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evas map: fix wrong range in anti-aliasing processing. 

alpha value must be in 0 - 255.
This commit is contained in:
Hermet Park 2019-03-04 20:35:31 +09:00
parent edbce35967
commit 057db36423
1 changed files with 6 additions and 6 deletions
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12
src/lib/evas/common/evas_map_image_aa.c
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@ -12,14 +12,14 @@ calc_irregular_coverage(Line* spans, int eidx, int y, int diagonal,
int edge_dist, Eina_Bool reverse)
{
if (eidx == 1) reverse = !reverse;
int coverage = (256 / (diagonal + 2));
int coverage = (255 / (diagonal + 2));
int tmp;
for (int ry = 0; ry < (diagonal + 2); ry++)
{
tmp = y - ry - edge_dist;
if (tmp < 0) return;
spans[tmp].aa_len[eidx] = 1;
if (reverse) spans[tmp].aa_cov[eidx] = 256 - (coverage * ry);
if (reverse) spans[tmp].aa_cov[eidx] = 255 - (coverage * ry);
else spans[tmp].aa_cov[eidx] = (coverage * ry);
}
}
@ -28,14 +28,14 @@ static void
calc_vert_coverage(Line *spans, int eidx, int y, int rewind, Eina_Bool reverse)
{
if (eidx == 1) reverse = !reverse;
int coverage = (256 / (rewind + 1));
int coverage = (255 / (rewind + 1));
int tmp;
for (int ry = 1; ry < (rewind + 1); ry++)
{
tmp = y - ry;
if (tmp < 0 ) return;
spans[tmp].aa_len[eidx] = 1;
if (reverse) spans[tmp].aa_cov[eidx] = (256 - (coverage * ry));
if (reverse) spans[tmp].aa_cov[eidx] = (255 - (coverage * ry));
else spans[tmp].aa_cov[eidx] = (coverage * ry);
}
}
@ -46,7 +46,7 @@ calc_horiz_coverage(Line *spans, int eidx, int y, int x, int x2)
if (spans[y].aa_len[eidx] < abs(x - x2))
{
spans[y].aa_len[eidx] = abs(x - x2);
spans[y].aa_cov[eidx] = (256 / (spans[y].aa_len[eidx] + 1));
spans[y].aa_cov[eidx] = (255 / (spans[y].aa_len[eidx] + 1));
}
}
@ -61,7 +61,7 @@ _aa_coverage_apply(Line *line, int ww, int w, DATA32 val, Eina_Bool src_alpha)
//Right Edge Anti Aliasing
if (line->aa_len[1] >= ww)
{
return MUL_256(256 - (line->aa_cov[1] * (line->aa_len[1] - ww + 1)),
return MUL_256(255 - (line->aa_cov[1] * (line->aa_len[1] - ww + 1)),
val);
}
//Remove Transparency if src image alpha is off.