Program Listing for File slint_brush.h
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// Copyright © SixtyFPS GmbH <info@slint-ui.com>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
#pragma once
#include <string_view>
#include "slint_color.h"
#include "slint_brush_internal.h"
#include "slint_string.h"
namespace slint {
namespace private_api {
using cbindgen_private::types::GradientStop;
class LinearGradientBrush
{
public:
LinearGradientBrush() = default;
LinearGradientBrush(float angle, const GradientStop *firstStop, int stopCount)
: inner(make_linear_gradient(angle, firstStop, stopCount))
{
}
float angle() const
{
// The gradient's first stop is a fake stop to store the angle
return inner[0].position;
}
int stopCount() const { return int(inner.size()) - 1; }
const GradientStop *stopsBegin() const { return inner.begin() + 1; }
const GradientStop *stopsEnd() const { return inner.end(); }
private:
cbindgen_private::types::LinearGradientBrush inner;
friend class slint::Brush;
static SharedVector<private_api::GradientStop>
make_linear_gradient(float angle, const GradientStop *firstStop, int stopCount)
{
SharedVector<private_api::GradientStop> gradient;
gradient.push_back({ Color::from_argb_encoded(0).inner, angle });
for (int i = 0; i < stopCount; ++i, ++firstStop)
gradient.push_back(*firstStop);
return gradient;
}
};
class RadialGradientBrush
{
public:
RadialGradientBrush() = default;
RadialGradientBrush(const GradientStop *firstStop, int stopCount)
: inner(make_circle_gradient(firstStop, stopCount))
{
}
int stopCount() const { return int(inner.size()); }
const GradientStop *stopsBegin() const { return inner.begin(); }
const GradientStop *stopsEnd() const { return inner.end(); }
private:
cbindgen_private::types::RadialGradientBrush inner;
friend class slint::Brush;
static SharedVector<private_api::GradientStop>
make_circle_gradient(const GradientStop *firstStop, int stopCount)
{
SharedVector<private_api::GradientStop> gradient;
for (int i = 0; i < stopCount; ++i, ++firstStop)
gradient.push_back(*firstStop);
return gradient;
}
};
}
class Brush
{
public:
Brush() : Brush(Color {}) { }
Brush(const Color &color) : data(Inner::SolidColor(color.inner)) { }
Brush(const private_api::LinearGradientBrush &gradient)
: data(Inner::LinearGradient(gradient.inner))
{
}
Brush(const private_api::RadialGradientBrush &gradient)
: data(Inner::RadialGradient(gradient.inner))
{
}
inline Color color() const;
inline Brush brighter(float factor) const;
inline Brush darker(float factor) const;
friend bool operator==(const Brush &a, const Brush &b) { return a.data == b.data; }
friend bool operator!=(const Brush &a, const Brush &b) { return a.data != b.data; }
private:
using Tag = cbindgen_private::types::Brush::Tag;
using Inner = cbindgen_private::types::Brush;
Inner data;
};
Color Brush::color() const
{
Color result;
switch (data.tag) {
case Tag::SolidColor:
result.inner = data.solid_color._0;
break;
case Tag::LinearGradient:
if (data.linear_gradient._0.size() > 1) {
result.inner = data.linear_gradient._0[1].color;
}
break;
case Tag::RadialGradient:
if (data.radial_gradient._0.size() > 0) {
result.inner = data.radial_gradient._0[0].color;
}
break;
}
return result;
}
inline Brush Brush::brighter(float factor) const
{
Brush result = *this;
switch (data.tag) {
case Tag::SolidColor:
cbindgen_private::types::slint_color_brighter(&data.solid_color._0, factor,
&result.data.solid_color._0);
break;
case Tag::LinearGradient:
for (std::size_t i = 1; i < data.linear_gradient._0.size(); ++i) {
cbindgen_private::types::slint_color_brighter(&data.linear_gradient._0[i].color, factor,
&result.data.linear_gradient._0[i].color);
}
break;
case Tag::RadialGradient:
for (std::size_t i = 0; i < data.linear_gradient._0.size(); ++i) {
cbindgen_private::types::slint_color_brighter(&data.radial_gradient._0[i].color, factor,
&result.data.radial_gradient._0[i].color);
}
break;
}
return result;
}
inline Brush Brush::darker(float factor) const
{
Brush result = *this;
switch (data.tag) {
case Tag::SolidColor:
cbindgen_private::types::slint_color_darker(&data.solid_color._0, factor,
&result.data.solid_color._0);
break;
case Tag::LinearGradient:
for (std::size_t i = 1; i < data.linear_gradient._0.size(); ++i) {
cbindgen_private::types::slint_color_darker(&data.linear_gradient._0[i].color, factor,
&result.data.linear_gradient._0[i].color);
}
break;
case Tag::RadialGradient:
for (std::size_t i = 0; i < data.linear_gradient._0.size(); ++i) {
cbindgen_private::types::slint_color_darker(&data.radial_gradient._0[i].color, factor,
&result.data.radial_gradient._0[i].color);
}
break;
}
return result;
}
}