| 1 | /* ximage-loader.c --- converts image files or data to XImages or Pixmap. |
| 2 | * xscreensaver, Copyright (c) 1998-2020 Jamie Zawinski <jwz@jwz.org> |
| 3 | * |
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 5 | * documentation for any purpose is hereby granted without fee, provided that |
| 6 | * the above copyright notice appear in all copies and that both that |
| 7 | * copyright notice and this permission notice appear in supporting |
| 8 | * documentation. No representations are made about the suitability of this |
| 9 | * software for any purpose. It is provided "as is" without express or |
| 10 | * implied warranty. |
| 11 | */ |
| 12 | |
| 13 | #ifdef HAVE_CONFIG_H |
| 14 | # include "config.h" |
| 15 | #endif |
| 16 | |
| 17 | #include <stdlib.h> |
| 18 | #include <stdio.h> |
| 19 | #include <string.h> |
| 20 | |
| 21 | #ifdef HAVE_JWXYZ |
| 22 | # include "jwxyz.h" |
| 23 | #else |
| 24 | # include <X11/Xlib.h> |
| 25 | # include <X11/Xutil.h> |
| 26 | #endif |
| 27 | |
| 28 | #include "ximage-loader.h" |
| 29 | |
| 30 | #if defined(HAVE_GDK_PIXBUF) || defined(HAVE_COCOA) || defined(HAVE_ANDROID) |
| 31 | # undef HAVE_LIBPNG |
| 32 | #endif |
| 33 | |
| 34 | #ifdef HAVE_COCOA |
| 35 | # include "grabscreen.h" /* for osx_load_image_file() */ |
| 36 | #endif |
| 37 | |
| 38 | #ifdef HAVE_GDK_PIXBUF |
| 39 | |
| 40 | # if (__GNUC__ >= 4) /* Ignore useless warnings generated by GTK headers */ |
| 41 | # pragma GCC diagnostic push |
| 42 | # pragma GCC diagnostic ignored "-Wlong-long" |
| 43 | # pragma GCC diagnostic ignored "-Wvariadic-macros" |
| 44 | # pragma GCC diagnostic ignored "-Wpedantic" |
| 45 | # endif |
| 46 | |
| 47 | # include <gdk-pixbuf/gdk-pixbuf.h> |
| 48 | # ifdef HAVE_GTK2 |
| 49 | # include <gdk-pixbuf-xlib/gdk-pixbuf-xlib.h> |
| 50 | # else /* !HAVE_GTK2 */ |
| 51 | # include <gdk-pixbuf/gdk-pixbuf-xlib.h> |
| 52 | # endif /* !HAVE_GTK2 */ |
| 53 | |
| 54 | # if (__GNUC__ >= 4) |
| 55 | # pragma GCC diagnostic pop |
| 56 | # endif |
| 57 | |
| 58 | #endif /* HAVE_GDK_PIXBUF */ |
| 59 | |
| 60 | #ifdef HAVE_LIBPNG |
| 61 | # include <png.h> |
| 62 | #endif |
| 63 | |
| 64 | #ifdef HAVE_ANDROID |
| 65 | /* So that debug output shows up in logcat... */ |
| 66 | extern void Log(const char *format, ...); |
| 67 | # undef fprintf |
| 68 | # define fprintf(S, ...) Log(__VA_ARGS__) |
| 69 | #endif |
| 70 | |
| 71 | extern char *progname; |
| 72 | |
| 73 | static Bool |
| 74 | bigendian (void) |
| 75 | { |
| 76 | union { int i; char c[sizeof(int)]; } u; |
| 77 | u.i = 1; |
| 78 | return !u.c[0]; |
| 79 | } |
| 80 | |
| 81 | |
| 82 | #ifdef HAVE_GDK_PIXBUF |
| 83 | |
| 84 | /* Loads the image to an XImage, RGBA -- GDK Pixbuf version. |
| 85 | */ |
| 86 | static XImage * |
| 87 | make_ximage (Display *dpy, Visual *visual, const char *filename, |
