Mercurial > hg > xemacs-beta
annotate src/glyphs-eimage.c @ 5022:cfe36e196dc7
long comment in syswindows.h about build constants
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-02-09 Ben Wing <ben@xemacs.org>
* syswindows.h:
Create a long comment about build flags such as WIN32_NATIVE,
HAVE_MS_WINDOWS.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Tue, 09 Feb 2010 19:07:36 -0600 |
| parents | 2ade80e8c640 |
| children | 7e57c0575a15 |
| 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 | |
|
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37 GIF support changed to external giflib by Jerry James for 21.5 |
| 428 | 38 TODO: |
| 39 Convert images.el to C and stick it in here? | |
| 3094 | 40 This file is really repetitious; can we refactor? |
| 428 | 41 */ |
| 42 | |
| 43 #include <config.h> | |
| 44 #include "lisp.h" | |
| 45 #include "lstream.h" | |
| 46 #include "console.h" | |
| 872 | 47 #include "device-impl.h" |
| 428 | 48 #include "faces.h" |
| 49 #include "glyphs.h" | |
| 872 | 50 #include "objects-impl.h" |
| 428 | 51 |
| 52 #include "buffer.h" | |
| 53 #include "frame.h" | |
| 54 #include "opaque.h" | |
| 442 | 55 #include "window.h" |
| 428 | 56 |
| 57 #include "sysfile.h" | |
| 58 | |
| 59 #ifdef HAVE_PNG | |
| 1743 | 60 |
| 61 BEGIN_C_DECLS | |
| 62 | |
| 647 | 63 #define message message_ /* Yuck */ |
| 428 | 64 #include <png.h> |
| 647 | 65 #undef message |
| 1743 | 66 |
| 67 END_C_DECLS | |
| 68 | |
| 428 | 69 #else |
| 70 #include <setjmp.h> | |
| 71 #endif | |
| 72 #include "file-coding.h" | |
| 73 | |
| 74 #ifdef HAVE_TIFF | |
| 75 DEFINE_IMAGE_INSTANTIATOR_FORMAT (tiff); | |
| 76 Lisp_Object Qtiff; | |
| 77 #endif | |
| 78 | |
| 79 #ifdef HAVE_JPEG | |
| 80 DEFINE_IMAGE_INSTANTIATOR_FORMAT (jpeg); | |
| 81 Lisp_Object Qjpeg; | |
| 82 #endif | |
| 83 | |
| 84 #ifdef HAVE_GIF | |
| 85 DEFINE_IMAGE_INSTANTIATOR_FORMAT (gif); | |
| 86 Lisp_Object Qgif; | |
| 87 #endif | |
| 88 | |
| 89 #ifdef HAVE_PNG | |
| 90 DEFINE_IMAGE_INSTANTIATOR_FORMAT (png); | |
| 91 Lisp_Object Qpng; | |
| 92 #endif | |
| 93 | |
| 94 | |
| 95 #ifdef HAVE_JPEG | |
| 96 | |
| 97 /********************************************************************** | |
| 98 * JPEG * | |
| 99 **********************************************************************/ | |
| 100 | |
| 1743 | 101 BEGIN_C_DECLS |
| 102 | |
| 4854 | 103 #ifdef WIN32_ANY |
| 104 /* #### Yuck! More horrifitude. tiffio.h, below, and sysfile.h above, | |
| 105 include <windows.h>, which defines INT32 and INT16, the former | |
| 106 differently and incompatibly from jmorecfg.h, included by jpeglib.h. We | |
| 107 can disable the stuff in jmorecfg.h by defining XMD_H (clever, huh?); | |
| 108 then we define these typedefs the way that <windows.h> wants them (which | |
| 109 is more correct, anyway; jmorecfg.h defines INT32 as `long'). */ | |
| 2500 | 110 #define XMD_H |
| 111 typedef signed int INT32; | |
| 112 typedef signed short INT16; | |
|
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113 |
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114 /* And another one... jmorecfg.h defines the 'boolean' type as int, |
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115 which conflicts with the standard Windows 'boolean' definition as |
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116 unsigned char. Ref: http://www.asmail.be/msg0054688232.html */ |
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117 #ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */ |
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118 typedef unsigned char boolean; |
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119 #endif |
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120 #define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */ |
| 2500 | 121 #endif |
| 122 | |
| 428 | 123 #include <jpeglib.h> |
| 124 #include <jerror.h> | |
| 1743 | 125 |
| 126 END_C_DECLS | |
| 428 | 127 |
| 128 /*#define USE_TEMP_FILES_FOR_JPEG_IMAGES 1*/ | |
| 129 static void | |
| 130 jpeg_validate (Lisp_Object instantiator) | |
| 131 { | |
| 132 file_or_data_must_be_present (instantiator); | |
| 133 } | |
| 134 | |
| 135 static Lisp_Object | |
| 442 | 136 jpeg_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 137 Lisp_Object UNUSED (dest_mask)) |
| 428 | 138 { |
| 139 return simple_image_type_normalize (inst, console_type, Qjpeg); | |
| 140 } | |
| 141 | |
| 142 static int | |
| 143 jpeg_possible_dest_types (void) | |
| 144 { | |
| 145 return IMAGE_COLOR_PIXMAP_MASK; | |
| 146 } | |
| 147 | |
| 148 /* To survive the otherwise baffling complexity of making sure | |
| 149 everything gets cleaned up in the presence of an error, we | |
| 150 use an unwind_protect(). */ | |
| 151 | |
| 152 struct jpeg_unwind_data | |
| 153 { | |
| 154 /* Stream that we need to close */ | |
| 155 FILE *instream; | |
| 156 /* Object that holds state info for JPEG decoding */ | |
| 157 struct jpeg_decompress_struct *cinfo_ptr; | |
| 158 /* EImage data */ | |
| 2367 | 159 Binbyte *eimage; |
| 428 | 160 }; |
| 161 | |
| 162 static Lisp_Object | |
| 163 jpeg_instantiate_unwind (Lisp_Object unwind_obj) | |
| 164 { | |
| 165 struct jpeg_unwind_data *data = | |
| 166 (struct jpeg_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 167 | |
| 168 free_opaque_ptr (unwind_obj); | |
| 169 if (data->cinfo_ptr) | |
| 170 jpeg_destroy_decompress (data->cinfo_ptr); | |
| 171 | |
| 172 if (data->instream) | |
| 771 | 173 retry_fclose (data->instream); |
| 428 | 174 |
| 1726 | 175 if (data->eimage) |
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176 xfree (data->eimage); |
| 428 | 177 |
| 178 return Qnil; | |
| 179 } | |
| 180 | |
| 181 /* | |
| 182 * ERROR HANDLING: | |
| 183 * | |
| 184 * The JPEG library's standard error handler (jerror.c) is divided into | |
| 185 * several "methods" which you can override individually. This lets you | |
| 186 * adjust the behavior without duplicating a lot of code, which you might | |
| 187 * have to update with each future release. | |
| 188 * | |
| 189 * Our example here shows how to override the "error_exit" method so that | |
| 190 * control is returned to the library's caller when a fatal error occurs, | |
| 191 * rather than calling exit() as the standard error_exit method does. | |
| 192 * | |
| 193 * We use C's setjmp/longjmp facility to return control. This means that the | |
| 194 * routine which calls the JPEG library must first execute a setjmp() call to | |
| 195 * establish the return point. We want the replacement error_exit to do a | |
| 196 * longjmp(). But we need to make the setjmp buffer accessible to the | |
| 197 * error_exit routine. To do this, we make a private extension of the | |
| 198 * standard JPEG error handler object. (If we were using C++, we'd say we | |
| 199 * were making a subclass of the regular error handler.) | |
| 200 * | |
| 201 * Here's the extended error handler struct: | |
| 202 */ | |
| 203 | |
| 204 struct my_jpeg_error_mgr | |
| 205 { | |
| 206 struct jpeg_error_mgr pub; /* "public" fields */ | |
| 207 jmp_buf setjmp_buffer; /* for return to caller */ | |
| 208 }; | |
| 209 | |
| 210 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 211 METHODDEF(void) | |
| 212 #else | |
| 213 METHODDEF void | |
| 214 #endif | |
| 2286 | 215 our_init_source (j_decompress_ptr UNUSED (cinfo)) |
| 428 | 216 { |
| 217 } | |
| 218 | |
| 219 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 220 METHODDEF(boolean) | |
| 221 #else | |
| 222 METHODDEF boolean | |
| 223 #endif | |
| 224 our_fill_input_buffer (j_decompress_ptr cinfo) | |
