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#include "loader_common.h"
#include <gif_lib.h>
int
load2(ImlibImage * im, int load_data)
{
static const int intoffset[] = { 0, 4, 2, 1 };
static const int intjump[] = { 8, 8, 4, 2 };
int rc;
DATA32 *ptr;
GifFileType *gif;
GifRowType *rows;
GifRecordType rec;
ColorMapObject *cmap;
int i, j, done, bg, r, g, b, w = 0, h = 0;
int transp;
int fd;
DATA32 colormap[256];
fd = dup(fileno(im->fp));
#if GIFLIB_MAJOR >= 5
gif = DGifOpenFileHandle(fd, NULL);
#else
gif = DGifOpenFileHandle(fd);
#endif
if (!gif)
return LOAD_FAIL;
rc = LOAD_FAIL;
done = 0;
rows = NULL;
transp = -1;
do
{
if (DGifGetRecordType(gif, &rec) == GIF_ERROR)
{
/* PrintGifError(); */
rec = TERMINATE_RECORD_TYPE;
}
if ((rec == IMAGE_DESC_RECORD_TYPE) && (!done))
{
if (DGifGetImageDesc(gif) == GIF_ERROR)
{
/* PrintGifError(); */
rec = TERMINATE_RECORD_TYPE;
break;
}
im->w = w = gif->Image.Width;
im->h = h = gif->Image.Height;
if (!IMAGE_DIMENSIONS_OK(w, h))
goto quit;
rows = calloc(h, sizeof(GifRowType));
if (!rows)
goto quit;
for (i = 0; i < h; i++)
{
rows[i] = calloc(w, sizeof(GifPixelType));
if (!rows[i])
goto quit;
}
if (gif->Image.Interlace)
{
for (i = 0; i < 4; i++)
{
for (j = intoffset[i]; j < h; j += intjump[i])
{
DGifGetLine(gif, rows[j], w);
}
}
}
else
{
for (i = 0; i < h; i++)
{
DGifGetLine(gif, rows[i], w);
}
}
done = 1;
}
else if (rec == EXTENSION_RECORD_TYPE)
{
int ext_code;
GifByteType *ext;
ext = NULL;
DGifGetExtension(gif, &ext_code, &ext);
while (ext)
{
if ((ext_code == 0xf9) && (ext[1] & 1) && (transp < 0))
{
transp = (int)ext[4];
}
ext = NULL;
DGifGetExtensionNext(gif, &ext);
}
}
}
while (rec != TERMINATE_RECORD_TYPE);
UPDATE_FLAG(im->flags, F_HAS_ALPHA, transp >= 0);
if (!rows)
goto quit;
if (!load_data)
{
rc = LOAD_SUCCESS;
goto quit;
}
/* Load data */
bg = gif->SBackGroundColor;
cmap = (gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap);
memset(colormap, 0, sizeof(colormap));
if (cmap != NULL)
{
for (i = cmap->ColorCount > 256 ? 256 : cmap->ColorCount; i-- > 0;)
{
r = cmap->Colors[i].Red;
g = cmap->Colors[i].Green;
b = cmap->Colors[i].Blue;
colormap[i] = PIXEL_ARGB(0xff, r, g, b);
}
/* if bg > cmap->ColorCount, it is transparent black already */
if (transp >= 0 && transp < 256)
colormap[transp] = bg >= 0 && bg < 256 ?
colormap[bg] & 0x00ffffff : 0x00000000;
}
ptr = __imlib_AllocateData(im);
if (!ptr)
goto quit;
for (i = 0; i < h; i++)
{
for (j = 0; j < w; j++)
{
*ptr++ = colormap[rows[i][j]];
}
if (im->lc && __imlib_LoadProgressRows(im, i, 1))
{
rc = LOAD_BREAK;
goto quit;
}
}
rc = LOAD_SUCCESS;
quit:
if (rows)
{
for (i = 0; i < h; i++)
free(rows[i]);
free(rows);
}
#if GIFLIB_MAJOR > 5 || (GIFLIB_MAJOR == 5 && GIFLIB_MINOR >= 1)
DGifCloseFile(gif, NULL);
#else
DGifCloseFile(gif);
#endif
if (rc <= 0)
__imlib_FreeData(im);
return rc;
}
void
formats(ImlibLoader * l)
{
static const char *const list_formats[] = { "gif" };
__imlib_LoaderSetFormats(l, list_formats, ARRAY_SIZE(list_formats));
}
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