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Avoid division-by-zero in wxImage::Paste()

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See #23791
This commit is contained in:
Paul Cornett 2023-08-23 23:03:43 -07:00
parent f6255e456b
commit 496a9a40a1
1 changed files with 8 additions and 0 deletions
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8
src/common/image.cpp
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@ -1741,6 +1741,14 @@ wxImage::Paste(const wxImage & image, int x, int y,
float light_left = (alpha_target_data[i] / 255.0f) * (1.0f - source_alpha);
float result_alpha = source_alpha + light_left;
alpha_target_data[i] = (unsigned char)((result_alpha * 255) + 0.5f);
if (result_alpha <= 0)
{
int c = 3 * i;
target_data[c++] = 0;
target_data[c++] = 0;
target_data[c] = 0;
continue;
}
for (int c = 3 * i; c < 3 * (i + 1); c++)
{
target_data[c] =