Attachment 27133 Details for Bug 22475 – swap-buffer-composite-test.c

swap-buffer-composite-test.c

swap-buffer-composite-test.c (text/plain), 3.04 KB, created by Barry Scott on 2009-06-25 07:08:34 UTC

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Creator: Barry Scott

Created: 2009-06-25 07:08:34 UTC

Size: 3.04 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <X11/Xlib.h>
>#include <X11/extensions/Xcomposite.h>
>#include <GL/glx.h>
>#include <GL/glu.h>
>#include <GL/glxext.h>
>#include <sys/time.h>
>
>static double timeOfDay()
>{
>    struct timeval t;
>    gettimeofday( &t, NULL );
>    return (double)(t.tv_sec) + (double)( t.tv_usec )/1000000.0;
>}
>
>int main(void)
>{
>    Display *display = XOpenDisplay( NULL );
>    int screen = DefaultScreen( display );
>
>    int width = DisplayWidth( display, screen );
>    int height = DisplayHeight( display, screen );
>
>    if( !glXQueryExtension( display, NULL, NULL ) )
>    {
>        fprintf( stderr, "No GLX extension\n" );
>        return 1;
>    }
>
>    int attrib_list[] = { GLX_RGBA,
>                          GLX_DOUBLEBUFFER,
>                          GLX_DEPTH_SIZE, 0,
>                          GLX_STENCIL_SIZE, 0,
>                          GLX_ALPHA_SIZE, 0,
>                          None };
>
>    XVisualInfo *visual_info = glXChooseVisual( display, screen, attrib_list );
>
>    int dummy;
>    XCompositeQueryVersion( display, &dummy, &dummy );
>
>    Window window = XCompositeGetOverlayWindow( display, RootWindow( display, screen ) );
>
>    GLXContext glContext = glXCreateContext( display, visual_info, NULL, True );
>    if( !glXIsDirect( display, glContext ) )
>    {
>        fprintf( stderr, "Not direct\n" );
>        return 1;
>    }
>    if( !glXMakeCurrent( display, window, glContext ) )
>    {
>        fprintf( stderr, "Could not make context current\n" );
>        return 2;
>    }
>
>    glClearColor( 0.0, 0.0, 0.0, 0.0 );
>    glShadeModel( GL_FLAT );
>    glViewport( 0, 0, width, height );
>    glMatrixMode( GL_PROJECTION );
>    glLoadIdentity();
>    gluOrtho2D( 0, width, height, 0 );
>    glFinish();
>
>    double start_time = timeOfDay();
>    double lastTime = timeOfDay();
>    int last_dropped_frames = 0;
>    int i=0;
>    for( ;; ++i )
>    {
>        glClear( GL_COLOR_BUFFER_BIT );
>
>        /* Animated rectangle */
>        {
>            const int rect_width = 256;
>            int x = (i * 6) % (width - rect_width);
>            glColor4f( 1.0, 1.0, 1.0, 1.0 );
>            glRecti( x, 0, x + rect_width, height );
>        }
>
>        /* Signal here - back buffer is drawn, request it be flipped
>         * to front buffer. Note that the glFinish above will stall us
>         * until this glXSwapBuffers and all drawing has happened. */
>        glXSwapBuffers( display, window );
>
>        double now = timeOfDay();
>        double run_time = now - start_time;
>        int expected_frame = (int)(run_time*60.);
>        int dropped_frames = expected_frame - i;
>
>        double interval = (now - lastTime) * 1000;
>        if( dropped_frames != last_dropped_frames )
>        {
>            printf( "Delta %7.3lfms error %7.3lf frame %6d expected_frame %6d dropped_frames %4d (1 dropped every %.3fs)\n",
>                interval, interval - (1000./60.),
>                i, expected_frame,
>                dropped_frames, ((double)expected_frame)/((double)dropped_frames)/60. );
>
>            last_dropped_frames = dropped_frames;
>        }
>        lastTime = now;
>    }
>    return 0;
>}

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Attachments on bug 22475: 27133 | 27134 | 31358

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