[gegl] gegl/buffer: remove some function call overhead from sampler upkeep

[Øyvind Kolås <ok src gnome org>]

commit 995e17f28b820e97ecf5fb73a0172fc419a5a056
Author: Øyvind Kolås <pippin gimp org>
Date:   Wed Jan 10 01:19:08 2018 +0100

    gegl/buffer: remove some function call overhead from sampler upkeep

 gegl/buffer/gegl-sampler.c |   53 ----------------------------------------
 gegl/buffer/gegl-sampler.h |   58 ++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 54 insertions(+), 57 deletions(-)
---
diff --git a/gegl/buffer/gegl-sampler.c b/gegl/buffer/gegl-sampler.c
index 3428906..9569f3a 100644
--- a/gegl/buffer/gegl-sampler.c
+++ b/gegl/buffer/gegl-sampler.c
@@ -246,59 +246,6 @@ dispose (GObject *gobject)
   G_OBJECT_CLASS (gegl_sampler_parent_class)->dispose (gobject);
 }
 
-GeglRectangle _gegl_sampler_compute_rectangle (GeglSampler *sampler,
-                                               gint         x,
-                                               gint         y,
-                                               gint         level_no)
-{
-  GeglRectangle rectangle;
-  GeglSamplerLevel *level = &sampler->level[level_no];
-
-  rectangle.width  = level->context_rect.width + 2;
-  rectangle.height = level->context_rect.height + 2;
-
-  /* grow in direction of prediction */
-  if (level->delta_x * level->delta_x >
-      level->delta_y * level->delta_y)
-  {
-    rectangle.width *= 2;
-  }
-  else
-  {
-    rectangle.height *= 2;
-  }
-
-  rectangle.x = x + level->context_rect.x;
-  rectangle.y = y + level->context_rect.y;
-
-  rectangle.x      -= 1;
-  rectangle.y      -= 1;
-  rectangle.width  += 2;
-  rectangle.height += 2;
-
-  //fprintf (stderr, "{%f %f}", level->delta_x, level->delta_y);
-
-#if 1
-  /* shift area based on prediction */
-  if (level->delta_x >=0.01)
-    rectangle.x -= rectangle.width * 0.3;
-  if (level->delta_y >=0.01)
-    rectangle.y -= rectangle.height * 0.3;
-#endif
-
-  if (rectangle.width >= GEGL_SAMPLER_MAXIMUM_WIDTH)
-    rectangle.width = GEGL_SAMPLER_MAXIMUM_WIDTH;
-  if (rectangle.height >= GEGL_SAMPLER_MAXIMUM_HEIGHT)
-    rectangle.height = GEGL_SAMPLER_MAXIMUM_HEIGHT;
-
-  if (rectangle.width < level->context_rect.width)
-    rectangle.width = level->context_rect.width;
-  if (rectangle.height < level->context_rect.height)
-    rectangle.height = level->context_rect.height;
-
-  return rectangle;
-}
-
 
 gfloat *
 gegl_sampler_get_from_mipmap (GeglSampler    *sampler,
diff --git a/gegl/buffer/gegl-sampler.h b/gegl/buffer/gegl-sampler.h
index efb9e08..bc2052f 100644
--- a/gegl/buffer/gegl-sampler.h
+++ b/gegl/buffer/gegl-sampler.h
@@ -105,10 +105,60 @@ gfloat * _gegl_sampler_get_ptr        (GeglSampler     *sampler,
                                        gint             y,
                                        GeglAbyssPolicy  repeat_mode);
 
-GeglRectangle _gegl_sampler_compute_rectangle (GeglSampler *sampler,
-                                               gint         x,
-                                               gint         y,
-                                               gint         level);
+static inline GeglRectangle _gegl_sampler_compute_rectangle (
+                                      GeglSampler *sampler,
+                                      gint         x,
+                                      gint         y,
+                                      gint         level_no)
+{
+  GeglRectangle rectangle;
+  GeglSamplerLevel *level = &sampler->level[level_no];
+
+  rectangle.width  = level->context_rect.width + 2;
+  rectangle.height = level->context_rect.height + 2;
+
+  /* grow in direction of prediction */
+  if (level->delta_x * level->delta_x >
+      level->delta_y * level->delta_y)
+  {
+    rectangle.width *= 2;
+  }
+  else
+  {
+    rectangle.height *= 2;
+  }
+
+  rectangle.x = x + level->context_rect.x;
+  rectangle.y = y + level->context_rect.y;
+
+  rectangle.x      -= 1;
+  rectangle.y      -= 1;
+  rectangle.width  += 2;
+  rectangle.height += 2;
+
+  //fprintf (stderr, "{%f %f}", level->delta_x, level->delta_y);
+
+#if 1
+  /* shift area based on prediction */
+  if (level->delta_x >=0.01)
+    rectangle.x -= rectangle.width * 0.3;
+  if (level->delta_y >=0.01)
+    rectangle.y -= rectangle.height * 0.3;
+#endif
+
+  if (rectangle.width >= GEGL_SAMPLER_MAXIMUM_WIDTH)
+    rectangle.width = GEGL_SAMPLER_MAXIMUM_WIDTH;
+  if (rectangle.height >= GEGL_SAMPLER_MAXIMUM_HEIGHT)
+    rectangle.height = GEGL_SAMPLER_MAXIMUM_HEIGHT;
+
+  if (rectangle.width < level->context_rect.width)
+    rectangle.width = level->context_rect.width;
+  if (rectangle.height < level->context_rect.height)
+    rectangle.height = level->context_rect.height;
+
+  return rectangle;
+}
+
 
 /*
  * Gets a pointer to the center pixel, within a buffer that has a