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Fix colormap handling for containers. (#2450) 

This commit correctly handles colormaps by

* Using the static default colormap we determine on startup if the
  con has the corresponding depth. This avoids creating pointless
  colormaps.
* Not freeing the default colormap to not have stray colormaps on
  containers. This fixes an issue with certain programs such as xwd.
* Creating a custom colormap when necessary and freeing it when the
  container is killed.

fixes #2435
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Ingo Bürk 2016-09-14 09:13:17 +02:00 committed by Michael Stapelberg
parent 555f458d7a
commit d48c9b1e33
2 changed files with 18 additions and 7 deletions
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3
include/data.h
View File

@ -699,4 +699,7 @@ struct Con {
/* Depth of the container window */
uint16_t depth;
/* The colormap for this con if a custom one is used. */
xcb_colormap_t colormap;
};

22
src/x.c
View File

@ -105,11 +105,18 @@ void x_con_init(Con *con) {
uint32_t mask = 0;
uint32_t values[5];
/* For custom visuals, we need to create a colormap before creating
* this window. It will be freed directly after creating the window. */
xcb_visualid_t visual = get_visualid_by_depth(con->depth);
xcb_colormap_t win_colormap = xcb_generate_id(conn);
xcb_create_colormap_checked(conn, XCB_COLORMAP_ALLOC_NONE, win_colormap, root, visual);
xcb_colormap_t win_colormap;
if (con->depth != root_depth) {
/* We need to create a custom colormap. */
win_colormap = xcb_generate_id(conn);
xcb_create_colormap(conn, XCB_COLORMAP_ALLOC_NONE, win_colormap, root, visual);
con->colormap = win_colormap;
} else {
/* Use the default colormap. */
win_colormap = colormap;
con->colormap = XCB_NONE;
}
/* We explicitly set a background color and border color (even though we
* don’t even have a border) because the X11 server requires us to when
@ -144,9 +151,6 @@ void x_con_init(Con *con) {
(strlen("i3-frame") + 1) * 2,
"i3-frame\0i3-frame\0");
if (win_colormap != XCB_NONE)
xcb_free_colormap(conn, win_colormap);
struct con_state *state = scalloc(1, sizeof(struct con_state));
state->id = con->frame.id;
state->mapped = false;
@ -229,6 +233,10 @@ void x_move_win(Con *src, Con *dest) {
void x_con_kill(Con *con) {
con_state *state;
if (con->colormap != XCB_NONE) {
xcb_free_colormap(conn, con->colormap);
}
draw_util_surface_free(conn, &(con->frame));
draw_util_surface_free(conn, &(con->frame_buffer));
xcb_destroy_window(conn, con->frame.id);