add mixbox for cpp

2026-03-19 22:49:41 +01:00 · 2022-09-21 05:02:58 +02:00
parent e63e30fc97
commit 6444064661
3 changed files with 56 additions and 0 deletions
--- a/cpp/mixbox.h
+++ b/cpp/mixbox.h
@@ -0,0 +1,89 @@
+// ==========================================================
+//  MIXBOX 2.0 (c) 2022 Secret Weapons. All rights reserved.
+//  License: Creative Commons Attribution-NonCommercial 4.0
+//  Authors: Sarka Sochorova and Ondrej Jamriska
+// ==========================================================
+//
+//   BASIC USAGE
+//
+//      mixbox_lerp(r1, g1, b1,          // 1st color
+//                  r2, g2, b2,          // 2nd color
+//                  t,                   // mixing ratio
+//                  &r, &g, &b);         // result
+//
+//   MULTI-COLOR MIXING
+//
+//      mixbox_latent z1, z2, z3, z_mix;
+//      mixbox_rgb_to_latent(r1, g1, b1, z1);
+//      mixbox_rgb_to_latent(r2, g2, b2, z2);
+//      mixbox_rgb_to_latent(r3, g3, b3, z3);
+//
+//      for (int i = 0; i < MIXBOX_LATENT_SIZE; i++) {
+//        // mix 30% of rgb1, 60% of rgb2, and 10% of rgb3
+//        z_mix[i] = 0.3f*z1[i] + 0.6f*z2[i] + 0.1f*z3[i];
+//      }
+//
+//      mixbox_latent_to_rgb(z_mix, &r, &g, &b);
+//
+//   PIGMENT COLORS
+//
+//      Cadmium Yellow                    254, 236,   0
+//      Hansa Yellow                      252, 211,   0
+//      Cadmium Orange                    255, 105,   0
+//      Cadmium Red                       255,  39,   2
+//      Quinacridone Magenta              128,   2,  46
+//      Cobalt Violet                      78,   0,  66
+//      Ultramarine Blue                   25,   0,  89
+//      Cobalt Blue                         0,  33, 133
+//      Phthalo Blue                       13,  27,  68
+//      Phthalo Green                       0,  60,  50
+//      Permanent Green                     7, 109,  22
+//      Sap Green                         107, 148,   4
+//      Burnt Sienna                      123,  72,   0
+//
+//   LICENSING
+//
+//      If you want to obtain commercial license, please
+//      contact us at: mixbox@scrtwpns.com
+//
+
+#ifndef MIXBOX_H_
+#define MIXBOX_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MIXBOX_LATENT_SIZE 7
+
+typedef float mixbox_latent[MIXBOX_LATENT_SIZE];
+
+void mixbox_lerp(unsigned char r1, unsigned char g1, unsigned char b1,
+                 unsigned char r2, unsigned char g2, unsigned char b2,
+                 float t,
+                 unsigned char* out_r, unsigned char* out_g, unsigned char* out_b);
+
+void mixbox_lerp_float(float r1, float g1, float b1,
+                       float r2, float g2, float b2,
+                       float t,
+                       float* out_r, float* out_g, float* out_b);
+
+void mixbox_lerp_linear_float(float r1, float g1, float b1,
+                              float r2, float g2, float b2,
+                              float t,
+                              float* out_r, float* out_g, float* out_b);
+
+void mixbox_rgb_to_latent(unsigned char r, unsigned char g, unsigned char b, mixbox_latent out_latent);
+void mixbox_latent_to_rgb(mixbox_latent latent, unsigned char* out_r, unsigned char* out_g, unsigned char* out_b);
+
+void mixbox_float_rgb_to_latent(float r, float g, float b, mixbox_latent out_latent);
+void mixbox_latent_to_float_rgb(mixbox_latent latent, float* out_r, float* out_g, float* out_b);
+
+void mixbox_linear_float_rgb_to_latent(float r, float g, float b, mixbox_latent out_latent);
+void mixbox_latent_to_linear_float_rgb(mixbox_latent latent, float* out_r, float* out_g, float* out_b);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif