mesa: Update gl_scissor_attrib to support ARB_viewport_array

Update Mesa and drivers to access updated gl_scissor_attrib.
Now have an enable bitfield and array of gl_scissor_rects.
Drivers have been updated to the new scissor enable state
attribute (gl_context.scissor.EnableFlags) but still treat it
as a single boolean which is okay as mesa will only use
bit 0 when communicating with a driver that does not support
ARB_viewport_array.

v2 (idr): Rebase fixes.

v3 (idr): Small code formatting fix suggsted by Ken.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 28f9c83..97cc5a2 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -364,11 +364,11 @@ clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
 static INLINE GLboolean
 is_scissor_enabled(struct gl_context *ctx, struct gl_renderbuffer *rb)
 {
-   return ctx->Scissor.Enabled &&
-          (ctx->Scissor.X > 0 ||
-           ctx->Scissor.Y > 0 ||
-           (unsigned) ctx->Scissor.Width < rb->Width ||
-           (unsigned) ctx->Scissor.Height < rb->Height);
+   return (ctx->Scissor.EnableFlags & 1) &&
+          (ctx->Scissor.ScissorArray[0].X > 0 ||
+           ctx->Scissor.ScissorArray[0].Y > 0 ||
+           (unsigned) ctx->Scissor.ScissorArray[0].Width < rb->Width ||
+           (unsigned) ctx->Scissor.ScissorArray[0].Height < rb->Height);
 }