R2DShader.hpp

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#ifndef GALAXY_RESOURCE_EMBEDDED_R2DSHADER_HPP_
#define GALAXY_RESOURCE_EMBEDDED_R2DSHADER_HPP_
 
namespace galaxy
{
    namespace resource
    {
        constexpr const auto r2d_vert_shader = R"(
            #version 460 core
 
            precision highp int;
            precision highp float;
 
            layout(location = 0) in vec2 l_pos;
            layout(location = 1) in vec2 l_texels;
 
            layout(std430, binding = 0) readonly buffer camera_data
            {
                mat4 u_camera_model_view;
                mat4 u_camera_proj;
            };
 
            layout(std430, binding = 1) readonly buffer render_data
            {
                mat4 u_transform;
                vec4 u_colour;
                int u_entity;
                bool u_point;
                bool u_textured;
            };
 
            out vec2 io_texels;
    
            void main()
            {
                gl_Position =  u_camera_proj * u_camera_model_view * u_transform * vec4(l_pos, 0.0, 1.0);
 
                io_texels = l_texels;
                io_texels.y = 1.0 - io_texels.y;
 
                if (u_point)
                {
                    gl_PointSize = 4;
                }
            }
        )";
 
        constexpr const auto r2d_frag_shader = R"(
            #version 460 core
 
            precision highp int;
            precision highp float;
 
            layout(std430, binding = 0) readonly buffer camera_data
            {
                mat4 u_camera_model_view;
                mat4 u_camera_proj;
            };
 
            layout(std430, binding = 1) readonly buffer render_data
            {
                mat4 u_transform;
                vec4 u_colour;
                int u_entity;
                bool u_point;
                bool u_textured;
            };
 
            in vec2 io_texels;
 
            layout (location = 0) out vec4 io_frag_colour;
            layout (location = 1) out int io_entity;
 
            uniform sampler2D u_texture;
 
            void main()
            {
                if (u_textured)
                {
                    io_frag_colour = texture(u_texture, io_texels) * u_colour;
                }
                else
                {
                    io_frag_colour = u_colour;
                }
 
                io_entity = u_entity;
            }
        )";
    } // namespace resource
} // namespace galaxy
 
#endif