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config: add tweak.scaling-filter

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Use the new fcft_set_scaling_filter() API to use a non-default scaling
filter.

By default, we use lanczo3, the ‘best’ filter. This overrides the
default in fcft, which is ‘cubic’ filtering.
This commit is contained in:
Daniel Eklöf 2020-09-13 17:59:56 +02:00
parent 6a9725c7a6
commit 51a7e44fa2
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GPG key ID: 5BBD4992C116573F
6 changed files with 46 additions and 2 deletions
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30
config.c
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@ -1442,7 +1442,34 @@ parse_section_tweak(
const char *key, const char *value, struct config *conf,
const char *path, unsigned lineno)
{
if (strcmp(key, "allow-overflowing-double-width-glyphs") == 0) {
if (strcmp(key, "scaling-filter") == 0) {
static const struct {
const char *name;
enum fcft_scaling_filter filter;
} filters[] = {
{"none", FCFT_SCALING_FILTER_NONE},
{"nearest", FCFT_SCALING_FILTER_NEAREST},
{"bilinear", FCFT_SCALING_FILTER_BILINEAR},
{"cubic", FCFT_SCALING_FILTER_CUBIC},
{"lanczos3", FCFT_SCALING_FILTER_LANCZOS3},
};
for (size_t i = 0; i < ALEN(filters); i++) {
if (strcmp(value, filters[i].name) == 0) {
conf->tweak.fcft_filter = filters[i].filter;
LOG_WARN("tweak: scaling-filter=%s", filters[i].name);
return true;
}
}
LOG_AND_NOTIFY_ERR(
"%s:%d: [tweak]: %s: invalid 'scaling-filter' value, "
"expected one of 'none', 'nearest', 'bilinear', 'cubic' or "
"'lanczos3'", path, lineno, value);
return false;
}
else if (strcmp(key, "allow-overflowing-double-width-glyphs") == 0) {
conf->tweak.allow_overflowing_double_width_glyphs = str_to_bool(value);
if (conf->tweak.allow_overflowing_double_width_glyphs)
LOG_WARN("tweak: allow overflowing double-width glyphs");
@ -1894,6 +1921,7 @@ config_load(struct config *conf, const char *conf_path,
.hold_at_exit = false,
.tweak = {
.fcft_filter = FCFT_SCALING_FILTER_LANCZOS3,
.allow_overflowing_double_width_glyphs = false,
.delayed_render_lower_ns = 500000, /* 0.5ms */
.delayed_render_upper_ns = 16666666 / 2, /* half a frame period (60Hz) */