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Add ASEPRITE1.0 block to .gif files

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This commit is contained in:
David Capello 2014-06-04 00:27:34 -03:00
parent 289b729e3e
commit 786ae48ffa
1 changed files with 19 additions and 6 deletions
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25
src/app/file/gif_format.cpp
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@ -628,23 +628,36 @@ bool GifFormat::onSave(FileOp* fop)
// Specify loop extension.
if (frame_num == 0 && loop >= 0) {
unsigned char extension_bytes[11];
if (EGifPutExtensionLeader(gif_file, APPLICATION_EXT_FUNC_CODE) == GIF_ERROR)
throw Exception("Error writing GIF graphics extension record for frame %d.\n", (int)frame_num);
throw Exception("Error writing GIF graphics extension record (header section).");
unsigned char extension_bytes[11];
memcpy(extension_bytes, "NETSCAPE2.0", 11);
if (EGifPutExtensionBlock(gif_file, 11, extension_bytes) == GIF_ERROR)
throw Exception("Error writing GIF graphics extension record for frame %d.\n", (int)frame_num);
throw Exception("Error writing GIF graphics extension record (first block).");
extension_bytes[0] = 1;
extension_bytes[1] = (loop & 0xff);
extension_bytes[2] = (loop >> 8) & 0xff;
if (EGifPutExtensionBlock(gif_file, 3, extension_bytes) == GIF_ERROR)
throw Exception("Error writing GIF graphics extension record for frame %d.\n", (int)frame_num);
throw Exception("Error writing GIF graphics extension record (second block).");
if (EGifPutExtensionTrailer(gif_file) == GIF_ERROR)
throw Exception("Error writing GIF graphics extension record for frame %d.\n", (int)frame_num);
throw Exception("Error writing GIF graphics extension record (trailer section).");
}
// Add Aseprite block (at this moment, it's empty).
if (frame_num == 0) {
if (EGifPutExtensionLeader(gif_file, APPLICATION_EXT_FUNC_CODE) == GIF_ERROR)
throw Exception("Error writing GIF comment (header section).");
unsigned char extension_bytes[11];
memcpy(extension_bytes, "ASEPRITE1.0", 11);
if (EGifPutExtensionBlock(gif_file, sizeof(extension_bytes), extension_bytes) == GIF_ERROR)
throw Exception("Error writing GIF comment (first block).");
if (EGifPutExtensionTrailer(gif_file) == GIF_ERROR)
throw Exception("Error writing GIF comment (trailer section).");
}
// Write graphics extension record (to save the duration of the