[gdi+] DrawImage to specified size

[mmscg]

I am trying to draw a bitmap on the screen 1" X 1.5" using this code:

    status = GdipDrawImageRectRect(graphics, image, _
                                   0, 0, 1, 1.5 , _
                                   0, 0, 192, 288, _
                                   UnitPixel)

The image draws correctly but draws to 1.3"X2"

What am I doing wrong?

[MrViggy]

Maybe try specifying UnitInch instead of 'UnitPixel'?

Viggy

[mmscg]

Thanks for the suggestion.

I tried that; I get an error when GdipDrawImageRectRect executes
(and obviously nothing gets drawn).

[MrViggy]

I'm not all that familiar with the GDI+ functions (anymore, it's been a while since I played around with them). Post the error, perhaps someone else can help.

Viggy

[mmscg]

If I set the last parameter of the GdipDrawImageRectRect function to UnitInch I get a Not Implemented error

If I do as below I get proper drawing except not to the specified dimension (want 1" X 1.5" get 1.3" X 2").

status = GdipSetPageUnit(graphics, UnitInch)
status = GdipDrawImageRectRect(graphics, image, _
                               0, 0 1, 1.5, _
                               0, 0, 192, 288, _
                               UnitPixel)

It is always out by a constant factor.
If I adjust to accomodate for this by multiplying by 72 / 96 as below it works properly.

status = GdipSetPageUnit(graphics, UnitInch)
status = GdipDrawImageRectRect(graphics, image, _
                               0, 0, 1 * 72 / 96, 1.5 * 72 / 96, _
                               0, 0, 192, 288, _
                               UnitPixel)

...but I don't understand the significance of * 72 / 96