From 4cf5bfc72a724fb653c48338b93e91dccea238af Mon Sep 17 00:00:00 2001 From: Siarhei Siamashka Date: Wed, 18 Nov 2009 06:08:48 +0200 Subject: [PATCH 4/5] Support of overlapping src/dst for pixman_blt_neon --- pixman/pixman-arm-neon.c | 62 +++++++++++++++++++++++++++++++++++++-------- 1 files changed, 51 insertions(+), 11 deletions(-) diff --git a/pixman/pixman-arm-neon.c b/pixman/pixman-arm-neon.c index 6808b36..7feee1d 100644 --- a/pixman/pixman-arm-neon.c +++ b/pixman/pixman-arm-neon.c @@ -168,26 +168,66 @@ pixman_blt_neon (uint32_t *src_bits, 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; -- 1.6.6.1