Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 524b588 | 1995-01-04 19:10:35 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 4 | |
| 5 | All Rights Reserved |
| 6 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 9 | provided that the above copyright notice appear in all copies and that |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 10 | both that copyright notice and this permission notice appear in |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 11 | supporting documentation, and that the names of Stichting Mathematisch |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 12 | Centrum or CWI or Corporation for National Research Initiatives or |
| 13 | CNRI not be used in advertising or publicity pertaining to |
| 14 | distribution of the software without specific, written prior |
| 15 | permission. |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 16 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 17 | While CWI is the initial source for this software, a modified version |
| 18 | is made available by the Corporation for National Research Initiatives |
| 19 | (CNRI) at the Internet address ftp://ftp.python.org. |
| 20 | |
| 21 | STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| 22 | REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| 23 | MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| 24 | CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| 25 | DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 26 | PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 27 | TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 28 | PERFORMANCE OF THIS SOFTWARE. |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 29 | |
| 30 | ******************************************************************/ |
| 31 | |
| 32 | /* imageopmodule - Various operations on pictures */ |
| 33 | |
| 34 | #ifdef sun |
| 35 | #define signed |
| 36 | #endif |
| 37 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 38 | #include "Python.h" |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 39 | |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 40 | #if SIZEOF_INT == 4 |
| 41 | typedef int Py_Int32; |
| 42 | typedef unsigned int Py_UInt32; |
| 43 | #else |
| 44 | #if SIZEOF_LONG == 4 |
| 45 | typedef long Py_Int32; |
| 46 | typedef unsigned long Py_UInt32; |
| 47 | #else |
| 48 | #error "No 4-byte integral type" |
| 49 | #endif |
| 50 | #endif |
| 51 | |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 52 | #define CHARP(cp, xmax, x, y) ((char *)(cp+y*xmax+x)) |
Jack Jansen | 76c79e9 | 1996-01-22 14:55:15 +0000 | [diff] [blame] | 53 | #define SHORTP(cp, xmax, x, y) ((short *)(cp+2*(y*xmax+x))) |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 54 | #define LONGP(cp, xmax, x, y) ((Py_Int32 *)(cp+4*(y*xmax+x))) |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 55 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 56 | static PyObject *ImageopError; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 57 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 58 | static PyObject * |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 59 | imageop_crop(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 60 | PyObject *self; |
| 61 | PyObject *args; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 62 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 63 | char *cp, *ncp; |
| 64 | short *nsp; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 65 | Py_Int32 *nlp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 66 | int len, size, x, y, newx1, newx2, newy1, newy2; |
| 67 | int ix, iy, xstep, ystep; |
| 68 | PyObject *rv; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 69 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 70 | if ( !PyArg_Parse(args, "(s#iiiiiii)", &cp, &len, &size, &x, &y, |
| 71 | &newx1, &newy1, &newx2, &newy2) ) |
| 72 | return 0; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 73 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 74 | if ( size != 1 && size != 2 && size != 4 ) { |
| 75 | PyErr_SetString(ImageopError, "Size should be 1, 2 or 4"); |
| 76 | return 0; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 77 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 78 | if ( len != size*x*y ) { |
| 79 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 80 | return 0; |
| 81 | } |
| 82 | xstep = (newx1 < newx2)? 1 : -1; |
| 83 | ystep = (newy1 < newy2)? 1 : -1; |
| 84 | |
| 85 | rv = PyString_FromStringAndSize(NULL, |
| 86 | (abs(newx2-newx1)+1)*(abs(newy2-newy1)+1)*size); |
| 87 | if ( rv == 0 ) |
| 88 | return 0; |
| 89 | ncp = (char *)PyString_AsString(rv); |
| 90 | nsp = (short *)ncp; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 91 | nlp = (Py_Int32 *)ncp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 92 | newy2 += ystep; |
| 93 | newx2 += xstep; |
| 94 | for( iy = newy1; iy != newy2; iy+=ystep ) { |
| 95 | for ( ix = newx1; ix != newx2; ix+=xstep ) { |
