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5131 clevermous 1 
/*!
2 
  \file Draw_Round.c
3 
  \author Mario Palomo
4 
  \author Jose M. de la Huerga Fernández
5 
  \author Pepe González Mora
6 
  \date 05-2002
7 
 
8 
  This library is free software; you can redistribute it and/or
9 
  modify it under the terms of the GNU Library General Public
10 
  License as published by the Free Software Foundation; either
11 
  version 2 of the License, or (at your option) any later version.
12 
 
13 
  This library is distributed in the hope that it will be useful,
14 
  but WITHOUT ANY WARRANTY; without even the implied warranty of
15 
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 
  Library General Public License for more details.
17 
 
18 
  You should have received a copy of the GNU Library General Public
19 
  License along with this library; if not, write to the Free Foundation,
20 
  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 
*/
22 
 
23 
/*Circle arcs*/
24 
#define SDL_DRAW_PUTPIXEL_CIRCLE_BPP(A, B, C) \
25 
  *(##A##(##B##(Uint8*)super->pixels + (Ycenter-x)*super->pitch +        \
26 
                                (Xcenter - corner)*SDL_DRAW_BPP)) = C##; \
27 
  *(##A##(##B##(Uint8*)super->pixels + (Ycenter-corner)*super->pitch +   \
28 
                                     (Xcenter - x)*SDL_DRAW_BPP)) = C##; \
29 
  *(##A##(##B##(Uint8*)super->pixels + (Ycenter-corner)*super->pitch +   \
30 
                                    (X2center + x)*SDL_DRAW_BPP)) = C##; \
31 
  *(##A##(##B##(Uint8*)super->pixels + (Ycenter-x)*super->pitch +        \
32 
                               (X2center + corner)*SDL_DRAW_BPP)) = C##; \
33 
  *(##A##(##B##(Uint8*)super->pixels + (Y2center+corner)*super->pitch +  \
34 
                                    (X2center + x)*SDL_DRAW_BPP)) = C##; \
35 
  *(##A##(##B##(Uint8*)super->pixels + (Y2center+x)*super->pitch +       \
36 
                               (X2center + corner)*SDL_DRAW_BPP)) = C##; \
37 
  *(##A##(##B##(Uint8*)super->pixels + (Y2center+corner)*super->pitch +  \
38 
                                     (Xcenter - x)*SDL_DRAW_BPP)) = C##; \
39 
  *(##A##(##B##(Uint8*)super->pixels + (Y2center+x)*super->pitch +       \
40 
                                (Xcenter - corner)*SDL_DRAW_BPP)) = C##;
41 
 
42 
 
43 
#if SDL_DRAW_BPP == 1
44 
#define SDL_DRAW_PUTPIXEL_CIRCLE SDL_DRAW_PUTPIXEL_CIRCLE_BPP(0+,0+,color)
45 
 
46 
#elif SDL_DRAW_BPP == 2
47 
#define SDL_DRAW_PUTPIXEL_CIRCLE SDL_DRAW_PUTPIXEL_CIRCLE_BPP((Uint16*),0+,color)
48 
 
49 
#elif SDL_DRAW_BPP == 3
50 
#define SDL_DRAW_PUTPIXEL_CIRCLE \
51 
  SDL_DRAW_PUTPIXEL_CIRCLE_BPP(0+,1+,colorbyte1)   \
52 
  if (SDL_BYTEORDER == SDL_BIG_ENDIAN) {         \
53 
    SDL_DRAW_PUTPIXEL_CIRCLE_BPP(0+,0+,colorbyte2)   \
54 
    SDL_DRAW_PUTPIXEL_CIRCLE_BPP(0+,2+,colorbyte0) \
55 
  }else{                                         \
56 
    SDL_DRAW_PUTPIXEL_CIRCLE_BPP(0+,0+,colorbyte0)   \
57 
    SDL_DRAW_PUTPIXEL_CIRCLE_BPP(0+,2+,colorbyte2) \
58 
  }
59 
 
