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cnq3/code/win32/win_glimp.cpp

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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
/*
** WIN_GLIMP.C
**
** This file contains ALL Win32 specific stuff having to do with the
** OpenGL refresh. When a port is being made the following functions
** must be implemented by the port:
**
** GLimp_EndFrame
** GLimp_Init
** GLimp_Shutdown
**
** Note that the GLW_xxx functions are Windows specific GL-subsystem
** related functions that are relevant ONLY to win_glimp.c
*/
#if _MSC_VER
#pragma warning (disable: 4996) // deprecated ZOMGOVERRUN! nannywhine
#endif
#include "../renderer/tr_local.h"
#include "resource.h"
#include "glw_win.h"
#include "wglext.h"
#include "win_local.h"
#define TRY_PFD_SUCCESS 0
#define TRY_PFD_FAIL_SOFT 1
#define TRY_PFD_FAIL_HARD 2
glwstate_t glw_state;
/*
** ChoosePFD
**
** Helper function that replaces ChoosePixelFormat.
*/
#define MAX_PFDS 256
static int GLW_ChoosePFD( HDC hDC, PIXELFORMATDESCRIPTOR *pPFD )
{
PIXELFORMATDESCRIPTOR pfds[MAX_PFDS+1];
int maxPFD = 0;
int i;
int bestMatch = 0;
ri.Printf( PRINT_DEVELOPER, "...GLW_ChoosePFD( %d, %d, %d )\n", ( int ) pPFD->cColorBits, ( int ) pPFD->cDepthBits, ( int ) pPFD->cStencilBits );
maxPFD = DescribePixelFormat( hDC, 1, sizeof( PIXELFORMATDESCRIPTOR ), &pfds[0] );
if ( maxPFD > MAX_PFDS )
{
ri.Printf( PRINT_WARNING, "...numPFDs > MAX_PFDS (%d > %d)\n", maxPFD, MAX_PFDS );
maxPFD = MAX_PFDS;
}
ri.Printf( PRINT_DEVELOPER, "...%d PFDs found\n", maxPFD - 1 );
// grab information
for ( i = 1; i <= maxPFD; i++ )
{
DescribePixelFormat( hDC, i, sizeof( PIXELFORMATDESCRIPTOR ), &pfds[i] );
}
// look for a best match
for ( i = 1; i <= maxPFD; i++ )
{
//
// make sure this has hardware acceleration
//
if ( ( pfds[i].dwFlags & PFD_GENERIC_FORMAT ) != 0 )
{
continue;
}
// verify pixel type
if ( pfds[i].iPixelType != PFD_TYPE_RGBA )
{
if ( r_verbose->integer )
{
ri.Printf( PRINT_DEVELOPER, "...PFD %d rejected, not RGBA\n", i );
}
continue;
}
// verify proper flags
if ( ( ( pfds[i].dwFlags & pPFD->dwFlags ) & pPFD->dwFlags ) != pPFD->dwFlags )
{
if ( r_verbose->integer )
{
ri.Printf( PRINT_DEVELOPER, "...PFD %d rejected, improper flags (%x instead of %x)\n", i, pfds[i].dwFlags, pPFD->dwFlags );
}
continue;
}
// verify enough bits
if ( pfds[i].cDepthBits < 15 )
{
continue;
}
if ( ( pfds[i].cStencilBits < 4 ) && ( pPFD->cStencilBits > 0 ) )
{
continue;
}
//
// selection criteria (in order of priority):
//
// PFD_STEREO
// colorBits
// depthBits
// stencilBits
//
if ( bestMatch )
{
// check stereo
if ( ( pfds[i].dwFlags & PFD_STEREO ) && ( !( pfds[bestMatch].dwFlags & PFD_STEREO ) ) && ( pPFD->dwFlags & PFD_STEREO ) )
{
bestMatch = i;
continue;
}
if ( !( pfds[i].dwFlags & PFD_STEREO ) && ( pfds[bestMatch].dwFlags & PFD_STEREO ) && ( pPFD->dwFlags & PFD_STEREO ) )
