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Serious-Engine/Sources/Engine/Graphics/Win32/Win32OpenGL.cpp

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/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
#ifdef PLATFORM_WIN32
#include <Engine/Engine.h>
static void FailFunction_t(const char *strName) {
ThrowF_t(TRANS("Required function %s not found."), strName);
}
void WIN_CheckError(BOOL bRes, const char *strDescription)
{
if( bRes) return;
DWORD dwWindowsErrorCode = GetLastError();
if( dwWindowsErrorCode==ERROR_SUCCESS) return; // ignore stupid 'successful' error
WarningMessage("%s: %s", strDescription, GetWindowsError(dwWindowsErrorCode));
}
static void OGL_SetFunctionPointers_t(HINSTANCE hiOGL)
{
const char *strName;
// get gl function pointers
#define DLLFUNCTION(dll, output, name, inputs, params, required) \
strName = #name; \
p##name = (output (__stdcall*) inputs) GetProcAddress( hi##dll, strName); \
if( required && p##name == NULL) FailFunction_t(strName);
#include "Engine/Graphics/gl_functions.h"
#undef DLLFUNCTION
}
// initialize OpenGL driver
BOOL CGfxLibrary::InitDriver_OGL( BOOL b3Dfx/*=FALSE*/)
{
ASSERT( gl_hiDriver==NONE);
UINT iOldErrorMode = SetErrorMode( SEM_NOOPENFILEERRORBOX|SEM_FAILCRITICALERRORS);
CTString strDriverFileName = b3Dfx ? "3DFXVGL.DLL" : "OPENGL32.DLL";
try
{ // if driver doesn't exists on disk
char strBuffer[_MAX_PATH+1];
char *strDummy;
int iRes = SearchPathA( NULL, strDriverFileName, NULL, _MAX_PATH, strBuffer, &strDummy);
if( iRes==0) ThrowF_t(TRANS("OpenGL driver '%s' not present"), strDriverFileName);
// load opengl library
gl_hiDriver = ::LoadLibraryA( strDriverFileName);
// if it cannot be loaded (although it is present on disk)
if( gl_hiDriver==NONE) {
// if it is 3dfx stand-alone driver
if( b3Dfx) {
// do a fatal error and inform user to deinstall it,
// since this loading attempt probably messed up the entire system
FatalError(TRANS( "3Dfx OpenGL driver '%s' is installed, but cannot be loaded!\n"
"If you previously had a 3Dfx card and it was removed,\n"
"please deinstall the driver and restart windows before\n"
"continuing.\n"), strDriverFileName);
} // fail!
ThrowF_t(TRANS("Cannot load OpenGL driver '%s'"), (const char *) strDriverFileName);
}
// prepare functions
OGL_SetFunctionPointers_t(gl_hiDriver);
}
catch( char *strError)
{ // didn't make it :(
if( gl_hiDriver!=NONE) FreeLibrary(gl_hiDriver);
gl_hiDriver = NONE;
CPrintF( TRANS("Error starting OpenGL: %s\n"), strError);
SetErrorMode(iOldErrorMode);
return FALSE;
}
// revert to old error mode
SetErrorMode(iOldErrorMode);
// if default driver
if( !b3Dfx) {
// use GDI functions
pwglSwapBuffers = ::SwapBuffers;
pwglSetPixelFormat = ::SetPixelFormat;
pwglChoosePixelFormat = ::ChoosePixelFormat;
// NOTE:
// some ICD implementations are not infact in OPENGL32.DLL, but in some
// other installed DLL, which is loaded when original OPENGL32.DLL from MS is
// loaded. For those, we in fact load OPENGL32.DLL from MS, so we must _not_
// call these functions directly, because they are in MS dll. We must call
// functions from GDI, which in turn call either OPENGL32.DLL, _or_ the client driver,
// as appropriate.
