4 * A.k.a `Best web-album Of the world, Or your money back, Humerus'.
6 * The acronyn sucks, however this is a tribute to Dragon Ball by
7 * Akira Toriyama, where the last enemy beaten by heroes of Dragon
8 * Ball is named "Boo". But there was already a free software project
9 * called Boo, so this one will be it "Booh". Or whatever.
12 * Copyright (c) 2005-2008 Guillaume Cottenceau
14 * This software may be freely redistributed under the terms of the GNU
15 * public license version 2.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <exiv2/image.hpp>
26 #include <exiv2/exif.hpp>
28 #define GDK_PIXBUF_ENABLE_BACKEND
30 #include "rbgobject.h"
32 #define _SELF(s) GDK_PIXBUF(RVAL2GOBJ(s))
34 static VALUE whitebalance(VALUE self, VALUE level) {
35 double red_filter[256], blue_filter[256];
37 guchar* pixels = gdk_pixbuf_get_pixels(_SELF(self));
38 int rowstride = gdk_pixbuf_get_rowstride(_SELF(self));
40 double factor = 1 + fabs(NUM2DBL(level))/100;
41 if (NUM2DBL(level) < 0) {
45 for (i = 0; i < 256; i++) {
46 red_filter[i] = pow(((double)i)/255, 1/factor) * 255;
47 blue_filter[i] = pow(((double)i)/255, factor) * 255;
50 for (y = 0; y < gdk_pixbuf_get_height(_SELF(self)); y++) {
51 guchar* pixline = &(pixels[rowstride*y]);
52 for (x = 0; x < gdk_pixbuf_get_width(_SELF(self)); x++) {
53 pixline[x*3] = (guchar) red_filter[pixline[x*3]];
54 pixline[x*3+2] = (guchar) blue_filter[pixline[x*3+2]];
61 static VALUE gammacorrect(VALUE self, VALUE level) {
64 guchar* pixels = gdk_pixbuf_get_pixels(_SELF(self));
65 int rowstride = gdk_pixbuf_get_rowstride(_SELF(self));
67 double factor = 1 + fabs(NUM2DBL(level))/100;
68 if (NUM2DBL(level) > 0) {
72 for (i = 0; i < 256; i++) {
73 filter[i] = pow(((double)i)/255, factor) * 255;
76 for (y = 0; y < gdk_pixbuf_get_height(_SELF(self)); y++) {
77 guchar* pixline = &(pixels[rowstride*y]);
78 for (x = 0; x < gdk_pixbuf_get_width(_SELF(self)); x++) {
79 pixline[x*3] = (guchar) filter[pixline[x*3]];
80 pixline[x*3+1] = (guchar) filter[pixline[x*3+1]];
81 pixline[x*3+2] = (guchar) filter[pixline[x*3+2]];
88 static VALUE exif_orientation(VALUE module, VALUE filename) {
90 Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(StringValuePtr(filename));
91 image->readMetadata();
92 Exiv2::ExifData &exifData = image->exifData();
93 if (exifData.empty()) {
96 Exiv2::ExifData::const_iterator i = exifData.findKey(Exiv2::ExifKey("Exif.Image.Orientation"));
97 if (i != exifData.end()) {
98 return INT2NUM(i->value().toLong());
101 } catch (Exiv2::AnyError& e) {
102 // actually, I don't care about exceptions because I will try non JPG images
103 // std::cerr << "Caught Exiv2 exception: " << e << "\n";
108 static VALUE exif_set_orientation(VALUE module, VALUE filename, VALUE val) {
110 Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(StringValuePtr(filename));
111 image->readMetadata();
112 Exiv2::ExifData &exifData = image->exifData();
113 exifData["Exif.Image.Orientation"] = uint16_t(NUM2INT(val));
114 image->writeMetadata();
115 } catch (Exiv2::AnyError& e) {
116 // actually, I don't care about exceptions because I will try non JPG images
117 // std::cout << "Caught Exiv2 exception: " << e << "\n";
122 static VALUE exif_datetimeoriginal(VALUE module, VALUE filename) {
124 Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(StringValuePtr(filename));
125 image->readMetadata();
126 Exiv2::ExifData &exifData = image->exifData();
127 if (exifData.empty()) {
130 Exiv2::ExifData::const_iterator i = exifData.findKey(Exiv2::ExifKey("Exif.Photo.DateTimeOriginal"));
131 if (i != exifData.end()) {
132 return rb_str_new2(i->value().toString().c_str());
135 } catch (Exiv2::AnyError& e) {
136 std::cout << "Caught Exiv2 exception: " << e << "\n";
