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278
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1 /* EImage-specific Lisp objects.
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2 Copyright (C) 1993, 1994, 1998 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Board of Trustees, University of Illinois.
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4 Copyright (C) 1995 Tinker Systems
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5 Copyright (C) 1995, 1996 Ben Wing
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6 Copyright (C) 1995 Sun Microsystems
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7
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8 This file is part of XEmacs.
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9
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10 XEmacs is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 2, or (at your option) any
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13 later version.
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14
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15 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with XEmacs; see the file COPYING. If not, write to
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22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 Boston, MA 02111-1307, USA. */
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24
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25 /* Synched up with: Not in FSF. */
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26
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27 /* Original author: Jamie Zawinski for 19.8
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28 font-truename stuff added by Jamie Zawinski for 19.10
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29 subwindow support added by Chuck Thompson
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30 additional XPM support added by Chuck Thompson
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31 initial X-Face support added by Stig
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32 rewritten/restructured by Ben Wing for 19.12/19.13
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33 GIF/JPEG support added by Ben Wing for 19.14
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34 PNG support added by Bill Perry for 19.14
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35 Improved GIF/JPEG support added by Bill Perry for 19.14
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36 Cleanup/simplification of error handling by Ben Wing for 19.14
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37 Pointer/icon overhaul, more restructuring by Ben Wing for 19.14
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290
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38 GIF support changed to external Gifreader lib by Jareth Hein for 21.0
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278
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39 Many changes for color work and optimizations by Jareth Hein for 21.0
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40 Switch of GIF/JPEG/PNG to new EImage intermediate code by Jareth Hein for 21.0
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41 TIFF code by Jareth Hein for 21.0
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42 Generalization for ms-windows by Andy Piper for 21.0
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43 TODO:
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44 Convert images.el to C and stick it in here?
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45 */
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46
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47 #include <config.h>
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48 #include "lisp.h"
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49 #include "lstream.h"
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50 #include "console.h"
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51 #include "device.h"
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373
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52 #include "faces.h"
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278
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53 #include "glyphs.h"
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54 #include "objects.h"
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55
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56 #include "buffer.h"
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57 #include "frame.h"
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58 #include "opaque.h"
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408
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59 #include "window.h"
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278
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60
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61 #include "sysfile.h"
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62
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63 #ifdef HAVE_PNG
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64 #ifdef __cplusplus
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65 extern "C" {
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66 #endif
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67 #include <png.h>
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68 #ifdef __cplusplus
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69 }
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70 #endif
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71 #else
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72 #include <setjmp.h>
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73 #endif
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74 #ifdef FILE_CODING
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75 #include "file-coding.h"
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76 #endif
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77
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78 #ifdef HAVE_TIFF
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79 DEFINE_IMAGE_INSTANTIATOR_FORMAT (tiff);
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80 Lisp_Object Qtiff;
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81 #endif
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82
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83 #ifdef HAVE_JPEG
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84 DEFINE_IMAGE_INSTANTIATOR_FORMAT (jpeg);
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85 Lisp_Object Qjpeg;
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86 #endif
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87
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88 #ifdef HAVE_GIF
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89 DEFINE_IMAGE_INSTANTIATOR_FORMAT (gif);
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90 Lisp_Object Qgif;
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91 #endif
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92
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93 #ifdef HAVE_PNG
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94 DEFINE_IMAGE_INSTANTIATOR_FORMAT (png);
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95 Lisp_Object Qpng;
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96 #endif
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97
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98
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99 #ifdef HAVE_JPEG
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100
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101 /**********************************************************************
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102 * JPEG *
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103 **********************************************************************/
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104
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105 #ifdef __cplusplus
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106 extern "C" {
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107 #endif
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108 #include <jpeglib.h>
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109 #include <jerror.h>
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110 #ifdef __cplusplus
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111 }
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112 #endif
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113
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114 /*#define USE_TEMP_FILES_FOR_JPEG_IMAGES 1*/
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115 static void
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116 jpeg_validate (Lisp_Object instantiator)
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117 {
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118 file_or_data_must_be_present (instantiator);
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119 }
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120
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121 static Lisp_Object
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122 jpeg_normalize (Lisp_Object inst, Lisp_Object console_type)
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123 {
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124 return simple_image_type_normalize (inst, console_type, Qjpeg);
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125 }
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126
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127 static int
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128 jpeg_possible_dest_types (void)
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129 {
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130 return IMAGE_COLOR_PIXMAP_MASK;
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131 }
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132
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133 /* To survive the otherwise baffling complexity of making sure
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134 everything gets cleaned up in the presence of an error, we
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135 use an unwind_protect(). */
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136
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137 struct jpeg_unwind_data
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138 {
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139 /* Stream that we need to close */
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140 FILE *instream;
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141 /* Object that holds state info for JPEG decoding */
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142 struct jpeg_decompress_struct *cinfo_ptr;
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143 /* EImage data */
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144 unsigned char *eimage;
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145 };
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146
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147 static Lisp_Object
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148 jpeg_instantiate_unwind (Lisp_Object unwind_obj)
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149 {
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150 struct jpeg_unwind_data *data =
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151 (struct jpeg_unwind_data *) get_opaque_ptr (unwind_obj);
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152
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153 free_opaque_ptr (unwind_obj);
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154 if (data->cinfo_ptr)
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155 jpeg_destroy_decompress (data->cinfo_ptr);
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156
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157 if (data->instream)
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158 fclose (data->instream);
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159
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160 if (data->eimage) xfree (data->eimage);
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161
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162 return Qnil;
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163 }
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164
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165 /*
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166 * ERROR HANDLING:
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167 *
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168 * The JPEG library's standard error handler (jerror.c) is divided into
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169 * several "methods" which you can override individually. This lets you
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170 * adjust the behavior without duplicating a lot of code, which you might
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171 * have to update with each future release.
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172 *
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173 * Our example here shows how to override the "error_exit" method so that
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174 * control is returned to the library's caller when a fatal error occurs,
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175 * rather than calling exit() as the standard error_exit method does.
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176 *
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177 * We use C's setjmp/longjmp facility to return control. This means that the
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178 * routine which calls the JPEG library must first execute a setjmp() call to
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179 * establish the return point. We want the replacement error_exit to do a
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180 * longjmp(). But we need to make the setjmp buffer accessible to the
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181 * error_exit routine. To do this, we make a private extension of the
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182 * standard JPEG error handler object. (If we were using C++, we'd say we
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183 * were making a subclass of the regular error handler.)
