#include "TexturedBatch.h"

namespace charcoal
{
	namespace builtin
	{
		void TexturedBatch::preprender() const
		{
			glActiveTexture(GL_TEXTURE0);
			glBindTexture(GL_TEXTURE_2D, m_p_renderable->get_texture()->get_texture());
			glBindSampler(0, m_p_renderable->get_sampler()->get_sampler());
		}

		void TexturedBatch::setup_vao()
		{
			glBindBuffer(GL_ARRAY_BUFFER, m_vertex_vbo);
			glEnableVertexAttribArray(0);
			glEnableVertexAttribArray(1);
			glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(TexturedVertex), (void*)offsetof(TexturedVertex, position));
			glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(TexturedVertex), (void*)offsetof(TexturedVertex, uv));
			glBindBuffer(GL_ARRAY_BUFFER, m_element_buffers[0]);
			glEnableVertexAttribArray(2);
			glEnableVertexAttribArray(3);
			glEnableVertexAttribArray(4);
			glEnableVertexAttribArray(5);
			glVertexAttribPointer(2, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable), (void*)(0 * sizeof(vec4)));
			glVertexAttribPointer(3, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable), (void*)(1 * sizeof(vec4)));
			glVertexAttribPointer(4, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable), (void*)(2 * sizeof(vec4)));
			glVertexAttribPointer(5, 4, GL_FLOAT, GL_FALSE, sizeof(Poseable), (void*)(3 * sizeof(vec4)));

			glVertexAttribDivisor(0, 0); // Send the mesh data once
			glVertexAttribDivisor(1, 0); // Send the mesh data once
			glVertexAttribDivisor(2, 1); // Send the offset data for each instance drawn
			glVertexAttribDivisor(3, 1); // Send the offset data for each instance drawn
			glVertexAttribDivisor(4, 1); // Send the offset data for each instance drawn
			glVertexAttribDivisor(5, 1); // Send the offset data for each instance drawn
		}
	}
}