[texhax] includegraphics and image scaling

[Peter Davis]

On Fri, Dec 10, 2010 at 1:35 AM, Heiko Oberdiek <
heiko.oberdiek at googlemail.com> wrote:

> On Thu, Dec 09, 2010 at 11:12:36PM -0500, Peter Davis wrote:
>
> > http://www.pfdstudio.com/images/Chrysanthemum.jpg
>
> Quick results of:
>
> * file:
>  JPEG image data, JFIF standard 1.02, resolution (DPI), 96 x 96
> * bmpsize-test:
>  Type: jpg
>  Pixel width: 1024 px
>  Pixel height: 768 px
>  Density x: 96 dots per 72.27pt
>  Density y: 96 dots per 72.27pt
>  Width: 767.99854 bp
>  Height: 575.99863 bp
> pdfTeX:
>  770.87813pt, 578.15858pt
> XeTeX:
>  1027.83746pt, 770.87813pt
> ImageMagick 5.5.7:
>    x-Resolution: 72/1
>    y-Resolution: 72/1
>  Resolution: 96x96 pixels/inch
>
>
Thank you, Heiko.  So it appears that pdfTeX gets it right, but ImageMagick
and XeTeX incorrectly use 72dpi as the resolution.

If I could use the fontspec package with pdfTeX, I'd switch to that.  As is,
I suppose I have to check the pixel dimensions and resolution somehow in my
own code, and simply specify the desired width and height in the tex file.

Thank you.

-pd
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