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quadrilateralcowboy/sys/win32/win_glimp.cpp

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2020-06-12 21:06:25 +00:00
/*
===========================================================================
Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).
Doom 3 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 3 of the License, or
(at your option) any later version.
Doom 3 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 Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 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_SwapBuffers
** GLimp_Init
** GLimp_Shutdown
** GLimp_SetGamma
**
** Note that the GLW_xxx functions are Windows specific GL-subsystem
** related functions that are relevant ONLY to win_glimp.c
*/
#ifndef USE_SDL
#include "../../idlib/precompiled.h"
#pragma hdrstop
#include "win_local.h"
#include "rc/AFEditor_resource.h"
#include "rc/doom_resource.h"
#include "../../renderer/tr_local.h"
static void GLW_InitExtensions( void );
// WGL_ARB_extensions_string
PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB;
// WGL_EXT_swap_interval
PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT;
// WGL_ARB_pixel_format
PFNWGLGETPIXELFORMATATTRIBIVARBPROC wglGetPixelFormatAttribivARB;
PFNWGLGETPIXELFORMATATTRIBFVARBPROC wglGetPixelFormatAttribfvARB;
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB;
// WGL_ARB_pbuffer
PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB;
PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB;
PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB;
PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB;
PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB;
// WGL_ARB_render_texture
PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB;
PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB;
PFNWGLSETPBUFFERATTRIBARBPROC wglSetPbufferAttribARB;
/* ARB_pixel_format */
#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
#define WGL_DRAW_TO_WINDOW_ARB 0x2001
#define WGL_DRAW_TO_BITMAP_ARB 0x2002
#define WGL_ACCELERATION_ARB 0x2003
#define WGL_NEED_PALETTE_ARB 0x2004
#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
#define WGL_SWAP_METHOD_ARB 0x2007
#define WGL_NUMBER_OVERLAYS_ARB 0x2008
#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
#define WGL_TRANSPARENT_ARB 0x200A
#define WGL_SHARE_DEPTH_ARB 0x200C
#define WGL_SHARE_STENCIL_ARB 0x200D
#define WGL_SHARE_ACCUM_ARB 0x200E
#define WGL_SUPPORT_GDI_ARB 0x200F
#define WGL_SUPPORT_OPENGL_ARB 0x2010
#define WGL_DOUBLE_BUFFER_ARB 0x2011
#define WGL_STEREO_ARB 0x2012
#define WGL_PIXEL_TYPE_ARB 0x2013
#define WGL_COLOR_BITS_ARB 0x2014
#define WGL_RED_BITS_ARB 0x2015
#define WGL_RED_SHIFT_ARB 0x2016
#define WGL_GREEN_BITS_ARB 0x2017
#define WGL_GREEN_SHIFT_ARB 0x2018
#define WGL_BLUE_BITS_ARB 0x2019
#define WGL_BLUE_SHIFT_ARB 0x201A
#define WGL_ALPHA_BITS_ARB 0x201B
#define WGL_ALPHA_SHIFT_ARB 0x201C
#define WGL_ACCUM_BITS_ARB 0x201D
#define WGL_ACCUM_RED_BITS_ARB 0x201E
#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
#define WGL_DEPTH_BITS_ARB 0x2022
#define WGL_STENCIL_BITS_ARB 0x2023
#define WGL_AUX_BUFFERS_ARB 0x2024
#define WGL_NO_ACCELERATION_ARB 0x2025
#define WGL_GENERIC_ACCELERATION_ARB 0x2026
#define WGL_FULL_ACCELERATION_ARB 0x2027
#define WGL_SWAP_EXCHANGE_ARB 0x2028
#define WGL_SWAP_COPY_ARB 0x2029
#define WGL_SWAP_UNDEFINED_ARB 0x202A
#define WGL_TYPE_RGBA_ARB 0x202B
#define WGL_TYPE_COLORINDEX_ARB 0x202C
#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
/* ARB_multisample */
#define WGL_SAMPLE_BUFFERS_ARB 0x2041
#define WGL_SAMPLES_ARB 0x2042
//
// function declaration
//
bool QGL_Init( const char *dllname );
void QGL_Shutdown( void );
