// Copyright (C) 2013-2023 Valeriano Alfonso Rodriguez (Kableado)

#include <stdlib.h>
#include <string.h>

#include "QuadArray2D.h"

QuadArray2D QuadArray2D_Create(int resVertex) {
	QuadArray2D quadArray = NULL;

	quadArray = malloc(sizeof(TQuadArray2D));

	quadArray->vertexData = malloc(sizeof(float) * Vertex2D_Length * resVertex);
	quadArray->nVertex    = 0;
	quadArray->resVertex  = resVertex;

	return quadArray;
}

void QuadArray2D_Destroy(QuadArray2D *quadArray) {
	if (!quadArray) {
		return;
	}
	if (!quadArray[0]) {
		return;
	}

	free(quadArray[0]->vertexData);
	free(quadArray[0]);
	quadArray[0] = NULL;
}

void QuadArray2D_Clean(QuadArray2D quadArray) { quadArray->nVertex = 0; }

void QuadArray2D_AddVertex(QuadArray2D quadArray, float v[]) {
	if (quadArray->resVertex <= quadArray->nVertex) {
		// Grow vertexData
		quadArray->resVertex *= 2;
		float *newVertexData = malloc(sizeof(float) * Vertex2D_Length * quadArray->resVertex);
		memcpy(newVertexData, quadArray->vertexData, sizeof(float) * Vertex2D_Length * quadArray->nVertex);
		free(quadArray->vertexData);
		quadArray->vertexData = newVertexData;
	}

	// Add the vertex
	memcpy(quadArray->vertexData + (Vertex2D_Length * quadArray->nVertex), v, sizeof(float) * Vertex2D_Length);
	quadArray->nVertex++;
}

void QuadArray2D_AddQuad(
	QuadArray2D quadArray, float x0, float y0, float u0, float v0, float x1, float y1, float u1, float v1,
	const float color[]) {
	float v[Vertex2D_Length];

	// Set the color
	v[4] = color[0];
	v[5] = color[1];
	v[6] = color[2];
	v[7] = color[3];

	// Add the vertexes
	v[0] = x0;
	v[1] = y0;
	v[2] = u0;
	v[3] = v0;
	QuadArray2D_AddVertex(quadArray, v);
	v[0] = x1;
	v[1] = y0;
	v[2] = u1;
	v[3] = v0;
	QuadArray2D_AddVertex(quadArray, v);
	v[0] = x1;
	v[1] = y1;
	v[2] = u1;
	v[3] = v1;
	QuadArray2D_AddVertex(quadArray, v);

	v[0] = x1;
	v[1] = y1;
	v[2] = u1;
	v[3] = v1;
	QuadArray2D_AddVertex(quadArray, v);
	v[0] = x0;
	v[1] = y1;
	v[2] = u0;
	v[3] = v1;
	QuadArray2D_AddVertex(quadArray, v);
	v[0] = x0;
	v[1] = y0;
	v[2] = u0;
	v[3] = v0;
	QuadArray2D_AddVertex(quadArray, v);
}