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Bug 72

Summary: SDL_Image patch for ILBM Amiga images
Product: SDL_image Reporter: Sam Lantinga <slouken>
Component: miscAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: unspecified   
Hardware: All   
OS: All   
Attachments: sdlimage-ilbm-amiga-modes.2.diff

Description Sam Lantinga 2006-01-24 01:19:19 UTC 
Date: Tue, 1 Apr 2003 11:43:04 +0200
From: David Raulo <david.raulo@free.fr>(by way of David Raulo <david.raulo@free.fr>)
Subject: [SDL] SDL_Image patch for ILBM Amiga images

Hi all,

Here's a patch for SDL_Image, adding support for classic Amiga ILBM formats:
- fixes a small bug with stencil (images with a transparent color but no
stencil/mask plane could not be read)
- fixes colormap for EHB ("Extra Half Brite") mode (these images have 6
bitplanes, but the colormap only contains 32 colors. The second half of the
colormap has to be a copy of the first one, with brightness divided by 2)
- adds support for HAM ("Hold And Modify") and HAM8 modes. These are
converted to 24bits images.

Detailed information about these formats can be found on
http://netghost.narod.ru/gff/graphics/summary/iff.htm

The attached patch is a unidiff against SDL_Image version 1.2.3.
Comment 1 Sam Lantinga 2006-01-24 01:20:38 UTC 
Created attachment 31 [details]
sdlimage-ilbm-amiga-modes.2.diff

This diff doesn't apply cleanly anymore.
Comment 2 Ryan C. Gordon 2006-01-27 11:23:22 UTC 
Setting Sam as "QA Contact" on all bugs (even resolved ones) so he'll definitely be in the loop to any further discussion here about SDL.

--ryan.
Comment 3 Sam Lantinga 2006-05-01 04:03:06 UTC 
It looks like this functionality is already in SDL_image in subversion.