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gtk/gdk/loaders/gdktiff.c
Benjamin Otte b2f9a907ce tiff: Fix variable assignment
2021-10-22 23:50:45 +02:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 2021 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gdktiffprivate.h"
#include "gdkintl.h"
#include "gdkmemoryformatprivate.h"
#include "gdkmemorytextureprivate.h"
#include "gdkprofilerprivate.h"
#include "gdktexture.h"
#include "gdktextureprivate.h"
#include <tiffio.h>
/* Our main interest in tiff as an image format is that it is
* flexible enough to save all our texture formats without
* lossy conversions.
*
* The loader isn't meant to be a very versatile. It just aims
* to load the subset that we're saving ourselves. For anything
* else, we fall back to TIFFRGBAImage, which is the same api
* that gdk-pixbuf uses.
*/
/* {{{ IO handling */
typedef struct
{
GBytes **out_bytes;
gchar *data;
gsize size;
gsize position;
} TiffIO;
static void
tiff_io_warning (const char *module,
const char *fmt,
va_list ap) G_GNUC_PRINTF(2, 0);
static void
tiff_io_warning (const char *module,
const char *fmt,
va_list ap)
{
g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, fmt, ap);
}
static void
tiff_io_error (const char *module,
const char *fmt,
va_list ap) G_GNUC_PRINTF(2, 0);
static void
tiff_io_error (const char *module,
const char *fmt,
va_list ap)
{
g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_MESSAGE, fmt, ap);
}
static tsize_t
tiff_io_no_read (thandle_t handle,
tdata_t buffer,
tsize_t size)
{
return (tsize_t) -1;
}
static tsize_t
tiff_io_read (thandle_t handle,
tdata_t buffer,
tsize_t size)
{
TiffIO *io = (TiffIO *) handle;
gsize read;
if (io->position >= io->size)
return 0;
read = MIN (size, io->size - io->position);
memcpy (buffer, io->data + io->position, read);
io->position += read;
return (tsize_t) read;
}
static tsize_t
tiff_io_no_write (thandle_t handle,
tdata_t buffer,
tsize_t size)
{
return (tsize_t) -1;
}
static tsize_t
tiff_io_write (thandle_t handle,
tdata_t buffer,
tsize_t size)
{
TiffIO *io = (TiffIO *) handle;
if (io->position > io->size ||
io->size - io->position < size)
{
io->size = io->position + size;
io->data = g_realloc (io->data, io->size);
}
memcpy (io->data + io->position, buffer, size);
io->position += size;
return (tsize_t) size;
}
static toff_t
tiff_io_seek (thandle_t handle,
toff_t offset,
int whence)
{
TiffIO *io = (TiffIO *) handle;
switch (whence)
{
default:
return -1;
case SEEK_SET:
break;
case SEEK_CUR:
offset += io->position;
break;
case SEEK_END:
offset += io->size;
break;
}
if (offset < 0)
return -1;
io->position = offset;
return offset;
}
static int
tiff_io_close (thandle_t handle)
{
TiffIO *io = (TiffIO *) handle;
if (io->out_bytes)
*io->out_bytes = g_bytes_new_take (io->data, io->size);
g_free (io);
return 0;
}
static toff_t
tiff_io_get_file_size (thandle_t handle)
{
TiffIO *io = (TiffIO *) handle;
return io->size;
}
static TIFF *
tiff_open_read (GBytes *bytes)
{
TiffIO *io;
TIFFSetWarningHandler ((TIFFErrorHandler) tiff_io_warning);
TIFFSetErrorHandler ((TIFFErrorHandler) tiff_io_error);
io = g_new0 (TiffIO, 1);
io->data = (char *) g_bytes_get_data (bytes, &io->size);
return TIFFClientOpen ("GTK-read", "r",
(thandle_t) io,
tiff_io_read,
tiff_io_no_write,
tiff_io_seek,
tiff_io_close,
tiff_io_get_file_size,
NULL, NULL);
}
static TIFF *
tiff_open_write (GBytes **result)
{
TiffIO *io;
TIFFSetWarningHandler ((TIFFErrorHandler) tiff_io_warning);
TIFFSetErrorHandler ((TIFFErrorHandler) tiff_io_error);
io = g_new0 (TiffIO, 1);
io->out_bytes = result;
return TIFFClientOpen ("GTK-write", "w",
(thandle_t) io,
tiff_io_no_read,
tiff_io_write,
tiff_io_seek,
tiff_io_close,
tiff_io_get_file_size,
NULL, NULL);
}
/* }}} */
/* {{{ Public API */
typedef struct _FormatData FormatData;
struct _FormatData {
GdkMemoryFormat format;
guint16 bits_per_sample;
guint16 samples_per_pixel;
guint16 sample_format;
guint16 alpha_samples;