60 
#elif SDL_DRAW_BPP == 4
61 
#define SDL_DRAW_PUTPIXEL_CIRCLE SDL_DRAW_PUTPIXEL_CIRCLE_BPP((Uint32*),0+,color)
62 
 
63 
#endif /*SDL_DRAW_BPP*/
64 
 
65 
 
66 
/*Rectangles*/
67 
#if SDL_DRAW_BPP == 1
68 
#define SDL_DRAW_PUTPIXEL \
69 
  memset(p0, color, dx);               \
70 
  memset(p1, color, dx);               \
71 
                                       \
72 
  if (h<3)  return;                    \
73 
  p0 = (Uint8*)super->pixels + Ycenter*super->pitch + x0; \
74 
  p1 = (Uint8*)super->pixels + Ycenter*super->pitch + x0+w-1; \
75 
  i=dy;                                \
76 
  switch( i % 4 ) {                    \
77 
    do{                                \
78 
      case 0:                          \
79 
        *p0 = color; p0+=super->pitch; \
80 
        *p1 = color; p1+=super->pitch; \
81 
      case 3:                          \
82 
        *p0 = color; p0+=super->pitch; \
83 
        *p1 = color; p1+=super->pitch; \
84 
      case 2:                          \
85 
        *p0 = color; p0+=super->pitch; \
86 
        *p1 = color; p1+=super->pitch; \
87 
      case 1:                          \
88 
        *p0 = color; p0+=super->pitch; \
89 
        *p1 = color; p1+=super->pitch; \
90 
    }while( (i-=4) > 0 );              \
91 
  }
92 
 
93 
#elif SDL_DRAW_BPP == 2
94 
#define SDL_DRAW_PUTPIXEL \
95 
  i=dx;                                         \
96 
  switch( i % 4 ) {                             \
97 
    do{                                         \
98 
      case 0:                                   \
99 
        *(Uint16*)p0 = color; p0+=2;            \
100 
        *(Uint16*)p1 = color; p1+=2;            \
101 
      case 3:                                   \
102 
        *(Uint16*)p0 = color; p0+=2;            \
103 
        *(Uint16*)p1 = color; p1+=2;            \
104 
      case 2:                                   \
105 
        *(Uint16*)p0 = color; p0+=2;            \
106 
        *(Uint16*)p1 = color; p1+=2;            \
107 
      case 1:                                   \
108 
        *(Uint16*)p0 = color; p0+=2;            \
109 
        *(Uint16*)p1 = color; p1+=2;            \
110 
    }while( (i-=4) > 0 );                       \
111 
  }                                             \
112 
  if (h<3)  return;                             \
113 
  p0 = (Uint8*)super->pixels + Ycenter*super->pitch + x0*2;       \
114 
  p1 = (Uint8*)super->pixels + Ycenter*super->pitch + (x0+w-1)*2; \
115 
  i=dy;                                         \
116 
  switch( i % 4 ) {                             \
117 
    do{                                         \
118 
      case 0:                                   \
119 
        *(Uint16*)p0 = color; p0+=super->pitch; \
120 
        *(Uint16*)p1 = color; p1+=super->pitch; \
121 
      case 3:                                   \
122 
        *(Uint16*)p0 = color; p0+=super->pitch; \
123 
        *(Uint16*)p1 = color; p1+=super->pitch; \
124 
      case 2:                                   \
125 
        *(Uint16*)p0 = color; p0+=super->pitch; \
126 
        *(Uint16*)p1 = color; p1+=super->pitch; \
127 
      case 1:                                   \
128 
        *(Uint16*)p0 = color; p0+=super->pitch; \
129 
        *(Uint16*)p1 = color; p1+=super->pitch; \
130 
    }while( (i-=4) > 0 );                       \
131 
  }
132 
 
