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never use tiff memcpy mode for ycbcr images 

We were still using memcpy mode for some strip YCbCr images. Clean up
read var naming to make the logic easier to follow.
This commit is contained in:
John Cupitt 2019-04-01 17:10:10 +01:00
parent 1f100c0c42
commit 66f1b4408c
1 changed files with 59 additions and 36 deletions
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95
libvips/foreign/tiff2vips.c
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@ -254,21 +254,29 @@ typedef struct _RtiffHeader {
*/
gboolean tiled;
/* Fields for tiled images.
/* Fields for tiled images, as returned by libtiff.
*/
uint32 tile_width;
uint32 tile_height;
tsize_t tile_size;
/* Fields for strip images.
*
* If read_scanlinewise is TRUE, the strips are too large to read in a
* single lump and we need to use the scanline API.
/* Fields for strip images, as returned by libtiff.
*/
uint32 rows_per_strip;
tsize_t strip_size;
tsize_t tile_size;
int number_of_strips;
/* If read_scanlinewise is TRUE, the strips are too large to read in a
* single lump and we will use the scanline API.
*/
gboolean read_scanlinewise;
/* Strip read geometry. These are the read params as they will be used
* to read, with either TIFFReadScanline() or TIFFReadEncodedStrip(),
* not as they are stored in the file.
*/
uint32 read_rows_per_strip;
tsize_t read_strip_size;
} RtiffHeader;
/* Scanline-type process function.
@ -1259,7 +1267,12 @@ rtiff_parse_copy( Rtiff *rtiff, VipsImage *out )
rtiff->sfn = rtiff_memcpy_line;
rtiff->client = out;
rtiff->memcpy = TRUE;
/* We expand YCBCR images to RGB using JPEGCOLORMODE_RGB, and this
* means we need a slightly larger read buffer for the edge pixels. In
* turn, this means we can't just memcpy to libvips regions.
*/
rtiff->memcpy = photometric_interpretation != PHOTOMETRIC_YCBCR;
return( 0 );
}
@ -1705,9 +1718,7 @@ rtiff_read_tilewise( Rtiff *rtiff, VipsImage *out )
* match the tifftile size.
*/
if( rtiff->memcpy ) {
size_t vips_tile_size;
vips_tile_size = VIPS_IMAGE_SIZEOF_PEL( t[0] ) *
size_t vips_tile_size = VIPS_IMAGE_SIZEOF_PEL( t[0] ) *
tile_width * tile_height;
if( rtiff->header.tile_size != vips_tile_size ) {
@ -1753,15 +1764,15 @@ static int
rtiff_strip_read_interleaved( Rtiff *rtiff, tstrip_t strip, tdata_t buf )
{
int samples_per_pixel = rtiff->header.samples_per_pixel;
int rows_per_strip = rtiff->header.rows_per_strip;
int read_rows_per_strip = rtiff->header.read_rows_per_strip;
int bits_per_sample = rtiff->header.bits_per_sample;
int strip_y = strip * rows_per_strip;
int strip_y = strip * read_rows_per_strip;
if( rtiff->header.separate ) {
int page_width = rtiff->header.width;
int page_height = rtiff->header.height;
int strips_per_plane = 1 + (page_height - 1) / rows_per_strip;
int strip_height = VIPS_MIN( rows_per_strip,
int strips_per_plane = 1 + (page_height - 1) / read_rows_per_strip;
int strip_height = VIPS_MIN( read_rows_per_strip,
page_height - strip_y );
int pels_per_strip = page_width * strip_height;
int bytes_per_sample = bits_per_sample >> 3;
@ -1801,7 +1812,7 @@ rtiff_stripwise_generate( VipsRegion *or,
void *seq, void *a, void *b, gboolean *stop )
{
Rtiff *rtiff = (Rtiff *) a;
int rows_per_strip = rtiff->header.rows_per_strip;
int read_rows_per_strip = rtiff->header.read_rows_per_strip;
int page_height = rtiff->header.height;
tsize_t scanline_size = TIFFScanlineSize( rtiff->tiff );
VipsRect *r = &or->valid;
@ -1828,7 +1839,7 @@ rtiff_stripwise_generate( VipsRegion *or,
* strip in the image.
*/
g_assert( r->height ==
VIPS_MIN( rows_per_strip, or->im->Ysize - r->top ) );
VIPS_MIN( read_rows_per_strip, or->im->Ysize - r->top ) );
VIPS_GATE_START( "rtiff_stripwise_generate: work" );
@ -1843,7 +1854,7 @@ rtiff_stripwise_generate( VipsRegion *or,
/* Strip number.