| 88 | const unsigned char *image_data, unsigned long data_size) |
| 89 | { |
| 90 | GdkPixbuf *pb; |
| 91 | static int initted = 0; |
| 92 | # ifdef HAVE_GTK2 |
| 93 | GError *gerr = NULL; |
| 94 | # endif |
| 95 | |
| 96 | if (!initted) |
| 97 | { |
| 98 | # ifdef HAVE_GTK2 |
| 99 | # if !GLIB_CHECK_VERSION(2, 36 ,0) |
| 100 | g_type_init (); |
| 101 | # endif |
| 102 | # endif |
| 103 | if (dpy) |
| 104 | { |
| 105 | /* Turns out gdk-pixbuf works even if you don't have display |
| 106 | connection, which is good news for analogtv-cli. */ |
| 107 | gdk_pixbuf_xlib_init (dpy, DefaultScreen (dpy)); |
| 108 | xlib_rgb_init (dpy, DefaultScreenOfDisplay (dpy)); |
| 109 | } |
| 110 | initted = 1; |
| 111 | } |
| 112 | |
| 113 | if (filename) |
| 114 | { |
| 115 | # ifdef HAVE_GTK2 |
| 116 | pb = gdk_pixbuf_new_from_file (filename, &gerr); |
| 117 | if (!pb) |
| 118 | { |
| 119 | fprintf (stderr, "%s: %s\n", progname, gerr->message); |
| 120 | return 0; |
| 121 | } |
| 122 | # else |
| 123 | pb = gdk_pixbuf_new_from_file (filename); |
| 124 | if (!pb) |
| 125 | { |
| 126 | fprintf (stderr, "%s: GDK unable to load %s: %s\n", |
| 127 | progname, filename, (gerr ? gerr->message : "?")); |
| 128 | return 0; |
| 129 | } |
| 130 | # endif /* HAVE_GTK2 */ |
| 131 | } |
| 132 | else |
| 133 | { |
| 134 | # ifdef HAVE_GTK2 |
| 135 | GInputStream *s = |
| 136 | g_memory_input_stream_new_from_data (image_data, data_size, 0); |
| 137 | pb = gdk_pixbuf_new_from_stream (s, 0, &gerr); |
| 138 | |
| 139 | g_input_stream_close (s, NULL, NULL); |
| 140 | /* #### valgrind on xflame says there's a small leak in s? */ |
| 141 | g_object_unref (s); |
| 142 | |
| 143 | if (! pb) |
| 144 | { |
| 145 | /* fprintf (stderr, "%s: GDK unable to parse image data: %s\n", |
| 146 | progname, (gerr ? gerr->message : "?")); */ |
| 147 | return 0; |
| 148 | } |
| 149 | # else /* !HAVE_GTK2 */ |
| 150 | fprintf (stderr, "%s: image loading not supported with GTK 1.x\n", |
| 151 | progname); |
| 152 | return 0; |
| 153 | # endif /* !HAVE_GTK2 */ |
| 154 | } |
| 155 | |
| 156 | if (!pb) abort(); |
| 157 | |
| 158 | { |
| 159 | XImage *image; |
| 160 | int w = gdk_pixbuf_get_width (pb); |
| 161 | int h = gdk_pixbuf_get_height (pb); |
| 162 | guchar *row = gdk_pixbuf_get_pixels (pb); |
| 163 | int stride = gdk_pixbuf_get_rowstride (pb); |
| 164 | int chan = gdk_pixbuf_get_n_channels (pb); |
| 165 | int x, y; |
| 166 | |
| 167 | image = XCreateImage (dpy, visual, 32, ZPixmap, 0, 0, w, h, 32, 0); |
| 168 | image->data = (char *) malloc(h * image->bytes_per_line); |
| 169 | |
| 170 | /* Set the bit order in the XImage structure to whatever the |
| 171 | local host's native bit order is. |
| 172 | */ |
| 173 | image->bitmap_bit_order = |
| 174 | image->byte_order = |
| 175 | (bigendian() ? MSBFirst : LSBFirst); |
| 176 | |
| 177 | if (!image->data) |
