Mercurial > hg > xemacs-beta
annotate src/glyphs-eimage.c @ 5533:11da5b828d10
shell-command and shell-command-on-region API compliant with FSF 23.3.1
| author | Mats Lidell <mats.lidell@cag.se> |
|---|---|
| date | Sun, 31 Jul 2011 01:29:09 +0200 |
| parents | ac37a5f7e5be |
| children | bbcf3f979099 |
| 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 | |
|
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5 Copyright (C) 1995, 1996, 2001, 2002, 2004, 2005, 2010 Ben Wing |
| 428 | 6 Copyright (C) 1995 Sun Microsystems |
| 7 | |
| 8 This file is part of XEmacs. | |
| 9 | |
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10 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 11 under the terms of the GNU General Public License as published by the |
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12 Free Software Foundation, either version 3 of the License, or (at your |
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13 option) any later version. |
| 428 | 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 | |
|
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21 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 22 |
| 23 /* Synched up with: Not in FSF. */ | |
| 24 | |
| 2959 | 25 /* Originally part of glyphs.c. |
| 26 | |
| 428 | 27 GIF/JPEG support added by Ben Wing for 19.14 |
| 28 PNG support added by Bill Perry for 19.14 | |
| 29 Improved GIF/JPEG support added by Bill Perry for 19.14 | |
| 30 Cleanup/simplification of error handling by Ben Wing for 19.14 | |
| 31 GIF support changed to external Gifreader lib by Jareth Hein for 21.0 | |
| 32 Many changes for color work and optimizations by Jareth Hein for 21.0 | |
| 33 Switch of GIF/JPEG/PNG to new EImage intermediate code by Jareth Hein for 21.0 | |
| 34 TIFF code by Jareth Hein for 21.0 | |
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35 GIF support changed to external giflib by Jerry James for 21.5 |
| 428 | 36 TODO: |
| 37 Convert images.el to C and stick it in here? | |
| 3094 | 38 This file is really repetitious; can we refactor? |
| 428 | 39 */ |
| 40 | |
| 41 #include <config.h> | |
| 42 #include "lisp.h" | |
| 43 #include "lstream.h" | |
| 44 #include "console.h" | |
| 872 | 45 #include "device-impl.h" |
| 428 | 46 #include "faces.h" |
| 47 #include "glyphs.h" | |
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48 #include "fontcolor-impl.h" |
| 428 | 49 |
| 50 #include "buffer.h" | |
| 51 #include "frame.h" | |
| 52 #include "opaque.h" | |
| 442 | 53 #include "window.h" |
| 428 | 54 |
| 55 #include "sysfile.h" | |
| 56 | |
| 57 #ifdef HAVE_PNG | |
| 1743 | 58 |
| 59 BEGIN_C_DECLS | |
| 60 | |
| 647 | 61 #define message message_ /* Yuck */ |
| 428 | 62 #include <png.h> |
| 647 | 63 #undef message |
| 1743 | 64 |
| 65 END_C_DECLS | |
| 66 | |
| 428 | 67 #else |
| 68 #include <setjmp.h> | |
| 69 #endif | |
| 70 #include "file-coding.h" | |
| 71 | |
| 72 #ifdef HAVE_TIFF | |
| 73 DEFINE_IMAGE_INSTANTIATOR_FORMAT (tiff); | |
| 74 Lisp_Object Qtiff; | |
| 75 #endif | |
| 76 | |
| 77 #ifdef HAVE_JPEG | |
| 78 DEFINE_IMAGE_INSTANTIATOR_FORMAT (jpeg); | |
| 79 Lisp_Object Qjpeg; | |
| 80 #endif | |
| 81 | |
| 82 #ifdef HAVE_GIF | |
| 83 DEFINE_IMAGE_INSTANTIATOR_FORMAT (gif); | |
| 84 Lisp_Object Qgif; | |
| 85 #endif | |
| 86 | |
| 87 #ifdef HAVE_PNG | |
| 88 DEFINE_IMAGE_INSTANTIATOR_FORMAT (png); | |
| 89 Lisp_Object Qpng; | |
| 90 #endif | |
| 91 | |
| 92 | |
| 93 #ifdef HAVE_JPEG | |
| 94 | |
| 95 /********************************************************************** | |
| 96 * JPEG * | |
| 97 **********************************************************************/ | |
| 98 | |
| 1743 | 99 BEGIN_C_DECLS |
| 100 | |
| 4854 | 101 #ifdef WIN32_ANY |
| 102 /* #### Yuck! More horrifitude. tiffio.h, below, and sysfile.h above, | |
| 103 include <windows.h>, which defines INT32 and INT16, the former | |
| 104 differently and incompatibly from jmorecfg.h, included by jpeglib.h. We | |
| 105 can disable the stuff in jmorecfg.h by defining XMD_H (clever, huh?); | |
| 106 then we define these typedefs the way that <windows.h> wants them (which | |
| 107 is more correct, anyway; jmorecfg.h defines INT32 as `long'). */ | |
| 2500 | 108 #define XMD_H |
| 109 typedef signed int INT32; | |
| 110 typedef signed short INT16; | |
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111 |
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112 /* And another one... jmorecfg.h defines the 'boolean' type as int, |
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113 which conflicts with the standard Windows 'boolean' definition as |
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114 unsigned char. Ref: http://www.asmail.be/msg0054688232.html */ |
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115 #ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */ |
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116 typedef unsigned char boolean; |
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117 #endif |
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118 #define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */ |
| 2500 | 119 #endif |
| 120 | |
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121 /* Yet more breakage... jmorecfg.h unconditionally defines FAR either as |
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122 "far" or as blank. Windef.h unconditionally defines FAR as "far". |
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123 We'll avoid the compile warning by redefing FAR the way windows defines it, |
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124 after loading the JPEG headers. */ |
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125 #undef FAR |
| 428 | 126 #include <jpeglib.h> |
| 127 #include <jerror.h> | |
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128 #undef FAR |
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129 #define FAR far |
| 1743 | 130 |
| 131 END_C_DECLS | |
| 428 | 132 |
| 133 /*#define USE_TEMP_FILES_FOR_JPEG_IMAGES 1*/ | |
| 134 static void | |
| 135 jpeg_validate (Lisp_Object instantiator) | |
| 136 { | |
| 137 file_or_data_must_be_present (instantiator); | |
| 138 } | |
| 139 | |
| 140 static Lisp_Object | |
| 442 | 141 jpeg_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 142 Lisp_Object UNUSED (dest_mask)) |
| 428 | 143 { |
| 144 return simple_image_type_normalize (inst, console_type, Qjpeg); | |
| 145 } | |
| 146 | |
| 147 static int | |
| 148 jpeg_possible_dest_types (void) | |
| 149 { | |
| 150 return IMAGE_COLOR_PIXMAP_MASK; | |
| 151 } | |
| 152 | |
| 153 /* To survive the otherwise baffling complexity of making sure | |
| 154 everything gets cleaned up in the presence of an error, we | |
| 155 use an unwind_protect(). */ | |
| 156 | |
| 157 struct jpeg_unwind_data | |
| 158 { | |
| 159 /* Stream that we need to close */ | |
| 160 FILE *instream; | |
| 161 /* Object that holds state info for JPEG decoding */ | |
| 162 struct jpeg_decompress_struct *cinfo_ptr; | |
| 163 /* EImage data */ | |
| 2367 | 164 Binbyte *eimage; |
| 428 | 165 }; |
| 166 | |
| 167 static Lisp_Object | |
| 168 jpeg_instantiate_unwind (Lisp_Object unwind_obj) | |
| 169 { | |
| 170 struct jpeg_unwind_data *data = | |
| 171 (struct jpeg_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 172 | |
| 173 free_opaque_ptr (unwind_obj); | |
| 174 if (data->cinfo_ptr) | |
| 175 jpeg_destroy_decompress (data->cinfo_ptr); | |
| 176 | |
| 177 if (data->instream) | |
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178 { |
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179 retry_fclose (data->instream); |
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180 data->instream = 0; |
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181 } |
| 428 | 182 |
| 1726 | 183 if (data->eimage) |
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184 { |
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185 xfree (data->eimage); |
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186 data->eimage = 0; |
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187 } |
| 428 | 188 |
| 189 return Qnil; | |
| 190 } | |
| 191 | |
| 192 /* | |
| 193 * ERROR HANDLING: | |
| 194 * | |
| 195 * The JPEG library's standard error handler (jerror.c) is divided into | |
