Move most color_util functions into rgba class
The intent is for every color to be stored in a rgba instance The rgba class now stores the color in a 32 bit integer to save space This also removes the unused class rgb and moves everything else into a cpp file. Many functions also had weird template parameters. For example alpha_channel<unsigned short int> would give a 2 byte number with the alpha channel byte in both bytes. color_util::hex would return a hex string with alpha channel if unsigned short int was given and without if unsigned char was given. Even more curiously those parameters were passed to *_channel and the result nevertheless truncated to 8bits.
This commit is contained in:
patrick96
Patrick Ziegler
parent
75eb41f5ad
commit
b238ec3403
@ -7,159 +7,47 @@
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POLYBAR_NS
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POLYBAR_NS
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static cache<string, unsigned int> g_cache_hex;
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static cache<string, uint32_t> g_cache_hex;
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static cache<unsigned int, string> g_cache_colors;
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struct rgba;
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namespace color_util {
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template <typename T = unsigned char>
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T alpha_channel(const unsigned int value) {
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unsigned char a = value >> 24;
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if (std::is_same<T, unsigned char>::value)
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return a << 8 / 0xff;
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else if (std::is_same<T, unsigned short int>::value)
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return a << 8 | a << 8 / 0xff;
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}
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template <typename T = unsigned char>
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T red_channel(const unsigned int value) {
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unsigned char r = value >> 16;
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if (std::is_same<T, unsigned char>::value)
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return r << 8 / 0xff;
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else if (std::is_same<T, unsigned short int>::value)
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return r << 8 | r << 8 / 0xff;
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}
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template <typename T = unsigned char>
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T green_channel(const unsigned int value) {
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unsigned char g = value >> 8;
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if (std::is_same<T, unsigned char>::value)
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return g << 8 / 0xff;
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else if (std::is_same<T, unsigned short int>::value)
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return g << 8 | g << 8 / 0xff;
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}
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template <typename T = unsigned char>
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T blue_channel(const unsigned int value) {
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unsigned char b = value;
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if (std::is_same<T, unsigned char>::value)
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return b << 8 / 0xff;
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else if (std::is_same<T, unsigned short int>::value)
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return b << 8 | b << 8 / 0xff;
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}
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template <typename T = unsigned int>
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unsigned int premultiply_alpha(const T value) {
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auto a = color_util::alpha_channel(value);
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auto r = color_util::red_channel(value) * a / 255;
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auto g = color_util::green_channel(value) * a / 255;
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auto b = color_util::blue_channel(value) * a / 255;
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return (a << 24) | (r << 16) | (g << 8) | b;
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}
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template <typename T>
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string hex(unsigned int color) {
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return *g_cache_hex.object(color, [&] {
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char s[12];
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size_t len = 0;
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unsigned char a = alpha_channel<T>(color);
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unsigned char r = red_channel<T>(color);
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unsigned char g = green_channel<T>(color);
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unsigned char b = blue_channel<T>(color);
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if (std::is_same<T, unsigned short int>::value) {
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len = snprintf(s, sizeof(s), "#%02x%02x%02x%02x", a, r, g, b);
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} else if (std::is_same<T, unsigned char>::value) {
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len = snprintf(s, sizeof(s), "#%02x%02x%02x", r, g, b);
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}
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return string(s, len);
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}());
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}
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inline string parse_hex(string hex) {
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if (hex[0] != '#')
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hex.insert(0, 1, '#');
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if (hex.length() == 4)
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hex = {'#', hex[1], hex[1], hex[2], hex[2], hex[3], hex[3]};
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if (hex.length() == 7)
