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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | /*! |
| 2 | \file Draw_FillCircle.c |
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| 3 | \author Mario Palomo |
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| 4 | \author Jose M. de la Huerga Fernández |
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| 5 | \author Pepe González Mora |
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| 6 | \date 05-2002 |
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| 7 | |||
| 8 | This library is free software; you can redistribute it and/or |
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| 9 | modify it under the terms of the GNU Library General Public |
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| 10 | License as published by the Free Software Foundation; either |
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| 11 | version 2 of the License, or (at your option) any later version. |
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| 12 | |||
| 13 | This library is distributed in the hope that it will be useful, |
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | Library General Public License for more details. |
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| 17 | |||
| 18 | You should have received a copy of the GNU Library General Public |
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| 19 | License along with this library; if not, write to the Free Foundation, |
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| 20 | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #if SDL_DRAW_BPP == 1 |
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| 24 | #define SDL_DRAW_PUTPIXEL \ |
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| 25 | memset(p0, color, 2*x+1); \ |
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| 26 | memset(p1, color, 2*x+1); \ |
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| 27 | p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)); \ |
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| 28 | p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)); \ |
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| 29 | memset(p0, color, 2*y+1); \ |
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| 30 | memset(p1, color, 2*y+1); |
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| 31 | |||
| 32 | #elif SDL_DRAW_BPP == 2 |
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| 33 | #define SDL_DRAW_PUTPIXEL \ |
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| 34 | i = 2*x+1; \ |
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| 35 | switch( i % 4 ) { \ |
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| 36 | do{ \ |
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| 37 | case 0: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 38 | p0+=2; p1+=2; \ |
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| 39 | case 3: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 40 | p0+=2; p1+=2; \ |
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| 41 | case 2: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 42 | p0+=2; p1+=2; \ |
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| 43 | case 1: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 44 | p0+=2; p1+=2; \ |
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| 45 | }while( (i-=4) > 0 ); \ |
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| 46 | } \ |
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| 47 | p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*2); \ |
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| 48 | p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*2); \ |
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| 49 | i = 2*y+1; \ |
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| 50 | switch( i % 4 ) { \ |
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| 51 | do{ \ |
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| 52 | case 0: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 53 | p0+=2; p1+=2; \ |
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| 54 | case 3: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 55 | p0+=2; p1+=2; \ |
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| 56 | case 2: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 57 | p0+=2; p1+=2; \ |
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| 58 | case 1: *(Uint16*)p0 = color; *(Uint16*)p1 = color; \ |
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| 59 | p0+=2; p1+=2; \ |
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| 60 | }while( (i-=4) > 0 ); \ |
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| 61 | } |
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| 62 | |||
| 63 | |||
| 64 | #elif SDL_DRAW_BPP == 3 |
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| 65 | #define SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 66 | if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ |
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| 67 | p0[0] = colorbyte2; \ |
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| 68 | p0[1] = colorbyte1; \ |
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| 69 | p0[2] = colorbyte0; \ |
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| 70 | p1[0] = colorbyte2; \ |
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| 71 | p1[1] = colorbyte1; \ |
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| 72 | p1[2] = colorbyte0; \ |
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| 73 | } else { \ |
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| 74 | p0[0] = colorbyte0; \ |
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| 75 | p0[1] = colorbyte1; \ |
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| 76 | p0[2] = colorbyte2; \ |
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| 77 | p1[0] = colorbyte0; \ |
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| 78 | p1[1] = colorbyte1; \ |
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| 79 | p1[2] = colorbyte2; \ |
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| 80 | } |
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| 81 | |||
| 82 | #define SDL_DRAW_PUTPIXEL \ |
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| 83 | i = 2*x+1; \ |
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| 84 | switch( i % 4 ) { \ |
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| 85 | do{ \ |
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| 86 | case 0: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 87 | p0+=3; p1+=3; \ |
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| 88 | case 3: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 89 | p0+=3; p1+=3; \ |
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| 90 | case 2: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 91 | p0+=3; p1+=3; \ |
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| 92 | case 1: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 93 | p0+=3; p1+=3; \ |
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| 94 | }while( (i-=4) > 0 ); \ |
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| 95 | } \ |
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| 96 | p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*3); \ |
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| 97 | p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*3); \ |
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| 98 | i = 2*y+1; \ |
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| 99 | switch( i % 4 ) { \ |
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| 100 | do{ \ |
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| 101 | case 0: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 102 | p0+=3; p1+=3; \ |
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| 103 | case 3: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 104 | p0+=3; p1+=3; \ |
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| 105 | case 2: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 106 | p0+=3; p1+=3; \ |
