g-free ( pixbuf ) ?

**Rniamo** · 03/07/2007, 18h26

bonjour j'ai développé une petite application de "traitement" de l'image et j'ai quelques soucis :

1) j'utilise des pixbuf....mais je ne les libère jamais faute de connaissances (d'où mon titre), comment faire?

2) ça concerne moins le gtk mais j'aimerais "séparer" ma source en 4 fichiers et je ne vois pas comment faire. On m'a parler de makefile mais je ne sais pas comment gérer les variables de compilation, y a -t- il un bon tuto qui traine (accessible surtout).

PS : si je ne répond pas vite c'est parce que je n'ai pas le net chez moi.

**Franck.H** · 03/07/2007, 18h29

Salut !

Pour ta question concernant les GdkPixbuf, tu dois utiliser g_object_unref pour libérer les images de types GdkPixbuf et GdkPixmap !

**Rniamo** · 04/07/2007, 09h09

merci beaucoup!!

**Acivurt** · 29/07/2007, 10h32

Petite question sur g_object_unref :
Est-ce utile de libérer la mémoire d'un pixbuf déclaré dans une fonction, ou c'est fait automatiquement quand elle se termine ?

**Franck.H** · 29/07/2007, 10h40

Salut, avec quoi le pixbuf est-il créé/initialisé ? Cela peut dépendre je pense mais avec les fonctions comme gdk_pixbuf_new_from_file, il est précisé:

A newly-created pixbuf with a reference count of 1, ...

Je ne suis pas un spécialiste de cette partie de la lib je dois avouer mais j'en conclu qu'il est préférable dans ce cas d'utiliser la fonction g_object_unref pour faire tomber le nombre de références à 0 ce qui permettra à la bibliothèque de libérer elle-même l'objet

**Acivurt** · 29/07/2007, 10h49

Envoyé par Franck.H

Salut, avec quoi le pixbuf est-il créé/initialisé ? Cela peut dépendre je pense mais avec les fonctions comme gdk_pixbuf_new_from_file, il est précisé:

Je ne suis pas un spécialiste de cette partie de la lib je dois avouer mais j'en conclu qu'il est préférable dans ce cas d'utiliser la fonction g_object_unref pour faire tomber le nombre de références à 0 ce qui permettra à la bibliothèque de libérer elle-même l'objet

En fait souvent pour le travail sur l'image ou récupération d'info (seuillage, récup de valeurs de pixels etc ...), je travail dans ma fonction avec une copie du pixbuf ( gdk_pixbuf_copy() ) histoire que le pixbuf d'origine (affiché à l'écran), ne soit pas modifié.
Jvais refaire un tour du coté du site de l'API ...

Autre question, dans ma fonction je récupère un pixbuf par argument, et je le fait pointer vers un autre pixbuf. Est ce que la mémoire de l'ancien pixbuf, (qui n'est donc plus pointé par rien) est vidé ou faut il le faire (comme le garbage collector en java)

**Acivurt** · 29/07/2007, 16h20

Ahh OK !
Je pense cette fois avoir un rapport ... mais après c'est pas super "compréhensible", je vois des adresses, ma fonction, mais j'ai du mal à trier ...
Je vais y jeter un oeil plus attentif ce soir.