}
// done
return TRUE;
}
void CGfxLibrary::PlatformEndDriver_OGL(void)
{
// shut the driver down
if( go_hglRC!=NULL) {
if( pwglMakeCurrent!=NULL) {
BOOL bRes = pwglMakeCurrent(NULL, NULL);
WIN_CHECKERROR( bRes, "MakeCurrent(NULL, NULL)");
}
ASSERT( pwglDeleteContext!=NULL);
BOOL bRes = pwglDeleteContext(go_hglRC);
WIN_CHECKERROR( bRes, "DeleteContext");
go_hglRC = NULL;
}
}
// creates OpenGL drawing context
BOOL CGfxLibrary::CreateContext_OGL(HDC hdc)
{
if( !SetupPixelFormat_OGL( hdc, TRUE)) return FALSE;
go_hglRC = pwglCreateContext(hdc);
if( go_hglRC==NULL) {
WIN_CHECKERROR(0, "CreateContext");
return FALSE;
}
if( !pwglMakeCurrent(hdc, go_hglRC)) {
// NOTE: This error is sometimes reported without a reason on 3dfx hardware
// so we just have to ignore it.
//WIN_CHECKERROR(0, "MakeCurrent after CreateContext");
return FALSE;
}
return TRUE;
}
#define BACKOFF pwglMakeCurrent( NULL, NULL); \
pwglDeleteContext( hglrc); \
ReleaseDC( dummyhwnd, hdc); \
DestroyWindow( dummyhwnd); \
UnregisterClassA( classname, hInstance);
// helper for choosing t-buffer's pixel format
extern BOOL _TBCapability;
static INDEX ChoosePixelFormatTB( HDC hdc, const PIXELFORMATDESCRIPTOR *ppfd,
PIX pixResWidth, PIX pixResHeight)
{
_TBCapability = FALSE;
char *extensions = NULL;
char *wglextensions = NULL;
HGLRC hglrc;
HWND dummyhwnd;
WNDCLASSA cls;
HINSTANCE hInstance = GetModuleHandle(NULL);
LPCSTR classname = "dummyOGLwin";
cls.style = CS_OWNDC;
cls.lpfnWndProc = DefWindowProc;
cls.cbClsExtra = 0;
cls.cbWndExtra = 0;
cls.hInstance = hInstance;
cls.hIcon = LoadIcon(NULL, IDI_APPLICATION);
cls.hCursor = LoadCursor(NULL, IDC_WAIT);
cls.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
cls.lpszMenuName = NULL;
cls.lpszClassName = classname;
// didn't manage to register class?
if( !RegisterClassA(&cls)) return 0;
// create window fullscreen
//CPrintF( " Dummy window: %d x %d\n", pixResWidth, pixResHeight);
dummyhwnd = CreateWindowExA( WS_EX_TOPMOST, classname, "Dummy OGL window",
WS_POPUP|WS_VISIBLE, 0, 0, pixResWidth, pixResHeight,
NULL, NULL, hInstance, NULL);
// didn't make it?
if( dummyhwnd == NULL) {
UnregisterClassA( classname, hInstance);
return 0;
}
//CPrintF( " Dummy passed...\n");
hdc = GetDC(dummyhwnd);
// try to choose pixel format
int iPixelFormat = pwglChoosePixelFormat( hdc, ppfd);
if( !iPixelFormat) {
ReleaseDC( dummyhwnd, hdc);
DestroyWindow(dummyhwnd);
UnregisterClassA( classname, hInstance);
return 0;
}
//CPrintF( " Choose pixel format passed...\n");
// try to set pixel format
if( !pwglSetPixelFormat( hdc, iPixelFormat, ppfd)) {
ReleaseDC( dummyhwnd, hdc);
DestroyWindow(dummyhwnd);
UnregisterClassA( classname, hInstance);
return 0;
}
//CPrintF( " Set pixel format passed...\n");
// create context using the default accelerated pixelformat that was passed
hglrc = pwglCreateContext(hdc);
pwglMakeCurrent( hdc, hglrc);
// update the value list with information passed from the ppfd.
aiAttribList[ 9] = ppfd->cColorBits;
aiAttribList[11] = ppfd->cDepthBits;
aiAttribList[15] = _pGfx->go_ctSampleBuffers;
// get the extension list.
extensions = (char*)pglGetString(GL_EXTENSIONS);
// get the wgl extension list.
