Hello,
In my application I render into a PBO from CUDA and then draw it using a
texture like this:
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, _texture );
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, _pbo);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, _lastViewport.w,
_lastViewport.h, GL_RGB, GL_FLOAT, 0);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glBegin(GL_QUADS);
glTexCoord2f(0.0f,0.0f); glVertex2f(-1.0f,-1.0f);
glTexCoord2f(1.0f,0.0f); glVertex2f( 1.0f,-1.0f);
glTexCoord2f(1.0f,1.0f); glVertex2f( 1.0f, 1.0f);
glTexCoord2f(0.0f,1.0f); glVertex2f(-1.0f, 1.0f);
glEnd();
glDisable(GL_TEXTURE_2D);
My texture is defined:
glGenTextures( 1, &_texture );
glBindTexture( GL_TEXTURE_2D, _texture );
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, _lastViewport.w,
_lastViewport.h, 0, GL_RGB, GL_FLOAT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
*glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE, GL_REPLACE);*
I have noticed that exists a problem with accumBufferObject object. If
you have implemented the anti-aliasing in the same way as eqPly and you
have change a *GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE* from GL_MODULATE to
GL_REPLACE like me.
To make work my code, I had to add this line on
AccumBufferObject::_drawQuadWithTexture
void AccumBufferObject::_drawQuadWithTexture( Texture* texture,
const PixelViewport& pvp,
const GLfloat value )
{
texture->bind();
glDepthMask( false );
glDisable( GL_LIGHTING );
glEnable( GL_TEXTURE_RECTANGLE_ARB );
*glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); *
texture->applyWrap();
texture->applyZoomFilter( FILTER_NEAREST );
..........
}
Cheers
--
Carlos Duelo
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