/*
========================
GLimp_GetOldGammaRamp
========================
*/
static void GLimp_SaveGamma( void ) {
HDC hDC;
BOOL success;
hDC = GetDC( GetDesktopWindow() );
success = GetDeviceGammaRamp( hDC, win32.oldHardwareGamma );
common->DPrintf( "...getting default gamma ramp: %s\n", success ? "success" : "failed" );
ReleaseDC( GetDesktopWindow(), hDC );
}
/*
========================
GLimp_RestoreGamma
========================
*/
static void GLimp_RestoreGamma( void ) {
HDC hDC;
BOOL success;
// if we never read in a reasonable looking
// table, don't write it out
if ( win32.oldHardwareGamma[0][255] == 0 ) {
return;
}
hDC = GetDC( GetDesktopWindow() );
success = SetDeviceGammaRamp( hDC, win32.oldHardwareGamma );
common->DPrintf ( "...restoring hardware gamma: %s\n", success ? "success" : "failed" );
ReleaseDC( GetDesktopWindow(), hDC );
}
/*
========================
GLimp_SetGamma
The renderer calls this when the user adjusts r_gamma or r_brightness
========================
*/
void GLimp_SetGamma( unsigned short red[256], unsigned short green[256], unsigned short blue[256] ) {
unsigned short table[3][256];
int i;
if ( !win32.hDC ) {
return;
}
for ( i = 0; i < 256; i++ ) {
table[0][i] = red[i];
table[1][i] = green[i];
table[2][i] = blue[i];
}
if ( !SetDeviceGammaRamp( win32.hDC, table ) ) {
common->Printf( "WARNING: SetDeviceGammaRamp failed.\n" );
}
}
/*
=============================================================================
WglExtension Grabbing
This is gross -- creating a window just to get a context to get the wgl extensions
=============================================================================
*/
/*
====================
FakeWndProc
Only used to get wglExtensions
====================
*/
LONG WINAPI FakeWndProc (
HWND hWnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam) {
if ( uMsg == WM_DESTROY ) {
PostQuitMessage(0);
}
if ( uMsg != WM_CREATE ) {
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
const static PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0,
8, 0,
0, 0, 0, 0,
24, 8,
0,
PFD_MAIN_PLANE,
0,
0,
0,
0,
};
int pixelFormat;
HDC hDC;
HGLRC hGLRC;
hDC = GetDC(hWnd);
// Set up OpenGL
pixelFormat = ChoosePixelFormat(hDC, &pfd);
SetPixelFormat(hDC, pixelFormat, &pfd);
hGLRC = qwglCreateContext(hDC);
qwglMakeCurrent(hDC, hGLRC);
// free things
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hGLRC);
ReleaseDC(hWnd, hDC);
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
/*
==================
GLW_GetWGLExtensionsWithFakeWindow
==================
*/
void GLW_CheckWGLExtensions( HDC hDC ) {
wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)
GLimp_ExtensionPointer("wglGetExtensionsStringARB");
if ( wglGetExtensionsStringARB ) {
glConfig.wgl_extensions_string = (const char *) wglGetExtensionsStringARB(hDC);
} else {
glConfig.wgl_extensions_string = "";
}
// WGL_EXT_swap_control
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) GLimp_ExtensionPointer( "wglSwapIntervalEXT" );
r_swapInterval.SetModified(); // force a set next frame
// WGL_ARB_pixel_format
wglGetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)GLimp_ExtensionPointer("wglGetPixelFormatAttribivARB");
wglGetPixelFormatAttribfvARB = (PFNWGLGETPIXELFORMATATTRIBFVARBPROC)GLimp_ExtensionPointer("wglGetPixelFormatAttribfvARB");
wglChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)GLimp_ExtensionPointer("wglChoosePixelFormatARB");
// WGL_ARB_pbuffer
wglCreatePbufferARB = (PFNWGLCREATEPBUFFERARBPROC)GLimp_ExtensionPointer("wglCreatePbufferARB");
wglGetPbufferDCARB = (PFNWGLGETPBUFFERDCARBPROC)GLimp_ExtensionPointer("wglGetPbufferDCARB");
wglReleasePbufferDCARB = (PFNWGLRELEASEPBUFFERDCARBPROC)GLimp_ExtensionPointer("wglReleasePbufferDCARB");
