resources.hpp

 
#ifndef OGLPLUS_EXAMPLE_RESOURCES_HPP // NOLINT(llvm-header-guard)
#define OGLPLUS_EXAMPLE_RESOURCES_HPP
 
#include <oglplus/gl.hpp>
#include <oglplus/gl_api.hpp>
 
#include <eagine/application/fwd.hpp>
#include <oglplus/shapes/drawing.hpp>
#include <vector>
 
namespace eagine::application {
class example;
//------------------------------------------------------------------------------
// programs
//------------------------------------------------------------------------------
class draw_program {
public:
    void init(example&);
    void set_projection(example&);
 
    void bind_position_location(example&, oglp::vertex_attrib_location);
 
    void use(example&);
 
private:
    oglp::owned_program_name _prog;
    oglp::uniform_location _camera_loc;
};
//------------------------------------------------------------------------------
class screen_program {
public:
    void init(example&);
 
    void bind_position_location(example&, oglp::vertex_attrib_location);
    void bind_tex_coord_location(example&, oglp::vertex_attrib_location);
 
    void set_screen_size(example&);
 
    void use(example&);
 
private:
    oglp::owned_program_name _prog;
    oglp::uniform_location _screen_size_loc;
    oglp::uniform_location _draw_tex_loc;
};
//------------------------------------------------------------------------------
// geometry
//------------------------------------------------------------------------------
class shape_geometry {
public:
    void init(example&);
    void draw(example&);
 
    static auto position_loc() noexcept {
        return oglp::vertex_attrib_location{0};
    }
 
private:
    const int count = 8;
 
    oglp::owned_vertex_array_name _vao;
 
    oglp::owned_buffer_name _positions;
    oglp::owned_buffer_name _indices;
 
    oglp::owned_buffer_name _offsets;
 
    std::vector<oglp::shape_draw_operation> _ops{};
};
//------------------------------------------------------------------------------
class screen_geometry {
public:
    void init(example&);
    void draw(example&);
 
    static auto position_loc() noexcept {
        return oglp::vertex_attrib_location{0};
    }
 
    static auto tex_coord_loc() noexcept {
        return oglp::vertex_attrib_location{1};
    }
 
private:
    oglp::owned_vertex_array_name _vao;
 
    oglp::owned_buffer_name _positions;
    oglp::owned_buffer_name _tex_coords;
 
    std::vector<oglp::shape_draw_operation> _ops{};
};
//------------------------------------------------------------------------------
// draw buffers
//------------------------------------------------------------------------------
class draw_buffers {
public:
    void init(example&);
    void resize(example&);
 
    void draw_offscreen(example&);
    void draw_onscreen(example&);
 
private:
    oglp::gl_types::sizei_type _width{0};
    oglp::gl_types::sizei_type _height{0};
    oglp::owned_texture_name _tex{};
    oglp::owned_renderbuffer_name _rbo{};
    oglp::owned_framebuffer_name _fbo{};
};
//------------------------------------------------------------------------------
} // namespace eagine::application
 
#endif