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reads animation headers

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decode animation frames next
This commit is contained in:
John Cupitt 2018-11-02 10:22:03 +00:00
parent 5dadc03ce0
commit 3194083af2
1 changed files with 23 additions and 9 deletions
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32
libvips/foreign/webp2vips.c
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@ -219,6 +219,7 @@ read_header( Read *read, VipsImage *out )
int canvas_height;
int flags;
int frame_count;
WebPIterator iter;
int i;
data.bytes = read->data;
@ -252,9 +253,22 @@ read_header( Read *read, VipsImage *out )
loop_count = WebPDemuxGetI( read->demux, WEBP_FF_LOOP_COUNT );
frame_count = WebPDemuxGetI( read->demux, WEBP_FF_FRAME_COUNT );
printf( "webp2vips: animation\n" );
printf( "webp2vips: loop_count = %d\n", loop_count );
printf( "webp2vips: frame_count = %d\n", frame_count );
vips_image_set_int( out, "gif-loop", loop_count );
vips_image_set_int( out, "page-height", read->height );
read->height *= frame_count;
/* We must get the first frame to get the delay.
*/
if( WebPDemuxGetFrame( read->demux, 1, &iter ) ) {
printf( "webp2vips: duration = %d\n", iter.duration );
vips_image_set_int( out, "gif-delay", iter.duration );
WebPDemuxReleaseIterator( &iter );
}
}
if( read->width <= 0 ||
@ -263,15 +277,6 @@ read_header( Read *read, VipsImage *out )
return( -1 );
}
vips_image_init_fields( out,
read->width, read->height,
(flags & ALPHA_FLAG) ? 4 : 3,
VIPS_FORMAT_UCHAR, VIPS_CODING_NONE,
VIPS_INTERPRETATION_sRGB,
1.0, 1.0 );
vips_image_pipelinev( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
for( i = 0; i < vips__n_webp_names; i++ ) {
const char *vips = vips__webp_names[i].vips;
const char *webp = vips__webp_names[i].webp;
@ -295,6 +300,15 @@ read_header( Read *read, VipsImage *out )
}
}
vips_image_init_fields( out,
read->width, read->height,
(flags & ALPHA_FLAG) ? 4 : 3,
VIPS_FORMAT_UCHAR, VIPS_CODING_NONE,
VIPS_INTERPRETATION_sRGB,
1.0, 1.0 );
vips_image_pipelinev( out, VIPS_DEMAND_STYLE_THINSTRIP, NULL );
return( 0 );
}