Commit 4120fccf authored by Manuel Günther's avatar Manuel Günther Committed by André Anjos

Fixed handling of multi-frame gif (now, the last frame is used); improved Error reporting

parent e51d59da
......@@ -415,21 +415,17 @@ static void im_load_color(boost::shared_ptr<GifFileType> in_file, bob::io::base:
GifByteType *extension;
int InterlacedOffset[] = { 0, 4, 2, 1 }; // The way Interlaced image should.
int InterlacedJumps[] = { 8, 8, 4, 2 }; // be read - offsets and jumps...
int row, col, width, height, count, ext_code;
int row, col, width, height, ext_code;
bool terminated = false;
bool image_found = false;
do{
int error = DGifGetRecordType(in_file.get(), &record_type);
if(error == GIF_ERROR)
GifErrorHandler("DGifGetRecordType", error);
GifErrorHandler("DGifGetRecordType", in_file->Error);
switch(record_type) {
case IMAGE_DESC_RECORD_TYPE:
if (image_found){
// we already have found an image...
break;
}
error = DGifGetImageDesc(in_file.get());
if (error == GIF_ERROR) GifErrorHandler("DGifGetImageDesc", error);
if (error == GIF_ERROR) GifErrorHandler("DGifGetImageDesc", in_file->Error);
row = in_file->Image.Top; // Image Position relative to Screen.
col = in_file->Image.Left;
width = in_file->Image.Width;
......@@ -441,17 +437,16 @@ static void im_load_color(boost::shared_ptr<GifFileType> in_file, bob::io::base:
}
if(in_file->Image.Interlace) {
// Need to perform 4 passes on the images:
for(int i=count=0; i<4; ++i)
for(int i=0; i<4; ++i)
for(int j=row+InterlacedOffset[i]; j<row+height; j+=InterlacedJumps[i]) {
++count;
error = DGifGetLine(in_file.get(), &screen_buffer[j][col], width);
if(error == GIF_ERROR) GifErrorHandler("DGifGetLine", error);
if(error == GIF_ERROR) GifErrorHandler("DGifGetLine", in_file->Error);
}
}
else {
for(int i=0; i<height; ++i) {
error = DGifGetLine(in_file.get(), &screen_buffer[row++][col], width);
if(error == GIF_ERROR) GifErrorHandler("DGifGetLine", error);
if(error == GIF_ERROR) GifErrorHandler("DGifGetLine", in_file->Error);
}
}
image_found = true;
......@@ -459,10 +454,10 @@ static void im_load_color(boost::shared_ptr<GifFileType> in_file, bob::io::base:
case EXTENSION_RECORD_TYPE:
// Skip any extension blocks in file:
error = DGifGetExtension(in_file.get(), &ext_code, &extension);
if (error == GIF_ERROR) GifErrorHandler("DGifGetExtension", error);
if (error == GIF_ERROR) GifErrorHandler("DGifGetExtension", in_file->Error);
while(extension != NULL) {
error = DGifGetExtensionNext(in_file.get(), &extension);
if(error == GIF_ERROR) GifErrorHandler("DGifGetExtensionNext", error);
if(error == GIF_ERROR) GifErrorHandler("DGifGetExtensionNext", in_file->Error);
}
break;
case TERMINATE_RECORD_TYPE:
......@@ -567,15 +562,15 @@ static void im_save_color(const bob::io::base::array::interface& b, boost::share
error = EGifPutScreenDesc(out_file.get(), width, height, ExpNumOfColors, 0,
OutputColorMap);
if (error == GIF_ERROR) GifErrorHandler("EGifPutScreenDesc", error);
if (error == GIF_ERROR) GifErrorHandler("EGifPutScreenDesc", out_file->Error);
error = EGifPutImageDesc(out_file.get(), 0, 0, width, height, false, NULL);
if (error == GIF_ERROR) GifErrorHandler("EGifPutImageDesc", error);
if (error == GIF_ERROR) GifErrorHandler("EGifPutImageDesc", out_file->Error);
GifByteType *ptr = output_buffer.get();
for(int i=0; i<height; ++i) {
error = EGifPutLine(out_file.get(), ptr, width);
if (error == GIF_ERROR) GifErrorHandler("EGifPutImageDesc", error);
if (error == GIF_ERROR) GifErrorHandler("EGifPutImageDesc", out_file->Error);
ptr += width;
}
......
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