img-save-v33.diff

diff --git a/commands.c b/commands.c
index 3257b1e..abffd73 100644
--- a/commands.c
+++ b/commands.c
@@ -376,6 +376,12 @@ bool ci_rotate(arg_t degree)
 	return true;
 }
 
+bool ci_save(arg_t unused)
+{
+	img_save(&img);
+	return true;
+}
+
 bool ci_flip(arg_t dir)
 {
 	img_flip(&img, dir);
diff --git a/commands.h b/commands.h
index 4e694f0..22cf7e5 100644
--- a/commands.h
+++ b/commands.h
@@ -32,6 +32,7 @@ bool ci_flip(arg_t);
 bool ci_navigate(arg_t);
 bool ci_navigate_frame(arg_t);
 bool ci_rotate(arg_t);
+bool ci_save(arg_t);
 bool ci_scroll(arg_t);
 bool ci_scroll_to_center(arg_t);
 bool ci_scroll_to_edge(arg_t);
@@ -79,6 +80,7 @@ bool ct_select(arg_t);
 #define i_navigate { ci_navigate, MODE_IMAGE }
 #define i_navigate_frame { ci_navigate_frame, MODE_IMAGE }
 #define i_rotate { ci_rotate, MODE_IMAGE }
+#define i_save { ci_save, MODE_IMAGE }
 #define i_scroll { ci_scroll, MODE_IMAGE }
 #define i_scroll_to_center { ci_scroll_to_center, MODE_IMAGE }
 #define i_scroll_to_edge { ci_scroll_to_edge, MODE_IMAGE }
diff --git a/image.c b/image.c
index 50d792f..e70c7b6 100644
--- a/image.c
+++ b/image.c
@@ -40,6 +40,8 @@ enum { DEF_ANIM_DELAY = 75 };
 #define ZOOM_MIN (zoom_levels[0] / 100)
 #define ZOOM_MAX (zoom_levels[ARRLEN(zoom_levels) - 1] / 100)
 
+Imlib_Image img_now = NULL;
+
 static int calc_cache_size(void)
 {
 	long cache, pages = -1, page_size = -1;
@@ -425,6 +427,18 @@ static bool img_fit(img_t *img)
 	}
 }
 
+static void img_clone_rendered(void)
+{
+	Imlib_Image aux = imlib_context_get_image();
+	if (img_now) {
+		imlib_context_set_image(img_now);
+		imlib_free_image();
+		imlib_context_set_image(aux);
+	}
+	if ((img_now = imlib_clone_image()) == NULL)
+		error(EXIT_FAILURE, 0, "Failed to clone image");
+}
+
 void img_render(img_t *img)
 {
 	win_t *win;
@@ -512,11 +526,13 @@ void img_render(img_t *img)
 		imlib_blend_image_onto_image(img->im, 0, sx, sy, sw, sh, 0, 0, dw, dh);
 		imlib_context_set_color_modifier(NULL);
 		imlib_render_image_on_drawable(dx, dy);
+		img_clone_rendered();
 		imlib_free_image();
 		imlib_context_set_color_modifier(img->cmod);
 	} else {
 fallback:
 		imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
+		img_clone_rendered();
 	}
 	img->dirty = false;
 }
@@ -688,6 +704,53 @@ void img_rotate(img_t *img, degree_t d)
 	img->dirty = true;
 }
 
+void img_save(img_t *img)
+{
+	Imlib_Load_Error err;
+	char outpath[PATH_MAX];
+	const char *name, *basename, *extension;
+	int name_len;
+	int n;
+
+	name = files[fileidx].name;
+	if ((basename = strrchr(name, '/')) == NULL)
+		basename = name;
+	if (*basename == '/')
+		basename += 1;
+	if (*basename == '.') /* don't count dotfiles as extension */
+		basename += 1;
+
+	if ((extension = strrchr(basename, '.')) != NULL && extension[1] != '\0')
+		name_len = strlen(name) - strlen(extension);
+	else
+		name_len = strlen(name);
+
+	if (img_now == NULL)
+		error(EXIT_FAILURE, 0, "Current image should not be NULL.");
+	imlib_context_set_image(img_now);
+
+	if (imlib_image_has_alpha()) { /* FIXME: doesn't work */
+		extension = "png";
+		imlib_image_set_format(extension);
+		imlib_image_attach_data_value("compression", NULL, 8, NULL);
+	} else {
+		extension = "jpg";
+		imlib_image_set_format(extension);
+		imlib_image_attach_data_value("quality", NULL, 96, NULL);
+	}
+
+	n = snprintf(outpath, sizeof(outpath), "%.*s_nsxiv.%s", name_len, name, extension);
+	if ((size_t)n >= sizeof(outpath)) {
+		error(0, 0, "File path \"%s\" is too long. The image will not be saved.");
+		return;
+	}
+
+	imlib_save_image_with_error_return(outpath, &err);
+	if (err)
+		error(0, 0, "Error saving image %s: %d", outpath, err);
+}
+
+
 void img_flip(img_t *img, flipdir_t d)
 {
 	unsigned int i;
diff --git a/nsxiv.h b/nsxiv.h
index 3e30c80..1e98488 100644
--- a/nsxiv.h
+++ b/nsxiv.h
@@ -229,6 +229,7 @@ bool img_pan(img_t*, direction_t, int);
 bool img_pan_center(img_t*);
 bool img_pan_edge(img_t*, direction_t);
 void img_rotate(img_t*, degree_t);
+void img_save(img_t*);
 void img_flip(img_t*, flipdir_t);
 void img_toggle_antialias(img_t*);
 void img_update_color_modifiers(img_t*);