133 
 
134 
#elif SDL_DRAW_BPP == 3
135 
#define SDL_DRAW_PUTPIXEL_BPP_3_AUX \
136 
    if (SDL_BYTEORDER == SDL_BIG_ENDIAN) { \
137 
      p0[0] = colorbyte2;                  \
138 
      p0[1] = colorbyte1;                  \
139 
      p0[2] = colorbyte0;                  \
140 
      p1[0] = colorbyte2;                  \
141 
      p1[1] = colorbyte1;                  \
142 
      p1[2] = colorbyte0;                  \
143 
    } else {                               \
144 
      p0[0] = colorbyte0;                  \
145 
      p0[1] = colorbyte1;                  \
146 
      p0[2] = colorbyte2;                  \
147 
      p1[0] = colorbyte0;                  \
148 
      p1[1] = colorbyte1;                  \
149 
      p1[2] = colorbyte2;                  \
150 
    }
151 
 
152 
#define SDL_DRAW_PUTPIXEL \
153 
  i=dx;                                     \
154 
  switch( i % 4 ) {                         \
155 
    do{                                     \
156 
      case 0:                               \
157 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
158 
        p0+=3; p1+=3;                       \
159 
      case 3:                               \
160 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
161 
        p0+=3; p1+=3;                       \
162 
      case 2:                               \
163 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
164 
        p0+=3; p1+=3;                       \
165 
      case 1:                               \
166 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
167 
        p0+=3; p1+=3;                       \
168 
    }while( (i-=4) > 0 );                   \
169 
  }                                         \
170 
  if (h<3)  return;                         \
171 
  p0 = (Uint8*)super->pixels + Ycenter*super->pitch + x0*3;       \
172 
  p1 = (Uint8*)super->pixels + Ycenter*super->pitch + (x0+w-1)*3; \
173 
  i=dy;                                     \
174 
  switch( i % 4 ) {                         \
175 
    do{                                     \
176 
      case 0:                               \
177 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
178 
        p0+=super->pitch; p1+=super->pitch; \
179 
      case 3:                               \
180 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
181 
        p0+=super->pitch; p1+=super->pitch; \
182 
      case 2:                               \
183 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
184 
        p0+=super->pitch; p1+=super->pitch; \
185 
      case 1:                               \
186 
        SDL_DRAW_PUTPIXEL_BPP_3_AUX         \
187 
        p0+=super->pitch; p1+=super->pitch; \
188 
    }while( (i-=4) > 0 );                   \
189 
  }
190 
 
191 
 
192 
#elif SDL_DRAW_BPP == 4
193 
#ifdef __linux__
194 
#define SDL_DRAW_WMEMSET_START \
195 
if (sizeof(wchar_t) == sizeof(Uint32)) {        \
196 
  wmemset((wchar_t*)p0, color, dx);             \
197 
  wmemset((wchar_t*)p1, color, dx);             \
198 
} else {
199 
#define SDL_DRAW_WMEMSET_END }
200 
#else
201 
#define SDL_DRAW_WMEMSET_START
202 
#define SDL_DRAW_WMEMSET_END
203 
#endif
204 
 
205 
#define SDL_DRAW_PUTPIXEL \
206 
SDL_DRAW_WMEMSET_START                          \
207 
  i=dx;                                         \
208 
  switch( i % 4 ) {                             \
209 
    do{                                         \
210 
      case 0:                                   \
211 
        *(Uint32*)p0 = color; p0+=4;            \
212 
        *(Uint32*)p1 = color; p1+=4;            \
213 
      case 3:                                   \
214 
        *(Uint32*)p0 = color; p0+=4;            \
215 
        *(Uint32*)p1 = color; p1+=4;            \
216 
      case 2:                                   \
217 
        *(Uint32*)p0 = color; p0+=4;            \
218 
        *(Uint32*)p1 = color; p1+=4;            \
219 
      case 1:                                   \
220 
        *(Uint32*)p0 = color; p0+=4;            \
221 
        *(Uint32*)p1 = color; p1+=4;            \
222 
    }while( (i-=4) > 0 );                       \
223 
  }                                             \
224 
SDL_DRAW_WMEMSET_END                            \
225 
  if (h<3)  return;                             \
226 
  p0 = (Uint8*)super->pixels + Ycenter*super->pitch + x0*4;       \
227 
  p1 = (Uint8*)super->pixels + Ycenter*super->pitch + (x0+w-1)*4; \
228 
  i=dy;                                         \
229 
  switch( i % 4 ) {                             \
230 
    do{                                         \
231 
      case 0:                                   \
232 
        *(Uint32*)p0 = color; p0+=super->pitch; \
233 
        *(Uint32*)p1 = color; p1+=super->pitch; \
234 
      case 3:                                   \
235 
        *(Uint32*)p0 = color; p0+=super->pitch; \
236 
        *(Uint32*)p1 = color; p1+=super->pitch; \
237 
      case 2:                                   \
238 
        *(Uint32*)p0 = color; p0+=super->pitch; \
239 
        *(Uint32*)p1 = color; p1+=super->pitch; \
240 
      case 1:                                   \
241 
        *(Uint32*)p0 = color; p0+=super->pitch; \
242 
        *(Uint32*)p1 = color; p1+=super->pitch; \
243 
    }while( (i-=4) > 0 );                       \
244 
  }
245 
 
