diff options
| -rw-r--r-- | src/blitter/base.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/blitter/base.cpp b/src/blitter/base.cpp index cbaea29f9..bb8b9f234 100644 --- a/src/blitter/base.cpp +++ b/src/blitter/base.cpp @@ -36,6 +36,12 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid 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); if (width > 1) { /* compute frac_diff = width * sqrt(dx*dx + dy*dy) |