[gthumb] cairo scale: simplified vector operations code

[Paolo Bacchilega <paobac src gnome org>]

commit 53c02c73ba19f1e8efcf5766f9f8a3eed195ffee
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Nov 29 17:08:53 2020 +0100

    cairo scale: simplified vector operations code

 gthumb/cairo-scale.c | 25 ++++++++++---------------
 1 file changed, 10 insertions(+), 15 deletions(-)
---
diff --git a/gthumb/cairo-scale.c b/gthumb/cairo-scale.c
index 4c4a37ab..fab1c004 100644
--- a/gthumb/cairo-scale.c
+++ b/gthumb/cairo-scale.c
@@ -36,11 +36,7 @@ typedef ScaleReal (*weight_func_t) (ScaleReal distance);
 #ifdef HAVE_VECTOR_OPERATIONS
 
 
-typedef ScaleReal v4r __attribute__ ((vector_size(sizeof(ScaleReal)*4)));
-typedef union {
-       v4r       v;
-       ScaleReal r[4];
-} r4vector;
+typedef ScaleReal v4r __attribute__ ((vector_size(sizeof(ScaleReal) * 4)));
 
 
 #endif /* HAVE_VECTOR_OPERATIONS */
@@ -394,7 +390,7 @@ horizontal_scale_transpose (cairo_surface_t *image,
                int        i;
                int        temp;
 #ifdef HAVE_VECTOR_OPERATIONS
-               r4vector   v_pixel, v_rgba;
+               v4r        v_pixel, v_rgba;
 #endif /* HAVE_VECTOR_OPERATIONS */
 
                if (resize_filter->task != NULL) {
@@ -440,19 +436,18 @@ horizontal_scale_transpose (cairo_surface_t *image,
 
 #ifdef HAVE_VECTOR_OPERATIONS
 
-                       v_rgba.v = (v4r) { 0.0, 0.0, 0.0, 0.0 };
+                       v_rgba = (v4r) { 0.0, 0.0, 0.0, 0.0 };
                        for (i = 0; i < n; i++) {
-                               v_pixel.v = (v4r) { p_src_pixel[0], p_src_pixel[1], p_src_pixel[2], 
p_src_pixel[3] };
-                               v_rgba.v = v_rgba.v + (v_pixel.v * weights[i]);
-
+                               v_pixel = (v4r) { p_src_pixel[0], p_src_pixel[1], p_src_pixel[2], 
p_src_pixel[3] };
+                               v_rgba = v_rgba + (v_pixel * weights[i]);
                                p_src_pixel += 4;
                        }
-                       v_rgba.v = v_rgba.v + 0.5;
+                       v_rgba = v_rgba + 0.5;
 
-                       p_dest_pixel[0] = CLAMP_PIXEL (v_rgba.r[0]);
-                       p_dest_pixel[1] = CLAMP_PIXEL (v_rgba.r[1]);
-                       p_dest_pixel[2] = CLAMP_PIXEL (v_rgba.r[2]);
-                       p_dest_pixel[3] = CLAMP_PIXEL (v_rgba.r[3]);
+                       p_dest_pixel[0] = CLAMP_PIXEL (v_rgba[0]);
+                       p_dest_pixel[1] = CLAMP_PIXEL (v_rgba[1]);
+                       p_dest_pixel[2] = CLAMP_PIXEL (v_rgba[2]);
+                       p_dest_pixel[3] = CLAMP_PIXEL (v_rgba[3]);
 
 #else /* ! HAVE_VECTOR_OPERATIONS */