};
static const FormatData format_data[] = {
[GDK_MEMORY_B8G8R8A8_PREMULTIPLIED] = { GDK_MEMORY_R8G8B8A8_PREMULTIPLIED, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_ASSOCALPHA },
[GDK_MEMORY_A8R8G8B8_PREMULTIPLIED] = { GDK_MEMORY_R8G8B8A8_PREMULTIPLIED, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_ASSOCALPHA },
[GDK_MEMORY_R8G8B8A8_PREMULTIPLIED] = { GDK_MEMORY_R8G8B8A8_PREMULTIPLIED, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_ASSOCALPHA },
[GDK_MEMORY_B8G8R8A8] = { GDK_MEMORY_R8G8B8A8, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_UNASSALPHA },
[GDK_MEMORY_A8R8G8B8] = { GDK_MEMORY_R8G8B8A8, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_UNASSALPHA },
[GDK_MEMORY_R8G8B8A8] = { GDK_MEMORY_R8G8B8A8, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_UNASSALPHA },
[GDK_MEMORY_A8B8G8R8] = { GDK_MEMORY_R8G8B8A8, 8, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_UNASSALPHA },
[GDK_MEMORY_R8G8B8] = { GDK_MEMORY_R8G8B8, 8, 3, SAMPLEFORMAT_UINT, 0 },
[GDK_MEMORY_B8G8R8] = { GDK_MEMORY_R8G8B8, 8, 3, SAMPLEFORMAT_UINT, 0 },
[GDK_MEMORY_R16G16B16] = { GDK_MEMORY_R16G16B16, 16, 3, SAMPLEFORMAT_UINT, 0 },
[GDK_MEMORY_R16G16B16A16_PREMULTIPLIED] = { GDK_MEMORY_R16G16B16A16_PREMULTIPLIED, 16, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_ASSOCALPHA },
[GDK_MEMORY_R16G16B16A16] = { GDK_MEMORY_R16G16B16A16, 16, 4, SAMPLEFORMAT_UINT, EXTRASAMPLE_UNASSALPHA },
[GDK_MEMORY_R16G16B16_FLOAT] = { GDK_MEMORY_R16G16B16_FLOAT, 16, 3, SAMPLEFORMAT_IEEEFP, 0 },
[GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED] = { GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED, 16, 4, SAMPLEFORMAT_IEEEFP, EXTRASAMPLE_ASSOCALPHA },
[GDK_MEMORY_R16G16B16A16_FLOAT] = { GDK_MEMORY_R16G16B16A16_FLOAT, 16, 4, SAMPLEFORMAT_IEEEFP, EXTRASAMPLE_UNASSALPHA },
[GDK_MEMORY_R32G32B32_FLOAT] = { GDK_MEMORY_R32G32B32_FLOAT, 32, 3, SAMPLEFORMAT_IEEEFP, 0 },
[GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED] = { GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED, 32, 4, SAMPLEFORMAT_IEEEFP, EXTRASAMPLE_ASSOCALPHA },
[GDK_MEMORY_R32G32B32A32_FLOAT] = { GDK_MEMORY_R32G32B32A32_FLOAT, 32, 4, SAMPLEFORMAT_IEEEFP, EXTRASAMPLE_UNASSALPHA },
};
/* if this fails, somebody forgot to add formats above */
G_STATIC_ASSERT (G_N_ELEMENTS (format_data) == GDK_MEMORY_N_FORMATS);
GBytes *
gdk_save_tiff (GdkTexture *texture)
{
TIFF *tif;
int width, height, stride;
const guchar *line;
const guchar *data;
GBytes *result = NULL;
GdkMemoryTexture *memtex;
GdkMemoryFormat format;
const FormatData *fdata = NULL;
tif = tiff_open_write (&result);
width = gdk_texture_get_width (texture);
height = gdk_texture_get_height (texture);
format = gdk_texture_get_format (texture);
fdata = &format_data[format];
if (fdata == NULL)
fdata = &format_data[0];
TIFFSetField (tif, TIFFTAG_SOFTWARE, "GTK");
TIFFSetField (tif, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField (tif, TIFFTAG_IMAGELENGTH, height);
TIFFSetField (tif, TIFFTAG_BITSPERSAMPLE, fdata->bits_per_sample);
TIFFSetField (tif, TIFFTAG_SAMPLESPERPIXEL, fdata->samples_per_pixel);
TIFFSetField (tif, TIFFTAG_SAMPLEFORMAT, fdata->sample_format);
TIFFSetField (tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField (tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
if (fdata->alpha_samples)
TIFFSetField (tif, TIFFTAG_EXTRASAMPLES, 1, &fdata->alpha_samples);
TIFFSetField (tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
TIFFSetField (tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
memtex = gdk_memory_texture_from_texture (texture, fdata->format);
data = gdk_memory_texture_get_data (memtex);
stride = gdk_memory_texture_get_stride (memtex);
line = (const guchar *)data;
for (int y = 0; y < height; y++)
{
if (TIFFWriteScanline (tif, (void *)line, y, 0) == -1)
{
TIFFClose (tif);
g_object_unref (memtex);
return NULL;
}
line += stride;
}
TIFFFlushData (tif);
TIFFClose (tif);
g_assert (result);
