jpeg pushed a commit to branch master.
http://git.enlightenment.org/core/efl.git/commit/?id=52d117c90501c5cec32248b4231f8f44735bdcf9
commit 52d117c90501c5cec32248b4231f8f44735bdcf9
Author: Jean-Philippe Andre <jp.an...@samsung.com>
Date: Mon Dec 8 13:50:44 2014 +0900
Evas font: Compress font algo should round instead of floor
This is an attempt at having higher quality font rendering
while still using RLE-based font compression.
---
src/lib/evas/common/evas_font_compress.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/lib/evas/common/evas_font_compress.c
b/src/lib/evas/common/evas_font_compress.c
index 1b8d631..66c8511 100644
--- a/src/lib/evas/common/evas_font_compress.c
+++ b/src/lib/evas/common/evas_font_compress.c
@@ -151,6 +151,9 @@ compress_rle4(DATA8 *src, int pitch, int w, int h, int
*size_ret)
{
// we only need upper 4 bits of value for span creation
DATA8 v = pix[x] >> 4;
+ // round-up if closer to upper value
+ if ((pix[x] & 0x8) && (v != 0xF))
+ v++;
// if the current pixel value (in 4bit) is not the same as the
// span value (n 4 bit) OR... if the span now exceeds 16 pixels
// then add/write out the span to our RLE span blob
@@ -344,7 +347,11 @@ compress_bpp4(DATA8 *src, int pitch, int w, int h, int
*size_ret)
// 4 bits only needed) and pack
for (x = 0; x < (w - 1); x += 2)
{
- *d = (s[0] & 0xf0) | (s[1] >> 4);
+ DATA8 v1 = s[0] >> 4;
+ DATA8 v2 = s[1] >> 4;
+ if ((s[0] & 0x08) && (v1 != 0x0f)) v1++;
+ if ((s[1] & 0x08) && (v2 != 0x0f)) v2++;
+ *d = (v1 << 4) | v2;
s += 2;
d++;
}
--