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184 *
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185 * Here's the extended error handler struct:
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186 */
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187
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188 struct my_jpeg_error_mgr
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189 {
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190 struct jpeg_error_mgr pub; /* "public" fields */
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191 jmp_buf setjmp_buffer; /* for return to caller */
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192 };
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193
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194 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61)
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195 METHODDEF(void)
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196 #else
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197 METHODDEF void
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198 #endif
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199 our_init_source (j_decompress_ptr cinfo)
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200 {
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201 }
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202
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203 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61)
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204 METHODDEF(boolean)
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205 #else
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206 METHODDEF boolean
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207 #endif
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208 our_fill_input_buffer (j_decompress_ptr cinfo)
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209 {
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210 /* Insert a fake EOI marker */
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211 struct jpeg_source_mgr *src = cinfo->src;
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212 static JOCTET buffer[2];
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213
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214 buffer[0] = (JOCTET) 0xFF;
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215 buffer[1] = (JOCTET) JPEG_EOI;
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216
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217 src->next_input_byte = buffer;
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218 src->bytes_in_buffer = 2;
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219 return TRUE;
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220 }
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221
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222 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61)
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223 METHODDEF(void)
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224 #else
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225 METHODDEF void
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226 #endif
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227 our_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
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228 {
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229 struct jpeg_source_mgr *src = NULL;
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230
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231 src = (struct jpeg_source_mgr *) cinfo->src;
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232
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233 if (!src)
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234 {
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235 return;
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236 } else if (num_bytes > src->bytes_in_buffer)
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237 {
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238 ERREXIT(cinfo, JERR_INPUT_EOF);
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239 /*NOTREACHED*/
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240 }
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241
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242 src->bytes_in_buffer -= num_bytes;
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243 src->next_input_byte += num_bytes;
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244 }
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245
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246 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61)
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247 METHODDEF(void)
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248 #else
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249 METHODDEF void
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250 #endif
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251 our_term_source (j_decompress_ptr cinfo)
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252 {
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253 }
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254
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255 typedef struct
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256 {
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257 struct jpeg_source_mgr pub;
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258 } our_jpeg_source_mgr;
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259
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260 static void
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261 jpeg_memory_src (j_decompress_ptr cinfo, JOCTET *data, unsigned int len)
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262 {
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263 struct jpeg_source_mgr *src;
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264
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265 if (cinfo->src == NULL)
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266 { /* first time for this JPEG object? */
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267 cinfo->src = (struct jpeg_source_mgr *)
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268 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
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269 sizeof(our_jpeg_source_mgr));
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270 src = (struct jpeg_source_mgr *) cinfo->src;
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271 src->next_input_byte = data;
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272 }
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273 src = (struct jpeg_source_mgr *) cinfo->src;
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274 src->init_source = our_init_source;
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275 src->fill_input_buffer = our_fill_input_buffer;
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276 src->skip_input_data = our_skip_input_data;
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277 src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
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278 src->term_source = our_term_source;
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279 src->bytes_in_buffer = len;
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280 src->next_input_byte = data;
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281 }
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282
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283 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61)
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284 METHODDEF(void)
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285 #else
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286 METHODDEF void
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287 #endif
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288 my_jpeg_error_exit (j_common_ptr cinfo)
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289 {
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290 /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
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291 struct my_jpeg_error_mgr *myerr = (struct my_jpeg_error_mgr *) cinfo->err;
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292
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293 /* Return control to the setjmp point */
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294 longjmp (myerr->setjmp_buffer, 1);
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295 }
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296
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297 #if defined(JPEG_LIB_VERSION) && (JPEG_LIB_VERSION >= 61)
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298 METHODDEF(void)
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299 #else
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300 METHODDEF void
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301 #endif
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302 my_jpeg_output_message (j_common_ptr cinfo)
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303 {
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304 char buffer[JMSG_LENGTH_MAX];
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305
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306 /* Create the message */
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307 (*cinfo->err->format_message) (cinfo, buffer);
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308 warn_when_safe (Qjpeg, Qinfo, "%s", buffer);
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309 }
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310
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311 /* The code in this routine is based on example.c from the JPEG library
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312 source code and from gif_instantiate() */
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313 static void
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314 jpeg_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
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315 Lisp_Object pointer_fg, Lisp_Object pointer_bg,
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316 int dest_mask, Lisp_Object domain)
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317 {
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398
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318 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
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278
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319 /* It is OK for the unwind data to be local to this function,
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320 because the unwind-protect is always executed when this
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321 stack frame is still valid. */
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322 struct jpeg_unwind_data unwind;
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323 int speccount = specpdl_depth ();
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324
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325 /* This struct contains the JPEG decompression parameters and pointers to
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326 * working space (which is allocated as needed by the JPEG library).
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327 */
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328 struct jpeg_decompress_struct cinfo;
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329 /* We use our private extension JPEG error handler.
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330 * Note that this struct must live as long as the main JPEG parameter
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331 * struct, to avoid dangling-pointer problems.
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332 */
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333 struct my_jpeg_error_mgr jerr;
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334
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335 /* Step -1: First record our unwind-protect, which will clean up after
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336 any exit, normal or not */
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337
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338 xzero (unwind);
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339 record_unwind_protect (jpeg_instantiate_unwind, make_opaque_ptr (&unwind));
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340
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341 /* Step 1: allocate and initialize JPEG decompression object */
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342
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343 /* We set up the normal JPEG error routines, then override error_exit. */
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344 cinfo.err = jpeg_std_error (&jerr.pub);
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345 jerr.pub.error_exit = my_jpeg_error_exit;
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346 jerr.pub.output_message = my_jpeg_output_message;
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347
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348 /* Establish the setjmp return context for my_error_exit to use. */
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349 if (setjmp (jerr.setjmp_buffer))
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350 {
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351 /* If we get here, the JPEG code has signaled an error.
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352 * We need to clean up the JPEG object, close the input file, and return.
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353 */
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354
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355 {
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356 Lisp_Object errstring;
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357 char buffer[JMSG_LENGTH_MAX];
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358
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359 /* Create the message */
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360 (*cinfo.err->format_message) ((j_common_ptr) &cinfo, buffer);
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361 errstring = build_string (buffer);
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362
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363 signal_image_error_2 ("JPEG decoding error",
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364 errstring, instantiator);
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365 }
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366 }
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367
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368 /* Now we can initialize the JPEG decompression object. */
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369 jpeg_create_decompress (&cinfo);
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370 unwind.cinfo_ptr = &cinfo;
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371
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372 /* Step 2: specify data source (eg, a file) */
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373
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374 {
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375 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
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398
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376 const Extbyte *bytes;
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278
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377 Extcount len;
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378
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379 /* #### This is a definite problem under Mule due to the amount of
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380 stack data it might allocate. Need to be able to convert and
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381 write out to a file. */
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398
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382 TO_EXTERNAL_FORMAT (LISP_STRING, data, ALLOCA, (bytes, len), Qbinary);
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278
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383 jpeg_memory_src (&cinfo, (JOCTET *) bytes, len);
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384 }
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385
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386 /* Step 3: read file parameters with jpeg_read_header() */
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387
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388 jpeg_read_header (&cinfo, TRUE);
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389 /* We can ignore the return value from jpeg_read_header since
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390 * (a) suspension is not possible with the stdio data source, and
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391 * (b) we passed TRUE to reject a tables-only JPEG file as an error.
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|
392 * See libjpeg.doc for more info.
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393 */
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394
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|
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395 {
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|
290
|
396 int jpeg_gray = 0; /* if we're dealing with a grayscale */
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278
|
397 /* Step 4: set parameters for decompression. */
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398
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290
|
399 /* Now that we're using EImages, send all data as 24bit color.
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|
400 The backend routine will take care of any necessary reductions.
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401 We do have to handle the grayscale case ourselves, however. */
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402 if (cinfo.jpeg_color_space == JCS_GRAYSCALE)
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403 {
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404 cinfo.out_color_space = JCS_GRAYSCALE;
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|
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405 jpeg_gray = 1;
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|
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406 }
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|
|
407 else
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|
|
408 {
|
|
|
409 /* we're relying on the jpeg driver to do any other conversions,
|
|
|
410 or signal an error if the conversion isn't supported. */
|
|
380
|
411 cinfo.out_color_space = JCS_RGB;
|
|
290
|
412 }
|
|
278
|
413
|
|
|
414 /* Step 5: Start decompressor */
|
|
|
415 jpeg_start_decompress (&cinfo);
|
|
|
416
|
|
|
417 /* Step 6: Read in the data and put into EImage format (8bit RGB triples)*/
|
|
|
418
|
|
|
419 unwind.eimage = (unsigned char*) xmalloc (cinfo.output_width * cinfo.output_height * 3);
|
|
|
420 if (!unwind.eimage)
|
|
|
421 signal_image_error("Unable to allocate enough memory for image", instantiator);
|
|
|
422
|
|
|
423 {
|
|
|
424 JSAMPARRAY row_buffer; /* Output row buffer */
|
|
|
425 JSAMPLE *jp;
|
|
|
426 int row_stride; /* physical row width in output buffer */
|
|
|
427 unsigned char *op = unwind.eimage;
|
|
|
428
|
|
|
429 /* We may need to do some setup of our own at this point before reading
|
|
|
430 * the data. After jpeg_start_decompress() we have the correct scaled
|
|
|
431 * output image dimensions available
|
|
|
432 * We need to make an output work buffer of the right size.