if( strstr((const char*)extensions, "WGL_EXT_extensions_string ") != NULL)
{ // windows extension string supported
pwglGetExtensionsStringARB = (char* (__stdcall*)(HDC))pwglGetProcAddress( "wglGetExtensionsStringARB");
if( pwglGetExtensionsStringARB == NULL) {
BACKOFF
return 0;
}
//CPrintF( " WGL extension string passed...\n");
// get WGL extension string
wglextensions = (char*)pwglGetExtensionsStringARB(hdc);
}
else {
BACKOFF
return 0;
}
// check for the pixel format and multisample extension strings
if( (strstr((const char*)wglextensions, "WGL_ARB_pixel_format ") != NULL) &&
(strstr((const char*)extensions, "GL_3DFX_multisample ") != NULL)) {
// 3dfx extensions present
_TBCapability = TRUE;
pwglChoosePixelFormatARB = (BOOL (__stdcall*)(HDC,const int*,const FLOAT*,UINT,int*,UINT*))pwglGetProcAddress( "wglChoosePixelFormatARB");
pwglGetPixelFormatAttribivARB = (BOOL (__stdcall*)(HDC,int,int,UINT,int*,int*) )pwglGetProcAddress( "wglGetPixelFormatAttribivARB");
pglTBufferMask3DFX = (void (__stdcall*)(GLuint))pwglGetProcAddress("glTBufferMask3DFX");
if( pwglChoosePixelFormatARB==NULL && pglTBufferMask3DFX==NULL) {
BACKOFF
return 0;
}
//CPrintF( " WGL choose pixel format present...\n");
int iAttribListNum = {WGL_NUMBER_PIXEL_FORMATS_EXT};
int iMaxFormats = 1; // default number to return
if( pwglGetPixelFormatAttribivARB!=NULL) {
// get total number of formats supported.
pwglGetPixelFormatAttribivARB( hdc, NULL, NULL, 1, &iAttribListNum, &iMaxFormats);
//CPrintF( "Max formats: %d\n", iMaxFormats);
}
UINT uiNumFormats;
int *piFormats = (int*)AllocMemory( sizeof(UINT) *iMaxFormats);
// try to get all formats that fit the pixel format criteria
if( !pwglChoosePixelFormatARB( hdc, piAttribList, NULL, iMaxFormats, piFormats, &uiNumFormats)) {
FreeMemory(piFormats);
BACKOFF
return 0;
}
//CPrintF( " WGL choose pixel format passed...\n");
// return the first match for now
iPixelFormat = 0;
if( uiNumFormats>0) {
iPixelFormat = piFormats[0];
//CPrintF( "Num formats: %d\n", uiNumFormats);
//CPrintF( "First format: %d\n", iPixelFormat);
}
FreeMemory(piFormats);
}
else
{ // wglChoosePixelFormatARB extension does not exist :(
iPixelFormat = 0;
}
BACKOFF
return iPixelFormat;
}
void *CGfxLibrary::OGL_GetProcAddress(const char *procname)
{
return(pwglGetProcAddress(procname));
}
// prepares pixel format for OpenGL context
BOOL CGfxLibrary::SetupPixelFormat_OGL( HDC hdc, BOOL bReport/*=FALSE*/)
{
int iPixelFormat = 0;
const PIX pixResWidth = gl_dmCurrentDisplayMode.dm_pixSizeI;
const PIX pixResHeight = gl_dmCurrentDisplayMode.dm_pixSizeJ;
const DisplayDepth dd = gl_dmCurrentDisplayMode.dm_ddDepth;
PIXELFORMATDESCRIPTOR pfd;
memset( &pfd, 0, sizeof(pfd));
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
// clamp depth/stencil values
extern INDEX gap_iDepthBits;
extern INDEX gap_iStencilBits;
if( gap_iDepthBits <12) gap_iDepthBits = 0;
else if( gap_iDepthBits <22) gap_iDepthBits = 16;
