Imaging
ImagingNewInternal(const char* mode, int xsize, int ysize, int dirty)
{
Imaging im;
if (xsize < 0 || ysize < 0) {
return (Imaging) ImagingError_ValueError("bad image size");
}
im = ImagingNewPrologue(mode, xsize, ysize);
if ( ! im)
return NULL;
if (ImagingAllocateArray(im, dirty, ImagingDefaultArena.block_size)) {
return im;
}
ImagingError_Clear();
// Try to allocate the image once more with smallest possible block size
if (ImagingAllocateArray(im, dirty, IMAGING_PAGE_SIZE)) {
return im;
}
ImagingDelete(im);
return NULL;
}
static PyObject*
mapping_readimage(ImagingMapperObject* mapper, PyObject* args)
{
int y, size;
Imaging im;
char* mode;
int xsize;
int ysize;
int stride;
int orientation;
if (!PyArg_ParseTuple(args, "s(ii)ii", &mode, &xsize, &ysize,
&stride, &orientation))
return NULL;
if (stride <= 0) {
/* FIXME: maybe we should call ImagingNewPrologue instead */
if (!strcmp(mode, "L") || !strcmp(mode, "P"))
stride = xsize;
else if (!strcmp(mode, "I;16") || !strcmp(mode, "I;16B"))
stride = xsize * 2;
else
stride = xsize * 4;
}
size = ysize * stride;
if (mapper->offset + size > mapper->size) {
PyErr_SetString(PyExc_IOError, "image file truncated");
return NULL;
}
im = ImagingNewPrologue(mode, xsize, ysize);
if (!im)
return NULL;
/* setup file pointers */
if (orientation > 0)
for (y = 0; y < ysize; y++)
im->image[y] = mapper->base + mapper->offset + y * stride;
else
for (y = 0; y < ysize; y++)
im->image[ysize-y-1] = mapper->base + mapper->offset + y * stride;
im->destroy = ImagingDestroyMap;
if (!ImagingNewEpilogue(im))
return NULL;
mapper->offset += size;
return PyImagingNew(im);
}
Imaging
ImagingNewBlock(const char* mode, int xsize, int ysize)
{
Imaging im;
if (xsize < 0 || ysize < 0) {
return (Imaging) ImagingError_ValueError("bad image size");
}
im = ImagingNewPrologue(mode, xsize, ysize);
if ( ! im)
return NULL;
if (ImagingAllocateBlock(im)) {
return im;
}
ImagingDelete(im);
return NULL;
}