wglDestroyPbufferARB = (PFNWGLDESTROYPBUFFERARBPROC)GLimp_ExtensionPointer("wglDestroyPbufferARB");
wglQueryPbufferARB = (PFNWGLQUERYPBUFFERARBPROC)GLimp_ExtensionPointer("wglQueryPbufferARB");
// WGL_ARB_render_texture
wglBindTexImageARB = (PFNWGLBINDTEXIMAGEARBPROC)GLimp_ExtensionPointer("wglBindTexImageARB");
wglReleaseTexImageARB = (PFNWGLRELEASETEXIMAGEARBPROC)GLimp_ExtensionPointer("wglReleaseTexImageARB");
wglSetPbufferAttribARB = (PFNWGLSETPBUFFERATTRIBARBPROC)GLimp_ExtensionPointer("wglSetPbufferAttribARB");
}
/*
==================
GLW_GetWGLExtensionsWithFakeWindow
==================
*/
static void GLW_GetWGLExtensionsWithFakeWindow( void ) {
HWND hWnd;
MSG msg;
// Create a window for the sole purpose of getting
// a valid context to get the wglextensions
hWnd = CreateWindow(WIN32_FAKE_WINDOW_CLASS_NAME, GAME_NAME,
WS_OVERLAPPEDWINDOW,
40, 40,
640,
480,
NULL, NULL, win32.hInstance, NULL );
if ( !hWnd ) {
common->FatalError( "GLW_GetWGLExtensionsWithFakeWindow: Couldn't create fake window" );
}
HDC hDC = GetDC( hWnd );
HGLRC gRC = wglCreateContext( hDC );
wglMakeCurrent( hDC, gRC );
GLW_CheckWGLExtensions( hDC );
wglDeleteContext( gRC );
ReleaseDC( hWnd, hDC );
DestroyWindow( hWnd );
while ( GetMessage( &msg, NULL, 0, 0 ) ) {
TranslateMessage( &msg );
DispatchMessage( &msg );
}
}
//=============================================================================
/*
====================
GLW_WM_CREATE
====================
*/
void GLW_WM_CREATE( HWND hWnd ) {
}
/*
====================
GLW_InitDriver
Set the pixelformat for the window before it is
shown, and create the rendering context
====================
*/
static bool GLW_InitDriver( glimpParms_t parms ) {
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
32, // 32-bit color depth
0, 0, 0, 0, 0, 0, // color bits ignored
8, // 8 bit destination alpha
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
};
common->Printf( "Initializing OpenGL driver\n" );
//
// get a DC for our window if we don't already have one allocated
//
if ( win32.hDC == NULL ) {
common->Printf( "...getting DC: " );
if ( ( win32.hDC = GetDC( win32.hWnd ) ) == NULL ) {
common->Printf( "^3failed^0\n" );
return false;
}
common->Printf( "succeeded\n" );
}
// the multisample path uses the wgl
if ( wglChoosePixelFormatARB && parms.multiSamples > 1 ) {
int iAttributes[20];
FLOAT fAttributes[] = {0, 0};
UINT numFormats;
// FIXME: specify all the other stuff
iAttributes[0] = WGL_SAMPLE_BUFFERS_ARB;
iAttributes[1] = 1;
iAttributes[2] = WGL_SAMPLES_ARB;
iAttributes[3] = parms.multiSamples;
iAttributes[4] = WGL_DOUBLE_BUFFER_ARB;
iAttributes[5] = TRUE;
iAttributes[6] = WGL_STENCIL_BITS_ARB;
iAttributes[7] = 8;
iAttributes[8] = WGL_DEPTH_BITS_ARB;
iAttributes[9] = 24;
iAttributes[10] = WGL_RED_BITS_ARB;
iAttributes[11] = 8;
iAttributes[12] = WGL_BLUE_BITS_ARB;
iAttributes[13] = 8;
iAttributes[14] = WGL_GREEN_BITS_ARB;
iAttributes[15] = 8;
iAttributes[16] = WGL_ALPHA_BITS_ARB;
iAttributes[17] = 8;
iAttributes[18] = 0;
iAttributes[19] = 0;
wglChoosePixelFormatARB( win32.hDC, iAttributes, fAttributes, 1, &win32.pixelformat, &numFormats );
} else {
// this is the "classic" choose pixel format path
// eventually we may need to have more fallbacks, but for
// now, ask for everything
if ( parms.stereo ) {
common->Printf( "...attempting to use stereo\n" );
src.dwFlags |= PFD_STEREO;
}
//
// 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 ( ( win32.pixelformat = ChoosePixelFormat( win32.hDC, &src ) ) == 0 ) {
common->Printf( "...^3GLW_ChoosePFD failed^0\n");
return false;
}
common->Printf( "...PIXELFORMAT %d selected\n", win32.pixelformat );
}
// get the full info
