rename backend to core

core/internal/server/wayland/gamma.go

@@ -0,0 +1,88 @@
+package wayland
+
+import (
+	"math"
+
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/utils"
+)
+
+type GammaRamp struct {
+	Red   []uint16
+	Green []uint16
+	Blue  []uint16
+}
+
+func GenerateGammaRamp(size uint32, temp int, gamma float64) GammaRamp {
+	ramp := GammaRamp{
+		Red:   make([]uint16, size),
+		Green: make([]uint16, size),
+		Blue:  make([]uint16, size),
+	}
+
+	for i := uint32(0); i < size; i++ {
+		val := float64(i) / float64(size-1)
+
+		valGamma := math.Pow(val, 1.0/gamma)
+
+		r, g, b := temperatureToRGB(temp)
+
+		ramp.Red[i] = uint16(utils.Clamp(valGamma*r*65535.0, 0, 65535))
+		ramp.Green[i] = uint16(utils.Clamp(valGamma*g*65535.0, 0, 65535))
+		ramp.Blue[i] = uint16(utils.Clamp(valGamma*b*65535.0, 0, 65535))
+	}
+
+	return ramp
+}
+
+func GenerateIdentityRamp(size uint32) GammaRamp {
+	ramp := GammaRamp{
+		Red:   make([]uint16, size),
+		Green: make([]uint16, size),
+		Blue:  make([]uint16, size),
+	}
+
+	for i := uint32(0); i < size; i++ {
+		val := uint16((float64(i) / float64(size-1)) * 65535.0)
+		ramp.Red[i] = val
+		ramp.Green[i] = val
+		ramp.Blue[i] = val
+	}
+
+	return ramp
+}
+
+func temperatureToRGB(temp int) (float64, float64, float64) {
+	tempK := float64(temp) / 100.0
+
+	var r, g, b float64
+
+	if tempK <= 66 {
+		r = 1.0
+	} else {
+		r = tempK - 60
+		r = 329.698727446 * math.Pow(r, -0.1332047592)
+		r = utils.Clamp(r, 0, 255) / 255.0
+	}
+
+	if tempK <= 66 {
+		g = tempK
+		g = 99.4708025861*math.Log(g) - 161.1195681661
+		g = utils.Clamp(g, 0, 255) / 255.0
+	} else {
+		g = tempK - 60
+		g = 288.1221695283 * math.Pow(g, -0.0755148492)
+		g = utils.Clamp(g, 0, 255) / 255.0
+	}
+
+	if tempK >= 66 {
+		b = 1.0
+	} else if tempK <= 19 {
+		b = 0.0
+	} else {
+		b = tempK - 10
+		b = 138.5177312231*math.Log(b) - 305.0447927307
+		b = utils.Clamp(b, 0, 255) / 255.0
+	}
+
+	return r, g, b
+}