| 196 * several "methods" which you can override individually. This lets you | |
| 197 * adjust the behavior without duplicating a lot of code, which you might | |
| 198 * have to update with each future release. | |
| 199 * | |
| 200 * Our example here shows how to override the "error_exit" method so that | |
| 201 * control is returned to the library's caller when a fatal error occurs, | |
| 202 * rather than calling exit() as the standard error_exit method does. | |
| 203 * | |
| 204 * We use C's setjmp/longjmp facility to return control. This means that the | |
| 205 * routine which calls the JPEG library must first execute a setjmp() call to | |
| 206 * establish the return point. We want the replacement error_exit to do a | |
| 207 * longjmp(). But we need to make the setjmp buffer accessible to the | |
| 208 * error_exit routine. To do this, we make a private extension of the | |
| 209 * standard JPEG error handler object. (If we were using C++, we'd say we | |
| 210 * were making a subclass of the regular error handler.) | |
| 211 * | |
| 212 * Here's the extended error handler struct: | |
| 213 */ | |
| 214 | |
| 215 struct my_jpeg_error_mgr | |
| 216 { | |
| 217 struct jpeg_error_mgr pub; /* "public" fields */ | |
| 218 jmp_buf setjmp_buffer; /* for return to caller */ | |
| 219 }; | |
| 220 | |
| 221 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 222 METHODDEF(void) | |
| 223 #else | |
| 224 METHODDEF void | |
| 225 #endif | |
| 2286 | 226 our_init_source (j_decompress_ptr UNUSED (cinfo)) |
| 428 | 227 { |
| 228 } | |
| 229 | |
| 230 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 231 METHODDEF(boolean) | |
| 232 #else | |
| 233 METHODDEF boolean | |
| 234 #endif | |
| 235 our_fill_input_buffer (j_decompress_ptr cinfo) | |
| 236 { | |
| 237 /* Insert a fake EOI marker */ | |
| 238 struct jpeg_source_mgr *src = cinfo->src; | |
| 239 static JOCTET buffer[2]; | |
| 240 | |
| 241 buffer[0] = (JOCTET) 0xFF; | |
| 242 buffer[1] = (JOCTET) JPEG_EOI; | |
| 243 | |
| 244 src->next_input_byte = buffer; | |
| 245 src->bytes_in_buffer = 2; | |
| 246 return TRUE; | |
| 247 } | |
| 248 | |
| 249 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 250 METHODDEF(void) | |
| 251 #else | |
| 252 METHODDEF void | |
| 253 #endif | |
| 254 our_skip_input_data (j_decompress_ptr cinfo, long num_bytes) | |
| 255 { | |
| 256 struct jpeg_source_mgr *src = NULL; | |
| 257 | |
| 258 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 259 | |
| 260 if (!src) | |
| 647 | 261 return; |
| 262 else if (num_bytes > (long) src->bytes_in_buffer) | |
| 428 | 263 { |
| 647 | 264 ERREXIT (cinfo, JERR_INPUT_EOF); |
| 265 /*NOTREACHED*/ | |
| 266 } | |
| 428 | 267 |
| 268 src->bytes_in_buffer -= num_bytes; | |
| 269 src->next_input_byte += num_bytes; | |
| 270 } | |
| 271 | |
| 272 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 273 METHODDEF(void) | |
| 274 #else | |
| 275 METHODDEF void | |
| 276 #endif | |
| 2286 | 277 our_term_source (j_decompress_ptr UNUSED (cinfo)) |
| 428 | 278 { |
| 279 } | |
| 280 | |
| 281 typedef struct | |
| 282 { | |
| 283 struct jpeg_source_mgr pub; | |
| 284 } our_jpeg_source_mgr; | |
| 285 | |
| 286 static void | |
| 665 | 287 jpeg_memory_src (j_decompress_ptr cinfo, JOCTET *data, Bytecount len) |
| 428 | 288 { |
| 289 struct jpeg_source_mgr *src; | |
| 290 | |
| 291 if (cinfo->src == NULL) | |
| 292 { /* first time for this JPEG object? */ | |
| 293 cinfo->src = (struct jpeg_source_mgr *) | |
| 294 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, | |
| 295 sizeof(our_jpeg_source_mgr)); | |
| 296 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 297 src->next_input_byte = data; | |
| 298 } | |
| 299 src = (struct jpeg_source_mgr *) cinfo->src; | |
| 300 src->init_source = our_init_source; | |
| 301 src->fill_input_buffer = our_fill_input_buffer; | |
| 302 src->skip_input_data = our_skip_input_data; | |
| 303 src->resync_to_restart = jpeg_resync_to_restart; /* use default method */ | |
| 304 src->term_source = our_term_source; | |
| 305 src->bytes_in_buffer = len; | |
| 306 src->next_input_byte = data; | |
| 307 } | |
| 308 | |
| 309 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 310 METHODDEF(void) | |
| 311 #else | |
| 312 METHODDEF void | |
| 313 #endif | |
| 314 my_jpeg_error_exit (j_common_ptr cinfo) | |
| 315 { | |
| 316 /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */ | |
| 317 struct my_jpeg_error_mgr *myerr = (struct my_jpeg_error_mgr *) cinfo->err; | |
| 318 | |
| 319 /* Return control to the setjmp point */ | |
| 320 longjmp (myerr->setjmp_buffer, 1); | |
| 321 } | |
| 322 | |
| 323 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61) | |
| 324 METHODDEF(void) | |
| 325 #else | |
| 326 METHODDEF void | |
| 327 #endif | |
| 328 my_jpeg_output_message (j_common_ptr cinfo) | |
| 329 { | |
| 771 | 330 Extbyte buffer[JMSG_LENGTH_MAX]; |
| 867 | 331 Ibyte *intbuf; |
| 428 | 332 |
| 333 /* Create the message */ | |
| 334 (*cinfo->err->format_message) (cinfo, buffer); | |
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335 intbuf = EXTERNAL_TO_ITEXT (buffer, Qjpeg_error_message_encoding); |
| 771 | 336 warn_when_safe (Qjpeg, Qinfo, "%s", intbuf); |
| 428 | 337 } |
| 338 | |
| 339 /* The code in this routine is based on example.c from the JPEG library | |
| 340 source code and from gif_instantiate() */ | |
| 341 static void | |
| 342 jpeg_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 343 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 344 int dest_mask, Lisp_Object domain) |
| 345 { | |
| 440 | 346 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 347 /* It is OK for the unwind data to be local to this function, |
| 348 because the unwind-protect is always executed when this | |
| 349 stack frame is still valid. */ | |
| 350 struct jpeg_unwind_data unwind; | |
| 351 int speccount = specpdl_depth (); | |
| 352 | |
| 353 /* This struct contains the JPEG decompression parameters and pointers to | |
| 354 * working space (which is allocated as needed by the JPEG library). | |
| 355 */ | |
| 356 struct jpeg_decompress_struct cinfo; | |
| 357 /* We use our private extension JPEG error handler. | |
| 358 * Note that this struct must live as long as the main JPEG parameter | |
| 359 * struct, to avoid dangling-pointer problems. | |
| 360 */ | |
| 361 struct my_jpeg_error_mgr jerr; | |
| 362 | |
| 363 /* Step -1: First record our unwind-protect, which will clean up after | |
| 364 any exit, normal or not */ | |
| 365 | |
| 366 xzero (unwind); | |
| 367 record_unwind_protect (jpeg_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 368 | |
| 369 /* Step 1: allocate and initialize JPEG decompression object */ | |
| 370 | |
| 371 /* We set up the normal JPEG error routines, then override error_exit. */ | |
| 372 cinfo.err = jpeg_std_error (&jerr.pub); | |
| 373 jerr.pub.error_exit = my_jpeg_error_exit; | |
| 374 jerr.pub.output_message = my_jpeg_output_message; | |
| 375 | |
| 376 /* Establish the setjmp return context for my_error_exit to use. */ | |
| 377 if (setjmp (jerr.setjmp_buffer)) | |
| 378 { | |
| 379 /* If we get here, the JPEG code has signaled an error. | |
| 380 * We need to clean up the JPEG object, close the input file, and return. | |
| 381 */ | |
| 382 | |
| 383 { | |
| 384 Lisp_Object errstring; | |
| 771 | 385 Extbyte buffer[JMSG_LENGTH_MAX]; |
| 428 | 386 |
| 387 /* Create the message */ | |
| 388 (*cinfo.err->format_message) ((j_common_ptr) &cinfo, buffer); | |
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389 errstring = build_extstring (buffer, Qjpeg_error_message_encoding); |
| 428 | 390 |
| 391 signal_image_error_2 ("JPEG decoding error", | |
| 392 errstring, instantiator); | |
| 393 } | |
| 394 } | |
| 395 | |
| 396 /* Now we can initialize the JPEG decompression object. */ | |
| 397 jpeg_create_decompress (&cinfo); | |
| 398 unwind.cinfo_ptr = &cinfo; | |
| 399 | |
| 400 /* Step 2: specify data source (eg, a file) */ | |
| 401 | |
| 402 { | |
| 403 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 404 const Binbyte *bytes; |
| 665 | 405 Bytecount len; |
| 428 | 406 |
| 407 /* #### This is a definite problem under Mule due to the amount of | |
| 408 stack data it might allocate. Need to be able to convert and | |
