diff options
Diffstat (limited to 'progs/trivial/readpixels.c')
| -rw-r--r-- | progs/trivial/readpixels.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/progs/trivial/readpixels.c b/progs/trivial/readpixels.c index b1f04f81d9..65fb81ed48 100644 --- a/progs/trivial/readpixels.c +++ b/progs/trivial/readpixels.c @@ -57,6 +57,14 @@ static void Draw(void) glVertex3f( 0.0, 0.9, -30.0); glEnd(); + glBegin(GL_QUADS); + glColor3f(1, 1, 1); + glVertex2f(-1.0, -1.0); + glVertex2f(-0.9, -1.0); + glVertex2f(-0.9, -0.9); + glVertex2f(-1.0, -0.9); + glEnd(); + glReadPixels(0, 0, Width, Height, GL_RGBA, GL_FLOAT, image); printf("Pixel(0,0) = %f, %f, %f, %f\n", image[0], image[1], image[2], image[3]); |