| 178 | { |
| 179 | fprintf (stderr, "%s: out of memory (%d x %d)\n", progname, w, h); |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | for (y = 0; y < h; y++) |
| 184 | { |
| 185 | guchar *i = row; |
| 186 | for (x = 0; x < w; x++) |
| 187 | { |
| 188 | unsigned long rgba = 0; |
| 189 | switch (chan) { |
| 190 | case 1: |
| 191 | rgba = ((0xFF << 24) | |
| 192 | (*i << 16) | |
| 193 | (*i << 8) | |
| 194 | *i); |
| 195 | i++; |
| 196 | break; |
| 197 | case 3: |
| 198 | rgba = ((0xFF << 24) | |
| 199 | (i[2] << 16) | |
| 200 | (i[1] << 8) | |
| 201 | i[0]); |
| 202 | i += 3; |
| 203 | break; |
| 204 | case 4: |
| 205 | rgba = ((i[3] << 24) | |
| 206 | (i[2] << 16) | |
| 207 | (i[1] << 8) | |
| 208 | i[0]); |
| 209 | i += 4; |
| 210 | break; |
| 211 | default: |
| 212 | abort(); |
| 213 | break; |
| 214 | } |
| 215 | XPutPixel (image, x, y, rgba); |
| 216 | } |
| 217 | row += stride; |
| 218 | } |
| 219 | |
| 220 | /* #### valgrind on xflame says there's a small leak in pb? */ |
| 221 | g_object_unref (pb); |
| 222 | return image; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | #elif defined(HAVE_JWXYZ) /* MacOS, iOS or Android */ |
| 227 | |
| 228 | /* Loads the image to an XImage, RGBA -- MacOS, iOS or Android version. |
| 229 | */ |
| 230 | static XImage * |
| 231 | make_ximage (Display *dpy, Visual *visual, const char *filename, |
| 232 | const unsigned char *image_data, unsigned long data_size) |
| 233 | { |
| 234 | XImage *ximage = 0; |
| 235 | |
| 236 | if (filename) |
| 237 | { |
| 238 | # ifdef HAVE_COCOA /* MacOS */ |
| 239 | XRectangle geom; |
| 240 | Screen *screen = DefaultScreenOfDisplay (dpy); |
| 241 | Window window = RootWindowOfScreen (screen); |
| 242 | XWindowAttributes xgwa; |
| 243 | XGetWindowAttributes (dpy, window, &xgwa); |
| 244 | Pixmap pixmap = |
| 245 | XCreatePixmap (dpy, window, xgwa.width, xgwa.height, xgwa.depth); |
| 246 | int x, y; |
| 247 | |
| 248 | if (! osx_load_image_file (screen, window, pixmap, filename, &geom)) |
| 249 | { |
| 250 | fprintf (stderr, "%s: %s failed\n", progname, filename); |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | ximage = XGetImage (dpy, pixmap, geom.x, geom.y, |
| 255 | geom.width, geom.height, |
| 256 | ~0L, ZPixmap); |
| 257 | if (!ximage) abort(); |
| 258 | |
| 259 | /* Have to convert ABGR to RGBA */ |
| 260 | for (y = 0; y < ximage->height; y++) |
| 261 | for (x = 0; x < ximage->width; x++) |
| 262 | { |
| 263 | unsigned long p = XGetPixel (ximage, x, y); |
| 264 | unsigned long a = (p >> 24) & 0xFF; |
| 265 | unsigned long b = (p >> 16) & 0xFF; |
| 266 | unsigned long g = (p >> 8) & 0xFF; |
| 267 | unsigned long r = (p >> 0) & 0xFF; |
| 268 | p = (r << 24) | (g << 16) | (b << 8) | (a << 0); |
| 269 | XPutPixel (ximage, x, y, p); |
| 270 | } |
| 271 | |
| 272 | XFreePixmap (dpy, pixmap); |
