modetest: Use a more interesting test pattern.

diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
index 1706641..d750f4c 100644 (file)
--- a/tests/modetest/modetest.c
+++ b/tests/modetest/modetest.c
@@ -251,6 +251,7 @@ void set_mode(int connector_id, char *mode_str)
        drm_intel_bo *bo;
        unsigned int fb_id, *fb_ptr;
        int i, j, size, ret, width, height;
+       div_t d;
 
        /* First, find the connector & mode */
        for (i = 0; i < resources->count_connectors; i++) {
@@ -336,9 +337,11 @@ void set_mode(int connector_id, char *mode_str)
 
        fb_ptr = bo->virtual;
 
-       /* paint the buffer blue */
-       for (i = 0; i < width * height; i++)
-               fb_ptr[i] = 0xff;
+       /* paint the buffer with colored tiles */
+       for (i = 0; i < width * height; i++) {
+               d = div(i, width);
+               fb_ptr[i] = 0x00130502 * (d.quot >> 6) + 0x000a1120 * (d.rem >> 6);
+       }
 
        ret = drmModeAddFB(fd, width, height, 32, 32, width * 4, bo->handle,
                           &fb_id);