src/mac/xpm/simx.c

   1 /*
   2  * Copyright (C) 1989-95 GROUPE BULL
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to
   6  * deal in the Software without restriction, including without limitation the
   7  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   8  * sell copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * Except as contained in this notice, the name of GROUPE BULL shall not be
  22  * used in advertising or otherwise to promote the sale, use or other dealings
  23  * in this Software without prior written authorization from GROUPE BULL.
  24  */
  25
  26 /*****************************************************************************\
  27 * simx.c: 0.1a                                                                *
  28 *                                                                             *
  29 * This emulates some Xlib functionality for MSW. It's not a general solution, *
  30 * it is close related to XPM-lib. It is only intended to satisfy what is need *
  31 * there. Thus allowing to read XPM files under MS windows.                    *
  32 *                                                                             *
  33 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
  34 \*****************************************************************************/
  35
  36 #include "xpm.h"
  37 #include "xpmi.h"                       /* for XpmMalloc */
  38
  39 #ifdef FOR_MSW
  40
  41 /*
  42  * On DOS size_t is only 2 bytes, thus malloc(size_t s) can only malloc
  43  * 64K. BUT an expression data=malloc(width*height) may result in an
  44  * overflow. So this function takes a long as input, and returns NULL if the
  45  * request is larger than 64K, is size_t is only 2 bytes.
  46  *
  47  * This requires casts like XpmMalloc( (long)width*(long(height)), else it
  48  * might have no effect at all.
  49  */
  50
  51 void *
  52 boundCheckingMalloc(long s)
  53 {
  54     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  55         return (malloc((size_t) s));
  56     } else {
  57         if (sizeof(size_t) == 2) {
  58             if (s > 0xFFFF)
  59                 return (NULL);          /* to large, size_t with 2 bytes
  60                                          * only allows 16 bits */
  61             else
  62                 return (malloc((size_t) s));
  63         } else {                        /* it's not a long, not 2 bytes,
  64                                          * what is it ??? */
  65             return (malloc((size_t) s));
  66         }
  67     }
  68 }
  69 void *
  70 boundCheckingCalloc(long num, long s)
  71 {
  72     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  73         return (calloc((size_t) num, (size_t) s));
  74     } else {
  75         if (sizeof(size_t) == 2) {
  76             if (s > 0xFFFF || num * s > 0xFFFF)
  77                 return (NULL);          /* to large, size_t with 2 bytes
  78                                          * only allows 16 bits */
  79             else
  80                 return (calloc((size_t) num, (size_t) s));
  81         } else {                        /* it's not a long, not 2 bytes,
  82                                          * what is it ??? */
  83             return (calloc((size_t) num, (size_t) s));
  84         }
  85     }
  86 }
  87 void *
  88 boundCheckingRealloc(void *p, long s)
  89 {
  90     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  91         return (realloc(p, (size_t) s));
  92     } else {
  93         if (sizeof(size_t) == 2) {
  94             if (s > 0xFFFF)
  95                 return (NULL);          /* to large, size_t with 2 bytes
  96                                          * only allows 16 bits */
  97             else
  98                 return (realloc(p, (size_t) s));
  99         } else {                        /* it's not a long, not 2 bytes,
 100                                          * what is it ??? */
 101             return (realloc(p, (size_t) s));