| 225 { | |
| 226 /* Insert a fake EOI marker */ | |
| 227 struct jpeg_source_mgr *src = cinfo->src; | |
| 228 static JOCTET buffer[2]; | |
| 229 | |
| 230 buffer[0] = (JOCTET) 0xFF; | |
| 231 buffer[1] = (JOCTET) JPEG_EOI; | |
| 232 | |
| 233 src->next_input_byte = buffer; | |
| 234 src->bytes_in_buffer = 2; | |
| 235 return TRUE; | |
| 236 } | |
| 237 | |
| 238 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 239 METHODDEF(void) | |
| 240 #else | |
| 241 METHODDEF void | |
| 242 #endif | |
| 243 our_skip_input_data (j_decompress_ptr cinfo, long num_bytes) | |
| 244 { | |
| 245 struct jpeg_source_mgr *src = NULL; | |
| 246 | |
| 247 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 248 | |
| 249 if (!src) | |
| 647 | 250 return; |
| 251 else if (num_bytes > (long) src->bytes_in_buffer) | |
| 428 | 252 { |
| 647 | 253 ERREXIT (cinfo, JERR_INPUT_EOF); |
| 254 /*NOTREACHED*/ | |
| 255 } | |
| 428 | 256 |
| 257 src->bytes_in_buffer -= num_bytes; | |
| 258 src->next_input_byte += num_bytes; | |
| 259 } | |
| 260 | |
| 261 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 262 METHODDEF(void) | |
| 263 #else | |
| 264 METHODDEF void | |
| 265 #endif | |
| 2286 | 266 our_term_source (j_decompress_ptr UNUSED (cinfo)) |
| 428 | 267 { |
| 268 } | |
| 269 | |
| 270 typedef struct | |
| 271 { | |
| 272 struct jpeg_source_mgr pub; | |
| 273 } our_jpeg_source_mgr; | |
| 274 | |
| 275 static void | |
| 665 | 276 jpeg_memory_src (j_decompress_ptr cinfo, JOCTET *data, Bytecount len) |
| 428 | 277 { |
| 278 struct jpeg_source_mgr *src; | |
| 279 | |
| 280 if (cinfo->src == NULL) | |
| 281 { /* first time for this JPEG object? */ | |
| 282 cinfo->src = (struct jpeg_source_mgr *) | |
| 283 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, | |
| 284 sizeof(our_jpeg_source_mgr)); | |
| 285 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 286 src->next_input_byte = data; | |
| 287 } | |
| 288 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 289 src->init_source = our_init_source; | |
| 290 src->fill_input_buffer = our_fill_input_buffer; | |
| 291 src->skip_input_data = our_skip_input_data; | |
| 292 src->resync_to_restart = jpeg_resync_to_restart; /* use default method */ | |
| 293 src->term_source = our_term_source; | |
| 294 src->bytes_in_buffer = len; | |
| 295 src->next_input_byte = data; | |
| 296 } | |
| 297 | |
| 298 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 299 METHODDEF(void) | |
| 300 #else | |
| 301 METHODDEF void | |
| 302 #endif | |
| 303 my_jpeg_error_exit (j_common_ptr cinfo) | |
| 304 { | |
| 305 /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ | |
| 306 struct my_jpeg_error_mgr *myerr = (struct my_jpeg_error_mgr *) cinfo->err; | |
| 307 | |
| 308 /* Return control to the setjmp point */ | |
| 309 longjmp (myerr->setjmp_buffer, 1); | |
| 310 } | |
| 311 | |
| 312 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 313 METHODDEF(void) | |
| 314 #else | |
| 315 METHODDEF void | |
| 316 #endif | |
| 317 my_jpeg_output_message (j_common_ptr cinfo) | |
| 318 { | |
| 771 | 319 Extbyte buffer[JMSG_LENGTH_MAX]; |
| 867 | 320 Ibyte *intbuf; |
| 428 | 321 |
| 322 /* Create the message */ | |
| 323 (*cinfo->err->format_message) (cinfo, buffer); | |
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324 intbuf = EXTERNAL_TO_ITEXT (buffer, Qjpeg_error_message_encoding); |
| 771 | 325 warn_when_safe (Qjpeg, Qinfo, "%s", intbuf); |
| 428 | 326 } |
| 327 | |
| 328 /* The code in this routine is based on example.c from the JPEG library | |
| 329 source code and from gif_instantiate() */ | |
| 330 static void | |
| 331 jpeg_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 332 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 333 int dest_mask, Lisp_Object domain) |
| 334 { | |
| 440 | 335 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 336 /* It is OK for the unwind data to be local to this function, |
| 337 because the unwind-protect is always executed when this | |
| 338 stack frame is still valid. */ | |
| 339 struct jpeg_unwind_data unwind; | |
| 340 int speccount = specpdl_depth (); | |
| 341 | |
| 342 /* This struct contains the JPEG decompression parameters and pointers to | |
| 343 * working space (which is allocated as needed by the JPEG library). | |
| 344 */ | |
| 345 struct jpeg_decompress_struct cinfo; | |
| 346 /* We use our private extension JPEG error handler. | |
| 347 * Note that this struct must live as long as the main JPEG parameter | |
| 348 * struct, to avoid dangling-pointer problems. | |
| 349 */ | |
| 350 struct my_jpeg_error_mgr jerr; | |
| 351 | |
| 352 /* Step -1: First record our unwind-protect, which will clean up after | |
| 353 any exit, normal or not */ | |
| 354 | |
| 355 xzero (unwind); | |
| 356 record_unwind_protect (jpeg_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 357 | |
| 358 /* Step 1: allocate and initialize JPEG decompression object */ | |
| 359 | |
| 360 /* We set up the normal JPEG error routines, then override error_exit. */ | |
| 361 cinfo.err = jpeg_std_error (&jerr.pub); | |
| 362 jerr.pub.error_exit = my_jpeg_error_exit; | |
| 363 jerr.pub.output_message = my_jpeg_output_message; | |
| 364 | |
| 365 /* Establish the setjmp return context for my_error_exit to use. */ | |
| 366 if (setjmp (jerr.setjmp_buffer)) | |
| 367 { | |
| 368 /* If we get here, the JPEG code has signaled an error. | |
| 369 * We need to clean up the JPEG object, close the input file, and return. | |
| 370 */ | |
| 371 | |
| 372 { | |
| 373 Lisp_Object errstring; | |
| 771 | 374 Extbyte buffer[JMSG_LENGTH_MAX]; |
| 428 | 375 |
| 376 /* Create the message */ | |
| 377 (*cinfo.err->format_message) ((j_common_ptr) &cinfo, buffer); | |
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378 errstring = build_extstring (buffer, Qjpeg_error_message_encoding); |
| 428 | 379 |
| 380 signal_image_error_2 ("JPEG decoding error", | |
| 381 errstring, instantiator); | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 /* Now we can initialize the JPEG decompression object. */ | |
| 386 jpeg_create_decompress (&cinfo); | |
| 387 unwind.cinfo_ptr = &cinfo; | |
| 388 | |
| 389 /* Step 2: specify data source (eg, a file) */ | |
| 390 | |
| 391 { | |
| 392 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 393 const Binbyte *bytes; |
| 665 | 394 Bytecount len; |
| 428 | 395 |
| 396 /* #### This is a definite problem under Mule due to the amount of | |
| 397 stack data it might allocate. Need to be able to convert and | |
| 398 write out to a file. */ | |
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399 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 400 jpeg_memory_src (&cinfo, (JOCTET *) bytes, len); |
| 401 } | |
| 402 | |
| 403 /* Step 3: read file parameters with jpeg_read_header() */ | |
| 404 | |
| 405 jpeg_read_header (&cinfo, TRUE); | |
| 406 /* We can ignore the return value from jpeg_read_header since | |
| 407 * (a) suspension is not possible with the stdio data source, and | |
| 408 * (b) we passed TRUE to reject a tables-only JPEG file as an error. | |
| 409 * See libjpeg.doc for more info. | |
| 410 */ | |
| 411 | |
| 412 { | |
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413 UINT_64_BIT pixels_sq; |
| 428 | 414 int jpeg_gray = 0; /* if we're dealing with a grayscale */ |
| 415 /* Step 4: set parameters for decompression. */ | |
| 416 | |
| 417 /* Now that we're using EImages, send all data as 24bit color. | |
| 418 The backend routine will take care of any necessary reductions. | |
| 419 We do have to handle the grayscale case ourselves, however. */ | |
