EvpackShader.h

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#pragma once
 
#include <array>
#include <memory>
#include <span>
#include "common/BorrowedRef.h"
#include "common/Export.h"
#include "common/ResourceRef.h"
 
namespace eve::asset {
class EvpackResourceReader;
struct EvpackCapabilities;
struct ShaderAsset;
}  // namespace eve::asset
namespace eve::graphics {
class Graphics;
class Mesh;
class Texture;
}  // namespace eve::graphics
namespace eve::asset_graphics {
class EVENGINE_API_WORLD EvpackShader final {
public:
    ~EvpackShader();
    EvpackShader(const EvpackShader&)            = delete;
    EvpackShader& operator=(const EvpackShader&) = delete;
    [[nodiscard]] static Result<std::unique_ptr<EvpackShader>> load(const asset::EvpackResourceReader& reader,
                                                                    const AssetRef&                    asset,
                                                                    const asset::EvpackCapabilities&   capabilities,
                                                                    graphics::Graphics&                graphics);
    [[nodiscard]] const asset::ShaderAsset& definition() const noexcept;
    [[nodiscard]] Result<void> setParameter(std::string_view name, std::span<const float> values);
    [[nodiscard]] Result<void> drawMesh(graphics::Mesh& mesh, const std::array<float, 16>& transform,
                                        OptionalRef<graphics::Texture> texture, const std::array<float, 4>& tint);
    [[nodiscard]] Result<void> drawSprite(OptionalRef<graphics::Texture> texture, const std::array<float, 4>& rect,
                                          const std::array<float, 4>& tint);
    [[nodiscard]] Result<void> release();
 
private:
    struct Impl;
    explicit EvpackShader(std::unique_ptr<Impl> impl);
    std::unique_ptr<Impl> impl_;
};
}  // namespace eve::asset_graphics