p/fiv
1
1
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

Hardcode Exif orientation in thumbnails

Browse Source
This commit is contained in:
Přemysl Eric Janouch
2021-12-28 23:10:45 +01:00
parent bf47782f0a
commit 98bdab443a
4 changed files with 99 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
fiv-io.c
View File

@@ -2627,6 +2627,61 @@ fiv_io_save(cairo_surface_t *page, cairo_surface_t *frame, FivIoProfile target,
// --- Metadata ----------------------------------------------------------------
gboolean
fiv_io_orientation_is_sideways(FivIoOrientation orientation)
{
switch (orientation) {
case FivIoOrientation90:
case FivIoOrientationMirror90:
case FivIoOrientation270:
case FivIoOrientationMirror270:
return TRUE;
default:
return FALSE;
}
}
cairo_matrix_t
fiv_io_orientation_matrix(
FivIoOrientation orientation, double width, double height)
{
cairo_matrix_t matrix = {};
cairo_matrix_init_identity(&matrix);
switch (orientation) {
case FivIoOrientation90:
cairo_matrix_rotate(&matrix, -M_PI_2);
cairo_matrix_translate(&matrix, -width, 0);
break;
case FivIoOrientation180:
cairo_matrix_scale(&matrix, -1, -1);
cairo_matrix_translate(&matrix, -width, -height);
break;
case FivIoOrientation270:
cairo_matrix_rotate(&matrix, +M_PI_2);
cairo_matrix_translate(&matrix, 0, -height);
break;
case FivIoOrientationMirror0:
cairo_matrix_scale(&matrix, -1, +1);
cairo_matrix_translate(&matrix, -width, 0);
break;
case FivIoOrientationMirror90:
cairo_matrix_rotate(&matrix, +M_PI_2);
cairo_matrix_scale(&matrix, -1, +1);
cairo_matrix_translate(&matrix, -width, -height);
break;
case FivIoOrientationMirror180:
cairo_matrix_scale(&matrix, +1, -1);
cairo_matrix_translate(&matrix, 0, -height);
break;
case FivIoOrientationMirror270:
cairo_matrix_rotate(&matrix, -M_PI_2);
cairo_matrix_scale(&matrix, -1, +1);
default:
break;
}
return matrix;
}
FivIoOrientation
fiv_io_exif_orientation(const guint8 *tiff, gsize len)
{