/*
 * Copyright © 2004 David Reveman
 *
 * 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 not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior permission.
 * David Reveman makes no representations about the suitability of this
 * software for any purpose. It is provided "as is" without express or
 * implied warranty.
 *
 * DAVID REVEMAN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL DAVID REVEMAN 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.
 *
 * Based on glx code by David Reveman
 *
 * Contributors:
 *  Tor Lillqvist <tml@iki.fi>
 *  Vladimir Vukicevic <vladimir@pobox.com>
 *
 */

#ifdef HAVE_CONFIG_H
#  include "../config.h"
#endif

#include "glitz_wglint.h"

#include <stdio.h>
#include <ctype.h>

static glitz_extension_map wgl_extensions[] = {
    { 0.0, "WGL_ARB_pixel_format", GLITZ_WGL_FEATURE_PIXEL_FORMAT_MASK },
    { 0.0, "WGL_ARB_pbuffer", GLITZ_WGL_FEATURE_PBUFFER_MASK },
    { 0.0, "WGL_ARB_make_current_read",
      GLITZ_WGL_FEATURE_MAKE_CURRENT_READ_MASK },
    { 0.0, "WGL_ARB_multisample", GLITZ_WGL_FEATURE_MULTISAMPLE_MASK },
    { 0.0, NULL, 0 }
};

void
glitz_wgl_query_extensions (glitz_wgl_screen_info_t *screen_info,
			    glitz_gl_float_t        wgl_version)
{
    typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
    PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB;
    const char *wgl_extensions_string;

    wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
	wglGetProcAddress ("wglGetExtensionsStringARB");

    if (wglGetExtensionsStringARB == NULL)
	return;

    wgl_extensions_string = (*wglGetExtensionsStringARB) (screen_info->root_dc);

    screen_info->wgl_feature_mask =
	glitz_extensions_query (wgl_version,
				wgl_extensions_string,
				wgl_extensions);

    if (screen_info->wgl_feature_mask & GLITZ_WGL_FEATURE_MULTISAMPLE_MASK) {
	const char *renderer;

	renderer = glGetString (GL_RENDERER);
	if (renderer) {

	    /* nVIDIA's driver seem to support multisample with pbuffers (?) */
	    if (!strncmp ("GeForce", renderer, 7) ||
		!strncmp ("Quadro", renderer, 6))
		screen_info->wgl_feature_mask |=
		    GLITZ_WGL_FEATURE_PBUFFER_MULTISAMPLE_MASK;
	}
    }
}