#include "zgl.h"
#include <assert.h>
#include <stdio.h>

#define VERTEX_ARRAY   0x0001
#define COLOR_ARRAY    0x0002
#define NORMAL_ARRAY   0x0004
#define TEXCOORD_ARRAY 0x0008

void
glopArrayElement(GLContext *c, GLParam *param)
{
  int i;
  int states = c->client_states;
  int idx = param[1].i;
    
  if (states & COLOR_ARRAY) {
    GLParam p[5];
    int size = c->color_array_size; 
    i = idx * (size + c->color_array_stride);
    p[1].f = c->color_array[i];
    p[2].f = c->color_array[i+1];
    p[3].f = c->color_array[i+2];
    p[4].f = size > 3 ? c->color_array[i+3] : 1.0f;
    glopColor(c, p);  
  }
  if (states & NORMAL_ARRAY) {
    i = idx * (3 + c->normal_array_stride);
    c->current_normal.X = c->normal_array[i];
    c->current_normal.Y = c->normal_array[i+1];
    c->current_normal.Z = c->normal_array[i+2];
    c->current_normal.Z = 0.0f;
  }
  if (states & TEXCOORD_ARRAY) {
    int size = c->texcoord_array_size;
    i = idx * (size + c->texcoord_array_stride);
    c->current_tex_coord.X = c->texcoord_array[i];
    c->current_tex_coord.Y = c->texcoord_array[i+1];
    c->current_tex_coord.Z = size > 2 ? c->texcoord_array[i+2] : 0.0f;
    c->current_tex_coord.W = size > 3 ? c->texcoord_array[i+3] : 1.0f;
  }
  if (states & VERTEX_ARRAY) {
    GLParam p[5];
    int size = c->vertex_array_size;
    i = idx * (size + c->vertex_array_stride);
    p[1].f = c->vertex_array[i];
    p[2].f = c->vertex_array[i+1];
    p[3].f = size > 2 ? c->vertex_array[i+2] : 0.0f;
    p[4].f = size > 3 ? c->vertex_array[i+3] : 1.0f;
    glopVertex(c, p);
  }
}

void
glArrayElement(GLint i)
{
  GLParam p[2];
  p[0].op = OP_ArrayElement;
  p[1].i = i;
  gl_add_op(p);
}


void
glopEnableClientState(GLContext *c, GLParam *p)
{
  c->client_states |= p[1].i;
}

void 
glEnableClientState(GLenum array)
{
  GLParam p[2];
  p[0].op = OP_EnableClientState;
  
  switch(array) {
  case GL_VERTEX_ARRAY:
    p[1].i = VERTEX_ARRAY;
    break;  
  case GL_NORMAL_ARRAY:
    p[1].i = NORMAL_ARRAY;
    break;
  case GL_COLOR_ARRAY:
    p[1].i = COLOR_ARRAY;
    break;
  case GL_TEXTURE_COORD_ARRAY:
    p[1].i = TEXCOORD_ARRAY;
    break;
  default:
    assert(0);
    break;
  }
  gl_add_op(p);
}

void
glopDisableClientState(GLContext *c, GLParam *p)
{
  c->client_states &= p[1].i;
}

void
glDisableClientState(GLenum array)
{
  GLParam p[2];
  p[0].op = OP_DisableClientState;
    
  switch(array) {
  case GL_VERTEX_ARRAY:
    p[1].i = ~VERTEX_ARRAY;
    break;  
  case GL_NORMAL_ARRAY:
    p[1].i = ~NORMAL_ARRAY;
    break;
  case GL_COLOR_ARRAY:
    p[1].i = ~COLOR_ARRAY;
    break;
  case GL_TEXTURE_COORD_ARRAY:
    p[1].i = ~TEXCOORD_ARRAY;
    break;
  default:
    assert(0);
    break;
  }
  gl_add_op(p);
}

void
glopVertexPointer(GLContext *c, GLParam *p)
{
  c->vertex_array_size = p[1].i;
  c->vertex_array_stride = p[2].i;
  c->vertex_array = p[3].p;
}

void 
glVertexPointer(GLint size, GLenum type, GLsizei stride, 
                const GLvoid *pointer)
{
  GLParam p[4];
  assert(type == GL_FLOAT);
  p[0].op = OP_VertexPointer;
  p[1].i = size;
  p[2].i = stride;
  p[3].p = (void*)pointer;
  gl_add_op(p);
}

void
glopColorPointer(GLContext *c, GLParam *p)
{
  c->color_array_size = p[1].i;
  c->color_array_stride = p[2].i;
  c->color_array = p[3].p;  
}

void 
glColorPointer(GLint size, GLenum type, GLsizei stride, 
               const GLvoid *pointer)
{
  GLParam p[4];
  assert(type == GL_FLOAT);
  p[0].op = OP_ColorPointer;
  p[1].i = size;
  p[2].i = stride;
  p[3].p = (void*)pointer;
  gl_add_op(p);
}

void
glopNormalPointer(GLContext *c, GLParam *p)
{
  c->normal_array_stride = p[1].i;
  c->normal_array = p[2].p;  
}

void 
glNormalPointer(GLenum type, GLsizei stride, 
                const GLvoid *pointer)
{
  GLParam p[3];
  assert(type == GL_FLOAT);
  p[0].op = OP_NormalPointer;
  p[1].i = stride;
  p[2].p = (void*)pointer;
}

void
glopTexCoordPointer(GLContext *c, GLParam *p)
{
  c->texcoord_array_size = p[1].i;
  c->texcoord_array_stride = p[2].i;
  c->texcoord_array = p[3].p;
}

void 
glTexCoordPointer(GLint size, GLenum type, GLsizei stride, 
                  const GLvoid *pointer)
{
  GLParam p[4];
  assert(type == GL_FLOAT);
  p[0].op = OP_TexCoordPointer;
  p[1].i = size;
  p[2].i = stride;
  p[3].p = (void*)pointer;
}
