BYTE Red;
BYTE Green;
BYTE Blue;
short Pixel;
///...<snip>... obtain pixel data into Pixel variable
Red = Pixel >> 11;
Green = (Pixel << 5) >> 10;
Blue = Pixel % 32;
Extracting color values from an R5G6B5 short
Author
I'm wondering what would be the best way to extract RGB values from a short which contains R5G6B5 formatted data. I plan to use the following code, but I wanted to check if there is a better way. Any suggestions? Thanks in advance!
Red = Pixel >> 11;
Green = (Pixel >> 5) & 0x6F;
Blue = Pixel & 0x3F;
?
dunno, i hope that helps.
Green = (Pixel >> 5) & 0x6F;
Blue = Pixel & 0x3F;
?
dunno, i hope that helps.
Author
That''s a good idea, using the & operator.
But shouldn''t your hex values be as follows?
But shouldn''t your hex values be as follows?
Red = Pixel >> 11; //Bit shift right by 11Green = (Pixel >> 5) & 0x3F; //Bit shift right by 5, then & out all but last 6 bitsBlue = Pixel & 0x1F; //& out all but last 5 bits
You may also need to convert the ranges from 0-31 and 0-63 to 0-255.
The quick way is this:
But the colors may look bad (yellow will have a green tint)
This way looks better but it is slower:
The quick way is this:
Red = ( Pixel >> (16-8) ) & 0xF8; Green = ( Pixel >> (11-8) ) & 0xFC; Blue = Pixel << (8-5); But the colors may look bad (yellow will have a green tint)
This way looks better but it is slower:
Red = ( Pixel >> (16-5) ) * 255 / 31; Green = ( ( Pixel >> (11-6) ) & 0x3F ) * 255 / 63; Blue = ( Pixel & 0x1F ) * 255 / 31; This topic is closed to new replies.
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