src/platform/opengl/opengl_vertex_array.cpp


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#include <glad/glad.h>
#include "opengl_vertex_array.h"
#include "rendering/vertex_buffer.h"
#include "rendering/index_buffer.h"

namespace Donut
{
    OpenGLVertexArray::OpenGLVertexArray() 
    {
        glCreateVertexArrays(1, &m_renderer_id);
    }

    OpenGLVertexArray::~OpenGLVertexArray() 
    {
        glDeleteVertexArrays(1, &m_renderer_id);
    }

    void OpenGLVertexArray::bind() const 
    {
        glBindVertexArray(m_renderer_id);
    }

    void OpenGLVertexArray::unbind() const 
    {
        glBindVertexArray(0);
    }

    void OpenGLVertexArray::add_vertex_buffer(const std::shared_ptr<VertexBuffer>& vertex_buffer) 
    {
        glBindVertexArray(m_renderer_id);
        vertex_buffer->bind();

        const auto& layout = vertex_buffer->get_layout();
        for (const auto& element : layout.get_elements()) 
        {
            glEnableVertexAttribArray(m_vertex_buffer_index);
            glVertexAttribPointer(m_vertex_buffer_index,
                element.count,
                element.type,
                element.normalized ? GL_TRUE : GL_FALSE,
                layout.get_stride(),
                (const void*)element.offset);
            m_vertex_buffer_index++;
        }

        m_vertex_buffers.push_back(vertex_buffer);
    }

    void OpenGLVertexArray::set_index_buffer(const std::shared_ptr<IndexBuffer>& index_buffer) 
    {
        glBindVertexArray(m_renderer_id);
        index_buffer->bind();
        m_index_buffer = index_buffer;
    }
};