Voilà la fin du code à titre indicatif, si vous trouver qqchose de bizarre

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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==15440== 
==15440== 
==15440== 4,800 bytes in 30 blocks are still reachable in loss record 138 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x74E9961: XCreateGC (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x568D288: _gdk_x11_gc_new (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x51AC2AB: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x7E33CCF: g_cache_insert (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x51AC6F4: gtk_gc_get (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x525D03F: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED84C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EEA12: g_signal_emit (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x5255337: gtk_style_attach (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440== 
==15440== 
==15440== 4,956 bytes in 206 blocks are still reachable in loss record 139 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x7512D55: (within /usr/lib/libX11.so.6.2.0)
==15440==    by 0x75139AA: (within /usr/lib/libX11.so.6.2.0)
==15440==    by 0x7513E07: XrmGetStringDatabase (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x74F069F: XGetDefault (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x6BFF0C3: _XcursorGetDisplayInfo (in /usr/lib/libXcursor.so.1.0.2)
==15440==    by 0x6BFF178: XcursorGetTheme (in /usr/lib/libXcursor.so.1.0.2)
==15440==    by 0x567DAC7: gdk_x11_display_set_cursor_theme (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x524415C: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x524468D: gtk_settings_get_for_screen (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x525C748: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77FCC5F: g_type_create_instance (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 5,088 bytes in 159 blocks are still reachable in loss record 140 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x61B992D: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BA474: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB824: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x90FE277: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FEF63: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FFFC8: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x910103A: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90F8180: XML_ParseBuffer (in /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x61BACB7: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BAF3F: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB023: (within /usr/lib/libfontconfig.so.1.2.0)
==15440== 
==15440== 
==15440== 5,344 bytes in 167 blocks are still reachable in loss record 141 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x61B9539: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BA194: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB814: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x90FE277: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FEF63: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FFFC8: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x910103A: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90F8180: XML_ParseBuffer (in /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x61BACB7: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BAF3F: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB023: (within /usr/lib/libfontconfig.so.1.2.0)
==15440== 
==15440== 
==15440== 5,421 bytes in 385 blocks are still reachable in loss record 142 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x61B87D3: FcStrCopy (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61B8818: FcStrSetAdd (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BAB9B: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BAF3F: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB023: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB45B: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x90FE277: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FEF63: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FFFC8: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x910103A: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90F8180: XML_ParseBuffer (in /usr/lib/libexpat.so.1.0.0)
==15440== 
==15440== 
==15440== 6,792 bytes in 1 blocks are still reachable in loss record 143 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x74FCF3E: XOpenDisplay (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x567EF18: gdk_display_open (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x565E77C: gdk_display_open_default_libgtk_only (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x51E64E3: gtk_init_check (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x51E6508: gtk_init (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x402827: main (in /home/mlallema/detection)
==15440== 
==15440== 
==15440== 7,080 bytes in 59 blocks are still reachable in loss record 144 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x72677BC: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x7268486: cairo_scaled_font_glyph_extents (in /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x5F99AA0: (within /usr/lib/libpangocairo-1.0.so.0.1600.2)
==15440==    by 0x8A438A9: pango_ot_buffer_output (in /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0xB308B66: (within /usr/lib/pango/1.6.0/modules/pango-basic-fc.so)
==15440==    by 0x703121D: pango_shape (in /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702524B: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x7027A8D: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x7027FB4: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702887C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x51D8A52: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440== 
==15440== 
==15440== 7,728 bytes in 46 blocks are still reachable in loss record 145 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x72966D4: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x72969CA: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x7260F3D: cairo_image_surface_create_for_data (in /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x72742F5: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x727695A: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x7267762: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x7289F36: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x726B0F6: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x725DDB7: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x72579D9: cairo_show_glyphs (in /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x5F992F5: (within /usr/lib/libpangocairo-1.0.so.0.1600.2)
==15440== 
==15440== 
==15440== 8,424 bytes in 351 blocks are still reachable in loss record 146 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x61B9AFA: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB2C9: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x90FE277: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FEF63: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90FFFC8: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x910103A: (within /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x90F8180: XML_ParseBuffer (in /usr/lib/libexpat.so.1.0.0)
==15440==    by 0x61BACB7: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BAF3F: FcConfigParseAndLoad (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB023: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61BB45B: (within /usr/lib/libfontconfig.so.1.2.0)
==15440== 
==15440== 
==15440== 8,544 bytes in 407 blocks are still reachable in loss record 147 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x4C20AE3: realloc (vg_replace_malloc.c:306)
==15440==    by 0x7E507F0: g_realloc (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x77F94FA: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77FD32F: g_type_register_static (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77FD4C7: g_type_register_static_simple (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x512D89A: gtk_button_get_type (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x512E008: gtk_button_new_with_label (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x402F0A: main (in /home/mlallema/detection)
