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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 |