|
|
|
433 */
|
|
|
434 /* JSAMPLEs per row in output buffer. */
|
|
|
435 row_stride = cinfo.output_width * cinfo.output_components;
|
|
|
436 /* Make a one-row-high sample array that will go away when done
|
|
|
437 with image */
|
|
|
438 row_buffer = ((*cinfo.mem->alloc_sarray)
|
|
|
439 ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1));
|
|
|
440
|
|
|
441 /* Here we use the library's state variable cinfo.output_scanline as the
|
|
|
442 * loop counter, so that we don't have to keep track ourselves.
|
|
|
443 */
|
|
|
444 while (cinfo.output_scanline < cinfo.output_height)
|
|
|
445 {
|
|
|
446 int i;
|
|
|
447
|
|
|
448 /* jpeg_read_scanlines expects an array of pointers to scanlines.
|
|
|
449 * Here the array is only one element long, but you could ask for
|
|
|
450 * more than one scanline at a time if that's more convenient.
|
|
|
451 */
|
|
|
452 (void) jpeg_read_scanlines (&cinfo, row_buffer, 1);
|
|
|
453 jp = row_buffer[0];
|
|
|
454 for (i = 0; i < cinfo.output_width; i++)
|
|
|
455 {
|
|
|
456 int clr;
|
|
380
|
457 if (jpeg_gray)
|
|
290
|
458 {
|
|
|
459 unsigned char val;
|
|
278
|
460 #if (BITS_IN_JSAMPLE == 8)
|
|
290
|
461 val = (unsigned char)*jp++;
|
|
278
|
462 #else /* other option is 12 */
|
|
290
|
463 val = (unsigned char)(*jp++ >> 4);
|
|
278
|
464 #endif
|
|
290
|
465 for (clr = 0; clr < 3; clr++) /* copy the same value into RGB */
|
|
|
466 *op++ = val;
|
|
|
467 }
|
|
|
468 else
|
|
|
469 {
|
|
|
470 for (clr = 0; clr < 3; clr++)
|
|
|
471 #if (BITS_IN_JSAMPLE == 8)
|
|
|
472 *op++ = (unsigned char)*jp++;
|
|
|
473 #else /* other option is 12 */
|
|
|
474 *op++ = (unsigned char)(*jp++ >> 4);
|
|
|
475 #endif
|
|
|
476 }
|
|
278
|
477 }
|
|
|
478 }
|
|
|
479 }
|
|
|
480 }
|
|
|
481
|
|
|
482 /* Step 6.5: Create the pixmap and set up the image instance */
|
|
|
483 /* now instantiate */
|
|
408
|
484 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain),
|
|
278
|
485 init_image_instance_from_eimage,
|
|
398
|
486 (ii, cinfo.output_width, cinfo.output_height, 1,
|
|
380
|
487 unwind.eimage, dest_mask,
|
|
278
|
488 instantiator, domain));
|
|
|
489
|
|
|
490 /* Step 7: Finish decompression */
|
|
|
491
|
|
|
492 jpeg_finish_decompress (&cinfo);
|
|
|
493 /* We can ignore the return value since suspension is not possible
|
|
|
494 * with the stdio data source.
|
|
|
495 */
|
|
|
496
|
|
|
497 /* And we're done! */
|
|
|
498 /* This will clean up everything else. */
|
|
|
499 unbind_to (speccount, Qnil);
|
|
|
500 }
|
|
|
501
|
|
|
502 #endif /* HAVE_JPEG */
|
|
|
503
|
|
|
504 #ifdef HAVE_GIF
|
|
|
505 /**********************************************************************
|
|
|
506 * GIF *
|
|
|
507 **********************************************************************/
|
|
|
508
|
|
373
|
509 #include "gifrlib.h"
|
|
278
|
510
|
|
|
511 static void
|
|
|
512 gif_validate (Lisp_Object instantiator)
|
|
|
513 {
|
|
|
514 file_or_data_must_be_present (instantiator);
|
|
|
515 }
|
|
|
516
|
|
|
517 static Lisp_Object
|
|
|
518 gif_normalize (Lisp_Object inst, Lisp_Object console_type)
|
|
|
519 {
|
|
|
520 return simple_image_type_normalize (inst, console_type, Qgif);
|
|
|
521 }
|
|
|
522
|
|
|
523 static int
|
|
|
524 gif_possible_dest_types (void)
|
|
|
525 {
|
|
|
526 return IMAGE_COLOR_PIXMAP_MASK;
|
|
|
527 }
|
|
|
528
|
|
|
529 /* To survive the otherwise baffling complexity of making sure
|
|
|
530 everything gets cleaned up in the presence of an error, we
|
|
|
531 use an unwind_protect(). */
|
|
|
532
|
|
|
533 struct gif_unwind_data
|
|
|
534 {
|
|
|
535 unsigned char *eimage;
|
|
|
536 /* Object that holds the decoded data from a GIF file */
|
|
|
537 GifFileType *giffile;
|
|
|
538 };
|
|
|
539
|
|
|
540 static Lisp_Object
|
|
|
541 gif_instantiate_unwind (Lisp_Object unwind_obj)
|
|
|
542 {
|
|
|
543 struct gif_unwind_data *data =
|
|
|
544 (struct gif_unwind_data *) get_opaque_ptr (unwind_obj);
|
|
|
545
|
|
|
546 free_opaque_ptr (unwind_obj);
|
|
|
547 if (data->giffile)
|
|
|
548 {
|
|
|
549 DGifCloseFile (data->giffile);
|
|
|
550 GifFree(data->giffile);
|
|
|
551 }
|
|
|
552 if (data->eimage) xfree(data->eimage);
|
|
|
553
|
|
|
554 return Qnil;
|
|
|
555 }
|
|
|
556
|
|
|
557 typedef struct gif_memory_storage
|
|
|
558 {
|
|
|
559 Extbyte *bytes; /* The data */
|
|
|
560 Extcount len; /* How big is it? */
|
|
|
561 int index; /* Where are we? */
|
|
|
562 } gif_memory_storage;
|
|
|
563
|
|
|
564 static size_t
|
|
|
565 gif_read_from_memory(GifByteType *buf, size_t size, VoidPtr data)
|
|
|
566 {
|
|
|
567 gif_memory_storage *mem = (gif_memory_storage*)data;
|
|
380
|
568
|
|
278
|
569 if (size > (mem->len - mem->index))
|
|
380
|
570 return (size_t) -1;
|
|
278
|
571 memcpy(buf, mem->bytes + mem->index, size);
|
|
|
572 mem->index = mem->index + size;
|
|
|
573 return size;
|
|
|
574 }
|
|
|
575
|
|
|
576 static int
|
|
|
577 gif_memory_close(VoidPtr data)
|
|
|
578 {
|
|
|
579 return 0;
|
|
|
580 }
|
|
|
581
|
|
|
582 struct gif_error_struct
|
|
|
583 {
|
|
398
|
584 const char *err_str; /* return the error string */
|
|
278
|
585 jmp_buf setjmp_buffer; /* for return to caller */
|
|
|
586 };
|
|
|
587
|
|
|
588 static void
|
|
398
|
589 gif_error_func(const char *err_str, VoidPtr error_ptr)
|
|
278
|
590 {
|
|
|
591 struct gif_error_struct *error_data = (struct gif_error_struct*)error_ptr;
|
|
|
592
|
|
|
593 /* return to setjmp point */
|
|
|
594 error_data->err_str = err_str;
|
|
|
595 longjmp (error_data->setjmp_buffer, 1);
|
|
|
596 }
|
|
|
597
|
|
|
598 static void
|
|
|
599 gif_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
|
|
|
600 Lisp_Object pointer_fg, Lisp_Object pointer_bg,
|
|
|
601 int dest_mask, Lisp_Object domain)
|
|
|
602 {
|
|
398
|
603 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
|
|
278
|
604 /* It is OK for the unwind data to be local to this function,
|
|
|
605 because the unwind-protect is always executed when this
|
|
|
606 stack frame is still valid. */
|
|
|
607 struct gif_unwind_data unwind;
|
|
|
608 int speccount = specpdl_depth ();
|
|
|
609 gif_memory_storage mem_struct;
|
|
|
610 struct gif_error_struct gif_err;
|
|
|
611 Extbyte *bytes;
|
|
|
612 Extcount len;
|
|
|
613 int height = 0;
|
|
|
614 int width = 0;
|
|
380
|
615
|
|
278
|
616 xzero (unwind);
|
|
|
617 record_unwind_protect (gif_instantiate_unwind, make_opaque_ptr (&unwind));
|
|
380
|
618
|
|
278
|
619 /* 1. Now decode the data. */
|
|
380
|
620
|
|
278
|
621 {
|
|
|
622 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
|
|
380
|
623
|
|
278
|
624 assert (!NILP (data));
|
|
380
|
625
|
|
278
|
626 if (!(unwind.giffile = GifSetup()))
|
|
398
|
627 signal_image_error ("Insufficient memory to instantiate GIF image", instantiator);
|
|
380
|
628
|
|
278
|
629 /* set up error facilities */
|
|
|
630 if (setjmp(gif_err.setjmp_buffer))
|
|
|
631 {
|
|
|
632 /* An error was signaled. No clean up is needed, as unwind handles that
|
|
|
633 for us. Just pass the error along. */
|
|
|
634 Lisp_Object errstring;
|
|
|
635 errstring = build_string (gif_err.err_str);
|
|
|
636 signal_image_error_2 ("GIF decoding error", errstring, instantiator);
|
|
|
637 }
|
|
|
638 GifSetErrorFunc(unwind.giffile, (Gif_error_func)gif_error_func, (VoidPtr)&gif_err);
|
|
380
|
639
|
|
398
|
640 TO_EXTERNAL_FORMAT (LISP_STRING, data, ALLOCA, (bytes, len), Qbinary);
|
|
278
|
641 mem_struct.bytes = bytes;
|
|
|
642 mem_struct.len = len;
|
|
|
643 mem_struct.index = 0;
|
|
|
644 GifSetReadFunc(unwind.giffile, gif_read_from_memory, (VoidPtr)&mem_struct);
|
|
|
645 GifSetCloseFunc(unwind.giffile, gif_memory_close, (VoidPtr)&mem_struct);
|
|
|
646 DGifInitRead(unwind.giffile);
|
|
380
|
647
|
|
278
|
648 /* Then slurp the image into memory, decoding along the way.
