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#ifndef MBGL_GEOMETRY_GLYPH_ATLAS
#define MBGL_GEOMETRY_GLYPH_ATLAS
#include <mbgl/geometry/binpack.hpp>
#include <mbgl/text/glyph_store.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/platform/gl.hpp>
#include <string>
#include <set>
#include <map>
#include <mutex>
#include <atomic>
namespace mbgl {
class GlyphAtlas : public util::noncopyable {
public:
GlyphAtlas(uint16_t width, uint16_t height);
~GlyphAtlas();
void addGlyphs(uintptr_t tileUID,
const std::u32string& text,
const std::string& stackName,
const FontStack&,
GlyphPositions&);
void removeGlyphs(uintptr_t tileUID);
// Binds the atlas texture to the GPU, and uploads data if it is out of date.
void bind();
// 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// the texture is only bound when the data is out of date (=dirty).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();
const GLsizei width;
const GLsizei height;
private:
struct GlyphValue {
GlyphValue(const Rect<uint16_t>& rect_, uintptr_t id)
: rect(rect_), ids({ id }) {}
Rect<uint16_t> rect;
std::set<uintptr_t> ids;
};
Rect<uint16_t> addGlyph(uintptr_t tileID,
const std::string& stackName,
const SDFGlyph&);
std::mutex mtx;
BinPack<uint16_t> bin;
std::map<std::string, std::map<uint32_t, GlyphValue>> index;
const std::unique_ptr<uint8_t[]> data;
std::atomic<bool> dirty;
GLuint texture = 0;
};
} // namespace mbgl
#endif
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