| 409 write out to a file. */ | |
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410 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 411 jpeg_memory_src (&cinfo, (JOCTET *) bytes, len); |
| 412 } | |
| 413 | |
| 414 /* Step 3: read file parameters with jpeg_read_header() */ | |
| 415 | |
| 416 jpeg_read_header (&cinfo, TRUE); | |
| 417 /* We can ignore the return value from jpeg_read_header since | |
| 418 * (a) suspension is not possible with the stdio data source, and | |
| 419 * (b) we passed TRUE to reject a tables-only JPEG file as an error. | |
| 420 * See libjpeg.doc for more info. | |
| 421 */ | |
| 422 | |
| 423 { | |
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424 UINT_64_BIT pixels_sq; |
| 428 | 425 int jpeg_gray = 0; /* if we're dealing with a grayscale */ |
| 426 /* Step 4: set parameters for decompression. */ | |
| 427 | |
| 428 /* Now that we're using EImages, send all data as 24bit color. | |
| 429 The backend routine will take care of any necessary reductions. | |
| 430 We do have to handle the grayscale case ourselves, however. */ | |
| 431 if (cinfo.jpeg_color_space == JCS_GRAYSCALE) | |
| 432 { | |
| 433 cinfo.out_color_space = JCS_GRAYSCALE; | |
| 434 jpeg_gray = 1; | |
| 435 } | |
| 436 else | |
| 437 { | |
| 438 /* we're relying on the jpeg driver to do any other conversions, | |
| 439 or signal an error if the conversion isn't supported. */ | |
| 440 cinfo.out_color_space = JCS_RGB; | |
| 441 } | |
| 442 | |
| 443 /* Step 5: Start decompressor */ | |
| 444 jpeg_start_decompress (&cinfo); | |
| 445 | |
| 446 /* Step 6: Read in the data and put into EImage format (8bit RGB triples)*/ | |
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447 pixels_sq = |
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448 (UINT_64_BIT) cinfo.output_width * (UINT_64_BIT) cinfo.output_height; |
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449 if (pixels_sq > ((size_t) -1) / 3) |
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450 signal_image_error ("JPEG image too large to instantiate", instantiator); |
| 2367 | 451 unwind.eimage = |
| 452 xnew_binbytes (cinfo.output_width * cinfo.output_height * 3); | |
| 428 | 453 if (!unwind.eimage) |
| 454 signal_image_error("Unable to allocate enough memory for image", instantiator); | |
| 455 | |
| 456 { | |
| 457 JSAMPARRAY row_buffer; /* Output row buffer */ | |
| 458 JSAMPLE *jp; | |
| 459 int row_stride; /* physical row width in output buffer */ | |
| 2367 | 460 Binbyte *op = unwind.eimage; |
| 428 | 461 |
| 462 /* We may need to do some setup of our own at this point before reading | |
| 463 * the data. After jpeg_start_decompress() we have the correct scaled | |
| 464 * output image dimensions available | |
| 465 * We need to make an output work buffer of the right size. | |
| 466 */ | |
| 467 /* JSAMPLEs per row in output buffer. */ | |
| 468 row_stride = cinfo.output_width * cinfo.output_components; | |
| 469 /* Make a one-row-high sample array that will go away when done | |
| 470 with image */ | |
| 471 row_buffer = ((*cinfo.mem->alloc_sarray) | |
| 472 ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1)); | |
| 473 | |
| 474 /* Here we use the library's state variable cinfo.output_scanline as the | |
| 475 * loop counter, so that we don't have to keep track ourselves. | |
| 476 */ | |
| 477 while (cinfo.output_scanline < cinfo.output_height) | |
| 478 { | |
| 479 int i; | |
| 480 | |
| 481 /* jpeg_read_scanlines expects an array of pointers to scanlines. | |
| 482 * Here the array is only one element long, but you could ask for | |
| 483 * more than one scanline at a time if that's more convenient. | |
| 484 */ | |
| 485 (void) jpeg_read_scanlines (&cinfo, row_buffer, 1); | |
| 486 jp = row_buffer[0]; | |
| 647 | 487 for (i = 0; i < (int) cinfo.output_width; i++) |
| 428 | 488 { |
| 489 int clr; | |
| 490 if (jpeg_gray) | |
| 491 { | |
| 2367 | 492 Binbyte val; |
| 428 | 493 #if (BITS_IN_JSAMPLE == 8) |
| 2367 | 494 val = (Binbyte) *jp++; |
| 428 | 495 #else /* other option is 12 */ |
| 2367 | 496 val = (Binbyte) (*jp++ >> 4); |
| 428 | 497 #endif |
| 498 for (clr = 0; clr < 3; clr++) /* copy the same value into RGB */ | |
| 499 *op++ = val; | |
| 500 } | |
| 501 else | |
| 502 { | |
| 503 for (clr = 0; clr < 3; clr++) | |
| 504 #if (BITS_IN_JSAMPLE == 8) | |
| 2367 | 505 *op++ = (Binbyte)*jp++; |
| 428 | 506 #else /* other option is 12 */ |
| 2367 | 507 *op++ = (Binbyte)(*jp++ >> 4); |
| 428 | 508 #endif |
| 509 } | |
| 510 } | |
| 511 } | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 /* Step 6.5: Create the pixmap and set up the image instance */ | |
| 516 /* now instantiate */ | |
| 442 | 517 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 518 init_image_instance_from_eimage, |
| 519 (ii, cinfo.output_width, cinfo.output_height, 1, | |
| 520 unwind.eimage, dest_mask, | |
| 2959 | 521 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 522 |
| 523 /* Step 7: Finish decompression */ | |
| 524 | |
| 525 jpeg_finish_decompress (&cinfo); | |
| 526 /* We can ignore the return value since suspension is not possible | |
| 527 * with the stdio data source. | |
| 528 */ | |
| 529 | |
| 530 /* And we're done! */ | |
| 531 /* This will clean up everything else. */ | |
| 771 | 532 unbind_to (speccount); |
| 428 | 533 } |
| 534 | |
| 535 #endif /* HAVE_JPEG */ | |
| 536 | |
| 537 #ifdef HAVE_GIF | |
| 538 /********************************************************************** | |
| 539 * GIF * | |
| 540 **********************************************************************/ | |
| 541 | |
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542 #include <gif_lib.h> |
| 428 | 543 |
| 544 static void | |
| 545 gif_validate (Lisp_Object instantiator) | |
| 546 { | |
| 547 file_or_data_must_be_present (instantiator); | |
| 548 } | |
| 549 | |
| 550 static Lisp_Object | |
| 442 | 551 gif_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 552 Lisp_Object UNUSED (dest_mask)) |
| 428 | 553 { |
| 554 return simple_image_type_normalize (inst, console_type, Qgif); | |
| 555 } | |
| 556 | |
| 557 static int | |
| 558 gif_possible_dest_types (void) | |
| 559 { | |
| 560 return IMAGE_COLOR_PIXMAP_MASK; | |
| 561 } | |
| 562 | |
| 563 /* To survive the otherwise baffling complexity of making sure | |
| 564 everything gets cleaned up in the presence of an error, we | |
| 565 use an unwind_protect(). */ | |
| 566 | |
| 567 struct gif_unwind_data | |
| 568 { | |
| 2367 | 569 Binbyte *eimage; |
| 428 | 570 /* Object that holds the decoded data from a GIF file */ |
| 571 GifFileType *giffile; | |
| 572 }; | |
| 573 | |
| 574 static Lisp_Object | |
| 575 gif_instantiate_unwind (Lisp_Object unwind_obj) | |
| 576 { | |
| 577 struct gif_unwind_data *data = | |
| 578 (struct gif_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 579 | |
| 580 free_opaque_ptr (unwind_obj); | |
| 581 if (data->giffile) | |
| 582 { | |
| 583 DGifCloseFile (data->giffile); | |
|
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584 FreeSavedImages (data->giffile); |
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585 data->giffile = 0; |
| 428 | 586 } |
| 647 | 587 if (data->eimage) |
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588 { |
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589 xfree (data->eimage); |
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590 data->eimage = 0; |
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591 } |
| 428 | 592 |
| 593 return Qnil; | |
| 594 } | |
| 595 | |
| 596 typedef struct gif_memory_storage | |
| 597 { | |
| 2367 | 598 Binbyte *bytes; /* The data */ |
| 665 | 599 Bytecount len; /* How big is it? */ |
| 600 Bytecount index; /* Where are we? */ | |
| 428 | 601 } gif_memory_storage; |
| 602 | |
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603 static int |
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604 gif_read_from_memory (GifFileType *gif, GifByteType *buf, int size) |
| 428 | 605 { |
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606 gif_memory_storage *mem = (gif_memory_storage *) gif->UserData; |
| 428 | 607 |
| 608 if (size > (mem->len - mem->index)) | |
| 647 | 609 return -1; |
| 610 memcpy (buf, mem->bytes + mem->index, size); | |
