#include "pch.h"
#include "shape.hpp"

void Shape::create_buffers(GLvoid* idx, GLvoid* vertices, int isize, int vsize)
{
    glGenBuffers(2, buffers);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, isize, idx, GL_STATIC_DRAW);
    glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
    glBufferData(GL_ARRAY_BUFFER, vsize, vertices, GL_STATIC_DRAW);
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    
    glGenVertexArrays(2, arrays);
    
    for (int i = 0; i < 2; i++)
    {
        glBindVertexArray(arrays[i]);
        glEnableVertexAttribArray(0);
        glEnableVertexAttribArray(1);
        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buffers[1]);
        glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
        glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)0);
        glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(vertex_t), (GLvoid*)offsetof(vertex_t, uvs));
    }
    
    glBindVertexArray(0);
}
void Shape::draw_fill() const
{
    glBindVertexArray(arrays[0]);
    glDrawElements(GL_TRIANGLES, count[0], GL_UNSIGNED_SHORT, ioff[0]);
}
void Shape::draw_stroke() const
{
    glBindVertexArray(arrays[1]);
    glDrawElements(GL_LINES, count[1], GL_UNSIGNED_SHORT, ioff[1]);
}