==15440== 
==15440== 
==15440== 9,743 bytes in 238 blocks are still reachable in loss record 148 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x61B5C01: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61B6AED: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61B3A65: FcFontRenderPrepare (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x8A40E6E: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x702041C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702077C: pango_itemize_with_base_dir (in /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x7027CD2: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702887C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x51D8A52: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x511C52D: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD897: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 12,144 bytes in 46 blocks are still reachable in loss record 149 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x7260DE2: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x72742F5: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x727695A: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x7267762: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x7289F36: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x726B0F6: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x725DDB7: (within /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x72579D9: cairo_show_glyphs (in /usr/lib/libcairo.so.2.11.1)
==15440==    by 0x5F992F5: (within /usr/lib/libpangocairo-1.0.so.0.1600.2)
==15440==    by 0x702D4FD: pango_renderer_draw_glyphs (in /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x5F988D7: (within /usr/lib/libpangocairo-1.0.so.0.1600.2)
==15440== 
==15440== 
==15440== 12,272 bytes in 59 blocks are still reachable in loss record 150 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x750CAC5: _XEnq (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x750E2EF: _XReply (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x75085A9: XSync (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x569050F: _gdk_image_new_for_depth (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56661B7: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56664B8: _gdk_image_get_scratch (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x567154C: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x5671C08: gdk_draw_rgb_image_dithalign (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x5662695: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56869F2: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x407880: configPixmap (in /home/mlallema/detection)
==15440== 
==15440== 
==15440== 16,352 bytes in 2 blocks are still reachable in loss record 151 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x75016B4: (within /usr/lib/libX11.so.6.2.0)
==15440==    by 0x7501A89: _XrmInternalStringToQuark (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x751E938: _XlcGetCharSet (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x751E58C: _XlcAddCT (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x751E81C: _XlcInitCTInfo (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x752481B: (within /usr/lib/libX11.so.6.2.0)
==15440==    by 0x7522A57: (within /usr/lib/libX11.so.6.2.0)
==15440==    by 0x75245D5: _XlcCreateLC (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x7543D9F: _XlcUtf8Loader (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x752AAD3: _XOpenLC (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x752ABC7: _XlcCurrentLC (in /usr/lib/libX11.so.6.2.0)
==15440== 
==15440== 
==15440== 16,384 bytes in 1 blocks are still reachable in loss record 152 of 167
==15440==    at 0x4C1FD92: calloc (vg_replace_malloc.c:279)
==15440==    by 0x74FC386: XOpenDisplay (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x567EF18: gdk_display_open (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x565E77C: gdk_display_open_default_libgtk_only (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x51E64E3: gtk_init_check (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x51E6508: gtk_init (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x402827: main (in /home/mlallema/detection)
==15440== 
==15440== 
==15440== 34,400 bytes in 1,075 blocks are indirectly lost in loss record 153 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x61B69ED: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61B3B63: FcFontRenderPrepare (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x8A40E6E: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x702041C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702077C: pango_itemize_with_base_dir (in /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x7027CD2: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702887C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x51D8A52: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x511C52D: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD897: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED84C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 54,688 (19,200 direct, 35,488 indirect) bytes in 37 blocks are definitely lost in loss record 154 of 167
==15440==    at 0x4C20B6B: realloc (vg_replace_malloc.c:306)
==15440==    by 0x61B6153: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61B6B2D: (within /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x61B3A65: FcFontRenderPrepare (in /usr/lib/libfontconfig.so.1.2.0)
==15440==    by 0x8A40E6E: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x702041C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702077C: pango_itemize_with_base_dir (in /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x7027CD2: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702887C: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x51D8A52: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x511C52D: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD897: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 22,528 bytes in 1 blocks are still reachable in loss record 155 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x750BE3F: _XAllocScratch (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x7500E9B: (within /usr/lib/libX11.so.6.2.0)
==15440==    by 0x750125A: XPutImage (in /usr/lib/libX11.so.6.2.0)
==15440==    by 0x56873C9: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56715E8: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x5671C08: gdk_draw_rgb_image_dithalign (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x5662695: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56869F2: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x407880: configPixmap (in /home/mlallema/detection)
==15440==    by 0x406139: configure_event (in /home/mlallema/detection)
==15440==    by 0x51EB68C: _gtk_marshal_BOOLEAN__BOXED (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440== 
==15440== 
==15440== 101,249 bytes in 106 blocks are still reachable in loss record 156 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x8C7181F: ft_mem_qalloc (in /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x8C76E62: ft_mem_alloc (in /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x8C859EA: TT_New_Context (in /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x8C85AC8: (within /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x8C77692: FT_Add_Module (in /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x8C7177E: FT_Add_Default_Modules (in /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x8C71807: FT_Init_FreeType (in /usr/lib/libfreetype.so.6.3.10)
==15440==    by 0x5F9A034: (within /usr/lib/libpangocairo-1.0.so.0.1600.2)
==15440==    by 0x77FCC5F: g_type_create_instance (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E402C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E2483: g_object_newv (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 105,184 bytes in 50 blocks are possibly lost in loss record 157 of 167
==15440==    at 0x4C1FC7D: memalign (vg_replace_malloc.c:332)
==15440==    by 0x4C1FCD6: posix_memalign (vg_replace_malloc.c:421)