| 273 | |
| 274 | # else /* !HAVE_COCOA -- iOS or Android. */ |
| 275 | fprintf (stderr, "%s: image file loading not supported\n", progname); |
| 276 | return 0; |
| 277 | # endif /* !HAVE_COCOA */ |
| 278 | } |
| 279 | else |
| 280 | { |
| 281 | ximage = jwxyz_png_to_ximage (dpy, visual, image_data, data_size); |
| 282 | } |
| 283 | |
| 284 | return ximage; |
| 285 | } |
| 286 | |
| 287 | #elif defined(HAVE_LIBPNG) |
| 288 | |
| 289 | typedef struct { |
| 290 | const unsigned char *buf; |
| 291 | png_size_t siz, ptr; |
| 292 | } png_read_closure; |
| 293 | |
| 294 | static void |
| 295 | png_reader_fn (png_structp png_ptr, png_bytep buf, png_size_t siz) |
| 296 | { |
| 297 | png_read_closure *r = png_get_io_ptr (png_ptr); |
| 298 | if (siz > r->siz - r->ptr) |
| 299 | png_error (png_ptr, "PNG internal read error"); |
| 300 | memcpy (buf, r->buf + r->ptr, siz); |
| 301 | r->ptr += siz; |
| 302 | } |
| 303 | |
| 304 | |
| 305 | /* Loads the image to an XImage, RGBA -- libpng version. |
| 306 | */ |
| 307 | static XImage * |
| 308 | make_ximage (Display *dpy, Visual *visual, |
| 309 | const char *filename, const unsigned char *image_data, |
| 310 | unsigned long data_size) |
| 311 | { |
| 312 | XImage *image = 0; |
| 313 | png_structp png_ptr; |
| 314 | png_infop info_ptr; |
| 315 | png_infop end_info; |
| 316 | png_uint_32 width, height, channels; |
| 317 | int bit_depth, color_type, interlace_type; |
| 318 | FILE *fp = 0; |
| 319 | |
| 320 | png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, 0, 0, 0); |
| 321 | if (!png_ptr) return 0; |
| 322 | |
| 323 | info_ptr = png_create_info_struct (png_ptr); |
| 324 | if (!info_ptr) |
| 325 | { |
| 326 | png_destroy_read_struct (&png_ptr, 0, 0); |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | end_info = png_create_info_struct (png_ptr); |
| 331 | if (!end_info) |
| 332 | { |
| 333 | png_destroy_read_struct (&png_ptr, &info_ptr, 0); |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | if (setjmp (png_jmpbuf(png_ptr))) |
| 338 | { |
| 339 | png_destroy_read_struct (&png_ptr, &info_ptr, &end_info); |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | if (filename) |
| 344 | { |
| 345 | fp = fopen (filename, "r"); |
| 346 | if (! fp) |
| 347 | { |
| 348 | fprintf (stderr, "%s: unable to read %s\n", progname, filename); |
| 349 | return 0; |
| 350 | } |
| 351 | png_init_io (png_ptr, fp); |
| 352 | } |
| 353 | else |
| 354 | { |
| 355 | png_read_closure closure; |
| 356 | closure.buf = image_data; |
| 357 | closure.siz = data_size; |
| 358 | closure.ptr = 0; |
| 359 | png_set_read_fn (png_ptr, (void *) &closure, png_reader_fn); |
| 360 | } |
| 361 | |
| 362 | png_read_info (png_ptr, info_ptr); |
| 363 | png_get_IHDR (png_ptr, info_ptr, |
| 364 | &width, &height, &bit_depth, &color_type, |
| 365 | &interlace_type, 0, 0); |
| 366 | |
