ref: d30e507270ab476011b69706ee60a550d55974a0
dir: /include/gfx/convert.hpp/
/* * This file is part of RGBDS. * * Copyright (c) 2022, Eldred Habert and RGBDS contributors. * * SPDX-License-Identifier: MIT */ #ifndef RGBDS_GFX_CONVERT_HPP #define RGBDS_GFX_CONVERT_HPP #include <assert.h> #include <stdint.h> #include "gfx/main.hpp" struct Rgba { uint8_t red; uint8_t green; uint8_t blue; uint8_t alpha; Rgba(uint8_t r, uint8_t g, uint8_t b, uint8_t a) : red(r), green(g), blue(b), alpha(a) {} Rgba(uint32_t rgba) : red(rgba), green(rgba >> 8), blue(rgba >> 16), alpha(rgba >> 24) {} operator uint32_t() const { auto shl = [](uint8_t val, unsigned shift) { return static_cast<uint32_t>(val) << shift; }; return shl(red, 0) | shl(green, 8) | shl(blue, 16) | shl(alpha, 24); } bool operator!=(Rgba const &other) const { return static_cast<uint32_t>(*this) != static_cast<uint32_t>(other); } bool isGray() const { return red == green && green == blue; } /** * CGB colors are RGB555, so we use bit 15 to signify that the color is transparent instead * Since the rest of the bits don't matter then, we return 0x8000 exactly. */ static constexpr uint16_t transparent = 0b1'00000'00000'00000; static constexpr uint8_t transparency_threshold = 5; // TODO: adjust this /** * Computes the equivalent CGB color, respects the color curve depending on options */ uint16_t cgbColor() const { if (alpha > 0xFF - transparency_threshold) return transparent; if (options.useColorCurve) { assert(!"TODO"); } else { return (red >> 3) | (green >> 3) << 5 | (blue >> 3) << 10; } } }; void process(); #endif /* RGBDS_GFX_CONVERT_HPP */