mirror
/
OpenTTD
mirror of https://github.com/OpenTTD/OpenTTD
1
0
Fork 0
Code Issues

(svn r22439) -Fix (r22291, r22426): Drawing lines of length zero failed.

release/1.2
frosch 2011-05-08 18:20:21 +00:00
parent c4a15a6a9e
commit b7c6424104
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/blitter/base.cpp
View File

@ -36,6 +36,12 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid
stepx = 1; stepx = 1;
} }
if (dx == 0 && dy == 0) {
/* The algorithm below cannot handle this special case; make it work at least for line width 1 */
if (x >= 0 && x < screen_width && y >= 0 && y < screen_height) this->SetPixel(video, x, y, colour);
return;
}
int frac_diff = width * max(dx, dy); int frac_diff = width * max(dx, dy);
if (width > 1) { if (width > 1) {
/* compute frac_diff = width * sqrt(dx*dx + dy*dy) /* compute frac_diff = width * sqrt(dx*dx + dy*dy)