*/
tstrip_t strip_no = y_page / rows_per_strip;
tstrip_t strip_no = y_page / read_rows_per_strip;
VipsRect image, page, strip, hit;
@ -1861,9 +1872,9 @@ rtiff_stripwise_generate( VipsRegion *or,
page.height = page_height;
strip.left = 0;
strip.top = page.top + strip_no * rows_per_strip;
strip.top = page.top + strip_no * read_rows_per_strip;
strip.width = rtiff->out->Xsize;
strip.height = rows_per_strip;
strip.height = read_rows_per_strip;
/* Clip strip against page and image ... the final strip will
* be smaller.
@ -1968,6 +1979,10 @@ rtiff_read_stripwise( Rtiff *rtiff, VipsImage *out )
rtiff->header.strip_size );
printf( "rtiff_read_stripwise: header.number_of_strips = %d\n",
rtiff->header.number_of_strips );
printf( "rtiff_read_stripwise: header.read_rows_per_strip = %u\n",
rtiff->header.read_rows_per_strip );
printf( "rtiff_read_stripwise: header.read_strip_size = %zd\n",
rtiff->header.read_strip_size );
#endif /*DEBUG*/
/* Double check: in memcpy mode, the vips linesize should exactly
@ -1999,7 +2014,7 @@ rtiff_read_stripwise( Rtiff *rtiff, VipsImage *out )
*/
if( rtiff->header.separate ) {
if( !(rtiff->plane_buf = vips_malloc( VIPS_OBJECT( out ),
rtiff->header.strip_size )) )
rtiff->header.read_strip_size )) )
return( -1 );
}
@ -2016,7 +2031,7 @@ rtiff_read_stripwise( Rtiff *rtiff, VipsImage *out )
rtiff->n > 1 ) {
tsize_t size;
size = rtiff->header.strip_size;
size = rtiff->header.read_strip_size;
if( rtiff->header.separate )
size *= rtiff->header.samples_per_pixel;
@ -2030,7 +2045,7 @@ rtiff_read_stripwise( Rtiff *rtiff, VipsImage *out )
NULL, rtiff_stripwise_generate, NULL,
rtiff, NULL ) ||
vips_sequential( t[0], &t[1],
"tile_height", rtiff->header.rows_per_strip,
"tile_height", rtiff->header.read_rows_per_strip,
NULL ) ||
rtiff_autorotate( rtiff, t[1], &t[2] ) ||
vips_image_write( t[2], out ) )
@ -2123,6 +2138,8 @@ rtiff_header_read( Rtiff *rtiff, RtiffHeader *header )
header->rows_per_strip = 0;
header->strip_size = 0;
header->number_of_strips = 0;
header->read_rows_per_strip = 0;
header->read_strip_size = 0;
}
else {
if( !tfget32( rtiff->tiff,
@ -2130,15 +2147,6 @@ rtiff_header_read( Rtiff *rtiff, RtiffHeader *header )
return( -1 );
header->strip_size = TIFFStripSize( rtiff->tiff );
header->number_of_strips = TIFFNumberOfStrips( rtiff->tiff );
header->read_scanlinewise = FALSE;
/* rows_per_strip can be 2 ** 32 - 1, meaning the whole image.
* Clip this down to height to avoid confusing vips.
*
* And it musn't be zero.
*/
header->rows_per_strip =
VIPS_CLIP( 1, header->rows_per_strip, header->height );
/* libtiff has two strip-wise readers. TIFFReadEncodedStrip()
* decompresses an entire strip to memory. It's fast, but it
@ -2154,10 +2162,25 @@ rtiff_header_read( Rtiff *rtiff, RtiffHeader *header )
*/
if( header->rows_per_strip > 128 &&
!header->separate ) {
header->rows_per_strip = 1;
header->strip_size = TIFFScanlineSize( rtiff->tiff );
header->number_of_strips = header->height;
header->read_scanlinewise = TRUE;
header->read_rows_per_strip = 1;
header->read_strip_size =
TIFFScanlineSize( rtiff->tiff );
}
else {
header->read_scanlinewise = FALSE;
/* rows_per_strip can be 2 ** 32 - 1, meaning the
* whole image. Clip this down to height to avoid
* confusing vips.
*
* And it musn't be zero.
*/
header->read_rows_per_strip =
VIPS_CLIP( 1,
header->rows_per_strip,
header->height );
header->read_strip_size = header->strip_size;
}
/* Stop some compiler warnings.
@ -2191,8 +2214,8 @@ rtiff_header_equal( RtiffHeader *h1, RtiffHeader *h2 )
return( 0 );
}
else {
if( h1->rows_per_strip != h2->rows_per_strip ||
h1->strip_size != h2->strip_size ||
if( h1->read_rows_per_strip != h2->read_rows_per_strip ||
h1->read_strip_size != h2->read_strip_size ||
h1->number_of_strips != h2->number_of_strips )
return( 0 );
}