{
bestMatch = i;
continue;
}
// check color
if ( pfds[bestMatch].cColorBits != pPFD->cColorBits )
{
// prefer perfect match
if ( pfds[i].cColorBits == pPFD->cColorBits )
{
bestMatch = i;
continue;
}
// otherwise if this PFD has more bits than our best, use it
else if ( pfds[i].cColorBits > pfds[bestMatch].cColorBits )
{
bestMatch = i;
continue;
}
}
// check depth
if ( pfds[bestMatch].cDepthBits != pPFD->cDepthBits )
{
// prefer perfect match
if ( pfds[i].cDepthBits == pPFD->cDepthBits )
{
bestMatch = i;
continue;
}
// otherwise if this PFD has more bits than our best, use it
else if ( pfds[i].cDepthBits > pfds[bestMatch].cDepthBits )
{
bestMatch = i;
continue;
}
}
// check stencil
if ( pfds[bestMatch].cStencilBits != pPFD->cStencilBits )
{
// prefer perfect match
if ( pfds[i].cStencilBits == pPFD->cStencilBits )
{
bestMatch = i;
continue;
}
// otherwise if this PFD has more bits than our best, use it
else if ( ( pfds[i].cStencilBits > pfds[bestMatch].cStencilBits ) &&
( pPFD->cStencilBits > 0 ) )
{
bestMatch = i;
continue;
}
}
}
else
{
bestMatch = i;
}
}
if ( !bestMatch )
return 0;
if ( pfds[bestMatch].dwFlags & (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED) ) {
ri.Printf( PRINT_ALL, "...no OpenGL ICD found\n" );
return 0;
}
*pPFD = pfds[bestMatch];
return bestMatch;
}
/*
** void GLW_CreatePFD
**
** Helper function zeros out then fills in a PFD
*/
static void GLW_CreatePFD( PIXELFORMATDESCRIPTOR *pPFD, int colorbits, int depthbits, int stencilbits, qbool stereo )
{
PIXELFORMATDESCRIPTOR src =
{
sizeof(PIXELFORMATDESCRIPTOR), // size of this pfd
1, // version number
PFD_DRAW_TO_WINDOW | // support window
PFD_SUPPORT_OPENGL | // support OpenGL
PFD_DOUBLEBUFFER, // double buffered
PFD_TYPE_RGBA, // RGBA type
24, // 24-bit color depth
0, 0, 0, 0, 0, 0, // color bits ignored
0, // no alpha buffer
0, // shift bit ignored
0, // no accumulation buffer
0, 0, 0, 0, // accum bits ignored
24, // 24-bit z-buffer
8, // 8-bit stencil buffer
0, // no auxiliary buffer
PFD_MAIN_PLANE, // main layer
0, // reserved
0, 0, 0 // layer masks ignored
};
src.cColorBits = (BYTE)colorbits;
src.cDepthBits = (BYTE)depthbits;
src.cStencilBits = (BYTE)stencilbits;
if ( stereo )
{
ri.Printf( PRINT_ALL, "...attempting to use stereo\n" );
src.dwFlags |= PFD_STEREO;
glConfig.stereoEnabled = qtrue;
}
else
{
glConfig.stereoEnabled = qfalse;
}
*pPFD = src;
}
static int GLW_MakeContext( PIXELFORMATDESCRIPTOR *pPFD )
{
int pixelformat;
//
// don't putz around with pixelformat if it's already set (e.g. this is a soft
// reset of the graphics system)
//
if ( !glw_state.pixelFormatSet )
{
//
// choose, set, and describe our desired pixel format. If we're
// using a minidriver then we need to bypass the GDI functions,
// otherwise use the GDI functions.
