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render: use output's subpixel mode when rasterizing glyphs

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Daniel Eklöf 2020-04-20 18:37:59 +02:00
parent 4ca6e760f2
commit 6f83ef81e5
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GPG key ID: 5BBD4992C116573F
5 changed files with 79 additions and 1 deletions
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72
terminal.c
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@ -579,6 +579,50 @@ get_font_dpi(const struct terminal *term)
return dpi;
}
static enum subpixel_order
get_font_subpixel(const struct terminal *term)
{
if (term->colors.alpha != 0xffff) {
/* Can't do subpixel rendering on transparent background */
return FCFT_SUBPIXEL_ORDER_NONE;
}
enum wl_output_subpixel wl_subpixel;
/*
* Wayland doesn't tell us *which* part of the surface that goes
* on a specific output, only whether the surface is mapped to an
* output or not.
*
* Thus, when determining which subpixel mode to use, we can't do
* much but select *an* output. So, we pick the first one.
*
* If we're not mapped at all, we pick the first available
* monitor, and hope that's where we'll eventually get mapped.
*
* If there aren't any monitors we use the "default" subpixel
* mode.
*/
if (tll_length(term->window->on_outputs) > 0)
wl_subpixel = tll_front(term->window->on_outputs)->subpixel;
else if (tll_length(term->wl->monitors) > 0)
wl_subpixel = tll_front(term->wl->monitors).subpixel;
else
wl_subpixel = WL_OUTPUT_SUBPIXEL_UNKNOWN;
switch (wl_subpixel) {
case WL_OUTPUT_SUBPIXEL_UNKNOWN: return FCFT_SUBPIXEL_ORDER_DEFAULT;
case WL_OUTPUT_SUBPIXEL_NONE: return FCFT_SUBPIXEL_ORDER_NONE;
case WL_OUTPUT_SUBPIXEL_HORIZONTAL_RGB: return FCFT_SUBPIXEL_ORDER_HORIZONTAL_RGB;
case WL_OUTPUT_SUBPIXEL_HORIZONTAL_BGR: return FCFT_SUBPIXEL_ORDER_HORIZONTAL_BGR;
case WL_OUTPUT_SUBPIXEL_VERTICAL_RGB: return FCFT_SUBPIXEL_ORDER_VERTICAL_RGB;
case WL_OUTPUT_SUBPIXEL_VERTICAL_BGR: return FCFT_SUBPIXEL_ORDER_VERTICAL_BGR;
}
return FCFT_SUBPIXEL_ORDER_DEFAULT;
}
static bool
load_fonts_from_conf(const struct terminal *term, const struct config *conf,
struct font *fonts[static 4])
@ -686,6 +730,9 @@ term_init(const struct config *conf, struct fdm *fdm, struct wayland *wayl,
.ptmx_buffer = tll_init(),
.font_dpi = 0,
.font_adjustments = 0,
.font_subpixel = (conf->colors.alpha == 0xffff /* Can't do subpixel rendering on transparent background */
? FCFT_SUBPIXEL_ORDER_DEFAULT
: FCFT_SUBPIXEL_ORDER_NONE),
.cursor_keys_mode = CURSOR_KEYS_NORMAL,
.keypad_keys_mode = KEYPAD_NUMERICAL,
.auto_margin = true,
@ -1331,6 +1378,31 @@ term_font_dpi_changed(struct terminal *term)
return false;
}
void
term_font_subpixel_changed(struct terminal *term)
{
enum subpixel_order subpixel = get_font_subpixel(term);
if (term->font_subpixel == subpixel)
return;
#if defined(_DEBUG) && LOG_ENABLE_DBG
static const char *const str[] = {
[FCFT_SUBPIXEL_ORDER_DEFAULT] = "default",
[FCFT_SUBPIXEL_ORDER_NONE] = "disabled",
[FCFT_SUBPIXEL_ORDER_HORIZONTAL_RGB] = "RGB",
[FCFT_SUBPIXEL_ORDER_HORIZONTAL_BGR] = "BGR",
[FCFT_SUBPIXEL_ORDER_VERTICAL_RGB] = "V-RGB",
[FCFT_SUBPIXEL_ORDER_VERTICAL_BGR] = "V-BGR",
};
#endif
LOG_DBG("subpixel mode changed: %s -> %s", str[term->font_subpixel], str[subpixel]);
term->font_subpixel = subpixel;
term_damage_view(term);
render_refresh(term);
}
void
term_damage_rows(struct terminal *term, int start, int end)
{