DescribePixelFormat( win32.hDC, win32.pixelformat, sizeof( win32.pfd ), &win32.pfd );
glConfig.colorBits = win32.pfd.cColorBits;
glConfig.depthBits = win32.pfd.cDepthBits;
glConfig.stencilBits = win32.pfd.cStencilBits;
// XP seems to set this incorrectly
if ( !glConfig.stencilBits ) {
glConfig.stencilBits = 8;
}
// the same SetPixelFormat is used either way
if ( SetPixelFormat( win32.hDC, win32.pixelformat, &win32.pfd ) == FALSE ) {
common->Printf( "...^3SetPixelFormat failed^0\n", win32.hDC );
return false;
}
//
// startup the OpenGL subsystem by creating a context and making it current
//
common->Printf( "...creating GL context: " );
if ( ( win32.hGLRC = qwglCreateContext( win32.hDC ) ) == 0 ) {
common->Printf( "^3failed^0\n" );
return false;
}
common->Printf( "succeeded\n" );
common->Printf( "...making context current: " );
if ( !qwglMakeCurrent( win32.hDC, win32.hGLRC ) ) {
qwglDeleteContext( win32.hGLRC );
win32.hGLRC = NULL;
common->Printf( "^3failed^0\n" );
return false;
}
common->Printf( "succeeded\n" );
return true;
}
/*
====================
GLW_CreateWindowClasses
====================
*/
static void GLW_CreateWindowClasses( void ) {
WNDCLASS wc;
//
// register the window class if necessary
//
if ( win32.windowClassRegistered ) {
return;
}
memset( &wc, 0, sizeof( wc ) );
wc.style = 0;
wc.lpfnWndProc = (WNDPROC) MainWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = win32.hInstance;
wc.hIcon = LoadIcon( win32.hInstance, MAKEINTRESOURCE(IDI_ICON1));
wc.hCursor = LoadCursor (NULL,IDC_ARROW);
wc.hbrBackground = (struct HBRUSH__ *)COLOR_GRAYTEXT;
wc.lpszMenuName = 0;
wc.lpszClassName = WIN32_WINDOW_CLASS_NAME;
if ( !RegisterClass( &wc ) ) {
common->FatalError( "GLW_CreateWindow: could not register window class" );
}
common->Printf( "...registered window class\n" );
// now register the fake window class that is only used
// to get wgl extensions
wc.style = 0;
wc.lpfnWndProc = (WNDPROC) FakeWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = win32.hInstance;
wc.hIcon = LoadIcon( win32.hInstance, MAKEINTRESOURCE(IDI_ICON1));
wc.hCursor = LoadCursor (NULL,IDC_ARROW);
wc.hbrBackground = (struct HBRUSH__ *)COLOR_GRAYTEXT;
wc.lpszMenuName = 0;
wc.lpszClassName = WIN32_FAKE_WINDOW_CLASS_NAME;
if ( !RegisterClass( &wc ) ) {
common->FatalError( "GLW_CreateWindow: could not register window class" );
}
common->Printf( "...registered fake window class\n" );
win32.windowClassRegistered = true;
}
/*
=======================
GLW_CreateWindow
Responsible for creating the Win32 window.
If cdsFullscreen is true, it won't have a border
=======================
*/
static bool GLW_CreateWindow( glimpParms_t parms ) {
int stylebits;
int x, y, w, h;
int exstyle;
//
// compute width and height
//
if ( parms.fullScreen ) {
exstyle = WS_EX_TOPMOST;
stylebits = WS_POPUP|WS_VISIBLE|WS_SYSMENU;
x = 0;
y = 0;
w = parms.width;
h = parms.height;
} else {
RECT r;
// adjust width and height for window border
r.bottom = parms.height;
r.left = 0;
r.top = 0;
r.right = parms.width;
exstyle = 0;
stylebits = WINDOW_STYLE|WS_SYSMENU;
AdjustWindowRect (&r, stylebits, FALSE);
w = r.right - r.left;
h = r.bottom - r.top;
x = win32.win_xpos.GetInteger();
y = win32.win_ypos.GetInteger();
// adjust window coordinates if necessary
// so that the window is completely on screen
if ( x + w > win32.desktopWidth ) {
x = ( win32.desktopWidth - w );
}
if ( y + h > win32.desktopHeight ) {
y = ( win32.desktopHeight - h );
}
if ( x < 0 ) {
x = 0;
}
if ( y < 0 ) {
y = 0;
}
}
win32.hWnd = CreateWindowEx (
exstyle,
WIN32_WINDOW_CLASS_NAME,
GAME_NAME,
stylebits,
x, y, w, h,
NULL,
NULL,
win32.hInstance,
NULL);
if ( !win32.hWnd ) {
common->Printf( "^3GLW_CreateWindow() - Couldn't create window^0\n" );
