Mercurial > hg > xemacs-beta
annotate src/glyphs-eimage.c @ 4505:a5f1da0eb001
Document XFT support in the FAQ, better describe XEmacs pronunciation.
2008-08-31 Aidan Kehoe <kehoea@parhasard.net>
* xemacs-faq.texi (Q5.0.7): Add a section on how one can use
antialiased fonts under X11; thank you Giacomo Boffi.
(Q1.0.3): Clarify pronunciation using a serious phonetic
alphabet.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sun, 31 Aug 2008 13:53:36 +0200 |
| parents | a5ff7e67ac1b |
| children | 6c6bfdb80a0c |
| rev | line source |
|---|---|
| 428 | 1 /* EImage-specific Lisp objects. |
| 2 Copyright (C) 1993, 1994, 1998 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Board of Trustees, University of Illinois. | |
| 4 Copyright (C) 1995 Tinker Systems | |
| 2959 | 5 Copyright (C) 1995, 1996, 2001, 2002, 2004, 2005 Ben Wing |
| 428 | 6 Copyright (C) 1995 Sun Microsystems |
| 7 | |
| 8 This file is part of XEmacs. | |
| 9 | |
| 10 XEmacs is free software; you can redistribute it and/or modify it | |
| 11 under the terms of the GNU General Public License as published by the | |
| 12 Free Software Foundation; either version 2, or (at your option) any | |
| 13 later version. | |
| 14 | |
| 15 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 18 for more details. | |
| 19 | |
| 20 You should have received a copy of the GNU General Public License | |
| 21 along with XEmacs; see the file COPYING. If not, write to | |
| 22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 23 Boston, MA 02111-1307, USA. */ | |
| 24 | |
| 25 /* Synched up with: Not in FSF. */ | |
| 26 | |
| 2959 | 27 /* Originally part of glyphs.c. |
| 28 | |
| 428 | 29 GIF/JPEG support added by Ben Wing for 19.14 |
| 30 PNG support added by Bill Perry for 19.14 | |
| 31 Improved GIF/JPEG support added by Bill Perry for 19.14 | |
| 32 Cleanup/simplification of error handling by Ben Wing for 19.14 | |
| 33 GIF support changed to external Gifreader lib by Jareth Hein for 21.0 | |
| 34 Many changes for color work and optimizations by Jareth Hein for 21.0 | |
| 35 Switch of GIF/JPEG/PNG to new EImage intermediate code by Jareth Hein for 21.0 | |
| 36 TIFF code by Jareth Hein for 21.0 | |
| 37 TODO: | |
| 38 Convert images.el to C and stick it in here? | |
| 3094 | 39 This file is really repetitious; can we refactor? |
| 428 | 40 */ |
| 41 | |
| 42 #include <config.h> | |
| 43 #include "lisp.h" | |
| 44 #include "lstream.h" | |
| 45 #include "console.h" | |
| 872 | 46 #include "device-impl.h" |
| 428 | 47 #include "faces.h" |
| 48 #include "glyphs.h" | |
| 872 | 49 #include "objects-impl.h" |
| 428 | 50 |
| 51 #include "buffer.h" | |
| 52 #include "frame.h" | |
| 53 #include "opaque.h" | |
| 442 | 54 #include "window.h" |
| 428 | 55 |
| 56 #include "sysfile.h" | |
| 57 | |
| 58 #ifdef HAVE_PNG | |
| 1743 | 59 |
| 60 BEGIN_C_DECLS | |
| 61 | |
| 647 | 62 #define message message_ /* Yuck */ |
| 428 | 63 #include <png.h> |
| 647 | 64 #undef message |
| 1743 | 65 |
| 66 END_C_DECLS | |
| 67 | |
| 428 | 68 #else |
| 69 #include <setjmp.h> | |
| 70 #endif | |
| 71 #include "file-coding.h" | |
| 72 | |
| 73 #ifdef HAVE_TIFF | |
| 74 DEFINE_IMAGE_INSTANTIATOR_FORMAT (tiff); | |
| 75 Lisp_Object Qtiff; | |
| 76 #endif | |
| 77 | |
| 78 #ifdef HAVE_JPEG | |
| 79 DEFINE_IMAGE_INSTANTIATOR_FORMAT (jpeg); | |
| 80 Lisp_Object Qjpeg; | |
| 81 #endif | |
| 82 | |
| 83 #ifdef HAVE_GIF | |
| 84 DEFINE_IMAGE_INSTANTIATOR_FORMAT (gif); | |
| 85 Lisp_Object Qgif; | |
| 86 #endif | |
| 87 | |
| 88 #ifdef HAVE_PNG | |
| 89 DEFINE_IMAGE_INSTANTIATOR_FORMAT (png); | |
| 90 Lisp_Object Qpng; | |
| 91 #endif | |
| 92 | |
| 93 | |
| 94 #ifdef HAVE_JPEG | |
| 95 | |
| 96 /********************************************************************** | |
| 97 * JPEG * | |
| 98 **********************************************************************/ | |
| 99 | |
| 1743 | 100 BEGIN_C_DECLS |
| 101 | |
| 2500 | 102 #ifdef WIN32_NATIVE |
| 2563 | 103 /* #### Yuck! More horrifitude. tiffio.h, below, includes <windows.h>, |
| 104 which defines INT32 and INT16, the former differently and incompatibly | |
| 105 from jmorecfg.h, included by jpeglib.h. We can disable the stuff in | |
| 106 jmorecfg.h by defining XMD_H (clever, huh?); then we define these | |
| 107 typedefs the way that <windows.h> wants them (which is more correct, | |
| 108 anyway; jmorecfg.h defines INT32 as `long'). */ | |
| 2500 | 109 #define XMD_H |
| 110 typedef signed int INT32; | |
| 111 typedef signed short INT16; | |
|
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112 |
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113 /* And another one... jmorecfg.h defines the 'boolean' type as int, |
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114 which conflicts with the standard Windows 'boolean' definition as |
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115 unsigned char. Ref: http://www.asmail.be/msg0054688232.html */ |
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116 #ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */ |
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117 typedef unsigned char boolean; |
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parents:
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118 #endif |
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Aidan Kehoe <kehoea@parhasard.net>
parents:
3839
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changeset
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119 #define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */ |
| 2500 | 120 #endif |
| 121 | |
| 428 | 122 #include <jpeglib.h> |
| 123 #include <jerror.h> | |
| 1743 | 124 |
| 125 END_C_DECLS | |
| 428 | 126 |
| 127 /*#define USE_TEMP_FILES_FOR_JPEG_IMAGES 1*/ | |
| 128 static void | |
| 129 jpeg_validate (Lisp_Object instantiator) | |
| 130 { | |
| 131 file_or_data_must_be_present (instantiator); | |
| 132 } | |
| 133 | |
| 134 static Lisp_Object | |
| 442 | 135 jpeg_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 136 Lisp_Object UNUSED (dest_mask)) |
| 428 | 137 { |
| 138 return simple_image_type_normalize (inst, console_type, Qjpeg); | |
| 139 } | |
| 140 | |
| 141 static int | |
| 142 jpeg_possible_dest_types (void) | |
| 143 { | |
| 144 return IMAGE_COLOR_PIXMAP_MASK; | |
| 145 } | |
| 146 | |
| 147 /* To survive the otherwise baffling complexity of making sure | |
| 148 everything gets cleaned up in the presence of an error, we | |
| 149 use an unwind_protect(). */ | |
| 150 | |
| 151 struct jpeg_unwind_data | |
| 152 { | |
| 153 /* Stream that we need to close */ | |
| 154 FILE *instream; | |
| 155 /* Object that holds state info for JPEG decoding */ | |
| 156 struct jpeg_decompress_struct *cinfo_ptr; | |
| 157 /* EImage data */ | |
| 2367 | 158 Binbyte *eimage; |
| 428 | 159 }; |
| 160 | |
| 161 static Lisp_Object | |
