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#pragma once
#include <mbgl/gfx/texture.hpp>
#include <mbgl/util/image.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/util/variant.hpp>
#include <map>
#include <memory>
#include <vector>
namespace mbgl {
namespace gfx {
class UploadPass;
} // namespace gfx
class LinePatternPos {
public:
float width;
float height;
float y;
};
enum class LinePatternCap : bool {
Square = false,
Round = true,
};
class DashPatternTexture {
public:
DashPatternTexture(const std::vector<float>& from, const std::vector<float>& to, LinePatternCap);
// 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 uploaded for the first time.
void upload(gfx::UploadPass&);
// Binds the atlas texture to the GPU, and uploads data if it is out of date.
gfx::TextureBinding textureBinding() const;
// Returns the size of the texture image.
Size getSize() const;
const LinePatternPos& getFrom() const { return from; }
const LinePatternPos& getTo() const { return to; }
private:
LinePatternPos from, to;
variant<AlphaImage, gfx::Texture> texture;
};
class LineAtlas {
public:
LineAtlas();
~LineAtlas();
// Obtains or creates a texture that has both line patterns in it
DashPatternTexture& getDashPatternTexture(const std::vector<float>& from,
const std::vector<float>& to,
LinePatternCap);
// Uploads the textures to the GPU to be available when we need it.
void upload(gfx::UploadPass&);
private:
std::map<size_t, DashPatternTexture> textures;
// Stores a list of hashes of texture objcts that need uploading.
std::vector<size_t> needsUpload;
};
} // namespace mbgl
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