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Allow override of EXIF Orientation tag #189

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Clear Orientation when rotate/flip/flop are used
This commit is contained in:
Lovell Fuller
2015-07-13 20:00:33 +01:00
parent 642e5687b6
commit d303703dc5
7 changed files with 130 additions and 11 deletions
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22
src/common.cc
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@@ -25,6 +25,8 @@
#endif
#endif
#define EXIF_IFD0_ORIENTATION "exif-ifd0-Orientation"
namespace sharp {
// How many tasks are in the queue?
@@ -141,14 +143,30 @@ namespace sharp {
int orientation = 0;
const char *exif;
if (
vips_image_get_typeof(image, "exif-ifd0-Orientation") != 0 &&
!vips_image_get_string(image, "exif-ifd0-Orientation", &exif)
vips_image_get_typeof(image, EXIF_IFD0_ORIENTATION) != 0 &&
!vips_image_get_string(image, EXIF_IFD0_ORIENTATION, &exif)
) {
orientation = atoi(&exif[0]);
}
return orientation;
}
/*
Set EXIF Orientation of image.
*/
void SetExifOrientation(VipsImage *image, int const orientation) {
char exif[3];
g_snprintf(exif, sizeof(exif), "%d", orientation);
vips_image_set_string(image, EXIF_IFD0_ORIENTATION, exif);
}
/*
Remove EXIF Orientation from image.
*/
void RemoveExifOrientation(VipsImage *image) {
vips_image_remove(image, EXIF_IFD0_ORIENTATION);
}
/*
Returns the window size for the named interpolator. For example,
a window size of 3 means a 3x3 pixel grid is used for the calculation.