//
if (glw_state.nPendingPF)
pixelformat = glw_state.nPendingPF;
else
if ( ( pixelformat = GLW_ChoosePFD( glw_state.hDC, pPFD ) ) == 0 )
{
ri.Printf( PRINT_ALL, "...GLW_ChoosePFD failed\n");
return TRY_PFD_FAIL_SOFT;
}
ri.Printf( PRINT_DEVELOPER, "...PIXELFORMAT %d selected\n", pixelformat );
DescribePixelFormat( glw_state.hDC, pixelformat, sizeof( *pPFD ), pPFD );
if ( SetPixelFormat( glw_state.hDC, pixelformat, pPFD ) == FALSE )
{
ri.Printf( PRINT_ALL, "...SetPixelFormat failed\n", glw_state.hDC );
return TRY_PFD_FAIL_SOFT;
}
glw_state.pixelFormatSet = qtrue;
}
//
// startup the OpenGL subsystem by creating a context and making it current
//
if ( !glw_state.hGLRC )
{
if ( ( glw_state.hGLRC = qwglCreateContext( glw_state.hDC ) ) == 0 )
{
ri.Printf( PRINT_ALL, "...GL context creation failure\n" );
return TRY_PFD_FAIL_HARD;
}
ri.Printf( PRINT_DEVELOPER, "...GL context created\n" );
if ( !qwglMakeCurrent( glw_state.hDC, glw_state.hGLRC ) )
{
qwglDeleteContext( glw_state.hGLRC );
glw_state.hGLRC = NULL;
ri.Printf( PRINT_ALL, "...GL context creation currency failure\n" );
return TRY_PFD_FAIL_HARD;
}
ri.Printf( PRINT_DEVELOPER, "...GL context creation made current\n" );
}
return TRY_PFD_SUCCESS;
}
/*
** - get a DC if one doesn't exist
** - create an HGLRC if one doesn't exist
*/
static qbool GLW_InitDriver( int colorbits )
{
int tpfd;
int depthbits, stencilbits;
static PIXELFORMATDESCRIPTOR pfd; // save between frames since 'tr' gets cleared
ri.Printf( PRINT_DEVELOPER, "Initializing OpenGL driver\n" );
//
// get a DC for our window if we don't already have one allocated
//
if ( glw_state.hDC == NULL )
{
if ( ( glw_state.hDC = GetDC( g_wv.hWnd ) ) == NULL )
{
ri.Printf( PRINT_ALL, "...Get DC failed\n" );
return qfalse;
}
ri.Printf( PRINT_DEVELOPER, "...Get DC succeeded\n" );
}
if ( colorbits == 0 )
{
colorbits = glw_state.desktopBPP;
}
//
// implicitly assume Z-buffer depth == desktop color depth
//
if ( r_depthbits->integer == 0 ) {
if ( colorbits > 16 ) {
depthbits = 24;
} else {
depthbits = 16;
}
} else {
depthbits = r_depthbits->integer;
}
//
// do not allow stencil if Z-buffer depth likely won't contain it
//
stencilbits = r_stencilbits->integer;
if ( depthbits < 24 )
{
stencilbits = 0;
}
//
// make two attempts to set the PIXELFORMAT
//
//
// first attempt: r_colorbits, depthbits, and r_stencilbits
//
if ( !glw_state.pixelFormatSet )
{
GLW_CreatePFD( &pfd, colorbits, depthbits, stencilbits, (qbool)r_stereo->integer );
if ( ( tpfd = GLW_MakeContext( &pfd ) ) != TRY_PFD_SUCCESS )
{
if ( tpfd == TRY_PFD_FAIL_HARD )
{
ri.Printf( PRINT_WARNING, "...failed hard\n" );
return qfalse;
}
//
// punt if we've already tried the desktop bit depth and no stencil bits
//
if ( ( r_colorbits->integer == glw_state.desktopBPP ) && !stencilbits )
{
ReleaseDC( g_wv.hWnd, glw_state.hDC );
glw_state.hDC = NULL;
ri.Printf( PRINT_ALL, "...failed to find an appropriate PIXELFORMAT\n" );
return qfalse;
}
//
// second attempt: desktop's color bits and no stencil
//
if ( colorbits > glw_state.desktopBPP )
colorbits = glw_state.desktopBPP;
GLW_CreatePFD( &pfd, colorbits, depthbits, 0, (qbool)r_stereo->integer );
if ( GLW_MakeContext( &pfd ) != TRY_PFD_SUCCESS )
{
if ( glw_state.hDC )
{
ReleaseDC( g_wv.hWnd, glw_state.hDC );
glw_state.hDC = NULL;
}
ri.Printf( PRINT_ALL, "...failed to find an appropriate PIXELFORMAT\n" );
return qfalse;
}
}
// report if stereo is desired but unavailable
//
if ( r_stereo->integer && !( pfd.dwFlags & PFD_STEREO ) )
{
ri.Printf( PRINT_ALL, "...failed to select stereo pixel format\n" );
glConfig.stereoEnabled = qfalse;
}
}
// store PFD specifics
//
glConfig.colorBits = ( int ) pfd.cColorBits;
glConfig.depthBits = ( int ) pfd.cDepthBits;
glConfig.stencilBits = ( int ) pfd.cStencilBits;
return qtrue;
}
// responsible for creating the Win32 window and initializing the OpenGL driver.
