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#ifndef MBGL_GEOMETRY_SPRITE_ATLAS
#define MBGL_GEOMETRY_SPRITE_ATLAS
#include <mbgl/geometry/binpack.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/ptr.hpp>
#include <string>
#include <map>
#include <mutex>
#include <atomic>
#include <set>
#include <array>
namespace mbgl {
class Sprite;
class SpritePosition;
struct SpriteAtlasPosition {
inline SpriteAtlasPosition(const std::array<float, 2> size_ = {{0, 0}},
const std::array<float, 2> tl_ = {{0, 0}},
const std::array<float, 2> br_ = {{0, 0}})
: size(size_), tl(tl_), br(br_) {}
std::array<float, 2> size;
std::array<float, 2> tl;
std::array<float, 2> br;
};
class SpriteAtlas : public util::noncopyable {
public:
typedef uint16_t dimension;
// 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);
// Changes the source sprite.
void setSprite(util::ptr<Sprite> sprite);
// Returns the coordinates of an image that is sourced from the sprite image.
// This getter attempts to read the image from the sprite if it is already loaded.
// In that case, it copies it into the sprite atlas and returns the dimensions.
// Otherwise, it returns a 0/0/0/0 rect.
Rect<dimension> getImage(const std::string& name, const bool wrap);
SpriteAtlasPosition getPosition(const std::string& name, bool repeating = false);
// Binds the atlas texture to the GPU, and uploads data if it is out of date.
void bind(bool linear = false);
// 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// the texture is only bound when the data is out of date (=dirty).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();
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; }
inline float getPixelRatio() const { return pixelRatio; }
const dimension width = 0;
const dimension height = 0;
private:
void allocate();
Rect<SpriteAtlas::dimension> allocateImage(size_t width, size_t height);
void copy(const Rect<dimension>& dst, const SpritePosition& src, const bool wrap);
std::recursive_mutex mtx;
float pixelRatio = 1.0f;
BinPack<dimension> bin;
util::ptr<Sprite> sprite;
std::map<std::string, Rect<dimension>> images;
std::set<std::string> uninitialized;
std::unique_ptr<uint32_t[]> data;
std::atomic<bool> dirty;
bool fullUploadRequired = true;
uint32_t texture = 0;
uint32_t filter = 0;
static const int buffer = 1;
};
};
#endif
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