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new_backend: New interface

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Move more logic out of the backend. The backends are now more agnostic
to what happens in compton.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-02-26 23:52:37 +00:00
parent 11c8655206
commit 3707f792fb
14 changed files with 742 additions and 572 deletions
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59
src/x.c
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@ -145,6 +145,34 @@ x_get_pictform_for_visual(xcb_connection_t *c, xcb_visualid_t visual) {
return NULL;
}
static xcb_visualid_t attr_pure
x_get_visual_for_pictfmt(xcb_render_query_pict_formats_reply_t *r,
xcb_render_pictformat_t fmt) {
for (auto screen = xcb_render_query_pict_formats_screens_iterator(r);
screen.rem; xcb_render_pictscreen_next(&screen)) {
for (auto depth = xcb_render_pictscreen_depths_iterator(screen.data);
depth.rem; xcb_render_pictdepth_next(&depth)) {
for (auto pv = xcb_render_pictdepth_visuals_iterator(depth.data); pv.rem;
xcb_render_pictvisual_next(&pv)) {
if (pv.data->format == fmt) {
return pv.data->visual;
}
}
}
}
return XCB_NONE;
}
xcb_visualid_t
x_get_visual_for_standard(xcb_connection_t *c, xcb_pict_standard_t std) {
x_get_server_pictfmts(c);
auto pictfmt =
xcb_render_util_find_standard_format(g_pictfmts, std);
return x_get_visual_for_pictfmt(g_pictfmts, pictfmt->id);
}
int x_get_visual_depth(xcb_connection_t *c, xcb_visualid_t visual) {
auto setup = xcb_get_setup(c);
for (auto screen = xcb_setup_roots_iterator(setup); screen.rem; xcb_screen_next(&screen)) {
@ -548,3 +576,34 @@ size_t x_picture_filter_from_conv(const conv *kernel, double center, xcb_render_
buf[kernel->h / 2 * kernel->w + kernel->w / 2 + 2] = DOUBLE_TO_XFIXED(center * factor);
return kernel->w * kernel->h + 2;
}
/// Generate a search criteria for fbconfig from a X visual.
/// Returns {-1, -1, -1, -1, -1, -1} on failure
struct xvisual_info
x_get_visual_info(xcb_connection_t *c, xcb_visualid_t visual) {
auto pictfmt = x_get_pictform_for_visual(c, visual);
auto depth = x_get_visual_depth(c, visual);
if (!pictfmt || depth == -1) {
log_error("Invalid visual %#03x", visual);
return (struct xvisual_info){-1, -1, -1, -1, -1, -1};
}
if (pictfmt->type != XCB_RENDER_PICT_TYPE_DIRECT) {
log_error("compton cannot handle non-DirectColor visuals. Report an "
"issue if you see this error message.");
return (struct xvisual_info){-1, -1, -1, -1, -1, -1};
}
int red_size = popcountl(pictfmt->direct.red_mask),
blue_size = popcountl(pictfmt->direct.blue_mask),
green_size = popcountl(pictfmt->direct.green_mask),
alpha_size = popcountl(pictfmt->direct.alpha_mask);
return (struct xvisual_info){
.red_size = red_size,
.green_size = green_size,
.blue_size = blue_size,
.alpha_size = alpha_size,
.visual_depth = depth,
.visual = visual,
};
}