| 162 jpeg_instantiate_unwind (Lisp_Object unwind_obj) | |
| 163 { | |
| 164 struct jpeg_unwind_data *data = | |
| 165 (struct jpeg_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 166 | |
| 167 free_opaque_ptr (unwind_obj); | |
| 168 if (data->cinfo_ptr) | |
| 169 jpeg_destroy_decompress (data->cinfo_ptr); | |
| 170 | |
| 171 if (data->instream) | |
| 771 | 172 retry_fclose (data->instream); |
| 428 | 173 |
| 1726 | 174 if (data->eimage) |
| 2367 | 175 xfree (data->eimage, Binbyte *); |
| 428 | 176 |
| 177 return Qnil; | |
| 178 } | |
| 179 | |
| 180 /* | |
| 181 * ERROR HANDLING: | |
| 182 * | |
| 183 * The JPEG library's standard error handler (jerror.c) is divided into | |
| 184 * several "methods" which you can override individually. This lets you | |
| 185 * adjust the behavior without duplicating a lot of code, which you might | |
| 186 * have to update with each future release. | |
| 187 * | |
| 188 * Our example here shows how to override the "error_exit" method so that | |
| 189 * control is returned to the library's caller when a fatal error occurs, | |
| 190 * rather than calling exit() as the standard error_exit method does. | |
| 191 * | |
| 192 * We use C's setjmp/longjmp facility to return control. This means that the | |
| 193 * routine which calls the JPEG library must first execute a setjmp() call to | |
| 194 * establish the return point. We want the replacement error_exit to do a | |
| 195 * longjmp(). But we need to make the setjmp buffer accessible to the | |
| 196 * error_exit routine. To do this, we make a private extension of the | |
| 197 * standard JPEG error handler object. (If we were using C++, we'd say we | |
| 198 * were making a subclass of the regular error handler.) | |
| 199 * | |
| 200 * Here's the extended error handler struct: | |
| 201 */ | |
| 202 | |
| 203 struct my_jpeg_error_mgr | |
| 204 { | |
| 205 struct jpeg_error_mgr pub; /* "public" fields */ | |
| 206 jmp_buf setjmp_buffer; /* for return to caller */ | |
| 207 }; | |
| 208 | |
| 209 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 210 METHODDEF(void) | |
| 211 #else | |
| 212 METHODDEF void | |
| 213 #endif | |
| 2286 | 214 our_init_source (j_decompress_ptr UNUSED (cinfo)) |
| 428 | 215 { |
| 216 } | |
| 217 | |
| 218 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 219 METHODDEF(boolean) | |
| 220 #else | |
| 221 METHODDEF boolean | |
| 222 #endif | |
| 223 our_fill_input_buffer (j_decompress_ptr cinfo) | |
| 224 { | |
| 225 /* Insert a fake EOI marker */ | |
| 226 struct jpeg_source_mgr *src = cinfo->src; | |
| 227 static JOCTET buffer[2]; | |
| 228 | |
| 229 buffer[0] = (JOCTET) 0xFF; | |
| 230 buffer[1] = (JOCTET) JPEG_EOI; | |
| 231 | |
| 232 src->next_input_byte = buffer; | |
| 233 src->bytes_in_buffer = 2; | |
| 234 return TRUE; | |
| 235 } | |
| 236 | |
| 237 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 238 METHODDEF(void) | |
| 239 #else | |
| 240 METHODDEF void | |
| 241 #endif | |
| 242 our_skip_input_data (j_decompress_ptr cinfo, long num_bytes) | |
| 243 { | |
| 244 struct jpeg_source_mgr *src = NULL; | |
| 245 | |
| 246 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 247 | |
| 248 if (!src) | |
| 647 | 249 return; |
| 250 else if (num_bytes > (long) src->bytes_in_buffer) | |
| 428 | 251 { |
| 647 | 252 ERREXIT (cinfo, JERR_INPUT_EOF); |
| 253 /*NOTREACHED*/ | |
| 254 } | |
| 428 | 255 |
| 256 src->bytes_in_buffer -= num_bytes; | |
| 257 src->next_input_byte += num_bytes; | |
| 258 } | |
| 259 | |
| 260 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 261 METHODDEF(void) | |
| 262 #else | |
| 263 METHODDEF void | |
| 264 #endif | |
| 2286 | 265 our_term_source (j_decompress_ptr UNUSED (cinfo)) |
| 428 | 266 { |
| 267 } | |
| 268 | |
| 269 typedef struct | |
| 270 { | |
| 271 struct jpeg_source_mgr pub; | |
| 272 } our_jpeg_source_mgr; | |
| 273 | |
| 274 static void | |
| 665 | 275 jpeg_memory_src (j_decompress_ptr cinfo, JOCTET *data, Bytecount len) |
| 428 | 276 { |
| 277 struct jpeg_source_mgr *src; | |
| 278 | |
| 279 if (cinfo->src == NULL) | |
| 280 { /* first time for this JPEG object? */ | |
| 281 cinfo->src = (struct jpeg_source_mgr *) | |
| 282 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, | |
| 283 sizeof(our_jpeg_source_mgr)); | |
| 284 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 285 src->next_input_byte = data; | |
| 286 } | |
| 287 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 288 src->init_source = our_init_source; | |
| 289 src->fill_input_buffer = our_fill_input_buffer; | |
| 290 src->skip_input_data = our_skip_input_data; | |
| 291 src->resync_to_restart = jpeg_resync_to_restart; /* use default method */ | |
| 292 src->term_source = our_term_source; | |
| 293 src->bytes_in_buffer = len; | |
| 294 src->next_input_byte = data; | |
| 295 } | |
| 296 | |
| 297 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 298 METHODDEF(void) | |
| 299 #else | |
| 300 METHODDEF void | |
| 301 #endif | |
| 302 my_jpeg_error_exit (j_common_ptr cinfo) | |
| 303 { | |
| 304 /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ | |
| 305 struct my_jpeg_error_mgr *myerr = (struct my_jpeg_error_mgr *) cinfo->err; | |
| 306 | |
| 307 /* Return control to the setjmp point */ | |
| 308 longjmp (myerr->setjmp_buffer, 1); | |
| 309 } | |
| 310 | |
| 311 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 312 METHODDEF(void) | |
| 313 #else | |
| 314 METHODDEF void | |
| 315 #endif | |
| 316 my_jpeg_output_message (j_common_ptr cinfo) | |
| 317 { | |
| 771 | 318 Extbyte buffer[JMSG_LENGTH_MAX]; |
| 867 | 319 Ibyte *intbuf; |
| 428 | 320 |
| 321 /* Create the message */ | |
| 322 (*cinfo->err->format_message) (cinfo, buffer); | |
| 771 | 323 EXTERNAL_TO_C_STRING (buffer, intbuf, Qnative); |
| 324 warn_when_safe (Qjpeg, Qinfo, "%s", intbuf); | |
| 428 | 325 } |
| 326 | |
| 327 /* The code in this routine is based on example.c from the JPEG library | |
| 328 source code and from gif_instantiate() */ | |
| 329 static void | |
| 330 jpeg_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 331 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 332 int dest_mask, Lisp_Object domain) |
| 333 { | |
| 440 | 334 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 335 /* It is OK for the unwind data to be local to this function, |
| 336 because the unwind-protect is always executed when this | |
| 337 stack frame is still valid. */ | |
| 338 struct jpeg_unwind_data unwind; | |
| 339 int speccount = specpdl_depth (); | |
| 340 | |
| 341 /* This struct contains the JPEG decompression parameters and pointers to | |
| 342 * working space (which is allocated as needed by the JPEG library). | |
| 343 */ | |
| 344 struct jpeg_decompress_struct cinfo; | |
| 345 /* We use our private extension JPEG error handler. | |
| 346 * Note that this struct must live as long as the main JPEG parameter | |
