void
ImageGL::registerAsCudaResource(int field_num)
{
// register the OpenGL resources that we'll use within CD
checkCudaErrors(cuGLRegisterBufferObject(gl_pbo_[field_num]));
getLastCudaDrvErrorMsg("cuGLRegisterBufferObject (gl_pbo_) failed");
bIsCudaResource_ = true;
}
// 1 plane float buffer
bool allocBuffer( PixelBufferObject &img, UInt2 &imgSize )
{
if( Size(img) != imgSize && imgSize != UInt2(0,0) )
{
// Allocate monitor PBO
glGenBuffersARB( 1, &(img.m_bufId) );
glBindBufferARB( GL_PIXEL_UNPACK_BUFFER_ARB, img.m_bufId );
glBufferDataARB( GL_PIXEL_UNPACK_BUFFER_ARB, Width(imgSize) * Height(imgSize) * sizeof(float), NULL, GL_STREAM_COPY);
// Register buffer for use with cuda
CUresult cerr = cuGLRegisterBufferObject( img.m_bufId );
checkError(cerr);
glBindBufferARB( GL_PIXEL_UNPACK_BUFFER_ARB, 0 );
SetSize(img, imgSize);
return true;
}
return false;
}
// TODO : separate allocation buffer and texture
static
bool allocBufferAndTexture( GLuint &buf, GLuint &tex, unsigned int width, unsigned int height, unsigned int depth )
{
// Texture
glGenTextures( 1, &tex );
GLenum err = glGetError(); assert( err == GL_NO_ERROR );
glBindTexture( GL_TEXTURE_RECTANGLE_NV, tex );
glTexParameterf( GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D( GL_TEXTURE_RECTANGLE_NV, 0, GL_RGBA8, width, height,0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glBindTexture( GL_TEXTURE_RECTANGLE_NV, 0 );
// Allocate monitor PBO ( pixel buffer object )
glGenBuffersARB( 1, &buf );
glBindBufferARB( GL_PIXEL_UNPACK_BUFFER_ARB, buf );
glBufferDataARB( GL_PIXEL_UNPACK_BUFFER_ARB, width * height * depth, NULL, GL_STREAM_COPY );
// Register buffer for use with cuda
CUresult cerr = cuGLRegisterBufferObject( buf );
checkError(cerr);
glBindBufferARB( GL_PIXEL_UNPACK_BUFFER_ARB, 0 );
return true;
}
