gui_gl_render_target.hpp

#ifndef LXGUI_GUI_GL_RENDER_TARGET_HPP
#define LXGUI_GUI_GL_RENDER_TARGET_HPP
 
#include "lxgui/gui_matrix4.hpp"
#include "lxgui/gui_render_target.hpp"
#include "lxgui/impl/gui_gl_material.hpp"
#include "lxgui/utils.hpp"
 
#include <cstdint>
#include <memory>
 
namespace lxgui::gui::gl {
 
class render_target final : public gui::render_target {
public:
    render_target(const vector2ui& dimensions, material::filter filt = material::filter::none);
 
    ~render_target() override;
 
    void begin() override;
 
    void end() override;
 
    void clear(const color& c) override;
 
    bounds2f get_rect() const override;
 
    bool set_dimensions(const vector2ui& dimensions) override;
 
    vector2ui get_canvas_dimensions() const override;
 
    void save_to_file(std::string filename) const override;
 
    std::weak_ptr<gl::material> get_material();
 
    const matrix4f& get_view_matrix() const;
 
    static void check_availability();
 
private:
    static void save_rgba_to_png_(
        const std::string& filename, const color32* data, std::size_t width, std::size_t height);
 
    std::uint32_t                 fbo_handle_ = 0;
    std::shared_ptr<gl::material> texture_;
 
    matrix4f view_matrix_;
};
 
} // namespace lxgui::gui::gl
 
#endif