DrawingTidbits.h

/*****************************************************************************
 * DrawingTidbits.h
 *****************************************************************************
 * Copyright (C) 2001 the VideoLAN team
 * $Id: DrawingTidbits.h 11664 2005-07-09 06:17:09Z courmisch $
 *
 * Authors: Tony Castley <[email protected]>
 *          Stephan Aßmus <[email protected]>
 *
 * 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__

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