static qbool GLW_CreateWindow( int width, int height, int colorbits )
{
static qbool s_classRegistered = qfalse;
if ( !s_classRegistered )
{
WNDCLASS wc;
memset( &wc, 0, sizeof( wc ) );
wc.style = CS_OWNDC;
wc.lpfnWndProc = MainWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = g_wv.hInstance;
wc.hIcon = LoadIcon( g_wv.hInstance, MAKEINTRESOURCE(IDI_ICON1));
wc.hCursor = LoadCursor (NULL,IDC_ARROW);
wc.hbrBackground = (HBRUSH)COLOR_GRAYTEXT;
wc.lpszMenuName = 0;
wc.lpszClassName = CLIENT_WINDOW_TITLE;
if ( !RegisterClass( &wc ) )
ri.Error( ERR_FATAL, "GLW_CreateWindow: could not register window class" );
s_classRegistered = qtrue;
ri.Printf( PRINT_DEVELOPER, "...registered window class\n" );
}
RECT r;
int x, y, w, h;
//
// create the HWND if one does not already exist
//
if ( !g_wv.hWnd )
{
//
// compute width and height
//
r.left = 0;
r.top = 0;
r.right = width;
r.bottom = height;
int style = WS_VISIBLE | WS_SYSMENU;
int exstyle;
if ( glInfo.isFullscreen )
{
style |= WS_POPUP;
exstyle = WS_EX_TOPMOST;
}
else
{
style |= WS_OVERLAPPED | WS_BORDER | WS_CAPTION;
exstyle = 0;
AdjustWindowRect( &r, style, FALSE );
}
w = r.right - r.left;
h = r.bottom - r.top;
if ( glInfo.isFullscreen )
{
x = 0;
y = 0;
}
else
{
const cvar_t* vid_xpos = ri.Cvar_Get( "vid_xpos", "", 0 );
const cvar_t* vid_ypos = ri.Cvar_Get( "vid_ypos", "", 0 );
x = vid_xpos->integer;
y = vid_ypos->integer;
}
g_wv.hWnd = CreateWindowEx( exstyle, CLIENT_WINDOW_TITLE, CLIENT_WINDOW_TITLE, style,
x, y, w, h, NULL, NULL, g_wv.hInstance, NULL );
if ( !g_wv.hWnd )
ri.Error( ERR_FATAL, "GLW_CreateWindow() - Couldn't create window" );
ShowWindow( g_wv.hWnd, SW_SHOW );
UpdateWindow( g_wv.hWnd );
ri.Printf( PRINT_DEVELOPER, "...created window@%d,%d (%dx%d)\n", x, y, w, h );
}
else
{
ri.Printf( PRINT_DEVELOPER, "...window already present, CreateWindowEx skipped\n" );
}
if ( !GLW_InitDriver( colorbits ) )
{
ShowWindow( g_wv.hWnd, SW_HIDE );
DestroyWindow( g_wv.hWnd );
g_wv.hWnd = NULL;
return qfalse;
}
SetForegroundWindow( g_wv.hWnd );
SetFocus( g_wv.hWnd );
return qtrue;
}
static qbool GLW_Fullscreen( DEVMODE& dm )
{
int cds = ChangeDisplaySettings( &dm, CDS_FULLSCREEN );
if (cds == DISP_CHANGE_SUCCESSFUL)
return qtrue;
ri.Printf( PRINT_ALL, "...CDS: %ix%i (C%i) failed: ", dm.dmPelsWidth, dm.dmPelsHeight, dm.dmBitsPerPel );
#define CDS_ERROR(x) case x: ri.Printf( PRINT_ALL, #x##"\n" ); break;
switch (cds) {
default:
ri.Printf( PRINT_ALL, "unknown error %d\n", cds );
break;
CDS_ERROR( DISP_CHANGE_RESTART );
CDS_ERROR( DISP_CHANGE_BADPARAM );
CDS_ERROR( DISP_CHANGE_BADFLAGS );
CDS_ERROR( DISP_CHANGE_FAILED );
CDS_ERROR( DISP_CHANGE_BADMODE );
CDS_ERROR( DISP_CHANGE_NOTUPDATED );
}
#undef CDS_ERROR
return qfalse;
}
// GL_multisample is SUCH a fucking mess >:(
static void GLW_AttemptFSAA()
{
static const float ar[] = { 0, 0 };
// ignore r_xyzbits vars - FSAA requires 32-bit color, and anyone using it is implicitly on decent HW
static int anAttributes[] = {
WGL_DRAW_TO_WINDOW_ARB, GL_TRUE,
WGL_SUPPORT_OPENGL_ARB, GL_TRUE,
WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB,
WGL_DOUBLE_BUFFER_ARB, GL_TRUE,
WGL_COLOR_BITS_ARB, 32,
WGL_ALPHA_BITS_ARB, 0,