| 428 | 611 mem->index = mem->index + size; |
| 612 return size; | |
| 613 } | |
| 614 | |
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615 static const char * |
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616 gif_decode_error_string (void) |
| 428 | 617 { |
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618 switch (GifLastError ()) |
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619 { |
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620 case D_GIF_ERR_OPEN_FAILED: |
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621 return "GIF error: unable to open"; |
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622 case D_GIF_ERR_READ_FAILED: |
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623 return "GIF error: read failed"; |
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624 case D_GIF_ERR_NOT_GIF_FILE: |
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625 return "GIF error: not a GIF file"; |
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626 case D_GIF_ERR_NO_SCRN_DSCR: |
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627 return "GIF error: no Screen Descriptor detected"; |
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628 case D_GIF_ERR_NO_IMAG_DSCR: |
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629 return "GIF error: no Image Descriptor detected"; |
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630 case D_GIF_ERR_NO_COLOR_MAP: |
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631 return "GIF error: no global or local color map"; |
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632 case D_GIF_ERR_WRONG_RECORD: |
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633 return "GIF error: wrong record type"; |
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634 case D_GIF_ERR_DATA_TOO_BIG: |
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635 return "GIF error: image is larger than indicated by header"; |
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636 case D_GIF_ERR_NOT_ENOUGH_MEM: |
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637 return "GIF error: out of memory"; |
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638 case D_GIF_ERR_CLOSE_FAILED: |
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639 return "GIF error: failed to close file"; |
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640 case D_GIF_ERR_NOT_READABLE: |
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641 return "GIF error: file is not readable"; |
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642 case D_GIF_ERR_IMAGE_DEFECT: |
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643 return "GIF error: image is defective"; |
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644 case D_GIF_ERR_EOF_TOO_SOON: |
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645 return "GIF error: image EOF detected before image complete"; |
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646 default: |
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647 return "GIF error: unknown error"; |
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648 } |
| 428 | 649 } |
| 650 | |
| 651 static void | |
| 652 gif_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 653 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 654 int dest_mask, Lisp_Object domain) |
| 655 { | |
| 440 | 656 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 657 /* It is OK for the unwind data to be local to this function, |
| 658 because the unwind-protect is always executed when this | |
| 659 stack frame is still valid. */ | |
| 660 struct gif_unwind_data unwind; | |
| 661 int speccount = specpdl_depth (); | |
| 662 gif_memory_storage mem_struct; | |
| 2367 | 663 Binbyte *bytes; |
| 665 | 664 Bytecount len; |
| 428 | 665 int height = 0; |
| 666 int width = 0; | |
| 667 | |
| 668 xzero (unwind); | |
| 669 record_unwind_protect (gif_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 670 | |
| 671 /* 1. Now decode the data. */ | |
| 672 | |
| 673 { | |
| 674 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 675 | |
| 676 assert (!NILP (data)); | |
| 677 | |
|
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678 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 679 mem_struct.bytes = bytes; |
| 680 mem_struct.len = len; | |
| 681 mem_struct.index = 0; | |
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682 unwind.giffile = DGifOpen (&mem_struct, gif_read_from_memory); |
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683 if (unwind.giffile == NULL) |
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684 signal_image_error (gif_decode_error_string (), instantiator); |
| 428 | 685 |
| 686 /* Then slurp the image into memory, decoding along the way. | |
| 687 The result is the image in a simple one-byte-per-pixel | |
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688 format. */ |
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689 if (DGifSlurp (unwind.giffile) == GIF_ERROR) |
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690 signal_image_error (gif_decode_error_string (), instantiator); |
| 428 | 691 } |
| 692 | |
| 693 /* 3. Now create the EImage(s) */ | |
| 694 { | |
|
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Vin Shelton <acs@xemacs.org>
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|
695 ColorMapObject *cmo = (unwind.giffile->Image.ColorMap ? unwind.giffile->Image.ColorMap : unwind.giffile->SColorMap); |
| 428 | 696 int i, j, row, pass, interlace, slice; |
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697 UINT_64_BIT pixels_sq; |
| 2367 | 698 Binbyte *eip; |
| 428 | 699 /* interlaced gifs have rows in this order: |
| 700 0, 8, 16, ..., 4, 12, 20, ..., 2, 6, 10, ..., 1, 3, 5, ... */ | |
| 701 static int InterlacedOffset[] = { 0, 4, 2, 1 }; | |
| 702 static int InterlacedJumps[] = { 8, 8, 4, 2 }; | |
| 703 | |
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704 if (cmo == NULL) |
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705 signal_image_error ("GIF image has no color map", instantiator); |
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706 |
| 428 | 707 height = unwind.giffile->SHeight; |
| 708 width = unwind.giffile->SWidth; | |
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709 pixels_sq = (UINT_64_BIT) width * (UINT_64_BIT) height; |
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710 if (pixels_sq > ((size_t) -1) / (3 * unwind.giffile->ImageCount)) |
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711 signal_image_error ("GIF image too large to instantiate", instantiator); |
| 2367 | 712 unwind.eimage = |
| 713 xnew_binbytes (width * height * 3 * unwind.giffile->ImageCount); | |
| 428 | 714 if (!unwind.eimage) |
| 715 signal_image_error("Unable to allocate enough memory for image", instantiator); | |
| 716 | |
| 717 /* write the data in EImage format (8bit RGB triples) */ | |
| 718 | |
| 719 for (slice = 0; slice < unwind.giffile->ImageCount; slice++) | |
| 720 { | |
| 638 | 721 /* We check here that the current image covers the full "screen" size. */ |
| 428 | 722 if (unwind.giffile->SavedImages[slice].ImageDesc.Height != height |
| 723 || unwind.giffile->SavedImages[slice].ImageDesc.Width != width | |
| 724 || unwind.giffile->SavedImages[slice].ImageDesc.Left != 0 | |
| 725 || unwind.giffile->SavedImages[slice].ImageDesc.Top != 0) | |
| 726 signal_image_error ("Image in GIF file is not full size", | |
| 727 instantiator); | |
| 728 | |
| 729 interlace = unwind.giffile->SavedImages[slice].ImageDesc.Interlace; | |
| 730 pass = 0; | |
| 731 row = interlace ? InterlacedOffset[pass] : 0; | |
| 732 eip = unwind.eimage + (width * height * 3 * slice); | |
| 733 for (i = 0; i < height; i++) | |
| 734 { | |
| 735 if (interlace) | |
| 736 if (row >= height) { | |
| 737 row = InterlacedOffset[++pass]; | |
| 738 while (row >= height) | |
| 739 row = InterlacedOffset[++pass]; | |
| 740 } | |
| 741 eip = unwind.eimage + (width * height * 3 * slice) + (row * width * 3); | |
| 742 for (j = 0; j < width; j++) | |
| 743 { | |
| 2367 | 744 Binbyte pixel = |
| 428 | 745 unwind.giffile->SavedImages[slice].RasterBits[(i * width) + j]; |
| 746 *eip++ = cmo->Colors[pixel].Red; | |
| 747 *eip++ = cmo->Colors[pixel].Green; | |
