gallium: Split out PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE.

Some hardware can do PIPE_TEX_WRAP_MIRROR_REPEAT but not
PIPE_TEX_WRAP_MIRROR_CLAMP and PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER.

Drivers for such hardware would like to advertise support for
ARB_texture_mirror_clamp_to_edge but not EXT_texture_mirror_clamp.

This commit adds a new PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE bit,
changes the extension enable to be based on that, and enables it
in all upstream drivers which supported PIPE_CAP_TEXTURE_MIRROR_CLAMP
(so they continue supporting this mode).

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 6caa7d5f351..485248261df 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -40,8 +40,10 @@ The integer capabilities:
   for a 3D texture.
 * ``PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS``: The maximum number of mipmap levels available
   for a cubemap.
-* ``PIPE_CAP_TEXTURE_MIRROR_CLAMP``: Whether mirrored texture coordinates with clamp
-  are supported.
+* ``PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE``: Whether mirrored texture coordinates are
+  supported with the clamp-to-edge wrap mode.
+* ``PIPE_CAP_TEXTURE_MIRROR_CLAMP``: Whether mirrored texture coordinates are supported
+  with clamp or clamp-to-border wrap modes.
 * ``PIPE_CAP_BLEND_EQUATION_SEPARATE``: Whether alpha blend equations may be different
   from color blend equations, in :ref:`Blend` state.
 * ``PIPE_CAP_SM3``: Whether the vertex shader and fragment shader support equivalent