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#ifndef MBGL_GEOMETRY_SPRITE_ATLAS
#define MBGL_GEOMETRY_SPRITE_ATLAS
#include <mbgl/geometry/binpack.hpp>
#include <string>
#include <map>
#include <mutex>
#include <atomic>
#include <set>
namespace mbgl {
class Sprite;
class SpritePosition;
class SpriteAtlas {
public:
typedef uint16_t dimension;
public:
// Add way to construct this from another SpriteAtlas (e.g. with another pixelRatio)
SpriteAtlas(dimension width, dimension height);
~SpriteAtlas();
// Changes the pixel ratio.
bool resize(float newRatio);
// Update uninitialized sprites in this atlas from the given sprite.
void update(const Sprite &sprite);
// Returns the coordinates of a square icon. The getter also *creates* new square icons in the
// atlas if they don't exist, but they'll be default-initialized with a a black circle.
Rect<dimension> getIcon(int size, const std::string &name);
// Returns the coordinates of an image that is sourced from the sprite image.
// This getter does not create images, as the dimension of the texture us unknown if the
// sprite is not yet loaded. Instead, it returns a 0/0/0/0 rect.
Rect<dimension> getImage(const std::string &name, const Sprite &sprite);
// Binds the image buffer of this sprite atlas to the GPU, and uploads data if it is out
// of date.
void bind(bool linear = false);
inline float getWidth() const { return width; }
inline float getHeight() const { return height; }
inline float getTextureWidth() const { return width * pixelRatio; }
inline float getTextureHeight() const { return height * pixelRatio; }
private:
void allocate();
Rect<SpriteAtlas::dimension> allocateImage(size_t width, size_t height);
void copy(const Rect<dimension> &dst, const SpritePosition &src, const Sprite &sprite);
public:
const dimension width = 0;
const dimension height = 0;
private:
std::mutex mtx;
float pixelRatio = 1.0f;
BinPack<dimension> bin;
std::map<std::string, Rect<dimension>> images;
std::set<std::string> uninitialized;
uint32_t *data = nullptr;
std::atomic<bool> dirty;
uint32_t texture = 0;
uint32_t filter = 0;
static const int buffer = 1;
};
};
#endif
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