r600g: fix polygon offset scale

The value was copied from r300g, which uses 1/12 subpixels, but this hw
uses 1/16 subpixels.

Should fix piglit: gl-1.4-polygon-offset (formerly a glean test)
(untested, ported from radeonsi)

Reviewed-by: Edward O'Callaghan <eocallaghan at alterapraxis.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Cc: mesa-stable@lists.freedesktop.org

diff --git a/src/gallium/drivers/r600/evergreen_state.c b/src/gallium/drivers/r600/evergreen_state.c
index f7a76f6..95987ee 100644 (file)
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -485,7 +485,7 @@ static void *evergreen_create_rs_state(struct pipe_context *ctx,
 
        /* offset */
        rs->offset_units = state->offset_units;
-       rs->offset_scale = state->offset_scale * 12.0f;
+       rs->offset_scale = state->offset_scale * 16.0f;
        rs->offset_enable = state->offset_point || state->offset_line || state->offset_tri;
 
        if (state->point_size_per_vertex) {

diff --git a/src/gallium/drivers/r600/r600_state.c b/src/gallium/drivers/r600/r600_state.c
index 8488188..5cc2283 100644 (file)
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -473,7 +473,7 @@ static void *r600_create_rs_state(struct pipe_context *ctx,
 
        /* offset */
        rs->offset_units = state->offset_units;
-       rs->offset_scale = state->offset_scale * 12.0f;
+       rs->offset_scale = state->offset_scale * 16.0f;
        rs->offset_enable = state->offset_point || state->offset_line || state->offset_tri;
 
        if (state->point_size_per_vertex) {