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