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/*
Copyright (C) 1997-2001 Id Software, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "client.h"
#include "glimp.h"
#include "wgl.h"
void (APIENTRY * qwglDrawBuffer)(GLenum mode);
const GLubyte * (APIENTRY * qwglGetString)(GLenum name);
int (WINAPI * qwglChoosePixelFormat)(HDC, CONST PIXELFORMATDESCRIPTOR *);
int (WINAPI * qwglDescribePixelFormat)(HDC, int, UINT, LPPIXELFORMATDESCRIPTOR);
BOOL (WINAPI * qwglSetPixelFormat)(HDC, int, CONST PIXELFORMATDESCRIPTOR *);
BOOL (WINAPI * qwglSwapBuffers)(HDC);
HGLRC (WINAPI * qwglCreateContext)(HDC);
BOOL (WINAPI * qwglDeleteContext)(HGLRC);
PROC (WINAPI * qwglGetProcAddress)(LPCSTR);
BOOL (WINAPI * qwglMakeCurrent)(HDC, HGLRC);
const char * (WINAPI * qwglGetExtensionsStringARB)(HDC hdc);
BOOL (WINAPI * qwglChoosePixelFormatARB)(HDC, const int *, const FLOAT *, UINT, int *, UINT *);
BOOL (WINAPI * qwglSwapIntervalEXT)(int interval);
void WGL_Shutdown(void)
{
if (glw.hinstOpenGL) {
FreeLibrary(glw.hinstOpenGL);
glw.hinstOpenGL = NULL;
}
qwglDrawBuffer = NULL;
qwglGetString = NULL;
qwglChoosePixelFormat = NULL;
qwglDescribePixelFormat = NULL;
qwglSetPixelFormat = NULL;
qwglSwapBuffers = NULL;
qwglCreateContext = NULL;
qwglDeleteContext = NULL;
qwglGetProcAddress = NULL;
qwglMakeCurrent = NULL;
WGL_ShutdownExtensions(~0);
}
#define GPA(x) (void *)GetProcAddress(glw.hinstOpenGL, x);
qboolean WGL_Init(const char *dllname)
{
if ((glw.hinstOpenGL = LoadLibrary(dllname)) == NULL) {
return qfalse;
}
qwglDrawBuffer = GPA("glDrawBuffer");
qwglGetString = GPA("glGetString");
qwglChoosePixelFormat = GPA("wglChoosePixelFormat");
qwglDescribePixelFormat = GPA("wglDescribePixelFormat");
qwglSetPixelFormat = GPA("wglSetPixelFormat");
qwglSwapBuffers = GPA("wglSwapBuffers");
qwglCreateContext = GPA("wglCreateContext");
qwglDeleteContext = GPA("wglDeleteContext");
qwglGetProcAddress = GPA("wglGetProcAddress");
qwglMakeCurrent = GPA("wglMakeCurrent");
return qtrue;
}
#undef GPA
void WGL_ShutdownExtensions(unsigned mask)
{
if (mask & QWGL_ARB_extensions_string) {
qwglGetExtensionsStringARB = NULL;
}
if (mask & QWGL_ARB_pixel_format) {
qwglChoosePixelFormatARB = NULL;
}
if (mask & QWGL_EXT_swap_control) {
qwglSwapIntervalEXT = NULL;
}
}
#define GPA(x) (void *)qwglGetProcAddress(x)
void WGL_InitExtensions(unsigned mask)
{
if (mask & QWGL_ARB_extensions_string) {
qwglGetExtensionsStringARB = GPA("wglGetExtensionsStringARB");
}
if (mask & QWGL_ARB_pixel_format) {
qwglChoosePixelFormatARB = GPA("wglChoosePixelFormatARB");
}
if (mask & QWGL_EXT_swap_control) {
qwglSwapIntervalEXT = GPA("wglSwapIntervalEXT");
}
}
#undef GPA
unsigned WGL_ParseExtensionString(const char *s)
{
// must match defines in win_wgl.h!
static const char *const extnames[] = {
"WGL_ARB_extensions_string",
"WGL_ARB_multisample",
"WGL_ARB_pixel_format",
"WGL_EXT_swap_control",
"WGL_EXT_swap_control_tear",
NULL
};
return Com_ParseExtensionString(s, extnames);
}
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