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Color alpha support. (#884)

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This commit is contained in:
Arthur Sonzogni
2024-06-13 18:43:14 +02:00
committed by GitHub
parent d6a2049483
commit ff305147ca
8 changed files with 162 additions and 33 deletions
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10
include/ftxui/screen/color.hpp
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@@ -29,10 +29,16 @@ class Color {
Color(Palette16 index); // Implicit conversion from index to Color.
Color(Palette256 index); // Implicit conversion from index to Color.
// NOLINTEND
Color(uint8_t red, uint8_t green, uint8_t blue);
Color(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha = 255);
static Color RGB(uint8_t red, uint8_t green, uint8_t blue);
static Color HSV(uint8_t hue, uint8_t saturation, uint8_t value);
static Color RGBA(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha);
static Color HSVA(uint8_t hue,
uint8_t saturation,
uint8_t value,
uint8_t alpha);
static Color Interpolate(float t, const Color& a, const Color& b);
static Color Blend(const Color& lhs, const Color& rhs);
//---------------------------
// List of colors:
@@ -310,6 +316,7 @@ class Color {
bool operator!=(const Color& rhs) const;
std::string Print(bool is_background_color) const;
bool IsOpaque() const { return alpha_ == 255; }
private:
enum class ColorType : uint8_t {
@@ -322,6 +329,7 @@ class Color {
uint8_t red_ = 0;
uint8_t green_ = 0;
uint8_t blue_ = 0;
uint8_t alpha_ = 0;
};
inline namespace literals {

2
include/ftxui/screen/pixel.hpp
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@@ -38,7 +38,7 @@ struct Pixel {
// The graphemes stored into the pixel. To support combining characters,
// like: a?, this can potentially contain multiple codepoints.
std::string character = " ";
std::string character = "";
// Colors:
Color background_color = Color::Default;