cogl: Remove always-set COGL_FEATURE_ID_POINT_SPRITE

https://gitlab.gnome.org/GNOME/mutter/merge_requests/866

cogl/cogl/cogl-context.c

@@ -408,8 +408,7 @@ cogl_context_new (CoglDisplay *display,
      pipeline to track whether any layers have point sprite coords
      enabled. We don't need to do this for GL3 or GLES2 because point
      sprites are handled using a builtin varying in the shader. */
-  if (_cogl_has_private_feature (context, COGL_PRIVATE_FEATURE_GL_FIXED) &&
-      cogl_has_feature (context, COGL_FEATURE_ID_POINT_SPRITE))
+  if (_cogl_has_private_feature (context, COGL_PRIVATE_FEATURE_GL_FIXED))
     GE (context, glEnable (GL_POINT_SPRITE));
 
   _cogl_list_init (&context->fences);

cogl/cogl/cogl-context.h

@@ -185,8 +185,6 @@ cogl_is_context (void *object);
  * @COGL_FEATURE_ID_UNSIGNED_INT_INDICES: Set if
  *     %COGL_INDICES_TYPE_UNSIGNED_INT is supported in
  *     cogl_indices_new().
- * @COGL_FEATURE_ID_POINT_SPRITE: Whether
- *     cogl_pipeline_set_layer_point_sprite_coords_enabled() is supported.
  * @COGL_FEATURE_ID_MAP_BUFFER_FOR_READ: Whether cogl_buffer_map() is
  *     supported with CoglBufferAccess including read support.
  * @COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE: Whether cogl_buffer_map() is
@@ -214,7 +212,6 @@ typedef enum _CoglFeatureID
   COGL_FEATURE_ID_OFFSCREEN_MULTISAMPLE,
   COGL_FEATURE_ID_ONSCREEN_MULTIPLE,
   COGL_FEATURE_ID_UNSIGNED_INT_INDICES,
-  COGL_FEATURE_ID_POINT_SPRITE,
   COGL_FEATURE_ID_MAP_BUFFER_FOR_READ,
   COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE,
   COGL_FEATURE_ID_SWAP_BUFFERS_EVENT,

cogl/cogl/cogl-pipeline-layer-state.c

@@ -613,30 +613,6 @@ cogl_pipeline_set_layer_point_sprite_coords_enabled (CoglPipeline *pipeline,
 
   g_return_val_if_fail (cogl_is_pipeline (pipeline), FALSE);
 
-  /* Don't allow point sprite coordinates to be enabled if the driver
-     doesn't support it */
-  if (enable && !cogl_has_feature (ctx, COGL_FEATURE_ID_POINT_SPRITE))
-    {
-      if (error)
-        {
-          g_set_error_literal (error,
-                               COGL_SYSTEM_ERROR,
-                               COGL_SYSTEM_ERROR_UNSUPPORTED,
-                               "Point sprite texture coordinates are enabled for "
-                               "a layer but the GL driver does not support it.");
-        }
-      else
-        {
-          static gboolean warning_seen = FALSE;
-          if (!warning_seen)
-            g_warning ("Point sprite texture coordinates are enabled "
-                       "for a layer but the GL driver does not support it.");
-          warning_seen = TRUE;
-        }
-
-      return FALSE;
-    }
-
   /* Note: this will ensure that the layer exists, creating one if it
    * doesn't already.
    *

cogl/cogl/cogl-pipeline-layer-state.h

@@ -432,10 +432,6 @@ cogl_pipeline_get_layer_mag_filter (CoglPipeline *pipeline,
  * have 1.0,1.0. If @enable is %FALSE then the coordinates will be
  * fixed for the entire point.
  *
- * This function will only work if %COGL_FEATURE_ID_POINT_SPRITE is
- * available. If the feature is not available then the function will
- * return %FALSE and set @error.
- *
  * Return value: %TRUE if the function succeeds, %FALSE otherwise.
  * Since: 2.0
  * Stability: unstable

cogl/cogl/cogl-snippet.h

@@ -294,8 +294,7 @@ G_BEGIN_DECLS
  *    will be the bottom right. Note that there is currently a bug in
  *    Cogl where when rendering to an offscreen buffer these
  *    coordinates will be upside-down. The value is undefined when not
- *    rendering points. This builtin can only be used if the
- *    %COGL_FEATURE_ID_POINT_SPRITE feature is available.
+ *    rendering points.
  *   </para></glossdef>
  *  </glossentry>
  * </glosslist>

cogl/cogl/driver/gl/gl/cogl-driver-gl.c

@@ -438,7 +438,6 @@ _cogl_driver_update_features (CoglContext *ctx,
   COGL_FLAGS_SET (private_features, COGL_PRIVATE_FEATURE_PBOS, TRUE);
 
   flags |= COGL_FEATURE_POINT_SPRITE;
-  COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
 
   flags |= (COGL_FEATURE_MAP_BUFFER_FOR_READ |
             COGL_FEATURE_MAP_BUFFER_FOR_WRITE);

cogl/cogl/driver/gl/gles/cogl-driver-gles.c

@@ -311,7 +311,6 @@ _cogl_driver_update_features (CoglContext *context,
   COGL_FLAGS_SET (private_features, COGL_PRIVATE_FEATURE_ALPHA_TEXTURES, TRUE);
 
   flags |= COGL_FEATURE_POINT_SPRITE;
-  COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_POINT_SPRITE, TRUE);
 
   if (context->glGenRenderbuffers)
     {

cogl/test-fixtures/test-utils.c

@@ -30,12 +30,6 @@ check_flags (TestFlags flags,
       return FALSE;
     }
 
-  if (flags & TEST_REQUIREMENT_POINT_SPRITE &&
-      !cogl_has_feature (test_ctx, COGL_FEATURE_ID_POINT_SPRITE))
-    {
-      return FALSE;
-    }
-
   if (flags & TEST_REQUIREMENT_MAP_WRITE &&
       !cogl_has_feature (test_ctx, COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE))
     {