return false;
}
::SetTimer( win32.hWnd, 0, 100, NULL );
ShowWindow( win32.hWnd, SW_SHOW );
UpdateWindow( win32.hWnd );
common->Printf( "...created window @ %d,%d (%dx%d)\n", x, y, w, h );
if ( !GLW_InitDriver( parms ) ) {
ShowWindow( win32.hWnd, SW_HIDE );
DestroyWindow( win32.hWnd );
win32.hWnd = NULL;
return false;
}
SetForegroundWindow( win32.hWnd );
SetFocus( win32.hWnd );
glConfig.isFullscreen = parms.fullScreen;
return true;
}
static void PrintCDSError( int value ) {
switch ( value ) {
case DISP_CHANGE_RESTART:
common->Printf( "restart required\n" );
break;
case DISP_CHANGE_BADPARAM:
common->Printf( "bad param\n" );
break;
case DISP_CHANGE_BADFLAGS:
common->Printf( "bad flags\n" );
break;
case DISP_CHANGE_FAILED:
common->Printf( "DISP_CHANGE_FAILED\n" );
break;
case DISP_CHANGE_BADMODE:
common->Printf( "bad mode\n" );
break;
case DISP_CHANGE_NOTUPDATED:
common->Printf( "not updated\n" );
break;
default:
common->Printf( "unknown error %d\n", value );
break;
}
}
/*
===================
GLW_SetFullScreen
===================
*/
static bool GLW_SetFullScreen( glimpParms_t parms ) {
#if 0
// for some reason, bounds checker claims that windows is
// writing past the bounds of dm in the get display frequency call
union {
DEVMODE dm;
byte filler[1024];
} hack;
#endif
DEVMODE dm;
int cdsRet;
DEVMODE devmode;
int modeNum;
bool matched;
// first make sure the user is not trying to select a mode that his card/monitor can't handle
matched = false;
for ( modeNum = 0 ; ; modeNum++ ) {
if ( !EnumDisplaySettings( NULL, modeNum, &devmode ) ) {
if ( matched ) {
// we got a resolution match, but not a frequency match
// so disable the frequency requirement
common->Printf( "...^3%dhz is unsupported at %dx%d^0\n", parms.displayHz, parms.width, parms.height );
parms.displayHz = 0;
break;
}
common->Printf( "...^3%dx%d is unsupported in 32 bit^0\n", parms.width, parms.height );
return false;
}
if ( (int)devmode.dmPelsWidth >= parms.width
&& (int)devmode.dmPelsHeight >= parms.height
&& devmode.dmBitsPerPel == 32 ) {
matched = true;
if ( parms.displayHz == 0 || devmode.dmDisplayFrequency == parms.displayHz ) {
break;
}
}
}
memset( &dm, 0, sizeof( dm ) );
dm.dmSize = sizeof( dm );
dm.dmPelsWidth = parms.width;
dm.dmPelsHeight = parms.height;
dm.dmBitsPerPel = 32;
dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;
if ( parms.displayHz != 0 ) {
dm.dmDisplayFrequency = parms.displayHz;
dm.dmFields |= DM_DISPLAYFREQUENCY;
}
common->Printf( "...calling CDS: " );
// try setting the exact mode requested, because some drivers don't report
// the low res modes in EnumDisplaySettings, but still work
if ( ( cdsRet = ChangeDisplaySettings( &dm, CDS_FULLSCREEN ) ) == DISP_CHANGE_SUCCESSFUL ) {
common->Printf( "ok\n" );
win32.cdsFullscreen = true;
return true;
}
//
// the exact mode failed, so scan EnumDisplaySettings for the next largest mode
//
common->Printf( "^3failed^0, " );
PrintCDSError( cdsRet );
common->Printf( "...trying next higher resolution:" );
// we could do a better matching job here...
for ( modeNum = 0 ; ; modeNum++ ) {
if ( !EnumDisplaySettings( NULL, modeNum, &devmode ) ) {
break;
}
if ( (int)devmode.dmPelsWidth >= parms.width
&& (int)devmode.dmPelsHeight >= parms.height
&& devmode.dmBitsPerPel == 32 ) {
if ( ( cdsRet = ChangeDisplaySettings( &devmode, CDS_FULLSCREEN ) ) == DISP_CHANGE_SUCCESSFUL ) {
common->Printf( "ok\n" );
win32.cdsFullscreen = true;
return true;
}
break;
}
}
common->Printf( "\n...^3no high res mode found^0\n" );
return false;
}
/*
===================
GLimp_Init
This is the platform specific OpenGL initialization function. It
is responsible for loading OpenGL, initializing it,
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.