| 367 | png_set_strip_16 (png_ptr); /* Truncate 16 bits per component to 8 */ |
| 368 | png_set_packing (png_ptr); /* Unpack to 1 pixel per byte */ |
| 369 | |
| 370 | # if 0 |
| 371 | if (color_type == PNG_COLOR_TYPE_PALETTE) /* Colormap to RGB */ |
| 372 | png_set_palette_rgb (png_ptr); |
| 373 | |
| 374 | if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) /* Mono to 8bit */ |
| 375 | png_set_gray_1_2_4_to_8 (png_ptr); |
| 376 | # endif |
| 377 | |
| 378 | if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS)) /* Fix weird alpha */ |
| 379 | png_set_tRNS_to_alpha (png_ptr); |
| 380 | |
| 381 | /* At least 8 bits deep */ |
| 382 | if (color_type == PNG_COLOR_TYPE_PALETTE && bit_depth <= 8) |
| 383 | png_set_expand (png_ptr); |
| 384 | |
| 385 | if (bit_depth == 8 && /* Convert RGB to RGBA */ |
| 386 | (color_type == PNG_COLOR_TYPE_RGB || |
| 387 | color_type == PNG_COLOR_TYPE_PALETTE)) |
| 388 | png_set_filler (png_ptr, 0xFF, PNG_FILLER_AFTER); |
| 389 | |
| 390 | /* Grayscale to color */ |
| 391 | if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) |
| 392 | png_set_expand (png_ptr); |
| 393 | |
| 394 | |
| 395 | /* Convert graysale to color */ |
| 396 | if (color_type == PNG_COLOR_TYPE_GRAY || |
| 397 | color_type == PNG_COLOR_TYPE_GRAY_ALPHA) |
| 398 | png_set_gray_to_rgb (png_ptr); |
| 399 | |
| 400 | # if 0 |
| 401 | { |
| 402 | png_color_16 *bg; |
| 403 | if (png_get_bKGD (png_ptr, info_ptr, &bg)) |
| 404 | png_set_background (png_ptr, bg, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); |
| 405 | } |
| 406 | # endif |
| 407 | |
| 408 | /* Commit */ |
| 409 | png_read_update_info (png_ptr, info_ptr); |
| 410 | |
| 411 | channels = png_get_channels (png_ptr, info_ptr); |
| 412 | |
| 413 | { |
| 414 | png_bytep *rows = png_malloc (png_ptr, height * sizeof(*rows)); |
| 415 | int x, y; |
| 416 | for (y = 0; y < height; y++) |
| 417 | rows[y] = png_malloc (png_ptr, png_get_rowbytes (png_ptr, info_ptr)); |
| 418 | png_read_image (png_ptr, rows); |
| 419 | png_read_end (png_ptr, info_ptr); |
| 420 | |
| 421 | image = XCreateImage (dpy, visual, 32, ZPixmap, 0, 0, |
| 422 | width, height, 32, 0); |
| 423 | image->data = (char *) malloc (height * image->bytes_per_line); |
| 424 | |
| 425 | /* Set the bit order in the XImage structure to whatever the |
| 426 | local host's native bit order is. |
| 427 | */ |
| 428 | image->bitmap_bit_order = |
| 429 | image->byte_order = |
| 430 | (bigendian() ? MSBFirst : LSBFirst); |
| 431 | |
| 432 | if (!image->data) |
| 433 | { |
| 434 | fprintf (stderr, "%s: out of memory (%lu x %lu)\n", |
| 435 | progname, (unsigned long)width, (unsigned long)height); |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | for (y = 0; y < height; y++) |
| 440 | { |
| 441 | png_bytep i = rows[y]; |
| 442 | for (x = 0; x < width; x++) |
| 443 | { |
| 444 | unsigned long rgba; |
| 445 | switch (channels) { |
| 446 | case 4: |
| 447 | rgba = ((i[3] << 24) | |
| 448 | (i[2] << 16) | |
| 449 | (i[1] << 8) | |
| 450 | i[0]); |
| 451 | break; |
| 452 | case 3: |
| 453 | rgba = ((0xFF << 24) | |
| 454 | (i[2] << 16) | |
| 455 | (i[1] << 8) | |
| 456 | i[0]); |
| 457 | break; |
| 458 | case 2: |
| 459 | rgba = ((i[1] << 24) | |
| 460 | (i[0] << 16) | |
| 461 | (i[0] << 8) | |
| 462 | i[0]); |
| 463 | break; |
| 464 | case 1: |
| 465 | rgba = ((0xFF << 24) | |
| 466 | (i[0] << 16) | |
| 467 | (i[0] << 8) | |
| 468 | i[0]); |
| 469 | break; |
| 470 | default: |
| 471 | abort(); |
| 472 | } |
| 473 | XPutPixel (image, x, y, rgba); |
| 474 | i += channels; |
| 475 | } |
| 476 | png_free (png_ptr, rows[y]); |
| 477 | } |
| 478 | |
| 479 | png_free (png_ptr, rows); |
| 480 | } |
| 481 | |
| 482 | png_destroy_read_struct (&png_ptr, &info_ptr, &end_info); |
| 483 | if (fp) fclose (fp); |
| 484 | |
| 485 | return image; |
| 486 | } |
| 487 | |
| 488 | |
| 489 | #else /* No image loaders! */ |
| 490 | |
| 491 | static XImage * |
| 492 | make_ximage (Display *dpy, Visual *visual, |
| 493 | const char *filename, const unsigned char *image_data, |
| 494 | unsigned long data_size) |
| 495 | { |
| 496 | fprintf (stderr, "%s: no image loading support!\n", progname); |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | #endif /* no loaders */ |
| 501 | |
| 502 | |
| 503 | /* Given a bitmask, returns the position and width of the field. |
| 504 | */ |
| 505 | static void |
| 506 | decode_mask (unsigned long mask, unsigned long *pos_ret, |
| 507 | unsigned long *size_ret) |
| 508 | { |
| 509 | int i; |
| 510 | for (i = 0; i < 32; i++) |
| 511 | if (mask & (1L << i)) |
| 512 | { |
| 513 | int j = 0; |
| 514 | *pos_ret = i; |
| 515 | for (; i < 32; i++, j++) |
| 516 | if (! (mask & (1L << i))) |
| 517 | break; |
| 518 | *size_ret = j; |
| 519 | return; |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | |
| 524 | /* Loads the image to a Pixmap and optional 1-bit mask. |
| 525 | */ |
| 526 | static Pixmap |
| 527 | make_pixmap (Display *dpy, Window window, |
| 528 | const char *filename, |
| 529 | const unsigned char *image_data, unsigned long data_size, |
| 530 | int *width_ret, int *height_ret, Pixmap *mask_ret) |
| 531 | { |
| 532 | XWindowAttributes xgwa; |
| 533 | XImage *in, *out, *mask = 0; |
| 534 | Pixmap pixmap; |
| 535 | XGCValues gcv; |
| 536 | GC gc; |
| 537 | int x, y; |
| 538 | |
| 539 | unsigned long crpos=0, cgpos=0, cbpos=0, capos=0; /* bitfield positions */ |
| 540 | unsigned long srpos=0, sgpos=0, sbpos=0; |
| 541 | unsigned long srmsk=0, sgmsk=0, sbmsk=0; |
| 542 | unsigned long srsiz=0, sgsiz=0, sbsiz=0; |
| 543 | |
| 544 | # ifdef HAVE_JWXYZ |
| 545 | // BlackPixel has alpha: 0xFF000000. |
