| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can |
| * be found in the LICENSE file. |
| * |
| */ |
| |
| // |
| // COLOR UTILITIES |
| // |
| |
| #pragma once |
| |
| // |
| // |
| // |
| |
| #include <stdint.h> |
| |
| // |
| // CONVERT FROM 0xAARRGGBB WORD ORDER INTO f32[4] |
| // |
| |
| void color_rgb32_to_rgba_f32(float rgba[4], const uint32_t rgb, const float opacity); |
| |
| void color_argb32_to_rgba_f32(float rgba[4], const uint32_t argb); |
| |
| // |
| // PREMULTIPLY |
| // |
| // { r, g, b, a } ==> { r*a, g*a, b*a, a } |
| // |
| |
| void color_premultiply_rgba_f32(float rgba[4]); |
| |
| // |
| // SRGB<>LINEAR |
| // |
| // EXT_framebuffer_sRGB: |
| // https://www.opengl.org/registry/specs/EXT/framebuffer_sRGB.txt |
| // |
| // { cs / 12.92, cs <= 0.04045 |
| // cl = { |
| // { ((cs + 0.055)/1.055)^2.4, cs > 0.04045 |
| // |
| // |
| // { 0.0, 0 <= cl |
| // { 12.92 * cl, 0 < cl < 0.0031308 |
| // cs = { 1.055 * cl^0.41666 - 0.055, 0.0031308 <= cl < 1 |
| // { 1.0, cl >= 1 |
| // |
| |
| void color_srgb_to_linear_rgb_f32(float rgb[3]); |
| |
| void color_linear_to_srgb_rgb_f32(float rgb[3]); |
| |
| // |
| // |
| // |
| |
| void color_linear_lerp_rgba_f32(float rgba_m[4], |
| float const rgba_a[4], |
| float const rgba_b[4], |
| float const t); |
| |
| // |
| // |
| // |
