Re: How to get image real number of bits per pixel
Re: How to get image real number of bits per pixel
- Subject: Re: How to get image real number of bits per pixel
- From: "Sebastien TOPIN" <email@hidden>
- Date: Tue, 25 Feb 2003 18:14:13 +0100
Thanks but how do you get the image data? Is it directly from the file?
I was trying to use the drag'n drop functionality (drag an image from the
Finder to your application image control) in order to open my image file. In
this case I already get an instantiated NSBitmapImageRep from NSImageView
and just extract its parameters. This is what gives me the 32 bits per
pixel.
----- Original Message -----
From: "Marco Binder" <email@hidden>
To: "Sebastien TOPIN" <email@hidden>
Cc: <email@hidden>
Sent: Tuesday, February 25, 2003 5:57 PM
Subject: Re: How to get image real number of bits per pixel
>
Directly instantiate an NSBitmapImageRep with the image-data and call
>
the method. As to my experience, Cocoa will always use 8-bit RGBA to
>
display images in an NSImageView.
>
>
marco
>
>
>
Am Dienstag, 25.02.03 um 17:21 Uhr schrieb Sebastien TOPIN:
>
>
> Hi Folks,
>
>
>
> I am trying to get the real number of bits per pixel for a displayed
>
> image.
>
> A NSImageView object enables me to drag n' drop a bmp image from the
>
> Finder
>
> and display it in my app.
>
> Then I got an NSBitmapImageRep from the NSImageView and did that:
>
>
>
> int iBitsPerPix = [bittmapImageRep bitsPerPixel];
>
>
>
> The result is always 32 even for grayscale 8 bits per pixel images or
>
> 24 bits
>
> per pixel color images.
>
>
>
> How can I get the image real number of bits per pixel of those images?
>
>
>
> Thanks in advance,
>
> Seb
>
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