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#pragma once
#include <mbgl/gl/object.hpp>
#include <mbgl/util/optional.hpp>
#include <vector>
#include <unordered_map>
#include <memory>
namespace mbgl {
namespace gl {
class Context;
} // namespace gl
class LinePatternPos {
public:
float width;
float height;
float y;
};
enum class LinePatternCap : bool {
Square = false,
Round = true,
};
class LineAtlas {
public:
LineAtlas(uint16_t width, uint16_t height);
~LineAtlas();
// Binds the atlas texture to the GPU, and uploads data if it is out of date.
void bind(gl::Context&, gl::TextureUnit unit);
// Uploads the texture to the GPU to be available when we need it. This is a lazy operation;
// the texture is only bound when the data is out of date (=dirty).
void upload(gl::Context&, gl::TextureUnit unit);
LinePatternPos getDashPosition(const std::vector<float>&, LinePatternCap);
LinePatternPos addDash(const std::vector<float>& dasharray, LinePatternCap);
const uint16_t width;
const uint16_t height;
private:
const std::unique_ptr<char[]> data;
bool dirty;
mbgl::optional<gl::UniqueTexture> texture;
int nextRow = 0;
std::unordered_map<size_t, LinePatternPos> positions;
};
} // namespace mbgl
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