| 347 * struct, to avoid dangling-pointer problems. | |
| 348 */ | |
| 349 struct my_jpeg_error_mgr jerr; | |
| 350 | |
| 351 /* Step -1: First record our unwind-protect, which will clean up after | |
| 352 any exit, normal or not */ | |
| 353 | |
| 354 xzero (unwind); | |
| 355 record_unwind_protect (jpeg_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 356 | |
| 357 /* Step 1: allocate and initialize JPEG decompression object */ | |
| 358 | |
| 359 /* We set up the normal JPEG error routines, then override error_exit. */ | |
| 360 cinfo.err = jpeg_std_error (&jerr.pub); | |
| 361 jerr.pub.error_exit = my_jpeg_error_exit; | |
| 362 jerr.pub.output_message = my_jpeg_output_message; | |
| 363 | |
| 364 /* Establish the setjmp return context for my_error_exit to use. */ | |
| 365 if (setjmp (jerr.setjmp_buffer)) | |
| 366 { | |
| 367 /* If we get here, the JPEG code has signaled an error. | |
| 368 * We need to clean up the JPEG object, close the input file, and return. | |
| 369 */ | |
| 370 | |
| 371 { | |
| 372 Lisp_Object errstring; | |
| 771 | 373 Extbyte buffer[JMSG_LENGTH_MAX]; |
| 428 | 374 |
| 375 /* Create the message */ | |
| 376 (*cinfo.err->format_message) ((j_common_ptr) &cinfo, buffer); | |
| 771 | 377 errstring = build_ext_string (buffer, Qnative); |
| 428 | 378 |
| 379 signal_image_error_2 ("JPEG decoding error", | |
| 380 errstring, instantiator); | |
| 381 } | |
| 382 } | |
| 383 | |
| 384 /* Now we can initialize the JPEG decompression object. */ | |
| 385 jpeg_create_decompress (&cinfo); | |
| 386 unwind.cinfo_ptr = &cinfo; | |
| 387 | |
| 388 /* Step 2: specify data source (eg, a file) */ | |
| 389 | |
| 390 { | |
| 391 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 392 const Binbyte *bytes; |
| 665 | 393 Bytecount len; |
| 428 | 394 |
| 395 /* #### This is a definite problem under Mule due to the amount of | |
| 396 stack data it might allocate. Need to be able to convert and | |
| 397 write out to a file. */ | |
| 440 | 398 TO_EXTERNAL_FORMAT (LISP_STRING, data, ALLOCA, (bytes, len), Qbinary); |
| 428 | 399 jpeg_memory_src (&cinfo, (JOCTET *) bytes, len); |
| 400 } | |
| 401 | |
| 402 /* Step 3: read file parameters with jpeg_read_header() */ | |
| 403 | |
| 404 jpeg_read_header (&cinfo, TRUE); | |
| 405 /* We can ignore the return value from jpeg_read_header since | |
| 406 * (a) suspension is not possible with the stdio data source, and | |
| 407 * (b) we passed TRUE to reject a tables-only JPEG file as an error. | |
| 408 * See libjpeg.doc for more info. | |
| 409 */ | |
| 410 | |
| 411 { | |
| 412 int jpeg_gray = 0; /* if we're dealing with a grayscale */ | |
| 413 /* Step 4: set parameters for decompression. */ | |
| 414 | |
| 415 /* Now that we're using EImages, send all data as 24bit color. | |
| 416 The backend routine will take care of any necessary reductions. | |
| 417 We do have to handle the grayscale case ourselves, however. */ | |
| 418 if (cinfo.jpeg_color_space == JCS_GRAYSCALE) | |
| 419 { | |
| 420 cinfo.out_color_space = JCS_GRAYSCALE; | |
| 421 jpeg_gray = 1; | |
| 422 } | |
| 423 else | |
| 424 { | |
| 425 /* we're relying on the jpeg driver to do any other conversions, | |
| 426 or signal an error if the conversion isn't supported. */ | |
| 427 cinfo.out_color_space = JCS_RGB; | |
| 428 } | |
| 429 | |
| 430 /* Step 5: Start decompressor */ | |
| 431 jpeg_start_decompress (&cinfo); | |
| 432 | |
| 433 /* Step 6: Read in the data and put into EImage format (8bit RGB triples)*/ | |
| 434 | |
| 2367 | 435 unwind.eimage = |
| 436 xnew_binbytes (cinfo.output_width * cinfo.output_height * 3); | |
| 428 | 437 if (!unwind.eimage) |
| 438 signal_image_error("Unable to allocate enough memory for image", instantiator); | |
| 439 | |
| 440 { | |
| 441 JSAMPARRAY row_buffer; /* Output row buffer */ | |
| 442 JSAMPLE *jp; | |
| 443 int row_stride; /* physical row width in output buffer */ | |
| 2367 | 444 Binbyte *op = unwind.eimage; |
| 428 | 445 |
| 446 /* We may need to do some setup of our own at this point before reading | |
| 447 * the data. After jpeg_start_decompress() we have the correct scaled | |
| 448 * output image dimensions available | |
| 449 * We need to make an output work buffer of the right size. | |
| 450 */ | |
| 451 /* JSAMPLEs per row in output buffer. */ | |
| 452 row_stride = cinfo.output_width * cinfo.output_components; | |
| 453 /* Make a one-row-high sample array that will go away when done | |
| 454 with image */ | |
| 455 row_buffer = ((*cinfo.mem->alloc_sarray) | |
| 456 ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1)); | |
| 457 | |
| 458 /* Here we use the library's state variable cinfo.output_scanline as the | |
| 459 * loop counter, so that we don't have to keep track ourselves. | |
| 460 */ | |
| 461 while (cinfo.output_scanline < cinfo.output_height) | |
| 462 { | |
| 463 int i; | |
| 464 | |
| 465 /* jpeg_read_scanlines expects an array of pointers to scanlines. | |
| 466 * Here the array is only one element long, but you could ask for | |
| 467 * more than one scanline at a time if that's more convenient. | |
| 468 */ | |
| 469 (void) jpeg_read_scanlines (&cinfo, row_buffer, 1); | |
| 470 jp = row_buffer[0]; | |
| 647 | 471 for (i = 0; i < (int) cinfo.output_width; i++) |
| 428 | 472 { |
| 473 int clr; | |
| 474 if (jpeg_gray) | |
| 475 { | |
| 2367 | 476 Binbyte val; |
| 428 | 477 #if (BITS_IN_JSAMPLE == 8) |
| 2367 | 478 val = (Binbyte) *jp++; |
| 428 | 479 #else /* other option is 12 */ |
| 2367 | 480 val = (Binbyte) (*jp++ >> 4); |
| 428 | 481 #endif |
| 482 for (clr = 0; clr < 3; clr++) /* copy the same value into RGB */ | |
| 483 *op++ = val; | |
| 484 } | |
| 485 else | |
| 486 { | |
| 487 for (clr = 0; clr < 3; clr++) | |
| 488 #if (BITS_IN_JSAMPLE == 8) | |
| 2367 | 489 *op++ = (Binbyte)*jp++; |
| 428 | 490 #else /* other option is 12 */ |
| 2367 | 491 *op++ = (Binbyte)(*jp++ >> 4); |
| 428 | 492 #endif |
| 493 } | |
| 494 } | |
| 495 } | |
| 496 } | |
| 497 } | |
| 498 | |
| 499 /* Step 6.5: Create the pixmap and set up the image instance */ | |
| 500 /* now instantiate */ | |
| 442 | 501 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 502 init_image_instance_from_eimage, |
| 503 (ii, cinfo.output_width, cinfo.output_height, 1, | |
| 504 unwind.eimage, dest_mask, | |
| 2959 | 505 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 506 |
| 507 /* Step 7: Finish decompression */ | |
| 508 | |
| 509 jpeg_finish_decompress (&cinfo); | |
| 510 /* We can ignore the return value since suspension is not possible | |
| 511 * with the stdio data source. | |
| 512 */ | |
| 513 | |
| 514 /* And we're done! */ | |
| 515 /* This will clean up everything else. */ | |
| 771 | 516 unbind_to (speccount); |
| 428 | 517 } |
| 518 | |
| 519 #endif /* HAVE_JPEG */ | |
| 520 | |
| 521 #ifdef HAVE_GIF | |
| 522 /********************************************************************** | |