|
|
|
649 The result is the image in a simple one-byte-per-pixel
|
|
|
650 format (#### the GIF routines only support 8-bit GIFs,
|
|
|
651 it appears). */
|
|
|
652 DGifSlurp (unwind.giffile);
|
|
|
653 }
|
|
380
|
654
|
|
398
|
655 /* 3. Now create the EImage(s) */
|
|
278
|
656 {
|
|
|
657 ColorMapObject *cmo = unwind.giffile->SColorMap;
|
|
398
|
658 int i, j, row, pass, interlace, slice;
|
|
278
|
659 unsigned char *eip;
|
|
|
660 /* interlaced gifs have rows in this order:
|
|
|
661 0, 8, 16, ..., 4, 12, 20, ..., 2, 6, 10, ..., 1, 3, 5, ... */
|
|
|
662 static int InterlacedOffset[] = { 0, 4, 2, 1 };
|
|
|
663 static int InterlacedJumps[] = { 8, 8, 4, 2 };
|
|
380
|
664
|
|
278
|
665 height = unwind.giffile->SHeight;
|
|
|
666 width = unwind.giffile->SWidth;
|
|
398
|
667 unwind.eimage = (unsigned char*)
|
|
|
668 xmalloc (width * height * 3 * unwind.giffile->ImageCount);
|
|
278
|
669 if (!unwind.eimage)
|
|
|
670 signal_image_error("Unable to allocate enough memory for image", instantiator);
|
|
380
|
671
|
|
278
|
672 /* write the data in EImage format (8bit RGB triples) */
|
|
380
|
673
|
|
398
|
674 for (slice = 0; slice < unwind.giffile->ImageCount; slice++)
|
|
278
|
675 {
|
|
398
|
676 /* We check here that that the current image covers the full "screen" size. */
|
|
|
677 if (unwind.giffile->SavedImages[slice].ImageDesc.Height != height
|
|
|
678 || unwind.giffile->SavedImages[slice].ImageDesc.Width != width
|
|
|
679 || unwind.giffile->SavedImages[slice].ImageDesc.Left != 0
|
|
|
680 || unwind.giffile->SavedImages[slice].ImageDesc.Top != 0)
|
|
|
681 signal_image_error ("Image in GIF file is not full size",
|
|
|
682 instantiator);
|
|
|
683
|
|
|
684 interlace = unwind.giffile->SavedImages[slice].ImageDesc.Interlace;
|
|
|
685 pass = 0;
|
|
|
686 row = interlace ? InterlacedOffset[pass] : 0;
|
|
|
687 eip = unwind.eimage + (width * height * 3 * slice);
|
|
|
688 for (i = 0; i < height; i++)
|
|
278
|
689 {
|
|
398
|
690 if (interlace)
|
|
|
691 if (row >= height) {
|
|
|
692 row = InterlacedOffset[++pass];
|
|
|
693 while (row >= height)
|
|
|
694 row = InterlacedOffset[++pass];
|
|
|
695 }
|
|
|
696 eip = unwind.eimage + (width * height * 3 * slice) + (row * width * 3);
|
|
|
697 for (j = 0; j < width; j++)
|
|
|
698 {
|
|
|
699 unsigned char pixel =
|
|
|
700 unwind.giffile->SavedImages[slice].RasterBits[(i * width) + j];
|
|
|
701 *eip++ = cmo->Colors[pixel].Red;
|
|
|
702 *eip++ = cmo->Colors[pixel].Green;
|
|
|
703 *eip++ = cmo->Colors[pixel].Blue;
|
|
|
704 }
|
|
|
705 row += interlace ? InterlacedJumps[pass] : 1;
|
|
278
|
706 }
|
|
|
707 }
|
|
398
|
708
|
|
|
709 /* now instantiate */
|
|
408
|
710 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain),
|
|
398
|
711 init_image_instance_from_eimage,
|
|
|
712 (ii, width, height, unwind.giffile->ImageCount, unwind.eimage, dest_mask,
|
|
|
713 instantiator, domain));
|
|
278
|
714 }
|
|
398
|
715
|
|
|
716 /* We read the gif successfully. If we have more than one slice then
|
|
|
717 animate the gif. */
|
|
|
718 if (unwind.giffile->ImageCount > 1)
|
|
|
719 {
|
|
|
720 /* See if there is a timeout value. In theory there could be one
|
|
|
721 for every image - but that makes the implementation way to
|
|
|
722 complicated for now so we just take the first. */
|
|
|
723 unsigned short timeout = 0;
|
|
|
724 Lisp_Object tid;
|
|
|
725
|
|
|
726 if (unwind.giffile->SavedImages[0].Function == GRAPHICS_EXT_FUNC_CODE
|
|
|
727 &&
|
|
|
728 unwind.giffile->SavedImages[0].ExtensionBlockCount)
|
|
|
729 {
|
|
|
730 timeout = (unsigned short)
|
|
|
731 ((unwind.giffile->SavedImages[0].ExtensionBlocks[0].Bytes[2] << 8) +
|
|
|
732 unwind.giffile-> SavedImages[0].ExtensionBlocks[0].Bytes[1]) * 10;
|
|
|
733 }
|
|
|
734
|
|
|
735 /* Too short a timeout will crucify us performance-wise. */
|
|
|
736 tid = add_glyph_animated_timeout (timeout > 10 ? timeout : 10, image_instance);
|
|
|
737
|
|
|
738 if (!NILP (tid))
|
|
|
739 IMAGE_INSTANCE_PIXMAP_TIMEOUT (ii) = XINT (tid);
|
|
|
740 }
|
|
380
|
741
|
|
278
|
742 unbind_to (speccount, Qnil);
|
|
|
743 }
|
|
|
744
|
|
|
745 #endif /* HAVE_GIF */
|
|
|
746
|
|
|
747
|
|
|
748 #ifdef HAVE_PNG
|
|
|
749
|
|
|
750 /**********************************************************************
|
|
|
751 * PNG *
|
|
|
752 **********************************************************************/
|
|
|
753 static void
|
|
|
754 png_validate (Lisp_Object instantiator)
|
|
|
755 {
|
|
|
756 file_or_data_must_be_present (instantiator);
|
|
|
757 }
|
|
|
758
|
|
|
759 static Lisp_Object
|
|
|
760 png_normalize (Lisp_Object inst, Lisp_Object console_type)
|
|
|
761 {
|
|
|
762 return simple_image_type_normalize (inst, console_type, Qpng);
|
|
|
763 }
|
|
|
764
|
|
|
765 static int
|
|
|
766 png_possible_dest_types (void)
|
|
|
767 {
|
|
|
768 return IMAGE_COLOR_PIXMAP_MASK;
|
|
|
769 }
|
|
|
770
|
|
|
771 struct png_memory_storage
|
|
|
772 {
|
|
398
|
773 const Extbyte *bytes; /* The data */
|
|
278
|
774 Extcount len; /* How big is it? */
|
|
|
775 int index; /* Where are we? */
|
|
|
776 };
|
|
|
777
|
|
|
778 static void
|
|
|
779 png_read_from_memory(png_structp png_ptr, png_bytep data,
|
|
|
780 png_size_t length)
|
|
|
781 {
|
|
|
782 struct png_memory_storage *tbr =
|
|
|
783 (struct png_memory_storage *) png_get_io_ptr (png_ptr);
|
|
|
784
|
|
|
785 if (length > (tbr->len - tbr->index))