| 96 | if ( iy < 0 || iy >= y || ix < 0 || ix >= x ) { |
| 97 | if ( size == 1 ) |
| 98 | *ncp++ = 0; |
| 99 | else |
| 100 | *nlp++ = 0; |
| 101 | } else { |
| 102 | if ( size == 1 ) |
| 103 | *ncp++ = *CHARP(cp, x, ix, iy); |
| 104 | else if ( size == 2 ) |
| 105 | *nsp++ = *SHORTP(cp, x, ix, iy); |
| 106 | else |
| 107 | *nlp++ = *LONGP(cp, x, ix, iy); |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | return rv; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 112 | } |
| 113 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 114 | static PyObject * |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 115 | imageop_scale(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 116 | PyObject *self; |
| 117 | PyObject *args; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 118 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 119 | char *cp, *ncp; |
| 120 | short *nsp; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 121 | Py_Int32 *nlp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 122 | int len, size, x, y, newx, newy; |
| 123 | int ix, iy; |
| 124 | int oix, oiy; |
| 125 | PyObject *rv; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 126 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 127 | if ( !PyArg_Parse(args, "(s#iiiii)", |
| 128 | &cp, &len, &size, &x, &y, &newx, &newy) ) |
| 129 | return 0; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 130 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 131 | if ( size != 1 && size != 2 && size != 4 ) { |
| 132 | PyErr_SetString(ImageopError, "Size should be 1, 2 or 4"); |
| 133 | return 0; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 134 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 135 | if ( len != size*x*y ) { |
| 136 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | rv = PyString_FromStringAndSize(NULL, newx*newy*size); |
| 141 | if ( rv == 0 ) |
| 142 | return 0; |
| 143 | ncp = (char *)PyString_AsString(rv); |
| 144 | nsp = (short *)ncp; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 145 | nlp = (Py_Int32 *)ncp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 146 | for( iy = 0; iy < newy; iy++ ) { |
| 147 | for ( ix = 0; ix < newx; ix++ ) { |
| 148 | oix = ix * x / newx; |
| 149 | oiy = iy * y / newy; |
| 150 | if ( size == 1 ) |
| 151 | *ncp++ = *CHARP(cp, x, oix, oiy); |
| 152 | else if ( size == 2 ) |
| 153 | *nsp++ = *SHORTP(cp, x, oix, oiy); |
| 154 | else |
| 155 | *nlp++ = *LONGP(cp, x, oix, oiy); |
| 156 | } |
| 157 | } |
| 158 | return rv; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 161 | /* Note: this routine can use a bit of optimizing */ |
| 162 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 163 | static PyObject * |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 164 | imageop_tovideo(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 165 | PyObject *self; |
| 166 | PyObject *args; |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 167 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 168 | int maxx, maxy, x, y, len; |
| 169 | int i; |
| 170 | unsigned char *cp, *ncp; |
| 171 | int width; |
| 172 | PyObject *rv; |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 173 | |
| 174 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 175 | if ( !PyArg_Parse(args, "(s#iii)", &cp, &len, &width, &maxx, &maxy) ) |
| 176 | return 0; |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 177 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 178 | if ( width != 1 && width != 4 ) { |
| 179 | PyErr_SetString(ImageopError, "Size should be 1 or 4"); |
| 180 | return 0; |
| 181 | } |
| 182 | if ( maxx*maxy*width != len ) { |
| 183 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 184 | return 0; |
| 185 | } |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 186 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 187 | rv = PyString_FromStringAndSize(NULL, len); |
| 188 | if ( rv == 0 ) |
| 189 | return 0; |
| 190 | ncp = (unsigned char *)PyString_AsString(rv); |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 191 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 192 | if ( width == 1 ) { |
| 193 | memcpy(ncp, cp, maxx); /* Copy first line */ |
| 194 | ncp += maxx; |
| 195 | for (y=1; y<maxy; y++) { /* Interpolate other lines */ |
| 196 | for(x=0; x<maxx; x++) { |
| 197 | i = y*maxx + x; |
| 198 | *ncp++ = ((int)cp[i] + (int)cp[i-maxx]) >> 1; |
| 199 | } |
| 200 | } |
| 201 | } else { |
| 202 | memcpy(ncp, cp, maxx*4); /* Copy first line */ |
| 203 | ncp += maxx*4; |
| 204 | for (y=1; y<maxy; y++) { /* Interpolate other lines */ |
| 205 | for(x=0; x<maxx; x++) { |
| 206 | i = (y*maxx + x)*4 + 1; |
| 207 | *ncp++ = 0; /* Skip alfa comp */ |
| 208 | *ncp++ = ((int)cp[i] + (int)cp[i-4*maxx]) >> 1; |
| 209 | i++; |
| 210 | *ncp++ = ((int)cp[i] + (int)cp[i-4*maxx]) >> 1; |
| 211 | i++; |
| 212 | *ncp++ = ((int)cp[i] + (int)cp[i-4*maxx]) >> 1; |
| 213 | } |