If there is any failure, the renderer will revert back to safe
parameters and try again.
===================
*/
bool GLimp_Init( glimpParms_t parms ) {
const char *driverName;
HDC hDC;
common->Printf( "Initializing OpenGL subsystem\n" );
// check our desktop attributes
hDC = GetDC( GetDesktopWindow() );
win32.desktopBitsPixel = GetDeviceCaps( hDC, BITSPIXEL );
win32.desktopWidth = GetDeviceCaps( hDC, HORZRES );
win32.desktopHeight = GetDeviceCaps( hDC, VERTRES );
ReleaseDC( GetDesktopWindow(), hDC );
// we can't run in a window unless it is 32 bpp
if ( win32.desktopBitsPixel < 32 && !parms.fullScreen ) {
common->Printf("^3Windowed mode requires 32 bit desktop depth^0\n");
return false;
}
// save the hardware gamma so it can be
// restored on exit
GLimp_SaveGamma();
// create our window classes if we haven't already
GLW_CreateWindowClasses();
// this will load the dll and set all our qgl* function pointers,
// but doesn't create a window
// r_glDriver is only intended for using instrumented OpenGL
// dlls. Normal users should never have to use it, and it is
// not archived.
driverName = r_glDriver.GetString()[0] ? r_glDriver.GetString() : "opengl32";
if ( !QGL_Init( driverName ) ) {
common->Printf( "^3GLimp_Init() could not load r_glDriver \"%s\"^0\n", driverName );
return false;
}
// getting the wgl extensions involves creating a fake window to get a context,
// which is pretty disgusting, and seems to mess with the AGP VAR allocation
GLW_GetWGLExtensionsWithFakeWindow();
// try to change to fullscreen
if ( parms.fullScreen ) {
if ( !GLW_SetFullScreen( parms ) ) {
GLimp_Shutdown();
return false;
}
}
// try to create a window with the correct pixel format
// and init the renderer context
if ( !GLW_CreateWindow( parms ) ) {
GLimp_Shutdown();
return false;
}
// wglSwapinterval, etc
GLW_CheckWGLExtensions( win32.hDC );
// check logging
GLimp_EnableLogging( ( r_logFile.GetInteger() != 0 ) );
return true;
}
/*
===================
GLimp_SetScreenParms
Sets up the screen based on passed parms..
===================
*/
bool GLimp_SetScreenParms( glimpParms_t parms ) {
int exstyle;
int stylebits;
int x, y, w, h;
DEVMODE dm;
memset( &dm, 0, sizeof( dm ) );
dm.dmSize = sizeof( dm );
dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;
if ( parms.displayHz != 0 ) {
dm.dmDisplayFrequency = parms.displayHz;
dm.dmFields |= DM_DISPLAYFREQUENCY;
}
win32.cdsFullscreen = parms.fullScreen;
glConfig.isFullscreen = parms.fullScreen;
if ( parms.fullScreen ) {
exstyle = WS_EX_TOPMOST;
stylebits = WS_POPUP|WS_VISIBLE|WS_SYSMENU;
SetWindowLong( win32.hWnd, GWL_STYLE, stylebits );
SetWindowLong( win32.hWnd, GWL_EXSTYLE, exstyle );
dm.dmPelsWidth = parms.width;
dm.dmPelsHeight = parms.height;
dm.dmBitsPerPel = 32;
x = y = w = h = 0;
} else {
RECT r;
// adjust width and height for window border
r.bottom = parms.height;
r.left = 0;
r.top = 0;
r.right = parms.width;
w = r.right - r.left;
h = r.bottom - r.top;
x = win32.win_xpos.GetInteger();
y = win32.win_ypos.GetInteger();
// adjust window coordinates if necessary
// so that the window is completely on screen
if ( x + w > win32.desktopWidth ) {
x = ( win32.desktopWidth - w );
}
if ( y + h > win32.desktopHeight ) {
y = ( win32.desktopHeight - h );
}
if ( x < 0 ) {
x = 0;
}
if ( y < 0 ) {
y = 0;
}
dm.dmPelsWidth = win32.desktopWidth;
dm.dmPelsHeight = win32.desktopHeight;
dm.dmBitsPerPel = win32.desktopBitsPixel;
exstyle = 0;
stylebits = WINDOW_STYLE|WS_SYSMENU;
AdjustWindowRect (&r, stylebits, FALSE);
SetWindowLong( win32.hWnd, GWL_STYLE, stylebits );
SetWindowLong( win32.hWnd, GWL_EXSTYLE, exstyle );
common->Printf( "%i %i %i %i\n", x, y, w, h );
}
bool ret = ( ChangeDisplaySettings( &dm, parms.fullScreen ? CDS_FULLSCREEN : 0 ) == DISP_CHANGE_SUCCESSFUL );
SetWindowPos( win32.hWnd, parms.fullScreen ? HWND_TOPMOST : HWND_NOTOPMOST, x, y, w, h, parms.fullScreen ? SWP_NOSIZE | SWP_NOMOVE : SWP_SHOWWINDOW );
return ret;
}
/*
===================
GLimp_Shutdown
This routine does all OS specific shutdown procedures for the OpenGL
subsystem.
