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[orx-color] Add ColorPhraseBook

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This commit is contained in:
Edwin Jakobs
2021-03-19 20:02:42 +01:00
parent 94722ba1f3
commit a664907e0f
2 changed files with 81 additions and 0 deletions
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2
orx-color/build.gradle
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@@ -9,6 +9,8 @@ sourceSets {
}
dependencies {
implementation(project(":orx-shader-phrases"))
demoImplementation(project(":orx-camera"))
demoImplementation(project(":orx-mesh-generators"))
demoImplementation("org.openrndr:openrndr-core:$openrndrVersion")

79
orx-color/src/main/kotlin/phrases/Phrases.kt Normal file
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@@ -0,0 +1,79 @@
package org.openrndr.extras.color.phrases
import org.openrndr.extra.shaderphrases.ShaderPhrase
import org.openrndr.extra.shaderphrases.ShaderPhraseBook
object ColorPhraseBook : ShaderPhraseBook("color") {
val phraseAtan2 = ShaderPhrase("""
|float atan2(in float y, in float x) {
| bool s = (abs(x) > abs(y));
| return mix(PI/2.0 - atan(x,y), atan(y,x), float(s));
|}""".trimMargin())
val phraseLinearRgbToOKLab = ShaderPhrase("""
|vec4 linear_rgb_to_oklab(vec4 c) {
| c.rgb = max(vec3(0.0), c.rgb);
| const mat3 kCONEtoLMS = mat3(
| 0.4122214708, 0.2119034982, 0.0883024619,
| 0.5363325363, 0.6806995451, 0.2817188376,
| 0.0514459929, 0.1073969566, 0.6299787005);
|
| const mat3 kRot = mat3(
| 0.2104542553, 1.9779984951, 0.0259040371,
| 0.7936177850, -2.4285922050, 0.7827717662,
| -0.0040720468, 0.4505937099, -0.8086757660);
| vec3 lms = pow(kCONEtoLMS * c.rgb, vec3(1.0/3.0));
| vec4 res = vec4((kRot) * lms, c.a);
| return res;
|}""".trimMargin())
val oklabToLinearRgb = ShaderPhrase("""
|vec4 oklab_to_linear_rgb(vec4 lab) {
| const mat3 kLMStoCONE = mat3(
| 1.0, 1.0, 1.0,
| 0.3963377774, -0.1055613458, -0.0894841775,
| 0.2158037573, -0.0638541728, -1.2914855480);
| const mat3 kRot = mat3(
| 4.0767416621, -1.2684380046, -0.0041960863,
| -3.3077115913, 2.6097574011, -0.7034186147,
| 0.2309699292, -0.3413193965, 1.7076147010);
| vec3 lms = kLMStoCONE * lab.rgb;
| lms = lms * lms * lms;
| vec4 res = vec4(kRot * lms,lab.a);
| return res;
|}""".trimMargin())
val phraseLabToLch = ShaderPhrase( """
|vec4 lab_to_lch(vec4 lab) {
| float r = length(lab.yz);
| float h = atan2(lab[2], lab[1]);
| return vec4(lab[0], c, h, lab.a);
|}""".trimMargin())
val phraseLchToLab = ShaderPhrase("""
|vec4 lch_to_lab(vec4 lch) {
| float a = lch[1] * cos(lch[2]);
| float b = lch[1] * sin(lch[2]);
| return vec4(lab[0], a, b, lab.a);
|}""".trimMargin())
val linearRgbToSRgb = ShaderPhrase("""
|vec4 linear_rgb_to_srgb(vec4 c) {
| const float t = 0.00313066844250063;
| return vec4(
| c.r <= t ? c.r * 12.92 : 1.055 * pow(c.r, 1 / 2.4) - 0.055,
| c.g <= t ? c.g * 12.92 : 1.055 * pow(c.g, 1 / 2.4) - 0.055,
| c.b <= t ? c.b * 12.92 : 1.055 * pow(c.b, 1 / 2.4) - 0.055,
| c.a);
|}""".trimMargin())
val phraseSRgbToLinearRgb = ShaderPhrase("""
|vec4 srgb_to_linear_rgb(vec4 c) {
| const float t = 0.0404482362771082;
| vec4(
| c.r <= t ? c.r / 12.92 : pow( (c.r + 0.055) / 1.055, 2.4),
| c.g <= t ? c.g / 12.92 : pow( (c.g + 0.055) / 1.055, 2.4),
| c.b <= t ? c.b / 12.92 : pow( (c.b + 0.055) / 1.055, 2.4),
| c.a);
|}""".trimMargin())
}