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TwatchChalice
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Color suitability based on gcolor_legible_over

This commit is contained in:
Neale Pickett 2016-06-03 09:01:38 -06:00
parent e8522d9b4b
commit d4c3fcd1e1
2 changed files with 4 additions and 16 deletions
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2
appinfo.json
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@ -36,7 +36,7 @@
"chalk" "chalk"
], ],
"uuid": "f00033b1-2e6c-490c-a650-99d9399b2163", "uuid": "f00033b1-2e6c-490c-a650-99d9399b2163",
"versionLabel": "1.4", "versionLabel": "1.5",
"watchapp": { "watchapp": {
"watchface": true "watchface": true
} }

18
src/main.c
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@ -25,23 +25,11 @@ GPoint center;
bool bt_connected; bool bt_connected;
static int32_t luminosity(GColor c) {
int r = (c.argb & 0b110000) >> 4;
int g = (c.argb & 0b001100) >> 2;
int b = (c.argb & 0b000011) >> 0;
return (2126 * r) + (7152 * g) + (722 * b);
}
static bool visible_against(GColor a, GColor b) { static bool visible_against(GColor a, GColor b) {
int32_t la = luminosity(a); GColor na = gcolor_legible_over(a);
int32_t lb = luminosity(b); GColor nb = gcolor_legible_over(b);
if ((la - lb > 15000) || (lb - la > 15000)) { return (! gcolor_equal(na, nb));
return true;
} else {
return false;
}
} }
static GPoint point_of_polar(int32_t theta, int r) { static GPoint point_of_polar(int32_t theta, int r) {