From 080d1527a5358dd66ac927acbe0ec61cba7aa7e1 Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 11 Jun 2012 08:22:24 +0200 Subject: fontconfig glproto mesa pixman git update 11 Jun 2012 --- pixman/test/utils.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) (limited to 'pixman/test/utils.c') diff --git a/pixman/test/utils.c b/pixman/test/utils.c index c1bf6dc2c..0abc32c66 100644 --- a/pixman/test/utils.c +++ b/pixman/test/utils.c @@ -135,6 +135,107 @@ compute_crc32 (uint32_t in_crc32, return (crc32 ^ 0xFFFFFFFF); } +static uint32_t +compute_crc32_for_image_internal (uint32_t crc32, + pixman_image_t *img, + pixman_bool_t remove_alpha, + pixman_bool_t remove_rgb) +{ + pixman_format_code_t fmt = pixman_image_get_format (img); + uint32_t *data = pixman_image_get_data (img); + int stride = pixman_image_get_stride (img); + int height = pixman_image_get_height (img); + uint32_t mask = 0xffffffff; + int i; + + /* mask unused 'x' part */ + if (PIXMAN_FORMAT_BPP (fmt) - PIXMAN_FORMAT_DEPTH (fmt) && + PIXMAN_FORMAT_DEPTH (fmt) != 0) + { + uint32_t m = (1 << PIXMAN_FORMAT_DEPTH (fmt)) - 1; + + if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA || + PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA) + { + m <<= (PIXMAN_FORMAT_BPP (fmt) - PIXMAN_FORMAT_DEPTH (fmt)); + } + + mask &= m; + } + + /* mask alpha channel */ + if (remove_alpha && PIXMAN_FORMAT_A (fmt)) + { + uint32_t m; + + if (PIXMAN_FORMAT_BPP (fmt) == 32) + m = 0xffffffff; + else + m = (1 << PIXMAN_FORMAT_BPP (fmt)) - 1; + + m >>= PIXMAN_FORMAT_A (fmt); + + if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA || + PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA || + PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_A) + { + /* Alpha is at the bottom of the pixel */ + m <<= PIXMAN_FORMAT_A (fmt); + } + + mask &= m; + } + + /* mask rgb channels */ + if (remove_rgb && PIXMAN_FORMAT_RGB (fmt)) + { + uint32_t m = ((uint32_t)~0) >> (32 - PIXMAN_FORMAT_BPP (fmt)); + uint32_t size = PIXMAN_FORMAT_R (fmt) + PIXMAN_FORMAT_G (fmt) + PIXMAN_FORMAT_B (fmt); + + m &= ~((1 << size) - 1); + + if (PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_BGRA || + PIXMAN_FORMAT_TYPE (fmt) == PIXMAN_TYPE_RGBA) + { + /* RGB channels are at the top of the pixel */ + m >>= size; + } + + mask &= m; + } + + for (i = 0; i * PIXMAN_FORMAT_BPP (fmt) < 32; i++) + mask |= mask << (i * PIXMAN_FORMAT_BPP (fmt)); + + for (i = 0; i < stride * height / 4; i++) + data[i] &= mask; + + /* swap endiannes in order to provide identical results on both big + * and litte endian systems + */ + image_endian_swap (img); + + return compute_crc32 (crc32, data, stride * height); +} + +uint32_t +compute_crc32_for_image (uint32_t crc32, + pixman_image_t *img) +{ + if (img->common.alpha_map) + { + crc32 = compute_crc32_for_image_internal (crc32, img, TRUE, FALSE); + crc32 = compute_crc32_for_image_internal ( + crc32, (pixman_image_t *)img->common.alpha_map, FALSE, TRUE); + } + else + { + crc32 = compute_crc32_for_image_internal (crc32, img, FALSE, FALSE); + } + + return crc32; +} + pixman_bool_t is_little_endian (void) { -- cgit v1.2.3