| 420 if (cinfo.jpeg_color_space == JCS_GRAYSCALE) | |
| 421 { | |
| 422 cinfo.out_color_space = JCS_GRAYSCALE; | |
| 423 jpeg_gray = 1; | |
| 424 } | |
| 425 else | |
| 426 { | |
| 427 /* we're relying on the jpeg driver to do any other conversions, | |
| 428 or signal an error if the conversion isn't supported. */ | |
| 429 cinfo.out_color_space = JCS_RGB; | |
| 430 } | |
| 431 | |
| 432 /* Step 5: Start decompressor */ | |
| 433 jpeg_start_decompress (&cinfo); | |
| 434 | |
| 435 /* Step 6: Read in the data and put into EImage format (8bit RGB triples)*/ | |
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436 pixels_sq = |
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437 (UINT_64_BIT) cinfo.output_width * (UINT_64_BIT) cinfo.output_height; |
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438 if (pixels_sq > ((size_t) -1) / 3) |
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439 signal_image_error ("JPEG image too large to instantiate", instantiator); |
| 2367 | 440 unwind.eimage = |
| 441 xnew_binbytes (cinfo.output_width * cinfo.output_height * 3); | |
| 428 | 442 if (!unwind.eimage) |
| 443 signal_image_error("Unable to allocate enough memory for image", instantiator); | |
| 444 | |
| 445 { | |
| 446 JSAMPARRAY row_buffer; /* Output row buffer */ | |
| 447 JSAMPLE *jp; | |
| 448 int row_stride; /* physical row width in output buffer */ | |
| 2367 | 449 Binbyte *op = unwind.eimage; |
| 428 | 450 |
| 451 /* We may need to do some setup of our own at this point before reading | |
| 452 * the data. After jpeg_start_decompress() we have the correct scaled | |
| 453 * output image dimensions available | |
| 454 * We need to make an output work buffer of the right size. | |
| 455 */ | |
| 456 /* JSAMPLEs per row in output buffer. */ | |
| 457 row_stride = cinfo.output_width * cinfo.output_components; | |
| 458 /* Make a one-row-high sample array that will go away when done | |
| 459 with image */ | |
| 460 row_buffer = ((*cinfo.mem->alloc_sarray) | |
| 461 ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1)); | |
| 462 | |
| 463 /* Here we use the library's state variable cinfo.output_scanline as the | |
| 464 * loop counter, so that we don't have to keep track ourselves. | |
| 465 */ | |
| 466 while (cinfo.output_scanline < cinfo.output_height) | |
| 467 { | |
| 468 int i; | |
| 469 | |
| 470 /* jpeg_read_scanlines expects an array of pointers to scanlines. | |
| 471 * Here the array is only one element long, but you could ask for | |
| 472 * more than one scanline at a time if that's more convenient. | |
| 473 */ | |
| 474 (void) jpeg_read_scanlines (&cinfo, row_buffer, 1); | |
| 475 jp = row_buffer[0]; | |
| 647 | 476 for (i = 0; i < (int) cinfo.output_width; i++) |
| 428 | 477 { |
| 478 int clr; | |
| 479 if (jpeg_gray) | |
| 480 { | |
| 2367 | 481 Binbyte val; |
| 428 | 482 #if (BITS_IN_JSAMPLE == 8) |
| 2367 | 483 val = (Binbyte) *jp++; |
| 428 | 484 #else /* other option is 12 */ |
| 2367 | 485 val = (Binbyte) (*jp++ >> 4); |
| 428 | 486 #endif |
| 487 for (clr = 0; clr < 3; clr++) /* copy the same value into RGB */ | |
| 488 *op++ = val; | |
| 489 } | |
| 490 else | |
| 491 { | |
| 492 for (clr = 0; clr < 3; clr++) | |
| 493 #if (BITS_IN_JSAMPLE == 8) | |
| 2367 | 494 *op++ = (Binbyte)*jp++; |
| 428 | 495 #else /* other option is 12 */ |
| 2367 | 496 *op++ = (Binbyte)(*jp++ >> 4); |
| 428 | 497 #endif |
| 498 } | |
| 499 } | |
| 500 } | |
| 501 } | |
| 502 } | |
| 503 | |
| 504 /* Step 6.5: Create the pixmap and set up the image instance */ | |
| 505 /* now instantiate */ | |
| 442 | 506 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 507 init_image_instance_from_eimage, |
| 508 (ii, cinfo.output_width, cinfo.output_height, 1, | |
| 509 unwind.eimage, dest_mask, | |
| 2959 | 510 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 511 |
| 512 /* Step 7: Finish decompression */ | |
| 513 | |
| 514 jpeg_finish_decompress (&cinfo); | |
| 515 /* We can ignore the return value since suspension is not possible | |
| 516 * with the stdio data source. | |
| 517 */ | |
| 518 | |
| 519 /* And we're done! */ | |
| 520 /* This will clean up everything else. */ | |
| 771 | 521 unbind_to (speccount); |
| 428 | 522 } |
| 523 | |
| 524 #endif /* HAVE_JPEG */ | |
| 525 | |
| 526 #ifdef HAVE_GIF | |
| 527 /********************************************************************** | |
| 528 * GIF * | |
| 529 **********************************************************************/ | |
| 530 | |
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531 #include <gif_lib.h> |
| 428 | 532 |
| 533 static void | |
| 534 gif_validate (Lisp_Object instantiator) | |
| 535 { | |
| 536 file_or_data_must_be_present (instantiator); | |
| 537 } | |
| 538 | |
| 539 static Lisp_Object | |
| 442 | 540 gif_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 541 Lisp_Object UNUSED (dest_mask)) |
| 428 | 542 { |
| 543 return simple_image_type_normalize (inst, console_type, Qgif); | |
| 544 } | |
| 545 | |
| 546 static int | |
| 547 gif_possible_dest_types (void) | |
| 548 { | |
| 549 return IMAGE_COLOR_PIXMAP_MASK; | |
| 550 } | |
| 551 | |
| 552 /* To survive the otherwise baffling complexity of making sure | |
| 553 everything gets cleaned up in the presence of an error, we | |
| 554 use an unwind_protect(). */ | |
| 555 | |
| 556 struct gif_unwind_data | |
| 557 { | |
| 2367 | 558 Binbyte *eimage; |
| 428 | 559 /* Object that holds the decoded data from a GIF file */ |
| 560 GifFileType *giffile; | |
| 561 }; | |
| 562 | |
| 563 static Lisp_Object | |
| 564 gif_instantiate_unwind (Lisp_Object unwind_obj) | |
| 565 { | |
| 566 struct gif_unwind_data *data = | |
| 567 (struct gif_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 568 | |
| 569 free_opaque_ptr (unwind_obj); | |
| 570 if (data->giffile) | |
| 571 { | |
| 572 DGifCloseFile (data->giffile); | |
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573 FreeSavedImages(data->giffile); |
| 428 | 574 } |
| 647 | 575 if (data->eimage) |
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576 xfree (data->eimage); |
| 428 | 577 |
| 578 return Qnil; | |
| 579 } | |
| 580 | |
| 581 typedef struct gif_memory_storage | |
| 582 { | |
| 2367 | 583 Binbyte *bytes; /* The data */ |
| 665 | 584 Bytecount len; /* How big is it? */ |
| 585 Bytecount index; /* Where are we? */ | |
| 428 | 586 } gif_memory_storage; |
| 587 | |
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588 static int |
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589 gif_read_from_memory (GifFileType *gif, GifByteType *buf, int size) |
| 428 | 590 { |
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591 gif_memory_storage *mem = (gif_memory_storage *) gif->UserData; |
| 428 | 592 |
| 593 if (size > (mem->len - mem->index)) | |
| 647 | 594 return -1; |
| 595 memcpy (buf, mem->bytes + mem->index, size); | |
| 428 | 596 mem->index = mem->index + size; |
| 597 return size; | |
| 598 } | |
| 599 | |
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600 static const char * |
|
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601 gif_decode_error_string (void) |
| 428 | 602 { |
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603 switch (GifLastError ()) |
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604 { |
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605 case D_GIF_ERR_OPEN_FAILED: |
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606 return "GIF error: unable to open"; |
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607 case D_GIF_ERR_READ_FAILED: |
