U++ framework: 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 #28024 is a reply to message #27616]

Fri, 13 August 2010 11:13

mirek
Messages: 14290
Registered: November 2005

Ultimate Member

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

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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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