i965: Support GL_CLAMP natively on Broadwell.

[mesa.git] / src / mesa / drivers / dri / i965 / brw_wm_sampler_state.c

diff --git a/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c b/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c
index 6f8dde4a29b2f94e3079592f2fba936c21d57501..8a4bfead5503099ca01eef213515f1298d3e7efa 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c
@@ -55,9 +55,16 @@ translate_wrap_mode(struct brw_context *brw, GLenum wrap, bool using_nearest)
       /* GL_CLAMP is the weird mode where coordinates are clamped to
        * [0.0, 1.0], so linear filtering of coordinates outside of
        * [0.0, 1.0] give you half edge texel value and half border
-       * color.  The fragment shader will clamp the coordinates, and
-       * we set clamp_border here, which gets the result desired.  We
-       * just use clamp(_to_edge) for nearest, because for nearest
+       * color.
+       *
+       * Gen8+ supports this natively.
+       */
+      if (brw->gen >= 8)
+         return GEN8_TEXCOORDMODE_HALF_BORDER;
+
+      /* On Gen4-7.5, we clamp the coordinates in the fragment shader
+       * and set clamp_border here, which gets the result desired.
+       * We just use clamp(_to_edge) for nearest, because for nearest
        * clamping to 1.0 gives border color instead of the desired
        * edge texels.
        */