comparison: libpurple/purplegdkpixbuf.c
libpurple/purplegdkpixbuf.c
- changeset 41319
- 04d027ed3d63
- parent 41144
- 910bdda75c74
- child 42182
- 3fc2d2b7b7a8
equal
deleted
inserted
replaced
| 41318:56092ffeae95 | 41319:04d027ed3d63 |
|---|---|
| 1 /* | |
| 2 * Purple - Internet Messaging Library | |
| 3 * Copyright (C) Pidgin Developers <devel@pidgin.im> | |
| 4 * | |
| 5 * Purple is the legal property of its developers, whose names are too numerous | |
| 6 * to list here. Please refer to the COPYRIGHT file distributed with this | |
| 7 * source distribution. | |
| 8 * | |
| 9 * This program is free software; you can redistribute it and/or modify | |
| 10 * it under the terms of the GNU General Public License as published by | |
| 11 * the Free Software Foundation; either version 2 of the License, or | |
| 12 * (at your option) any later version. | |
| 13 * | |
| 14 * This program is distributed in the hope that it will be useful, | |
| 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 17 * GNU General Public License for more details. | |
| 18 * | |
| 19 * You should have received a copy of the GNU General Public License | |
| 20 * along with this program; if not, see <https://www.gnu.org/licenses/>. | |
| 21 */ | |
| 22 | |
| 23 #include "libpurple/purplegdkpixbuf.h" | |
| 24 | |
| 25 #include "debug.h" | |
| 26 | |
| 27 void purple_gdk_pixbuf_make_round(GdkPixbuf *pixbuf) { | |
| 28 gint width, height, rowstride; | |
| 29 guchar *pixels; | |
| 30 | |
| 31 if (!gdk_pixbuf_get_has_alpha(pixbuf)) { | |
| 32 return; | |
| 33 } | |
| 34 | |
| 35 width = gdk_pixbuf_get_width(pixbuf); | |
| 36 height = gdk_pixbuf_get_height(pixbuf); | |
| 37 rowstride = gdk_pixbuf_get_rowstride(pixbuf); | |
| 38 pixels = gdk_pixbuf_get_pixels(pixbuf); | |
| 39 | |
| 40 if (width < 6 || height < 6) { | |
| 41 return; | |
| 42 } | |
| 43 | |
| 44 /* The following code will convert the alpha of the pixel data in all | |
| 45 * corners to look something like the following diagram. | |
| 46 * | |
| 47 * 00 80 c0 FF FF c0 80 00 | |
| 48 * 80 FF FF FF FF FF FF 80 | |
| 49 * c0 FF FF FF FF FF FF c0 | |
| 50 * FF FF FF FF FF FF FF FF | |
| 51 * FF FF FF FF FF FF FF FF | |
| 52 * c0 FF FF FF FF FF FF c0 | |
| 53 * 80 FF FF FF FF FF FF 80 | |
| 54 * 00 80 c0 FF FF c0 80 00 | |
| 55 */ | |
| 56 | |
| 57 /* Top left */ | |
| 58 pixels[3] = 0; | |
| 59 pixels[7] = 0x80; | |
| 60 pixels[11] = 0xC0; | |
| 61 pixels[rowstride + 3] = 0x80; | |
| 62 pixels[rowstride * 2 + 3] = 0xC0; | |
| 63 | |
| 64 /* Top right */ | |
| 65 pixels[width * 4 - 1] = 0; | |
| 66 pixels[width * 4 - 5] = 0x80; | |
| 67 pixels[width * 4 - 9] = 0xC0; | |
| 68 pixels[rowstride + (width * 4) - 1] = 0x80; | |
| 69 pixels[(2 * rowstride) + (width * 4) - 1] = 0xC0; | |
| 70 | |
| 71 /* Bottom left */ | |
| 72 pixels[(height - 1) * rowstride + 3] = 0; | |
| 73 pixels[(height - 1) * rowstride + 7] = 0x80; | |
| 74 pixels[(height - 1) * rowstride + 11] = 0xC0; | |
| 75 pixels[(height - 2) * rowstride + 3] = 0x80; | |
| 76 pixels[(height - 3) * rowstride + 3] = 0xC0; | |
| 77 | |
| 78 /* Bottom right */ | |
| 79 pixels[height * rowstride - 1] = 0; | |
| 80 pixels[(height - 1) * rowstride - 1] = 0x80; | |
| 81 pixels[(height - 2) * rowstride - 1] = 0xC0; | |
| 82 pixels[height * rowstride - 5] = 0x80; | |
| 83 pixels[height * rowstride - 9] = 0xC0; | |
| 84 } | |
| 85 | |
| 86 gboolean | |
| 87 purple_gdk_pixbuf_is_opaque(GdkPixbuf *pixbuf) { | |
| 88 gint height, rowstride, i; | |
| 89 guchar *pixels; | |
| 90 guchar *row; | |
| 91 | |
| 92 if (!gdk_pixbuf_get_has_alpha(pixbuf)) { | |
| 93 return TRUE; | |
| 94 } | |
| 95 | |
| 96 height = gdk_pixbuf_get_height (pixbuf); | |
| 97 rowstride = gdk_pixbuf_get_rowstride (pixbuf); | |
| 98 pixels = gdk_pixbuf_get_pixels (pixbuf); | |
| 99 | |
| 100 /* check the top row */ | |
| 101 row = pixels; | |
| 102 for (i = 3; i < rowstride; i+=4) { | |
| 103 if (row[i] < 0xfe) { | |
| 104 return FALSE; | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 /* check the left and right sides */ | |
| 109 for (i = 1; i < height - 1; i++) { | |
| 110 row = pixels + (i * rowstride); | |
| 111 if (row[3] < 0xfe || row[rowstride - 1] < 0xfe) { | |