| 546 | unsigned long black = BlackPixelOfScreen (DefaultScreenOfDisplay (dpy)); |
| 547 | #else |
| 548 | unsigned long black = 0; |
| 549 | # endif |
| 550 | |
| 551 | XGetWindowAttributes (dpy, window, &xgwa); |
| 552 | |
| 553 | in = make_ximage (dpy, xgwa.visual, filename, image_data, data_size); |
| 554 | if (!in) return 0; |
| 555 | |
| 556 | /* Create a new image in the depth and bit-order of the server. */ |
| 557 | out = XCreateImage (dpy, xgwa.visual, xgwa.depth, ZPixmap, 0, 0, |
| 558 | in->width, in->height, 8, 0); |
| 559 | |
| 560 | out->bitmap_bit_order = in->bitmap_bit_order; |
| 561 | out->byte_order = in->byte_order; |
| 562 | |
| 563 | out->bitmap_bit_order = BitmapBitOrder (dpy); |
| 564 | out->byte_order = ImageByteOrder (dpy); |
| 565 | |
| 566 | out->data = (char *) malloc (out->height * out->bytes_per_line); |
| 567 | if (!out->data) abort(); |
| 568 | |
| 569 | if (mask_ret) |
| 570 | { |
| 571 | mask = XCreateImage (dpy, xgwa.visual, 1, XYPixmap, 0, 0, |
| 572 | in->width, in->height, 8, 0); |
| 573 | mask->byte_order = in->byte_order; |
| 574 | mask->data = (char *) malloc (mask->height * mask->bytes_per_line); |
| 575 | } |
| 576 | |
| 577 | /* Find the server's color masks. |
| 578 | */ |
| 579 | srmsk = out->red_mask; |
| 580 | sgmsk = out->green_mask; |
| 581 | sbmsk = out->blue_mask; |
| 582 | |
| 583 | if (!(srmsk && sgmsk && sbmsk)) abort(); /* No server color masks? */ |
| 584 | |
| 585 | decode_mask (srmsk, &srpos, &srsiz); |
| 586 | decode_mask (sgmsk, &sgpos, &sgsiz); |
| 587 | decode_mask (sbmsk, &sbpos, &sbsiz); |
| 588 | |
| 589 | /* 'in' is RGBA in client endianness. Convert to what the server wants. */ |
| 590 | if (bigendian()) |
| 591 | crpos = 24, cgpos = 16, cbpos = 8, capos = 0; |
| 592 | else |
| 593 | crpos = 0, cgpos = 8, cbpos = 16, capos = 24; |
| 594 | |
| 595 | for (y = 0; y < in->height; y++) |
| 596 | for (x = 0; x < in->width; x++) |
| 597 | { |
| 598 | unsigned long p = XGetPixel (in, x, y); |
| 599 | unsigned char a = (p >> capos) & 0xFF; |
| 600 | unsigned char b = (p >> cbpos) & 0xFF; |
| 601 | unsigned char g = (p >> cgpos) & 0xFF; |
| 602 | unsigned char r = (p >> crpos) & 0xFF; |
| 603 | XPutPixel (out, x, y, ((r << srpos) | |
| 604 | (g << sgpos) | |
| 605 | (b << sbpos) | |
| 606 | black)); |
| 607 | if (mask) |
| 608 | XPutPixel (mask, x, y, (a ? 1 : 0)); |
| 609 | } |
| 610 | |
| 611 | XDestroyImage (in); |
| 612 | in = 0; |
| 613 | |
| 614 | pixmap = XCreatePixmap (dpy, window, out->width, out->height, xgwa.depth); |
| 615 | gc = XCreateGC (dpy, pixmap, 0, &gcv); |
| 616 | XPutImage (dpy, pixmap, gc, out, 0, 0, 0, 0, out->width, out->height); |
| 617 | XFreeGC (dpy, gc); |
| 618 | |
| 619 | if (mask) |
| 620 | { |
| 621 | Pixmap p2 = XCreatePixmap (dpy, window, mask->width, mask->height, 1); |
| 622 | gcv.foreground = 1; |
| 623 | gcv.background = 0; |
