[Mesa-stable] [PATCH] st/mesa: increase viewport bounds limits for GL4 hw

[Ilia Mirkin]

According to the ARB_viewport_array spec, GL4 limit is higher than the
GL3 limit. Also take this opportunity to fix the GL3 limit.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: "11.0" <mesa-stable at lists.freedesktop.org>
---
 src/mesa/state_tracker/st_extensions.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 17f572f..884761c 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -873,8 +873,13 @@ void st_init_extensions(struct pipe_screen *screen,
 
    consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
    if (consts->MaxViewports >= 16) {
-      consts->ViewportBounds.Min = -16384.0;
-      consts->ViewportBounds.Max = 16384.0;
+      if (glsl_feature_level >= 400) {
+         consts->ViewportBounds.Min = -32768.0;
+         consts->ViewportBounds.Max = 32767.0;
+      } else {
+         consts->ViewportBounds.Min = -16384.0;
+         consts->ViewportBounds.Max = 16383.0;
+      }
       extensions->ARB_viewport_array = GL_TRUE;
       extensions->ARB_fragment_layer_viewport = GL_TRUE;
       if (extensions->AMD_vertex_shader_layer)
-- 
2.4.6