WGL_DEPTH_BITS_ARB, 24,
WGL_STENCIL_BITS_ARB, 8,
WGL_SAMPLE_BUFFERS_ARB, GL_TRUE,
WGL_SAMPLES_ARB, 4,
0, 0
};
qwglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)qwglGetProcAddress( "wglChoosePixelFormatARB" );
if (!r_ext_multisample->integer || !qwglChoosePixelFormatARB) {
glDisable(GL_MULTISAMPLE_ARB);
return;
}
int iPFD;
UINT cPFD;
anAttributes[19] = r_ext_multisample->integer; // !!! UGH
if (!qwglChoosePixelFormatARB(glw_state.hDC, anAttributes, ar, 1, &iPFD, &cPFD) || !cPFD)
return;
// now bounce the ENTIRE fucking subsytem thanks to WGL stupidity
// we can't use GLimp_Shutdown() for this, because that does CDS poking that we don't want
assert( glw_state.hGLRC && glw_state.hDC && g_wv.hWnd );
qwglMakeCurrent( glw_state.hDC, NULL );
if ( glw_state.hGLRC ) {
qwglDeleteContext( glw_state.hGLRC );
glw_state.hGLRC = NULL;
}
if ( glw_state.hDC ) {
ReleaseDC( g_wv.hWnd, glw_state.hDC );
glw_state.hDC = NULL;
}
if ( g_wv.hWnd ) {
DestroyWindow( g_wv.hWnd );
g_wv.hWnd = NULL;
}
ri.Printf( PRINT_ALL, "...enabling FSAA\n" );
glw_state.nPendingPF = iPFD;
glw_state.pixelFormatSet = qfalse;
GLW_CreateWindow( glConfig.vidWidth, glConfig.vidHeight, glConfig.colorBits );
glw_state.nPendingPF = 0;
glEnable(GL_MULTISAMPLE_ARB);
}
static qbool GLW_SetMode( qbool cdsFullscreen )
{
HDC hDC = GetDC( GetDesktopWindow() );
glw_state.desktopBPP = GetDeviceCaps( hDC, BITSPIXEL );
glw_state.desktopWidth = GetDeviceCaps( hDC, HORZRES );
glw_state.desktopHeight = GetDeviceCaps( hDC, VERTRES );
ReleaseDC( GetDesktopWindow(), hDC );
glInfo.isFullscreen = cdsFullscreen;
if ( !R_GetModeInfo( &glConfig.vidWidth, &glConfig.vidHeight, &glConfig.windowAspect ) ) {
glConfig.vidWidth = glw_state.desktopWidth;
glConfig.vidHeight = glw_state.desktopHeight;
glConfig.windowAspect = (float)glConfig.vidWidth / glConfig.vidHeight;
cdsFullscreen = qfalse;
}
//ri.Printf( PRINT_DEVELOPER, "...setting mode %dx%d %s\n", glConfig.vidWidth, glConfig.vidHeight, cdsFullscreen ? "FS" : "W" );
DEVMODE dm;
memset( &dm, 0, sizeof( dm ) );
dm.dmSize = sizeof( dm );
if (cdsFullscreen != glw_state.cdsFullscreen) {
if (cdsFullscreen) {
dm.dmPelsWidth = glConfig.vidWidth;
dm.dmPelsHeight = glConfig.vidHeight;
dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
if ( r_displayRefresh->integer ) {
dm.dmDisplayFrequency = r_displayRefresh->integer;
dm.dmFields |= DM_DISPLAYFREQUENCY;
}
if ( r_colorbits->integer ) {
dm.dmBitsPerPel = r_colorbits->integer;
dm.dmFields |= DM_BITSPERPEL;
}
glInfo.isFullscreen = qtrue;
glw_state.cdsFullscreen = qtrue;
if (!GLW_Fullscreen( dm )) {
glInfo.isFullscreen = qfalse;
glw_state.cdsFullscreen = qfalse;
}
}
else
{
ChangeDisplaySettings( 0, 0 );
glw_state.cdsFullscreen = qfalse;
}
}
if (!GLW_CreateWindow( glConfig.vidWidth, glConfig.vidHeight, glConfig.colorBits ))
return qfalse;
if (EnumDisplaySettings( NULL, ENUM_CURRENT_SETTINGS, &dm ))
glInfo.displayFrequency = dm.dmDisplayFrequency;
GLW_AttemptFSAA();
return qtrue;
}
static void GLW_InitExtensions()
{
ri.Printf( PRINT_DEVELOPER, "Initializing OpenGL extensions\n" );
#define QGL_EXT(T, fn) q##fn = (T)qwglGetProcAddress( #fn ); \
