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#pragma once
#include <mbgl/gl/primitives.hpp>
#include <mbgl/util/variant.hpp>
#include <cassert>
namespace mbgl {
namespace gl {
class Points {
public:
using Primitive = Point;
static constexpr std::size_t bufferGroupSize = 1;
explicit Points(float pointSize_) : pointSize(pointSize_) {}
float pointSize;
};
class Lines {
public:
using Primitive = Line;
static constexpr std::size_t bufferGroupSize = 2;
explicit Lines(float lineWidth_) : lineWidth(lineWidth_) {
assert(lineWidth > 0);
}
float lineWidth;
};
class LineStrip {
public:
// LineStrip is a form of "Line" rendering, but the element buffer
// cannot be grouped into logical elements beyond a single Point.
using Primitive = Line;
static constexpr std::size_t bufferGroupSize = 1;
explicit LineStrip(float lineWidth_) : lineWidth(lineWidth_) {
assert(lineWidth > 0);
}
float lineWidth;
};
class Triangles {
public:
using Primitive = Triangle;
static constexpr std::size_t bufferGroupSize = 3;
};
class TriangleStrip {
public:
// TriangleStrip is a form of "Triangle" rendering, but the element buffer
// cannot be grouped into logical elements beyond a single Point.
using Primitive = Triangle;
static constexpr std::size_t bufferGroupSize = 1;
};
// Special draw mode for use with VertexVector<Indexed, Vertex>, in which
// case the true draw mode is denoted by the IndexVector type.
class Indexed {
public:
static constexpr std::size_t bufferGroupSize = 1;
};
using DrawMode = variant<
Points,
Lines,
LineStrip,
Triangles,
TriangleStrip>;
} // namespace gl
} // namespace mbgl
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