mesa: Set gl_constants::MinMapBufferAlignment

Leaving it set to zero isn't really correct since every allocation has
at least an alignment of 1 byte.  It also caused a problem in the i965
driver after I removed the MAX(64, ...) from the alignment calculation.
That's what I get for changing a patch without retesting it. :(

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73907
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: Lu Hua <huax.lu@intel.com>

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 7c3b2d74f7ca5691c7e6501c032ef21617a27e61..b7cd568668585156f8fb07ba204feb609bccb815 100644 (file)
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -587,6 +587,7 @@ _mesa_init_constants(struct gl_context *ctx)
    ctx->Const.MaxSpotExponent = 128.0;
    ctx->Const.MaxViewportWidth = MAX_VIEWPORT_WIDTH;
    ctx->Const.MaxViewportHeight = MAX_VIEWPORT_HEIGHT;
+   ctx->Const.MinMapBufferAlignment = 1;
 
    /* Driver must override these values if ARB_viewport_array is supported. */
    ctx->Const.MaxViewports = 1;