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/*
 * Copyright © 2004 David Reveman, Peter Nilsson
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the names of
 * David Reveman and Peter Nilsson not be used in advertising or
 * publicity pertaining to distribution of the software without
 * specific, written prior permission. David Reveman and Peter Nilsson
 * makes no representations about the suitability of this software for
 * any purpose. It is provided "as is" without express or implied warranty.
 *
 * DAVID REVEMAN AND PETER NILSSON DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DAVID REVEMAN AND
 * PETER NILSSON BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
 * OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors: David Reveman <c99drn@cs.umu.se>
 *          Peter Nilsson <c99pnn@cs.umu.se>
 */

#ifndef GLITZ_GLXINT_H_INCLUDED
#define GLITZ_GLXINT_H_INCLUDED

#include "glitzint.h"

#include "glitz-glx.h"

#include <GL/gl.h>
#include <GL/glx.h>

#include "glitz_glxext.h"

#define GLITZ_GLX_FEATURE_TEXTURE_RECTANGLE_MASK        (1L <<  0)
#define GLITZ_GLX_FEATURE_TEXTURE_NON_POWER_OF_TWO_MASK (1L <<  1)
#define GLITZ_GLX_FEATURE_TEXTURE_MIRRORED_REPEAT_MASK  (1L <<  2)
#define GLITZ_GLX_FEATURE_TEXTURE_BORDER_CLAMP_MASK     (1L <<  3)
#define GLITZ_GLX_FEATURE_MULTISAMPLE_MASK              (1L <<  4)
#define GLITZ_GLX_FEATURE_MULTISAMPLE_FILTER_HINT_MASK  (1L <<  5)
#define GLITZ_GLX_FEATURE_MULTITEXTURE_MASK             (1L <<  6)
#define GLITZ_GLX_FEATURE_TEXTURE_ENV_COMBINE_MASK      (1L <<  7)
#define GLITZ_GLX_FEATURE_TEXTURE_ENV_DOT3_MASK         (1L <<  8)
#define GLITZ_GLX_FEATURE_FRAGMENT_PROGRAM_MASK         (1L <<  9)
#define GLITZ_GLX_FEATURE_VERTEX_BUFFER_OBJECT_MASK     (1L << 10)
#define GLITZ_GLX_FEATURE_PIXEL_BUFFER_OBJECT_MASK      (1L << 11)
#define GLITZ_GLX_FEATURE_BLEND_COLOR_MASK              (1L << 12)
#define GLITZ_GLX_FEATURE_GLX_FBCONFIG_MASK             (1L << 13)
#define GLITZ_GLX_FEATURE_GLX_PBUFFER_MASK              (1L << 14)
#define GLITZ_GLX_FEATURE_GLX_MAKE_CURRENT_READ_MASK    (1L << 15)
#define GLITZ_GLX_FEATURE_GLX_GET_PROC_ADDRESS_MASK     (1L << 16)
#define GLITZ_GLX_FEATURE_GLX_MULTISAMPLE_MASK          (1L << 17)

typedef struct _glitz_glx_surface glitz_glx_surface_t;
typedef struct _glitz_glx_screen_info_t glitz_glx_screen_info_t;
typedef struct _glitz_glx_display_info_t glitz_glx_display_info_t;

typedef struct _glitz_glx_static_proc_address_list_t {
  glitz_glx_get_proc_address_t get_proc_address;
  glitz_glx_get_fbconfigs_t get_fbconfigs;
  glitz_glx_get_fbconfig_attrib_t get_fbconfig_attrib;
  glitz_glx_get_visual_from_fbconfig_t get_visual_from_fbconfig;
  glitz_glx_create_pbuffer_t create_pbuffer;
  glitz_glx_destroy_pbuffer_t destroy_pbuffer;
  glitz_glx_make_context_current_t make_context_current;
  glitz_glx_create_new_context_t create_new_context;
} glitz_glx_static_proc_address_list_t;

typedef struct _glitz_glx_thread_info_t {
  glitz_glx_display_info_t **displays;
  int n_displays;
  char *gl_library;
  void *dlhand;
} glitz_glx_thread_info_t;

struct _glitz_glx_display_info_t {
  glitz_glx_thread_info_t *thread_info;
  Display *display;
  glitz_glx_screen_info_t **screens;
  int n_screens;
};