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hex = "#ff" + hex.substr(1);
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if (hex.length() != 9)
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return "";
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return hex;
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}
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inline unsigned int parse(string hex, unsigned int fallback = 0) {
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if ((hex = parse_hex(hex)).empty())
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return fallback;
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return std::strtoul(&hex[1], nullptr, 16);
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}
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inline string simplify_hex(string hex) {
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// convert #ffrrggbb to #rrggbb
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if (hex.length() == 9 && std::toupper(hex[1]) == 'F' && std::toupper(hex[2]) == 'F') {
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hex.erase(1, 2);
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}
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// convert #rrggbb to #rgb
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if (hex.length() == 7) {
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if (hex[1] == hex[2] && hex[3] == hex[4] && hex[5] == hex[6]) {
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hex = {'#', hex[1], hex[3], hex[5]};
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}
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}
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return hex;
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}
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}
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struct rgb {
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double r;
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double g;
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double b;
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// clang-format off
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explicit rgb(double r, double g, double b) : r(r), g(g), b(b) {}
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explicit rgb(unsigned int color) : rgb(
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color_util::red_channel<unsigned char>(color_util::premultiply_alpha(color)) / 255.0,
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color_util::green_channel<unsigned char>(color_util::premultiply_alpha(color)) / 255.0,
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color_util::blue_channel<unsigned char>(color_util::premultiply_alpha(color)) / 255.0) {}
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// clang-format on
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operator unsigned int() {
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// clang-format off
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return 0xFF << 24
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| static_cast<int>(r * 255) << 16
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| static_cast<int>(g * 255) << 8
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| static_cast<int>(b * 255);
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// clang-format on
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}
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};
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struct rgba {
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struct rgba {
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double r;
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/**
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double g;
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* Color value in the form ARGB or A000 depending on the type
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double b;
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*/
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double a;
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uint32_t m_value;
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// clang-format off
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enum color_type { NONE, ARGB, ALPHA_ONLY } m_type{NONE};
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explicit rgba(double r, double g, double b, double a) : r(r), g(g), b(b), a(a) {}
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explicit rgba(unsigned int color) : rgba(
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color_util::red_channel<unsigned char>(color) / 255.0,
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color_util::green_channel<unsigned char>(color) / 255.0,
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color_util::blue_channel<unsigned char>(color) / 255.0,
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color_util::alpha_channel<unsigned char>(color) / 255.0) {}
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// clang-format on
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operator unsigned int() {
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explicit rgba();
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// clang-format off
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explicit rgba(uint32_t value, color_type type = ARGB);
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return static_cast<int>(a * 255) << 24
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explicit rgba(string hex);
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| static_cast<int>(r * 255) << 16
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| static_cast<int>(g * 255) << 8
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operator string() const;
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| static_cast<int>(b * 255);
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operator uint32_t() const;
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// clang-format on
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bool operator==(const rgba& other) const;
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}
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double a() const;
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double r() const;
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double g() const;
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double b() const;
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uint8_t a_int() const;
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uint8_t r_int() const;
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uint8_t g_int() const;
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uint8_t b_int() const;
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bool has_color() const;
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};
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};
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namespace color_util {
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uint8_t alpha_channel(const uint32_t value);
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uint8_t red_channel(const uint32_t value);
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uint8_t green_channel(const uint32_t value);
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uint8_t blue_channel(const uint32_t value);
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string hex(uint32_t color);
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string simplify_hex(string hex);
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} // namespace color_util
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POLYBAR_NS_END
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POLYBAR_NS_END
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174
src/utils/color.cpp
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174
src/utils/color.cpp
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@ -0,0 +1,174 @@
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#include "utils/color.hpp"
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POLYBAR_NS
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/**
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* Takes a hex string as input and brings it into a normalized form
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*
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* The input can either be only an alpha channel #AA
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* or any of these forms: #RGB, #ARGB, #RRGGBB, #AARRGGBB
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*
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* Colors without alpha channel will get an alpha channel of FF
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* The input does not have to start with '#'
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*
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* \returns Empty string for malformed input, either AA for the alpha only
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* input or an 8 character string of the expanded form AARRGGBB
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*/
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static string normalize_hex(string hex) {
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if (hex.length() == 0) {
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return "";
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}
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// We remove the hash because it makes processing easier
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if (hex[0] == '#') {
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hex.erase(0, 1);
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}
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if (hex.length() == 2) {
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// We only have an alpha channel
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return hex;
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}
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if (hex.length() == 3) {
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// RGB -> ARGB
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hex.insert(0, 1, 'f');
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}
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if (hex.length() == 4) {
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// ARGB -> AARRGGBB
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hex = {hex[0], hex[0], hex[1], hex[1], hex[2], hex[2], hex[3], hex[3]};
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}
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if (hex.length() == 6) {
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// RRGGBB -> FFRRGGBB
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hex.insert(0, 2, 'f');
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}
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if (hex.length() != 8) {
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return "";
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}
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return hex;
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}
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rgba::rgba() : m_value(0), m_type(NONE) {}
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rgba::rgba(uint32_t value, color_type type) : m_value(value), m_type(type) {}
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rgba::rgba(string hex) {
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hex = normalize_hex(hex);
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if (hex.length() == 0) {
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// TODO we need a way to inform the user that their color was malformed
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m_value = 0;
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m_type = NONE;
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} else if (hex.length() == 2) {
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m_value = std::strtoul(hex.c_str(), nullptr, 16) << 24;
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m_type = ALPHA_ONLY;
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} else {
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m_value = std::strtoul(hex.c_str(), nullptr, 16);
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m_type = ARGB;
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}
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}
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rgba::operator string() const {
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char s[10];
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size_t len = 0;
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len = snprintf(s, 10, "#%08x", m_value);
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return string(s, len);
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}
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bool rgba::operator==(const rgba& other) const {
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if (m_type != other.m_type) {
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return false;
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}
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switch (m_type) {
