From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 42435] Suspected loss of varyings between shaders Date: Tue, 01 Nov 2011 22:27:29 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from annarchy.freedesktop.org (annarchy.freedesktop.org [131.252.210.176]) by gabe.freedesktop.org (Postfix) with ESMTP id CC4749E8B3 for ; Tue, 1 Nov 2011 15:27:29 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org https://bugs.freedesktop.org/show_bug.cgi?id=42435 --- Comment #4 from Alexander Sabourenkov 2011-11-01 15:27:29 PDT --- The workaround did not help r600g. Same black screen. In addition, the non-llvm swrast draws point sprites 60 pixels in size instead of requested 16 (my original shaders get texture sub-image size via varyings too), plus it draws solid-black-textured point sprites as single pixels. r600c (as of Oct 27 git, just before being axed) works though. Not knowing whether any given black screen is a bug, or legitimate undefined behaviour that just happens to work on some other renderer is driving me mad. I managed to cut down the test case to bare minimum. Usage: ./testbed shaderset is either "working" or "failing" - loads similarly named shaders. "working" shader set does texture sampling in fragment shader "failing" shader set does texture sampling in vertex shader and passes the color as a varying vec4. mesadriver is: hw - default, LIBGL_ALWAYS_SOFTWARE and LIBGL_DRIVERS_PATH unset. hw-alt - use .so from dri-alternates (x64-86 hardcoded, sorry). sw - LIBGL_ALWAYS_SOFTWARE=y sw-alt - as above, but use .so from dri-alternates. For the Oct 27 git these map to r600g, r600c, swrast, llvmpipe on my box. Of those: "failing" llvmpipe - works as intended, vertical colored bars (composed of 16x16 point sprites), one sprite is dark green - left unpainted intentionally. "working" llvmpipe - same (ok) "failing" DRI - ok "working" DRI - ok "failing" r600g - all sprites black "working" r600g - all sprites black "failing" old-swrast - single pixels instead of 16x16, but looks like color is right "working" old-swrast - same as "failing" The hardware is rv770 9440. I'd say there's a problem with r600g and a different one with old swrast. There's also intermittent display corruption mainly on areas in xterm redrawn (but not those that get scrolled up) immediately after launching the testcase. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.