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608 return "GIF error: read failed"; |
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609 case D_GIF_ERR_NOT_GIF_FILE: |
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610 return "GIF error: not a GIF file"; |
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611 case D_GIF_ERR_NO_SCRN_DSCR: |
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612 return "GIF error: no Screen Descriptor detected"; |
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613 case D_GIF_ERR_NO_IMAG_DSCR: |
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614 return "GIF error: no Image Descriptor detected"; |
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615 case D_GIF_ERR_NO_COLOR_MAP: |
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616 return "GIF error: no global or local color map"; |
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617 case D_GIF_ERR_WRONG_RECORD: |
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618 return "GIF error: wrong record type"; |
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619 case D_GIF_ERR_DATA_TOO_BIG: |
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620 return "GIF error: image is larger than indicated by header"; |
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621 case D_GIF_ERR_NOT_ENOUGH_MEM: |
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622 return "GIF error: out of memory"; |
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623 case D_GIF_ERR_CLOSE_FAILED: |
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624 return "GIF error: failed to close file"; |
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625 case D_GIF_ERR_NOT_READABLE: |
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626 return "GIF error: file is not readable"; |
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627 case D_GIF_ERR_IMAGE_DEFECT: |
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628 return "GIF error: image is defective"; |
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629 case D_GIF_ERR_EOF_TOO_SOON: |
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630 return "GIF error: image EOF detected before image complete"; |
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631 default: |
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632 return "GIF error: unknown error"; |
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633 } |
| 428 | 634 } |
| 635 | |
| 636 static void | |
| 637 gif_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 638 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 639 int dest_mask, Lisp_Object domain) |
| 640 { | |
| 440 | 641 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 642 /* It is OK for the unwind data to be local to this function, |
| 643 because the unwind-protect is always executed when this | |
| 644 stack frame is still valid. */ | |
| 645 struct gif_unwind_data unwind; | |
| 646 int speccount = specpdl_depth (); | |
| 647 gif_memory_storage mem_struct; | |
| 2367 | 648 Binbyte *bytes; |
| 665 | 649 Bytecount len; |
| 428 | 650 int height = 0; |
| 651 int width = 0; | |
| 652 | |
| 653 xzero (unwind); | |
| 654 record_unwind_protect (gif_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 655 | |
| 656 /* 1. Now decode the data. */ | |
| 657 | |
| 658 { | |
| 659 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 660 | |
| 661 assert (!NILP (data)); | |
| 662 | |
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663 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 664 mem_struct.bytes = bytes; |
| 665 mem_struct.len = len; | |
| 666 mem_struct.index = 0; | |
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667 unwind.giffile = DGifOpen (&mem_struct, gif_read_from_memory); |
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668 if (unwind.giffile == NULL) |
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669 signal_image_error (gif_decode_error_string (), instantiator); |
| 428 | 670 |
| 671 /* Then slurp the image into memory, decoding along the way. | |
| 672 The result is the image in a simple one-byte-per-pixel | |
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673 format. */ |
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674 if (DGifSlurp (unwind.giffile) == GIF_ERROR) |
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675 signal_image_error (gif_decode_error_string (), instantiator); |
| 428 | 676 } |
| 677 | |
| 678 /* 3. Now create the EImage(s) */ | |
| 679 { | |
| 680 ColorMapObject *cmo = unwind.giffile->SColorMap; | |
| 681 int i, j, row, pass, interlace, slice; | |
|
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682 UINT_64_BIT pixels_sq; |
| 2367 | 683 Binbyte *eip; |
| 428 | 684 /* interlaced gifs have rows in this order: |
| 685 0, 8, 16, ..., 4, 12, 20, ..., 2, 6, 10, ..., 1, 3, 5, ... */ | |
| 686 static int InterlacedOffset[] = { 0, 4, 2, 1 }; | |
| 687 static int InterlacedJumps[] = { 8, 8, 4, 2 }; | |
| 688 | |
| 689 height = unwind.giffile->SHeight; | |
| 690 width = unwind.giffile->SWidth; | |
|
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691 pixels_sq = (UINT_64_BIT) width * (UINT_64_BIT) height; |
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692 if (pixels_sq > ((size_t) -1) / (3 * unwind.giffile->ImageCount)) |
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693 signal_image_error ("GIF image too large to instantiate", instantiator); |
| 2367 | 694 unwind.eimage = |
| 695 xnew_binbytes (width * height * 3 * unwind.giffile->ImageCount); | |
| 428 | 696 if (!unwind.eimage) |
| 697 signal_image_error("Unable to allocate enough memory for image", instantiator); | |
| 698 | |
| 699 /* write the data in EImage format (8bit RGB triples) */ | |
| 700 | |
| 701 for (slice = 0; slice < unwind.giffile->ImageCount; slice++) | |
| 702 { | |
| 638 | 703 /* We check here that the current image covers the full "screen" size. */ |
| 428 | 704 if (unwind.giffile->SavedImages[slice].ImageDesc.Height != height |
| 705 || unwind.giffile->SavedImages[slice].ImageDesc.Width != width | |
| 706 || unwind.giffile->SavedImages[slice].ImageDesc.Left != 0 | |
| 707 || unwind.giffile->SavedImages[slice].ImageDesc.Top != 0) | |
| 708 signal_image_error ("Image in GIF file is not full size", | |
| 709 instantiator); | |
| 710 | |
| 711 interlace = unwind.giffile->SavedImages[slice].ImageDesc.Interlace; | |
| 712 pass = 0; | |
| 713 row = interlace ? InterlacedOffset[pass] : 0; | |
| 714 eip = unwind.eimage + (width * height * 3 * slice); | |
| 715 for (i = 0; i < height; i++) | |
| 716 { | |
| 717 if (interlace) | |
| 718 if (row >= height) { | |
| 719 row = InterlacedOffset[++pass]; | |
| 720 while (row >= height) | |
| 721 row = InterlacedOffset[++pass]; | |
| 722 } | |
| 723 eip = unwind.eimage + (width * height * 3 * slice) + (row * width * 3); | |
| 724 for (j = 0; j < width; j++) | |
| 725 { | |
| 2367 | 726 Binbyte pixel = |
| 428 | 727 unwind.giffile->SavedImages[slice].RasterBits[(i * width) + j]; |
| 728 *eip++ = cmo->Colors[pixel].Red; | |
| 729 *eip++ = cmo->Colors[pixel].Green; | |
| 730 *eip++ = cmo->Colors[pixel].Blue; | |
| 731 } | |
| 732 row += interlace ? InterlacedJumps[pass] : 1; | |
| 733 } | |
| 734 } | |
| 735 | |
| 736 /* now instantiate */ | |
| 442 | 737 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 738 init_image_instance_from_eimage, |
| 2959 | 739 (ii, width, height, unwind.giffile->ImageCount, |
| 740 unwind.eimage, dest_mask, instantiator, pointer_fg, | |
| 741 pointer_bg, domain)); | |
| 428 | 742 } |
| 743 | |
