forked from KolibriOS/kolibrios
110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*!
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\file Draw_VLine.c
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\author Mario Palomo <mpalomo@ihman.com>
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\author Jose M. de la Huerga Fernández
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\author Pepe González Mora
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\date 05-2002
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Foundation,
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Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#if SDL_DRAW_BPP == 1
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#define SDL_DRAW_PUTPIXEL \
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i = y1-y0+1; \
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switch( i % 4 ) { \
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do{ \
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case 0: *p = color; p+=super->pitch; \
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case 3: *p = color; p+=super->pitch; \
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case 2: *p = color; p+=super->pitch; \
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case 1: *p = color; p+=super->pitch; \
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}while( (i-=4) > 0 ); \
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}
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#elif SDL_DRAW_BPP == 2
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#define SDL_DRAW_PUTPIXEL \
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i = y1-y0+1; \
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switch( i % 4 ) { \
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do{ \
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case 0: *(Uint16*)p = color; p+=super->pitch; \
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case 3: *(Uint16*)p = color; p+=super->pitch; \
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case 2: *(Uint16*)p = color; p+=super->pitch; \
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case 1: *(Uint16*)p = color; p+=super->pitch; \
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}while( (i-=4) > 0 ); \
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}
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#elif SDL_DRAW_BPP == 3
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#define SDL_DRAW_PUTPIXEL_BPP_3_AUX \
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if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { \
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p[0] = colorbyte2; \
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p[1] = colorbyte1; \
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p[2] = colorbyte0; \
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} else { \
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p[0] = colorbyte0; \
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p[1] = colorbyte1; \
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p[2] = colorbyte2; \
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}
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#define SDL_DRAW_PUTPIXEL \
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i = y1-y0+1; \
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switch( i % 4 ) { \
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do{ \
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case 0: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=super->pitch; \
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case 3: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=super->pitch; \
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case 2: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=super->pitch; \
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case 1: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=super->pitch; \
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}while( (i-=4) > 0 ); \
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}
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#elif SDL_DRAW_BPP == 4
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#define SDL_DRAW_PUTPIXEL \
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i = y1-y0+1; \
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switch( i % 4 ) { \
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do{ \
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case 0: *(Uint32*)p = color; p+=super->pitch; \
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case 3: *(Uint32*)p = color; p+=super->pitch; \
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case 2: *(Uint32*)p = color; p+=super->pitch; \
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case 1: *(Uint32*)p = color; p+=super->pitch; \
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}while( (i-=4) > 0 ); \
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}
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#endif /*SDL_DRAW_BPP*/
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void SDL_DRAWFUNCTION(SDL_Surface *super,
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Sint16 x0,Sint16 y0, Sint16 y1,
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Uint32 color)
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{
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#if SDL_DRAW_BPP == 3
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Uint8 colorbyte0 = (Uint8) (color & 0xff);
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Uint8 colorbyte1 = (Uint8) ((color >> 8) & 0xff);
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Uint8 colorbyte2 = (Uint8) ((color >> 16) & 0xff);
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#endif
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register Uint8 *p;
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register Sint16 i;
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if (y0 > y1) { i=y1; y1=y0; y0=i; }
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p = (Uint8*)super->pixels + y0 * super->pitch + x0 * SDL_DRAW_BPP;
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SDL_DRAW_PUTPIXEL
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}/*Draw_VLine*/
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#undef SDL_DRAW_PUTPIXEL
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#undef SDL_DRAW_PUTPIXEL_BPP_3_AUX
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