|
|
|
786 png_error (png_ptr, (png_const_charp) "Read Error");
|
|
|
787 memcpy (data,tbr->bytes + tbr->index,length);
|
|
|
788 tbr->index = tbr->index + length;
|
|
|
789 }
|
|
|
790
|
|
|
791 struct png_error_struct
|
|
|
792 {
|
|
398
|
793 const char *err_str;
|
|
278
|
794 jmp_buf setjmp_buffer; /* for return to caller */
|
|
|
795 };
|
|
|
796
|
|
|
797 /* jh 98/03/12 - #### AARRRGH! libpng includes jmp_buf inside its own
|
|
|
798 structure, and there are cases where the size can be different from
|
|
380
|
799 between inside the library, and inside the code! To do an end run
|
|
278
|
800 around this, use our own error functions, and don't rely on things
|
|
|
801 passed in the png_ptr to them. This is an ugly hack and must
|
|
|
802 go away when the lisp engine is threaded! */
|
|
|
803 static struct png_error_struct png_err_stct;
|
|
|
804
|
|
|
805 static void
|
|
|
806 png_error_func (png_structp png_ptr, png_const_charp msg)
|
|
|
807 {
|
|
|
808 png_err_stct.err_str = msg;
|
|
|
809 longjmp (png_err_stct.setjmp_buffer, 1);
|
|
|
810 }
|
|
|
811
|
|
|
812 static void
|
|
|
813 png_warning_func (png_structp png_ptr, png_const_charp msg)
|
|
|
814 {
|
|
|
815 warn_when_safe (Qpng, Qinfo, "%s", msg);
|
|
|
816 }
|
|
|
817
|
|
|
818 struct png_unwind_data
|
|
|
819 {
|
|
|
820 FILE *instream;
|
|
|
821 unsigned char *eimage;
|
|
|
822 png_structp png_ptr;
|
|
|
823 png_infop info_ptr;
|
|
|
824 };
|
|
|
825
|
|
|
826 static Lisp_Object
|
|
|
827 png_instantiate_unwind (Lisp_Object unwind_obj)
|
|
|
828 {
|
|
|
829 struct png_unwind_data *data =
|
|
|
830 (struct png_unwind_data *) get_opaque_ptr (unwind_obj);
|
|
|
831
|
|
|
832 free_opaque_ptr (unwind_obj);
|
|
|
833 if (data->png_ptr)
|
|
|
834 png_destroy_read_struct (&(data->png_ptr), &(data->info_ptr), (png_infopp)NULL);
|
|
|
835 if (data->instream)
|
|
|
836 fclose (data->instream);
|
|
|
837
|
|
373
|
838 if (data->eimage) xfree(data->eimage);
|
|
|
839
|
|
278
|
840 return Qnil;
|
|
|
841 }
|
|
|
842
|
|
|
843 static void
|
|
|
844 png_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
|
|
|
845 Lisp_Object pointer_fg, Lisp_Object pointer_bg,
|
|
|
846 int dest_mask, Lisp_Object domain)
|
|
|
847 {
|
|
398
|
848 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
|
|
278
|
849 struct png_unwind_data unwind;
|
|
|
850 int speccount = specpdl_depth ();
|
|
|
851 int height, width;
|
|
290
|
852 struct png_memory_storage tbr; /* Data to be read */
|
|
278
|
853
|
|
|
854 /* PNG variables */
|
|
|
855 png_structp png_ptr;
|
|
|
856 png_infop info_ptr;
|
|
|
857
|
|
|
858 /* Initialize all PNG structures */
|
|
|
859 png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, (void*)&png_err_stct,
|
|
|
860 png_error_func, png_warning_func);
|
|
|
861 if (!png_ptr)
|
|
|
862 signal_image_error ("Error obtaining memory for png_read", instantiator);
|
|
|
863 info_ptr = png_create_info_struct (png_ptr);
|
|
|
864 if (!info_ptr)
|
|
|
865 {
|
|
|
866 png_destroy_read_struct (&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
|
|
|
867 signal_image_error ("Error obtaining memory for png_read", instantiator);
|
|
|
868 }
|
|
380
|
869
|
|
278
|
870 xzero (unwind);
|
|
|
871 unwind.png_ptr = png_ptr;
|
|
|
872 unwind.info_ptr = info_ptr;
|
|
|
873
|
|
|
874 record_unwind_protect (png_instantiate_unwind, make_opaque_ptr (&unwind));
|
|
|
875
|
|
|
876 /* This code is a mixture of stuff from Ben's GIF/JPEG stuff from
|
|
|
877 this file, example.c from the libpng 0.81 distribution, and the
|
|
|
878 pngtopnm sources. -WMP-
|
|
|
879 */
|
|
|
880 /* It has been further modified to handle the API changes for 0.96,
|
|
|
881 and is no longer usable for previous versions. jh
|
|
|
882 */
|
|
|
883
|
|
380
|
884 /* Set the jmp_buf return context for png_error ... if this returns !0, then
|
|
278
|
885 we ran into a problem somewhere, and need to clean up after ourselves. */
|
|
|
886 if (setjmp (png_err_stct.setjmp_buffer))
|
|
|
887 {
|
|
|
888 /* Something blew up: just display the error (cleanup happens in the unwind) */
|
|
|
889 signal_image_error_2 ("Error decoding PNG",
|
|
|
890 build_string(png_err_stct.err_str),
|
|
|
891 instantiator);
|
|
|
892 }
|
|
|
893
|
|
|
894 /* Initialize the IO layer and read in header information */
|
|
|
895 {
|
|
|
896 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
|
|
398
|
897 const Extbyte *bytes;
|
|
278
|
898 Extcount len;
|
|
|
899
|
|
|
900 assert (!NILP (data));
|
|
|
901
|
|
|
902 /* #### This is a definite problem under Mule due to the amount of
|
|
|
903 stack data it might allocate. Need to think about using Lstreams */
|
|
398
|
904 TO_EXTERNAL_FORMAT (LISP_STRING, data, ALLOCA, (bytes, len), Qbinary);
|
|
278
|
905 tbr.bytes = bytes;
|
|
|
906 tbr.len = len;
|
|
|
907 tbr.index = 0;
|
|
|
908 png_set_read_fn (png_ptr,(void *) &tbr, png_read_from_memory);
|
|
|
909 }
|
|
|
910
|
|
|
911 png_read_info (png_ptr, info_ptr);
|
|
|
912
|
|
|
913 {
|
|
|
914 int y;
|
|
|
915 unsigned char **row_pointers;
|
|
|
916 height = info_ptr->height;
|
|
|
917 width = info_ptr->width;
|
|
|
918
|
|
|
919 /* Wow, allocate all the memory. Truly, exciting. */
|
|
|
920 unwind.eimage = xnew_array_and_zero (unsigned char, width * height * 3);
|
|
|
921 /* libpng expects that the image buffer passed in contains a
|
|
|
922 picture to draw on top of if the png has any transparencies.
|
|
|
923 This could be a good place to pass that in... */
|
|
380
|
924
|
|
278
|
925 row_pointers = xnew_array (png_byte *, height);
|
|
|
926
|
|
|
927 for (y = 0; y < height; y++)
|
|
|
928 row_pointers[y] = unwind.eimage + (width * 3 * y);
|
|
|
929
|
|
373
|
930 {
|
|
|
931 /* if the png specifies a background chunk, go ahead and
|
|
|
932 use it, else use what we can get from the default face. */
|
|
|
933 png_color_16 my_background, *image_background;
|
|
|
934 Lisp_Object bkgd = Qnil;
|
|
|
935
|
|
|
936 my_background.red = 0x7fff;
|
|
|
937 my_background.green = 0x7fff;
|
|
|
938 my_background.blue = 0x7fff;
|
|
|
939 bkgd = FACE_BACKGROUND (Vdefault_face, domain);
|
|
|
940 if (!COLOR_INSTANCEP (bkgd))
|
|
|
941 {
|
|
|
942 warn_when_safe (Qpng, Qinfo, "Couldn't get background color!");
|
|
|
943 }
|
|
|
944 else
|
|
|
945 {
|
|
398
|
946 Lisp_Color_Instance *c;
|
|
373
|
947 Lisp_Object rgblist;
|
|
|
948
|
|
|
949 c = XCOLOR_INSTANCE (bkgd);
|
|
|
950 rgblist = MAYBE_LISP_DEVMETH (XDEVICE (c->device),
|
|
|
951 color_instance_rgb_components,
|
|
|
952 (c));
|
|
404
|
953 my_background.red = (unsigned short) XINT (XCAR (rgblist));
|
|
|
954 my_background.green = (unsigned short) XINT (XCAR (XCDR (rgblist)));
|
|
|
955 my_background.blue = (unsigned short) XINT (XCAR (XCDR (XCDR (rgblist))));
|
|
373
|
956 }
|
|
380
|
957
|
|
373
|
958 if (png_get_bKGD (png_ptr, info_ptr, &image_background))
|
|
|
959 png_set_background (png_ptr, image_background,
|
|
|
960 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
|
|
380
|
961 else
|
|
373
|
962 png_set_background (png_ptr, &my_background,
|
|
|
963 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
|
|
|
964 }
|
|
|
965
|
|
278
|
966 /* Now that we're using EImage, ask for 8bit RGB triples for any type
|
|
|
967 of image*/
|
|
380
|
968 /* convert palette images to full RGB */
|
|
278
|
969 if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
|
|
970 png_set_expand (png_ptr);
|
|
|
971 /* send grayscale images to RGB too */
|
|
|
972 if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY ||
|
|
|
973 info_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
|
|
|
974 png_set_gray_to_rgb (png_ptr);
|
|
|
975 /* we can't handle alpha values */
|
|
|
976 if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
|
|
|
977 png_set_strip_alpha (png_ptr);
|
|
|
978 /* tell libpng to strip 16 bit depth files down to 8 bits */
|
|
|
979 if (info_ptr->bit_depth == 16)
|
|
|
980 png_set_strip_16 (png_ptr);
|
|
|
981 /* if the image is < 8 bits, pad it out */
|
|
|
982 if (info_ptr->bit_depth < 8)
|
|
|
983 {
|
|
|
984 if (info_ptr->color_type == PNG_COLOR_TYPE_GRAY)
|
|
|
985 png_set_expand (png_ptr);
|
|
|
986 else
|
|
|
987 png_set_packing (png_ptr);
|
|
|
988 }
|
|
|
989
|
|
|
990 png_read_image (png_ptr, row_pointers);
|
|
|
991 png_read_end (png_ptr, info_ptr);
|
|
380
|
992
|
|
278
|
993 #ifdef PNG_SHOW_COMMENTS
|
|
|
994 /* ####
|
|
|
995 * I turn this off by default now, because the !%^@#!% comments
|
|
|
996 * show up every time the image is instantiated, which can get
|
|
|
997 * really really annoying. There should be some way to pass this
|
|
|
998 * type of data down into the glyph code, where you can get to it
|
|
|
999 * from lisp anyway. - WMP
|
|
|
1000 */
|
|
|
1001 {
|
|
|
1002 int i;
|
|
|
1003
|
|
|
1004 for (i = 0 ; i < info_ptr->num_text ; i++)
|
|
|
1005 {
|
|
|
1006 /* How paranoid do I have to be about no trailing NULLs, and
|
|
|
1007 using (int)info_ptr->text[i].text_length, and strncpy and a temp
|
|
|
1008 string somewhere? */
|
|
|
1009
|
|
|
1010 warn_when_safe (Qpng, Qinfo, "%s - %s",
|
|
|
1011 info_ptr->text[i].key,
|
|
|
1012 info_ptr->text[i].text);
|
|
|
1013 }
|
|
|
1014 }
|
|
|
1015 #endif
|
|
|
1016
|
|
|
1017 xfree (row_pointers);
|
|
|
1018 }
|
|
|
1019
|
|
|
1020 /* now instantiate */
|
|
408
|
1021 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain),
|
|
278
|
1022 init_image_instance_from_eimage,
|
|
398
|
1023 (ii, width, height, 1, unwind.eimage, dest_mask,
|
|
278
|
1024 instantiator, domain));
|
|
|
1025
|
|
|
1026 /* This will clean up everything else. */
|
|
|
1027 unbind_to (speccount, Qnil);
|
|
|
1028 }
|
|
|
1029
|
|
|
1030 #endif /* HAVE_PNG */
|
|
|
1031
|
|
|
1032
|
|
|
1033 #ifdef HAVE_TIFF
|
|
|
1034 #include "tiffio.h"
|
|
|
1035
|
|
|
1036 /**********************************************************************
|
|
|
1037 * TIFF *
|
|
|
1038 **********************************************************************/
|
|
|
1039 static void
|
|
|
1040 tiff_validate (Lisp_Object instantiator)
|
|
|
1041 {
|
|
|
1042 file_or_data_must_be_present (instantiator);
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 static Lisp_Object
|
|
|
1046 tiff_normalize (Lisp_Object inst, Lisp_Object console_type)
|
|
|
1047 {
|
|
|
1048 return simple_image_type_normalize (inst, console_type, Qtiff);
|
|
|
1049 }
|
|
|
1050
|
|
|
1051 static int
|
|
|
1052 tiff_possible_dest_types (void)
|
|
|
1053 {
|
|
|
1054 return IMAGE_COLOR_PIXMAP_MASK;
|
|
|
1055 }
|
|
|
1056
|
|
|
1057 struct tiff_unwind_data
|
|
|
1058 {
|
|
|
1059 unsigned char *eimage;
|
|
|
1060 /* Object that holds the decoded data from a TIFF file */
|
|
|
1061 TIFF *tiff;
|
|
|
1062 };
|
|
|
1063
|
|
|
1064 static Lisp_Object
|
|
|
1065 tiff_instantiate_unwind (Lisp_Object unwind_obj)
|
|
|
1066 {
|
|
|
1067 struct tiff_unwind_data *data =
|
|
|
1068 (struct tiff_unwind_data *) get_opaque_ptr (unwind_obj);
|
|
|
1069
|
|
|
1070 free_opaque_ptr (unwind_obj);
|
|
|
1071 if (data->tiff)
|
|
|
1072 {
|
|
|
1073 TIFFClose(data->tiff);
|
|
|
1074 }
|
|
|
1075 if (data->eimage)
|
|
|
1076 xfree (data->eimage);
|
|
|
1077
|
|
|
1078 return Qnil;
|
|
|
1079 }
|
|
|
1080
|
|
|
1081 typedef struct tiff_memory_storage
|
|
|
1082 {
|
|
|
1083 Extbyte *bytes; /* The data */
|
|
|
1084 Extcount len; /* How big is it? */
|
|
|
1085 int index; /* Where are we? */
|
|
|
1086 } tiff_memory_storage;
|
|
|
1087
|
|
|
1088 static size_t
|
|
|
1089 tiff_memory_read(thandle_t data, tdata_t buf, tsize_t size)
|
|
|
1090 {
|
|
|
1091 tiff_memory_storage *mem = (tiff_memory_storage*)data;
|
|
|
1092
|
|
|
1093 if (size > (mem->len - mem->index))
|
|
|
1094 return (size_t) -1;
|
|
|
