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| /*! |
| \file Draw_HLine.c |
| \author Mario Palomo <mpalomo@ihman.com> |
| \author Jose M. de la Huerga Fernández |
| \author Pepe González Mora |
| \date 05-2002 |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with this library; if not, write to the Free Foundation, |
| Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #if SDL_DRAW_BPP == 1 |
| #define SDL_DRAW_PUTPIXEL \ |
| memset(p, color, x1-x0+1); |
| |
| #elif SDL_DRAW_BPP == 2 |
| #define SDL_DRAW_PUTPIXEL \ |
| i = x1-x0+1; \ |
| switch( i % 4 ) { \ |
| do{ \ |
| case 0: *(Uint16*)p = color; p+=2; \ |
| case 3: *(Uint16*)p = color; p+=2; \ |
| case 2: *(Uint16*)p = color; p+=2; \ |
| case 1: *(Uint16*)p = color; p+=2; \ |
| }while( (i-=4) > 0 ); \ |
| } |
| |
| #elif SDL_DRAW_BPP == 3 |
| #define SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
| if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ |
| p[0] = colorbyte2; \ |
| p[1] = colorbyte1; \ |
| p[2] = colorbyte0; \ |
| } else { \ |
| p[0] = colorbyte0; \ |
| p[1] = colorbyte1; \ |
| p[2] = colorbyte2; \ |
| } |
| |
| #define SDL_DRAW_PUTPIXEL \ |
| i = x1-x0+1; \ |
| switch( i % 4 ) { \ |
| do{ \ |
| case 0: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=3; \ |
| case 3: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=3; \ |
| case 2: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=3; \ |
| case 1: SDL_DRAW_PUTPIXEL_BPP_3_AUX p+=3; \ |
| }while( (i-=4) > 0 ); \ |
| } |
| |
| #elif SDL_DRAW_BPP == 4 |
| |
| #ifdef __linux__ |
| #define SDL_DRAW_WMEMSET_START \ |
| if (sizeof(wchar_t) == sizeof(Uint32)) { \ |
| wmemset((wchar_t*)p, color, x1-x0+1); \ |
| } else { |
| #define SDL_DRAW_WMEMSET_END } |
| #else |
| #define SDL_DRAW_WMEMSET_START |
| #define SDL_DRAW_WMEMSET_END |
| #endif |
| |
| #define SDL_DRAW_PUTPIXEL \ |
| SDL_DRAW_WMEMSET_START \ |
| i = x1-x0+1; \ |
| switch( i % 4 ) { \ |
| do{ \ |
| case 0: *(Uint32*)p = color; p+=4; \ |
| case 3: *(Uint32*)p = color; p+=4; \ |
| case 2: *(Uint32*)p = color; p+=4; \ |
| case 1: *(Uint32*)p = color; p+=4; \ |
| }while( (i-=4) > 0 ); \ |
| } \ |
| SDL_DRAW_WMEMSET_END |
| |
| #endif /*SDL_DRAW_BPP*/ |
| |
| |
| void SDL_DRAWFUNCTION(SDL_Surface *super, |
| Sint16 x0,Sint16 y0, Sint16 x1, |
| Uint32 color) |
| { |
| #if SDL_DRAW_BPP == 3 |
| Uint8 colorbyte0 = (Uint8) (color & 0xff); |
| Uint8 colorbyte1 = (Uint8) ((color >> 8) & 0xff); |
| Uint8 colorbyte2 = (Uint8) ((color >> 16) & 0xff); |
| #endif |
| |
| register Uint8 *p; |
| register Sint16 i; |
| |
| if (x0 > x1) { i=x1; x1=x0; x0=i; } |
| p = (Uint8*)super->pixels + y0 * super->pitch + x0 * SDL_DRAW_BPP; |
| |
| SDL_DRAW_PUTPIXEL |
| |
| }/*Draw_HLine*/ |
| |
| |
| #undef SDL_DRAW_PUTPIXEL |
| #undef SDL_DRAW_PUTPIXEL_BPP_3_AUX |
| |
| #undef SDL_DRAW_WMEMSET_START |
| #undef SDL_DRAW_WMEMSET_END |
| |