ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

gdi32: Avoid rounding errors with visible rectangles in mirroring blits.

This commit is contained in:
Alexandre Julliard 2011-09-23 14:17:05 +02:00
parent 527a985a3d
commit 7029559ed6
1 changed files with 14 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
dlls/gdi32/bitblt.c
View File

@ -120,10 +120,13 @@ static BOOL get_vis_rectangles( DC *dc_dst, struct bitblt_coords *dst,
else /* stretching */
{
/* map source rectangle into destination coordinates */
rect.left = dst->x + (src->visrect.left - src->x)*dst->width/src->width;
rect.top = dst->y + (src->visrect.top - src->y)*dst->height/src->height;
rect.right = dst->x + (src->visrect.right - src->x)*dst->width/src->width;
rect.bottom = dst->y + (src->visrect.bottom - src->y)*dst->height/src->height;
rect = src->visrect;
offset_rect( &rect, -min( src->x, src->x + src->width + 1),
-min( src->y, src->y + src->height + 1) );
rect.left = dst->x + rect.left * dst->width / abs(src->width);
rect.top = dst->y + rect.top * dst->height / abs(src->height);
rect.right = dst->x + rect.right * dst->width / abs(src->width);
rect.bottom = dst->y + rect.bottom * dst->height / abs(src->height);
if (rect.left > rect.right) swap_ints( &rect.left, &rect.right );
if (rect.top > rect.bottom) swap_ints( &rect.top, &rect.bottom );
@ -135,10 +138,13 @@ static BOOL get_vis_rectangles( DC *dc_dst, struct bitblt_coords *dst,
if (!intersect_rect( &dst->visrect, &rect, &dst->visrect )) return FALSE;
/* map destination rectangle back to source coordinates */
rect.left = src->x + (dst->visrect.left - dst->x)*src->width/dst->width;
rect.top = src->y + (dst->visrect.top - dst->y)*src->height/dst->height;
rect.right = src->x + (dst->visrect.right - dst->x)*src->width/dst->width;
rect.bottom = src->y + (dst->visrect.bottom - dst->y)*src->height/dst->height;
rect = dst->visrect;
offset_rect( &rect, -min( dst->x, dst->x + dst->width + 1),
-min( dst->y, dst->y + dst->height + 1) );
rect.left = src->x + rect.left * src->width / abs(dst->width);
rect.top = src->y + rect.top * src->height / abs(dst->height);
rect.right = src->x + rect.right * src->width / abs(dst->width);
rect.bottom = src->y + rect.bottom * src->height / abs(dst->height);
if (rect.left > rect.right) swap_ints( &rect.left, &rect.right );
if (rect.top > rect.bottom) swap_ints( &rect.top, &rect.bottom );