src/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 /* Moved here so that FOR_MSW gets defined if we are using wxWindows (GRG) */
  37 #include "xpm.h"
  38
  39 #ifdef FOR_MSW
  40
  41 #include "XpmI.h"           /* for XpmMalloc */
  42
  43 /*
  44  * On DOS size_t is only 2 bytes, thus malloc(size_t s) can only malloc
  45  * 64K. BUT an expression data=malloc(width*height) may result in an
  46  * overflow. So this function takes a long as input, and returns NULL if the
  47  * request is larger than 64K, is size_t is only 2 bytes.
  48  *
  49  * This requires casts like XpmMalloc( (long)width*(long(height)), else it
  50  * might have no effect at all.
  51  */
  52
  53 void *
  54 boundCheckingMalloc(long s)
  55 {
  56     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  57         return (malloc((size_t) s));
  58     } else {
  59         if (sizeof(size_t) == 2) {
  60             if (s > 0xFFFF)
  61                 return (NULL);          /* to large, size_t with 2 bytes
  62                                          * only allows 16 bits */
  63             else
  64                 return (malloc((size_t) s));
  65         } else {                        /* it's not a long, not 2 bytes,
  66                                          * what is it ??? */
  67             return (malloc((size_t) s));
  68         }
  69     }
  70 }
  71 void *
  72 boundCheckingCalloc(long num, long s)
  73 {
  74     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  75         return (calloc((size_t) num, (size_t) s));
  76     } else {
  77         if (sizeof(size_t) == 2) {
  78             if (s > 0xFFFF || num * s > 0xFFFF)
  79                 return (NULL);          /* to large, size_t with 2 bytes
  80                                          * only allows 16 bits */
  81             else
  82                 return (calloc((size_t) num, (size_t) s));
  83         } else {                        /* it's not a long, not 2 bytes,
  84                                          * what is it ??? */
  85             return (calloc((size_t) num, (size_t) s));
  86         }
  87     }
  88 }
  89 void *
  90 boundCheckingRealloc(void *p, long s)
  91 {
  92     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  93         return (realloc(p, (size_t) s));
  94     } else {
  95         if (sizeof(size_t) == 2) {
  96             if (s > 0xFFFF)
  97                 return (NULL);          /* to large, size_t with 2 bytes
  98                                          * only allows 16 bits */
  99             else
 100                 return (realloc(p, (size_t) s));
 101         } else {                        /* it's not a long, not 2 bytes,
 102                                          * what is it ??? */
 103             return (realloc(p, (size_t) s));
 104         }
 105     }
 106 }
 107
 108 /* static Visual theVisual = { 0 }; */
 109 Visual *
 110 XDefaultVisual(Display *display, Screen *screen)
 111 {
 112     return (NULL);                      /* struct could contain info about
 113                                          * MONO, GRAY, COLOR */
 114 }
 115
 116 Screen *
 117 XDefaultScreen(Display *d)
 118 {
 119     return (NULL);
 120 }
 121
 122 /* I get only 1 plane but 8 bits per pixel,
 123    so I think BITSPIXEL should be depth */
 124 int
 125 XDefaultDepth(Display *display, Screen *screen)
 126 {
 127     int d, b;
 128 #ifdef __OS2__
 129     HPS                             hpsScreen;
 130     HDC                             hdcScreen;
 131     LONG                            lPlanes;
 132     LONG                            lBitsPerPixel;
 133     LONG                            nDepth;
 134
 135     hpsScreen = WinGetScreenPS(HWND_DESKTOP);
 136     hdcScreen = GpiQueryDevice(hpsScreen);
 137     DevQueryCaps(hdcScreen, CAPS_COLOR_PLANES, 1L, &lPlanes);
 138     DevQueryCaps(hdcScreen, CAPS_COLOR_BITCOUNT, 1L, &lBitsPerPixel);
 139     b = (int)lBitsPerPixel;
 140 #else
 141     b = GetDeviceCaps(*display, BITSPIXEL);
 142     d = GetDeviceCaps(*display, PLANES);
 143 #endif
 144     return (b);
 145 }
 146
 147 Colormap *
 148 XDefaultColormap(Display *display, Screen *screen)
 149 {
 150     return (NULL);
 151 }
 152
 153 /* convert hex color names,
 154    wrong digits (not a-f,A-F,0-9) are treated as zero */
 155 static int
 156 hexCharToInt(char c)
 157 {
 158     int r;
 159
 160     if (c >= '0' && c <= '9')
 161         r = c - '0';
 162     else if (c >= 'a' && c <= 'f')
 163         r = c - 'a' + 10;
 164     else if (c >= 'A' && c <= 'F')
 165         r = c - 'A' + 10;
 166     else
 167         r = 0;
 168
 169     return (r);
 170 }
 171
 172 static int
 173 rgbFromHex(char *hex, int *r, int *g, int *b)
 174 {
 175     int len;
 176
 177     if (hex == NULL || hex[0] != '#')