if (!q##fn) Com_Error( ERR_FATAL, "QGL_EXT: required extension "#fn" not found" );
QGL_EXT( PFNGLLOCKARRAYSEXTPROC, glLockArraysEXT );
QGL_EXT( PFNGLUNLOCKARRAYSEXTPROC, glUnlockArraysEXT );
QGL_EXT( PFNGLACTIVETEXTUREARBPROC, glActiveTextureARB );
QGL_EXT( PFNGLCLIENTACTIVETEXTUREARBPROC, glClientActiveTextureARB );
#undef QGL_EXT
// WGL_EXT_swap_control
qwglSwapIntervalEXT = ( BOOL (WINAPI *)(int)) qwglGetProcAddress( "wglSwapIntervalEXT" );
if ( qwglSwapIntervalEXT )
{
ri.Printf( PRINT_DEVELOPER, "...using WGL_EXT_swap_control\n" );
r_swapInterval->modified = qtrue; // force a set next frame
}
else
{
ri.Printf( PRINT_DEVELOPER, "...WGL_EXT_swap_control not found\n" );
}
int maxAnisotropy = 0;
if ( strstr( glConfig.extensions_string, "GL_EXT_texture_filter_anisotropic" ) )
{
if (r_ext_max_anisotropy->integer > 1) {
qglGetIntegerv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxAnisotropy );
if ( maxAnisotropy <= 0 ) {
ri.Printf( PRINT_DEVELOPER, "...GL_EXT_texture_filter_anisotropic not properly supported!\n" );
maxAnisotropy = 0;
}
else
{
ri.Printf( PRINT_DEVELOPER, "...using GL_EXT_texture_filter_anisotropic (max: %i)\n", maxAnisotropy );
}
}
else
{
ri.Printf( PRINT_DEVELOPER, "...ignoring GL_EXT_texture_filter_anisotropic\n" );
}
}
else
{
ri.Printf( PRINT_DEVELOPER, "...GL_EXT_texture_filter_anisotropic not found\n" );
}
Cvar_Set( "r_ext_max_anisotropy", va("%i", maxAnisotropy) );
}
static qbool GLW_LoadOpenGL()
{
// only real GL implementations are acceptable
const char* OPENGL_DRIVER_NAME = "opengl32";
// load the driver and bind our function pointers to it
if ( QGL_Init( OPENGL_DRIVER_NAME ) ) {
// create the window and set up the context
if ( GLW_SetMode( (qbool)r_fullscreen->integer ) ) {
return qtrue;
}
}
QGL_Shutdown();
return qfalse;
}
void GLimp_EndFrame()
{
if ( r_swapInterval->modified ) {
r_swapInterval->modified = qfalse;
if ( !glConfig.stereoEnabled && qwglSwapIntervalEXT ) {
qwglSwapIntervalEXT( r_swapInterval->integer );
}
}
// don't flip if drawing to front buffer
if ( Q_stricmp( r_drawBuffer->string, "GL_FRONT" ) != 0 ) {
SwapBuffers( glw_state.hDC );
}
}
///////////////////////////////////////////////////////////////
static unsigned short s_oldHardwareGamma[3][256];
static void GLW_CheckHardwareGamma()
{
glConfig.deviceSupportsGamma = qfalse;
if (r_ignorehwgamma->integer)
return;
HDC hDC = GetDC( GetDesktopWindow() );
glConfig.deviceSupportsGamma = (qbool)GetDeviceGammaRamp( hDC, s_oldHardwareGamma );
ReleaseDC( GetDesktopWindow(), hDC );
if (!glConfig.deviceSupportsGamma)
return;
// do a sanity check on the gamma values
if ( ( HIBYTE( s_oldHardwareGamma[0][255] ) <= HIBYTE( s_oldHardwareGamma[0][0] ) ) ||
( HIBYTE( s_oldHardwareGamma[1][255] ) <= HIBYTE( s_oldHardwareGamma[1][0] ) ) ||
( HIBYTE( s_oldHardwareGamma[2][255] ) <= HIBYTE( s_oldHardwareGamma[2][0] ) ) )
{
glConfig.deviceSupportsGamma = qfalse;
ri.Printf( PRINT_WARNING, "WARNING: device has broken gamma support\n" );
}
// make sure that we didn't have a prior crash in the game:
// if so, we need to restore the gamma values to at least a linear value
if ( ( HIBYTE( s_oldHardwareGamma[0][181] ) == 255 ) )
{