| 748 *eip++ = cmo->Colors[pixel].Blue; | |
| 749 } | |
| 750 row += interlace ? InterlacedJumps[pass] : 1; | |
| 751 } | |
| 752 } | |
| 753 | |
| 754 /* now instantiate */ | |
| 442 | 755 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 756 init_image_instance_from_eimage, |
| 2959 | 757 (ii, width, height, unwind.giffile->ImageCount, |
| 758 unwind.eimage, dest_mask, instantiator, pointer_fg, | |
| 759 pointer_bg, domain)); | |
| 428 | 760 } |
| 761 | |
| 762 /* We read the gif successfully. If we have more than one slice then | |
| 763 animate the gif. */ | |
| 764 if (unwind.giffile->ImageCount > 1) | |
| 765 { | |
| 766 /* See if there is a timeout value. In theory there could be one | |
|
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767 for every image - but that makes the implementation way too |
| 428 | 768 complicated for now so we just take the first. */ |
| 769 unsigned short timeout = 0; | |
| 770 Lisp_Object tid; | |
| 771 | |
| 772 if (unwind.giffile->SavedImages[0].Function == GRAPHICS_EXT_FUNC_CODE | |
| 773 && | |
| 774 unwind.giffile->SavedImages[0].ExtensionBlockCount) | |
| 775 { | |
| 776 timeout = (unsigned short) | |
| 438 | 777 ((unwind.giffile->SavedImages[0].ExtensionBlocks[0].Bytes[2] << 8) + |
| 428 | 778 unwind.giffile-> SavedImages[0].ExtensionBlocks[0].Bytes[1]) * 10; |
| 779 } | |
| 780 | |
| 781 /* Too short a timeout will crucify us performance-wise. */ | |
| 782 tid = add_glyph_animated_timeout (timeout > 10 ? timeout : 10, image_instance); | |
| 783 | |
| 784 if (!NILP (tid)) | |
| 785 IMAGE_INSTANCE_PIXMAP_TIMEOUT (ii) = XINT (tid); | |
| 786 } | |
| 438 | 787 |
| 771 | 788 unbind_to (speccount); |
| 428 | 789 } |
| 790 | |
| 791 #endif /* HAVE_GIF */ | |
| 792 | |
| 793 | |
| 794 #ifdef HAVE_PNG | |
| 795 | |
| 796 /********************************************************************** | |
| 797 * PNG * | |
| 798 **********************************************************************/ | |
| 799 static void | |
| 800 png_validate (Lisp_Object instantiator) | |
| 801 { | |
| 802 file_or_data_must_be_present (instantiator); | |
| 803 } | |
| 804 | |
| 805 static Lisp_Object | |
| 442 | 806 png_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 807 Lisp_Object UNUSED (dest_mask)) |
| 428 | 808 { |
| 809 return simple_image_type_normalize (inst, console_type, Qpng); | |
| 810 } | |
| 811 | |
| 812 static int | |
| 813 png_possible_dest_types (void) | |
| 814 { | |
| 815 return IMAGE_COLOR_PIXMAP_MASK; | |
| 816 } | |
| 817 | |
| 818 struct png_memory_storage | |
| 819 { | |
| 2367 | 820 const Binbyte *bytes; /* The data */ |
| 665 | 821 Bytecount len; /* How big is it? */ |
| 822 Bytecount index; /* Where are we? */ | |
| 428 | 823 }; |
| 824 | |
| 825 static void | |
| 647 | 826 png_read_from_memory (png_structp png_ptr, png_bytep data, |
| 827 png_size_t length) | |
| 428 | 828 { |
| 829 struct png_memory_storage *tbr = | |
| 830 (struct png_memory_storage *) png_get_io_ptr (png_ptr); | |
| 831 | |
| 665 | 832 if ((Bytecount) length > (tbr->len - tbr->index)) |
| 428 | 833 png_error (png_ptr, (png_const_charp) "Read Error"); |
| 647 | 834 memcpy (data, tbr->bytes + tbr->index,length); |
| 428 | 835 tbr->index = tbr->index + length; |
| 836 } | |
| 837 | |
| 838 struct png_error_struct | |
| 839 { | |
| 442 | 840 const char *err_str; |
| 428 | 841 jmp_buf setjmp_buffer; /* for return to caller */ |
| 842 }; | |
| 843 | |
| 844 /* jh 98/03/12 - #### AARRRGH! libpng includes jmp_buf inside its own | |
| 845 structure, and there are cases where the size can be different from | |
| 846 between inside the library, and inside the code! To do an end run | |
| 847 around this, use our own error functions, and don't rely on things | |
| 848 passed in the png_ptr to them. This is an ugly hack and must | |
| 849 go away when the lisp engine is threaded! */ | |
| 850 static struct png_error_struct png_err_stct; | |
| 851 | |
| 852 static void | |
| 2286 | 853 png_error_func (png_structp UNUSED (png_ptr), png_const_charp msg) |
| 428 | 854 { |
| 855 png_err_stct.err_str = msg; | |
| 856 longjmp (png_err_stct.setjmp_buffer, 1); | |
| 857 } | |
| 858 | |
| 859 static void | |
| 2286 | 860 png_warning_func (png_structp UNUSED (png_ptr), png_const_charp msg) |
| 428 | 861 { |
| 3734 | 862 DECLARE_EISTRING (eimsg); |
| 863 | |
| 864 eicpy_ext(eimsg, msg, Qbinary); | |
| 865 warn_when_safe (Qpng, Qinfo, "%s", eidata(eimsg)); | |
| 428 | 866 } |
| 867 | |
| 868 struct png_unwind_data | |
| 869 { | |
| 870 FILE *instream; | |
| 2367 | 871 Binbyte *eimage; |
| 428 | 872 png_structp png_ptr; |
| 873 png_infop info_ptr; | |
| 874 }; | |
| 875 | |
| 876 static Lisp_Object | |
| 877 png_instantiate_unwind (Lisp_Object unwind_obj) | |
| 878 { | |
| 879 struct png_unwind_data *data = | |
| 880 (struct png_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 881 | |
| 882 free_opaque_ptr (unwind_obj); | |
| 883 if (data->png_ptr) | |
| 3839 | 884 { |
| 885 /* ensure we can't get here again */ | |
| 886 png_structp tmp = data->png_ptr; | |
| 887 data->png_ptr = NULL; | |
| 888 png_destroy_read_struct (&tmp, &(data->info_ptr), (png_infopp)NULL); | |
| 889 } | |
| 890 | |
| 428 | 891 if (data->instream) |
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892 { |
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893 retry_fclose (data->instream); |
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894 data->instream = 0; |
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895 } |
| 428 | 896 |
| 1726 | 897 if (data->eimage) |
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898 { |
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899 xfree (data->eimage); |
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900 data->eimage = 0; |
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|
901 } |
| 428 | 902 |
| 903 return Qnil; | |
| 904 } | |
| 905 | |
| 906 static void | |
| 907 png_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 908 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 909 int dest_mask, Lisp_Object domain) |
| 910 { | |
| 440 | 911 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 912 struct png_unwind_data unwind; |
| 913 int speccount = specpdl_depth (); | |
| 914 int height, width; | |
| 915 struct png_memory_storage tbr; /* Data to be read */ | |
| 916 | |
| 917 /* PNG variables */ | |
| 918 png_structp png_ptr; | |
| 919 png_infop info_ptr; | |
| 920 | |
| 3839 | 921 xzero (unwind); |
| 922 record_unwind_protect (png_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 923 | |
| 924 if (setjmp (png_err_stct.setjmp_buffer)) | |
| 925 { | |
| 926 /* Something blew up: | |
| 927 just display the error (cleanup happens in the unwind) */ | |
| 928 signal_image_error_2 ("Error decoding PNG", | |
|
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929 build_extstring (png_err_stct.err_str, |
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930 Qerror_message_encoding), |
| 3839 | 931 instantiator); |
| 932 } | |
| 933 | |
| 428 | 934 /* Initialize all PNG structures */ |
| 3839 | 935 png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, |
| 936 (void *) &png_err_stct, | |
| 428 | 937 png_error_func, png_warning_func); |
| 938 if (!png_ptr) | |
| 939 signal_image_error ("Error obtaining memory for png_read", instantiator); | |
| 3839 | 940 unwind.png_ptr = png_ptr; |
| 941 | |
| 428 | 942 info_ptr = png_create_info_struct (png_ptr); |
| 943 if (!info_ptr) | |
| 944 { | |
| 3839 | 945 unwind.png_ptr = NULL; /* avoid re-calling png_destroy_read_struct |
| 946 when unwinding */ | |
| 428 | 947 png_destroy_read_struct (&png_ptr, (png_infopp)NULL, (png_infopp)NULL); |
| 948 signal_image_error ("Error obtaining memory for png_read", instantiator); | |
| 949 } | |
| 950 unwind.info_ptr = info_ptr; | |
| 951 | |
| 952 /* This code is a mixture of stuff from Ben's GIF/JPEG stuff from | |
| 953 this file, example.c from the libpng 0.81 distribution, and the | |
| 954 pngtopnm sources. -WMP- | |
| 955 */ | |
| 956 /* It has been further modified to handle the API changes for 0.96, | |
| 957 and is no longer usable for previous versions. jh | |
| 958 */ | |
| 959 | |
| 960 /* Initialize the IO layer and read in header information */ | |
| 961 { | |