| 744 /* We read the gif successfully. If we have more than one slice then | |
| 745 animate the gif. */ | |
| 746 if (unwind.giffile->ImageCount > 1) | |
| 747 { | |
| 748 /* See if there is a timeout value. In theory there could be one | |
|
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749 for every image - but that makes the implementation way too |
| 428 | 750 complicated for now so we just take the first. */ |
| 751 unsigned short timeout = 0; | |
| 752 Lisp_Object tid; | |
| 753 | |
| 754 if (unwind.giffile->SavedImages[0].Function == GRAPHICS_EXT_FUNC_CODE | |
| 755 && | |
| 756 unwind.giffile->SavedImages[0].ExtensionBlockCount) | |
| 757 { | |
| 758 timeout = (unsigned short) | |
| 438 | 759 ((unwind.giffile->SavedImages[0].ExtensionBlocks[0].Bytes[2] << 8) + |
| 428 | 760 unwind.giffile-> SavedImages[0].ExtensionBlocks[0].Bytes[1]) * 10; |
| 761 } | |
| 762 | |
| 763 /* Too short a timeout will crucify us performance-wise. */ | |
| 764 tid = add_glyph_animated_timeout (timeout > 10 ? timeout : 10, image_instance); | |
| 765 | |
| 766 if (!NILP (tid)) | |
| 767 IMAGE_INSTANCE_PIXMAP_TIMEOUT (ii) = XINT (tid); | |
| 768 } | |
| 438 | 769 |
| 771 | 770 unbind_to (speccount); |
| 428 | 771 } |
| 772 | |
| 773 #endif /* HAVE_GIF */ | |
| 774 | |
| 775 | |
| 776 #ifdef HAVE_PNG | |
| 777 | |
| 778 /********************************************************************** | |
| 779 * PNG * | |
| 780 **********************************************************************/ | |
| 781 static void | |
| 782 png_validate (Lisp_Object instantiator) | |
| 783 { | |
| 784 file_or_data_must_be_present (instantiator); | |
| 785 } | |
| 786 | |
| 787 static Lisp_Object | |
| 442 | 788 png_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 789 Lisp_Object UNUSED (dest_mask)) |
| 428 | 790 { |
| 791 return simple_image_type_normalize (inst, console_type, Qpng); | |
| 792 } | |
| 793 | |
| 794 static int | |
| 795 png_possible_dest_types (void) | |
| 796 { | |
| 797 return IMAGE_COLOR_PIXMAP_MASK; | |
| 798 } | |
| 799 | |
| 800 struct png_memory_storage | |
| 801 { | |
| 2367 | 802 const Binbyte *bytes; /* The data */ |
| 665 | 803 Bytecount len; /* How big is it? */ |
| 804 Bytecount index; /* Where are we? */ | |
| 428 | 805 }; |
| 806 | |
| 807 static void | |
| 647 | 808 png_read_from_memory (png_structp png_ptr, png_bytep data, |
| 809 png_size_t length) | |
| 428 | 810 { |
| 811 struct png_memory_storage *tbr = | |
| 812 (struct png_memory_storage *) png_get_io_ptr (png_ptr); | |
| 813 | |
| 665 | 814 if ((Bytecount) length > (tbr->len - tbr->index)) |
| 428 | 815 png_error (png_ptr, (png_const_charp) "Read Error"); |
| 647 | 816 memcpy (data, tbr->bytes + tbr->index,length); |
| 428 | 817 tbr->index = tbr->index + length; |
| 818 } | |
| 819 | |
| 820 struct png_error_struct | |
| 821 { | |
| 442 | 822 const char *err_str; |
| 428 | 823 jmp_buf setjmp_buffer; /* for return to caller */ |
| 824 }; | |
| 825 | |
| 826 /* jh 98/03/12 - #### AARRRGH! libpng includes jmp_buf inside its own | |
| 827 structure, and there are cases where the size can be different from | |
| 828 between inside the library, and inside the code! To do an end run | |
| 829 around this, use our own error functions, and don't rely on things | |
| 830 passed in the png_ptr to them. This is an ugly hack and must | |
| 831 go away when the lisp engine is threaded! */ | |
| 832 static struct png_error_struct png_err_stct; | |
| 833 | |
| 834 static void | |
| 2286 | 835 png_error_func (png_structp UNUSED (png_ptr), png_const_charp msg) |
| 428 | 836 { |
| 837 png_err_stct.err_str = msg; | |
| 838 longjmp (png_err_stct.setjmp_buffer, 1); | |
| 839 } | |
| 840 | |
| 841 static void | |
| 2286 | 842 png_warning_func (png_structp UNUSED (png_ptr), png_const_charp msg) |
| 428 | 843 { |
| 3734 | 844 DECLARE_EISTRING (eimsg); |
| 845 | |
| 846 eicpy_ext(eimsg, msg, Qbinary); | |
| 847 warn_when_safe (Qpng, Qinfo, "%s", eidata(eimsg)); | |
| 428 | 848 } |
| 849 | |
| 850 struct png_unwind_data | |
| 851 { | |
| 852 FILE *instream; | |
| 2367 | 853 Binbyte *eimage; |
| 428 | 854 png_structp png_ptr; |
| 855 png_infop info_ptr; | |
| 856 }; | |
| 857 | |
| 858 static Lisp_Object | |
| 859 png_instantiate_unwind (Lisp_Object unwind_obj) | |
| 860 { | |
| 861 struct png_unwind_data *data = | |
| 862 (struct png_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 863 | |
| 864 free_opaque_ptr (unwind_obj); | |
| 865 if (data->png_ptr) | |
| 3839 | 866 { |
| 867 /* ensure we can't get here again */ | |
| 868 png_structp tmp = data->png_ptr; | |
| 869 data->png_ptr = NULL; | |
| 870 png_destroy_read_struct (&tmp, &(data->info_ptr), (png_infopp)NULL); | |
| 871 } | |
| 872 | |
| 428 | 873 if (data->instream) |
| 771 | 874 retry_fclose (data->instream); |
| 428 | 875 |
| 1726 | 876 if (data->eimage) |
|
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|
877 xfree (data->eimage); |
| 428 | 878 |
| 879 return Qnil; | |
| 880 } | |
| 881 | |
| 882 static void | |
| 883 png_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 884 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 885 int dest_mask, Lisp_Object domain) |
| 886 { | |
| 440 | 887 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 888 struct png_unwind_data unwind; |
| 889 int speccount = specpdl_depth (); | |
| 890 int height, width; | |
| 891 struct png_memory_storage tbr; /* Data to be read */ | |
| 892 | |
| 893 /* PNG variables */ | |
| 894 png_structp png_ptr; | |
| 895 png_infop info_ptr; | |
| 896 | |
| 3839 | 897 xzero (unwind); |
| 898 record_unwind_protect (png_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 899 | |
| 900 if (setjmp (png_err_stct.setjmp_buffer)) | |
| 901 { | |
| 902 /* Something blew up: | |
| 903 just display the error (cleanup happens in the unwind) */ | |
| 904 signal_image_error_2 ("Error decoding PNG", | |
|
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|
905 build_extstring (png_err_stct.err_str, |
|
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|
906 Qerror_message_encoding), |
| 3839 | 907 instantiator); |
| 908 } | |
| 909 | |
| 428 | 910 /* Initialize all PNG structures */ |
| 3839 | 911 png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, |
| 912 (void *) &png_err_stct, | |
| 428 | 913 png_error_func, png_warning_func); |
| 914 if (!png_ptr) | |
| 915 signal_image_error ("Error obtaining memory for png_read", instantiator); | |
| 3839 | 916 unwind.png_ptr = png_ptr; |
| 917 | |
| 428 | 918 info_ptr = png_create_info_struct (png_ptr); |
| 919 if (!info_ptr) | |
| 920 { | |
| 3839 | 921 unwind.png_ptr = NULL; /* avoid re-calling png_destroy_read_struct |
| 922 when unwinding */ | |
| 428 | 923 png_destroy_read_struct (&png_ptr, (png_infopp)NULL, (png_infopp)NULL); |
| 924 signal_image_error ("Error obtaining memory for png_read", instantiator); | |
| 925 } | |
| 926 unwind.info_ptr = info_ptr; | |
| 927 | |
| 928 /* This code is a mixture of stuff from Ben's GIF/JPEG stuff from | |
| 929 this file, example.c from the libpng 0.81 distribution, and the | |
| 930 pngtopnm sources. -WMP- | |
| 931 */ | |
| 932 /* It has been further modified to handle the API changes for 0.96, | |
| 933 and is no longer usable for previous versions. jh | |
| 934 */ | |
| 935 | |
| 936 /* Initialize the IO layer and read in header information */ | |
| 937 { | |
| 938 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 939 const Binbyte *bytes; |
| 665 | 940 Bytecount len; |
| 428 | 941 |
| 942 assert (!NILP (data)); | |
| 943 | |
| 944 /* #### This is a definite problem under Mule due to the amount of | |