| 112 return FALSE; | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 /* check the bottom */ | |
| 117 row = pixels + ((height - 1) * rowstride); | |
| 118 for (i = 3; i < rowstride; i += 4) { | |
| 119 if (row[i] < 0xfe) { | |
| 120 return FALSE; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 return TRUE; | |
| 125 } | |
| 126 | |
| 127 static GObject *purple_gdk_pixbuf_from_data_helper(const guchar *buf, gsize count, gboolean animated) | |
| 128 { | |
| 129 GObject *pixbuf; | |
| 130 GdkPixbufLoader *loader; | |
| 131 GError *error = NULL; | |
| 132 | |
| 133 loader = gdk_pixbuf_loader_new(); | |
| 134 | |
| 135 if (!gdk_pixbuf_loader_write(loader, buf, count, &error) || error) { | |
| 136 purple_debug_warning("gtkutils", "gdk_pixbuf_loader_write() " | |
| 137 "failed with size=%" G_GSIZE_FORMAT ": %s\n", count, | |
| 138 error ? error->message : "(no error message)"); | |
| 139 if (error) | |
| 140 g_error_free(error); | |
| 141 g_object_unref(G_OBJECT(loader)); | |
| 142 return NULL; | |
| 143 } | |
| 144 | |
| 145 if (!gdk_pixbuf_loader_close(loader, &error) || error) { | |
| 146 purple_debug_warning("gtkutils", "gdk_pixbuf_loader_close() " | |
| 147 "failed for image of size %" G_GSIZE_FORMAT ": %s\n", count, | |
| 148 error ? error->message : "(no error message)"); | |
| 149 if (error) | |
| 150 g_error_free(error); | |
| 151 g_object_unref(G_OBJECT(loader)); | |
| 152 return NULL; | |
| 153 } | |
| 154 | |
| 155 if (animated) | |
| 156 pixbuf = G_OBJECT(gdk_pixbuf_loader_get_animation(loader)); | |
| 157 else | |
| 158 pixbuf = G_OBJECT(gdk_pixbuf_loader_get_pixbuf(loader)); | |
| 159 if (!pixbuf) { | |
| 160 purple_debug_warning("gtkutils", "%s() returned NULL for image " | |
| 161 "of size %" G_GSIZE_FORMAT "\n", | |
| 162 animated ? "gdk_pixbuf_loader_get_animation" | |
| 163 : "gdk_pixbuf_loader_get_pixbuf", count); | |
| 164 g_object_unref(G_OBJECT(loader)); | |
| 165 return NULL; | |
| 166 } | |
| 167 | |
| 168 g_object_ref(pixbuf); | |
| 169 g_object_unref(G_OBJECT(loader)); | |
| 170 | |
| 171 return pixbuf; | |
| 172 } | |
| 173 | |
| 174 GdkPixbuf *purple_gdk_pixbuf_from_data(const guchar *buf, gsize count) | |
| 175 { | |
| 176 return GDK_PIXBUF(purple_gdk_pixbuf_from_data_helper(buf, count, FALSE)); | |
| 177 } | |
| 178 | |
| 179 GdkPixbuf * | |
| 180 purple_gdk_pixbuf_from_image(PurpleImage *image) | |
| 181 { | |
| 182 return purple_gdk_pixbuf_from_data(purple_image_get_data(image), | |
| 183 purple_image_get_data_size(image)); | |
| 184 } | |
| 185 | |
| 186 GdkPixbuf *purple_gdk_pixbuf_new_from_file(const gchar *filename) | |
| 187 { | |
| 188 GdkPixbuf *pixbuf; | |
| 189 GError *error = NULL; | |
| 190 | |
| 191 g_return_val_if_fail(filename != NULL, NULL); | |
| 192 g_return_val_if_fail(filename[0] != '\0', NULL); | |
| 193 | |
| 194 pixbuf = gdk_pixbuf_new_from_file(filename, &error); | |
| 195 if (!pixbuf || error) { | |
| 196 purple_debug_warning("gtkutils", "gdk_pixbuf_new_from_file() " | |
| 197 "returned %s for file %s: %s\n", | |
| 198 pixbuf ? "something" : "nothing", | |
| 199 filename, | |
| 200 error ? error->message : "(no error message)"); | |
| 201 if (error) | |
| 202 g_error_free(error); | |
| 203 if (pixbuf) | |
| 204 g_object_unref(G_OBJECT(pixbuf)); | |
| 205 return NULL; | |
| 206 } | |
| 207 | |
| 208 return pixbuf; | |
| 209 } | |
| 210 | |
| 211 GdkPixbuf *purple_gdk_pixbuf_new_from_file_at_size(const char *filename, int width, int height) | |
| 212 { | |
| 213 GdkPixbuf *pixbuf; | |
| 214 GError *error = NULL; | |
| 215 | |
| 216 g_return_val_if_fail(filename != NULL, NULL); | |
| 217 g_return_val_if_fail(filename[0] != '\0', NULL); | |
| 218 | |
| 219 pixbuf = gdk_pixbuf_new_from_file_at_size(filename, | |
| 220 width, height, &error); | |
| 221 if (!pixbuf || error) { | |
| 222 purple_debug_warning("gtkutils", "gdk_pixbuf_new_from_file_at_size() " | |
| 223 "returned %s for file %s: %s\n", | |
| 224 pixbuf ? "something" : "nothing", | |
| 225 filename, | |
| 226 error ? error->message : "(no error message)"); | |
| 227 if (error) | |
| 228 g_error_free(error); | |
| 229 if (pixbuf) | |
| 230 g_object_unref(G_OBJECT(pixbuf)); | |
| 231 return NULL; | |
| 232 } | |
| 233 | |
| 234 return pixbuf; | |
| 235 } |
