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Merge with upstream/master.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 14 May 2019 11:46:50 +0300
parents 43b8d416a674
children
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1 /*
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2 * Copyright (C) 2004 John Ellis
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3 * Copyright (C) 2008 - 2016 The Geeqie Team
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4 *
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5 * Author: John Ellis
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6 *
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7 * This program is free software; you can redistribute it and/or modify
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8 * it under the terms of the GNU General Public License as published by
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9 * the Free Software Foundation; either version 2 of the License, or
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10 * (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 * GNU General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU General Public License along
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18 * with this program; if not, write to the Free Software Foundation, Inc.,
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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20 */
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21
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22 #ifndef IMAGE_LOAD_H
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23 #define IMAGE_LOAD_H
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24
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25 #define TYPE_IMAGE_LOADER (image_loader_get_type())
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27 typedef void (*ImageLoaderBackendCbAreaPrepared)(gpointer loader, gpointer data);
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28 typedef void (*ImageLoaderBackendCbSize)(gpointer loader, gint width, gint height, gpointer data);
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29 typedef void (*ImageLoaderBackendCbAreaUpdated)(gpointer loader, guint x, guint y, guint w, guint h, gpointer data);
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30
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31 typedef gpointer (*ImageLoaderBackendFuncLoaderNew)(ImageLoaderBackendCbAreaUpdated, ImageLoaderBackendCbSize, ImageLoaderBackendCbAreaPrepared, gpointer data);
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32 typedef void (*ImageLoaderBackendFuncSetSize)(gpointer loader, int width, int height);
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33 typedef gboolean (*ImageLoaderBackendFuncLoad)(gpointer loader, const guchar *buf, gsize count, GError **error); /* optional, load whole image at once */
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34 typedef gboolean (*ImageLoaderBackendFuncWrite)(gpointer loader, const guchar *buf, gsize count, GError **error);
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35 typedef GdkPixbuf* (*ImageLoaderBackendFuncGetPixbuf)(gpointer loader);
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36 typedef gboolean (*ImageLoaderBackendFuncClose)(gpointer loader, GError **error);
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37 typedef void (*ImageLoaderBackendFuncAbort)(gpointer loader);
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38 typedef void (*ImageLoaderBackendFuncFree)(gpointer loader);
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39 typedef gchar* (*ImageLoaderBackendFuncGetFormatName)(gpointer loader);
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40 typedef gchar** (*ImageLoaderBackendFuncGetFormatMimeTypes)(gpointer loader);
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41
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42 typedef struct _ImageLoaderBackend ImageLoaderBackend;
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43 struct _ImageLoaderBackend
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44 {
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45 ImageLoaderBackendFuncLoaderNew loader_new;
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46 ImageLoaderBackendFuncSetSize set_size;
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47 ImageLoaderBackendFuncLoad load;
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48 ImageLoaderBackendFuncWrite write;
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49 ImageLoaderBackendFuncGetPixbuf get_pixbuf;
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50 ImageLoaderBackendFuncClose close;
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51 ImageLoaderBackendFuncAbort abort;
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52 ImageLoaderBackendFuncFree free;
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53 ImageLoaderBackendFuncGetFormatName get_format_name;
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54 ImageLoaderBackendFuncGetFormatMimeTypes get_format_mime_types;
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55 };
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56
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57
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58 //typedef struct _ImageLoader ImageLoader;
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59 typedef struct _ImageLoaderClass ImageLoaderClass;
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60
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61 struct _ImageLoader
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62 {
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63 GObject parent;
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64
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65 /*< private >*/
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66 GdkPixbuf *pixbuf;
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67 FileData *fd;
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68 gchar *path;
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69
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70 gsize bytes_read;
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71 gsize bytes_total;
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72
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73 gboolean preview;
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74
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75 gint requested_width;
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76 gint requested_height;
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77
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78 gint actual_width;
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79 gint actual_height;
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80
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81 gboolean shrunk;
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82
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83 gboolean done;
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84 guint idle_id; /* event source id */
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85 gint idle_priority;
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86
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87 gpointer *loader;
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88 GError *error;
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89 ImageLoaderBackend backend;
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90
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91 guint idle_done_id; /* event source id */
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92 GList *area_param_list;
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93 GList *area_param_delayed_list;
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94
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95 gboolean delay_area_ready;
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96
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97 GMutex *data_mutex;
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98 gboolean stopping;
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99 gboolean can_destroy;
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100 GCond *can_destroy_cond;
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101 gboolean thread;
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102
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103 guchar *mapped_file;
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104 gsize read_buffer_size;
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105 guint idle_read_loop_count;
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106 };
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107
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108 struct _ImageLoaderClass {
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109 GObjectClass parent;
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110
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111 /* class members */
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112 void (*area_ready)(ImageLoader *, guint x, guint y, guint w, guint h, gpointer);
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113 void (*error)(ImageLoader *, gpointer);
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114 void (*done)(ImageLoader *, gpointer);
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115 void (*percent)(ImageLoader *, gdouble, gpointer);
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116 };
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117
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118 GType image_loader_get_type(void);
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119
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120 ImageLoader *image_loader_new(FileData *fd);
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121
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122 void image_loader_free(ImageLoader *il);
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123
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124 /* delay area_ready signals */
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125 void image_loader_delay_area_ready(ImageLoader *il, gboolean enable);
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126
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127 /* Speed up loading when you only need at most width x height size image,
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128 * only the jpeg GdkPixbuf loader benefits from it - so there is no
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129 * guarantee that the image will scale down to the requested size..
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130 */
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131 void image_loader_set_requested_size(ImageLoader *il, gint width, gint height);
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132
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133 void image_loader_set_buffer_size(ImageLoader *il, guint size);
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134
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135 /* this only has effect if used before image_loader_start()
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136 * default is G_PRIORITY_DEFAULT_IDLE
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137 */
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138 void image_loader_set_priority(ImageLoader *il, gint priority);
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139
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140 gboolean image_loader_start(ImageLoader *il);
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141
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142
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143 GdkPixbuf *image_loader_get_pixbuf(ImageLoader *il);
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144 gdouble image_loader_get_percent(ImageLoader *il);
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145 gboolean image_loader_get_is_done(ImageLoader *il);
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146 FileData *image_loader_get_fd(ImageLoader *il);
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147 gboolean image_loader_get_shrunk(ImageLoader *il);
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148 const gchar *image_loader_get_error(ImageLoader *il);
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149
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150 gboolean image_load_dimensions(FileData *fd, gint *width, gint *height);
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151
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152 #endif
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153 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */