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polybar/include/utils/color.hpp

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feat(color_util): Utility functions for color handling
2016-10-30 20:21:24 -04:00
#pragma once
fix(color_util): Add missing header
2017-01-24 06:37:19 -05:00
#include <cstdlib>
feat(color_util): Utility functions for color handling
2016-10-30 20:21:24 -04:00
#include "common.hpp"
fix: project rename
2016-11-19 00:22:44 -05:00
POLYBAR_NS
feat(color_util): Utility functions for color handling
2016-10-30 20:21:24 -04:00
Make rgba class immutable
2020-11-27 14:35:31 -05:00
/**
* Represents immutable 32-bit color values.
*/
class rgba {
public:
enum color_type { NONE, ARGB, ALPHA_ONLY };
wip(refactor): Cairo drawing
2017-01-18 23:38:42 -05:00
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.
2019-10-27 17:06:25 -04:00
explicit rgba();
explicit rgba(uint32_t value, color_type type = ARGB);
explicit rgba(string hex);
operator string() const;
operator uint32_t() const;
bool operator==(const rgba& other) const;
Make rgba class immutable
2020-11-27 14:35:31 -05:00
uint32_t value() const;
color_type type() const;
refactor(color): Better channel function names (alpha|red|green|blue)_(d|i) are used for the four channels using doubles or integers, respectively.
2020-11-27 15:05:50 -05:00
double alpha_d() const;
double red_d() const;
double green_d() const;
double blue_d() const;
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.
2019-10-27 17:06:25 -04:00
refactor(color): Better channel function names (alpha|red|green|blue)_(d|i) are used for the four channels using doubles or integers, respectively.
2020-11-27 15:05:50 -05:00
uint8_t alpha_i() const;
uint8_t red_i() const;
uint8_t green_i() const;
uint8_t blue_i() const;
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.
2019-10-27 17:06:25 -04:00
bool has_color() const;
fix(builder): Properly apply alpha for fg and bg It was not quite clear how try_apply_alpha should behave if the given color was not ALPHA_ONLY. The implementation just returned 'this'. However, the build relied on it returning the given color. This broke all bg and fg settings in the entire bar. To clear this up, we switch this around take the alpha channel of 'this' and also return 'this' if it isn't ALPHA_ONLY. Fixes #2255
2020-12-01 08:49:41 -05:00
rgba apply_alpha_to(rgba other) const;
rgba try_apply_alpha_to(rgba other) const;
Make rgba class immutable
2020-11-27 14:35:31 -05:00
private:
/**
* Color value in the form ARGB or A000 depending on the type
*
* Cannot be const because we have to assign to it in the constructor and initializer lists are not possible.
*/
uint32_t m_value;
/**
* NONE marks this instance as invalid. If such a color is encountered, it
* should be treated as if no color was set.
*
* ALPHA_ONLY is used for color strings that only have an alpha channel (#AA)
* these kinds should be combined with another color that has RGB channels
* before they are used to render anything.
*
* Cannot be const because we have to assign to it in the constructor and initializer lists are not possible.
*/
color_type m_type{NONE};
wip(refactor): Cairo drawing
2017-01-18 23:38:42 -05:00
};
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.
2019-10-27 17:06:25 -04:00
namespace color_util {
string simplify_hex(string hex);
} // namespace color_util
fix: project rename
2016-11-19 00:22:44 -05:00
POLYBAR_NS_END
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