| 523 * GIF * | |
| 524 **********************************************************************/ | |
| 525 | |
| 526 #include "gifrlib.h" | |
| 527 | |
| 528 static void | |
| 529 gif_validate (Lisp_Object instantiator) | |
| 530 { | |
| 531 file_or_data_must_be_present (instantiator); | |
| 532 } | |
| 533 | |
| 534 static Lisp_Object | |
| 442 | 535 gif_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 536 Lisp_Object UNUSED (dest_mask)) |
| 428 | 537 { |
| 538 return simple_image_type_normalize (inst, console_type, Qgif); | |
| 539 } | |
| 540 | |
| 541 static int | |
| 542 gif_possible_dest_types (void) | |
| 543 { | |
| 544 return IMAGE_COLOR_PIXMAP_MASK; | |
| 545 } | |
| 546 | |
| 547 /* To survive the otherwise baffling complexity of making sure | |
| 548 everything gets cleaned up in the presence of an error, we | |
| 549 use an unwind_protect(). */ | |
| 550 | |
| 551 struct gif_unwind_data | |
| 552 { | |
| 2367 | 553 Binbyte *eimage; |
| 428 | 554 /* Object that holds the decoded data from a GIF file */ |
| 555 GifFileType *giffile; | |
| 556 }; | |
| 557 | |
| 558 static Lisp_Object | |
| 559 gif_instantiate_unwind (Lisp_Object unwind_obj) | |
| 560 { | |
| 561 struct gif_unwind_data *data = | |
| 562 (struct gif_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 563 | |
| 564 free_opaque_ptr (unwind_obj); | |
| 565 if (data->giffile) | |
| 566 { | |
| 567 DGifCloseFile (data->giffile); | |
| 568 GifFree(data->giffile); | |
| 569 } | |
| 647 | 570 if (data->eimage) |
| 2367 | 571 xfree (data->eimage, Binbyte *); |
| 428 | 572 |
| 573 return Qnil; | |
| 574 } | |
| 575 | |
| 576 typedef struct gif_memory_storage | |
| 577 { | |
| 2367 | 578 Binbyte *bytes; /* The data */ |
| 665 | 579 Bytecount len; /* How big is it? */ |
| 580 Bytecount index; /* Where are we? */ | |
| 428 | 581 } gif_memory_storage; |
| 582 | |
| 665 | 583 static Bytecount |
| 584 gif_read_from_memory (GifByteType *buf, Bytecount size, VoidPtr data) | |
| 428 | 585 { |
| 647 | 586 gif_memory_storage *mem = (gif_memory_storage *) data; |
| 428 | 587 |
| 588 if (size > (mem->len - mem->index)) | |
| 647 | 589 return -1; |
| 590 memcpy (buf, mem->bytes + mem->index, size); | |
| 428 | 591 mem->index = mem->index + size; |
| 592 return size; | |
| 593 } | |
| 594 | |
| 595 static int | |
| 2286 | 596 gif_memory_close (VoidPtr UNUSED (data)) |
| 428 | 597 { |
| 598 return 0; | |
| 599 } | |
| 600 | |
| 601 struct gif_error_struct | |
| 602 { | |
| 771 | 603 const Extbyte *err_str; /* return the error string */ |
| 428 | 604 jmp_buf setjmp_buffer; /* for return to caller */ |
| 605 }; | |
| 606 | |
| 607 static void | |
| 771 | 608 gif_error_func (const Extbyte *err_str, VoidPtr error_ptr) |
| 428 | 609 { |
| 647 | 610 struct gif_error_struct *error_data = (struct gif_error_struct *) error_ptr; |
| 428 | 611 |
| 612 /* return to setjmp point */ | |
| 613 error_data->err_str = err_str; | |
| 614 longjmp (error_data->setjmp_buffer, 1); | |
| 615 } | |
| 616 | |
| 617 static void | |
| 618 gif_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 619 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 620 int dest_mask, Lisp_Object domain) |
| 621 { | |
| 440 | 622 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 623 /* It is OK for the unwind data to be local to this function, |
| 624 because the unwind-protect is always executed when this | |
| 625 stack frame is still valid. */ | |
| 626 struct gif_unwind_data unwind; | |
| 627 int speccount = specpdl_depth (); | |
| 628 gif_memory_storage mem_struct; | |
| 629 struct gif_error_struct gif_err; | |
| 2367 | 630 Binbyte *bytes; |
| 665 | 631 Bytecount len; |
| 428 | 632 int height = 0; |
| 633 int width = 0; | |
| 634 | |
| 635 xzero (unwind); | |
| 636 record_unwind_protect (gif_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 637 | |
| 638 /* 1. Now decode the data. */ | |
| 639 | |
| 640 { | |
| 641 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 642 | |
| 643 assert (!NILP (data)); | |
| 644 | |
| 645 if (!(unwind.giffile = GifSetup())) | |
| 440 | 646 signal_image_error ("Insufficient memory to instantiate GIF image", instantiator); |
| 428 | 647 |
| 648 /* set up error facilities */ | |
| 649 if (setjmp(gif_err.setjmp_buffer)) | |
| 650 { | |
| 651 /* An error was signaled. No clean up is needed, as unwind handles that | |
| 652 for us. Just pass the error along. */ | |
| 867 | 653 Ibyte *interr; |
| 428 | 654 Lisp_Object errstring; |
| 771 | 655 EXTERNAL_TO_C_STRING (gif_err.err_str, interr, Qnative); |
| 656 errstring = build_msg_intstring (interr); | |
| 428 | 657 signal_image_error_2 ("GIF decoding error", errstring, instantiator); |
| 658 } | |
| 659 GifSetErrorFunc(unwind.giffile, (Gif_error_func)gif_error_func, (VoidPtr)&gif_err); | |
| 660 | |
| 440 | 661 TO_EXTERNAL_FORMAT (LISP_STRING, data, ALLOCA, (bytes, len), Qbinary); |
| 428 | 662 mem_struct.bytes = bytes; |
| 663 mem_struct.len = len; | |
| 664 mem_struct.index = 0; | |
| 665 GifSetReadFunc(unwind.giffile, gif_read_from_memory, (VoidPtr)&mem_struct); | |
| 666 GifSetCloseFunc(unwind.giffile, gif_memory_close, (VoidPtr)&mem_struct); | |
| 667 DGifInitRead(unwind.giffile); | |
| 668 | |
| 669 /* Then slurp the image into memory, decoding along the way. | |
| 670 The result is the image in a simple one-byte-per-pixel | |
| 671 format (#### the GIF routines only support 8-bit GIFs, | |
| 672 it appears). */ | |
| 673 DGifSlurp (unwind.giffile); | |
| 674 } | |
| 675 | |
| 676 /* 3. Now create the EImage(s) */ | |
| 677 { | |
| 678 ColorMapObject *cmo = unwind.giffile->SColorMap; | |
| 679 int i, j, row, pass, interlace, slice; | |
| 2367 | 680 Binbyte *eip; |
| 428 | 681 /* interlaced gifs have rows in this order: |
| 682 0, 8, 16, ..., 4, 12, 20, ..., 2, 6, 10, ..., 1, 3, 5, ... */ | |
| 683 static int InterlacedOffset[] = { 0, 4, 2, 1 }; | |
| 684 static int InterlacedJumps[] = { 8, 8, 4, 2 }; | |
| 685 | |
| 686 height = unwind.giffile->SHeight; | |
| 687 width = unwind.giffile->SWidth; | |
| 2367 | 688 unwind.eimage = |
| 689 xnew_binbytes (width * height * 3 * unwind.giffile->ImageCount); | |
| 428 | 690 if (!unwind.eimage) |
| 691 signal_image_error("Unable to allocate enough memory for image", instantiator); | |
| 692 | |
| 693 /* write the data in EImage format (8bit RGB triples) */ | |
| 694 | |
| 695 for (slice = 0; slice < unwind.giffile->ImageCount; slice++) | |
| 696 { | |
| 638 | 697 /* We check here that the current image covers the full "screen" size. */ |
| 428 | 698 if (unwind.giffile->SavedImages[slice].ImageDesc.Height != height |
| 699 || unwind.giffile->SavedImages[slice].ImageDesc.Width != width | |
| 700 || unwind.giffile->SavedImages[slice].ImageDesc.Left != 0 | |
| 701 || unwind.giffile->SavedImages[slice].ImageDesc.Top != 0) | |