| 962 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 963 const Binbyte *bytes; |
| 665 | 964 Bytecount len; |
| 428 | 965 |
| 966 assert (!NILP (data)); | |
| 967 | |
| 968 /* #### This is a definite problem under Mule due to the amount of | |
| 969 stack data it might allocate. Need to think about using Lstreams */ | |
|
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970 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 971 tbr.bytes = bytes; |
| 972 tbr.len = len; | |
| 973 tbr.index = 0; | |
| 974 png_set_read_fn (png_ptr,(void *) &tbr, png_read_from_memory); | |
| 975 } | |
| 976 | |
| 977 png_read_info (png_ptr, info_ptr); | |
| 978 | |
| 979 { | |
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980 int y, padding; |
| 2367 | 981 Binbyte **row_pointers; |
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982 UINT_64_BIT pixels_sq; |
|
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983 height = png_get_image_height (png_ptr, info_ptr); |
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984 width = png_get_image_width (png_ptr, info_ptr); |
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985 pixels_sq = (UINT_64_BIT) width * (UINT_64_BIT) height; |
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986 if (pixels_sq > ((size_t) -1) / 3) |
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987 signal_image_error ("PNG image too large to instantiate", instantiator); |
| 428 | 988 |
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989 /* Wow, allocate all the memory. Truly, exciting. |
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990 Well, yes, there's excitement to be had. It turns out that libpng |
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991 strips in place, so the last row overruns the buffer if depth is 16 |
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992 or there's an alpha channel. This is a crash on Linux. So we need |
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993 to add padding. |
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994 The worst case is reducing 8 bytes (16-bit RGBA) to 3 (8-bit RGB). */ |
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995 |
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996 padding = 5 * width; |
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997 unwind.eimage = xnew_array_and_zero (Binbyte, |
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998 (size_t) (pixels_sq * 3 + padding)); |
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999 |
| 428 | 1000 /* libpng expects that the image buffer passed in contains a |
| 1001 picture to draw on top of if the png has any transparencies. | |
| 1002 This could be a good place to pass that in... */ | |
| 1003 | |
| 1004 row_pointers = xnew_array (png_byte *, height); | |
| 1005 for (y = 0; y < height; y++) | |
| 1006 row_pointers[y] = unwind.eimage + (width * 3 * y); | |
| 1007 | |
| 1008 { | |
| 1009 /* if the png specifies a background chunk, go ahead and | |
| 1010 use it, else use what we can get from the default face. */ | |
| 1011 png_color_16 my_background, *image_background; | |
| 1012 Lisp_Object bkgd = Qnil; | |
| 1013 | |
| 1014 my_background.red = 0x7fff; | |
| 1015 my_background.green = 0x7fff; | |
| 1016 my_background.blue = 0x7fff; | |
| 1017 bkgd = FACE_BACKGROUND (Vdefault_face, domain); | |
| 1018 if (!COLOR_INSTANCEP (bkgd)) | |
| 1019 { | |
| 1020 warn_when_safe (Qpng, Qinfo, "Couldn't get background color!"); | |
| 1021 } | |
| 1022 else | |
| 1023 { | |
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1024 Lisp_Color_Instance *c = XCOLOR_INSTANCE (bkgd); |
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1025 Lisp_Object rgb = MAYBE_LISP_DEVMETH (XDEVICE (c->device), |
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1026 color_instance_rgb_components, |
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1027 (c)); |
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1028 #define GETCOLOR(col) my_background.col = (unsigned short) XINT (XCAR (rgb)) |
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|
1029 GETCOLOR(red); rgb = XCDR (rgb); |
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1030 GETCOLOR(green); rgb = XCDR (rgb); |
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1031 GETCOLOR(blue); |
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1032 #undef GETCOLOR |
| 428 | 1033 } |
| 1034 | |
| 1035 if (png_get_bKGD (png_ptr, info_ptr, &image_background)) | |
| 1036 png_set_background (png_ptr, image_background, | |
| 1037 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0); | |
| 1038 else | |
| 1039 png_set_background (png_ptr, &my_background, | |
| 1040 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0); | |
| 1041 } | |
| 1042 | |
| 1043 /* Now that we're using EImage, ask for 8bit RGB triples for any type | |
| 1044 of image*/ | |
|
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1045 switch (png_get_color_type (png_ptr, info_ptr)) |
| 428 | 1046 { |
|
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1047 case PNG_COLOR_TYPE_PALETTE: |
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1048 /* convert palette images to RGB */ |
|
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1049 png_set_palette_to_rgb (png_ptr); |
|
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1050 break; |
|
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1051 |
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1052 case PNG_COLOR_TYPE_GRAY: |
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1053 case PNG_COLOR_TYPE_GRAY_ALPHA: |
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1054 /* convert grayscale images to RGB */ |
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1055 png_set_gray_to_rgb (png_ptr); |
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1056 break; |
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1057 |
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1058 default: |
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1059 /* pad images with depth < 8 bits */ |
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1060 if (png_get_bit_depth (png_ptr, info_ptr) < 8) |
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1061 { |
|
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1062 png_set_packing (png_ptr); |
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1063 } |
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1064 break; |
| 428 | 1065 } |
|
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1066 |
|
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1067 /* strip 16-bit depth files down to 8 bits */ |
|
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1068 if (png_get_bit_depth (png_ptr, info_ptr) == 16) |
|
4698
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1069 png_set_strip_16 (png_ptr); |
|
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1070 /* strip alpha channel |
|
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1071 #### shouldn't we handle this? |
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1072 first call png_read_update_info in case above transformations |
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changeset
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1073 have generated an alpha channel */ |
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1074 png_read_update_info(png_ptr, info_ptr); |
|
5372
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1075 if (png_get_color_type (png_ptr, info_ptr) & PNG_COLOR_MASK_ALPHA) |
|
4698
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changeset
|
1076 png_set_strip_alpha (png_ptr); |
| 428 | 1077 |
| 1078 png_read_image (png_ptr, row_pointers); | |
| 1079 png_read_end (png_ptr, info_ptr); | |
| 1080 | |
|
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1081 /* #### There should be some way to pass this type of data down |
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|
1082 * into the glyph code, where you can get to it from lisp |
|
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|
1083 * anyway. - WMP */ |
| 428 | 1084 { |
|
5372
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1085 int ii, num_text = 0; |
|
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|
