1 files changed, 105 insertions, 0 deletions
diff --git a/app/operations/layer-modes/gimpoperationlayermode-composite-sse2.c b/app/operations/layer-modes/gimpoperationlayermode-composite-sse2.c
new file mode 100644
index 0000000..2630751
--- /dev/null
+++ b/app/operations/layer-modes/gimpoperationlayermode-composite-sse2.c
@@ -0,0 +1,105 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationlayermode-composite-sse2.c
+ * Copyright (C) 2017 Michael Natterer <mitch@gimp.org>
+ *               2017 Øyvind Kolås <pippin@gimp.org>
+ *               2017 Ell
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+#include <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationlayermode-composite.h"
+
+
+#if COMPILE_SSE2_INTRINISICS
+
+/* SSE2 */
+#include <emmintrin.h>
+
+
+/*  non-subtractive compositing functions.  these functions expect comp[ALPHA]
+ *  to be the same as layer[ALPHA].  when in[ALPHA] or layer[ALPHA] are zero,
+ *  the value of comp[RED..BLUE] is unconstrained (in particular, it may be
+ *  NaN).
+ */
+
+
+void
+gimp_operation_layer_mode_composite_clip_to_backdrop_sse2 (const gfloat *in,
+                                                           const gfloat *layer,
+                                                           const gfloat *comp,
+                                                           const gfloat *mask,
+                                                           gfloat        opacity,
+                                                           gfloat       *out,
+                                                           gint          samples)
+{
+  if ((((uintptr_t)in)   | /* alignment check */
+       ((uintptr_t)comp) |
+       ((uintptr_t)out)   ) & 0x0F)
+    {
+      gimp_operation_layer_mode_composite_clip_to_backdrop (in, layer, comp,
+                                                            mask, opacity, out,
+                                                            samples);
+    }
+  else
+    {
+      const __v4sf *v_in      = (const __v4sf*) in;
+      const __v4sf *v_comp    = (const __v4sf*) comp;
+            __v4sf *v_out     = (__v4sf*) out;
+      const __v4sf  v_one     =  _mm_set1_ps (1.0f);
+      const __v4sf  v_opacity =  _mm_set1_ps (opacity);
+
+      while (samples--)
+        {
+          __v4sf alpha, rgba_in, rgba_comp;
+
+          rgba_in   = *v_in ++;
+          rgba_comp = *v_comp++;
+
+          alpha = (__v4sf)_mm_shuffle_epi32((__m128i)rgba_comp,_MM_SHUFFLE(3,3,3,3)) * v_opacity;
+
+          if (mask)
+            {
+              alpha = alpha * _mm_set1_ps (*mask++);
+            }
+
+          if (rgba_in[ALPHA] != 0.0f && _mm_ucomineq_ss (alpha, _mm_setzero_ps ()))
+            {
+              __v4sf out_pixel, out_pixel_rbaa, out_alpha;
+
+              out_alpha      = (__v4sf)_mm_shuffle_epi32((__m128i)rgba_in,_MM_SHUFFLE(3,3,3,3));
+              out_pixel      = rgba_comp * alpha + rgba_in * (v_one - alpha);
+              out_pixel_rbaa = _mm_shuffle_ps (out_pixel, out_alpha, _MM_SHUFFLE (3, 3, 2, 0));
+              out_pixel      = _mm_shuffle_ps (out_pixel, out_pixel_rbaa, _MM_SHUFFLE (2, 1, 1, 0));
+
+              *v_out++ = out_pixel;
+            }
+          else
+            {
+              *v_out ++ = rgba_in;
+            }
+        }
+    }
+}
+
+#endif /* COMPILE_SSE2_INTRINISICS */