 178         return (0);
 179
 180     len = strlen(hex);
 181     if (len == 3 + 1) {
 182         *r = hexCharToInt(hex[1]);
 183         *g = hexCharToInt(hex[2]);
 184         *b = hexCharToInt(hex[3]);
 185     } else if (len == 6 + 1) {
 186         *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 187         *g = hexCharToInt(hex[3]) * 16 + hexCharToInt(hex[4]);
 188         *b = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 189     } else if (len == 12 + 1) {
 190         /* it's like c #32329999CCCC */
 191         /* so for now only take two digits */
 192         *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 193         *g = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 194         *b = hexCharToInt(hex[9]) * 16 + hexCharToInt(hex[10]);
 195     } else
 196         return (0);
 197
 198     return (1);
 199 }
 200
 201 /* Color related functions */
 202 int
 203 XParseColor(Display *d, Colormap *cmap, char *name, XColor *color)
 204 {
 205     int r, g, b;                        /* only 8 bit values used */
 206     int okay;
 207
 208 /* TODO: use colormap via PALETTE */
 209     /* parse name either in table or #RRGGBB #RGB */
 210     if (name == NULL)
 211         return (0);
 212
 213     if (name[0] == '#') {               /* a hex string */
 214         okay = rgbFromHex(name, &r, &g, &b);
 215     } else {
 216         okay = xpmGetRGBfromName(name, &r, &g, &b);
 217     }
 218
 219     if (okay) {
 220 #ifdef __OS2__
 221         color->pixel = OS2RGB(r, g, b);
 222 #else
 223         color->pixel = RGB(r, g, b);
 224 #endif
 225         color->red = (BYTE) r;
 226         color->green = (BYTE) g;
 227         color->blue = (BYTE) b;
 228         return (1);
 229     } else
 230         return (0);                     /* --> ColorError */
 231 }
 232
 233
 234 /* GRG: 2nd arg is Colormap*, not Colormap */
 235
 236 int
 237 XAllocColor(Display *d, Colormap *cmap, XColor *color)
 238 {
 239 /* colormap not used yet so color->pixel is the real COLORREF (RBG) and not an
 240    index in some colormap as in X */
 241     return (1);
 242 }
 243 void
 244 XQueryColors(Display *display, Colormap *colormap,
 245              XColor *xcolors, int ncolors)
 246 {
 247 /* under X this fills the rgb values to given .pixel */
 248 /* since there no colormap use FOR_MSW (not yet!!), rgb is plain encoded */
 249     XColor *xc = xcolors;
 250     int i;
 251
 252     for (i = 0; i < ncolors; i++, xc++) {
 253         xc->red = GetRValue(xc->pixel);
 254         xc->green = GetGValue(xc->pixel);
 255         xc->blue = GetBValue(xc->pixel);
 256     }
 257     return;
 258 }
 259 int
 260 XFreeColors(Display *d, Colormap cmap,
 261             unsigned long pixels[], int npixels, unsigned long planes)
 262 {
 263     /* no colormap yet */
 264     return (0);                         /* correct ??? */
 265 }
 266
 267 /* XImage functions */
 268 XImage *
 269 XCreateImage(Display *d, Visual *v,
 270              int depth, int format,
 271              int x, int y, int width, int height,
 272              int pad, int foo)
 273 {
 274     XImage *img = (XImage *) XpmMalloc(sizeof(XImage));
 275 #ifdef __OS2__
 276     HPS                  hps;
 277     BITMAPINFOHEADER2    bmih;
 278
 279     hps = WinGetScreenPS(HWND_DESKTOP);
 280     memset(&bmih, 0, sizeof(BITMAPINFOHEADER2));
 281     bmih.cbFix = sizeof(BITMAPINFOHEADER2);
 282     bmih.cx = width;
 283     bmih.cy = height;
 284     bmih.cPlanes = 1;
 285     bmih.cBitCount = depth;
 286 #endif
 287
 288     if (img) {
 289         /*JW: This is what it should be, but the picture comes out
 290               just black!?  It appears to be doing monochrome reduction,
 291               but I've got no clue why.  Using CreateBitmap() is supposed
 292               to be slower, but otherwise ok
 293           if ( depth == GetDeviceCaps(*d, BITSPIXEL) ) {
 294             img->bitmap = CreateCompatibleBitmap(*d, width, height);
 295         } else*/ {
 296 #ifdef __OS2__
 297      img->bitmap = GpiCreateBitmap(hps, &bmih, 0L, NULL, NULL);
 298 #else
 299             img->bitmap = CreateBitmap(width, height, 1 /* plane */ ,
 300                                        depth /* bits per pixel */ , NULL);
 301 #endif
 302         }
 303         img->width = width;
 304         img->height = height;
 305         img->depth = depth;
 306     }
 307     return (img);
 308
 309 }
 310
 311 void
 312 XImageFree(XImage *img)
 313 {
 314     if (img) {
 315         XpmFree(img);
 316     }
 317 }
 318 void
 319 XDestroyImage(XImage *img)
 320 {
 321     if (img) {
 322 #ifdef __OS2__
 323      GpiDeleteBitmap(img->bitmap);
 324 #else
 325         DeleteObject(img->bitmap);      /* check return ??? */
 326 #endif
 327         XImageFree(img);
 328     }
 329 }
 330
 331 #endif