246 
#endif /*SDL_DRAW_BPP*/
247 
 
248 
 
249 
 
250 
void SDL_DRAWFUNCTION(SDL_Surface *super,
251 
                      Sint16 x0,Sint16 y0, Uint16 w,Uint16 h,
252 
                      Uint16 corner, Uint32 color)
253 
{
254 
#if SDL_DRAW_BPP == 3
255 
  Uint8 colorbyte0 = (Uint8) (color & 0xff);
256 
  Uint8 colorbyte1 = (Uint8) ((color >> 8)  & 0xff);
257 
  Uint8 colorbyte2 = (Uint8) ((color >> 16) & 0xff);
258 
#endif
259 
 
260 
  register Uint8 *p0;
261 
  register Uint8 *p1;
262 
  register Sint16 i;
263 
  Sint16 dx, dy;
264 
 
265 
  Sint16 Xcenter, Ycenter, X2center, Y2center;
266 
 
267 
  Sint16 x = 0;
268 
  Sint16 rightInc = 6;
269 
  Sint16 d, diagonalInc;
270 
 
271 
  if (w==0 || h==0)  return;
272 
 
273 
  /*TODO: We can do better :-)*/
274 
  if (corner!=0) {
275 
    d = w
276 
    --corner;
277 
    if (corner!=0 && corner+2 >= d ) {
278 
      if (corner+2 == d)  --corner;
279 
      else corner = 0;
280 
    }
281 
  }
282 
 
283 
  d = 3 - (corner<<1);
284 
  diagonalInc = 10 - (corner<<2);
285 
 
286 
  /*Rectangles*/
287 
  dx = w - (corner<<1);
288 
  Xcenter = x0+corner;
289 
  dy = h - (corner<<1);
290 
  Ycenter = y0+corner;
291 
 
292 
  /*Centers*/
293 
  X2center=Xcenter+dx-1;
294 
  Y2center=Ycenter+dy-1;
295 
 
296 
  p0 = (Uint8*)super->pixels +    y0    * super->pitch + Xcenter*SDL_DRAW_BPP;
297 
  p1 = (Uint8*)super->pixels + (y0+h-1) * super->pitch + Xcenter*SDL_DRAW_BPP;
298 
 
299 
  SDL_DRAW_PUTPIXEL
300 
 
301 
  while (x < corner) {
302 
 
303 
    SDL_DRAW_PUTPIXEL_CIRCLE
304 
 
305 
    if (d >= 0) {
306 
      d += diagonalInc;
307 
      diagonalInc += 8;
308 
      --corner;
309 
    } else {
310 
      d += rightInc;
311 
      diagonalInc += 4;
312 
    }
313 
    rightInc += 4;
314 
    ++x;
315 
  }/*while*/
316 
 
317 
}/*Draw_Round*/
318 
 
319 
 
320 
#undef SDL_DRAW_PUTPIXEL
321 
#undef SDL_DRAW_PUTPIXEL_CIRCLE
322 
#undef SDL_DRAW_PUTPIXEL_CIRCLE_BPP
323 
 
324 
#undef SDL_DRAW_WMEMSET_START
325 
#undef SDL_DRAW_WMEMSET_END
326