| 214 | } |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 215 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 216 | return rv; |
Jack Jansen | d26b458 | 1993-01-22 15:34:43 +0000 | [diff] [blame] | 217 | } |
| 218 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 219 | static PyObject * |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 220 | imageop_grey2mono(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 221 | PyObject *self; |
| 222 | PyObject *args; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 223 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 224 | int tres, x, y, len; |
| 225 | unsigned char *cp, *ncp; |
| 226 | unsigned char ovalue; |
| 227 | PyObject *rv; |
| 228 | int i, bit; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 229 | |
| 230 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 231 | if ( !PyArg_Parse(args, "(s#iii)", &cp, &len, &x, &y, &tres) ) |
| 232 | return 0; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 233 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 234 | if ( x*y != len ) { |
| 235 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 236 | return 0; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 237 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 238 | |
| 239 | rv = PyString_FromStringAndSize(NULL, (len+7)/8); |
| 240 | if ( rv == 0 ) |
| 241 | return 0; |
| 242 | ncp = (unsigned char *)PyString_AsString(rv); |
| 243 | |
| 244 | bit = 0x80; |
| 245 | ovalue = 0; |
| 246 | for ( i=0; i < len; i++ ) { |
| 247 | if ( (int)cp[i] > tres ) |
| 248 | ovalue |= bit; |
| 249 | bit >>= 1; |
| 250 | if ( bit == 0 ) { |
| 251 | *ncp++ = ovalue; |
| 252 | bit = 0x80; |
| 253 | ovalue = 0; |
| 254 | } |
| 255 | } |
| 256 | if ( bit != 0x80 ) |
| 257 | *ncp++ = ovalue; |
| 258 | return rv; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 259 | } |
| 260 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 261 | static PyObject * |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 262 | imageop_grey2grey4(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 263 | PyObject *self; |
| 264 | PyObject *args; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 265 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 266 | int x, y, len; |
| 267 | unsigned char *cp, *ncp; |
| 268 | unsigned char ovalue; |
| 269 | PyObject *rv; |
| 270 | int i; |
| 271 | int pos; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 272 | |
| 273 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 274 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 275 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 276 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 277 | if ( x*y != len ) { |
| 278 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 279 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 280 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 281 | |
| 282 | rv = PyString_FromStringAndSize(NULL, (len+1)/2); |
| 283 | if ( rv == 0 ) |
| 284 | return 0; |
| 285 | ncp = (unsigned char *)PyString_AsString(rv); |
| 286 | pos = 0; |
| 287 | ovalue = 0; |
| 288 | for ( i=0; i < len; i++ ) { |
| 289 | ovalue |= ((int)cp[i] & 0xf0) >> pos; |
| 290 | pos += 4; |
| 291 | if ( pos == 8 ) { |
| 292 | *ncp++ = ovalue; |
| 293 | ovalue = 0; |
| 294 | pos = 0; |
| 295 | } |
| 296 | } |
| 297 | if ( pos != 0 ) |
| 298 | *ncp++ = ovalue; |
| 299 | return rv; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 300 | } |
| 301 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 302 | static PyObject * |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 303 | imageop_grey2grey2(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 304 | PyObject *self; |
| 305 | PyObject *args; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 306 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 307 | int x, y, len; |
| 308 | unsigned char *cp, *ncp; |
| 309 | unsigned char ovalue; |
| 310 | PyObject *rv; |
| 311 | int i; |
| 312 | int pos; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 313 | |
| 314 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 315 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 316 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 317 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 318 | if ( x*y != len ) { |
| 319 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 320 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 321 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 322 | |
| 323 | rv = PyString_FromStringAndSize(NULL, (len+3)/4); |
| 324 | if ( rv == 0 ) |
| 325 | return 0; |
| 326 | ncp = (unsigned char *)PyString_AsString(rv); |
| 327 | pos = 0; |
| 328 | ovalue = 0; |
| 329 | for ( i=0; i < len; i++ ) { |
| 330 | ovalue |= ((int)cp[i] & 0xc0) >> pos; |
| 331 | pos += 2; |
| 332 | if ( pos == 8 ) { |
| 333 | *ncp++ = ovalue; |
| 334 | ovalue = 0; |
| 335 | pos = 0; |
| 336 | } |
| 337 | } |
| 338 | if ( pos != 0 ) |
| 339 | *ncp++ = ovalue; |
| 340 | return rv; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 341 | } |
