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(svn r22439) -Fix (r22291, r22426): Drawing lines of length zero failed.
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@ -36,6 +36,12 @@ void Blitter::DrawLine(void *video, int x, int y, int x2, int y2, int screen_wid
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stepx = 1;
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}
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if (dx == 0 && dy == 0) {
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/* The algorithm below cannot handle this special case; make it work at least for line width 1 */
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if (x >= 0 && x < screen_width && y >= 0 && y < screen_height) this->SetPixel(video, x, y, colour);
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return;
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}
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int frac_diff = width * max(dx, dy);
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if (width > 1) {
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/* compute frac_diff = width * sqrt(dx*dx + dy*dy)
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