shader_material.h

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#pragma once
#include "core/gstl/str.h"
#include "servers/rendering/rendering_device.h"
 
using UniformType = std::variant<float, glm::vec2, glm::vec3, glm::vec4, int>;
 
class CanvasMaterial {
public:
    CanvasMaterial() = default;
 
    explicit CanvasMaterial(const RID shader_rid) : shader(shader_rid) {
    }
 
    CanvasMaterial& set_shader(RID shader_rid);
 
    CanvasMaterial& set_color(const Color& col);
 
    CanvasMaterial& set_texture(RID tex);
 
    CanvasMaterial& set_custom_texture(const char* name, RID tex);
 
    template<typename T>
    CanvasMaterial& set_shader_param(const char* uniform_name, const T& value);
 
    RID get_custom_texture(const char* uniform_name) const;
 
    RID get_shader() const;
 
    bool has_custom_shader() const;
 
    const HashMap<String, UniformType>& get_uniforms() const;
 
    const HashMap<String, RID>& get_custom_textures() const;
 
    Color get_color() const;
 
    RID  get_texture() const;
 
private:
 
    Color color = Color::WHITE;
    RID texture  = INVALID_RID;
 
    RID shader = INVALID_RID;
    HashMap<String, UniformType> uniforms;
    HashMap<String, RID> custom_textures;
};
 
 
template<typename T>
CanvasMaterial& CanvasMaterial::set_shader_param(const char* uniform_name, const T& value) {
    uniforms[uniform_name] = value;
    return *this;
}