shader.source.h

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#pragma once
 
#include "eu/core/vertex_layout.h"
 
namespace eu::render
{
 
// todo(Gustav): Should this be merged with the RenderSettings
struct ShaderOptions
{
    bool only_depth = false;
    bool use_blinn_phong = true;
    bool use_texture = false;
    bool use_lights = false;
 
    int number_of_point_lights = 0;
    int number_of_frustum_lights = 0;
    int number_of_directional_lights = 0;
 
    bool transparent_cutoff = false;
    [[nodiscard]] ShaderOptions with_transparent_cutoff() const;
 
    bool use_instancing = false;
    [[nodiscard]] ShaderOptions with_instanced_mat4() const;
};

struct ShaderSource_withLayout
{
    core::ShaderVertexAttributes layout;
    std::string vertex;
    std::string fragment;
};
 
// vertex and fragment shader source.
struct ShaderSource
{
    std::string vertex;
    std::string fragment;
};

enum class BlurType
{
    horizontal,
    vertical
};

enum class IsGauss
{
    no,
    yes
};

struct BlurOptions
{
    BlurType blur;
    int sample_count;
    IsGauss is_gauss;
};
 
std::string generate_blur(std::string_view src, const BlurOptions& options);
 
ShaderSource_withLayout load_shader_source(const ShaderSource& source, const ShaderOptions& options, const std::string& uniform_buffer_source);
 
ShaderSource load_skybox_source(const ShaderSource& source, const std::string& uniform_buffer_source);
 
}  //  namespace eu::render