ri.Printf( PRINT_WARNING, "WARNING: suspicious gamma tables, using linear ramp for restoration\n" );
for (unsigned short g = 0; g < 255; ++g)
{
s_oldHardwareGamma[0][g] = g << 8;
s_oldHardwareGamma[1][g] = g << 8;
s_oldHardwareGamma[2][g] = g << 8;
}
}
}
void GLW_RestoreGamma()
{
if (!glConfig.deviceSupportsGamma || !glw_state.gammaRampSet)
return;
HDC hDC = GetDC( GetDesktopWindow() );
if ( SetDeviceGammaRamp( hDC, s_oldHardwareGamma ) )
glw_state.gammaRampSet = qfalse;
ReleaseDC( GetDesktopWindow(), hDC );
}
void GLimp_SetGamma( unsigned char red[256], unsigned char green[256], unsigned char blue[256] )
{
unsigned short table[3][256];
int i, j;
if ( !glConfig.deviceSupportsGamma || r_ignorehwgamma->integer || !glw_state.hDC )
return;
for ( i = 0; i < 256; i++ ) {
table[0][i] = ( ( ( unsigned short ) red[i] ) << 8 ) | red[i];
table[1][i] = ( ( ( unsigned short ) green[i] ) << 8 ) | green[i];
table[2][i] = ( ( ( unsigned short ) blue[i] ) << 8 ) | blue[i];
}
for ( j = 0 ; j < 3 ; j++ ) {
for ( i = 0 ; i < 128 ; i++ ) {
if ( table[j][i] > ( (128+i) << 8 ) ) {
table[j][i] = (128+i) << 8;
}
}
if ( table[j][127] > 254<<8 ) {
table[j][127] = 254<<8;
}
}
if ( SetDeviceGammaRamp( glw_state.hDC, table ) ) {
glw_state.gammaRampSet = qtrue;
} else {
Com_Printf( "SetDeviceGammaRamp failed.\n" );
}
}
///////////////////////////////////////////////////////////////
/*
This is the platform specific OpenGL initialization function.
It is responsible for loading OpenGL, initializing it, setting
extensions, creating a window of the appropriate size, doing
fullscreen manipulations, etc. Its overall responsibility is
to make sure that a functional OpenGL subsystem is operating
when it returns to the ref.
*/
void GLimp_Init()
{
ri.Printf( PRINT_DEVELOPER, "Initializing OpenGL subsystem\n" );
// save off hInstance for the subsystems
const cvar_t* cv = ri.Cvar_Get( "win_hinstance", "", 0 );
sscanf( cv->string, "%i", (int *)&g_wv.hInstance );
// load appropriate DLL and initialize subsystem
if (!GLW_LoadOpenGL())
ri.Error( ERR_FATAL, "GLimp_Init() - could not load OpenGL subsystem\n" );
// get our config strings
Q_strncpyz( glConfig.vendor_string, (const char*)qglGetString (GL_VENDOR), sizeof( glConfig.vendor_string ) );
Q_strncpyz( glConfig.renderer_string, (const char*)qglGetString (GL_RENDERER), sizeof( glConfig.renderer_string ) );
Q_strncpyz( glConfig.version_string, (const char*)qglGetString (GL_VERSION), sizeof( glConfig.version_string ) );
Q_strncpyz( glConfig.extensions_string, (const char*)qglGetString (GL_EXTENSIONS), sizeof( glConfig.extensions_string ) );
GLW_InitExtensions();
GLW_CheckHardwareGamma();
if (GLW_InitARB() && QGL_InitARB())
return;
ri.Error( ERR_FATAL, "GLimp_Init() - could not find an acceptable OpenGL subsystem\n" );
}
// do all OS specific shutdown procedures for the OpenGL subsystem
void GLimp_Shutdown()
{
const char* success[] = { "failed", "success" };
int retVal;
// FIXME: Brian, we need better fallbacks from partially initialized failures
if ( !qwglMakeCurrent ) {
return;
}
ri.Printf( PRINT_DEVELOPER, "Shutting down OpenGL subsystem\n" );
GLW_RestoreGamma();
// set current context to NULL
if ( qwglMakeCurrent )
{
retVal = qwglMakeCurrent( NULL, NULL ) != 0;