1086 png_textp text_ptr = NULL; |
| 3734 | 1087 DECLARE_EISTRING (key); |
| 1088 DECLARE_EISTRING (text); | |
| 428 | 1089 |
|
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1090 if (png_get_text (png_ptr, info_ptr, &text_ptr, &num_text) > 0) |
|
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1091 { |
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1092 for (ii = 0 ; ii < num_text; ii++) |
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1093 { |
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1094 eireset (key); |
|
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|
1095 eireset (text); |
| 428 | 1096 |
|
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1097 eicpy_ext (key, text_ptr[ii].key, Qbinary); |
|
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|
1098 eicpy_ext (text, text_ptr[ii].text, Qbinary); |
|
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|
1099 |
|
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|
1100 warn_when_safe (Qpng, Qinfo, "%s - %s", eidata (key), |
|
6c3a695f54f5
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|
1101 eidata (text)); |
|
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1102 } |
|
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1103 } |
| 428 | 1104 } |
| 1105 | |
|
4976
16112448d484
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Ben Wing <ben@xemacs.org>
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4953
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|
1106 xfree (row_pointers); |
| 428 | 1107 } |
| 1108 | |
| 1109 /* now instantiate */ | |
| 442 | 1110 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 1111 init_image_instance_from_eimage, |
| 1112 (ii, width, height, 1, unwind.eimage, dest_mask, | |
| 2959 | 1113 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 1114 |
| 1115 /* This will clean up everything else. */ | |
| 771 | 1116 unbind_to (speccount); |
| 428 | 1117 } |
| 1118 | |
| 1119 #endif /* HAVE_PNG */ | |
| 1120 | |
| 1121 | |
| 1122 #ifdef HAVE_TIFF | |
| 1123 #include "tiffio.h" | |
| 1124 | |
| 1125 /********************************************************************** | |
| 1126 * TIFF * | |
| 1127 **********************************************************************/ | |
| 1128 static void | |
| 1129 tiff_validate (Lisp_Object instantiator) | |
| 1130 { | |
| 1131 file_or_data_must_be_present (instantiator); | |
| 1132 } | |
| 1133 | |
| 1134 static Lisp_Object | |
| 442 | 1135 tiff_normalize (Lisp_Object inst, Lisp_Object console_type, |
| 2286 | 1136 Lisp_Object UNUSED (dest_mask)) |
| 428 | 1137 { |
| 1138 return simple_image_type_normalize (inst, console_type, Qtiff); | |
| 1139 } | |
| 1140 | |
| 1141 static int | |
| 1142 tiff_possible_dest_types (void) | |
| 1143 { | |
| 1144 return IMAGE_COLOR_PIXMAP_MASK; | |
| 1145 } | |
| 1146 | |
| 1147 struct tiff_unwind_data | |
| 1148 { | |
| 2367 | 1149 Binbyte *eimage; |
| 428 | 1150 /* Object that holds the decoded data from a TIFF file */ |
| 1151 TIFF *tiff; | |
| 1152 }; | |
| 1153 | |
| 1154 static Lisp_Object | |
| 1155 tiff_instantiate_unwind (Lisp_Object unwind_obj) | |
| 1156 { | |
| 1157 struct tiff_unwind_data *data = | |
| 1158 (struct tiff_unwind_data *) get_opaque_ptr (unwind_obj); | |
| 1159 | |
| 1160 free_opaque_ptr (unwind_obj); | |
| 1161 if (data->tiff) | |
| 1162 { | |
|
5169
6c6d78781d59
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changeset
|
1163 TIFFClose (data->tiff); |
|
6c6d78781d59
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changeset
|
1164 data->tiff = 0; |
| 428 | 1165 } |
| 1166 if (data->eimage) | |
|
5169
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changeset
|
1167 { |
|
6c6d78781d59
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changeset
|
1168 xfree (data->eimage); |
|
6c6d78781d59
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|
1169 data->eimage = 0; |
|
6c6d78781d59
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changeset
|
1170 } |
| 428 | 1171 |
| 1172 return Qnil; | |
| 1173 } | |
| 1174 | |
| 1175 typedef struct tiff_memory_storage | |
| 1176 { | |
| 2367 | 1177 Binbyte *bytes; /* The data */ |
| 665 | 1178 Bytecount len; /* How big is it? */ |
| 1179 Bytecount index; /* Where are we? */ | |
| 428 | 1180 } tiff_memory_storage; |
| 1181 | |
| 1182 static size_t | |
| 647 | 1183 tiff_memory_read (thandle_t data, tdata_t buf, tsize_t size) |
| 428 | 1184 { |
| 647 | 1185 tiff_memory_storage *mem = (tiff_memory_storage *) data; |
| 428 | 1186 |
| 665 | 1187 if ((Bytecount) size > (mem->len - mem->index)) |
| 428 | 1188 return (size_t) -1; |
| 647 | 1189 memcpy (buf, mem->bytes + mem->index, size); |
| 428 | 1190 mem->index = mem->index + size; |
| 1191 return size; | |
| 1192 } | |
| 1193 | |
| 647 | 1194 static size_t |
| 2286 | 1195 tiff_memory_write (thandle_t UNUSED (data), tdata_t UNUSED (buf), |
| 1196 tsize_t UNUSED (size)) | |
| 428 | 1197 { |
| 2500 | 1198 ABORT(); |
| 2270 | 1199 return 0; |
| 428 | 1200 } |
| 1201 | |
| 647 | 1202 static toff_t |
| 1203 tiff_memory_seek (thandle_t data, toff_t off, int whence) | |
| 428 | 1204 { |
| 647 | 1205 tiff_memory_storage *mem = (tiff_memory_storage *) data; |
| 428 | 1206 int newidx; |
| 647 | 1207 switch(whence) |
| 1208 { | |
| 1209 case SEEK_SET: | |
| 1210 newidx = off; | |
| 1211 break; | |
| 1212 case SEEK_END: | |
| 1213 newidx = mem->len + off; | |
| 1214 break; | |
| 1215 case SEEK_CUR: | |
| 1216 newidx = mem->index + off; | |
| 1217 break; | |
| 1218 default: | |
| 1219 fprintf (stderr, "Eh? invalid seek mode in tiff_memory_seek\n"); | |
| 1220 return (toff_t) -1; | |
| 1221 } | |
| 428 | 1222 |
| 1223 if ((newidx > mem->len) || (newidx < 0)) | |
| 593 | 1224 return (toff_t) -1; |
| 428 | 1225 |
| 1226 mem->index = newidx; | |
| 1227 return newidx; | |
| 1228 } | |
| 1229 | |
| 1230 static int | |
| 2286 | 1231 tiff_memory_close (thandle_t UNUSED (data)) |
| 428 | 1232 { |
| 1233 return 0; | |
| 1234 } | |
| 1235 | |
| 1236 static int | |
| 2286 | 1237 tiff_map_noop (thandle_t UNUSED (data), tdata_t* UNUSED (pbase), |
| 1238 toff_t* UNUSED (psize)) | |
| 428 | 1239 { |
| 1240 return 0; | |
| 1241 } | |
| 1242 | |
| 1243 static void | |
| 2286 | 1244 tiff_unmap_noop (thandle_t UNUSED (data), tdata_t UNUSED (pbase), |
| 1245 toff_t UNUSED (psize)) | |
| 428 | 1246 { |
| 1247 return; | |
| 1248 } | |
| 1249 | |
| 1250 static toff_t | |
| 647 | 1251 tiff_memory_size (thandle_t data) |
| 428 | 1252 { |
| 1253 tiff_memory_storage *mem = (tiff_memory_storage*)data; | |
| 1254 return mem->len; | |
| 1255 } | |
| 1256 | |
| 1257 struct tiff_error_struct | |
| 1258 { | |
| 438 | 1259 #ifdef HAVE_VSNPRINTF |
| 428 | 1260 char err_str[256]; |
| 1261 #else | |
| 1262 char err_str[1024]; /* return the error string */ | |
| 1263 #endif | |
| 1264 jmp_buf setjmp_buffer; /* for return to caller */ | |
| 1265 }; | |
| 1266 | |
| 1267 /* jh 98/03/12 - ###This struct for passing data to the error functions | |
| 1268 is an ugly hack caused by the fact that libtiff (as of v3.4) doesn't | |
| 1269 have any place to store error func data. This should be rectified | |
| 1270 before XEmacs gets threads! */ | |
| 1271 static struct tiff_error_struct tiff_err_data; | |
| 1272 | |
| 1273 static void | |
| 2286 | 1274 tiff_error_func (const char *UNUSED (module), const char *fmt, ...) |
| 428 | 1275 { |
| 1276 va_list vargs; | |
| 1277 | |
| 1278 va_start (vargs, fmt); | |
| 438 | 1279 #ifdef HAVE_VSNPRINTF |
| 428 | 1280 vsnprintf (tiff_err_data.err_str, 255, fmt, vargs); |
| 1281 #else | |
| 1282 /* pray this doesn't overflow... */ | |
| 1283 vsprintf (tiff_err_data.err_str, fmt, vargs); | |
| 1284 #endif | |
| 1285 va_end (vargs); | |
| 1286 /* return to setjmp point */ | |
| 1287 longjmp (tiff_err_data.setjmp_buffer, 1); | |
| 1288 } | |
| 1289 | |
| 1290 static void | |
| 647 | 1291 tiff_warning_func (const char *module, const char *fmt, ...) |
| 428 | 1292 { |
| 1293 va_list vargs; | |
| 438 | 1294 #ifdef HAVE_VSNPRINTF |
| 428 | 1295 char warn_str[256]; |
| 1296 #else | |
| 1297 char warn_str[1024]; | |
| 1298 #endif | |
| 3734 | 1299 DECLARE_EISTRING (eimodule); |
| 1300 DECLARE_EISTRING (eiwarnstr); | |
| 428 | 1301 |
| 1302 va_start (vargs, fmt); | |
| 438 | 1303 #ifdef HAVE_VSNPRINTF |