| 342 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 343 | static PyObject * |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 344 | imageop_dither2mono(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 345 | PyObject *self; |
| 346 | PyObject *args; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 347 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 348 | int sum, x, y, len; |
| 349 | unsigned char *cp, *ncp; |
| 350 | unsigned char ovalue; |
| 351 | PyObject *rv; |
| 352 | int i, bit; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 353 | |
| 354 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 355 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 356 | return 0; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 357 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 358 | if ( x*y != len ) { |
| 359 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 360 | return 0; |
| 361 | } |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 362 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 363 | rv = PyString_FromStringAndSize(NULL, (len+7)/8); |
| 364 | if ( rv == 0 ) |
| 365 | return 0; |
| 366 | ncp = (unsigned char *)PyString_AsString(rv); |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 367 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 368 | bit = 0x80; |
| 369 | ovalue = 0; |
| 370 | sum = 0; |
| 371 | for ( i=0; i < len; i++ ) { |
| 372 | sum += cp[i]; |
| 373 | if ( sum >= 256 ) { |
| 374 | sum -= 256; |
| 375 | ovalue |= bit; |
| 376 | } |
| 377 | bit >>= 1; |
| 378 | if ( bit == 0 ) { |
| 379 | *ncp++ = ovalue; |
| 380 | bit = 0x80; |
| 381 | ovalue = 0; |
| 382 | } |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 383 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 384 | if ( bit != 0x80 ) |
| 385 | *ncp++ = ovalue; |
| 386 | return rv; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 387 | } |
| 388 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 389 | static PyObject * |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 390 | imageop_dither2grey2(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 391 | PyObject *self; |
| 392 | PyObject *args; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 393 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 394 | int x, y, len; |
| 395 | unsigned char *cp, *ncp; |
| 396 | unsigned char ovalue; |
| 397 | PyObject *rv; |
| 398 | int i; |
| 399 | int pos; |
| 400 | int sum = 0, nvalue; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 401 | |
| 402 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 403 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 404 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 405 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 406 | if ( x*y != len ) { |
| 407 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 408 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 409 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 410 | |
| 411 | rv = PyString_FromStringAndSize(NULL, (len+3)/4); |
| 412 | if ( rv == 0 ) |
| 413 | return 0; |
| 414 | ncp = (unsigned char *)PyString_AsString(rv); |
| 415 | pos = 1; |
| 416 | ovalue = 0; |
| 417 | for ( i=0; i < len; i++ ) { |
| 418 | sum += cp[i]; |
| 419 | nvalue = sum & 0x180; |
| 420 | sum -= nvalue; |
| 421 | ovalue |= nvalue >> pos; |
| 422 | pos += 2; |
| 423 | if ( pos == 9 ) { |
| 424 | *ncp++ = ovalue; |
| 425 | ovalue = 0; |
| 426 | pos = 1; |
| 427 | } |
| 428 | } |
| 429 | if ( pos != 0 ) |
| 430 | *ncp++ = ovalue; |
| 431 | return rv; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 432 | } |
| 433 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 434 | static PyObject * |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 435 | imageop_mono2grey(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 436 | PyObject *self; |
| 437 | PyObject *args; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 438 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 439 | int v0, v1, x, y, len, nlen; |
| 440 | unsigned char *cp, *ncp; |
| 441 | PyObject *rv; |
| 442 | int i, bit; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 443 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 444 | if ( !PyArg_Parse(args, "(s#iiii)", &cp, &len, &x, &y, &v0, &v1) ) |
| 445 | return 0; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 446 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 447 | nlen = x*y; |
| 448 | if ( (nlen+7)/8 != len ) { |
| 449 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 450 | return 0; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 451 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 452 | |
| 453 | rv = PyString_FromStringAndSize(NULL, nlen); |
| 454 | if ( rv == 0 ) |
| 455 | return 0; |
| 456 | ncp = (unsigned char *)PyString_AsString(rv); |
| 457 | |
| 458 | bit = 0x80; |
| 459 | for ( i=0; i < nlen; i++ ) { |
| 460 | if ( *cp & bit ) |
| 461 | *ncp++ = v1; |
| 462 | else |