 102         }
 103     }
 104 }
 105 #endif
 106
 107 /* static Visual theVisual = { 0 }; */
 108 Visual *
 109 XDefaultVisual(Display *display, Screen *screen)
 110 {
 111     return (NULL);                      /* struct could contain info about
 112                                          * MONO, GRAY, COLOR */
 113 }
 114
 115 Screen *
 116 XDefaultScreen(Display *d)
 117 {
 118     return (NULL);
 119 }
 120
 121 /* I get only 1 plane but 8 bits per pixel,
 122    so I think BITSPIXEL should be depth */
 123 int
 124 XDefaultDepth(Display *display, Screen *screen)
 125 {
 126 #ifdef FOR_MSW
 127     int d, b;
 128
 129     b = GetDeviceCaps(*display, BITSPIXEL);
 130     d = GetDeviceCaps(*display, PLANES);
 131     return (b);
 132 #else
 133         return (**((*display)->gdPMap)).pixelSize ;
 134 #endif
 135 }
 136
 137 Colormap *
 138 XDefaultColormap(Display *display, Screen *screen)
 139 {
 140     return (NULL);
 141 }
 142
 143 /* convert hex color names,
 144    wrong digits (not a-f,A-F,0-9) are treated as zero */
 145 static int
 146 hexCharToInt(c)
 147 {
 148     int r;
 149
 150     if (c >= '0' && c <= '9')
 151         r = c - '0';
 152     else if (c >= 'a' && c <= 'f')
 153         r = c - 'a' + 10;
 154     else if (c >= 'A' && c <= 'F')
 155         r = c - 'A' + 10;
 156     else
 157         r = 0;
 158
 159     return (r);
 160 }
 161
 162 static int
 163 rgbFromHex(char *hex, int *r, int *g, int *b)
 164 {
 165     int len;
 166
 167     if (hex == NULL || hex[0] != '#')
 168         return (0);
 169
 170     len = strlen(hex);
 171     if (len == 3 + 1)
 172     {
 173                 *r = hexCharToInt(hex[1]);
 174                 *g = hexCharToInt(hex[2]);
 175                 *b = hexCharToInt(hex[3]);
 176                 #ifdef macintosh
 177                 *r <<= 12 ;
 178                 *g <<= 12 ;
 179                 *b <<= 12 ;
 180                 #endif
 181     } else if (len == 6 + 1)
 182     {
 183                 *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 184                 *g = hexCharToInt(hex[3]) * 16 + hexCharToInt(hex[4]);
 185                 *b = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 186                 #ifdef macintosh
 187                 *r <<= 8 ;
 188                 *g <<= 8 ;
 189                 *b <<= 8 ;
 190                 #endif
 191     } else if (len == 12 + 1)
 192     {
 193                 /* it's like c #32329999CCCC */
 194                 #ifdef macintosh
 195                 *r = hexCharToInt(hex[1]) * 0x1000 + hexCharToInt(hex[2]) *0x0100 + hexCharToInt(hex[3]) *0x0010 + hexCharToInt(hex[4]) ;
 196                 *g = hexCharToInt(hex[5]) * 0x1000 + hexCharToInt(hex[6]) *0x0100 + hexCharToInt(hex[7]) *0x0010 + hexCharToInt(hex[8]);
 197                 *b =hexCharToInt(hex[9]) * 0x1000 + hexCharToInt(hex[10]) *0x0100 + hexCharToInt(hex[11]) *0x0010 + hexCharToInt(hex[12]);
 198                 #else
 199                 /* so for now only take two digits */
 200                 *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 201                 *g = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 202                 *b = hexCharToInt(hex[9]) * 16 + hexCharToInt(hex[10]);
 203                 #endif
 204     } else
 205         return (0);
 206
 207     return (1);
 208 }
 209
 210 /* Color related functions */
 211 int
 212 XParseColor(Display *d, Colormap *cmap, char *name, XColor *color)
 213 {
 214     int r, g, b;                        /* only 8 bit values used */
 215     int okay;
 216
 217 /* TODO: use colormap via PALETTE */
 218     /* parse name either in table or #RRGGBB #RGB */
 219     if (name == NULL)
 220         return (0);
 221
 222     if (name[0] == '#') {               /* a hex string */
 223         okay = rgbFromHex(name, &r, &g, &b);
 224     } else {
 225         okay = xpmGetRGBfromName(name, &r, &g, &b);
 226     }
 227
 228     if (okay)
 229     {
 230         #ifdef FOR_MSW