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case NONE:
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return true;
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case ARGB:
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return m_value == other.m_value;
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case ALPHA_ONLY:
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return a_int() == other.a_int();
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default:
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return false;
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}
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}
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rgba::operator uint32_t() const {
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return m_value;
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}
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double rgba::a() const {
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return a_int() / 255.0;
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}
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double rgba::r() const {
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return r_int() / 255.0;
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}
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double rgba::g() const {
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return g_int() / 255.0;
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}
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double rgba::b() const {
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return b_int() / 255.0;
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}
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uint8_t rgba::a_int() const {
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return color_util::alpha_channel(m_value);
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}
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uint8_t rgba::r_int() const {
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return color_util::red_channel(m_value);
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}
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uint8_t rgba::g_int() const {
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return color_util::green_channel(m_value);
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}
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uint8_t rgba::b_int() const {
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return color_util::blue_channel(m_value);
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}
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uint8_t color_util::alpha_channel(const uint32_t value) {
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return (value >> 24) & 0xFF;
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}
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uint8_t color_util::red_channel(const uint32_t value) {
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return (value >> 16) & 0xFF;
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}
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uint8_t color_util::green_channel(const uint32_t value) {
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return (value >> 8) & 0xFF;
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}
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uint8_t color_util::blue_channel(const uint32_t value) {
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return value & 0xFF;
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}
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string color_util::hex(uint32_t color) {
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return *g_cache_hex.object(color, [&] { return static_cast<string>(rgba{color}); }());
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}
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bool rgba::has_color() const {
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return m_type != NONE;
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}
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string color_util::simplify_hex(string hex) {
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// convert #ffrrggbb to #rrggbb
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if (hex.length() == 9 && std::toupper(hex[1]) == 'F' && std::toupper(hex[2]) == 'F') {
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hex.erase(1, 2);
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}
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// convert #rrggbb to #rgb
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if (hex.length() == 7) {
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if (hex[1] == hex[2] && hex[3] == hex[4] && hex[5] == hex[6]) {
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hex = {'#', hex[1], hex[3], hex[5]};
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}
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}
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return hex;
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}
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POLYBAR_NS_END
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@ -1,68 +1,129 @@
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#include "common/test.hpp"
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#include "utils/color.hpp"
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#include "utils/color.hpp"
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#include "common/test.hpp"
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using namespace polybar;
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using namespace polybar;
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TEST(String, rgb) {
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TEST(Rgba, constructor) {
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unsigned int color{0x123456};
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rgba v{"invalid"};
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EXPECT_EQ(0, color_util::alpha_channel<unsigned char>(color));
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EXPECT_FALSE(v.has_color());
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EXPECT_EQ(0x12, color_util::red_channel<unsigned char>(color));
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EXPECT_EQ(0x34, color_util::green_channel<unsigned char>(color));
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EXPECT_EQ(0x3434, color_util::green_channel<unsigned short int>(color));
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EXPECT_EQ(0x56, color_util::blue_channel<unsigned char>(color));
