PipelineImage_Image.hpp

// Copyright 2019 Pokitec
// All rights reserved.
 
#pragma once
 
#include "TTauri/Foundation/vspan.hpp"
#include "TTauri/Foundation/ivec.hpp"
#include "TTauri/Foundation/iaarect.hpp"
#include "TTauri/Foundation/vec.hpp"
#include "TTauri/Foundation/aarect.hpp"
#include "TTauri/Foundation/mat.hpp"
#include "TTauri/GUI/PipelineImage_Page.hpp"
#include <nonstd/span>
#include <atomic>
#include <string>
 
namespace tt {
 
template<typename T> struct PixelMap;
class R16G16B16A16SFloat;
};
 
namespace tt::PipelineImage {
 
struct Vertex;
struct ImageLocation;
struct DeviceShared;
 
struct Image {
    enum class State { Uninitialized, Drawing, Uploaded };
 
    mutable std::atomic<State> state = State::Uninitialized;
 
    DeviceShared *parent;
 
    ivec extent;
 
    ivec pageExtent;
 
    std::vector<Page> pages;
 
    Image() noexcept :
        parent(nullptr), extent(), pageExtent(), pages() {}
 
    Image(DeviceShared *parent, ivec extent, ivec pageExtent, std::vector<Page> &&pages) noexcept :
        parent(parent),
        extent(extent),
        pageExtent(pageExtent),
        pages(std::move(pages)) {}
 
    Image(Image &&other) noexcept;
    Image &operator=(Image &&other) noexcept;
    ~Image();
 
    Image(Image const &other) = delete;
    Image &operator=(Image const &other) = delete;
 
    iaarect indexToRect(int const pageIndex) const noexcept;
 
    void placeVertices(vspan<Vertex> &vertices, mat transform, aarect clippingRectangle);
 
    void upload(PixelMap<R16G16B16A16SFloat> const &image) noexcept;
 
private:
    std::vector<std::tuple<vec, vec, bool>> tmpVertexPositions;
 
    void calculateVertexPositions(mat transform, aarect clippingRectangle);
 
    void placePageVertices(vspan<Vertex> &vertices, int const index, aarect clippingRectangle) const;
 
};
 
}