From: Siarhei Siamashka <[email protected]>
Looks like PDF blend modes have some problems with fixed point arithmetics.
But probably 'composite' test program is a more appropriate place for
verifying this.
---
test/blitters-test.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/test/blitters-test.c b/test/blitters-test.c
index 21685b1..c58de09 100644
--- a/test/blitters-test.c
+++ b/test/blitters-test.c
@@ -248,6 +248,7 @@ test_composite (int testnum, int verbose)
int mask_x, mask_y;
int w, h;
int op;
+ int src_repeat_flag = 0;
pixman_format_code_t src_fmt, dst_fmt, mask_fmt;
uint32_t *dstbuf, *srcbuf, *maskbuf;
uint32_t crc32;
@@ -283,6 +284,7 @@ test_composite (int testnum, int verbose)
max_extra_stride, &src_fmt);
pixman_image_set_repeat (src_img, PIXMAN_REPEAT_NORMAL);
+ src_repeat_flag = 1;
}
dst_img = create_random_image (img_fmt_list, max_width, max_height,
@@ -363,6 +365,57 @@ test_composite (int testnum, int verbose)
printf ("w=%d, h=%d\n", w, h);
}
+ /*
+ * Extra test for correctness.
+ */
+ if (src_fmt != PIXMAN_a8r8g8b8)
+ {
+ int j;
+ pixman_image_t *test_src_img = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, src_width, src_height, NULL, src_width * 4);
+ pixman_image_t *test_dst1_img = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, dst_width, dst_height, NULL, dst_width * 4);
+ pixman_image_t *test_dst2_img = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, dst_width, dst_height, NULL, dst_width * 4);
+
+ uint8_t *bits_dst1 = (uint8_t *) test_dst1_img->bits.bits;
+ uint8_t *bits_dst2 = (uint8_t *) test_dst2_img->bits.bits;
+
+ pixman_image_composite (PIXMAN_OP_SRC, src_img, NULL, test_src_img,
+ 0, 0, 0, 0, 0, 0, src_width, src_height);
+ if (src_repeat_flag)
+ pixman_image_set_repeat (test_src_img, PIXMAN_REPEAT_NORMAL);
+ pixman_image_composite (PIXMAN_OP_SRC, dst_img, NULL, test_dst1_img,
+ 0, 0, 0, 0, 0, 0, dst_width, dst_height);
+ pixman_image_composite (PIXMAN_OP_SRC, dst_img, NULL, test_dst2_img,
+ 0, 0, 0, 0, 0, 0, dst_width, dst_height);
+
+ pixman_image_composite (op, test_src_img, mask_img, test_dst1_img,
src_x, src_y,
+ mask_x, mask_y, dst_x, dst_y, w, h);
+ pixman_image_composite (op, src_img, mask_img, test_dst2_img, src_x,
src_y,
+ mask_x, mask_y, dst_x, dst_y, w, h);
+
+ for (i = 0; i < dst_height; i++)
+ {
+ for (j = 0; j < dst_width * 4; j++)
+ {
+ int pix1 = *(bits_dst1 + i * dst_width * 4 + j);
+ int pix2 = *(bits_dst2 + i * dst_width * 4 + j);
+ if (abs (pix1 - pix2) > 8)
+ {
+ printf ("test=%d, op=0x%X, %d != %d, i=%d, j=%d\n",
+ testnum, op, pix1, pix2, i, j);
+ if (!verbose)
+ abort ();
+ }
+ }
+ }
+
+ pixman_image_unref (test_src_img);
+ pixman_image_unref (test_dst1_img);
+ pixman_image_unref (test_dst2_img);
+ }
+
pixman_image_composite (op, src_img, mask_img, dst_img,
src_x, src_y, mask_x, mask_y, dst_x, dst_y, w, h);
--
1.7.2.2
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