#include <GLES/gl.h>

#include "matrix.h"

// Matrix Data
#define MATRIX_STACK_DEPTH 256
typedef struct {
    matrix_t stack[MATRIX_STACK_DEPTH];
    unsigned int i;
} matrix_stack_t;

// Position
typedef struct {
    GLfloat x;
    GLfloat y;
    GLfloat z;
} position_t;

// Color
typedef struct {
    GLfloat red;
    GLfloat green;
    GLfloat blue;
    GLfloat alpha;
} color_t;

// Array Pointer Storage
typedef struct {
    GLboolean enabled;
    GLint size;
    GLenum type;
    GLsizei stride;
    const void *pointer;
} array_pointer_t;

// Light
typedef struct {
    GLboolean enabled;
    position_t position;
    color_t diffuse;
} light_source_t;

// GL State
typedef struct {
    color_t color;
    position_t normal;
    GLboolean rescale_normal;
    struct {
        GLenum mode;
        matrix_stack_t model_view;
        matrix_stack_t projection;
        matrix_stack_t texture;
    } matrix_stacks;
    struct {
        array_pointer_t vertex;
        array_pointer_t color;
        array_pointer_t tex_coord;
        array_pointer_t normal;
    } array_pointers;
    GLboolean alpha_test;
    GLboolean texture_2d;
    struct {
        GLboolean enabled;
        GLfixed mode;
        color_t color;
        GLfloat start;
        GLfloat end;
    } fog;
    struct {
        GLboolean enabled;
        light_source_t light_sources[2];
        color_t ambient;
    } lighting;
    struct {
        GLboolean enabled;
        color_t color;
    } highlight_mode;
} gl_state_t;
extern gl_state_t gl_state;
void _init_gles_compatibility_layer_state();
void _init_gles_compatibility_matrix_stacks();