#include <gearlib.h>

vec3 quad_vertex_positions[6] = {
    { -0.5f, 0.5f, 0.0f },
    { -0.5f, -0.5f, 0.0f },
    { 0.5f, -0.5f, 0.0f },
    
    { -0.5f, 0.5f, 0.0f },
    { 0.5f, -0.5f, 0.0f },
    { 0.5f, 0.5f, 0.0f },
};

void draw_rectangle(RenderBatch* batch, mat4 transform, vec4 color) {
    if(batch_needs_flush(batch, 6))
        flush_batch(batch);
    
    for(int i = 0; i < 6; i++) {
        QuadVertex* vertex = batch->vertex_ptr;

        vertex->Position = quad_vertex_positions[i];
        vertex->Color = color;

        batch->vertex_ptr += batch->vertex_size;
        batch->vertex_count++;
    }
}

void setup_quad() {
    RenderBatch* quad_batch = create_batch(sizeof(QuadVertex), MAX_VERTICES);
    quad_batch->shader = load_shader_program(
            compile_shader("assets/quad.vert", GL_VERTEX_SHADER),
            compile_shader("assets/quad.frag", GL_FRAGMENT_SHADER), 0);;
  
    batch_add_attrib(quad_batch, (VertexAttrib){ 
        .type = GL_FLOAT, .size = sizeof(float), .count = 3 
    }); // pos 
    
    batch_add_attrib(quad_batch, (VertexAttrib){ 
        .type = GL_FLOAT, .size = sizeof(float), .count = 4 
    }); // color

    batch_bind_attribs(quad_batch);
}