Program Listing for File ShaderProgram.ixx

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module;

#include <string>
#include <string_view>
#include <glad/glad.h>
#include <glm/vec3.hpp>
#include <glm/mat4x4.hpp>

export module kataglyphis.opengl.shader_program;

export class ShaderProgram
{
  public:
    ShaderProgram();

    ShaderProgram(const ShaderProgram &) = default;

    void create_from_files(const char *vertex_location, const char *fragment_location);
    void create_from_files(const char *vertex_location, const char *geometry_location, const char *fragment_location);

    void create_computer_shader_program_from_file(const char *compute_location);

    bool setUniformVec3(glm::vec3 uniform, const std::string &shaderUniformName);
    bool setUniformFloat(GLfloat uniform, const std::string &shaderUniformName);
    bool setUniformInt(GLint uniform, const std::string &shaderUniformName);
    bool setUniformMatrix4fv(glm::mat4 matrix, const std::string &shaderUniformName);
    bool setUniformBlockBinding(GLuint block_binding, const std::string &shaderUniformName) const;

    GLuint get_id() const;

    void use_shader_program() const;

    void validate_program() const;

    ~ShaderProgram();

  protected:
    std::string shader_base_dir;
    GLuint program_id;
    bool program_is_linked{ false };

    // the file locations from our shaders
    const char *vertex_location;
    const char *fragment_location;
    const char *geometry_location;
    const char *compute_location;

    static void add_shader(GLuint program, const char *shader_code, GLenum shader_type);

    void compile_shader_program(const char *vertex_code, const char *fragment_code);
    void compile_shader_program(const char *vertex_code, const char *geometry_code, const char *fragment_code);

    void compile_compute_shader_program(const char *compute_code);
    void compile_program();

    static bool validateUniformLocation(GLint uniformLocation);
    GLuint getUniformLocation(const std::string &shaderUniformName, bool &validity);

    void clear_shader_program();
};