typedef struct _glitz_glx_context_info_t {
  glitz_glx_surface_t *surface;
  glitz_constraint_t constraint;
} glitz_glx_context_info_t;

typedef struct _glitz_glx_context_t {
  GLXContext context;
  XID id;
  GLXFBConfig fbconfig;
  glitz_surface_backend_t backend;
  glitz_gl_int_t max_viewport_dims[2];
  glitz_gl_int_t max_texture_2d_size;
  glitz_gl_int_t max_texture_rect_size;
} glitz_glx_context_t;

struct _glitz_glx_screen_info_t {
  glitz_glx_display_info_t *display_info;
  int screen;

  glitz_format_t *formats;
  XID *format_ids;
  int n_formats;
  
  glitz_glx_context_t **contexts;
  int n_contexts;
  
  glitz_glx_context_info_t context_stack[GLITZ_CONTEXT_STACK_SIZE];
  int context_stack_size;
  
  glitz_glx_context_t root_context;
  GLXDrawable root_drawable;
  Colormap root_colormap;

  unsigned long feature_mask;
  unsigned long glx_feature_mask;
  glitz_gl_float_t gl_version;
  glitz_gl_float_t glx_version;

  glitz_glx_static_proc_address_list_t glx;

  glitz_program_map_t program_map;
};

struct _glitz_glx_surface {
  glitz_surface_t base;
  
  glitz_glx_screen_info_t *screen_info;
  glitz_glx_context_t *context;
  GLXDrawable drawable;
  GLXDrawable pbuffer;
};

extern glitz_status_t __internal_linkage
glitz_glx_query_extensions (glitz_glx_screen_info_t *screen_info);

extern glitz_glx_screen_info_t *__internal_linkage
glitz_glx_screen_info_get (Display *display,
                           int screen);

extern glitz_function_pointer_t __internal_linkage
glitz_glx_get_proc_address (glitz_glx_screen_info_t *screen_info,
                            const char *name);

extern glitz_glx_context_t *__internal_linkage
glitz_glx_context_get (glitz_glx_screen_info_t *screen_info,
                       glitz_format_t *format);

extern void __internal_linkage
glitz_glx_context_destroy (glitz_glx_screen_info_t *screen_info,
                           glitz_glx_context_t *context);

extern int __internal_linkage
glitz_glx_ensure_pbuffer_support (glitz_glx_screen_info_t *screen_info,
                                  XID fbconfigid);

extern glitz_glx_context_t *__internal_linkage
glitz_glx_context_get_default (glitz_glx_screen_info_t *screen_info);

extern void __internal_linkage
glitz_glx_context_make_current (glitz_glx_surface_t *surface,
                                GLXContext context,
                                glitz_bool_t flush);

extern glitz_glx_surface_t *__internal_linkage
glitz_glx_context_push_current (glitz_glx_surface_t *surface,
                                glitz_constraint_t constraint);

extern glitz_glx_surface_t *__internal_linkage
glitz_glx_context_pop_current (glitz_glx_surface_t *surface);

extern void __internal_linkage
glitz_glx_context_proc_address_lookup (glitz_glx_screen_info_t *screen_info,
                                       glitz_glx_context_t *context);

extern void __internal_linkage
glitz_glx_query_formats (glitz_glx_screen_info_t *screen_info);

extern GLXPbuffer __internal_linkage
glitz_glx_pbuffer_create (glitz_glx_screen_info_t *screen_info,
                          GLXFBConfig fbconfig,
                          glitz_texture_t *texture);

extern void __internal_linkage
glitz_glx_pbuffer_destroy (glitz_glx_screen_info_t *screen_info,
                           GLXPbuffer pbuffer);

extern void __internal_linkage
glitz_glx_surface_backend_init (glitz_surface_backend_t *backend);

/* Avoid unnecessary PLT entries.  */

slim_hidden_proto(glitz_glx_init)
slim_hidden_proto(glitz_glx_fini)
slim_hidden_proto(glitz_glx_find_format)
slim_hidden_proto(glitz_glx_find_standard_format)
slim_hidden_proto(glitz_glx_get_visual_info_from_format)
slim_hidden_proto(glitz_glx_surface_create)
slim_hidden_proto(glitz_glx_surface_create_for_window)

#endif /* GLITZ_GLXINT_H_INCLUDED */