| 624 | gc = XCreateGC (dpy, p2, GCForeground|GCBackground, &gcv); |
| 625 | XPutImage (dpy, p2, gc, mask, 0, 0, 0, 0, mask->width, mask->height); |
| 626 | XFreeGC (dpy, gc); |
| 627 | XDestroyImage (mask); |
| 628 | mask = 0; |
| 629 | *mask_ret = p2; |
| 630 | } |
| 631 | |
| 632 | if (width_ret) *width_ret = out->width; |
| 633 | if (height_ret) *height_ret = out->height; |
| 634 | |
| 635 | XDestroyImage (out); |
| 636 | |
| 637 | return pixmap; |
| 638 | } |
| 639 | |
| 640 | |
| 641 | /* Textures are upside down, so invert XImages before returning them. |
| 642 | */ |
| 643 | static void |
| 644 | flip_ximage (XImage *ximage) |
| 645 | { |
| 646 | char *data2, *in, *out; |
| 647 | int y; |
| 648 | |
| 649 | if (!ximage) return; |
| 650 | data2 = malloc (ximage->bytes_per_line * ximage->height); |
| 651 | if (!data2) abort(); |
| 652 | in = ximage->data; |
| 653 | out = data2 + ximage->bytes_per_line * (ximage->height - 1); |
| 654 | for (y = 0; y < ximage->height; y++) |
| 655 | { |
| 656 | memcpy (out, in, ximage->bytes_per_line); |
| 657 | in += ximage->bytes_per_line; |
| 658 | out -= ximage->bytes_per_line; |
| 659 | } |
| 660 | free (ximage->data); |
| 661 | ximage->data = data2; |
| 662 | } |
| 663 | |
| 664 | |
| 665 | Pixmap |
| 666 | image_data_to_pixmap (Display *dpy, Window window, |
| 667 | const unsigned char *image_data, unsigned long data_size, |
| 668 | int *width_ret, int *height_ret, |
| 669 | Pixmap *mask_ret) |
| 670 | { |
| 671 | return make_pixmap (dpy, window, 0, image_data, data_size, |
| 672 | width_ret, height_ret, mask_ret); |
| 673 | } |
| 674 | |
| 675 | Pixmap |
| 676 | file_to_pixmap (Display *dpy, Window window, const char *filename, |
| 677 | int *width_ret, int *height_ret, |
| 678 | Pixmap *mask_ret) |
| 679 | { |
| 680 | return make_pixmap (dpy, window, filename, 0, 0, |
| 681 | width_ret, height_ret, mask_ret); |
| 682 | } |
| 683 | |
| 684 | |
| 685 | /* This XImage has RGBA data, which is what OpenGL code typically expects. |
| 686 | Also it is upside down: the origin is at the bottom left of the image. |
| 687 | X11 typically expects 0RGB as it has no notion of alpha, only 1-bit masks. |
| 688 | With X11 code, you should probably use the _pixmap routines instead. |
| 689 | */ |
| 690 | XImage * |
| 691 | image_data_to_ximage (Display *dpy, Visual *visual, |
| 692 | const unsigned char *image_data, |
| 693 | unsigned long data_size) |
| 694 | { |
| 695 | XImage *ximage = make_ximage (dpy, visual, 0, image_data, data_size); |
| 696 | flip_ximage (ximage); |
| 697 | return ximage; |
| 698 | } |
| 699 | |
| 700 | XImage * |
| 701 | file_to_ximage (Display *dpy, Visual *visual, const char *filename) |
| 702 | { |
| 703 | XImage *ximage = make_ximage (dpy, visual, filename, 0, 0); |
| 704 | flip_ximage (ximage); |
| 705 | return ximage; |
| 706 | } |