| 463 | *ncp++ = v0; |
| 464 | bit >>= 1; |
| 465 | if ( bit == 0 ) { |
| 466 | bit = 0x80; |
| 467 | cp++; |
| 468 | } |
| 469 | } |
| 470 | return rv; |
Guido van Rossum | 5f59d60 | 1992-12-14 16:59:51 +0000 | [diff] [blame] | 471 | } |
| 472 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 473 | static PyObject * |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 474 | imageop_grey22grey(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 475 | PyObject *self; |
| 476 | PyObject *args; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 477 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 478 | int x, y, len, nlen; |
| 479 | unsigned char *cp, *ncp; |
| 480 | PyObject *rv; |
| 481 | int i, pos, value = 0, nvalue; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 482 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 483 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 484 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 485 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 486 | nlen = x*y; |
| 487 | if ( (nlen+3)/4 != len ) { |
| 488 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 489 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 490 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 491 | |
| 492 | rv = PyString_FromStringAndSize(NULL, nlen); |
| 493 | if ( rv == 0 ) |
| 494 | return 0; |
| 495 | ncp = (unsigned char *)PyString_AsString(rv); |
| 496 | |
| 497 | pos = 0; |
| 498 | for ( i=0; i < nlen; i++ ) { |
| 499 | if ( pos == 0 ) { |
| 500 | value = *cp++; |
| 501 | pos = 8; |
| 502 | } |
| 503 | pos -= 2; |
| 504 | nvalue = (value >> pos) & 0x03; |
| 505 | *ncp++ = nvalue | (nvalue << 2) | |
| 506 | (nvalue << 4) | (nvalue << 6); |
| 507 | } |
| 508 | return rv; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 509 | } |
| 510 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 511 | static PyObject * |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 512 | imageop_grey42grey(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 513 | PyObject *self; |
| 514 | PyObject *args; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 515 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 516 | int x, y, len, nlen; |
| 517 | unsigned char *cp, *ncp; |
| 518 | PyObject *rv; |
| 519 | int i, pos, value = 0, nvalue; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 520 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 521 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 522 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 523 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 524 | nlen = x*y; |
| 525 | if ( (nlen+1)/2 != len ) { |
| 526 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 527 | return 0; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 528 | } |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 529 | |
| 530 | rv = PyString_FromStringAndSize(NULL, nlen); |
| 531 | if ( rv == 0 ) |
| 532 | return 0; |
| 533 | ncp = (unsigned char *)PyString_AsString(rv); |
| 534 | |
| 535 | pos = 0; |
| 536 | for ( i=0; i < nlen; i++ ) { |
| 537 | if ( pos == 0 ) { |
| 538 | value = *cp++; |
| 539 | pos = 8; |
| 540 | } |
| 541 | pos -= 4; |
| 542 | nvalue = (value >> pos) & 0x0f; |
| 543 | *ncp++ = nvalue | (nvalue << 4); |
| 544 | } |
| 545 | return rv; |
Jack Jansen | de3adf9 | 1992-12-22 14:05:55 +0000 | [diff] [blame] | 546 | } |
| 547 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 548 | static PyObject * |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 549 | imageop_rgb2rgb8(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 550 | PyObject *self; |
| 551 | PyObject *args; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 552 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 553 | int x, y, len, nlen; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 554 | Py_UInt32 *cp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 555 | unsigned char *ncp; |
| 556 | PyObject *rv; |
| 557 | int i, r, g, b; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 558 | Py_UInt32 value, nvalue; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 559 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 560 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 561 | return 0; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 562 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 563 | nlen = x*y; |
| 564 | if ( nlen*4 != len ) { |
| 565 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 566 | return 0; |
| 567 | } |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 568 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 569 | rv = PyString_FromStringAndSize(NULL, nlen); |
| 570 | if ( rv == 0 ) |
| 571 | return 0; |
| 572 | ncp = (unsigned char *)PyString_AsString(rv); |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 573 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 574 | for ( i=0; i < nlen; i++ ) { |
| 575 | /* Bits in source: aaaaaaaa BBbbbbbb GGGggggg RRRrrrrr */ |
