diff options
Diffstat (limited to 'src/openvic-simulation/types/Colour.hpp')
| -rw-r--r-- | src/openvic-simulation/types/Colour.hpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/openvic-simulation/types/Colour.hpp b/src/openvic-simulation/types/Colour.hpp index 01f3852..15c574f 100644 --- a/src/openvic-simulation/types/Colour.hpp +++ b/src/openvic-simulation/types/Colour.hpp @@ -7,30 +7,36 @@ #include <string> namespace OpenVic { - // Represents a 24-bit RGB integer OR a 32-bit ARGB integer + /* Colour represented by an unsigned integer, either 24-bit RGB or 32-bit ARGB. */ using colour_t = uint32_t; + /* When colour_t is used as an identifier, NULL_COLOUR is disallowed * and should be reserved as an error value. * When colour_t is used in a purely graphical context, NULL_COLOUR * should be allowed. */ - static constexpr colour_t NULL_COLOUR = 0, FULL_COLOUR = 0xFF, MAX_COLOUR_RGB = 0xFFFFFF; + static constexpr colour_t NULL_COLOUR = 0, FULL_COLOUR = 0xFF, + MAX_COLOUR_RGB = 0xFFFFFF, MAX_COLOUR_ARGB = 0xFFFFFFFF; + constexpr colour_t float_to_colour_byte(float f, float min = 0.0f, float max = 1.0f) { return static_cast<colour_t>(std::clamp(min + f * (max - min), min, max) * 255.0f); } + constexpr colour_t fraction_to_colour_byte(int n, int d, float min = 0.0f, float max = 1.0f) { return float_to_colour_byte(static_cast<float>(n) / static_cast<float>(d), min, max); } + constexpr colour_t float_to_alpha_value(float a) { return float_to_colour_byte(a) << 24; } + constexpr float colour_byte_to_float(colour_t colour) { return std::clamp(static_cast<float>(colour) / 255.0f, 0.0f, 1.0f); } - inline std::string colour_to_hex_string(colour_t colour) { + inline std::string colour_to_hex_string(colour_t colour, bool alpha = false) { std::ostringstream stream; - stream << std::hex << std::setfill('0') << std::setw(6) << colour; + stream << std::uppercase << std::hex << std::setfill('0') << std::setw(!alpha ? 6 : 8) << colour; return stream.str(); } } |