| 702 signal_image_error ("Image in GIF file is not full size", | |
| 703 instantiator); | |
| 704 | |
| 705 interlace = unwind.giffile->SavedImages[slice].ImageDesc.Interlace; | |
| 706 pass = 0; | |
| 707 row = interlace ? InterlacedOffset[pass] : 0; | |
| 708 eip = unwind.eimage + (width * height * 3 * slice); | |
| 709 for (i = 0; i < height; i++) | |
| 710 { | |
| 711 if (interlace) | |
| 712 if (row >= height) { | |
| 713 row = InterlacedOffset[++pass]; | |
| 714 while (row >= height) | |
| 715 row = InterlacedOffset[++pass]; | |
| 716 } | |
| 717 eip = unwind.eimage + (width * height * 3 * slice) + (row * width * 3); | |
| 718 for (j = 0; j < width; j++) | |
| 719 { | |
| 2367 | 720 Binbyte pixel = |
| 428 | 721 unwind.giffile->SavedImages[slice].RasterBits[(i * width) + j]; |
| 722 *eip++ = cmo->Colors[pixel].Red; | |
| 723 *eip++ = cmo->Colors[pixel].Green; | |
| 724 *eip++ = cmo->Colors[pixel].Blue; | |
| 725 } | |
| 726 row += interlace ? InterlacedJumps[pass] : 1; | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 /* now instantiate */ | |
| 442 | 731 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 732 init_image_instance_from_eimage, |
| 2959 | 733 (ii, width, height, unwind.giffile->ImageCount, |
| 734 unwind.eimage, dest_mask, instantiator, pointer_fg, | |
| 735 pointer_bg, domain)); | |
| 428 | 736 } |
| 737 | |
| 738 /* We read the gif successfully. If we have more than one slice then | |
| 739 animate the gif. */ | |
| 740 if (unwind.giffile->ImageCount > 1) | |
| 741 { | |
| 742 /* See if there is a timeout value. In theory there could be one | |
| 743 for every image - but that makes the implementation way to | |
| 744 complicated for now so we just take the first. */ | |
| 745 unsigned short timeout = 0; | |
| 746 Lisp_Object tid; | |
| 747 | |
| 748 if (unwind.giffile->SavedImages[0].Function == GRAPHICS_EXT_FUNC_CODE | |
| 749 && | |
| 750 unwind.giffile->SavedImages[0].ExtensionBlockCount) | |
| 751 { | |
| 752 timeout = (unsigned short) | |
| 438 | 753 ((unwind.giffile->SavedImages[0].ExtensionBlocks[0].Bytes[2] << 8) + |
| 428 | 754 unwind.giffile-> SavedImages[0].ExtensionBlocks[0].Bytes[1]) * 10; |
| 755 } | |
| 756 | |
| 757 /* Too short a timeout will crucify us performance-wise. */ | |
| 758 tid = add_glyph_animated_timeout (timeout > 10 ? timeout : 10, image_instance); | |
| 759 | |
| 760 if (!NILP (tid)) | |
| 761 IMAGE_INSTANCE_PIXMAP_TIMEOUT (ii) = XINT (tid); | |
| 762 } | |
| 438 | 763 |
| 771 | 764 unbind_to (speccount); |
| 428 | 765 } |
| 766 | |
| 767 #endif /* HAVE_GIF */ | |
| 768 | |
| 769 | |
| 770 #ifdef HAVE_PNG | |
| 771 | |
| 772 /********************************************************************** | |
| 773 * PNG * | |
| 774 **********************************************************************/ | |
| 775 static void | |
| 776 png_validate (Lisp_Object instantiator) | |
| 777 { | |
| 778 file_or_data_must_be_present (instantiator); | |
| 779 } | |
| 780 | |
| 781 static Lisp_Object | |
| 442 | 782 png_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 783 Lisp_Object UNUSED (dest_mask)) |
| 428 | 784 { |
| 785 return simple_image_type_normalize (inst, console_type, Qpng); | |
| 786 } | |
| 787 | |
| 788 static int | |
| 789 png_possible_dest_types (void) | |
| 790 { | |
| 791 return IMAGE_COLOR_PIXMAP_MASK; | |
| 792 } | |
| 793 | |
| 794 struct png_memory_storage | |
| 795 { | |
| 2367 | 796 const Binbyte *bytes; /* The data */ |
| 665 | 797 Bytecount len; /* How big is it? */ |
| 798 Bytecount index; /* Where are we? */ | |
| 428 | 799 }; |
| 800 | |
| 801 static void | |
| 647 | 802 png_read_from_memory (png_structp png_ptr, png_bytep data, |
| 803 png_size_t length) | |
| 428 | 804 { |
| 805 struct png_memory_storage *tbr = | |
| 806 (struct png_memory_storage *) png_get_io_ptr (png_ptr); | |
| 807 | |
| 665 | 808 if ((Bytecount) length > (tbr->len - tbr->index)) |
| 428 | 809 png_error (png_ptr, (png_const_charp) "Read Error"); |
| 647 | 810 memcpy (data, tbr->bytes + tbr->index,length); |
| 428 | 811 tbr->index = tbr->index + length; |
| 812 } | |
| 813 | |
| 814 struct png_error_struct | |
| 815 { | |
| 442 | 816 const char *err_str; |
| 428 | 817 jmp_buf setjmp_buffer; /* for return to caller */ |
| 818 }; | |
| 819 | |
| 820 /* jh 98/03/12 - #### AARRRGH! libpng includes jmp_buf inside its own | |
| 821 structure, and there are cases where the size can be different from | |
| 822 between inside the library, and inside the code! To do an end run | |
| 823 around this, use our own error functions, and don't rely on things | |
| 824 passed in the png_ptr to them. This is an ugly hack and must | |
| 825 go away when the lisp engine is threaded! */ | |
| 826 static struct png_error_struct png_err_stct; | |
| 827 | |
| 828 static void | |
| 2286 | 829 png_error_func (png_structp UNUSED (png_ptr), png_const_charp msg) |
| 428 | 830 { |
| 831 png_err_stct.err_str = msg; | |
| 832 longjmp (png_err_stct.setjmp_buffer, 1); | |
| 833 } | |
| 834 | |
| 835 static void | |
| 2286 | 836 png_warning_func (png_structp UNUSED (png_ptr), png_const_charp msg) |
| 428 | 837 { |
| 3734 | 838 DECLARE_EISTRING (eimsg); |
| 839 | |
| 840 eicpy_ext(eimsg, msg, Qbinary); | |
| 841 warn_when_safe (Qpng, Qinfo, "%s", eidata(eimsg)); | |
| 428 | 842 } |
| 843 | |
| 844 struct png_unwind_data | |
| 845 { | |
| 846 FILE *instream; | |
| 2367 | 847 Binbyte *eimage; |
| 428 | 848 png_structp png_ptr; |
| 849 png_infop info_ptr; | |
| 850 }; | |
| 851 | |
| 852 static Lisp_Object | |
| 853 png_instantiate_unwind (Lisp_Object unwind_obj) | |
| 854 { | |
| 855 struct png_unwind_data *data = | |
| 856 (struct png_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 857 | |
| 858 free_opaque_ptr (unwind_obj); | |
| 859 if (data->png_ptr) | |
| 3839 | 860 { |
| 861 /* ensure we can't get here again */ | |
| 862 png_structp tmp = data->png_ptr; | |
| 863 data->png_ptr = NULL; | |
| 864 png_destroy_read_struct (&tmp, &(data->info_ptr), (png_infopp)NULL); | |
| 865 } | |
| 866 | |
| 428 | 867 if (data->instream) |
| 771 | 868 retry_fclose (data->instream); |
| 428 | 869 |
| 1726 | 870 if (data->eimage) |
| 2367 | 871 xfree(data->eimage, Binbyte *); |
| 428 | 872 |
| 873 return Qnil; | |
| 874 } | |
| 875 | |
| 876 static void | |
| 877 png_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 878 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 879 int dest_mask, Lisp_Object domain) |
| 880 { | |
| 440 | 881 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 882 struct png_unwind_data unwind; |
| 883 int speccount = specpdl_depth (); | |
| 884 int height, width; | |
| 885 struct png_memory_storage tbr; /* Data to be read */ | |
| 886 | |
| 887 /* PNG variables */ | |
| 888 png_structp png_ptr; | |
| 889 png_infop info_ptr; | |
| 890 | |
| 3839 | 891 xzero (unwind); |
| 892 record_unwind_protect (png_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 893 | |
| 894 if (setjmp (png_err_stct.setjmp_buffer)) | |
| 895 { | |
| 896 /* Something blew up: | |
| 897 just display the error (cleanup happens in the unwind) */ | |
| 898 signal_image_error_2 ("Error decoding PNG", | |
| 899 build_string(png_err_stct.err_str), | |
| 900 instantiator); | |
| 901 } | |
| 902 | |
| 428 | 903 /* Initialize all PNG structures */ |
| 3839 | 904 png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, |
| 905 (void *) &png_err_stct, | |
| 428 | 906 png_error_func, png_warning_func); |
| 907 if (!png_ptr) | |
| 908 signal_image_error ("Error obtaining memory for png_read", instantiator); | |
| 3839 | 909 unwind.png_ptr = png_ptr; |
| 910 | |
| 428 | 911 info_ptr = png_create_info_struct (png_ptr); |
| 912 if (!info_ptr) | |
| 913 { | |
| 3839 | 914 unwind.png_ptr = NULL; /* avoid re-calling png_destroy_read_struct |
| 915 when unwinding */ | |
| 428 | 916 png_destroy_read_struct (&png_ptr, (png_infopp)NULL, (png_infopp)NULL); |
| 917 signal_image_error ("Error obtaining memory for png_read", instantiator); | |
| 918 } | |
| 919 unwind.info_ptr = info_ptr; | |
| 920 | |
| 921 /* This code is a mixture of stuff from Ben's GIF/JPEG stuff from | |
| 922 this file, example.c from the libpng 0.81 distribution, and the | |
| 923 pngtopnm sources. -WMP- | |
| 924 */ | |
| 925 /* It has been further modified to handle the API changes for 0.96, | |
| 926 and is no longer usable for previous versions. jh | |
| 927 */ | |
| 928 | |
| 929 /* Initialize the IO layer and read in header information */ | |
| 930 { | |
| 931 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 932 const Binbyte *bytes; |
| 665 | 933 Bytecount len; |
| 428 | 934 |
| 935 assert (!NILP (data)); | |
| 936 | |
| 937 /* #### This is a definite problem under Mule due to the amount of | |
| 938 stack data it might allocate. Need to think about using Lstreams */ | |
| 440 | 939 TO_EXTERNAL_FORMAT (LISP_STRING, data, ALLOCA, (bytes, len), Qbinary); |
| 428 | 940 tbr.bytes = bytes; |
| 941 tbr.len = len; | |
| 942 tbr.index = 0; | |
| 943 png_set_read_fn (png_ptr,(void *) &tbr, png_read_from_memory); | |
| 944 } | |
| 945 | |
| 946 png_read_info (png_ptr, info_ptr); | |
| 947 | |
| 948 { | |
| 949 int y; | |
| 2367 | 950 Binbyte **row_pointers; |
| 428 | 951 height = info_ptr->height; |
| 952 width = info_ptr->width; | |
| 953 | |
| 954 /* Wow, allocate all the memory. Truly, exciting. */ | |
| 2367 | 955 unwind.eimage = xnew_array_and_zero (Binbyte, width * height * 3); |
| 428 | 956 /* libpng expects that the image buffer passed in contains a |
| 957 picture to draw on top of if the png has any transparencies. | |
| 958 This could be a good place to pass that in... */ | |
| 959 | |
| 960 row_pointers = xnew_array (png_byte *, height); | |
| 961 | |
| 962 for (y = 0; y < height; y++) | |
| 963 row_pointers[y] = unwind.eimage + (width * 3 * y); | |
| 964 | |
| 965 { | |
| 966 /* if the png specifies a background chunk, go ahead and | |
| 967 use it, else use what we can get from the default face. */ | |
| 968 png_color_16 my_background, *image_background; | |
| 969 Lisp_Object bkgd = Qnil; | |
| 970 | |
| 971 my_background.red = 0x7fff; | |
| 972 my_background.green = 0x7fff; | |
| 973 my_background.blue = 0x7fff; | |
| 974 bkgd = FACE_BACKGROUND (Vdefault_face, domain); | |
| 975 if (!COLOR_INSTANCEP (bkgd)) | |
| 976 { | |
| 977 warn_when_safe (Qpng, Qinfo, "Couldn't get background color!"); | |
| 978 } | |
| 979 else | |
| 980 { | |
| 440 | 981 Lisp_Color_Instance *c; |
| 428 | 982 Lisp_Object rgblist; |
| 983 | |
| 984 c = XCOLOR_INSTANCE (bkgd); | |
| 985 rgblist = MAYBE_LISP_DEVMETH (XDEVICE (c->device), | |
| 986 color_instance_rgb_components, | |
| 987 (c)); | |
| 442 | 988 my_background.red = (unsigned short) XINT (XCAR (rgblist)); |
| 989 my_background.green = (unsigned short) XINT (XCAR (XCDR (rgblist))); | |
| 990 my_background.blue = (unsigned short) XINT (XCAR (XCDR (XCDR (rgblist)))); | |
| 428 | 991 } |
| 992 | |
| 993 if (png_get_bKGD (png_ptr, info_ptr, &image_background)) | |
| 994 png_set_background (png_ptr, image_background, | |
| 995 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); | |
| 996 else | |
| 997 png_set_background (png_ptr, &my_background, | |
| 998 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); | |
| 999 } | |
| 1000 | |
| 1001 /* Now that we're using EImage, ask for 8bit RGB triples for any type | |
| 1002 of image*/ | |
| 1003 /* convert palette images to full RGB */ | |
| 1004 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) | |
| 1005 png_set_expand (png_ptr); | |
| 1006 /* send grayscale images to RGB too */ | |
| 1007 if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY || | |
| 1008 info_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) | |
| 1009 png_set_gray_to_rgb (png_ptr); | |
| 1010 /* we can't handle alpha values */ | |
| 1011 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) | |
| 1012 png_set_strip_alpha (png_ptr); | |
| 1013 /* tell libpng to strip 16 bit depth files down to 8 bits */ | |
| 1014 if (info_ptr->bit_depth == 16) | |
| 1015 png_set_strip_16 (png_ptr); | |
| 1016 /* if the image is < 8 bits, pad it out */ | |
| 1017 if (info_ptr->bit_depth < 8) | |
| 1018 { | |
| 1019 if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY) | |
| 1020 png_set_expand (png_ptr); | |
| 1021 else | |
| 1022 png_set_packing (png_ptr); | |
| 1023 } | |
| 1024 | |
| 1025 png_read_image (png_ptr, row_pointers); | |
| 1026 png_read_end (png_ptr, info_ptr); | |
| 1027 | |
| 793 | 1028 #if 1 /* def PNG_SHOW_COMMENTS */ |
| 428 | 1029 /* #### |
| 1030 * I turn this off by default now, because the !%^@#!% comments | |
| 1031 * show up every time the image is instantiated, which can get | |
| 1032 * really really annoying. There should be some way to pass this | |
| 1033 * type of data down into the glyph code, where you can get to it | |
| 1034 * from lisp anyway. - WMP | |
| 1035 */ | |
| 793 | 1036 /* #### I've turned this on, since these warnings are now |
| 1037 unobtrusive. */ | |
| 428 | 1038 { |
| 1039 int i; | |
| 3734 | 1040 DECLARE_EISTRING (key); |
| 1041 DECLARE_EISTRING (text); | |
| 428 | 1042 |
| 1043 for (i = 0 ; i < info_ptr->num_text ; i++) | |
| 1044 { | |
| 1045 /* How paranoid do I have to be about no trailing NULLs, and | |
| 1046 using (int)info_ptr->text[i].text_length, and strncpy and a temp | |
| 1047 string somewhere? */ | |
| 3734 | 1048 eireset(key); |
| 1049 eireset(text); | |
| 1050 eicpy_ext(key, info_ptr->text[i].key, Qbinary); | |
| 1051 eicpy_ext(text, info_ptr->text[i].text, Qbinary); | |
| 428 | 1052 |
| 1053 warn_when_safe (Qpng, Qinfo, "%s - %s", | |
| 3734 | 1054 eidata(key), eidata(text)); |
| 428 | 1055 } |
| 1056 } | |
| 1057 #endif | |
| 1058 | |
| 2367 | 1059 xfree (row_pointers, Binbyte **); |
