alpha channel if alpha mask or 32-bit uncompressed

ImageMagick · May 19, 2024 · 11587ef · 11587ef
1 parent aafb1db
commit 11587ef
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/coders/bmp.c b/coders/bmp.c
@@ -1030,7 +1030,8 @@ static Image *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
     image->rows=(size_t) MagickAbsoluteValue(bmp_info.height);
     image->depth=bmp_info.bits_per_pixel <= 8 ? bmp_info.bits_per_pixel : 8;
     image->matte=((bmp_info.alpha_mask != 0) &&
-      (bmp_info.compression == BI_BITFIELDS)) ? MagickTrue : MagickFalse;
+      ((bmp_info.compression == BI_RGB) && (bmp_info.bits_per_pixel == 32))) ?
+      MagickTrue : MagickFalse;
     if (bmp_info.bits_per_pixel < 16)
       {
         size_t