| 945 stack data it might allocate. Need to think about using Lstreams */ | |
|
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946 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 947 tbr.bytes = bytes; |
| 948 tbr.len = len; | |
| 949 tbr.index = 0; | |
| 950 png_set_read_fn (png_ptr,(void *) &tbr, png_read_from_memory); | |
| 951 } | |
| 952 | |
| 953 png_read_info (png_ptr, info_ptr); | |
| 954 | |
| 955 { | |
|
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|
956 int y, padding; |
| 2367 | 957 Binbyte **row_pointers; |
|
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958 UINT_64_BIT pixels_sq; |
| 428 | 959 height = info_ptr->height; |
| 960 width = info_ptr->width; | |
|
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961 pixels_sq = (UINT_64_BIT) width * (UINT_64_BIT) height; |
|
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962 if (pixels_sq > ((size_t) -1) / 3) |
|
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963 signal_image_error ("PNG image too large to instantiate", instantiator); |
| 428 | 964 |
|
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965 /* Wow, allocate all the memory. Truly, exciting. |
|
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966 Well, yes, there's excitement to be had. It turns out that libpng |
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967 strips in place, so the last row overruns the buffer if depth is 16 |
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968 or there's an alpha channel. This is a crash on Linux. So we need |
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|
969 to add padding. |
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|
970 The worst case is reducing 8 bytes (16-bit RGBA) to 3 (8-bit RGB). */ |
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parents:
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971 |
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972 padding = 5 * width; |
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973 unwind.eimage = xnew_array_and_zero (Binbyte, |
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974 (size_t) (pixels_sq * 3 + padding)); |
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parents:
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975 |
| 428 | 976 /* libpng expects that the image buffer passed in contains a |
| 977 picture to draw on top of if the png has any transparencies. | |
| 978 This could be a good place to pass that in... */ | |
| 979 | |
| 980 row_pointers = xnew_array (png_byte *, height); | |
| 981 for (y = 0; y < height; y++) | |
| 982 row_pointers[y] = unwind.eimage + (width * 3 * y); | |
| 983 | |
| 984 { | |
| 985 /* if the png specifies a background chunk, go ahead and | |
| 986 use it, else use what we can get from the default face. */ | |
| 987 png_color_16 my_background, *image_background; | |
| 988 Lisp_Object bkgd = Qnil; | |
| 989 | |
| 990 my_background.red = 0x7fff; | |
| 991 my_background.green = 0x7fff; | |
| 992 my_background.blue = 0x7fff; | |
| 993 bkgd = FACE_BACKGROUND (Vdefault_face, domain); | |
| 994 if (!COLOR_INSTANCEP (bkgd)) | |
| 995 { | |
| 996 warn_when_safe (Qpng, Qinfo, "Couldn't get background color!"); | |
| 997 } | |
| 998 else | |
| 999 { | |
|
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1000 Lisp_Color_Instance *c = XCOLOR_INSTANCE (bkgd); |
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1001 Lisp_Object rgb = MAYBE_LISP_DEVMETH (XDEVICE (c->device), |
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1002 color_instance_rgb_components, |
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1003 (c)); |
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1004 #define GETCOLOR(col) my_background.col = (unsigned short) XINT (XCAR (rgb)) |
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1005 GETCOLOR(red); rgb = XCDR (rgb); |
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1006 GETCOLOR(green); rgb = XCDR (rgb); |
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1007 GETCOLOR(blue); |
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1008 #undef GETCOLOR |
| 428 | 1009 } |
| 1010 | |
| 1011 if (png_get_bKGD (png_ptr, info_ptr, &image_background)) | |
| 1012 png_set_background (png_ptr, image_background, | |
| 1013 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); | |
| 1014 else | |
| 1015 png_set_background (png_ptr, &my_background, | |
| 1016 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); | |
| 1017 } | |
| 1018 | |
| 1019 /* Now that we're using EImage, ask for 8bit RGB triples for any type | |
| 1020 of image*/ | |
|
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1021 /* convert palette images to RGB */ |
| 428 | 1022 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
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1023 png_set_palette_to_rgb (png_ptr); |
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1024 /* convert grayscale images to RGB */ |
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1025 else if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY || |
| 428 | 1026 info_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) |
| 1027 png_set_gray_to_rgb (png_ptr); | |
|
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1028 /* pad images with depth < 8 bits */ |
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1029 else if (info_ptr->bit_depth < 8) |
| 428 | 1030 { |
| 1031 if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY) | |
| 1032 png_set_expand (png_ptr); | |
| 1033 else | |
| 1034 png_set_packing (png_ptr); | |
| 1035 } | |
|
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1036 /* strip 16-bit depth files down to 8 bits */ |
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1037 if (info_ptr->bit_depth == 16) |
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1038 png_set_strip_16 (png_ptr); |
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1039 /* strip alpha channel |
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1040 #### shouldn't we handle this? |
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1041 first call png_read_update_info in case above transformations |
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1042 have generated an alpha channel */ |
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1043 png_read_update_info(png_ptr, info_ptr); |
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1044 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) |
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changeset
|
1045 png_set_strip_alpha (png_ptr); |
| 428 | 1046 |
| 1047 png_read_image (png_ptr, row_pointers); | |
| 1048 png_read_end (png_ptr, info_ptr); | |
| 1049 | |
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1050 /* #### There should be some way to pass this type of data down |
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parents:
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1051 * into the glyph code, where you can get to it from lisp |
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1052 * anyway. - WMP */ |
| 428 | 1053 { |
| 1054 int i; | |
| 3734 | 1055 DECLARE_EISTRING (key); |
| 1056 DECLARE_EISTRING (text); | |
| 428 | 1057 |
| 1058 for (i = 0 ; i < info_ptr->num_text ; i++) | |
| 1059 { | |
| 1060 /* How paranoid do I have to be about no trailing NULLs, and | |
| 1061 using (int)info_ptr->text[i].text_length, and strncpy and a temp | |
| 1062 string somewhere? */ | |
| 3734 | 1063 eireset(key); |
| 1064 eireset(text); | |