| 428 | 1060 } |
| 1061 | |
| 1062 /* now instantiate */ | |
| 442 | 1063 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 1064 init_image_instance_from_eimage, |
| 1065 (ii, width, height, 1, unwind.eimage, dest_mask, | |
| 2959 | 1066 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 1067 |
| 1068 /* This will clean up everything else. */ | |
| 771 | 1069 unbind_to (speccount); |
| 428 | 1070 } |
| 1071 | |
| 1072 #endif /* HAVE_PNG */ | |
| 1073 | |
| 1074 | |
| 1075 #ifdef HAVE_TIFF | |
| 1076 #include "tiffio.h" | |
| 1077 | |
| 1078 /********************************************************************** | |
| 1079 * TIFF * | |
| 1080 **********************************************************************/ | |
| 1081 static void | |
| 1082 tiff_validate (Lisp_Object instantiator) | |
| 1083 { | |
| 1084 file_or_data_must_be_present (instantiator); | |
| 1085 } | |
| 1086 | |
| 1087 static Lisp_Object | |
| 442 | 1088 tiff_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 1089 Lisp_Object UNUSED (dest_mask)) |
| 428 | 1090 { |
| 1091 return simple_image_type_normalize (inst, console_type, Qtiff); | |
| 1092 } | |
| 1093 | |
| 1094 static int | |
| 1095 tiff_possible_dest_types (void) | |
| 1096 { | |
| 1097 return IMAGE_COLOR_PIXMAP_MASK; | |
| 1098 } | |
| 1099 | |
| 1100 struct tiff_unwind_data | |
| 1101 { | |
| 2367 | 1102 Binbyte *eimage; |
| 428 | 1103 /* Object that holds the decoded data from a TIFF file */ |
| 1104 TIFF *tiff; | |
| 1105 }; | |
| 1106 | |
| 1107 static Lisp_Object | |
| 1108 tiff_instantiate_unwind (Lisp_Object unwind_obj) | |
| 1109 { | |
| 1110 struct tiff_unwind_data *data = | |
| 1111 (struct tiff_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 1112 | |
| 1113 free_opaque_ptr (unwind_obj); | |
| 1114 if (data->tiff) | |
| 1115 { | |
| 1116 TIFFClose(data->tiff); | |
| 1117 } | |
| 1118 if (data->eimage) | |
| 2367 | 1119 xfree (data->eimage, Binbyte *); |
| 428 | 1120 |
| 1121 return Qnil; | |
| 1122 } | |
| 1123 | |
| 1124 typedef struct tiff_memory_storage | |
| 1125 { | |
| 2367 | 1126 Binbyte *bytes; /* The data */ |
| 665 | 1127 Bytecount len; /* How big is it? */ |
| 1128 Bytecount index; /* Where are we? */ | |
| 428 | 1129 } tiff_memory_storage; |
| 1130 | |
| 1131 static size_t | |
| 647 | 1132 tiff_memory_read (thandle_t data, tdata_t buf, tsize_t size) |
| 428 | 1133 { |
| 647 | 1134 tiff_memory_storage *mem = (tiff_memory_storage *) data; |
| 428 | 1135 |
| 665 | 1136 if ((Bytecount) size > (mem->len - mem->index)) |
| 428 | 1137 return (size_t) -1; |
| 647 | 1138 memcpy (buf, mem->bytes + mem->index, size); |
| 428 | 1139 mem->index = mem->index + size; |
| 1140 return size; | |
| 1141 } | |
| 1142 | |
| 647 | 1143 static size_t |
| 2286 | 1144 tiff_memory_write (thandle_t UNUSED (data), tdata_t UNUSED (buf), |
| 1145 tsize_t UNUSED (size)) | |
| 428 | 1146 { |
| 2500 | 1147 ABORT(); |
| 2270 | 1148 return 0; |
| 428 | 1149 } |
| 1150 | |
| 647 | 1151 static toff_t |
| 1152 tiff_memory_seek (thandle_t data, toff_t off, int whence) | |
| 428 | 1153 { |
| 647 | 1154 tiff_memory_storage *mem = (tiff_memory_storage *) data; |
| 428 | 1155 int newidx; |
| 647 | 1156 switch(whence) |
| 1157 { | |
| 1158 case SEEK_SET: | |
| 1159 newidx = off; | |
| 1160 break; | |
| 1161 case SEEK_END: | |
| 1162 newidx = mem->len + off; | |
| 1163 break; | |
| 1164 case SEEK_CUR: | |
| 1165 newidx = mem->index + off; | |
| 1166 break; | |
| 1167 default: | |
| 1168 fprintf (stderr, "Eh? invalid seek mode in tiff_memory_seek\n"); | |
| 1169 return (toff_t) -1; | |
| 1170 } | |
| 428 | 1171 |
| 1172 if ((newidx > mem->len) || (newidx < 0)) | |
| 593 | 1173 return (toff_t) -1; |
| 428 | 1174 |
| 1175 mem->index = newidx; | |
| 1176 return newidx; | |
| 1177 } | |
| 1178 | |
| 1179 static int | |
| 2286 | 1180 tiff_memory_close (thandle_t UNUSED (data)) |
| 428 | 1181 { |
| 1182 return 0; | |
| 1183 } | |
| 1184 | |
| 1185 static int | |
| 2286 | 1186 tiff_map_noop (thandle_t UNUSED (data), tdata_t* UNUSED (pbase), |
| 1187 toff_t* UNUSED (psize)) | |
| 428 | 1188 { |
| 1189 return 0; | |
| 1190 } | |
| 1191 | |
| 1192 static void | |
| 2286 | 1193 tiff_unmap_noop (thandle_t UNUSED (data), tdata_t UNUSED (pbase), |
| 1194 toff_t UNUSED (psize)) | |
| 428 | 1195 { |
| 1196 return; | |
| 1197 } | |
| 1198 | |
| 1199 static toff_t | |
| 647 | 1200 tiff_memory_size (thandle_t data) |
| 428 | 1201 { |
| 1202 tiff_memory_storage *mem = (tiff_memory_storage*)data; | |
| 1203 return mem->len; | |
| 1204 } | |
| 1205 | |
| 1206 struct tiff_error_struct | |
| 1207 { | |
| 438 | 1208 #ifdef HAVE_VSNPRINTF |
| 428 | 1209 char err_str[256]; |
| 1210 #else | |
| 1211 char err_str[1024]; /* return the error string */ | |
| 1212 #endif | |
| 1213 jmp_buf setjmp_buffer; /* for return to caller */ | |
| 1214 }; | |
| 1215 | |
| 1216 /* jh 98/03/12 - ###This struct for passing data to the error functions | |
| 1217 is an ugly hack caused by the fact that libtiff (as of v3.4) doesn't | |
| 1218 have any place to store error func data. This should be rectified | |
| 1219 before XEmacs gets threads! */ | |
| 1220 static struct tiff_error_struct tiff_err_data; | |
| 1221 | |
| 1222 static void | |
| 2286 | 1223 tiff_error_func (const char *UNUSED (module), const char *fmt, ...) |
| 428 | 1224 { |
| 1225 va_list vargs; | |
| 1226 | |
| 1227 va_start (vargs, fmt); | |
| 438 | 1228 #ifdef HAVE_VSNPRINTF |
| 428 | 1229 vsnprintf (tiff_err_data.err_str, 255, fmt, vargs); |
| 1230 #else | |
| 1231 /* pray this doesn't overflow... */ | |
| 1232 vsprintf (tiff_err_data.err_str, fmt, vargs); | |
| 1233 #endif | |
| 1234 va_end (vargs); | |
| 1235 /* return to setjmp point */ | |
| 1236 longjmp (tiff_err_data.setjmp_buffer, 1); | |
| 1237 } | |
| 1238 | |
| 1239 static void | |
| 647 | 1240 tiff_warning_func (const char *module, const char *fmt, ...) |
| 428 | 1241 { |
| 1242 va_list vargs; | |
| 438 | 1243 #ifdef HAVE_VSNPRINTF |
| 428 | 1244 char warn_str[256]; |
| 1245 #else | |
| 1246 char warn_str[1024]; | |
| 1247 #endif | |
| 3734 | 1248 DECLARE_EISTRING (eimodule); |
| 1249 DECLARE_EISTRING (eiwarnstr); | |
| 428 | 1250 |
| 1251 va_start (vargs, fmt); | |
| 438 | 1252 #ifdef HAVE_VSNPRINTF |
| 428 | 1253 vsnprintf (warn_str, 255, fmt, vargs); |
| 1254 #else | |
| 1255 vsprintf (warn_str, fmt, vargs); | |
| 1256 #endif | |
| 1257 va_end (vargs); | |
| 3734 | 1258 |
| 1259 eicpy_ext(eimodule, module, Qbinary); | |
| 1260 eicpy_ext(eiwarnstr, warn_str, Qbinary); | |
| 1261 | |
| 428 | 1262 warn_when_safe (Qtiff, Qinfo, "%s - %s", |
| 3734 | 1263 eidata(eimodule), |
| 1264 eidata(eiwarnstr)); | |
| 428 | 1265 } |
| 1266 | |
| 1267 static void | |
| 1268 tiff_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 1269 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 1270 int dest_mask, Lisp_Object domain) |
| 1271 { | |