===================
*/
void GLimp_Shutdown( void ) {
const char *success[] = { "failed", "success" };
int retVal;
common->Printf( "Shutting down OpenGL subsystem\n" );
// set current context to NULL
if ( qwglMakeCurrent ) {
retVal = qwglMakeCurrent( NULL, NULL ) != 0;
common->Printf( "...wglMakeCurrent( NULL, NULL ): %s\n", success[retVal] );
}
// delete HGLRC
if ( win32.hGLRC ) {
retVal = qwglDeleteContext( win32.hGLRC ) != 0;
common->Printf( "...deleting GL context: %s\n", success[retVal] );
win32.hGLRC = NULL;
}
// release DC
if ( win32.hDC ) {
retVal = ReleaseDC( win32.hWnd, win32.hDC ) != 0;
common->Printf( "...releasing DC: %s\n", success[retVal] );
win32.hDC = NULL;
}
// destroy window
if ( win32.hWnd ) {
common->Printf( "...destroying window\n" );
ShowWindow( win32.hWnd, SW_HIDE );
DestroyWindow( win32.hWnd );
win32.hWnd = NULL;
}
// reset display settings
if ( win32.cdsFullscreen ) {
common->Printf( "...resetting display\n" );
ChangeDisplaySettings( 0, 0 );
win32.cdsFullscreen = false;
}
// close the thread so the handle doesn't dangle
if ( win32.renderThreadHandle ) {
common->Printf( "...closing smp thread\n" );
CloseHandle( win32.renderThreadHandle );
win32.renderThreadHandle = NULL;
}
// restore gamma
GLimp_RestoreGamma();
// shutdown QGL subsystem
QGL_Shutdown();
}
/*
=====================
GLimp_SwapBuffers
=====================
*/
void GLimp_SwapBuffers( void ) {
//
// wglSwapinterval is a windows-private extension,
// so we must check for it here instead of portably
//
if ( r_swapInterval.IsModified() ) {
r_swapInterval.ClearModified();
if ( wglSwapIntervalEXT ) {
wglSwapIntervalEXT( r_swapInterval.GetInteger() );
}
}
qwglSwapBuffers( win32.hDC );
//Sys_DebugPrintf( "*** SwapBuffers() ***\n" );
}
/*
===========================================================
SMP acceleration
===========================================================
*/
//#define REALLOC_DC
/*
===================
GLimp_ActivateContext
===================
*/
void GLimp_ActivateContext( void ) {
if ( !qwglMakeCurrent( win32.hDC, win32.hGLRC ) ) {
win32.wglErrors++;
}
}
/*
===================
GLimp_DeactivateContext
===================
*/
void GLimp_DeactivateContext( void ) {
qglFinish();
if ( !qwglMakeCurrent( win32.hDC, NULL ) ) {
win32.wglErrors++;
}
#ifdef REALLOC_DC
// makeCurrent NULL frees the DC, so get another
if ( ( win32.hDC = GetDC( win32.hWnd ) ) == NULL ) {
win32.wglErrors++;
}
#endif
}
/*
===================
GLimp_RenderThreadWrapper
===================
*/
static void GLimp_RenderThreadWrapper( void ) {
win32.glimpRenderThread();
// unbind the context before we die
qwglMakeCurrent( win32.hDC, NULL );
}
/*
=======================
GLimp_SpawnRenderThread
Returns false if the system only has a single processor
=======================
*/
bool GLimp_SpawnRenderThread( void (*function)( void ) ) {
SYSTEM_INFO info;
// check number of processors
GetSystemInfo( &info );
if ( info.dwNumberOfProcessors < 2 ) {
return false;
}
// create the IPC elements
win32.renderCommandsEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
win32.renderCompletedEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