else if( gap_iDepthBits <28) gap_iDepthBits = 24;
else gap_iDepthBits = 32;
if( gap_iStencilBits<3) gap_iStencilBits = 0;
else if( gap_iStencilBits<7) gap_iStencilBits = 4;
else gap_iStencilBits = 8;
// set color/depth buffer values
pfd.cColorBits = (dd!=DD_16BIT) ? 32 : 16;
pfd.cDepthBits = gap_iDepthBits;
pfd.cStencilBits = gap_iStencilBits;
// must be required and works only in full screen via GDI functions
ogl_iTBufferEffect = Clamp( ogl_iTBufferEffect, 0L, 2L);
if( ogl_iTBufferEffect>0 && pixResWidth>0 && pixResHeight>0)
{ // lets T-buffer ... :)
//CPrintF( "TBuffer init...\n");
ogl_iTBufferSamples = (1L) << FastLog2(ogl_iTBufferSamples);
if( ogl_iTBufferSamples<2) ogl_iTBufferSamples = 4;
go_ctSampleBuffers = ogl_iTBufferSamples;
go_iCurrentWriteBuffer = 0;
iPixelFormat = ChoosePixelFormatTB( hdc, &pfd, pixResWidth, pixResHeight);
// need to reset the desktop resolution because CPFTB() resets it
BOOL bSuccess = CDS_SetMode( pixResWidth, pixResHeight, dd);
if( !bSuccess) iPixelFormat = 0;
// check T-buffer support
if( _TBCapability) pglGetIntegerv( GL_SAMPLES_3DFX, (GLint*)&go_ctSampleBuffers);
if( !iPixelFormat) { ogl_iTBufferEffect=0; CPrintF( TRANS("TBuffer initialization failed.\n")); }
else CPrintF( TRANS("TBuffer initialization passed (%d buffers in use).\n"), go_ctSampleBuffers);
}
// if T-buffer didn't make it, let's try thru regular path
if( !iPixelFormat) {
go_ctSampleBuffers = 0;
go_iCurrentWriteBuffer = 0;
iPixelFormat = pwglChoosePixelFormat( hdc, &pfd);
}
if( !iPixelFormat) {
WIN_CHECKERROR( 0, "ChoosePixelFormat");
return FALSE;
}
if( !pwglSetPixelFormat( hdc, iPixelFormat, &pfd)) {
WIN_CHECKERROR( 0, "SetPixelFormat");
return FALSE;
}
// test acceleration
memset( &pfd, 0, sizeof(pfd));
if( !pwglDescribePixelFormat( hdc, iPixelFormat, sizeof(pfd), &pfd)) return FALSE;
BOOL bGenericFormat = pfd.dwFlags & PFD_GENERIC_FORMAT;
BOOL bGenericAccelerated = pfd.dwFlags & PFD_GENERIC_ACCELERATED;
BOOL bHasAcceleration = (bGenericFormat && bGenericAccelerated) || // MCD
(!bGenericFormat && !bGenericAccelerated); // ICD
if( bHasAcceleration) gl_ulFlags |= GLF_HASACCELERATION;
else gl_ulFlags &= ~GLF_HASACCELERATION;
// done if report pixel format info isn't required
if( !bReport) return TRUE;
// prepare pixel type description
CTString strPixelType;
if( pfd.iPixelType==PFD_TYPE_RGBA) strPixelType = "TYPE_RGBA";
else if( pfd.iPixelType&PFD_TYPE_COLORINDEX) strPixelType = "TYPE_COLORINDEX";
else strPixelType = "unknown";
// prepare flags description
CTString strFlags = "";
if( pfd.dwFlags&PFD_DRAW_TO_WINDOW) strFlags += "DRAW_TO_WINDOW ";
if( pfd.dwFlags&PFD_DRAW_TO_BITMAP) strFlags += "DRAW_TO_BITMAP ";
if( pfd.dwFlags&PFD_SUPPORT_GDI) strFlags += "SUPPORT_GDI ";
if( pfd.dwFlags&PFD_SUPPORT_OPENGL) strFlags += "SUPPORT_OPENGL ";
if( pfd.dwFlags&PFD_GENERIC_ACCELERATED) strFlags += "GENERIC_ACCELERATED ";
