diff options
Diffstat (limited to 'progs')
| -rw-r--r-- | progs/tests/drawbuffers.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/progs/tests/drawbuffers.c b/progs/tests/drawbuffers.c index d75a870c26b..7a19933e627 100644 --- a/progs/tests/drawbuffers.c +++ b/progs/tests/drawbuffers.c @@ -43,6 +43,8 @@ Display(void) glUseProgram_func(Program); + glEnable(GL_DEPTH_TEST); + /* draw to user framebuffer */ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, FBobject); @@ -68,18 +70,23 @@ Display(void) glPopMatrix(); /* read from user framebuffer */ - /* bottom half = colorbuffer 0 */ + /* left half = colorbuffer 0 */ glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); - glReadPixels(0, 0, Width, Height / 2, GL_RGBA, GL_UNSIGNED_BYTE, + glPixelStorei(GL_PACK_ROW_LENGTH, Width); + glPixelStorei(GL_PACK_SKIP_PIXELS, 0); + glReadPixels(0, 0, Width / 2, Height, GL_RGBA, GL_UNSIGNED_BYTE, buffer); - /* top half = colorbuffer 1 */ + + /* right half = colorbuffer 1 */ glReadBuffer(GL_COLOR_ATTACHMENT1_EXT); - glReadPixels(0, Height/2, Width, Height - Height / 2, + glPixelStorei(GL_PACK_SKIP_PIXELS, Width / 2); + glReadPixels(Width / 2, 0, Width - Width / 2, Height, GL_RGBA, GL_UNSIGNED_BYTE, - buffer + Width * (Height / 2) * 4); + buffer); /* draw to window */ glUseProgram_func(0); + glDisable(GL_DEPTH_TEST); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); glWindowPos2iARB(0, 0); glDrawPixels(Width, Height, GL_RGBA, GL_UNSIGNED_BYTE, buffer); |