ui: install logo icons to $prefix/share/icons

QEMU currently installs logos to $prefix/share/qemu/ which means no GUI
toolkit or applications can find them by default.

The accepted standards for desktop applications declare that application
logos / icons should be installed under $prefix/share/icons, so use this
directory location.

Pre-rendered icons are provided at the standard sizes expected for GUI
applications, along with the scalable SVG, to ensure maximum portability.

The PNGs are rendered from the SVG using inkscape, however, this is not
wired up into the default make rules to avoid requiring inkscape as a
mandatory tool in build systems / developer workstations.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20190110120047.25369-2-berrange@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Makefile

@@ -667,7 +667,6 @@ pxe-pcnet.rom pxe-rtl8139.rom pxe-virtio.rom \
 efi-e1000.rom efi-eepro100.rom efi-ne2k_pci.rom \
 efi-pcnet.rom efi-rtl8139.rom efi-virtio.rom \
 efi-e1000e.rom efi-vmxnet3.rom \
-qemu-icon.bmp qemu_logo_no_text.svg \
 bamboo.dtb canyonlands.dtb petalogix-s3adsp1800.dtb petalogix-ml605.dtb \
 multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin \
 s390-ccw.img s390-netboot.img \
@@ -720,6 +719,7 @@ ifneq (,$(findstring qemu-ga,$(TOOLS)))
 endif
 endif
 
+ICON_SIZES=16x16 24x24 32x32 48x48 64x64 128x128 256x256 512x512
 
 install: all $(if $(BUILD_DOCS),install-doc) install-datadir install-localstatedir
 ifneq ($(TOOLS),)
@@ -741,6 +741,17 @@ ifneq ($(BLOBS),)
 		$(INSTALL_DATA) $(SRC_PATH)/pc-bios/$$x "$(DESTDIR)$(qemu_datadir)"; \
 	done
 endif
+	for s in $(ICON_SIZES); do \
+		mkdir -p "$(DESTDIR)/$(qemu_icondir)/hicolor/$${s}/apps"; \
+		$(INSTALL_DATA) $(SRC_PATH)/ui/icons/qemu_$${s}.png \
+			"$(DESTDIR)/$(qemu_icondir)/hicolor/$${s}/apps/qemu.png"; \
+	done; \
+	mkdir -p "$(DESTDIR)/$(qemu_icondir)/hicolor/32x32/apps"; \
+	$(INSTALL_DATA) $(SRC_PATH)/ui/icons/qemu_32x32.bmp \
+		"$(DESTDIR)/$(qemu_icondir)/hicolor/32x32/apps/qemu.bmp"; \
+	mkdir -p "$(DESTDIR)/$(qemu_icondir)/hicolor/scalable/apps"; \
+	$(INSTALL_DATA) $(SRC_PATH)/ui/icons/qemu.svg \
+		"$(DESTDIR)/$(qemu_icondir)/hicolor/scalable/apps/qemu.svg"
 ifdef CONFIG_GTK
 	$(MAKE) -C po $@
 endif

configure

@@ -5745,6 +5745,7 @@ qemu_confdir=$sysconfdir$confsuffix
 qemu_moddir=$libdir$confsuffix
 qemu_datadir=$datadir$confsuffix
 qemu_localedir="$datadir/locale"
+qemu_icondir="$datadir/icons"
 
 # We can only support ivshmem if we have eventfd
 if [ "$eventfd" = "yes" ]; then
@@ -6210,6 +6211,7 @@ if test "$mingw32" = "no" ; then
 fi
 echo "qemu_helperdir=$libexecdir" >> $config_host_mak
 echo "qemu_localedir=$qemu_localedir" >> $config_host_mak
+echo "qemu_icondir=$qemu_icondir" >> $config_host_mak
 echo "libs_softmmu=$libs_softmmu" >> $config_host_mak
 echo "GIT=$git" >> $config_host_mak
 echo "GIT_SUBMODULES=$git_submodules" >> $config_host_mak

ui/gtk.c

@@ -2214,8 +2214,8 @@ static void gtk_display_init(DisplayState *ds, DisplayOptions *opts)
     VirtualConsole *vc;
 
     GtkDisplayState *s = g_malloc0(sizeof(*s));
-    char *filename;
     GdkDisplay *window_display;
+    GtkIconTheme *theme;
 
     if (!gtkinit) {
         fprintf(stderr, "gtk initialization failed\n");
@@ -2224,6 +2224,9 @@ static void gtk_display_init(DisplayState *ds, DisplayOptions *opts)
     assert(opts->type == DISPLAY_TYPE_GTK);
     s->opts = opts;
 
+    theme = gtk_icon_theme_get_default();
+    gtk_icon_theme_prepend_search_path(theme, CONFIG_QEMU_ICONDIR);
+
     s->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
     s->vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
     s->notebook = gtk_notebook_new();
@@ -2248,17 +2251,7 @@ static void gtk_display_init(DisplayState *ds, DisplayOptions *opts)
     qemu_add_mouse_mode_change_notifier(&s->mouse_mode_notifier);
     qemu_add_vm_change_state_handler(gd_change_runstate, s);
 
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu_logo_no_text.svg");
-    if (filename) {
-        GError *error = NULL;
-        GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, &error);
-        if (pixbuf) {
-            gtk_window_set_icon(GTK_WINDOW(s->window), pixbuf);
-        } else {
-            g_error_free(error);
-        }
-        g_free(filename);
-    }
+    gtk_window_set_icon_name(GTK_WINDOW(s->window), "qemu");
 
     gd_create_menus(s);
 

ui/icons/Makefile

@@ -0,0 +1,13 @@
+
+# Regenerate bitmaps from the SVG using inkscape CLI export
+# and ImageMagick. Don't use ImageMagick for the initial
+# SVG conversion, since it merely calls inkscape, but uses
+# 96 DPI res resulting in poor quality output.
+
+regenerate:
+	for s in 16 24 32 48 64 128 256 512; \
+	do \
+	    inkscape --without-gui --export-png=qemu_$${s}x$${s}.png \
+		--export-width=$$s --export-height=$$s qemu.svg ; \
+	done
+	convert qemu_32x32.png qemu_32x32.bmp

ui/sdl2.c

@@ -762,7 +762,6 @@ static void sdl2_display_early_init(DisplayOptions *o)
 static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 {
     uint8_t data = 0;
-    char *filename;
     int i;
     SDL_SysWMinfo info;
 
@@ -837,15 +836,12 @@ static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
     }
 
     /* Load a 32x32x4 image. White pixels are transparent. */
-    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
-    if (filename) {
-        SDL_Surface *image = SDL_LoadBMP(filename);
-        if (image) {
-            uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
-            SDL_SetColorKey(image, SDL_TRUE, colorkey);
-            SDL_SetWindowIcon(sdl2_console[0].real_window, image);
-        }
-        g_free(filename);
+    SDL_Surface *image = SDL_LoadBMP(CONFIG_QEMU_ICONDIR
+                                     "/hicolor/32x32/apps/qemu.bmp");
+    if (image) {
+        uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
+        SDL_SetColorKey(image, SDL_TRUE, colorkey);
+        SDL_SetWindowIcon(sdl2_console[0].real_window, image);
     }
 
     gui_grab = 0;