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| 107 | case 1: SDL_DRAW_PUTPIXEL_BPP_3_AUX \ |
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| 108 | p0+=3; p1+=3; \ |
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| 109 | }while( (i-=4) > 0 ); \ |
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| 110 | } |
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| 111 | |||
| 112 | |||
| 113 | #elif SDL_DRAW_BPP == 4 |
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| 114 | |||
| 115 | #ifdef __linux__ |
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| 116 | #define SDL_DRAW_WMEMSET_START \ |
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| 117 | if (sizeof(wchar_t) == sizeof(Uint32)) { \ |
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| 118 | wmemset((wchar_t*)p0, color, 2*x+1); \ |
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| 119 | wmemset((wchar_t*)p1, color, 2*x+1); \ |
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| 120 | p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*4); \ |
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| 121 | p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*4); \ |
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| 122 | wmemset((wchar_t*)p0, color, 2*y+1); \ |
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| 123 | wmemset((wchar_t*)p1, color, 2*y+1); \ |
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| 124 | } else { |
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| 125 | #define SDL_DRAW_WMEMSET_END } |
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| 126 | #else |
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| 127 | #define SDL_DRAW_WMEMSET_START |
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| 128 | #define SDL_DRAW_WMEMSET_END |
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| 129 | #endif |
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| 130 | |||
| 131 | #define SDL_DRAW_PUTPIXEL \ |
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| 132 | SDL_DRAW_WMEMSET_START \ |
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| 133 | i = 2*x+1; \ |
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| 134 | switch( i % 4 ) { \ |
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| 135 | do{ \ |
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| 136 | case 0: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 137 | p0+=4; p1+=4; \ |
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| 138 | case 3: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 139 | p0+=4; p1+=4; \ |
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| 140 | case 2: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 141 | p0+=4; p1+=4; \ |
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| 142 | case 1: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 143 | p0+=4; p1+=4; \ |
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| 144 | }while( (i-=4) > 0 ); \ |
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| 145 | } \ |
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| 146 | p0 = ((Uint8*)super->pixels+ (y0+x)*super->pitch+ (x0-y)*4); \ |
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| 147 | p1 = ((Uint8*)super->pixels+ (y0-x)*super->pitch+ (x0-y)*4); \ |
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| 148 | i = 2*y+1; \ |
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| 149 | switch( i % 4 ) { \ |
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| 150 | do{ \ |
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| 151 | case 0: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 152 | p0+=4; p1+=4; \ |
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| 153 | case 3: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 154 | p0+=4; p1+=4; \ |
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| 155 | case 2: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 156 | p0+=4; p1+=4; \ |
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| 157 | case 1: *(Uint32*)p0 = color; *(Uint32*)p1 = color; \ |
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| 158 | p0+=4; p1+=4; \ |
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| 159 | }while( (i-=4) > 0 ); \ |
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| 160 | } \ |
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| 161 | SDL_DRAW_WMEMSET_END |
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| 162 | |||
| 163 | #endif /*SDL_DRAW_BPP*/ |
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| 164 | |||
| 165 | |||
| 166 | |||
| 167 | void SDL_DRAWFUNCTION(SDL_Surface *super, |
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| 168 | Sint16 x0, Sint16 y0, Uint16 r, |
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| 169 | Uint32 color) |
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| 170 | { |
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| 171 | #if SDL_DRAW_BPP == 3 |
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| 172 | Uint8 colorbyte0 = (Uint8) (color & 0xff); |
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| 173 | Uint8 colorbyte1 = (Uint8) ((color >> 8) & 0xff); |
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| 174 | Uint8 colorbyte2 = (Uint8) ((color >> 16) & 0xff); |
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| 175 | #endif |
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| 176 | |||
| 177 | register Uint8 *p0; |
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| 178 | register Uint8 *p1; |
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| 179 | #if SDL_DRAW_BPP != 1 |
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| 180 | register Sint16 i; |
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| 181 | #endif |
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| 182 | |||
| 183 | Sint16 x = 0; |
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| 184 | Sint16 y = r-1; /*radius zero == draw nothing*/ |
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| 185 | Sint16 d = 3 - 2*r; |
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| 186 | Sint16 diagonalInc = 10 - 4*r; |
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| 187 | Sint16 rightInc = 6; |
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| 188 | |||
| 189 | while (x <= y) { |
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| 190 | |||
| 191 | p0 = ((Uint8*)super->pixels+ (y0+y)*super->pitch+ (x0-x)*SDL_DRAW_BPP); |
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| 192 | p1 = ((Uint8*)super->pixels+ (y0-y)*super->pitch+ (x0-x)*SDL_DRAW_BPP); |
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| 193 | |||
| 194 | SDL_DRAW_PUTPIXEL |
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| 195 | |||
| 196 | if (d >= 0) { |
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| 197 | d += diagonalInc; |
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| 198 | diagonalInc += 8; |
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| 199 | y -= 1; |
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| 200 | } else { |
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| 201 | d += rightInc; |
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| 202 | diagonalInc += 4; |
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| 203 | } |
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| 204 | rightInc += 4; |
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| 205 | x += 1; |
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| 206 | } |
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| 207 | |||
| 208 | }/*Draw_FillCircle*/ |
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| 209 | |||
| 210 | |||
| 211 | #undef SDL_DRAW_PUTPIXEL |
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| 212 | #undef SDL_DRAW_PUTPIXEL_BPP_3_AUX |
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| 213 | |||
| 214 | #undef SDL_DRAW_WMEMSET_START |
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| 215 | #undef SDL_DRAW_WMEMSET_END |
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| 216 |