lowlevel-blt-bench results for over_n_8888 (on ARMv6):
Before After
Mean StdDev Mean StdDev Confidence Change
L1 11.3 0.1 21.3 0.1 100.0% +89.0%
L2 10.0 0.1 17.5 0.5 100.0% +73.9%
M 8.6 0.0 14.1 0.0 100.0% +63.0%
HT 5.1 0.0 12.7 0.1 100.0% +148.8%
VT 4.9 0.0 12.4 0.1 100.0% +151.3%
R 4.8 0.0 12.0 0.1 100.0% +148.6%
RT 2.1 0.0 8.2 0.1 100.0% +290.1%
Trimmed cairo-pref-traces does not show any significant change for this patch,
reflecting the fact that over_n_8888 is barely used in the traces.
---
pixman/pixman-fast-path.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/pixman/pixman-fast-path.c b/pixman/pixman-fast-path.c
index 5d52b4a..680149c 100644
--- a/pixman/pixman-fast-path.c
+++ b/pixman/pixman-fast-path.c
@@ -1182,6 +1182,43 @@ fast_composite_src_memcpy (pixman_implementation_t *imp,
}
}
+static void
+fast_composite_over_n_8888 (pixman_implementation_t *imp,
+ pixman_composite_info_t *info)
+{
+ PIXMAN_COMPOSITE_ARGS (info);
+ uint32_t src, srca;
+ uint32_t *dst_line, *dst;
+ int dst_stride;
+ int32_t w;
+
+ src = _pixman_image_get_solid (imp, src_image, dest_image->bits.format);
+
+ srca = src >> 24;
+ if (src == 0)
+ return;
+ if (srca == 0xff)
+ {
+ fast_composite_solid_fill (imp, info);
+ return;
+ }
+
+ PIXMAN_IMAGE_GET_LINE (dest_image, dest_x, dest_y, uint32_t, dst_stride,
dst_line, 1);
+
+ while (height--)
+ {
+ dst = dst_line;
+ dst_line += dst_stride;
+ w = width;
+
+ while (w--)
+ {
+ *dst = over (src, *dst);
+ dst++;
+ }
+ }
+}
+
FAST_NEAREST (8888_8888_cover, 8888, 8888, uint32_t, uint32_t, SRC, COVER)
FAST_NEAREST (8888_8888_none, 8888, 8888, uint32_t, uint32_t, SRC, NONE)
FAST_NEAREST (8888_8888_pad, 8888, 8888, uint32_t, uint32_t, SRC, PAD)
@@ -1838,9 +1875,13 @@ static const pixman_fast_path_t c_fast_paths[] =
PIXMAN_STD_FAST_PATH (OVER, x8r8g8b8, a8, a8r8g8b8,
fast_composite_over_x888_8_8888),
PIXMAN_STD_FAST_PATH (OVER, x8b8g8r8, a8, x8b8g8r8,
fast_composite_over_x888_8_8888),
PIXMAN_STD_FAST_PATH (OVER, x8b8g8r8, a8, a8b8g8r8,
fast_composite_over_x888_8_8888),
+ PIXMAN_STD_FAST_PATH (OVER, solid, null, a8r8g8b8,
fast_composite_over_n_8888),
+ PIXMAN_STD_FAST_PATH (OVER, solid, null, x8r8g8b8,
fast_composite_over_n_8888),
PIXMAN_STD_FAST_PATH (OVER, a8r8g8b8, null, a8r8g8b8,
fast_composite_over_8888_8888),
PIXMAN_STD_FAST_PATH (OVER, a8r8g8b8, null, x8r8g8b8,
fast_composite_over_8888_8888),
PIXMAN_STD_FAST_PATH (OVER, a8r8g8b8, null, r5g6b5,
fast_composite_over_8888_0565),
+ PIXMAN_STD_FAST_PATH (OVER, solid, null, a8b8g8r8,
fast_composite_over_n_8888),
+ PIXMAN_STD_FAST_PATH (OVER, solid, null, x8b8g8r8,
fast_composite_over_n_8888),
PIXMAN_STD_FAST_PATH (OVER, a8b8g8r8, null, a8b8g8r8,
fast_composite_over_8888_8888),
PIXMAN_STD_FAST_PATH (OVER, a8b8g8r8, null, x8b8g8r8,
fast_composite_over_8888_8888),
PIXMAN_STD_FAST_PATH (OVER, a8b8g8r8, null, b5g6r5,
fast_composite_over_8888_0565),
--
1.7.10.4
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