==15440==    by 0x7E5EB60: (within /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E5FE7B: g_slice_alloc (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E5FF95: g_slice_alloc0 (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x77FC79E: g_type_create_instance (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E402C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E2483: g_object_newv (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E2EAB: g_object_new_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E30E0: g_object_new (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x51D5E21: gtk_label_new (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x512E2E1: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440== 
==15440== 
==15440== 121,546 bytes in 1,038 blocks are still reachable in loss record 158 of 167
==15440==    at 0x4C1FD92: calloc (vg_replace_malloc.c:279)
==15440==    by 0x7E50891: g_malloc0 (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x77FBEA0: g_type_class_ref (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E2CE0: g_object_new_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77E30E0: g_object_new (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x512259E: gtk_adjustment_new (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x521A8C4: gtk_progress_set_adjustment (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x521AB2C: gtk_progress_get_current_percentage (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x521CFF2: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x521B4AE: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED84C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 230,272 bytes in 2,875 blocks are still reachable in loss record 159 of 167
==15440==    at 0x4C20B6B: realloc (vg_replace_malloc.c:306)
==15440==    by 0x7E507F0: g_realloc (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E2CDD9: (within /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E2D2E9: g_array_insert_vals (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x522811A: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x5228321: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0xA5FC106: (within /usr/lib/gtk-2.0/2.10.0/engines/libubuntulooks.so)
==15440==    by 0x52296F0: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x5229C15: gtk_rc_get_style (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x52EE467: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x52474C4: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x524771E: _gtk_size_group_compute_requisition (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440== 
==15440== 
==15440== 261,517 bytes in 6,908 blocks are still reachable in loss record 160 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x7E5090A: g_malloc (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E627FE: g_strdup (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E6E7A9: g_set_prgname (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E56502: g_option_context_parse (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x51E647E: gtk_parse_args (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x51E64D8: gtk_init_check (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x51E6508: gtk_init (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x402827: main (in /home/mlallema/detection)
==15440== 
==15440== 
==15440== 369,024 bytes in 664 blocks are still reachable in loss record 161 of 167
==15440==    at 0x4C1FC7D: memalign (vg_replace_malloc.c:332)
==15440==    by 0x4C1FCD6: posix_memalign (vg_replace_malloc.c:421)
==15440==    by 0x7E5EB60: (within /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E5FE7B: g_slice_alloc (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x7E60662: g_slist_append (in /usr/lib/libglib-2.0.so.0.1200.11)
==15440==    by 0x5227D92: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x5229BB5: gtk_rc_get_style (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x52EE467: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x52474C4: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x524771E: _gtk_size_group_compute_requisition (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x51AB317: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD897: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 4,882,368 bytes in 76,287 blocks are indirectly lost in loss record 162 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x40434F: calculHistoRGB (in /home/mlallema/detection)
==15440==    by 0x40806D: kppvManhattan (in /home/mlallema/detection)
==15440==    by 0x406FF7: reconnaissancePortraitManhattan (in /home/mlallema/detection)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED407: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EEA12: g_signal_emit (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x512F688: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED84C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 5,492,672 (610,304 direct, 4,882,368 indirect) bytes in 4,768 blocks are definitely lost in loss record 163 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x404313: calculHistoRGB (in /home/mlallema/detection)
==15440==    by 0x40806D: kppvManhattan (in /home/mlallema/detection)
==15440==    by 0x406FF7: reconnaissancePortraitManhattan (in /home/mlallema/detection)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED407: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EEA12: g_signal_emit (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x512F688: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED84C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 786,432 bytes in 12 blocks are still reachable in loss record 164 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x56903FA: _gdk_image_new_for_depth (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56661B7: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56664DD: _gdk_image_get_scratch (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x567154C: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x5671C08: gdk_draw_rgb_image_dithalign (in /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x5662695: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x56869F2: (within /usr/lib/libgdk-x11-2.0.so.0.1000.11)
==15440==    by 0x407880: configPixmap (in /home/mlallema/detection)
==15440==    by 0x406139: configure_event (in /home/mlallema/detection)
==15440==    by 0x51EB68C: _gtk_marshal_BOOLEAN__BOXED (in /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440== 
==15440== 
==15440== 817,074 bytes in 2,086 blocks are still reachable in loss record 165 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x8A45401: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x8A52450: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x8A5D936: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x8A53D7F: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x8A4413D: pango_ot_info_get_gpos (in /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x8A44296: (within /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0x8A44A40: pango_ot_info_find_script (in /usr/lib/libpangoft2-1.0.so.0.1600.2)
==15440==    by 0xB308BE2: (within /usr/lib/pango/1.6.0/modules/pango-basic-fc.so)
==15440==    by 0x703121D: pango_shape (in /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x702524B: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440==    by 0x7027A8D: (within /usr/lib/libpango-1.0.so.0.1600.2)
==15440== 
==15440== 
==15440== 877,200 bytes in 3 blocks are still reachable in loss record 166 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x5AFDEA4: gdk_pixbuf_new (in /usr/lib/libgdk_pixbuf-2.0.so.0.1000.11)
==15440==    by 0xA8299BF: (within /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-jpeg.so)
==15440==    by 0x5B013A2: _gdk_pixbuf_generic_image_load (in /usr/lib/libgdk_pixbuf-2.0.so.0.1000.11)
==15440==    by 0x5B025A9: gdk_pixbuf_new_from_file (in /usr/lib/libgdk_pixbuf-2.0.so.0.1000.11)
==15440==    by 0x402AA7: main (in /home/mlallema/detection)
==15440== 
==15440== 
==15440== 3,239,904 bytes in 6 blocks are still reachable in loss record 167 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x5AFDFBC: gdk_pixbuf_copy (in /usr/lib/libgdk_pixbuf-2.0.so.0.1000.11)
==15440==    by 0x402AE7: main (in /home/mlallema/detection)
==15440== 
==15440== LEAK SUMMARY:
==15440==    definitely lost: 630,426 bytes in 4,830 blocks.
==15440==    indirectly lost: 4,918,192 bytes in 77,409 blocks.
==15440==      possibly lost: 106,784 bytes in 70 blocks.
==15440==    still reachable: 7,037,182 bytes in 17,504 blocks.
==15440==         suppressed: 0 bytes in 0 blocks.

