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pbuffers & anti-aliasing
September 07, 2004 02:03 AM
Hello, does anyone know how to use antialiasing with pbuffers? If I enable antialiasing in my driver settings, nothing happens when I render to a pbuffer. Graphics card: Geforce FX 5950 Ultra 256MB Regards, Lyve
_____________________________________http://www.winmaze.de, a 3D shoot em up in OpenGL, nice graphics, multiplayer, chat rooms, a nice community, worth visiting! ;)http://www.spheretris.tk, an upcoming Tetrisphere clone for windows, a 3D tetris game on a sphere with powerful graphics for Geforce FX and similar graphics cards.
1,060
September 07, 2004 06:02 AM
I don't believe p-buffers can have a multisample buffer associated with them in which case the answer would be no, you can't do antialiasing with pbuffers.
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September 08, 2004 03:11 AM
Found it, it works with GL_ARB_multisample.
@joanusdmentia: Seems to work, I've created my pbuffer by searching for a pixelformat that contains multisampling and it worked.
Lyve
@joanusdmentia: Seems to work, I've created my pbuffer by searching for a pixelformat that contains multisampling and it worked.
Lyve
_____________________________________http://www.winmaze.de, a 3D shoot em up in OpenGL, nice graphics, multiplayer, chat rooms, a nice community, worth visiting! ;)http://www.spheretris.tk, an upcoming Tetrisphere clone for windows, a 3D tetris game on a sphere with powerful graphics for Geforce FX and similar graphics cards.
122
October 08, 2004 01:48 AM
Hi Lyve,
I have the same problem as you had. I'm rendering in a pbuffer and would like to enable Anti-Aliasing for that pbuffer.
What pixelformat did you use for your buffer?
thx
I have the same problem as you had. I'm rendering in a pbuffer and would like to enable Anti-Aliasing for that pbuffer.
What pixelformat did you use for your buffer?
thx
October 08, 2004 03:03 AM
Hi durito
This is my code that is working now:
This is my code that is working now:
bool CPBuffer::Create( unsigned int _width, unsigned int _height, HDC _hdcScreen, HGLRC _hrcScreen, unsigned int _numAntialiasingSamples ){ if( !WGLEW_ARB_pbuffer || !WGLEW_ARB_pixel_format ) return false; // pbuffer extension isn't supported m_hdcScreen = _hdcScreen; m_hrcScreen = _hrcScreen; // Get ready to query for a suitable pixel format that meets our // minimum requirements. int iattributes[2*MAX_ATTRIBS]; float fattributes[2*MAX_ATTRIBS]; int nfattribs = 0; int niattribs = 0; // Attribute arrays must be 0 terminated. for simplicity, first // just zero-out the array then fill from left to right. for ( int a = 0; a < 2*MAX_ATTRIBS; a++ ) { iattributes[a] = 0; fattributes[a] = 0; } // Since we are trying to create a pbuffer, the pixel format we // request (and subsequently use) must be "p-buffer capable". iattributes[2*niattribs ] = WGL_DRAW_TO_PBUFFER_ARB; iattributes[2*niattribs+1] = true; niattribs++; // We require a minimum of 24-bit depth. iattributes[2*niattribs ] = WGL_DEPTH_BITS_ARB; iattributes[2*niattribs+1] = 16; niattribs++; // We require a minimum of 8-bits for each R, G, B, and A. iattributes[2*niattribs ] = WGL_RED_BITS_ARB; iattributes[2*niattribs+1] = 8; niattribs++; iattributes[2*niattribs ] = WGL_GREEN_BITS_ARB; iattributes[2*niattribs+1] = 8; niattribs++; iattributes[2*niattribs ] = WGL_BLUE_BITS_ARB; iattributes[2*niattribs+1] = 8; niattribs++; iattributes[2*niattribs ] = WGL_ALPHA_BITS_ARB; iattributes[2*niattribs+1] = 8; niattribs++; iattributes[2*niattribs ] = WGL_ACCELERATION_ARB; iattributes[2*niattribs+1] = WGL_FULL_ACCELERATION_ARB; niattribs++; iattributes[2*niattribs ] = WGL_PIXEL_TYPE_ARB; iattributes[2*niattribs+1] = WGL_TYPE_RGBA_ARB; niattribs++; if( _numAntialiasingSamples ) { iattributes[2*niattribs ] = WGL_SAMPLES_ARB; iattributes[2*niattribs+1] = _numAntialiasingSamples; niattribs++; } // Now obtain a list of pixel formats that meet these minimum // requirements. HDC hdc = wglGetCurrentDC(); int pformat[MAX_PFORMATS]; unsigned int nformats; if ( !wglChoosePixelFormatARB( hdc, iattributes, fattributes, MAX_PFORMATS, pformat, &nformats ) ) { // pbuffer creation error: Couldn't find a suitable pixel format return false; } if( nformats < 1 ) return false; // no pbuffer format that meets our criteria (hm....) m_width = _width; m_height = _height; MAKEPOWEROFTWOADD(m_width); MAKEPOWEROFTWOADD(m_height); m_u = (float)_width / (float)m_width; m_v = (float)_height / (float)m_height; int iattribs[] = { 0 }; m_hPBuffer = wglCreatePbufferARB( hdc, pformat[0], m_width, m_height, iattribs ); m_hdcPBuffer = wglGetPbufferDCARB( m_hPBuffer ); m_hrcPBuffer = wglCreateContext( m_hdcPBuffer ); ASSERT( m_hPBuffer && m_hdcPBuffer && m_hrcPBuffer ); return true;}
_____________________________________http://www.winmaze.de, a 3D shoot em up in OpenGL, nice graphics, multiplayer, chat rooms, a nice community, worth visiting! ;)http://www.spheretris.tk, an upcoming Tetrisphere clone for windows, a 3D tetris game on a sphere with powerful graphics for Geforce FX and similar graphics cards.
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