1095 memcpy(buf, mem->bytes + mem->index, size);
|
|
|
1096 mem->index = mem->index + size;
|
|
|
1097 return size;
|
|
|
1098 }
|
|
|
1099
|
|
|
1100 static size_t tiff_memory_write(thandle_t data, tdata_t buf, tsize_t size)
|
|
|
1101 {
|
|
|
1102 abort();
|
|
|
1103 return 0; /* Shut up warnings. */
|
|
|
1104 }
|
|
|
1105
|
|
|
1106 static toff_t tiff_memory_seek(thandle_t data, toff_t off, int whence)
|
|
|
1107 {
|
|
|
1108 tiff_memory_storage *mem = (tiff_memory_storage*)data;
|
|
|
1109 int newidx;
|
|
|
1110 switch(whence) {
|
|
|
1111 case SEEK_SET:
|
|
|
1112 newidx = off;
|
|
|
1113 break;
|
|
|
1114 case SEEK_END:
|
|
|
1115 newidx = mem->len + off;
|
|
|
1116 break;
|
|
|
1117 case SEEK_CUR:
|
|
|
1118 newidx = mem->index + off;
|
|
|
1119 break;
|
|
|
1120 default:
|
|
|
1121 fprintf(stderr,"Eh? invalid seek mode in tiff_memory_seek\n");
|
|
|
1122 return -1;
|
|
|
1123 }
|
|
|
1124
|
|
|
1125 if ((newidx > mem->len) || (newidx < 0))
|
|
|
1126 return -1;
|
|
380
|
1127
|
|
278
|
1128 mem->index = newidx;
|
|
|
1129 return newidx;
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 static int
|
|
|
1133 tiff_memory_close(thandle_t data)
|
|
|
1134 {
|
|
|
1135 return 0;
|
|
|
1136 }
|
|
|
1137
|
|
|
1138 static int
|
|
|
1139 tiff_map_noop(thandle_t data, tdata_t* pbase, toff_t* psize)
|
|
|
1140 {
|
|
|
1141 return 0;
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 static void
|
|
|
1145 tiff_unmap_noop(thandle_t data, tdata_t pbase, toff_t psize)
|
|
|
1146 {
|
|
|
1147 return;
|
|
|
1148 }
|
|
|
1149
|
|
|
1150 static toff_t
|
|
|
1151 tiff_memory_size(thandle_t data)
|
|
|
1152 {
|
|
|
1153 tiff_memory_storage *mem = (tiff_memory_storage*)data;
|
|
|
1154 return mem->len;
|
|
|
1155 }
|
|
|
1156
|
|
|
1157 struct tiff_error_struct
|
|
|
1158 {
|
|
398
|
1159 #ifdef HAVE_VSNPRINTF
|
|
278
|
1160 char err_str[256];
|
|
|
1161 #else
|
|
|
1162 char err_str[1024]; /* return the error string */
|
|
|
1163 #endif
|
|
|
1164 jmp_buf setjmp_buffer; /* for return to caller */
|
|
|
1165 };
|
|
|
1166
|
|
|
1167 /* jh 98/03/12 - ###This struct for passing data to the error functions
|
|
|
1168 is an ugly hack caused by the fact that libtiff (as of v3.4) doesn't
|
|
|
1169 have any place to store error func data. This should be rectified
|
|
|
1170 before XEmacs gets threads! */
|
|
|
1171 static struct tiff_error_struct tiff_err_data;
|
|
|
1172
|
|
|
1173 static void
|
|
398
|
1174 tiff_error_func(const char *module, const char *fmt, ...)
|
|
278
|
1175 {
|
|
|
1176 va_list vargs;
|
|
|
1177
|
|
|
1178 va_start (vargs, fmt);
|
|
398
|
1179 #ifdef HAVE_VSNPRINTF
|
|
278
|
1180 vsnprintf (tiff_err_data.err_str, 255, fmt, vargs);
|
|
|
1181 #else
|
|
|
1182 /* pray this doesn't overflow... */
|
|
|
1183 vsprintf (tiff_err_data.err_str, fmt, vargs);
|
|
|
1184 #endif
|
|
|
1185 va_end (vargs);
|
|
|
1186 /* return to setjmp point */
|
|
|
1187 longjmp (tiff_err_data.setjmp_buffer, 1);
|
|
|
1188 }
|
|
|
1189
|
|
|
1190 static void
|
|
398
|
1191 tiff_warning_func(const char *module, const char *fmt, ...)
|
|
278
|
1192 {
|
|
|
1193 va_list vargs;
|
|
398
|
1194 #ifdef HAVE_VSNPRINTF
|
|
278
|
1195 char warn_str[256];
|
|
|
1196 #else
|
|
|
1197 char warn_str[1024];
|
|
|
1198 #endif
|
|
|
1199
|
|
|
1200 va_start (vargs, fmt);
|
|
398
|
1201 #ifdef HAVE_VSNPRINTF
|
|
278
|
1202 vsnprintf (warn_str, 255, fmt, vargs);
|
|
|
1203 #else
|
|
|
1204 vsprintf (warn_str, fmt, vargs);
|
|
|
1205 #endif
|
|
|
1206 va_end (vargs);
|
|
|
1207 warn_when_safe (Qtiff, Qinfo, "%s - %s",
|
|
|
1208 module, warn_str);
|
|
|
1209 }
|
|
|
1210
|
|
|
1211 static void
|
|
|
1212 tiff_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
|
|
|
1213 Lisp_Object pointer_fg, Lisp_Object pointer_bg,
|
|
|
1214 int dest_mask, Lisp_Object domain)
|
|
|
1215 {
|
|
398
|
1216 Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
|
|
278
|
1217 tiff_memory_storage mem_struct;
|
|
|
1218 /* It is OK for the unwind data to be local to this function,
|
|
|
1219 because the unwind-protect is always executed when this
|
|
|
1220 stack frame is still valid. */
|
|
|
1221 struct tiff_unwind_data unwind;
|
|
|
1222 int speccount = specpdl_depth ();
|
|
|
1223 uint32 width, height;
|
|
|
1224
|
|
|
1225 xzero (unwind);
|
|
|
1226 record_unwind_protect (tiff_instantiate_unwind, make_opaque_ptr (&unwind));
|
|
380
|
1227
|
|
278
|
1228 /* set up error facilities */
|
|
|
1229 if (setjmp (tiff_err_data.setjmp_buffer))
|
|
|
1230 {
|
|
|
1231 /* An error was signaled. No clean up is needed, as unwind handles that
|
|
|
1232 for us. Just pass the error along. */
|
|
|
1233 signal_image_error_2 ("TIFF decoding error",
|
|
|
1234 build_string(tiff_err_data.err_str),
|
|
|
1235 instantiator);
|
|
|
1236 }
|
|
|
1237 TIFFSetErrorHandler ((TIFFErrorHandler)tiff_error_func);
|
|
|
1238 TIFFSetWarningHandler ((TIFFErrorHandler)tiff_warning_func);
|
|
|
1239 {
|
|
|
1240 Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
|
|
|
1241 Extbyte *bytes;
|
|
|
1242 Extcount len;
|
|
|
1243
|
|
|
1244 uint32 *raster;
|
|
|
1245 unsigned char *ep;
|
|
|
1246
|
|
|
1247 assert (!NILP (data));
|
|
|
1248
|
|
|
1249 /* #### This is a definite problem under Mule due to the amount of
|
|
|
1250 stack data it might allocate. Think about Lstreams... */
|
|
398
|
1251 TO_EXTERNAL_FORMAT (LISP_STRING, data,
|
|
|
1252 ALLOCA, (bytes, len),
|
|
|
1253 Qbinary);
|
|
278
|
1254 mem_struct.bytes = bytes;
|
|
|
1255 mem_struct.len = len;
|
|
|
1256 mem_struct.index = 0;
|
|
|
1257
|
|
|
1258 unwind.tiff = TIFFClientOpen ("memfile", "r", &mem_struct,
|
|
|
1259 (TIFFReadWriteProc)tiff_memory_read,
|
|
|
1260 (TIFFReadWriteProc)tiff_memory_write,
|
|
|
1261 tiff_memory_seek, tiff_memory_close, tiff_memory_size,
|
|
|
1262 tiff_map_noop, tiff_unmap_noop);
|
|
|
1263 if (!unwind.tiff)
|
|
398
|
1264 signal_image_error ("Insufficient memory to instantiate TIFF image", instantiator);
|
|
278
|
1265
|
|
|
1266 TIFFGetField (unwind.tiff, TIFFTAG_IMAGEWIDTH, &width);
|
|
|
1267 TIFFGetField (unwind.tiff, TIFFTAG_IMAGELENGTH, &height);
|
|
|
1268 unwind.eimage = (unsigned char *) xmalloc (width * height * 3);
|
|
|
1269
|
|
398
|
1270 /* #### This is little more than proof-of-concept/function testing.