| 428 | 1304 vsnprintf (warn_str, 255, fmt, vargs); |
| 1305 #else | |
| 1306 vsprintf (warn_str, fmt, vargs); | |
| 1307 #endif | |
| 1308 va_end (vargs); | |
| 3734 | 1309 |
| 1310 eicpy_ext(eimodule, module, Qbinary); | |
| 1311 eicpy_ext(eiwarnstr, warn_str, Qbinary); | |
| 1312 | |
| 428 | 1313 warn_when_safe (Qtiff, Qinfo, "%s - %s", |
| 3734 | 1314 eidata(eimodule), |
| 1315 eidata(eiwarnstr)); | |
| 428 | 1316 } |
| 1317 | |
| 1318 static void | |
| 1319 tiff_instantiate (Lisp_Object image_instance, Lisp_Object instantiator, | |
| 2959 | 1320 Lisp_Object pointer_fg, Lisp_Object pointer_bg, |
| 428 | 1321 int dest_mask, Lisp_Object domain) |
| 1322 { | |
| 440 | 1323 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); |
| 428 | 1324 tiff_memory_storage mem_struct; |
| 1325 /* It is OK for the unwind data to be local to this function, | |
| 1326 because the unwind-protect is always executed when this | |
| 1327 stack frame is still valid. */ | |
| 1328 struct tiff_unwind_data unwind; | |
| 1329 int speccount = specpdl_depth (); | |
| 1330 uint32 width, height; | |
| 1331 | |
| 1332 xzero (unwind); | |
| 1333 record_unwind_protect (tiff_instantiate_unwind, make_opaque_ptr (&unwind)); | |
| 1334 | |
| 1335 /* set up error facilities */ | |
| 1336 if (setjmp (tiff_err_data.setjmp_buffer)) | |
| 1337 { | |
| 1338 /* An error was signaled. No clean up is needed, as unwind handles that | |
| 1339 for us. Just pass the error along. */ | |
| 1340 signal_image_error_2 ("TIFF decoding error", | |
|
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1341 build_extstring (tiff_err_data.err_str, |
|
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1342 Qerror_message_encoding), |
| 428 | 1343 instantiator); |
| 1344 } | |
| 1345 TIFFSetErrorHandler ((TIFFErrorHandler)tiff_error_func); | |
| 1346 TIFFSetWarningHandler ((TIFFErrorHandler)tiff_warning_func); | |
| 1347 { | |
| 1348 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data); | |
| 2367 | 1349 Binbyte *bytes; |
| 665 | 1350 Bytecount len; |
| 428 | 1351 |
| 1352 uint32 *raster; | |
| 2367 | 1353 Binbyte *ep; |
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1354 UINT_64_BIT pixels_sq; |
| 428 | 1355 |
| 1356 assert (!NILP (data)); | |
| 1357 | |
| 1358 /* #### This is a definite problem under Mule due to the amount of | |
| 1359 stack data it might allocate. Think about Lstreams... */ | |
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1360 LISP_STRING_TO_SIZED_EXTERNAL (data, bytes, len, Qbinary); |
| 428 | 1361 mem_struct.bytes = bytes; |
| 1362 mem_struct.len = len; | |
| 1363 mem_struct.index = 0; | |
| 1364 | |
| 442 | 1365 unwind.tiff = TIFFClientOpen ("memfile", "r", (thandle_t) &mem_struct, |
| 428 | 1366 (TIFFReadWriteProc)tiff_memory_read, |
| 1367 (TIFFReadWriteProc)tiff_memory_write, | |
| 1368 tiff_memory_seek, tiff_memory_close, tiff_memory_size, | |
| 1369 tiff_map_noop, tiff_unmap_noop); | |
| 1370 if (!unwind.tiff) | |
| 440 | 1371 signal_image_error ("Insufficient memory to instantiate TIFF image", instantiator); |
| 428 | 1372 |
| 1373 TIFFGetField (unwind.tiff, TIFFTAG_IMAGEWIDTH, &width); | |
| 1374 TIFFGetField (unwind.tiff, TIFFTAG_IMAGELENGTH, &height); | |
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1375 pixels_sq = (UINT_64_BIT) width * (UINT_64_BIT) height; |
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1376 if (pixels_sq >= 1 << 29) |
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1377 signal_image_error ("TIFF image too large to instantiate", instantiator); |
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1378 unwind.eimage = xnew_binbytes ((size_t) pixels_sq * 3); |
| 428 | 1379 |
| 440 | 1380 /* #### This is little more than proof-of-concept/function testing. |
| 428 | 1381 It needs to be reimplemented via scanline reads for both memory |
| 1382 compactness. */ | |
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1383 raster = (uint32*) _TIFFmalloc ((tsize_t) (pixels_sq * sizeof (uint32))); |
| 428 | 1384 if (raster != NULL) |
| 1385 { | |
| 647 | 1386 int i, j; |
| 428 | 1387 uint32 *rp; |
| 1388 ep = unwind.eimage; | |
| 1389 rp = raster; | |
| 1390 if (TIFFReadRGBAImage (unwind.tiff, width, height, raster, 0)) | |
| 1391 { | |
| 1392 for (i = height - 1; i >= 0; i--) | |
| 1393 { | |
| 1394 /* This is to get around weirdness in the libtiff library where properly | |
| 1395 made TIFFs will come out upside down. libtiff bug or jhod-brainlock? */ | |
| 1396 rp = raster + (i * width); | |
| 647 | 1397 for (j = 0; j < (int) width; j++) |
| 428 | 1398 { |
| 2367 | 1399 *ep++ = (Binbyte)TIFFGetR(*rp); |
| 1400 *ep++ = (Binbyte)TIFFGetG(*rp); | |
| 1401 *ep++ = (Binbyte)TIFFGetB(*rp); | |
| 428 | 1402 rp++; |
| 1403 } | |
| 1404 } | |
| 1405 } | |
| 1406 _TIFFfree (raster); | |
| 1407 } else | |
| 1408 signal_image_error ("Unable to allocate memory for TIFFReadRGBA", instantiator); | |
| 1409 | |
| 1410 } | |
| 1411 | |
| 1412 /* now instantiate */ | |
| 442 | 1413 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain), |
| 428 | 1414 init_image_instance_from_eimage, |
| 1415 (ii, width, height, 1, unwind.eimage, dest_mask, | |
| 2959 | 1416 instantiator, pointer_fg, pointer_bg, domain)); |
| 428 | 1417 |
| 771 | 1418 unbind_to (speccount); |
| 428 | 1419 } |
| 1420 | |
| 1421 #endif /* HAVE_TIFF */ | |
| 1422 | |
| 1423 | |
| 1424 /************************************************************************/ | |
| 1425 /* initialization */ | |
| 1426 /************************************************************************/ | |
| 1427 | |
| 1428 void | |
| 1429 syms_of_glyphs_eimage (void) | |
| 1430 { | |
| 1431 } | |
| 1432 | |
| 1433 void | |
| 1434 image_instantiator_format_create_glyphs_eimage (void) | |
| 1435 { | |
| 1436 /* image-instantiator types */ | |
| 1437 #ifdef HAVE_JPEG | |
| 1438 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (jpeg, "jpeg"); | |
| 1439 | |
| 1440 IIFORMAT_HAS_METHOD (jpeg, validate); | |
| 1441 IIFORMAT_HAS_METHOD (jpeg, normalize); | |
| 1442 IIFORMAT_HAS_METHOD (jpeg, possible_dest_types); | |
| 1443 IIFORMAT_HAS_METHOD (jpeg, instantiate); | |
| 1444 | |
| 1445 IIFORMAT_VALID_KEYWORD (jpeg, Q_data, check_valid_string); | |
| 1446 IIFORMAT_VALID_KEYWORD (jpeg, Q_file, check_valid_string); | |
| 1447 #endif | |
| 1448 | |
| 1449 #ifdef HAVE_GIF | |
| 1450 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (gif, "gif"); | |
| 1451 | |
| 1452 IIFORMAT_HAS_METHOD (gif, validate); | |
| 1453 IIFORMAT_HAS_METHOD (gif, normalize); | |
| 1454 IIFORMAT_HAS_METHOD (gif, possible_dest_types); | |
| 1455 IIFORMAT_HAS_METHOD (gif, instantiate); | |
| 1456 | |
| 1457 IIFORMAT_VALID_KEYWORD (gif, Q_data, check_valid_string); | |
| 1458 IIFORMAT_VALID_KEYWORD (gif, Q_file, check_valid_string); | |
| 1459 #endif | |
| 1460 | |
| 1461 #ifdef HAVE_PNG | |
| 1462 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (png, "png"); | |
| 1463 | |
| 1464 IIFORMAT_HAS_METHOD (png, validate); | |
| 1465 IIFORMAT_HAS_METHOD (png, normalize); | |
| 1466 IIFORMAT_HAS_METHOD (png, possible_dest_types); | |
| 1467 IIFORMAT_HAS_METHOD (png, instantiate); | |
| 1468 | |
| 1469 IIFORMAT_VALID_KEYWORD (png, Q_data, check_valid_string); | |
| 1470 IIFORMAT_VALID_KEYWORD (png, Q_file, check_valid_string); | |
| 1471 #endif | |
| 1472 | |
| 1473 #ifdef HAVE_TIFF | |
| 1474 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (tiff, "tiff"); | |
| 1475 | |
| 1476 IIFORMAT_HAS_METHOD (tiff, validate); | |
| 1477 IIFORMAT_HAS_METHOD (tiff, normalize); | |
| 1478 IIFORMAT_HAS_METHOD (tiff, possible_dest_types); | |
| 1479 IIFORMAT_HAS_METHOD (tiff, instantiate); | |
| 1480 | |
| 1481 IIFORMAT_VALID_KEYWORD (tiff, Q_data, check_valid_string); | |
| 1482 IIFORMAT_VALID_KEYWORD (tiff, Q_file, check_valid_string); | |
| 1483 #endif | |
| 1484 | |
| 1485 } | |
| 1486 | |
| 1487 void | |
| 1488 vars_of_glyphs_eimage (void) | |
| 1489 { | |
| 1490 #ifdef HAVE_JPEG | |
| 1491 Fprovide (Qjpeg); | |
| 1492 #endif | |
| 1493 | |
| 1494 #ifdef HAVE_GIF | |
| 1495 Fprovide (Qgif); | |
| 1496 #endif | |
| 1497 | |
| 1498 #ifdef HAVE_PNG | |
| 1499 Fprovide (Qpng); | |
| 1500 #endif | |
| 1501 | |
| 1502 #ifdef HAVE_TIFF | |
| 1503 Fprovide (Qtiff); | |
| 1504 #endif | |
| 1505 | |
| 1506 } |