[osg-users] how to render 16bit depth image

[Bruno Oliveira]

I intend to render a 16 bit per channel, 4 channel image, i.e., each pixel
is 4 x unsigned 16bit (uint16_t) RGBA, leading to 64bit per pixel.

2016-07-20 8:48 GMT+01:00 Sebastian Messerschmidt <
sebastian.messerschmidt at gmx.de>:

> Hi Bruno,
>
> Ok so I meant GL_ vars. Could you suggest any code for substituting that
> setImage line? Thank you
>
>
> To what end? You haven't told us, what you want to achieve, except from
> using integer.
> If you want to fill it with 16bit integer values you probably need
>
>
> internal: GL_R16UI
> format: GL_RED_INTEGER
> type: GL_UNSIGNED_SHORT
>
> will give you a format, where the red channel is 16bit with unsigned
> values and your source type is unsigned short values.
>
> Cheers
> Sebastian
>
>
> On 19 Jul 2016, at 09:35, Sebastian Messerschmidt <
> sebastian.messerschmidt at gmx.de> wrote:
>
> Hi Bruno,
>
> Sorry but I didn't quite catch that.
> What do you mean by "but I thing you need to use GL_RGBA_INTEGER_EXT as
> source"
>
> The source type needs to be GL_RGBA_INTEGER_EXT afaik when using integer
> textures.
>
> Alternatively, how can I replace the macros in that setImage function call?
>
> Which macros? The GL_ are constants.
>
> Cheers
> Sebastian
>
>
> 2016-07-19 8:45 GMT+01:00 Sebastian Messerschmidt <
> sebastian.messerschmidt at gmx.de>:
>
>> Hi,
>>
>> Your internal format needs to be 16bit per channel to I think, so
>> GL_UNSIGNED_INT_8_8_8_8_REV might be inappropriate.
>> GL_R16UI might do, but I thing you need to use GL_RGBA_INTEGER_EXT as
>> source. Alternatively you can use GL_LUMINANCE with GL_LUMINACE16F.
>>
>> What exactly are you doing with the image?
>>
>> Cheers
>> Sebastian
>>
>> Hello,
>>
>> I have a 16bit per channel, 4 channel, image. The format is short
>> (uint16_t). Note that this image is scaled to the full 16bit depth [0,
>> 65536]
>>
>>
>> I have this code that works well for a 8bit, 4 channel image:
>>
>> osg::ref_ptr<osg::Image> image = new osg::Image();
>>  image->setImage(ImageSize, ImageSize,1,
>> GL_RGBA8,
>> GL_RGBA,
>> GL_UNSIGNED_INT_8_8_8_8_REV,
>> MyDataPtr,
>> osg::Image::NO_DELETE);
>>
>>
>>
>> Now I want to por this to 16bit depth.
>> How is this done?
>>
>> I tried
>>
>>  image->setImage(ImageSize, ImageSize,1,
>> GL_RGBA16UI,
>> GL_RGBA,
>> GL_UNSIGNED_INT_8_8_8_8_REV,
>> MyDataPtr,
>> osg::Image::NO_DELETE);
>>
>> But this yields all black textures. How can I do this without converting
>> my 16bit image pixel data?
>>
>>
>> _______________________________________________
>> osg-users mailing listosg-users at lists.openscenegraph.orghttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>>
>>
>> _______________________________________________
>> osg-users mailing list
>> osg-users at lists.openscenegraph.org
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>>
>
>
> _______________________________________________
> osg-users mailing listosg-users at lists.openscenegraph.orghttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
>
> _______________________________________________
> osg-users mailing listosg-users at lists.openscenegraph.orghttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20160720/71fd9428/attachment-0003.htm>