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implement concurrent rendering on X11. Still a little flickery when switching in and out of threaded mode; not sure why yet.

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This commit is contained in:
Glenn Maynard
2006-01-27 09:21:43 +00:00
parent 4a2d23bcbe
commit f4f326f893
2 changed files with 48 additions and 2 deletions
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stepmania/src/arch/LowLevelWindow/LowLevelWindow_X11.cpp
+42 -2
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@@ -20,6 +20,10 @@
#include <X11/extensions/XTest.h>
#endif
static GLXContext g_pContext = NULL;
static GLXContext g_pBackgroundContext = NULL;
static Window g_AltWindow = 0;
static LocalizedString FAILED_CONNECTION_XSERVER( "LowLevelWindow_X11", "Failed to establish a connection with the X server'" );
LowLevelWindow_X11::LowLevelWindow_X11()
{
@@ -130,6 +134,9 @@ RString LowLevelWindow_X11::TryVideoMode( const VideoModeParams &p, bool &bNewDe
// So, let's recreate the window when changing that state.
if( !X11Helper::MakeWindow(xvi->screen, xvi->depth, xvi->visual, p.width, p.height, !p.windowed) )
return "Failed to create the window.";
g_AltWindow = X11Helper::CreateWindow(xvi->screen, xvi->depth, xvi->visual, p.width, p.height, !p.windowed);
ASSERT( g_AltWindow );
m_bWindowIsOpen = true;
@@ -137,9 +144,10 @@ RString LowLevelWindow_X11::TryVideoMode( const VideoModeParams &p, bool &bNewDe
XChangeProperty( X11Helper::Dpy, X11Helper::Win, XA_WM_NAME, XA_STRING, 8, PropModeReplace,
reinterpret_cast<unsigned char*>(szWindowTitle), strlen(szWindowTitle) );
GLXContext ctxt = glXCreateContext( X11Helper::Dpy, xvi, NULL, True );
g_pContext = glXCreateContext( X11Helper::Dpy, xvi, NULL, True );
g_pBackgroundContext = glXCreateContext( X11Helper::Dpy, xvi, g_pContext, True );
glXMakeCurrent( X11Helper::Dpy, X11Helper::Win, ctxt );
glXMakeCurrent( X11Helper::Dpy, X11Helper::Win, g_pContext );
XMapWindow( X11Helper::Dpy, X11Helper::Win );
@@ -296,6 +304,38 @@ void LowLevelWindow_X11::GetDisplayResolutions( DisplayResolutions &out ) const
}
}
bool LowLevelWindow_X11::SupportsThreadedRendering()
{
return g_pBackgroundContext != NULL;
}
void LowLevelWindow_X11::BeginConcurrentRenderingMainThread()
{
/* Move the main thread, which is going to be loading textures, etc. but
* not rendering, to an undisplayed window. This results in smoother
* rendering. */
bool b = glXMakeCurrent( X11Helper::Dpy, g_AltWindow, g_pContext );
ASSERT(b);
}
void LowLevelWindow_X11::EndConcurrentRenderingMainThread()
{
bool b = glXMakeCurrent( X11Helper::Dpy, X11Helper::Win, g_pContext );
ASSERT(b);
}
void LowLevelWindow_X11::BeginConcurrentRendering()
{
bool b = glXMakeCurrent( X11Helper::Dpy, X11Helper::Win, g_pBackgroundContext );
ASSERT(b);
}
void LowLevelWindow_X11::EndConcurrentRendering()
{
bool b = glXMakeCurrent( X11Helper::Dpy, None, NULL );
ASSERT(b);
}
/*
* (c) 2005 Ben Anderson
* All rights reserved.