ri.Printf( PRINT_DEVELOPER, "...wglMakeCurrent( NULL, NULL ): %s\n", success[retVal] );
}
// delete HGLRC
if ( glw_state.hGLRC )
{
retVal = qwglDeleteContext( glw_state.hGLRC ) != 0;
ri.Printf( PRINT_DEVELOPER, "...deleting GL context: %s\n", success[retVal] );
glw_state.hGLRC = NULL;
}
// release DC
if ( glw_state.hDC )
{
retVal = ReleaseDC( g_wv.hWnd, glw_state.hDC ) != 0;
ri.Printf( PRINT_DEVELOPER, "...releasing DC: %s\n", success[retVal] );
glw_state.hDC = NULL;
}
// destroy window
if ( g_wv.hWnd )
{
ri.Printf( PRINT_DEVELOPER, "...destroying window\n" );
ShowWindow( g_wv.hWnd, SW_HIDE );
DestroyWindow( g_wv.hWnd );
g_wv.hWnd = NULL;
glw_state.pixelFormatSet = qfalse;
}
// reset display settings
if ( glw_state.cdsFullscreen )
{
ri.Printf( PRINT_DEVELOPER, "...resetting display\n" );
ChangeDisplaySettings( 0, 0 );
glw_state.cdsFullscreen = qfalse;
}
// shutdown QGL subsystem
QGL_Shutdown();
memset( &glConfig, 0, sizeof( glConfig ) );
memset( &glState, 0, sizeof( glState ) );
}
/*
===========================================================
SMP acceleration
===========================================================
*/
static HANDLE renderCommandsEvent;
static HANDLE renderCompletedEvent;
static HANDLE renderActiveEvent;
static void (*glimpRenderThread)( void );
static void GLimp_RenderThreadWrapper()
{
glimpRenderThread();
// unbind the context before we die
qwglMakeCurrent( glw_state.hDC, NULL );
}
qbool GLimp_SpawnRenderThread( void (*function)( void ) )
{
renderCommandsEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
renderCompletedEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
renderActiveEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
glimpRenderThread = function;
DWORD renderThreadId;
HANDLE renderThreadHandle = CreateThread(
NULL, // LPSECURITY_ATTRIBUTES lpsa,
0, // DWORD cbStack,
(LPTHREAD_START_ROUTINE)GLimp_RenderThreadWrapper, // LPTHREAD_START_ROUTINE lpStartAddr,
0, // LPVOID lpvThreadParm,
0, // DWORD fdwCreate,
&renderThreadId );
return (renderThreadHandle != NULL);
}
static void *smpData;
static int wglErrors;
void *GLimp_RendererSleep( void ) {
void *data;
if ( !qwglMakeCurrent( glw_state.hDC, NULL ) ) {
wglErrors++;
}
ResetEvent( renderActiveEvent );
// after this, the front end can exit GLimp_FrontEndSleep
SetEvent( renderCompletedEvent );
WaitForSingleObject( renderCommandsEvent, INFINITE );
if ( !qwglMakeCurrent( glw_state.hDC, glw_state.hGLRC ) ) {
wglErrors++;
}
ResetEvent( renderCompletedEvent );
ResetEvent( renderCommandsEvent );
data = smpData;
// after this, the main thread can exit GLimp_WakeRenderer
SetEvent( renderActiveEvent );
return data;
}
void GLimp_FrontEndSleep( void ) {
WaitForSingleObject( renderCompletedEvent, INFINITE );
if ( !qwglMakeCurrent( glw_state.hDC, glw_state.hGLRC ) ) {
wglErrors++;
}
}
void GLimp_WakeRenderer( void *data ) {
smpData = data;
if ( !qwglMakeCurrent( glw_state.hDC, NULL ) ) {
wglErrors++;
}
// after this, the renderer can continue through GLimp_RendererSleep
SetEvent( renderCommandsEvent );
WaitForSingleObject( renderActiveEvent, INFINITE );
}
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