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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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31
src/ftxui/dom/color.cpp
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@@ -19,9 +19,18 @@ class BgColor : public NodeDecorator {
: NodeDecorator(std::move(child)), color_(color) {}
void Render(Screen& screen) override {
for (int y = box_.y_min; y <= box_.y_max; ++y) {
for (int x = box_.x_min; x <= box_.x_max; ++x) {
screen.PixelAt(x, y).background_color = color_;
if (color_.IsOpaque()) {
for (int y = box_.y_min; y <= box_.y_max; ++y) {
for (int x = box_.x_min; x <= box_.x_max; ++x) {
screen.PixelAt(x, y).background_color = color_;
}
}
} else {
for (int y = box_.y_min; y <= box_.y_max; ++y) {
for (int x = box_.x_min; x <= box_.x_max; ++x) {
Color& color = screen.PixelAt(x, y).background_color;
color = Color::Blend(color, color_);
}
}
}
NodeDecorator::Render(screen);
@@ -36,9 +45,18 @@ class FgColor : public NodeDecorator {
: NodeDecorator(std::move(child)), color_(color) {}
void Render(Screen& screen) override {
for (int y = box_.y_min; y <= box_.y_max; ++y) {
for (int x = box_.x_min; x <= box_.x_max; ++x) {
screen.PixelAt(x, y).foreground_color = color_;
if (color_.IsOpaque()) {
for (int y = box_.y_min; y <= box_.y_max; ++y) {
for (int x = box_.x_min; x <= box_.x_max; ++x) {
screen.PixelAt(x, y).foreground_color = color_;
}
}
} else {
for (int y = box_.y_min; y <= box_.y_max; ++y) {
for (int x = box_.x_min; x <= box_.x_max; ++x) {
Color& color = screen.PixelAt(x, y).foreground_color;
color = Color::Blend(color, color_);
}
}
}
NodeDecorator::Render(screen);
@@ -46,6 +64,7 @@ class FgColor : public NodeDecorator {
Color color_;
};
} // namespace
/// @brief Set the foreground color of an element.