if( pfd.dwFlags&PFD_GENERIC_FORMAT) strFlags += "GENERIC_FORMAT ";
if( pfd.dwFlags&PFD_NEED_PALETTE) strFlags += "NEED_PALETTE ";
if( pfd.dwFlags&PFD_NEED_SYSTEM_PALETTE) strFlags += "NEED_SYSTEM_PALETTE ";
if( pfd.dwFlags&PFD_DOUBLEBUFFER) strFlags += "DOUBLEBUFFER ";
if( pfd.dwFlags&PFD_STEREO) strFlags += "STEREO ";
if( pfd.dwFlags&PFD_SWAP_LAYER_BUFFERS) strFlags += "SWAP_LAYER_BUFFERS ";
if( pfd.dwFlags&PFD_DEPTH_DONTCARE) strFlags += "DEPTH_DONTCARE ";
if( pfd.dwFlags&PFD_DOUBLEBUFFER_DONTCARE) strFlags += "DOUBLEBUFFER_DONTCARE ";
if( pfd.dwFlags&PFD_STEREO_DONTCARE) strFlags += "STEREO_DONTCARE ";
if( pfd.dwFlags&PFD_SWAP_COPY) strFlags += "SWAP_COPY ";
if( pfd.dwFlags&PFD_SWAP_EXCHANGE) strFlags += "SWAP_EXCHANGE ";
if( strFlags=="") strFlags = "none";
// output pixel format description to console (for debugging purposes)
CPrintF( TRANS("\nPixel Format Description:\n"));
CPrintF( TRANS(" Number: %d (%s)\n"), iPixelFormat, strPixelType);
CPrintF( TRANS(" Flags: %s\n"), strFlags);
CPrintF( TRANS(" Color bits: %d (%d:%d:%d:%d)\n"), pfd.cColorBits,
pfd.cRedBits, pfd.cGreenBits, pfd.cBlueBits, pfd.cAlphaBits);
CPrintF( TRANS(" Depth bits: %d (%d for stencil)\n"), pfd.cDepthBits, pfd.cStencilBits);
gl_iCurrentDepth = pfd.cDepthBits; // keep depth bits
// all done
CPrintF( "\n");
return TRUE;
}
// prepare current viewport for rendering thru OpenGL
BOOL CGfxLibrary::SetCurrentViewport_OGL(CViewPort *pvp)
{
// if must init entire opengl
if( gl_ulFlags & GLF_INITONNEXTWINDOW)
{
gl_ulFlags &= ~GLF_INITONNEXTWINDOW;
// reopen window
pvp->CloseCanvas();
pvp->OpenCanvas();
// init now
CTempDC tdc(pvp->vp_hWnd);
if( !CreateContext_OGL(tdc.hdc)) return FALSE;
gl_pvpActive = pvp; // remember as current viewport (must do that BEFORE InitContext)
InitContext_OGL();
pvp->vp_ctDisplayChanges = gl_ctDriverChanges;
return TRUE;
}
// if window was not set for this driver
if( pvp->vp_ctDisplayChanges<gl_ctDriverChanges)
{
// reopen window
pvp->CloseCanvas();
pvp->OpenCanvas();
// set it
CTempDC tdc(pvp->vp_hWnd);
if( !SetupPixelFormat_OGL(tdc.hdc)) return FALSE;
pvp->vp_ctDisplayChanges = gl_ctDriverChanges;
}
if( gl_pvpActive!=NULL) {
// fail, if only one window is allowed (3dfx driver), already initialized and trying to set non-primary viewport
const BOOL bOneWindow = (gl_gaAPI[GAT_OGL].ga_adaAdapter[gl_iCurrentAdapter].da_ulFlags & DAF_ONEWINDOW);
if( bOneWindow && gl_pvpActive->vp_hWnd!=NULL && gl_pvpActive->vp_hWnd!=pvp->vp_hWnd) return FALSE;
// no need to set context if it is the same window as last time
if( gl_pvpActive->vp_hWnd==pvp->vp_hWnd) return TRUE;
}
// try to set context to this window
pwglMakeCurrent( NULL, NULL);
CTempDC tdc(pvp->vp_hWnd);
// fail, if cannot set context to this window
if( !pwglMakeCurrent( tdc.hdc, go_hglRC)) return FALSE;
// remember as current window
gl_pvpActive = pvp;
return TRUE;
}
#endif // PLATFORM_WIN32
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