diff options
Diffstat (limited to '')
| -rw-r--r-- | bouncer/richtext.cpp | 51 |
1 files changed, 48 insertions, 3 deletions
diff --git a/bouncer/richtext.cpp b/bouncer/richtext.cpp index 2deebda..396f666 100644 --- a/bouncer/richtext.cpp +++ b/bouncer/richtext.cpp @@ -177,15 +177,60 @@ const char *RichTextBuilder::c_str() { +inline static float hslValue(float n1, float n2, float hue) { + if (hue > 6.0f) + hue -= 6.0f; + else if (hue < 0.0f) + hue += 6.0f; + + if (hue < 1.0f) + return n1 + (n2 - n1) * hue; + else if (hue < 3.0f) + return n2; + else if (hue < 4.0f) + return n1 + (n2 - n1) * (4.0f - hue); + else + return n1; +} + +void calculateHSL(float h, float s, float l, uint8_t *r, uint8_t *g, uint8_t *b) { + // make it RGB + + if (s == 0) { + *r = *g = *b = l*255.0f; + } else { + float m1, m2; + if (l <= 0.5f) + m2 = l * (1.0f + s); + else + m2 = l + s - l * s; + + m1 = 2.0f * s - m2; + + *r = hslValue(m1, m2, h * 6.0f + 2.0) * 255.0f; + *g = hslValue(m1, m2, h * 6.0f) * 255.0f; + *b = hslValue(m1, m2, h * 6.0f - 2.0) * 255.0f; + } +} + + + void RichTextBuilder::appendNick(const char *nick) { uint32_t hash = 0; const char *c = nick; while (*c) hash = (hash * 17) + *(c++); - int r = ((hash & 0xFF0000) >> 16); - int g = ((hash & 0xFF00) >> 8); - int b = (hash & 0xFF); + int hueBase = ((hash & 0xFF0000) >> 16); + int satBase = ((hash & 0xFF00) >> 8); + int lumBase = (hash & 0xFF); + uint8_t r, g, b; + + calculateHSL( + hueBase / 255.0f, + (0.50f + (satBase / 765.0f)), + (0.40f + (lumBase / 1020.0f)), + &r, &g, &b); foreground(COL_LEVEL_NICK, r, g, b); append(nick); |