Save as animated gif?
BlitzMax Forums/BlitzMax Programming/Save as animated gif?
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| Is there a library around that will let me save a collection of frames as an animated gif by any chance? Or can someone point me in the right direction? |
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| Yes, FreeImage. Brucey in his boundless wisdom wrote a wrapper for it so that it can be utilized by us (BlitzMaxers) without having to get our hands dirty in C. Download the documentation and search for "Multipage functions". |
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| Was taking a look at it, but saw no way to create an animated gif...i'll take another look I guess. Thanks |
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| Would be nice to have MNG support. |
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| FreeImage says that they are working on that. |
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| Be interesting to see how `SavePixmapMNG` works, when it would need multiple pixmaps to save an animation. ? |
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| This question was asked recently in this topic. It's been a while since I worked with Freeimage but from memory I don't think I ever managed to create an animated gif (only single frame gif) so either you can't or it is really difficult to figure out. I do wonder why anyone actually needs this feature but I would suggest you look at Brucey's other image modules. If all else fails you could make your own module from some C++ code such as this. |
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| Sorry, all I could find was this. Dredging up research: number 0.5 number 2 Wow, spent well over an hour looking for problems people have had with FreeImage, specifically its GIF capabilities. You just spoil us, don't you BRL? (make it easy; not a bad thing, ha) Anyway, Retimer, I don't think that the FreeImage library really abstracts the specific details all that much, so you will probably have to become knowledgeable of the GIF specification. From FreeImage changelog: May 7th, 2005 - 3.7.0 ! FreeImage now uses libTIFF 3.7.2 ! [Ryan Rubley] improved FreeImage_OpenMultiBitmap + [Detlev Vendt] added FreeImage_ZLibGUnzip + [Herve Drolon] added new image data types FIT_RGB16, FIT_RGBA16, FIT_RGBF, FIT_RGBAF + [Herve Drolon] FreeImage_FlipHorizontal & FreeImage_FlipVertical now work with any bitmap type + [Herve Drolon] added conversions to float and double in FreeImage_ConvertToType + [Herve Drolon] added FreeImage_ConvertToRGBF + [Herve Drolon] added support for 16-, 48- and 96-bit images to FreeImage_Rescale + [Ryan Rubley] added FreeImage_ColorQuantizeEx + [Ryan Rubley] added FIMD_ANIMATION and FIDT_PALETTE + [Ryan Rubley] added brand new PluginGIF with full animation multipage and metadata support + [Herve Drolon] added support for FIC_MINISWHITE 8-bit images to FreeImage_Rescale + [Herve Drolon] added HDR (High Dynamic Range) format (loader & writer) + [Herve Drolon] added support for 48-bit images in TIFF plugin + [Herve Drolon] added support for 48-bit images in PNG plugin + [Herve Drolon] added tone mapping operators (see below) + added FreeImage_ToneMapping + added FreeImage_TmoDrago03 + added FreeImage_TmoReinhard05 + [Petr Pytelka] added FreeImage_JPEGTransform * [Herve Drolon] allowed loading of corrupted JPEG with a premature end of file * [Herve Drolon] fixed a memory leak with loading of exif JPEG images * [Detlev Vendt] changed some 'pointer-to-int' casts to 'pointer-to-long' for 64bit machines * [Ryan Rubley] fixed a memory leak in the multipage API * [Ryan Rubley] updated VB6 wrapper generation for new functions * [Herve Drolon] fixed incorrect behavior when reading JPEG comments containing special characters * [Herve Drolon] fixed incorrect behavior when reading JPEG ICC profiles with a size greater than 64 KB * [Herve Drolon] fixed a bug in TIFF plugin when loading malformed multipage TIFF * [Herve Drolon] fixed PluginTIFF not being thread safe |
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| Anyway, Retimer, I don't think that the FreeImage library really abstracts the specific details all that much, so you will probably have to become knowledgeable of the GIF specification. Yeah...I was afraid of that... I've been using php to generate gifs from multiple pngs for now, but I suppose i'll give this a try sometime. Thanks for looking deeply into it heh :) |
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| If you know about Warner's contribution in the code archive then disregard this post. It was (sort of) here all along: read the comments too |
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| No that only loads gifs, he wanted to save them. |
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| Yeah, it requires a good amount of play with the gif specification. I managed to write my own binary write up to match the specs and save an image as a gif, but the animated gif specification gave me a lot of trouble - I haven't had the time to play with it more yet. I'de love to get it finished and throw it up on code archives, or as a module release sometime, although I haven't studied the licensing scheme for the gif patent (I think I remember controversy within it?). I guess that would be up to the person using it. |
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| No controversy now, the LZW patent was dropped. http://en.wikipedia.org/wiki/Graphics_Interchange_Format#Unisys_and_LZW_patent_enforcement |
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| Oh, nice! Thanks... |
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| Retimer, if you want to contribute to this module it would be much appreciated! http://max-edit.googlecode.com/svn/trunk/mod/axe.mod/gif.mod example encoder, needs palette conversion and animation support: http://max-edit.googlecode.com/svn/trunk/mod/axe.mod/gif.mod/gif/writegif.bmx |
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