| 1065 eicpy_ext(key, info_ptr->text[i].key, Qbinary); | |
| 1066 eicpy_ext(text, info_ptr->text[i].text, Qbinary); | |
| 428 | 1067 |
| 1068 warn_when_safe (Qpng, Qinfo, "%s - %s", | |
| 3734 | 1069 eidata(key), eidata(text)); |
| 428 | 1070 } |
| 1071 } | |
| 1072 | |
|
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|
1073 xfree (row_pointers); |
| 428 | 1074 } |
| 1075 | |
| 1076 /* now instantiate */ | |
| 442 | 1077 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 1078 init_image_instance_from_eimage, |
| 1079 (ii, width, height, 1, unwind.eimage, dest_mask, | |
| 2959 | 1080 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 1081 |
| 1082 /* This will clean up everything else. */ | |
| 771 | 1083 unbind_to (speccount); |
| 428 | 1084 } |
| 1085 | |
| 1086 #endif /* HAVE_PNG */ | |
| 1087 | |
| 1088 | |
| 1089 #ifdef HAVE_TIFF | |
| 1090 #include "tiffio.h" | |
| 1091 | |
| 1092 /********************************************************************** | |
| 1093 * TIFF * | |
| 1094 **********************************************************************/ | |
| 1095 static void | |
| 1096 tiff_validate (Lisp_Object instantiator) | |
| 1097 { | |
| 1098 file_or_data_must_be_present (instantiator); | |
| 1099 } | |
| 1100 | |
| 1101 static Lisp_Object | |
| 442 | 1102 tiff_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 1103 Lisp_Object UNUSED (dest_mask)) |
| 428 | 1104 { |
| 1105 return simple_image_type_normalize (inst, console_type, Qtiff); | |
| 1106 } | |
| 1107 | |
| 1108 static int | |
| 1109 tiff_possible_dest_types (void) | |
| 1110 { | |
| 1111 return IMAGE_COLOR_PIXMAP_MASK; | |
| 1112 } | |
| 1113 | |
| 1114 struct tiff_unwind_data | |
| 1115 { | |
| 2367 | 1116 Binbyte *eimage; |
| 428 | 1117 /* Object that holds the decoded data from a TIFF file */ |
| 1118 TIFF *tiff; | |
| 1119 }; | |
| 1120 | |
| 1121 static Lisp_Object | |
| 1122 tiff_instantiate_unwind (Lisp_Object unwind_obj) | |
| 1123 { | |
| 1124 struct tiff_unwind_data *data = | |
| 1125 (struct tiff_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 1126 | |
| 1127 free_opaque_ptr (unwind_obj); | |
| 1128 if (data->tiff) | |
| 1129 { | |
| 1130 TIFFClose(data->tiff); | |
| 1131 } | |
| 1132 if (data->eimage) | |
|
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|
1133 xfree (data->eimage); |
| 428 | 1134 |
| 1135 return Qnil; | |
| 1136 } | |
| 1137 | |
| 1138 typedef struct tiff_memory_storage | |
| 1139 { | |
| 2367 | 1140 Binbyte *bytes; /* The data */ |
| 665 | 1141 Bytecount len; /* How big is it? */ |
| 1142 Bytecount index; /* Where are we? */ | |
| 428 | 1143 } tiff_memory_storage; |
| 1144 | |
| 1145 static size_t | |
| 647 | 1146 tiff_memory_read (thandle_t data, tdata_t buf, tsize_t size) |
| 428 | 1147 { |
| 647 | 1148 tiff_memory_storage *mem = (tiff_memory_storage *) data; |
| 428 | 1149 |
| 665 | 1150 if ((Bytecount) size > (mem->len - mem->index)) |
| 428 | 1151 return (size_t) -1; |
| 647 | 1152 memcpy (buf, mem->bytes + mem->index, size); |
| 428 | 1153 mem->index = mem->index + size; |
| 1154 return size; | |
| 1155 } | |
| 1156 | |
| 647 | 1157 static size_t |
| 2286 | 1158 tiff_memory_write (thandle_t UNUSED (data), tdata_t UNUSED (buf), |
| 1159 tsize_t UNUSED (size)) | |
| 428 | 1160 { |
| 2500 | 1161 ABORT(); |
| 2270 | 1162 return 0; |
| 428 | 1163 } |
| 1164 | |
| 647 | 1165 static toff_t |
| 1166 tiff_memory_seek (thandle_t data, toff_t off, int whence) | |
| 428 | 1167 { |
| 647 | 1168 tiff_memory_storage *mem = (tiff_memory_storage *) data; |
| 428 | 1169 int newidx; |
| 647 | 1170 switch(whence) |
| 1171 { | |
| 1172 case SEEK_SET: | |
| 1173 newidx = off; | |
| 1174 break; | |
| 1175 case SEEK_END: | |
| 1176 newidx = mem->len + off; | |
| 1177 break; | |
| 1178 case SEEK_CUR: | |
| 1179 newidx = mem->index + off; | |
| 1180 break; | |
| 1181 default: | |
| 1182 fprintf (stderr, "Eh? invalid seek mode in tiff_memory_seek\n"); | |
| 1183 return (toff_t) -1; | |
| 1184 } | |
| 428 | 1185 |
| 1186 if ((newidx > mem->len) || (newidx < 0)) | |
| 593 | 1187 return (toff_t) -1; |
| 428 | 1188 |
| 1189 mem->index = newidx; | |
| 1190 return newidx; | |
| 1191 } | |
| 1192 | |
| 1193 static int | |
| 2286 | 1194 tiff_memory_close (thandle_t UNUSED (data)) |
| 428 | 1195 { |
| 1196 return 0; | |
| 1197 } | |
| 1198 | |
| 1199 static int | |
| 2286 | 1200 tiff_map_noop (thandle_t UNUSED (data), tdata_t* UNUSED (pbase), |
| 1201 toff_t* UNUSED (psize)) | |
| 428 | 1202 { |
| 1203 return 0; | |
| 1204 } | |
| 1205 | |
| 1206 static void | |
| 2286 | 1207 tiff_unmap_noop (thandle_t UNUSED (data), tdata_t UNUSED (pbase), |
| 1208 toff_t UNUSED (psize)) | |
| 428 | 1209 { |
| 1210 return; | |
| 1211 } | |
| 1212 | |
| 1213 static toff_t | |
| 647 | 1214 tiff_memory_size (thandle_t data) |
| 428 | 1215 { |
| 1216 tiff_memory_storage *mem = (tiff_memory_storage*)data; | |
| 1217 return mem->len; | |
| 1218 } | |
| 1219 | |
| 1220 struct tiff_error_struct | |
| 1221 { | |
| 438 | 1222 #ifdef HAVE_VSNPRINTF |
| 428 | 1223 char err_str[256]; |
| 1224 #else | |
| 1225 char err_str[1024]; /* return the error string */ | |
| 1226 #endif | |
| 1227 jmp_buf setjmp_buffer; /* for return to caller */ | |
| 1228 }; | |
| 1229 | |
| 1230 /* jh 98/03/12 - ###This struct for passing data to the error functions | |
| 1231 is an ugly hack caused by the fact that libtiff (as of v3.4) doesn't | |
| 1232 have any place to store error func data. This should be rectified | |
| 1233 before XEmacs gets threads! */ | |
| 1234 static struct tiff_error_struct tiff_err_data; | |
| 1235 | |
| 1236 static void | |
| 2286 | 1237 tiff_error_func (const char *UNUSED (module), const char *fmt, ...) |
| 428 | 1238 { |
| 1239 va_list vargs; | |
| 1240 | |
| 1241 va_start (vargs, fmt); | |
| 438 | 1242 #ifdef HAVE_VSNPRINTF |
| 428 | 1243 vsnprintf (tiff_err_data.err_str, 255, fmt, vargs); |
| 1244 #else | |
| 1245 /* pray this doesn't overflow... */ | |
| 1246 vsprintf (tiff_err_data.err_str, fmt, vargs); | |
| 1247 #endif | |
| 1248 va_end (vargs); | |
| 1249 /* return to setjmp point */ | |
| 1250 longjmp (tiff_err_data.setjmp_buffer, 1); | |
| 1251 } | |
| 1252 | |
| 1253 static void | |
| 647 | 1254 tiff_warning_func (const char *module, const char *fmt, ...) |
| 428 | 1255 { |
| 1256 va_list vargs; | |
| 438 | 1257 #ifdef HAVE_VSNPRINTF |
| 428 | 1258 char warn_str[256]; |
| 1259 #else | |
| 1260 char warn_str[1024]; | |
| 1261 #endif | |
| 3734 | 1262 DECLARE_EISTRING (eimodule); |
| 1263 DECLARE_EISTRING (eiwarnstr); | |
| 428 | 1264 |
| 1265 va_start (vargs, fmt); | |
| 438 | 1266 #ifdef HAVE_VSNPRINTF |
| 428 | 1267 vsnprintf (warn_str, 255, fmt, vargs); |
| 1268 #else | |
| 1269 vsprintf (warn_str, fmt, vargs); | |
| 1270 #endif | |
| 1271 va_end (vargs); | |
| 3734 | 1272 |
| 1273 eicpy_ext(eimodule, module, Qbinary); | |
| 1274 eicpy_ext(eiwarnstr, warn_str, Qbinary); | |
| 1275 | |
| 428 | 1276 warn_when_safe (Qtiff, Qinfo, "%s - %s", |
| 3734 | 1277 eidata(eimodule), |
| 1278 eidata(eiwarnstr)); | |
| 428 | 1279 } |
| 1280 | |
| 1281 static void | |
| 1282 tiff_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 1283 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 1284 int dest_mask, Lisp_Object domain) |
| 1285 { | |
| 440 | 1286 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 1287 tiff_memory_storage mem_struct; |
| 1288 /* It is OK for the unwind data to be local to this function, | |
| 1289 because the unwind-protect is always executed when this | |
| 1290 stack frame is still valid. */ | |
| 1291 struct tiff_unwind_data unwind; | |