141 // internalize drawing "video" borders, it is too slow in ruby (0.12 secs on my p4 2.8 GHz, whereas it's barely measurable with this implementation)
142 static VALUE draw_borders(VALUE self, VALUE pixbuf, VALUE x1, VALUE x2, VALUE ystart, VALUE yend) {
143 GdkDrawable* drawable = GDK_DRAWABLE(RVAL2GOBJ(self));
144 int y = NUM2INT(ystart);
145 int yend_ = NUM2INT(yend);
146 GdkPixbuf* pb = GDK_PIXBUF(RVAL2GOBJ(pixbuf));
147 int height = gdk_pixbuf_get_height(pb);
149 int render_height = MIN(height, yend_ - y);
150 gdk_draw_pixbuf(drawable, NULL, pb, 0, 0, NUM2INT(x1), y, -1, render_height, GDK_RGB_DITHER_NONE, -1, -1);
151 gdk_draw_pixbuf(drawable, NULL, pb, 0, 0, NUM2INT(x2), y, -1, render_height, GDK_RGB_DITHER_NONE, -1, -1);
157 // internalize memory leak fix for GdkPixbuf.rotate
158 // (bugged as of rg2 0.16.0)
159 static VALUE rotate_noleak(VALUE self, VALUE angle) {
161 GdkPixbuf* dest = gdk_pixbuf_rotate_simple(_SELF(self), (GdkPixbufRotation) RVAL2GENUM(angle, GDK_TYPE_PIXBUF_ROTATION));
164 ret = GOBJ2RVAL(dest);
165 g_object_unref(dest);
169 // internalize allowing to pass Qnil to RVAL2BOXED to have NULL passed to Gtk
170 // (bugged as of rg2 0.16.0)
171 static VALUE modify_bg(VALUE self, VALUE state, VALUE color) {
172 gtk_widget_modify_bg(GTK_WIDGET(RVAL2GOBJ(self)), (GtkStateType) RVAL2GENUM(state, GTK_TYPE_STATE_TYPE),
173 NIL_P(color) ? NULL : (GdkColor*) RVAL2BOXED(color, GDK_TYPE_COLOR));
177 // internalize pixbuf loading for 30% more speedup
178 static VALUE load_not_freezing_ui(VALUE self, VALUE path, VALUE interruptable, VALUE area_prepared_signal_id) {
179 int interruptable_ = RTEST(interruptable);
182 GdkPixbufLoader* loader = GDK_PIXBUF_LOADER(RVAL2GOBJ(self));
183 GError* error = NULL;
184 FILE* f = fopen(RVAL2CSTR(path), "r");
185 while ((amount = fread(buf, 1, 65536, f)) > 0) {
186 if (!gdk_pixbuf_loader_write(loader, (const guchar*) buf, amount, &error)) {
190 while (gtk_events_pending()) {
191 gtk_main_iteration();
193 if (interruptable_ && RTEST(rb_eval_string("$interrupt_loading"))) {
194 // interrupted, case when the user clicked/keyboarded too quickly for this image to
195 // display; we cancel this loading, but before we disconnect the area-prepared
196 // signal handler, else the call to gdk_pixbuf_loader_get_pixbuf will take ages
197 // (between 100 and 400 ms on my p4 for a large photo!)
198 g_signal_handler_disconnect(loader, NUM2INT(area_prepared_signal_id));
199 gdk_pixbuf_loader_close(loader, NULL);
212 RGObjClassInfo* cinfo = (RGObjClassInfo*)rbgobj_lookup_class_by_gtype(GDK_TYPE_PIXBUF, Qnil);
213 rb_define_method(cinfo->klass, "whitebalance!", (VALUE (*)(...)) whitebalance, 1);
214 rb_define_method(cinfo->klass, "gammacorrect!", (VALUE (*)(...)) gammacorrect, 1);
215 rb_define_method(cinfo->klass, "rotate", (VALUE (*)(...)) rotate_noleak, 1);
217 cinfo = (RGObjClassInfo*)rbgobj_lookup_class_by_gtype(GDK_TYPE_DRAWABLE, Qnil);
218 rb_define_method(cinfo->klass, "draw_borders", (VALUE (*)(...)) draw_borders, 5);
220 cinfo = (RGObjClassInfo*)rbgobj_lookup_class_by_gtype(GTK_TYPE_WIDGET, Qnil);
221 rb_define_method(cinfo->klass, "modify_bg", (VALUE (*)(...)) modify_bg, 2);
223 cinfo = (RGObjClassInfo*)rbgobj_lookup_class_by_gtype(GDK_TYPE_PIXBUF_LOADER, Qnil);
224 rb_define_method(cinfo->klass, "load_not_freezing_ui", (VALUE (*)(...)) load_not_freezing_ui, 3);
226 VALUE exif = rb_define_module("Exif");
227 rb_define_module_function(exif, "orientation", (VALUE (*)(...)) exif_orientation, 1);
228 rb_define_module_function(exif, "set_orientation", (VALUE (*)(...)) exif_set_orientation, 2);
229 rb_define_module_function(exif, "datetimeoriginal", (VALUE (*)(...)) exif_datetimeoriginal, 1);