Files
MapLibreParticleLab/include/llmr/style/properties.hpp
Konstantin Käfer 1538ebaf22 cascade styles
2014-01-27 17:21:48 +01:00

96 lines
1.9 KiB
C++

#ifndef LLMR_STYLE_PROPERTIES
#define LLMR_STYLE_PROPERTIES
#include <array>
#include <vector>
namespace llmr {
typedef std::array<float, 4> Color;
enum class Winding {
EvenOdd = 1,
NonZero = 2
};
// enum LineCap {
// Round = 1
// };
// enum LineJoin {
// Butt = 1,
// Bevel = 2
// };
enum class Property {
Null = 1,
Constant = 2,
Stops = 3
};
namespace functions {
float null(float z, const std::vector<float>&);
bool null(float z, const std::vector<bool>&);
float constant(float z, const std::vector<float>& values);
bool constant(float z, const std::vector<bool>& values);
}
template <typename T>
struct FunctionProperty {
typedef T (*fn)(float z, const std::vector<T>& values);
fn function;
std::vector<T> values;
inline FunctionProperty() : function(&functions::null) {}
inline FunctionProperty(T value) : function(&functions::constant), values(1, value) {}
inline T operator()(float z) const { return function(z, values); }
};
// StrokeClass is the information we parse from the stylesheet
struct StrokeClass {
FunctionProperty<bool> hidden;
FunctionProperty<float> width;
FunctionProperty<float> offset;
Color color = {{ 0, 0, 0, 1 }};
};
// StrokeProperties is the one we resolve this to.
struct StrokeProperties {
bool hidden = false;
float width = 0;
float offset = 0;
Color color = {{ 0, 0, 0, 1 }};
};
struct FillClass {
FunctionProperty<bool> hidden;
Winding winding = Winding::NonZero;
FunctionProperty<bool> antialias = true;
Color fill_color = {{ 0, 0, 0, 1 }};
Color stroke_color = {{ 0, 0, 0, std::numeric_limits<float>::infinity() }};
FunctionProperty<float> opacity = 1;
};
struct FillProperties {
bool hidden = false;
Winding winding = Winding::NonZero;
bool antialias = true;
Color fill_color = {{ 0, 0, 0, 1 }};
Color stroke_color = {{ 0, 0, 0, 1 }};
float opacity = 1.0;
};
}
#endif