win32.renderActiveEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
win32.glimpRenderThread = function;
win32.renderThreadHandle = CreateThread(
NULL, // LPSECURITY_ATTRIBUTES lpsa,
0, // DWORD cbStack,
(LPTHREAD_START_ROUTINE)GLimp_RenderThreadWrapper, // LPTHREAD_START_ROUTINE lpStartAddr,
0, // LPVOID lpvThreadParm,
0, // DWORD fdwCreate,
&win32.renderThreadId );
if ( !win32.renderThreadHandle ) {
common->Error( "GLimp_SpawnRenderThread: failed" );
}
SetThreadPriority( win32.renderThreadHandle, THREAD_PRIORITY_ABOVE_NORMAL );
#if 0
// make sure they always run on different processors
SetThreadAffinityMask( GetCurrentThread, 1 );
SetThreadAffinityMask( win32.renderThreadHandle, 2 );
#endif
return true;
}
//#define DEBUG_PRINTS
/*
===================
GLimp_BackEndSleep
===================
*/
void *GLimp_BackEndSleep( void ) {
void *data;
#ifdef DEBUG_PRINTS
OutputDebugString( "-->GLimp_BackEndSleep\n" );
#endif
ResetEvent( win32.renderActiveEvent );
// after this, the front end can exit GLimp_FrontEndSleep
SetEvent( win32.renderCompletedEvent );
WaitForSingleObject( win32.renderCommandsEvent, INFINITE );
ResetEvent( win32.renderCompletedEvent );
ResetEvent( win32.renderCommandsEvent );
data = win32.smpData;
// after this, the main thread can exit GLimp_WakeRenderer
SetEvent( win32.renderActiveEvent );
#ifdef DEBUG_PRINTS
OutputDebugString( "<--GLimp_BackEndSleep\n" );
#endif
return data;
}
/*
===================
GLimp_FrontEndSleep
===================
*/
void GLimp_FrontEndSleep( void ) {
#ifdef DEBUG_PRINTS
OutputDebugString( "-->GLimp_FrontEndSleep\n" );
#endif
WaitForSingleObject( win32.renderCompletedEvent, INFINITE );
#ifdef DEBUG_PRINTS
OutputDebugString( "<--GLimp_FrontEndSleep\n" );
#endif
}
volatile bool renderThreadActive;
/*
===================
GLimp_WakeBackEnd
===================
*/
void GLimp_WakeBackEnd( void *data ) {
int r;
#ifdef DEBUG_PRINTS
OutputDebugString( "-->GLimp_WakeBackEnd\n" );
#endif
win32.smpData = data;
if ( renderThreadActive ) {
common->FatalError( "GLimp_WakeBackEnd: already active" );
}
r = WaitForSingleObject( win32.renderActiveEvent, 0 );
if ( r == WAIT_OBJECT_0 ) {
common->FatalError( "GLimp_WakeBackEnd: already signaled" );
}
r = WaitForSingleObject( win32.renderCommandsEvent, 0 );
if ( r == WAIT_OBJECT_0 ) {
common->FatalError( "GLimp_WakeBackEnd: commands already signaled" );
}
// after this, the renderer can continue through GLimp_RendererSleep
SetEvent( win32.renderCommandsEvent );
r = WaitForSingleObject( win32.renderActiveEvent, 5000 );
if ( r == WAIT_TIMEOUT ) {
common->FatalError( "GLimp_WakeBackEnd: WAIT_TIMEOUT" );
}
#ifdef DEBUG_PRINTS
OutputDebugString( "<--GLimp_WakeBackEnd\n" );
#endif
}
//===================================================================
/*
===================
GLimp_ExtensionPointer
Returns a function pointer for an OpenGL extension entry point
===================
*/
GLExtension_t GLimp_ExtensionPointer( const char *name ) {
void (*proc)(void);
proc = (GLExtension_t)qwglGetProcAddress( name );
if ( !proc ) {
common->Printf( "Couldn't find proc address for: %s\n", name );
}
return proc;
}
#endif
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