| 576 | value = *cp++; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 577 | #if 0 |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 578 | r = (value >> 5) & 7; |
| 579 | g = (value >> 13) & 7; |
| 580 | b = (value >> 22) & 3; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 581 | #else |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 582 | r = (int) ((value & 0xff) / 255. * 7. + .5); |
| 583 | g = (int) (((value >> 8) & 0xff) / 255. * 7. + .5); |
| 584 | b = (int) (((value >> 16) & 0xff) / 255. * 3. + .5); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 585 | #endif |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 586 | nvalue = (r<<5) | (b<<3) | g; |
Guido van Rossum | 644a12b | 1997-04-09 19:24:53 +0000 | [diff] [blame] | 587 | *ncp++ = (unsigned char)nvalue; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 588 | } |
| 589 | return rv; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 590 | } |
| 591 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 592 | static PyObject * |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 593 | imageop_rgb82rgb(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 594 | PyObject *self; |
| 595 | PyObject *args; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 596 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 597 | int x, y, len, nlen; |
| 598 | unsigned char *cp; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 599 | Py_UInt32 *ncp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 600 | PyObject *rv; |
| 601 | int i, r, g, b; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 602 | Py_UInt32 value, nvalue; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 603 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 604 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 605 | return 0; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 606 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 607 | nlen = x*y; |
| 608 | if ( nlen != len ) { |
| 609 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 610 | return 0; |
| 611 | } |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 612 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 613 | rv = PyString_FromStringAndSize(NULL, nlen*4); |
| 614 | if ( rv == 0 ) |
| 615 | return 0; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 616 | ncp = (Py_UInt32 *)PyString_AsString(rv); |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 617 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 618 | for ( i=0; i < nlen; i++ ) { |
| 619 | /* Bits in source: RRRBBGGG |
| 620 | ** Red and Green are multiplied by 36.5, Blue by 85 |
| 621 | */ |
| 622 | value = *cp++; |
| 623 | r = (value >> 5) & 7; |
| 624 | g = (value ) & 7; |
| 625 | b = (value >> 3) & 3; |
| 626 | r = (r<<5) | (r<<3) | (r>>1); |
| 627 | g = (g<<5) | (g<<3) | (g>>1); |
| 628 | b = (b<<6) | (b<<4) | (b<<2) | b; |
| 629 | nvalue = r | (g<<8) | (b<<16); |
| 630 | *ncp++ = nvalue; |
| 631 | } |
| 632 | return rv; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 633 | } |
| 634 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 635 | static PyObject * |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 636 | imageop_rgb2grey(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 637 | PyObject *self; |
| 638 | PyObject *args; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 639 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 640 | int x, y, len, nlen; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 641 | Py_UInt32 *cp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 642 | unsigned char *ncp; |
| 643 | PyObject *rv; |
| 644 | int i, r, g, b; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 645 | Py_UInt32 value, nvalue; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 646 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 647 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 648 | return 0; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 649 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 650 | nlen = x*y; |
| 651 | if ( nlen*4 != len ) { |
| 652 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 653 | return 0; |
| 654 | } |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 655 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 656 | rv = PyString_FromStringAndSize(NULL, nlen); |
| 657 | if ( rv == 0 ) |
| 658 | return 0; |
| 659 | ncp = (unsigned char *)PyString_AsString(rv); |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 660 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 661 | for ( i=0; i < nlen; i++ ) { |
| 662 | value = *cp++; |
| 663 | r = (value ) & 0xff; |
| 664 | g = (value >> 8) & 0xff; |
| 665 | b = (value >> 16) & 0xff; |
| 666 | nvalue = (int)(0.30*r + 0.59*g + 0.11*b); |
| 667 | if ( nvalue > 255 ) nvalue = 255; |
Guido van Rossum | 644a12b | 1997-04-09 19:24:53 +0000 | [diff] [blame] | 668 | *ncp++ = (unsigned char)nvalue; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 669 | } |
