Re: [DotGNU]bmp's

[Oscar Papel]

If you send me an image, I'll convert it for you.

I also have written this type of code in the past. 

I treated each pixel as a uint16 and combined them as follows:

 

// note: this code assumes little-endian CPU

byte red,green,blue,alpha;

 

// RGB24 to RGB15 (x-5-5-5)

uint16 pixel=(((uint16)blue<<10) & 0x7C00) |

    (((uint16)green<<5) & 0x03E0) |

    (((uint16)red) & 0x001F);

 

// RGBA32 to RGBA16 (1-5-5-5)

uint16 pixel=(((uint16)alpha<<15) & 0x8000) |

    (((uint16)blue<<10) & 0x7C00) |

    (((uint16)green<<5) & 0x03E0) |

    (((uint16)red) & 0x001F);

 

// RGB24 to RGB16 (5-6-5)

uint16 pixel=(((uint16)blue<<11) & 0xF800) |

    (((uint16)green<<5) & 0x07E0) |

    (((uint16)red) & 0x001F) ;

 

----- Original Message -----

From: Neil Cawse

To: address@hidden

Sent: Monday, October 27, 2003 10:46 AM

Subject: [DotGNU]bmp's

Im working on finishing off bmp support in DotGNU.Images.

Im having a problem finding a program that can convert a 24 bit bitmap(bmp) to 16 bit.

The 16 bit format is uncommon for writing and comes in two varieties – 5-5-5 and 5-6-5.

Is there anyone who could convert and image for me for testing or give me an image in these two formats?

 

Thanks

Neil