 231                         color->pixel = RGB(r, g, b);
 232                         color->red = (BYTE) r;
 233                         color->green = (BYTE) g;
 234                         color->blue = (BYTE) b;
 235         #elif macintosh
 236                 color->pixel.red = r ;
 237                 color->pixel.green = g ;
 238                 color->pixel.blue = b ;
 239
 240                         color->red = r;
 241                         color->green = g;
 242                         color->blue = b;
 243         #endif
 244                 return (1);
 245     }
 246     else
 247         return (0);                     /* --> ColorError */
 248 }
 249
 250
 251 int
 252 XAllocColor(Display *d, Colormap *cmap, XColor *color)
 253 {
 254 /* colormap not used yet so color->pixel is the real COLORREF (RBG) and not an
 255    index in some colormap as in X */
 256     return (1);
 257 }
 258 void
 259 XQueryColors(Display *display, Colormap *colormap,
 260              XColor *xcolors, int ncolors)
 261 {
 262 /* under X this fills the rgb values to given .pixel */
 263 /* since there no colormap use FOR_MSW (not yet!!), rgb is plain encoded */
 264     XColor *xc = xcolors;
 265     int i;
 266
 267     for (i = 0; i < ncolors; i++, xc++) {
 268         xc->red = GetRValue(xc->pixel);
 269         xc->green = GetGValue(xc->pixel);
 270         xc->blue = GetBValue(xc->pixel);
 271     }
 272     return;
 273 }
 274 int
 275 XFreeColors(Display *d, Colormap cmap,
 276             unsigned long pixels[], int npixels, unsigned long planes)
 277 {
 278     /* no colormap yet */
 279     return (0);                         /* correct ??? */
 280 }
 281
 282 /* XImage functions */
 283 XImage *
 284 XCreateImage(Display *d, Visual *v,
 285              int depth, int format,
 286              int x, int y, int width, int height,
 287              int pad, int foo)
 288 {
 289     XImage *img = (XImage *) XpmMalloc(sizeof(XImage));
 290
 291     if (img)
 292     {
 293     #if FOR_MSW
 294         /*JW: This is what it should be, but the picture comes out
 295               just black!?  It appears to be doing monochrome reduction,
 296               but I've got no clue why.  Using CreateBitmap() is supposed
 297               to be slower, but otherwise ok
 298           if ( depth == GetDeviceCaps(*d, BITSPIXEL) ) {
 299             img->bitmap = CreateCompatibleBitmap(*d, width, height);
 300         } else*/
 301         {
 302             img->bitmap = CreateBitmap(width, height, 1 /* plane */ ,
 303                                        depth /* bits per pixel */ , NULL);
 304                 }
 305         #elif macintosh
 306                 Rect rect ;
 307
 308                 rect.left= rect.top = 0 ;
 309                 rect.right = width ;
 310                 rect.bottom = height ;
 311
 312                 NewGWorld( &img->gworldptr , depth , &rect , NULL , NULL , 0 ) ;
 313                 if (img->gworldptr == NULL)
 314                 {
 315                 XDestroyImage (img);
 316                 return NULL;
 317                 }
 318 /*
 319                 else
 320                 {
 321                         RGBColor                gray = { 0xEEEE ,0xEEEE , 0xEEEE } ;
 322                         RGBBackColor( &gray ) ;
 323                         EraseRect(&rect) ;
 324                 }
 325 */
 326         #endif
 327         img->width = width;
 328         img->height = height;
 329         img->depth = depth;
 330     }
 331     return (img);
 332
 333 }
 334
 335 void
 336 XImageFree(XImage *img)
 337 {
 338     if (img) {
 339         XpmFree(img);
 340     }
 341 }
 342 void
 343 XDestroyImage(XImage *img)
 344 {
 345     if (img) {
 346     #if FOR_MSW
 347         DeleteObject(img->bitmap);      /* check return ??? */
 348         #elif macintosh
 349         if ( img->gworldptr )
 350                 DisposeGWorld( img->gworldptr ) ;
 351         #endif
 352         XImageFree(img);
 353     }
 354 }
 355