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75 lines
3.1 KiB
75 lines
3.1 KiB
/***************************************************************************
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rgb2yuvdefs.h - description
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-------------------
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begin : Tue Nov 2 2000
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copyright : (C) 2000 by Christian Gerlach
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email : cgerlach@rhrk.uni-kl.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef __RGB2YUVDEFS_H
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#define __RGB2YUVDEFS_H
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/* gcc 3.3.1 and later optimise the "not used" (only in asm code)
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symbols away. So we need to mark them as used. */
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#if defined(__GNUC_PREREQ__) && !defined(__GNUC_PREREQ)
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#define __GNUC_PREREQ __GNUC_PREREQ__
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#endif
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#ifdef __GNUC_PREREQ
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#if __GNUC_PREREQ (3,1)
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# define __attribute_used__ __attribute__ ((__used__))
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#else
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# define __attribute_used__
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#endif
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#else
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# define __attribute_used__
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#endif
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// hicolor mode (16 bit) with r(5) g(6) b(5) bits (reverse order b, g, r)
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#define RED(rgb) (unsigned char) ((rgb) << 3)
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#define GREEN(rgb) (((rgb) & 0x7e0) >> 3)
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#define BLUE(rgb) (((rgb) & 0xf800) >> 8)
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#define YUV_SHIFT 15
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#define YUV_HALF (1<<(YUV_SHIFT-1))
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#define YUV_ONE (1<<YUV_SHIFT)
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#define Y_R ((int)( 0.299 * YUV_ONE ))
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#define Y_G ((int)( 0.587 * YUV_ONE ))
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#define Y_B ((int)( 0.114 * YUV_ONE ))
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#define U_R ((int)(-0.146 * YUV_ONE ))
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#define U_G ((int)(-0.288 * YUV_ONE ))
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#define U_B ((int)( 0.434 * YUV_ONE ))
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#define V_R ((int)( 0.617 * YUV_ONE ))
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#define V_G ((int)(-0.517 * YUV_ONE ))
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#define V_B ((int)(-0.100 * YUV_ONE ))
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#define Y_RGB(R,G,B) (( Y_R * (R) + Y_G * (G) + Y_B * (B)) >> YUV_SHIFT)
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#define U_RGB(R,G,B) ((( U_R * (R) + U_G * (G) + U_B * (B)) >> YUV_SHIFT) + 128)
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#define V_RGB(R,G,B) ((( V_R * (R) + V_G * (G) + V_B * (B)) >> YUV_SHIFT) + 128)
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static unsigned char __attribute_used__ CLEARX[8] = { 255, 0, 255, 0, 255, 0, 255, 0 };
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static short __attribute_used__ ZEROSX[4] = { 0, 0, 0, 0 };
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static short __attribute_used__ OFFSETDX[4] = { 0, 64, 0, 64 };
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static short __attribute_used__ OFFSETWX[4] = { 128, 0, 128, 0 };
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static short __attribute_used__ OFFSETBX[4] = { 128, 128, 128, 128 };
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static short __attribute_used__ YR0GRX[4] = { Y_R, Y_G, 0, Y_R };
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static short __attribute_used__ YBG0BX[4] = { Y_B, 0, Y_G, Y_B };
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static short __attribute_used__ UR0GRX[4] = { U_R, U_G, 0, U_R };
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static short __attribute_used__ UBG0BX[4] = { U_B, 0, U_G, U_B };
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static short __attribute_used__ VR0GRX[4] = { V_R, V_G, 0, V_R };
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static short __attribute_used__ VBG0BX[4] = { V_B, 0, V_G, V_B };
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#endif
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