imageio_tiff.h File Reference

#include "common/image.h"
#include "caches/mipmap_cache.h"

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Functions
dt_imageio_retval_t	dt_imageio_open_tiff (dt_image_t *img, const char *filename, dt_mipmap_buffer_t *buf)
int	dt_imageio_tiff_read_profile (const char *filename, uint8_t **out)
gboolean	dt_imageio_tiff_decode_blob (const uint8_t *blob, size_t bufsize, uint8_t **out, int32_t *width, int32_t *height)
	Decode a TIFF held in memory into 8-bit RGBx, for the previews raw files embed.

Function Documentation

dt_imageio_open_tiff()

dt_imageio_retval_t dt_imageio_open_tiff	(	dt_image_t *	img,
		const char *	filename,
		dt_mipmap_buffer_t *	buf
	)

Definition at line 354 of file imageio_tiff.c.

References _error_handler(), _read_chunky_16(), _read_chunky_16_Lab(), _read_chunky_8(), _read_chunky_8_Lab(), _read_chunky_f(), _read_chunky_h(), _warning_handler(), DT_DEBUG_IMAGEIO, dt_exif_read(), dt_free, DT_IMAGE_HDR, DT_IMAGE_LDR, DT_IMAGEIO_CACHE_FULL, DT_IMAGEIO_FILE_CORRUPTED, DT_IMAGEIO_OK, dt_mipmap_cache_alloc(), dt_print(), dt_image_t::exif_inited, tiff_t::image, IOP_CS_LAB, IOP_CS_RGB, IS_NULL_PTR, LOADER_TIFF, t, TYPE_FLOAT, and void().

Referenced by dt_imageio_open_raster().

dt_imageio_tiff_decode_blob()

gboolean dt_imageio_tiff_decode_blob	(	const uint8_t *	blob,
		size_t	bufsize,
		uint8_t **	out,
		int32_t *	width,
		int32_t *	height
	)

Decode a TIFF held in memory into 8-bit RGBx, for the previews raw files embed.

Raws that do not embed a JPEG preview embed a TIFF one – every DNG written by Adobe's converter does, as do Phase One IIQ, Hasselblad 3FR and film scanners. This is the only decoder those previews need; libtiff reads a blob through TIFFClientOpen just as well as a file.

Parameters

blob	Encoded TIFF bytes. Not retained.
bufsize	Length of blob.
out	On success, receives a freshly allocated buffer of 4 bytes per pixel, laid out R, G, B, unused – the layout the JPEG preview path also produces. The caller owns it and must release it with dt_pixelpipe_cache_free_align(). Untouched on failure.
width	Receives the decoded width. Untouched on failure.
height	Receives the decoded height. Untouched on failure.

Returns

TRUE on success, FALSE if the blob is not a readable TIFF or allocation failed.

Definition at line 651 of file imageio_tiff.c.

References _blob_close(), _blob_map(), _blob_read(), _blob_seek(), _blob_size(), _blob_unmap(), _blob_write(), _error_handler(), _warning_handler(), _tiff_blob_t::data, DT_DEBUG_IMAGEIO, dt_pixelpipe_cache_alloc_align_cache, dt_pixelpipe_cache_free_align, dt_print(), FALSE, height, i, IS_NULL_PTR, out, TRUE, and width.

Referenced by dt_imageio_large_thumbnail().

dt_imageio_tiff_read_profile()

int dt_imageio_tiff_read_profile	(	const char *	filename,
		uint8_t **	out
	)

Definition at line 517 of file imageio_tiff.c.

References dt_colorspaces_get_profile(), dt_free, DT_PROFILE_ROLE_MONITOR, DT_PROFILE_ROLE_OUTPUT, IS_NULL_PTR, LAB_CONVERSION_PROFILE, out, and dt_colorspaces_color_profile_t::profile.

Referenced by dt_image_find_best_color_profile().