The driver is ati radeon 8.12, the kernel object loaded is fglrx.ko <div class="gmail_quote">2009/1/22 Corbin Simpson <<a href="mailto:mostawesomedude@gmail.com">mostawesomedude@gmail.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div class="Wj3C7c">Amos Tibaldi wrote: > Hello, > I am trying to use the Xv extension in order to display images on windows. > I have obtained the image formats with > <a href="http://xvc.fo" target="_blank">xvc.fo</a> = XvListImageFormats( xvc.display, xvc.port, (int *)&formats ); > and I have chosen the format > id: 0x59565955 (UYVY) > guid: 55595659-0000-0010-8000-00aa00389b71 > bits per pixel: 16 > number of planes: 1 > type: YUV (packed) > > I'd like to convert from RGB to UYVY and I have found that for the struct > > typedef struct { > int id; /* Unique descriptor for the format */ > int type; /* XvRGB, XvYUV */ > int byte_order; /* LSBFirst, MSBFirst */ > char guid[16]; /* Globally Unique IDentifier */ > int bits_per_pixel; > int format; /* XvPacked, XvPlanar */ > int num_planes; > > /* for RGB formats only */ > int depth; > unsigned int red_mask; > unsigned int green_mask; > unsigned int blue_mask; > > /* for YUV formats only */ > unsigned int y_sample_bits; > unsigned int u_sample_bits; > unsigned int v_sample_bits; > unsigned int horz_y_period; > unsigned int horz_u_period; > unsigned int horz_v_period; > unsigned int vert_y_period; > unsigned int vert_u_period; > unsigned int vert_v_period; > char component_order[32]; /* eg. UYVY */ > int scanline_order; /* XvTopToBottom, XvBottomToTop */ > } XvImageFormatValues; > > that image format has: ysb 8; usb 8; vsb 8; hyp 1; hup 2; hvp 2; vyp 1; vup > 1; vvp 1; 'UYVY'slo: 0 > > So I'm trying to convert the bytes from rgb with: > > > void RGBToUYVY(unsigned short int r, > unsigned short int g, > unsigned short int b, > unsigned short int * u, > unsigned short int * y, > unsigned short int * v) > { > //cout << "r=" << r << " g=" << g << " b=" << b; > r &= 0x00FF; g &= 0x00FF; b &= 0x00FF; > *y = (unsigned short > int)(0.299f*(float)r+0.587f*(float)g+0.114f*(float)b); > *u = (unsigned short > int)(-0.147f*(float)r-0.289f*(float)g+0.436f*(float)b); > *v = (unsigned short > int)(0.615f*(float)r-0.515f*(float)g-0.100f*(float)b); > *y &= 0x00FF; > *u &= 0x00FF; > *v &= 0x00FF; > //cout << " y=" << *y << " u=" << *u << " v=" << *v <<endl; > } > > and to display the image with > void XVWindow::Redraw() > { > unsigned short int u, y, v; > RGBToUYVY(255,255,0,&u,&y,&v); > unsigned short int thecolor = u << 12 | y << 8 | v << 4 | y; > > for ( int y=0; y<ImageHeight; y++ ) > for ( int x=0; x<ImageWidth; x++ ) > ((unsigned short int *)BGimage->data)[ y * ImageWidth + x ] = > thecolor; > > counter++; > XvPutImage( xvc.display, xvc.port, window, gc, > BGimage, 0, 0, ImageWidth, ImageHeight, > 0, 0, WindowWidth, WindowHeight ); > } > > but the colors are always different. I have tried to use the blue, the red > and the green to see if I could obtain them separately but the mapping was > always wrong and different colours were showing on the window with respect > to those that I'd like to use in RGB. > > What can I do? Is my RGB to UYVY correct? Why do I obtain on the screen > different colours. There are some kind of manual on how to map colors with > XV images? </div></div>Which driver, exactly? Most drivers provide RGB Xv formats, and those that don't probably could be hacked to add it. ~ C. </blockquote></div> -- Amos Tibaldi