Re: [Imtoolkit-users] Supporting Alpha in TGA files.

[Antonio S. <sc...@te...>]

   Just commited to CVS.

 

Thanks,

scuri

 

From: Nicolas Noble [mailto:ni...@no...] 
Sent: quinta-feira, 12 de agosto de 2010 16:07
To: imt...@li...
Subject: [Imtoolkit-users] Supporting Alpha in TGA files.

 

Hello,

 

  I recently was surprised to discover that IM doesn't support writing TGA
files that include an Alpha channel. I wrote a very simple patch for it, and
it seems to be working fine, so I figured I'd share it.

 

  Cheers,

 

  -- Nicolas Noble

 

 

 

---
<http://git.grumpycoder.net/cgi-bin/gitweb.cgi?p=lua-modules-iup;a=blob;f=im
/src/im_format_tga.cpp;h=7c24a28a8d5f1ea1a500cba12b1534af0607006e>
im/src/im_format_tga.cpp

+++
<http://git.grumpycoder.net/cgi-bin/gitweb.cgi?p=lua-modules-iup;a=blob;f=im
/src/im_format_tga.cpp;h=f15b25f0a91d61c4c32a370e712f0532a884375e;hb=0a44ec3
515eb9f7d2bed08cad79dff4d7524d818> im/src/im_format_tga.cpp

 

@@
<http://git.grumpycoder.net/cgi-bin/gitweb.cgi?p=lua-modules-iup;a=blob;f=im
/src/im_format_tga.cpp;h=7c24a28a8d5f1ea1a500cba12b1534af0607006e#l475>
-475,7
<http://git.grumpycoder.net/cgi-bin/gitweb.cgi?p=lua-modules-iup;a=blob;f=im
/src/im_format_tga.cpp;h=f15b25f0a91d61c4c32a370e712f0532a884375e;hb=0a44ec3
515eb9f7d2bed08cad79dff4d7524d818#l475> +475,13 @@ int
imFileFormatTGA::WriteImageInfo()

       this->image_type = 1;

     break;

   case IM_RGB:

-    this->bpp = 24;

+    if (imColorModeHasAlpha(this->user_color_mode))

 

+    {

+      this->bpp = 32;

 

+      this->file_color_mode |= IM_ALPHA;

+    }

 

+    else

+      this->bpp = 24;

 

     this->file_color_mode |= IM_PACKED;

     if (imStrEqual(this->compression, "RLE"))

 

       this->image_type = 10;