| 1292 int speccount = specpdl_depth (); | |
| 1293 uint32 width, height; | |
| 1294 | |
| 1295 xzero (unwind); | |
| 1296 record_unwind_protect (tiff_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 1297 | |
| 1298 /* set up error facilities */ | |
| 1299 if (setjmp (tiff_err_data.setjmp_buffer)) | |
| 1300 { | |
| 1301 /* An error was signaled. No clean up is needed, as unwind handles that | |
| 1302 for us. Just pass the error along. */ | |
| 1303 signal_image_error_2 ("TIFF decoding error", | |
|
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diff
changeset
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1304 build_extstring (tiff_err_data.err_str, |
|
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Ben Wing <ben@xemacs.org>
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4854
diff
changeset
|
1305 Qerror_message_encoding), |
| 428 | 1306 instantiator); |
| 1307 } | |
| 1308 TIFFSetErrorHandler ((TIFFErrorHandler)tiff_error_func); | |
| 1309 TIFFSetWarningHandler ((TIFFErrorHandler)tiff_warning_func); | |
| 1310 { | |
| 1311 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 1312 Binbyte *bytes; |
| 665 | 1313 Bytecount len; |
| 428 | 1314 |
| 1315 uint32 *raster; | |
| 2367 | 1316 Binbyte *ep; |
|
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|
1317 UINT_64_BIT pixels_sq; |
| 428 | 1318 |
| 1319 assert (!NILP (data)); | |
| 1320 | |
| 1321 /* #### This is a definite problem under Mule due to the amount of | |
| 1322 stack data it might allocate. Think about Lstreams... */ | |
|
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1323 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 1324 mem_struct.bytes = bytes; |
| 1325 mem_struct.len = len; | |
| 1326 mem_struct.index = 0; | |
| 1327 | |
| 442 | 1328 unwind.tiff = TIFFClientOpen ("memfile", "r", (thandle_t) &mem_struct, |
| 428 | 1329 (TIFFReadWriteProc)tiff_memory_read, |
| 1330 (TIFFReadWriteProc)tiff_memory_write, | |
| 1331 tiff_memory_seek, tiff_memory_close, tiff_memory_size, | |
| 1332 tiff_map_noop, tiff_unmap_noop); | |
| 1333 if (!unwind.tiff) | |
| 440 | 1334 signal_image_error ("Insufficient memory to instantiate TIFF image", instantiator); |
| 428 | 1335 |
| 1336 TIFFGetField (unwind.tiff, TIFFTAG_IMAGEWIDTH, &width); | |
| 1337 TIFFGetField (unwind.tiff, TIFFTAG_IMAGELENGTH, &height); | |
|
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changeset
|
1338 pixels_sq = (UINT_64_BIT) width * (UINT_64_BIT) height; |
|
6c6bfdb80a0c
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parents:
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diff
changeset
|
1339 if (pixels_sq >= 1 << 29) |
|
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parents:
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diff
changeset
|
1340 signal_image_error ("TIFF image too large to instantiate", instantiator); |
|
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diff
changeset
|
1341 unwind.eimage = xnew_binbytes ((size_t) pixels_sq * 3); |
| 428 | 1342 |
| 440 | 1343 /* #### This is little more than proof-of-concept/function testing. |
| 428 | 1344 It needs to be reimplemented via scanline reads for both memory |
| 1345 compactness. */ | |
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|
1346 raster = (uint32*) _TIFFmalloc ((tsize_t) (pixels_sq * sizeof (uint32))); |
| 428 | 1347 if (raster != NULL) |
| 1348 { | |
| 647 | 1349 int i, j; |
| 428 | 1350 uint32 *rp; |
| 1351 ep = unwind.eimage; | |
| 1352 rp = raster; | |
| 1353 if (TIFFReadRGBAImage (unwind.tiff, width, height, raster, 0)) | |
| 1354 { | |
| 1355 for (i = height - 1; i >= 0; i--) | |
| 1356 { | |
| 1357 /* This is to get around weirdness in the libtiff library where properly | |
| 1358 made TIFFs will come out upside down. libtiff bug or jhod-brainlock? */ | |
| 1359 rp = raster + (i * width); | |
| 647 | 1360 for (j = 0; j < (int) width; j++) |
| 428 | 1361 { |
| 2367 | 1362 *ep++ = (Binbyte)TIFFGetR(*rp); |
| 1363 *ep++ = (Binbyte)TIFFGetG(*rp); | |
| 1364 *ep++ = (Binbyte)TIFFGetB(*rp); | |
| 428 | 1365 rp++; |
| 1366 } | |
| 1367 } | |
| 1368 } | |
| 1369 _TIFFfree (raster); | |
| 1370 } else | |
| 1371 signal_image_error ("Unable to allocate memory for TIFFReadRGBA", instantiator); | |
| 1372 | |
| 1373 } | |
| 1374 | |
| 1375 /* now instantiate */ | |
| 442 | 1376 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 1377 init_image_instance_from_eimage, |
| 1378 (ii, width, height, 1, unwind.eimage, dest_mask, | |
| 2959 | 1379 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 1380 |
| 771 | 1381 unbind_to (speccount); |
| 428 | 1382 } |
| 1383 | |
| 1384 #endif /* HAVE_TIFF */ | |
| 1385 | |
| 1386 | |
| 1387 /************************************************************************/ | |
| 1388 /* initialization */ | |
| 1389 /************************************************************************/ | |
| 1390 | |
| 1391 void | |
| 1392 syms_of_glyphs_eimage (void) | |
| 1393 { | |
| 1394 } | |
| 1395 | |
| 1396 void | |
| 1397 image_instantiator_format_create_glyphs_eimage (void) | |
| 1398 { | |
| 1399 /* image-instantiator types */ | |
| 1400 #ifdef HAVE_JPEG | |
| 1401 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (jpeg, "jpeg"); | |
| 1402 | |
| 1403 IIFORMAT_HAS_METHOD (jpeg, validate); | |
| 1404 IIFORMAT_HAS_METHOD (jpeg, normalize); | |
| 1405 IIFORMAT_HAS_METHOD (jpeg, possible_dest_types); | |
| 1406 IIFORMAT_HAS_METHOD (jpeg, instantiate); | |
| 1407 | |
| 1408 IIFORMAT_VALID_KEYWORD (jpeg, Q_data, check_valid_string); | |
| 1409 IIFORMAT_VALID_KEYWORD (jpeg, Q_file, check_valid_string); | |
| 1410 #endif | |
| 1411 | |
| 1412 #ifdef HAVE_GIF | |
| 1413 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (gif, "gif"); | |
| 1414 | |
| 1415 IIFORMAT_HAS_METHOD (gif, validate); | |
| 1416 IIFORMAT_HAS_METHOD (gif, normalize); | |
| 1417 IIFORMAT_HAS_METHOD (gif, possible_dest_types); | |
| 1418 IIFORMAT_HAS_METHOD (gif, instantiate); | |
| 1419 | |
| 1420 IIFORMAT_VALID_KEYWORD (gif, Q_data, check_valid_string); | |
| 1421 IIFORMAT_VALID_KEYWORD (gif, Q_file, check_valid_string); | |
| 1422 #endif | |
| 1423 | |
| 1424 #ifdef HAVE_PNG | |
| 1425 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (png, "png"); | |
| 1426 | |
| 1427 IIFORMAT_HAS_METHOD (png, validate); | |
| 1428 IIFORMAT_HAS_METHOD (png, normalize); | |
| 1429 IIFORMAT_HAS_METHOD (png, possible_dest_types); | |
| 1430 IIFORMAT_HAS_METHOD (png, instantiate); | |
| 1431 | |
| 1432 IIFORMAT_VALID_KEYWORD (png, Q_data, check_valid_string); | |
| 1433 IIFORMAT_VALID_KEYWORD (png, Q_file, check_valid_string); | |
| 1434 #endif | |
| 1435 | |
| 1436 #ifdef HAVE_TIFF | |
| 1437 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (tiff, "tiff"); | |
| 1438 | |
| 1439 IIFORMAT_HAS_METHOD (tiff, validate); | |
| 1440 IIFORMAT_HAS_METHOD (tiff, normalize); | |
| 1441 IIFORMAT_HAS_METHOD (tiff, possible_dest_types); | |
| 1442 IIFORMAT_HAS_METHOD (tiff, instantiate); | |
| 1443 | |
| 1444 IIFORMAT_VALID_KEYWORD (tiff, Q_data, check_valid_string); | |
| 1445 IIFORMAT_VALID_KEYWORD (tiff, Q_file, check_valid_string); | |
| 1446 #endif | |
| 1447 | |
| 1448 } | |
| 1449 | |
| 1450 void | |
| 1451 vars_of_glyphs_eimage (void) | |
| 1452 { | |
| 1453 #ifdef HAVE_JPEG | |
| 1454 Fprovide (Qjpeg); | |
| 1455 #endif | |
| 1456 | |
| 1457 #ifdef HAVE_GIF | |
| 1458 Fprovide (Qgif); | |
| 1459 #endif | |
| 1460 | |
| 1461 #ifdef HAVE_PNG | |
| 1462 Fprovide (Qpng); | |
| 1463 #endif | |
| 1464 | |
| 1465 #ifdef HAVE_TIFF | |
| 1466 Fprovide (Qtiff); | |
| 1467 #endif | |
| 1468 | |
| 1469 } |