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Save resolution information if it is different from 72 dpi

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Riccardo Mottola 2017-06-17 23:18:39 +02:00 committed by Ivan Vučica
parent fc8c034aca
commit 4ba0fa25cc
2 changed files with 21 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2017-06-17 Riccardo Mottola <rm@gnu.org>
* Source/NSBitmapImageRep+JPEG.m
Save resolution information if it is different from 72 dpi.
2017-06-13 Fred Kiefer <FredKiefer@gmx.de>
* Source/externs.m: Added semicolons missing in last commit.

15
Source/NSBitmapImageRep+JPEG.m
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@ -552,6 +552,7 @@ static void gs_jpeg_memory_dest_destroy (j_compress_ptr cinfo)
int sPP;
int width;
int height;
NSSize size;
int row_stride;
int quality = 90;
NSNumber *qualityNumber;
@ -639,6 +640,20 @@ static void gs_jpeg_memory_dest_destroy (j_compress_ptr cinfo)
jpeg_set_defaults (&cinfo);
// resolution/density
size = [self size];
if (width != (int)(size.width) || height != (int)(size.height))
{
unsigned x_density, y_density;
x_density = (unsigned)floorf(width * 72 / size.width + 0.5);
y_density = (unsigned)floorf(height * 72 / size.height + 0.5);
cinfo.X_density = x_density;
cinfo.Y_density = y_density;
cinfo.density_unit = 1;
}
// set quality
// we expect a value between 0..1, 0 being lowest, 1 highest quality
qualityNumber = [properties objectForKey: NSImageCompressionFactor];