vrend: Warn on unsupported point size

The size of 1.0 is supported since it is the default, while the
size of 0.0f is invalid so we don't have to warn about it.

Signed-off-by: Jakob Bornecrantz <jakob.bornecrantz@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/vrend_renderer.c

@@ -501,8 +501,9 @@ static void __report_core_warn(const char *fname, struct vrend_context *ctx, enu
 #define GLES_WARN_STIPPLE 1
 #define GLES_WARN_POLYGON_MODE 2
 #define GLES_WARN_DEPTH_RANGE 3
+#define GLES_WARN_POINT_SIZE 4
 
-static const char *vrend_gles_warn_strings[] = { "None", "Stipple", "Polygon Mode", "Depth Range" };
+static const char *vrend_gles_warn_strings[] = { "None", "Stipple", "Polygon Mode", "Depth Range", "Point Size" };
 
 static void __report_gles_warn(const char *fname, struct vrend_context *ctx, enum virgl_ctx_errors error, uint32_t value)
 {
@@ -3391,12 +3392,20 @@ static void vrend_hw_emit_rs(struct vrend_context *ctx)
       glEnable(GL_DEPTH_CLAMP);
    }
 
-   if (state->point_size_per_vertex) {
+   if (vrend_state.use_gles) {
+      /* guest send invalid glPointSize parameter */
+      if (!state->point_size_per_vertex &&
+          state->point_size != 1.0f &&
+          state->point_size != 0.0f) {
+         report_gles_warn(ctx, GLES_WARN_POINT_SIZE, 0);
+      }
+   } else if (state->point_size_per_vertex) {
       glEnable(GL_PROGRAM_POINT_SIZE);
    } else {
       glDisable(GL_PROGRAM_POINT_SIZE);
-      if (state->point_size)
+      if (state->point_size) {
          glPointSize(state->point_size);
+      }
    }
 
    if (state->rasterizer_discard != ctx->sub->hw_rs_state.rasterizer_discard) {