Implement double-buffering to get rid of flickering
This commit is contained in:
Axel Wagner
parent
60da522e13
commit
fe24eb748c
@ -43,6 +43,7 @@ struct i3_output {
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rect rect; /* The rect (relative to the root-win) */
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xcb_window_t bar; /* The id of the bar of the output */
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xcb_pixmap_t buffer; /* An extra pixmap for double-buffering */
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xcb_gcontext_t bargc; /* The graphical context of the bar */
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struct ws_head *workspaces; /* The workspaces on this output */
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150
i3bar/src/xcb.c
150
i3bar/src/xcb.c
@ -221,10 +221,11 @@ void init_xcb(char *fontname) {
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/* We load and allocate the font */
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xcb_font = xcb_generate_id(xcb_connection);
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xcb_open_font(xcb_connection,
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xcb_font,
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strlen(fontname),
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fontname);
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xcb_void_cookie_t open_font_cookie;
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open_font_cookie = xcb_open_font_checked(xcb_connection,
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xcb_font,
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strlen(fontname),
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fontname);
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/* We also need the fontheight to configure our bars accordingly */
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xcb_list_fonts_with_info_cookie_t cookie;
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@ -249,6 +250,14 @@ void init_xcb(char *fontname) {
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/* Now we get the atoms and save them in a nice data-structure */
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get_atoms();
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xcb_generic_error_t *err = xcb_request_check(xcb_connection,
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open_font_cookie);
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if (err != NULL) {
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printf("ERROR: Could not open font! XCB-Error-Code: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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/* Now we calculate the font-height */
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xcb_list_fonts_with_info_reply_t *reply;
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reply = xcb_list_fonts_with_info_reply(xcb_connection,
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@ -333,46 +342,81 @@ void reconfig_windows() {
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printf("Creating Window for output %s\n", walk->name);
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walk->bar = xcb_generate_id(xcb_connection);
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walk->buffer = xcb_generate_id(xcb_connection);
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mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
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/* Black background */
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values[0] = xcb_screens->black_pixel;
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/* The events we want to receive */
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values[1] = XCB_EVENT_MASK_EXPOSURE |
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XCB_EVENT_MASK_BUTTON_PRESS;
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xcb_create_window(xcb_connection,
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xcb_screens->root_depth,
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walk->bar,
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xcb_root,
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walk->rect.x, walk->rect.y,
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walk->rect.w, font_height + 6,
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1,
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XCB_WINDOW_CLASS_INPUT_OUTPUT,
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xcb_screens->root_visual,
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mask,
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values);
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xcb_void_cookie_t win_cookie = xcb_create_window_checked(xcb_connection,
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xcb_screens->root_depth,
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walk->bar,
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xcb_root,
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walk->rect.x, walk->rect.y,
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walk->rect.w, font_height + 6,
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1,
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XCB_WINDOW_CLASS_INPUT_OUTPUT,
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xcb_screens->root_visual,
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mask,
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values);
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xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
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xcb_screens->root_depth,
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walk->buffer,
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walk->bar,
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walk->rect.w,
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walk->rect.h);
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/* We want dock-windows (for now) */
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xcb_change_property(xcb_connection,
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XCB_PROP_MODE_REPLACE,
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walk->bar,
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atoms[_NET_WM_WINDOW_TYPE],
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atoms[ATOM],
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32,
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1,
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(unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
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xcb_void_cookie_t prop_cookie = xcb_change_property(xcb_connection,
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XCB_PROP_MODE_REPLACE,
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walk->bar,
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atoms[_NET_WM_WINDOW_TYPE],
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atoms[ATOM],
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32,
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1,
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(unsigned char*) &atoms[_NET_WM_WINDOW_TYPE_DOCK]);
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/* We also want a graphics-context (the "canvas" on which we draw) */
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walk->bargc = xcb_generate_id(xcb_connection);
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mask = XCB_GC_FONT;
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values[0] = xcb_font;
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xcb_create_gc(xcb_connection,
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walk->bargc,
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walk->bar,
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mask,
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values);
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xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
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walk->bargc,
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walk->bar,
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mask,
