
- {
- rgb_color result;
- result.red = r;
- result.green = g;
- result.blue = b;
- result.alpha = alpha;
- return result;
- }
- const rgb_color kWhite = { 255, 255, 255, 255};
- const rgb_color kBlack = { 0, 0, 0, 255};
- const float kDarkness = 1.06;
- const float kDimLevel = 0.6;
- void ReplaceColor(BBitmap *bitmap, rgb_color from, rgb_color to);
- void ReplaceTransparentColor(BBitmap *bitmap, rgb_color with);
- // function can be used to scale the upper left part of
- // a bitmap to fill the entire bitmap, ie fromWidth
- // and fromHeight must be smaller or equal to the bitmaps size!
- // only supported colorspaces are B_RGB32 and B_RGBA32
- status_t scale_bitmap( BBitmap* bitmap,
- uint32 fromWidth, uint32 fromHeight );
- // bitmaps need to be the same size, or this function will fail
- // currently supported conversions:
- // B_YCbCr422 -> B_RGB32
- // B_RGB32 -> B_RGB32
- // B_RGB16 -> B_RGB32
- // not yet implemented conversions:
- // B_YCbCr420 -> B_RGB32
- // B_YUV422 -> B_RGB32
- status_t convert_bitmap(BBitmap* inBitmap, BBitmap* outBitmap);
- // dims bitmap (in place) by finding the distance of
- // the color at each pixel to the provided "center" color
- // and shortens that distance by dimLevel
- // (dimLevel < 1 -> less contrast)
- // (dimLevel > 1 -> more contrast)
- // (dimLevel < 0 -> inverted colors)
- // currently supported colorspaces:
- // B_RGB32
- // B_RGBA32
- // B_CMAP8
- status_t dim_bitmap(BBitmap* bitmap, rgb_color center,
- float dimLevel);
- rgb_color dimmed_color_cmap8(rgb_color color, rgb_color center,
- float dimLevel);
- #endif // __DRAWING_TIBITS__