| 440 | 1272 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 1273 tiff_memory_storage mem_struct; |
| 1274 /* It is OK for the unwind data to be local to this function, | |
| 1275 because the unwind-protect is always executed when this | |
| 1276 stack frame is still valid. */ | |
| 1277 struct tiff_unwind_data unwind; | |
| 1278 int speccount = specpdl_depth (); | |
| 1279 uint32 width, height; | |
| 1280 | |
| 1281 xzero (unwind); | |
| 1282 record_unwind_protect (tiff_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 1283 | |
| 1284 /* set up error facilities */ | |
| 1285 if (setjmp (tiff_err_data.setjmp_buffer)) | |
| 1286 { | |
| 1287 /* An error was signaled. No clean up is needed, as unwind handles that | |
| 1288 for us. Just pass the error along. */ | |
| 1289 signal_image_error_2 ("TIFF decoding error", | |
| 1290 build_string(tiff_err_data.err_str), | |
| 1291 instantiator); | |
| 1292 } | |
| 1293 TIFFSetErrorHandler ((TIFFErrorHandler)tiff_error_func); | |
| 1294 TIFFSetWarningHandler ((TIFFErrorHandler)tiff_warning_func); | |
| 1295 { | |
| 1296 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 1297 Binbyte *bytes; |
| 665 | 1298 Bytecount len; |
| 428 | 1299 |
| 1300 uint32 *raster; | |
| 2367 | 1301 Binbyte *ep; |
| 428 | 1302 |
| 1303 assert (!NILP (data)); | |
| 1304 | |
| 1305 /* #### This is a definite problem under Mule due to the amount of | |
| 1306 stack data it might allocate. Think about Lstreams... */ | |
| 440 | 1307 TO_EXTERNAL_FORMAT (LISP_STRING, data, |
| 1308 ALLOCA, (bytes, len), | |
| 1309 Qbinary); | |
| 428 | 1310 mem_struct.bytes = bytes; |
| 1311 mem_struct.len = len; | |
| 1312 mem_struct.index = 0; | |
| 1313 | |
| 442 | 1314 unwind.tiff = TIFFClientOpen ("memfile", "r", (thandle_t) &mem_struct, |
| 428 | 1315 (TIFFReadWriteProc)tiff_memory_read, |
| 1316 (TIFFReadWriteProc)tiff_memory_write, | |
| 1317 tiff_memory_seek, tiff_memory_close, tiff_memory_size, | |
| 1318 tiff_map_noop, tiff_unmap_noop); | |
| 1319 if (!unwind.tiff) | |
| 440 | 1320 signal_image_error ("Insufficient memory to instantiate TIFF image", instantiator); |
| 428 | 1321 |
| 1322 TIFFGetField (unwind.tiff, TIFFTAG_IMAGEWIDTH, &width); | |
| 1323 TIFFGetField (unwind.tiff, TIFFTAG_IMAGELENGTH, &height); | |
| 2367 | 1324 unwind.eimage = xnew_binbytes (width * height * 3); |
| 428 | 1325 |
| 440 | 1326 /* #### This is little more than proof-of-concept/function testing. |
| 428 | 1327 It needs to be reimplemented via scanline reads for both memory |
| 1328 compactness. */ | |
| 1329 raster = (uint32*) _TIFFmalloc (width * height * sizeof (uint32)); | |
| 1330 if (raster != NULL) | |
| 1331 { | |
| 647 | 1332 int i, j; |
| 428 | 1333 uint32 *rp; |
| 1334 ep = unwind.eimage; | |
| 1335 rp = raster; | |
| 1336 if (TIFFReadRGBAImage (unwind.tiff, width, height, raster, 0)) | |
| 1337 { | |
| 1338 for (i = height - 1; i >= 0; i--) | |
| 1339 { | |
| 1340 /* This is to get around weirdness in the libtiff library where properly | |
| 1341 made TIFFs will come out upside down. libtiff bug or jhod-brainlock? */ | |
| 1342 rp = raster + (i * width); | |
| 647 | 1343 for (j = 0; j < (int) width; j++) |
| 428 | 1344 { |
| 2367 | 1345 *ep++ = (Binbyte)TIFFGetR(*rp); |
| 1346 *ep++ = (Binbyte)TIFFGetG(*rp); | |
| 1347 *ep++ = (Binbyte)TIFFGetB(*rp); | |
| 428 | 1348 rp++; |
| 1349 } | |
| 1350 } | |
| 1351 } | |
| 1352 _TIFFfree (raster); | |
| 1353 } else | |
| 1354 signal_image_error ("Unable to allocate memory for TIFFReadRGBA", instantiator); | |
| 1355 | |
| 1356 } | |
| 1357 | |
| 1358 /* now instantiate */ | |
| 442 | 1359 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 1360 init_image_instance_from_eimage, |
| 1361 (ii, width, height, 1, unwind.eimage, dest_mask, | |
| 2959 | 1362 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 1363 |
| 771 | 1364 unbind_to (speccount); |
| 428 | 1365 } |
| 1366 | |
| 1367 #endif /* HAVE_TIFF */ | |
| 1368 | |
| 1369 | |
| 1370 /************************************************************************/ | |
| 1371 /* initialization */ | |
| 1372 /************************************************************************/ | |
| 1373 | |
| 1374 void | |
| 1375 syms_of_glyphs_eimage (void) | |
| 1376 { | |
| 1377 } | |
| 1378 | |
| 1379 void | |
| 1380 image_instantiator_format_create_glyphs_eimage (void) | |
| 1381 { | |
| 1382 /* image-instantiator types */ | |
| 1383 #ifdef HAVE_JPEG | |
| 1384 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (jpeg, "jpeg"); | |
| 1385 | |
| 1386 IIFORMAT_HAS_METHOD (jpeg, validate); | |
| 1387 IIFORMAT_HAS_METHOD (jpeg, normalize); | |
| 1388 IIFORMAT_HAS_METHOD (jpeg, possible_dest_types); | |
| 1389 IIFORMAT_HAS_METHOD (jpeg, instantiate); | |
| 1390 | |
| 1391 IIFORMAT_VALID_KEYWORD (jpeg, Q_data, check_valid_string); | |
| 1392 IIFORMAT_VALID_KEYWORD (jpeg, Q_file, check_valid_string); | |
| 1393 #endif | |
| 1394 | |
| 1395 #ifdef HAVE_GIF | |
| 1396 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (gif, "gif"); | |
| 1397 | |
| 1398 IIFORMAT_HAS_METHOD (gif, validate); | |
| 1399 IIFORMAT_HAS_METHOD (gif, normalize); | |
| 1400 IIFORMAT_HAS_METHOD (gif, possible_dest_types); | |
| 1401 IIFORMAT_HAS_METHOD (gif, instantiate); | |
| 1402 | |
| 1403 IIFORMAT_VALID_KEYWORD (gif, Q_data, check_valid_string); | |
| 1404 IIFORMAT_VALID_KEYWORD (gif, Q_file, check_valid_string); | |
| 1405 #endif | |
| 1406 | |
| 1407 #ifdef HAVE_PNG | |
| 1408 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (png, "png"); | |
| 1409 | |
| 1410 IIFORMAT_HAS_METHOD (png, validate); | |
| 1411 IIFORMAT_HAS_METHOD (png, normalize); | |
| 1412 IIFORMAT_HAS_METHOD (png, possible_dest_types); | |
| 1413 IIFORMAT_HAS_METHOD (png, instantiate); | |
| 1414 | |
| 1415 IIFORMAT_VALID_KEYWORD (png, Q_data, check_valid_string); | |
| 1416 IIFORMAT_VALID_KEYWORD (png, Q_file, check_valid_string); | |
| 1417 #endif | |
| 1418 | |
| 1419 #ifdef HAVE_TIFF | |
| 1420 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (tiff, "tiff"); | |
| 1421 | |
| 1422 IIFORMAT_HAS_METHOD (tiff, validate); | |
| 1423 IIFORMAT_HAS_METHOD (tiff, normalize); | |
| 1424 IIFORMAT_HAS_METHOD (tiff, possible_dest_types); | |
| 1425 IIFORMAT_HAS_METHOD (tiff, instantiate); | |
| 1426 | |
| 1427 IIFORMAT_VALID_KEYWORD (tiff, Q_data, check_valid_string); | |
| 1428 IIFORMAT_VALID_KEYWORD (tiff, Q_file, check_valid_string); | |
| 1429 #endif | |
| 1430 | |
| 1431 } | |
| 1432 | |
| 1433 void | |
| 1434 vars_of_glyphs_eimage (void) | |
| 1435 { | |
| 1436 #ifdef HAVE_JPEG | |
| 1437 Fprovide (Qjpeg); | |
| 1438 #endif | |
| 1439 | |
| 1440 #ifdef HAVE_GIF | |
| 1441 Fprovide (Qgif); | |
| 1442 #endif | |
| 1443 | |
| 1444 #ifdef HAVE_PNG | |
| 1445 Fprovide (Qpng); | |
| 1446 #endif | |
| 1447 | |
| 1448 #ifdef HAVE_TIFF | |
| 1449 Fprovide (Qtiff); | |
| 1450 #endif | |
| 1451 | |
| 1452 } |