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fix anim webp load for some sizes

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rounding on resize for each frame needs to match resize for whole image
This commit is contained in:
John Cupitt 2019-05-01 16:34:58 +01:00
parent b1c995b2d9
commit bcdaeca578
1 changed files with 7 additions and 5 deletions
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12
libvips/foreign/webp2vips.c
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@ -637,12 +637,14 @@ read_next_frame( Read *read )
printf( "read_next_frame:\n" ); printf( "read_next_frame:\n" );
#endif /*DEBUG*/ #endif /*DEBUG*/
/* Area of this frame, in output image coordinates. /* Area of this frame, in output image coordinates. We must rint(),
* since we need the same rules as the overall image scale, or we'll
* sometimes have missing pixels on edges.
*/ */
area.left = read->iter.x_offset * read->scale; area.left = VIPS_RINT( read->iter.x_offset * read->scale );
area.top = read->iter.y_offset * read->scale; area.top = VIPS_RINT( read->iter.y_offset * read->scale );
area.width = read->iter.width * read->scale; area.width = VIPS_RINT( read->iter.width * read->scale );
area.height = read->iter.height * read->scale; area.height = VIPS_RINT( read->iter.height * read->scale );
/* Dispose from the previous frame. /* Dispose from the previous frame.
*/ */