| 670 | return rv; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 671 | } |
| 672 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 673 | static PyObject * |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 674 | imageop_grey2rgb(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 675 | PyObject *self; |
| 676 | PyObject *args; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 677 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 678 | int x, y, len, nlen; |
| 679 | unsigned char *cp; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 680 | Py_UInt32 *ncp; |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 681 | PyObject *rv; |
| 682 | int i; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 683 | Py_UInt32 value; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 684 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 685 | if ( !PyArg_Parse(args, "(s#ii)", &cp, &len, &x, &y) ) |
| 686 | return 0; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 687 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 688 | nlen = x*y; |
| 689 | if ( nlen != len ) { |
| 690 | PyErr_SetString(ImageopError, "String has incorrect length"); |
| 691 | return 0; |
| 692 | } |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 693 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 694 | rv = PyString_FromStringAndSize(NULL, nlen*4); |
| 695 | if ( rv == 0 ) |
| 696 | return 0; |
Guido van Rossum | 6901196 | 1998-04-23 20:23:00 +0000 | [diff] [blame] | 697 | ncp = (Py_UInt32 *)PyString_AsString(rv); |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 698 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 699 | for ( i=0; i < nlen; i++ ) { |
| 700 | value = *cp++; |
| 701 | *ncp++ = value | (value << 8 ) | (value << 16); |
| 702 | } |
| 703 | return rv; |
Jack Jansen | 4fada9c | 1993-02-19 15:51:41 +0000 | [diff] [blame] | 704 | } |
| 705 | |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 706 | /* |
| 707 | static object * |
| 708 | imageop_mul(self, args) |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 709 | object *self; |
| 710 | object *args; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 711 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 712 | char *cp, *ncp; |
| 713 | int len, size, x, y; |
| 714 | object *rv; |
| 715 | int i; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 716 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 717 | if ( !getargs(args, "(s#iii)", &cp, &len, &size, &x, &y) ) |
| 718 | return 0; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 719 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 720 | if ( size != 1 && size != 4 ) { |
| 721 | err_setstr(ImageopError, "Size should be 1 or 4"); |
| 722 | return 0; |
| 723 | } |
| 724 | if ( len != size*x*y ) { |
| 725 | err_setstr(ImageopError, "String has incorrect length"); |
| 726 | return 0; |
| 727 | } |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 728 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 729 | rv = newsizedstringobject(NULL, XXXX); |
| 730 | if ( rv == 0 ) |
| 731 | return 0; |
| 732 | ncp = (char *)getstringvalue(rv); |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 733 | |
| 734 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 735 | for ( i=0; i < len; i += size ) { |
| 736 | } |
| 737 | return rv; |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 738 | } |
| 739 | */ |
| 740 | |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 741 | static PyMethodDef imageop_methods[] = { |
| 742 | { "crop", imageop_crop }, |
| 743 | { "scale", imageop_scale }, |
| 744 | { "grey2mono", imageop_grey2mono }, |
| 745 | { "grey2grey2", imageop_grey2grey2 }, |
| 746 | { "grey2grey4", imageop_grey2grey4 }, |
| 747 | { "dither2mono", imageop_dither2mono }, |
| 748 | { "dither2grey2", imageop_dither2grey2 }, |
| 749 | { "mono2grey", imageop_mono2grey }, |
| 750 | { "grey22grey", imageop_grey22grey }, |
| 751 | { "grey42grey", imageop_grey42grey }, |
| 752 | { "tovideo", imageop_tovideo }, |
| 753 | { "rgb2rgb8", imageop_rgb2rgb8 }, |
| 754 | { "rgb82rgb", imageop_rgb82rgb }, |
| 755 | { "rgb2grey", imageop_rgb2grey }, |
| 756 | { "grey2rgb", imageop_grey2rgb }, |
| 757 | { 0, 0 } |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 758 | }; |
| 759 | |
| 760 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 761 | DL_EXPORT(void) |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 762 | initimageop() |
| 763 | { |
Roger E. Masse | a141f8a | 1996-12-20 20:50:39 +0000 | [diff] [blame] | 764 | PyObject *m, *d; |
| 765 | m = Py_InitModule("imageop", imageop_methods); |
| 766 | d = PyModule_GetDict(m); |
Guido van Rossum | 0cb96de | 1997-10-01 04:29:29 +0000 | [diff] [blame] | 767 | ImageopError = PyErr_NewException("imageop.error", NULL, NULL); |
| 768 | if (ImageopError != NULL) |
| 769 | PyDict_SetItemString(d, "error", ImageopError); |
Guido van Rossum | 0317a47 | 1992-10-26 13:40:15 +0000 | [diff] [blame] | 770 | } |