Mesa (floating): mesa: document known possible deviations from ARB_color_buffer_float

[Luca Barbieri]

Module: Mesa
Branch: floating
Commit: 2e678451193e4ce43e8ff3a1cf0ff65242efc4ad
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2e678451193e4ce43e8ff3a1cf0ff65242efc4ad

Author: Luca Barbieri <luca at luca-barbieri.com>
Date:   Tue Aug 31 16:50:57 2010 +0200

mesa: document known possible deviations from ARB_color_buffer_float

---

 docs/ARB_color_buffer_float.txt |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/docs/ARB_color_buffer_float.txt b/docs/ARB_color_buffer_float.txt
new file mode 100644
index 0000000..645b223
--- /dev/null
+++ b/docs/ARB_color_buffer_float.txt
@@ -0,0 +1,5 @@
+Known issues in the ARB_color_buffer_float implementation:
+- The alpha test is incorrectly performed before conversion to target format in softpipe and llvmpipe
+- Rendering to multiple render targets, some fixed-point, some floating-point, with FIXED_ONLY fragment clamping and polygon smooth enabled may write incorrect values to the fixed point buffers (depends on spec interpretation)
+- For fragment programs with ARB_fog_* options, colors are clamped before fog application regardless of the fragment clamping setting (this depends on spec interpretation)
+