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From 86870ff530b5e435034bd80207e5758466d96cff Mon Sep 17 00:00:00 2001
From: Siarhei Siamashka <siarhei.siamashka@nokia.com>
Date: Wed, 18 Nov 2009 06:08:48 +0200
Subject: [PATCH 6/6] Support of overlapping src/dst for pixman_blt_neon
---
pixman/pixman-arm-neon.c | 63 ++++++++++++++++++++++++++++++++++++++-------
1 files changed, 53 insertions(+), 10 deletions(-)
diff --git a/pixman/pixman-arm-neon.c b/pixman/pixman-arm-neon.c
index 495fda4..c632ff5 100644
--- a/pixman/pixman-arm-neon.c
+++ b/pixman/pixman-arm-neon.c
@@ -357,26 +357,66 @@
int width,
int height)
{
- if (src_bpp != dst_bpp)
+ uint8_t * src_bytes;
+ uint8_t * dst_bytes;
+ int bpp;
+
+ if (src_bpp != dst_bpp || src_bpp & 7)
return FALSE;
+ bpp = src_bpp >> 3;
+ width *= bpp;
+ src_stride *= 4;
+ dst_stride *= 4;
+ src_bytes = (uint8_t *)src_bits + src_y * src_stride + src_x * bpp;
+ dst_bytes = (uint8_t *)dst_bits + dst_y * dst_stride + dst_x * bpp;
+
+ if (src_bpp != 16 && src_bpp != 32)
+ {
+ pixman_blt_helper (src_bytes, dst_bytes, src_stride, dst_stride,
+ width, height);
+ return TRUE;
+ }
+
+ if (src_bytes < dst_bytes && src_bytes + src_stride * height > dst_bytes)
+ {
+ src_bytes += src_stride * height - src_stride;
+ dst_bytes += dst_stride * height - dst_stride;
+ dst_stride = -dst_stride;
+ src_stride = -src_stride;
+
+ if (src_bytes + width > dst_bytes)
+ {
+ /* TODO: reverse scanline copy using NEON */
+ while (--height >= 0)
+ {
+ memmove (dst_bytes, src_bytes, width);
+ dst_bytes += dst_stride;
+ src_bytes += src_stride;
+ }
+ return TRUE;
+ }
+ }
+
switch (src_bpp)
{
case 16:
pixman_composite_src_0565_0565_asm_neon (
- width, height,
- (uint16_t *)(((char *) dst_bits) +
- dst_y * dst_stride * 4 + dst_x * 2), dst_stride * 2,
- (uint16_t *)(((char *) src_bits) +
- src_y * src_stride * 4 + src_x * 2), src_stride * 2);
+ width >> 1,
+ height,
+ (uint16_t *) dst_bytes,
+ dst_stride >> 1,
+ (uint16_t *) src_bytes,
+ src_stride >> 1);
return TRUE;
case 32:
pixman_composite_src_8888_8888_asm_neon (
- width, height,
- (uint32_t *)(((char *) dst_bits) +
- dst_y * dst_stride * 4 + dst_x * 4), dst_stride,
- (uint32_t *)(((char *) src_bits) +
- src_y * src_stride * 4 + src_x * 4), src_stride);
+ width >> 2,
+ height,
+ (uint32_t *) dst_bytes,
+ dst_stride >> 2,
+ (uint32_t *) src_bytes,
+ src_stride >> 2);
return TRUE;
default:
return FALSE;
--
1.6.2.4
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