zink: Use u_default_get_sample_position

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22383>

diff --git a/src/gallium/drivers/zink/zink_context.c b/src/gallium/drivers/zink/zink_context.c
index f8ad140..3af5eeb 100644 (file)
--- a/src/gallium/drivers/zink/zink_context.c
+++ b/src/gallium/drivers/zink/zink_context.c
@@ -45,6 +45,7 @@
 #include "util/format/u_format.h"
 #include "util/u_helpers.h"
 #include "util/u_inlines.h"
+#include "util/u_sample_positions.h"
 #include "util/u_string.h"
 #include "util/u_thread.h"
 #include "util/perf/u_trace.h"
@@ -1195,68 +1196,7 @@ zink_get_sample_position(struct pipe_context *ctx,
 {
    /* TODO: handle this I guess */
    assert(zink_screen(ctx->screen)->info.props.limits.standardSampleLocations);
-   /* from 26.4. Multisampling */
-   switch (sample_count) {
-   case 0:
-   case 1: {
-      float pos[][2] = { {0.5,0.5}, };
-      out_value[0] = pos[sample_index][0];
-      out_value[1] = pos[sample_index][1];
-      break;
-   }
-   case 2: {
-      float pos[][2] = { {0.75,0.75},
-                        {0.25,0.25}, };
-      out_value[0] = pos[sample_index][0];
-      out_value[1] = pos[sample_index][1];
-      break;
-   }
-   case 4: {
-      float pos[][2] = { {0.375, 0.125},
-                        {0.875, 0.375},
-                        {0.125, 0.625},
-                        {0.625, 0.875}, };
-      out_value[0] = pos[sample_index][0];
-      out_value[1] = pos[sample_index][1];
-      break;
-   }
-   case 8: {
-      float pos[][2] = { {0.5625, 0.3125},
-                        {0.4375, 0.6875},
-                        {0.8125, 0.5625},
-                        {0.3125, 0.1875},
-                        {0.1875, 0.8125},
-                        {0.0625, 0.4375},
-                        {0.6875, 0.9375},
-                        {0.9375, 0.0625}, };
-      out_value[0] = pos[sample_index][0];
-      out_value[1] = pos[sample_index][1];
-      break;
-   }
-   case 16: {
-      float pos[][2] = { {0.5625, 0.5625},
-                        {0.4375, 0.3125},
-                        {0.3125, 0.625},
-                        {0.75, 0.4375},
-                        {0.1875, 0.375},
-                        {0.625, 0.8125},
-                        {0.8125, 0.6875},
-                        {0.6875, 0.1875},
-                        {0.375, 0.875},
-                        {0.5, 0.0625},
-                        {0.25, 0.125},
-                        {0.125, 0.75},
-                        {0.0, 0.5},
-                        {0.9375, 0.25},
-                        {0.875, 0.9375},
-                        {0.0625, 0.0}, };
-      out_value[0] = pos[sample_index][0];
-      out_value[1] = pos[sample_index][1];
-      break;
-   }
-   default:
-      unreachable("unhandled sample count!");
-   }
+   u_default_get_sample_position(ctx, sample_count, sample_index, out_value);
 }
 
 static void