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EXPECT_TRUE(0x33 / 255.0 == rgb{0xFF112233}.b);
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v = rgba{"#f"};
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EXPECT_TRUE(0x51 / 255.0 == rgb{0x88449933}.g);
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EXPECT_FALSE(v.has_color());
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EXPECT_TRUE(0xff0f0f0f == rgb{0xee111111});
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||||||
EXPECT_TRUE(0xff0a141e == rgb{0x99112233});
|
v = rgba{"#12"};
|
||||||
|
EXPECT_EQ(rgba::ALPHA_ONLY, v.m_type);
|
||||||
|
|
||||||
|
v = rgba{"#ff"};
|
||||||
|
EXPECT_EQ(0xff000000, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#fff"};
|
||||||
|
EXPECT_EQ(0xffffffff, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#890"};
|
||||||
|
EXPECT_EQ(0xFF889900, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#a890"};
|
||||||
|
EXPECT_EQ(0xaa889900, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#55888777"};
|
||||||
|
EXPECT_EQ(0x55888777, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#88aaaaaa"};
|
||||||
|
EXPECT_EQ(0x88aaaaaa, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#00aaaaaa"};
|
||||||
|
EXPECT_EQ(0x00aaaaaa, v.m_value);
|
||||||
|
|
||||||
|
v = rgba{"#00FFFFFF"};
|
||||||
|
EXPECT_EQ(0x00FFFFFF, v.m_value);
|
||||||
}
|
}
|
||||||
|
|
||||||
TEST(String, rgba) {
|
TEST(Rgba, parse) {
|
||||||
unsigned int color{0xCC123456};
|
EXPECT_EQ(0xffffffff, rgba{"#fff"}.m_value);
|
||||||
EXPECT_EQ(0xCCCC, color_util::alpha_channel<unsigned short int>(color));
|
EXPECT_EQ(0xffffffff, rgba{"fff"}.m_value);
|
||||||
EXPECT_EQ(0x1212, color_util::red_channel<unsigned short int>(color));
|
EXPECT_EQ(0xff112233, rgba{"#123"}.m_value);
|
||||||
EXPECT_EQ(0x12, color_util::red_channel<unsigned char>(color));
|
EXPECT_EQ(0xff112233, rgba{"123"}.m_value);
|
||||||
EXPECT_EQ(0x3434, color_util::green_channel<unsigned short int>(color));
|
EXPECT_EQ(0xff888888, rgba{"#888888"}.m_value);
|
||||||
EXPECT_EQ(0x5656, color_util::blue_channel<unsigned short int>(color));
|
EXPECT_EQ(0xff888888, rgba{"888888"}.m_value);
|
||||||
|
EXPECT_EQ(0x00aa00aa, rgba{"#00aa00aa"}.m_value);
|
||||||
EXPECT_EQ(0xCC / 255.0, rgba{0xCC112233}.a);
|
EXPECT_EQ(0x00aa00aa, rgba{"00aa00aa"}.m_value);
|
||||||
EXPECT_EQ(0x99 / 255.0, rgba{0x88449933}.g);
|
EXPECT_EQ(0x11223344, rgba{"#1234"}.m_value);
|
||||||
EXPECT_EQ(0xFF111111, static_cast<unsigned int>(rgba{0xFF111111}));
|
EXPECT_EQ(0x11223344, rgba{"1234"}.m_value);
|
||||||
EXPECT_EQ(0x00FFFFFF, static_cast<unsigned int>(rgba{0x00FFFFFF}));
|
EXPECT_EQ(0xaa000000, rgba{"#aa"}.m_value);
|
||||||
|
EXPECT_EQ(0xaa000000, rgba{"aa"}.m_value);
|
||||||
}
|
}
|
||||||
|
|
||||||
TEST(String, hex) {
|
TEST(Rgba, string) {
|
||||||
unsigned int colorA{0x123456};
|
rgba v{"#1234"};
|
||||||
EXPECT_EQ("#123456"s, color_util::hex<unsigned char>(colorA));
|
|
||||||
unsigned int colorB{0xCC123456};
|
EXPECT_EQ("#11223344", static_cast<string>(v));
|
||||||
EXPECT_EQ("#cc123456"s, color_util::hex<unsigned short int>(colorB));
|
|
||||||
unsigned int colorC{0x00ffffff};
|
v = rgba{"#12"};
|
||||||
EXPECT_EQ("#00ffffff"s, color_util::hex<unsigned short int>(colorC));
|
|
||||||
|
EXPECT_EQ("#12000000", static_cast<string>(v));
|
||||||
}
|
}
|
||||||
|
|
||||||
TEST(String, parseHex) {
|
TEST(Rgba, eq) {
|
||||||
EXPECT_EQ("#ffffffff", color_util::parse_hex("#fff"));
|
rgba v(0x12, rgba::NONE);
|
||||||
EXPECT_EQ("#ff112233", color_util::parse_hex("#123"));
|
|
||||||
EXPECT_EQ("#ff888888", color_util::parse_hex("#888888"));
|
EXPECT_TRUE(v == rgba(0, rgba::NONE));
|
||||||
EXPECT_EQ("#00aa00aa", color_util::parse_hex("#00aa00aa"));
|
EXPECT_TRUE(v == rgba(0x11, rgba::NONE));
|
||||||
|
EXPECT_FALSE(v == rgba{0x1234});
|
||||||
|
|
||||||
|
v = rgba{0xCC123456};
|
||||||
|
|
||||||
|
EXPECT_TRUE(v == rgba{0xCC123456});
|
||||||
|
EXPECT_FALSE(v == rgba(0xCC123456, rgba::NONE));
|
||||||
|
|
||||||
|
v = rgba{"#aa"};
|
||||||
|
|
||||||
|
EXPECT_TRUE(v == rgba(0xaa000000, rgba::ALPHA_ONLY));
|
||||||
|
EXPECT_FALSE(v == rgba(0xaa000000, rgba::ARGB));
|
||||||
|
EXPECT_FALSE(v == rgba(0xab000000, rgba::ALPHA_ONLY));
|
||||||
}
|
}
|
||||||
|
|
||||||
TEST(String, parse) {
|
TEST(Rgba, hasColor) {
|
||||||
EXPECT_EQ(0, color_util::parse("invalid"));
|
rgba v{"#"};
|
||||||
EXPECT_EQ(0, color_util::parse("#f"));
|
|
||||||
EXPECT_EQ(0, color_util::parse("#ff"));
|
EXPECT_FALSE(v.has_color());
|
||||||
EXPECT_EQ(0xFF999999, color_util::parse("invalid", 0xFF999999));
|
|
||||||
EXPECT_EQ(0x00111111, color_util::parse("invalid", 0x00111111));
|
v = rgba{"#ff"};
|
||||||
EXPECT_EQ(0xFF000000, color_util::parse("invalid", 0xFF000000));
|
|
||||||
EXPECT_EQ(0xffffffff, color_util::parse("#fff"));
|
EXPECT_TRUE(v.has_color());
|
||||||
EXPECT_EQ(0xFF889900, color_util::parse("#890"));
|
|
||||||
EXPECT_EQ(0x55888777, color_util::parse("#55888777"));
|
v = rgba{"#cc123456"};
|
||||||
EXPECT_EQ(0x88aaaaaa, color_util::parse("#88aaaaaa"));
|
|
||||||
EXPECT_EQ(0x00aaaaaa, color_util::parse("#00aaaaaa"));
|
EXPECT_TRUE(v.has_color());
|
||||||
EXPECT_EQ(0x00FFFFFF, color_util::parse("#00FFFFFF"));
|
|
||||||
|
v = rgba(0x1243, rgba::NONE);
|
||||||
|
|
||||||
|
EXPECT_FALSE(v.has_color());
|
||||||
}
|
}
|
||||||
|
|
||||||
TEST(String, simplify) {
|
TEST(ColorUtil, rgba) {
|
||||||
|
uint32_t color{0xCC123456};
|
||||||
|
EXPECT_EQ(0xCC, color_util::alpha_channel(color));
|
||||||
|
EXPECT_EQ(0x12, color_util::red_channel(color));
|
||||||
|
EXPECT_EQ(0x34, color_util::green_channel(color));
|
||||||
|
EXPECT_EQ(0x56, color_util::blue_channel(color));
|
||||||
|
|
||||||
|
EXPECT_EQ(0xCC / 255.0, rgba{0xCC112233}.a());
|
||||||
|
EXPECT_EQ(0x99 / 255.0, rgba{0x88449933}.g());
|
||||||
|
EXPECT_EQ(0xFF111111, static_cast<uint32_t>(rgba{"#FF111111"}));
|
||||||
|
EXPECT_EQ(0x00FFFFFF, static_cast<uint32_t>(rgba{"#00FFFFFF"}));
|
||||||
|
}
|
||||||
|
|
||||||
|
TEST(ColorUtil, hex) {
|
||||||
|
uint32_t colorA{0x123456};
|
||||||
|
EXPECT_EQ("#00123456"s, color_util::hex(colorA));
|
||||||
|
uint32_t colorB{0xCC123456};
|
||||||
|
EXPECT_EQ("#cc123456"s, color_util::hex(colorB));
|
||||||
|
uint32_t colorC{0x00ffffff};
|
||||||
|
EXPECT_EQ("#00ffffff"s, color_util::hex(colorC));
|
||||||
|
}
|
||||||
|
|
||||||
|
TEST(ColorUtil, simplify) {
|
||||||
EXPECT_EQ("#111", color_util::simplify_hex("#FF111111"));
|
EXPECT_EQ("#111", color_util::simplify_hex("#FF111111"));
|
||||||
EXPECT_EQ("#234", color_util::simplify_hex("#ff223344"));
|
EXPECT_EQ("#234", color_util::simplify_hex("#ff223344"));
|
||||||
EXPECT_EQ("#ee223344", color_util::simplify_hex("#ee223344"));
|
EXPECT_EQ("#ee223344", color_util::simplify_hex("#ee223344"));
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user