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swaybar: Lift background clearing out of main rendering function

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This avoids us from using a bogus background_color value that
mutates as swaybar renders things and deciding opacity depending on
that.

Also remove a redundant full surface clear. Just directly write our
desired background color.
This commit is contained in:
Alexander Orzechowski 2023-03-27 08:50:44 +02:00 committed by Kenny Levinsen
parent 5d5b21dcce
commit 9cf66e8c7c
1 changed files with 14 additions and 13 deletions
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27
swaybar/render.c
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@ -693,15 +693,6 @@ static uint32_t render_to_cairo(struct render_context *ctx) {
struct swaybar_output *output = ctx->output;
struct swaybar *bar = output->bar;
struct swaybar_config *config = bar->config;
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
if (output->focused) {
ctx->background_color = config->colors.focused_background;
} else {
ctx->background_color = config->colors.background;
}
cairo_set_source_u32(cairo, ctx->background_color);
cairo_paint(cairo);
int th;
get_text_size(cairo, config->font_description, NULL, &th, NULL, 1, false, "");
@ -763,8 +754,17 @@ void render_frame(struct swaybar_output *output) {
free_hotspots(&output->hotspots);
uint32_t background_color;
if (output->focused) {
background_color = output->bar->config->colors.focused_background;
} else {
background_color = output->bar->config->colors.background;
}
struct render_context ctx = { 0 };
ctx.output = output;
// initial background color used for deciding the best way to antialias text
ctx.background_color = background_color;
cairo_surface_t *recorder = cairo_recording_surface_create(
CAIRO_CONTENT_COLOR_ALPHA, NULL);
@ -786,10 +786,11 @@ void render_frame(struct swaybar_output *output) {
ctx.textaa_sharp = fo;
}
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, background_color);
cairo_paint(cairo);
cairo_restore(cairo);
uint32_t height = render_to_cairo(&ctx);
int config_height = output->bar->config->height;
if (config_height > 0) {
@ -834,7 +835,7 @@ void render_frame(struct swaybar_output *output) {
wl_surface_damage(output->surface, 0, 0,
output->width, output->height);
uint32_t bg_alpha = ctx.background_color & 0xFF;
uint32_t bg_alpha = background_color & 0xFF;
if (bg_alpha == 0xFF) {
struct wl_region *region =
wl_compositor_create_region(output->bar->compositor);