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stb_truetype: fix a division by zero (unused chain of result, but triggering debuggers). (#5139, #5075) 

Amend 0cff5ac (mislabeled as stb_textedit)
master
ocornut 2022-03-29 14:23:30 +02:00
parent 2747a8ca40
commit 88fbc31ee0
1 changed files with 4 additions and 1 deletions
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5
imstb_truetype.h
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@ -3200,8 +3200,11 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
// check if final y_crossing is blown up; no test case for this
if (y_final > y_bottom) {
int denom = (x2 - (x1+1));
y_final = y_bottom;
dy = (y_final - y_crossing ) / (x2 - (x1+1)); // if denom=0, y_final = y_crossing, so y_final <= y_bottom
if (denom != 0) { // [DEAR IMGUI] Avoid div by zero (https://github.com/nothings/stb/issues/1316)
dy = (y_final - y_crossing ) / denom; // if denom=0, y_final = y_crossing, so y_final <= y_bottom
}
}
// in second pixel, area covered by line segment found in first pixel