Re: [Boost-users] [GIL] Packing to 6 bytes

Thank you Lubomir, I will check this soon :) Happy new year ! Eloi. 2010/1/4 Lubomir Bourdev

Hi Eloi,

Try calling copy_and_convert_pixels. I believe it does what you want.

Lubomir

*From:* boost-users-bounces@lists.boost.org [mailto: boost-users-bounces@lists.boost.org] *On Behalf Of *Eloi Du Bois *Sent:* Wednesday, December 16, 2009 2:18 AM *To:* boost-users@lists.boost.org *Subject:* [Boost-users] [GIL] Packing to 6 bytes

Hi,

I have a question: I need to create a view that hold 12 bit channel data packed as follow:

0000R0000G0000B0000;0000R0000G0000B0000;0000R0000G0000B0000;.... Meaning that each channel is shifted by 4 bits. The pixel is holden on 48 bits = 6 bytes.

I have created my view like as follow: /// My 12 bits special rgb packed to 6 bytes typedef const packed_channel_reference rgb12_packed_channel0_t; typedef const packed_channel_reference rgb12_packed_channel1_t; typedef const packed_channel_reference rgb12_packed_channel2_t; typedef mpl::vector3 rgb12_packed_channels_t; typedef packed_pixel, rgb12_packed_channels_t, rgb_layout_t> rgb12_packed_pixel_t; typedef view_type_from_pixel::type rgb12_packed_view_t;

The thing is that I would now like to copy data to another rgb16_view_t... But this is not working because, in my opinion, 48 bits is between 32 and 64. I have been thinking of the solution that Christian gave me and that consist on doing something like this: T p( pData, 0 );

for( typename DST_V::y_coord_t y = 0; y < height; ++y ) { typename DST_V::x_iterator it = dst.row_begin( y );

for( typename DST_V::x_coord_t x = 0; x < width; ++x ) { color_convert( *p, *it ); ++p; ++it; } }

where T is a bit_aligned_pixel_iterator and DST_V=rgb16_view_t but this can't be working on my case because channels are shifted by 4 bits !

If you could help me, I would really appreciate. I think all those cases are a good robustness test for gil.

Regards, Eloi.

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