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Home » U++ Library support » Draw, Display, Images, Bitmaps, Icons » How to set the dpi (dots per inch) of an image

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Re: How to set the dpi (dots per inch) of an image [message #28035 is a reply to message #28024]

Fri, 13 August 2010 13:46

koldo is currently offline

koldo
Messages: 3356
Registered: August 2008

Senior Veteran

luzr wrote on Fri, 13 August 2010 11:13

koldo wrote on Mon, 26 July 2010 03:50

Likewise, the same dpi detection would have to be added when reading a png file in bool PNGRaster::Init(), after png_read_info():

	png_read_info(data->png_ptr, data->info_ptr);
/// Begin
	png_uint_32 xres, yres;
	int unitType = PNG_RESOLUTION_METER;
	png_get_pHYs(data->png_ptr, data->info_ptr, &xres, &yres, &unitType);
	unsigned xdpi = unsigned(xres*0.0254);
	unsigned ydpi = unsigned(yres*0.0254);
/// End
	return true;

Here the question is where to put readed xdpy and ydpi in U++ code.

If you have this tested and working, please submit files as patch...

Mirek

Hello Mirek

Now xdpy and ydpi do not exist internally. It would be necessary to define how to get/set them, prior to adding the code.

Best regards
Iñaki

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[Message index]

		How to set the dpi (dots per inch) of an image By: koldo on Thu, 15 July 2010 11:07
		Re: How to set the dpi (dots per inch) of an image By: mirek on Sat, 17 July 2010 09:58
		Re: How to set the dpi (dots per inch) of an image By: koldo on Mon, 19 July 2010 10:03
		Re: How to set the dpi (dots per inch) of an image By: mirek on Fri, 23 July 2010 11:37
		Re: How to set the dpi (dots per inch) of an image By: koldo on Sat, 24 July 2010 11:08
		Re: How to set the dpi (dots per inch) of an image By: koldo on Mon, 26 July 2010 09:50
		Re: How to set the dpi (dots per inch) of an image By: mirek on Fri, 13 August 2010 11:13
		Re: How to set the dpi (dots per inch) of an image By: koldo on Fri, 13 August 2010 13:46
		Re: How to set the dpi (dots per inch) of an image By: koldo on Sun, 22 August 2010 23:51
		Re: How to set the dpi (dots per inch) of an image By: mirek on Wed, 08 September 2010 09:17
		Re: How to set the dpi (dots per inch) of an image By: koldo on Fri, 10 September 2010 11:41
		Re: How to set the dpi (dots per inch) of an image By: koldo on Fri, 10 September 2010 13:42
		Re: How to set the dpi (dots per inch) of an image By: mirek on Mon, 13 September 2010 17:33
		Re: How to set the dpi (dots per inch) of an image By: koldo on Mon, 13 September 2010 21:56
		Re: How to set the dpi (dots per inch) of an image By: koldo on Tue, 14 September 2010 09:51
		Re: How to set the dpi (dots per inch) of an image By: koldo on Wed, 15 September 2010 09:17
		Re: How to set the dpi (dots per inch) of an image By: koldo on Wed, 15 September 2010 13:38
		Re: How to set the dpi (dots per inch) of an image By: koldo on Wed, 15 September 2010 15:02
		Re: How to set the dpi (dots per inch) of an image By: mirek on Thu, 16 September 2010 23:49
		Re: How to set the dpi (dots per inch) of an image By: koldo on Fri, 17 September 2010 09:58
		Re: How to set the dpi (dots per inch) of an image By: koldo on Fri, 17 September 2010 10:39
		Re: How to set the dpi (dots per inch) of an image By: mirek on Fri, 17 September 2010 20:17
		Re: How to set the dpi (dots per inch) of an image By: koldo on Fri, 17 September 2010 22:29

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