g_object_unref (memtex);
return result;
}
static GdkTexture *
load_fallback (TIFF *tif,
GError **error)
{
int width, height;
guchar *data;
GBytes *bytes;
GdkTexture *texture;
TIFFGetField (tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetField (tif, TIFFTAG_IMAGELENGTH, &height);
data = g_malloc (width * height * 4);
if (!TIFFReadRGBAImageOriented (tif, width, height, (guint32 *)data, ORIENTATION_TOPLEFT, 1))
{
g_set_error_literal (error,
GDK_TEXTURE_ERROR, GDK_TEXTURE_ERROR_CORRUPT_IMAGE,
_("Failed to load RGB data from TIFF file"));
g_free (data);
return NULL;
}
bytes = g_bytes_new_take (data, width * height * 4);
texture = gdk_memory_texture_new (width, height,
GDK_MEMORY_R8G8B8A8_PREMULTIPLIED,
bytes,
width * 4);
g_bytes_unref (bytes);
return texture;
}
GdkTexture *
gdk_load_tiff (GBytes *input_bytes,
GError **error)
{
TIFF *tif;
guint16 samples_per_pixel;
guint16 bits_per_sample;
guint16 photometric;
guint16 planarconfig;
guint16 sample_format;
guint16 orientation;
guint32 width, height;
guint16 alpha_samples;
GdkMemoryFormat format;
guchar *data, *line;
gsize stride;
int bpp;
GBytes *bytes;
GdkTexture *texture;
G_GNUC_UNUSED gint64 before = GDK_PROFILER_CURRENT_TIME;
tif = tiff_open_read (input_bytes);
TIFFSetDirectory (tif, 0);
TIFFGetFieldDefaulted (tif, TIFFTAG_SAMPLESPERPIXEL, &samples_per_pixel);
TIFFGetFieldDefaulted (tif, TIFFTAG_BITSPERSAMPLE, &bits_per_sample);
TIFFGetFieldDefaulted (tif, TIFFTAG_SAMPLEFORMAT, &sample_format);
TIFFGetFieldDefaulted (tif, TIFFTAG_PHOTOMETRIC, &photometric);
TIFFGetFieldDefaulted (tif, TIFFTAG_PLANARCONFIG, &planarconfig);
TIFFGetFieldDefaulted (tif, TIFFTAG_ORIENTATION, &orientation);
TIFFGetFieldDefaulted (tif, TIFFTAG_IMAGEWIDTH, &width);
TIFFGetFieldDefaulted (tif, TIFFTAG_IMAGELENGTH, &height);
if (samples_per_pixel == 4)
{
guint16 extra;
guint16 *extra_types;
if (TIFFGetField (tif, TIFFTAG_EXTRASAMPLES, &extra, &extra_types))
alpha_samples = extra_types[0];
else
alpha_samples = 0;
if (alpha_samples != 0 && alpha_samples != EXTRASAMPLE_ASSOCALPHA && alpha_samples != EXTRASAMPLE_UNASSALPHA)
{
texture = load_fallback (tif, error);
TIFFClose (tif);
return texture;
}
}
else
alpha_samples = 0;
for (format = 0; format < G_N_ELEMENTS (format_data); format++)
{
/* not a native format */
if (format_data[format].format != format)
continue;
if (format_data[format].sample_format == sample_format &&
format_data[format].bits_per_sample == bits_per_sample &&
format_data[format].samples_per_pixel == samples_per_pixel &&
format_data[format].alpha_samples == alpha_samples)
{
break;
}
}
if (format == G_N_ELEMENTS(format_data) ||
photometric != PHOTOMETRIC_RGB ||
planarconfig != PLANARCONFIG_CONTIG ||
TIFFIsTiled (tif) ||
orientation != ORIENTATION_TOPLEFT)
{
texture = load_fallback (tif, error);
TIFFClose (tif);
return texture;
}
stride = width * gdk_memory_format_bytes_per_pixel (format);
g_assert (TIFFScanlineSize (tif) == stride);
data = g_try_malloc_n (height, stride);
if (!data)
{
g_set_error (error,
GDK_TEXTURE_ERROR, GDK_TEXTURE_ERROR_TOO_LARGE,
_("Not enough memory for image size %ux%u"), width, height);
TIFFClose (tif);
return NULL;
}
line = data;
for (int y = 0; y < height; y++)
{
if (TIFFReadScanline (tif, line, y, 0) == -1)
{
g_set_error (error,
GDK_TEXTURE_ERROR, GDK_TEXTURE_ERROR_CORRUPT_IMAGE,
_("Reading data failed at row %d"), y);
TIFFClose (tif);
g_free (data);
return NULL;
}
line += stride;
}
bpp = gdk_memory_format_bytes_per_pixel (format);
bytes = g_bytes_new_take (data, width * height * bpp);
texture = gdk_memory_texture_new (width, height,
format,
bytes, width * bpp);
g_bytes_unref (bytes);
TIFFClose (tif);
if (GDK_PROFILER_IS_RUNNING)
{
gint64 end = GDK_PROFILER_CURRENT_TIME;
if (end - before > 500000)
gdk_profiler_add_mark (before, end - before, "tiff load", NULL);
}
return texture;
}
/* }}} */
/* vim:set foldmethod=marker expandtab: */
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