|
|
380
|
1271 It needs to be reimplemented via scanline reads for both memory
|
|
278
|
1272 compactness. */
|
|
|
1273 raster = (uint32*) _TIFFmalloc (width * height * sizeof (uint32));
|
|
|
1274 if (raster != NULL)
|
|
|
1275 {
|
|
|
1276 int i,j;
|
|
|
1277 uint32 *rp;
|
|
|
1278 ep = unwind.eimage;
|
|
|
1279 rp = raster;
|
|
|
1280 if (TIFFReadRGBAImage (unwind.tiff, width, height, raster, 0))
|
|
|
1281 {
|
|
|
1282 for (i = height - 1; i >= 0; i--)
|
|
|
1283 {
|
|
|
1284 /* This is to get around weirdness in the libtiff library where properly
|
|
|
1285 made TIFFs will come out upside down. libtiff bug or jhod-brainlock? */
|
|
|
1286 rp = raster + (i * width);
|
|
|
1287 for (j = 0; j < width; j++)
|
|
|
1288 {
|
|
|
1289 *ep++ = (unsigned char)TIFFGetR(*rp);
|
|
|
1290 *ep++ = (unsigned char)TIFFGetG(*rp);
|
|
|
1291 *ep++ = (unsigned char)TIFFGetB(*rp);
|
|
|
1292 rp++;
|
|
|
1293 }
|
|
|
1294 }
|
|
|
1295 }
|
|
|
1296 _TIFFfree (raster);
|
|
|
1297 } else
|
|
|
1298 signal_image_error ("Unable to allocate memory for TIFFReadRGBA", instantiator);
|
|
|
1299
|
|
|
1300 }
|
|
|
1301
|
|
|
1302 /* now instantiate */
|
|
408
|
1303 MAYBE_DEVMETH (DOMAIN_XDEVICE (ii->domain),
|
|
278
|
1304 init_image_instance_from_eimage,
|
|
398
|
1305 (ii, width, height, 1, unwind.eimage, dest_mask,
|
|
278
|
1306 instantiator, domain));
|
|
|
1307
|
|
|
1308 unbind_to (speccount, Qnil);
|
|
|
1309 }
|
|
|
1310
|
|
|
1311 #endif /* HAVE_TIFF */
|
|
|
1312
|
|
|
1313
|
|
|
1314 /************************************************************************/
|
|
|
1315 /* initialization */
|
|
|
1316 /************************************************************************/
|
|
|
1317
|
|
|
1318 void
|
|
280
|
1319 syms_of_glyphs_eimage (void)
|
|
278
|
1320 {
|
|
|
1321 }
|
|
|
1322
|
|
|
1323 void
|
|
280
|
1324 image_instantiator_format_create_glyphs_eimage (void)
|
|
278
|
1325 {
|
|
|
1326 /* image-instantiator types */
|
|
|
1327 #ifdef HAVE_JPEG
|
|
|
1328 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (jpeg, "jpeg");
|
|
|
1329
|
|
|
1330 IIFORMAT_HAS_METHOD (jpeg, validate);
|
|
|
1331 IIFORMAT_HAS_METHOD (jpeg, normalize);
|
|
|
1332 IIFORMAT_HAS_METHOD (jpeg, possible_dest_types);
|
|
|
1333 IIFORMAT_HAS_METHOD (jpeg, instantiate);
|
|
|
1334
|
|
|
1335 IIFORMAT_VALID_KEYWORD (jpeg, Q_data, check_valid_string);
|
|
|
1336 IIFORMAT_VALID_KEYWORD (jpeg, Q_file, check_valid_string);
|
|
|
1337 #endif
|
|
|
1338
|
|
|
1339 #ifdef HAVE_GIF
|
|
|
1340 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (gif, "gif");
|
|
|
1341
|
|
|
1342 IIFORMAT_HAS_METHOD (gif, validate);
|
|
|
1343 IIFORMAT_HAS_METHOD (gif, normalize);
|
|
|
1344 IIFORMAT_HAS_METHOD (gif, possible_dest_types);
|
|
|
1345 IIFORMAT_HAS_METHOD (gif, instantiate);
|
|
|
1346
|
|
|
1347 IIFORMAT_VALID_KEYWORD (gif, Q_data, check_valid_string);
|
|
|
1348 IIFORMAT_VALID_KEYWORD (gif, Q_file, check_valid_string);
|
|
|
1349 #endif
|
|
|
1350
|
|
|
1351 #ifdef HAVE_PNG
|
|
|
1352 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (png, "png");
|
|
|
1353
|
|
|
1354 IIFORMAT_HAS_METHOD (png, validate);
|
|
|
1355 IIFORMAT_HAS_METHOD (png, normalize);
|
|
|
1356 IIFORMAT_HAS_METHOD (png, possible_dest_types);
|
|
|
1357 IIFORMAT_HAS_METHOD (png, instantiate);
|
|
|
1358
|
|
|
1359 IIFORMAT_VALID_KEYWORD (png, Q_data, check_valid_string);
|
|
|
1360 IIFORMAT_VALID_KEYWORD (png, Q_file, check_valid_string);
|
|
|
1361 #endif
|
|
|
1362
|
|
|
1363 #ifdef HAVE_TIFF
|
|
|
1364 INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (tiff, "tiff");
|
|
|
1365
|
|
|
1366 IIFORMAT_HAS_METHOD (tiff, validate);
|
|
|
1367 IIFORMAT_HAS_METHOD (tiff, normalize);
|
|
|
1368 IIFORMAT_HAS_METHOD (tiff, possible_dest_types);
|
|
|
1369 IIFORMAT_HAS_METHOD (tiff, instantiate);
|
|
|
1370
|
|
|
1371 IIFORMAT_VALID_KEYWORD (tiff, Q_data, check_valid_string);
|
|
|
1372 IIFORMAT_VALID_KEYWORD (tiff, Q_file, check_valid_string);
|
|
|
1373 #endif
|
|
|
1374
|
|
|
1375 }
|
|
|
1376
|
|
|
1377 void
|
|
280
|
1378 vars_of_glyphs_eimage (void)
|
|
278
|
1379 {
|
|
|
1380 #ifdef HAVE_JPEG
|
|
|
1381 Fprovide (Qjpeg);
|
|
|
1382 #endif
|
|
|
1383
|
|
|
1384 #ifdef HAVE_GIF
|
|
|
1385 Fprovide (Qgif);
|
|
|
1386 #endif
|
|
|
1387
|
|
|
1388 #ifdef HAVE_PNG
|
|
|
1389 Fprovide (Qpng);
|
|
|
1390 #endif
|
|
|
1391
|
|
|
1392 #ifdef HAVE_TIFF
|
|
|
1393 Fprovide (Qtiff);
|
|
|
1394 #endif
|
|
|
1395
|
|
|
1396 }
|