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values);
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/* We finally map the bar (display it on screen) */
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xcb_map_window(xcb_connection, walk->bar);
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xcb_void_cookie_t map_cookie = xcb_map_window_checked(xcb_connection, walk->bar);
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if ((err = xcb_request_check(xcb_connection, win_cookie)) != NULL) {
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printf("ERROR: Could not create Window. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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if ((err = xcb_request_check(xcb_connection, pm_cookie)) != NULL) {
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printf("ERROR: Could not create Pixmap. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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if ((err = xcb_request_check(xcb_connection, prop_cookie)) != NULL) {
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printf("ERROR: Could not set dock mode. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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if ((err = xcb_request_check(xcb_connection, gc_cookie)) != NULL) {
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printf("ERROR: Could not create graphical context. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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if ((err = xcb_request_check(xcb_connection, map_cookie)) != NULL) {
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printf("ERROR: Could not map window. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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} else {
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/* We already have a bar, so we just reconfigure it */
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mask = XCB_CONFIG_WINDOW_X |
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@ -384,11 +428,32 @@ void reconfig_windows() {
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values[2] = walk->rect.w;
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values[3] = font_height + 6;
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printf("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
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xcb_configure_window(xcb_connection,
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walk->bar,
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mask,
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values);
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}
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xcb_void_cookie_t cfg_cookie = xcb_configure_window_checked(xcb_connection,
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walk->bar,
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mask,
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values);
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xcb_free_pixmap(xcb_connection, walk->buffer);
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walk->buffer = xcb_generate_id(xcb_connection);
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xcb_void_cookie_t pm_cookie = xcb_create_pixmap_checked(xcb_connection,
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xcb_screens->root_depth,
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walk->buffer,
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walk->bar,
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walk->rect.w,
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walk->rect.h);
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if ((err = xcb_request_check(xcb_connection, cfg_cookie)) != NULL) {
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printf("ERROR: Could not reconfigure window. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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if ((err = xcb_request_check(xcb_connection, pm_cookie)) != NULL) {
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printf("ERROR: Could not create Pixmap. XCB-errorcode: %d\n", err->error_code);
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exit(EXIT_FAILURE);
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}
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}
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}
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}
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@ -415,7 +480,7 @@ void draw_bars() {
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&color);
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xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
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xcb_poly_fill_rectangle(xcb_connection,
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outputs_walk->bar,
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outputs_walk->buffer,
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outputs_walk->bargc,
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1,
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&rect);
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@ -437,7 +502,7 @@ void draw_bars() {
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xcb_void_cookie_t cookie;
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cookie = xcb_image_text_16(xcb_connection,
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glyph_count,
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outputs_walk->bar,
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outputs_walk->buffer,
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outputs_walk->bargc,
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outputs_walk->rect.w - get_string_width(text, glyph_count) - 4,
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font_height + 1,
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@ -470,7 +535,7 @@ void draw_bars() {
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&color);
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xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
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xcb_poly_fill_rectangle(xcb_connection,
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outputs_walk->bar,
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outputs_walk->buffer,
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outputs_walk->bargc,
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1,
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&rect);
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@ -481,13 +546,22 @@ void draw_bars() {
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&color);
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xcb_image_text_16(xcb_connection,
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ws_walk->name_glyphs,
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outputs_walk->bar,
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outputs_walk->buffer,
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outputs_walk->bargc,
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i + 5, font_height + 1,
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ws_walk->ucs2_name);
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i += 10 + ws_walk->name_width;
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}
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xcb_copy_area(xcb_connection,
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outputs_walk->buffer,
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outputs_walk->bar,
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outputs_walk->bargc,
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0, 0,
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0, 0,
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outputs_walk->rect.w,
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outputs_walk->rect.h);
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i = 0;
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}
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}
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