**teuf13** · 29/07/2007, 18h05

Alors, déjà ce qu'il faut savoir, c'est qu'il faut ignorer tous les "still reachable", au moins en première approche, donc par exemple le premier on s'en fout. C'est de la mémoire non libérée, mais sur laquelle existe un pointeur, donc tu aurais pu la libérer si tu avais voulu.
Ce qui nous intéresse, c'est les "definitely lost", quand tu regardes les stats tout à la fin, valgrind en a trouvé :

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==15440== LEAK SUMMARY:
==15440==    definitely lost: 630,426 bytes in 4,830 blocks.
==15440==    indirectly lost: 4,918,192 bytes in 77,409 blocks.
==15440==      possibly lost: 106,784 bytes in 70 blocks.
==15440==    still reachable: 7,037,182 bytes in 17,504 blocks.
==15440==         suppressed: 0 bytes in 0 blocks.

Et effectivement, en regardant les traces, y a :

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==15440== 5,492,672 (610,304 direct, 4,882,368 indirect) bytes in 4,768 blocks are definitely lost in loss record 163 of 167
==15440==    at 0x4C20A69: malloc (vg_replace_malloc.c:149)
==15440==    by 0x404313: calculHistoRGB (in /home/mlallema/detection)
==15440==    by 0x40806D: kppvManhattan (in /home/mlallema/detection)
==15440==    by 0x406FF7: reconnaissancePortraitManhattan (in /home/mlallema/detection)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED407: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EEA12: g_signal_emit (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x512F688: (within /usr/lib/libgtk-x11-2.0.so.0.1000.11)
==15440==    by 0x77DD7D9: g_closure_invoke (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77ED84C: (within /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==    by 0x77EE842: g_signal_emit_valist (in /usr/lib/libgobject-2.0.so.0.1200.11)
==15440==

qui t'indique que y a eu un malloc sur lequel t'as pas fait de free dans calculHistoRGB. Si tu compiles ton programme avec des infos de debug (-g3 -ggdb3), t'auras même le n° de la ligne à laquelle le malloc a été fait.

Il vaut mieux avoir la variable G_SLICE à la valeur always-malloc dans ton environnement aussi quand tu utilises valgrind avec gtk+.

g-free ( pixbuf ) ?

GTK+ avec C & C++

Vue hybride

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