recipes/xorg-lib/pixman-0.17.8/0006-Support-of-overlapping-src-dst-for-pixman_blt_neon.patch

   1 From 86870ff530b5e435034bd80207e5758466d96cff Mon Sep 17 00:00:00 2001
   2 From: Siarhei Siamashka <siarhei.siamashka@nokia.com>
   3 Date: Wed, 18 Nov 2009 06:08:48 +0200
   4 Subject: [PATCH 6/6] Support of overlapping src/dst for pixman_blt_neon
   5
   6 ---
   7  pixman/pixman-arm-neon.c |   63 ++++++++++++++++++++++++++++++++++++++-------
   8  1 files changed, 53 insertions(+), 10 deletions(-)
   9
  10 diff --git a/pixman/pixman-arm-neon.c b/pixman/pixman-arm-neon.c
  11 index 495fda4..c632ff5 100644
  12 --- a/pixman/pixman-arm-neon.c
  13 +++ b/pixman/pixman-arm-neon.c
  14 @@ -357,26 +357,66 @@
  15                   int       width,
  16                   int       height)
  17  {
  18 -    if (src_bpp != dst_bpp)
  19 +    uint8_t *   src_bytes;
  20 +    uint8_t *   dst_bytes;
  21 +    int         bpp;
  22 +
  23 +    if (src_bpp != dst_bpp || src_bpp & 7)
  24         return FALSE;
  25
  26 +    bpp = src_bpp >> 3;
  27 +    width *= bpp;
  28 +    src_stride *= 4;
  29 +    dst_stride *= 4;
  30 +    src_bytes = (uint8_t *)src_bits + src_y * src_stride + src_x * bpp;
  31 +    dst_bytes = (uint8_t *)dst_bits + dst_y * dst_stride + dst_x * bpp;
  32 +
  33 +    if (src_bpp != 16 && src_bpp != 32)
  34 +    {
  35 +       pixman_blt_helper (src_bytes, dst_bytes, src_stride, dst_stride,
  36 +                          width, height);
  37 +       return TRUE;
  38 +    }
  39 +
  40 +    if (src_bytes < dst_bytes && src_bytes + src_stride * height > dst_bytes)
  41 +    {
  42 +       src_bytes += src_stride * height - src_stride;
  43 +       dst_bytes += dst_stride * height - dst_stride;
  44 +       dst_stride = -dst_stride;
  45 +       src_stride = -src_stride;
  46 +
  47 +       if (src_bytes + width > dst_bytes)
  48 +       {
  49 +           /* TODO: reverse scanline copy using NEON */
  50 +           while (--height >= 0)
  51 +           {
  52 +               memmove (dst_bytes, src_bytes, width);
  53 +               dst_bytes += dst_stride;
  54 +               src_bytes += src_stride;
  55 +           }
  56 +           return TRUE;
  57 +       }
  58 +    }
  59 +
  60      switch (src_bpp)
  61      {
  62      case 16:
  63         pixman_composite_src_0565_0565_asm_neon (
  64 -               width, height,
  65 -               (uint16_t *)(((char *) dst_bits) +
  66 -               dst_y * dst_stride * 4 + dst_x * 2), dst_stride * 2,
  67 -               (uint16_t *)(((char *) src_bits) +
  68 -               src_y * src_stride * 4 + src_x * 2), src_stride * 2);
  69 +               width >> 1,
  70 +               height,
  71 +               (uint16_t *) dst_bytes,
  72 +               dst_stride >> 1,
  73 +               (uint16_t *) src_bytes,
  74 +               src_stride >> 1);
  75         return TRUE;
  76      case 32:
  77         pixman_composite_src_8888_8888_asm_neon (
  78 -               width, height,
  79 -               (uint32_t *)(((char *) dst_bits) +
  80 -               dst_y * dst_stride * 4 + dst_x * 4), dst_stride,
  81 -               (uint32_t *)(((char *) src_bits) +
  82 -               src_y * src_stride * 4 + src_x * 4), src_stride);
  83 +               width >> 2,
  84 +               height,
  85 +               (uint32_t *) dst_bytes,
  86 +               dst_stride >> 2,
  87 +               (uint32_t *) src_bytes,
  88 +               src_stride >> 2);
  89         return TRUE;
  90      default:
  91         return FALSE;
  92 --
  93 1.6.2.4
  94