mirror of
https://github.com/python-pillow/Pillow.git
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9519013466
This updates several Python type definitions and uses to bring us closer to Python 3 compatibility. This includes: * Replacing staticforward and statichere with static. These were a hack for old compilers and are not supported/needed anymore. * Using Py_TYPE() instead of ob_type; ob_type is hidden in Py3. * Replacing getattr with getters/setters. getattr is sort-of supported in Py3, but Py_FindMethod is not. So we just use the newer methods/getsetters mechanisms and start using PyType_Ready everywhere. * Use PyVarObject_HEAD_INIT for types, since types are PyVarObject. * Use PyMODINIT_FUNC for module initialization functions. There are some tab/space issues in this commit. I'm set for spaces; the source is a little schizo.
703 lines
17 KiB
C
703 lines
17 KiB
C
/*
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* The Python Imaging Library.
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*
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* standard decoder interfaces for the Imaging library
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*
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* history:
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* 1996-03-28 fl Moved from _imagingmodule.c
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* 1996-04-15 fl Support subregions in setimage
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* 1996-04-19 fl Allocate decoder buffer (where appropriate)
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* 1996-05-02 fl Added jpeg decoder
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* 1996-05-12 fl Compile cleanly as C++
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* 1996-05-16 fl Added hex decoder
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* 1996-05-26 fl Added jpeg configuration parameters
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* 1996-12-14 fl Added zip decoder
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* 1996-12-30 fl Plugged potential memory leak for tiled images
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* 1997-01-03 fl Added fli and msp decoders
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* 1997-01-04 fl Added sun_rle and tga_rle decoders
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* 1997-05-31 fl Added bitfield decoder
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* 1998-09-11 fl Added orientation and pixelsize fields to tga_rle decoder
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* 1998-12-29 fl Added mode/rawmode argument to decoders
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* 1998-12-30 fl Added mode argument to *all* decoders
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* 2002-06-09 fl Added stride argument to pcx decoder
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*
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* Copyright (c) 1997-2002 by Secret Labs AB.
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* Copyright (c) 1995-2002 by Fredrik Lundh.
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*
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* See the README file for information on usage and redistribution.
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*/
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/* FIXME: make these pluggable! */
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#include "Python.h"
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#if PY_VERSION_HEX < 0x01060000
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#define PyObject_New PyObject_NEW
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#define PyObject_Del PyMem_DEL
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#endif
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#include "Imaging.h"
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#include "Gif.h"
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#include "Lzw.h"
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#include "Raw.h"
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#include "Bit.h"
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/* -------------------------------------------------------------------- */
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/* Common */
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/* -------------------------------------------------------------------- */
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typedef struct {
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PyObject_HEAD
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int (*decode)(Imaging im, ImagingCodecState state,
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UINT8* buffer, int bytes);
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struct ImagingCodecStateInstance state;
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Imaging im;
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PyObject* lock;
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} ImagingDecoderObject;
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static PyTypeObject ImagingDecoderType;
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static ImagingDecoderObject*
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PyImaging_DecoderNew(int contextsize)
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{
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ImagingDecoderObject *decoder;
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void *context;
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if(PyType_Ready(&ImagingDecoderType) < 0)
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return NULL;
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decoder = PyObject_New(ImagingDecoderObject, &ImagingDecoderType);
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if (decoder == NULL)
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return NULL;
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/* Clear the decoder state */
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memset(&decoder->state, 0, sizeof(decoder->state));
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/* Allocate decoder context */
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if (contextsize > 0) {
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context = (void*) calloc(1, contextsize);
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if (!context) {
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Py_DECREF(decoder);
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(void) PyErr_NoMemory();
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return NULL;
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}
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} else
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context = 0;
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/* Initialize decoder context */
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decoder->state.context = context;
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/* Target image */
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decoder->lock = NULL;
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decoder->im = NULL;
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return decoder;
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}
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static void
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_dealloc(ImagingDecoderObject* decoder)
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{
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free(decoder->state.buffer);
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free(decoder->state.context);
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Py_XDECREF(decoder->lock);
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PyObject_Del(decoder);
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}
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static PyObject*
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_decode(ImagingDecoderObject* decoder, PyObject* args)
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{
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UINT8* buffer;
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int bufsize, status;
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if (!PyArg_ParseTuple(args, "s#", &buffer, &bufsize))
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return NULL;
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status = decoder->decode(decoder->im, &decoder->state, buffer, bufsize);
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return Py_BuildValue("ii", status, decoder->state.errcode);
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}
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extern Imaging PyImaging_AsImaging(PyObject *op);
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static PyObject*
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_setimage(ImagingDecoderObject* decoder, PyObject* args)
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{
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PyObject* op;
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Imaging im;
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ImagingCodecState state;
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int x0, y0, x1, y1;
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x0 = y0 = x1 = y1 = 0;
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/* FIXME: should publish the ImagingType descriptor */
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if (!PyArg_ParseTuple(args, "O|(iiii)", &op, &x0, &y0, &x1, &y1))
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return NULL;
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im = PyImaging_AsImaging(op);
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if (!im)
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return NULL;
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decoder->im = im;
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state = &decoder->state;
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/* Setup decoding tile extent */
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if (x0 == 0 && x1 == 0) {
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state->xsize = im->xsize;
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state->ysize = im->ysize;
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} else {
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state->xoff = x0;
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state->yoff = y0;
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state->xsize = x1 - x0;
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state->ysize = y1 - y0;
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}
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if (state->xsize <= 0 ||
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state->xsize + state->xoff > (int) im->xsize ||
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state->ysize <= 0 ||
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state->ysize + state->yoff > (int) im->ysize) {
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PyErr_SetString(PyExc_ValueError, "tile cannot extend outside image");
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return NULL;
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}
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/* Allocate memory buffer (if bits field is set) */
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if (state->bits > 0) {
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if (!state->bytes)
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state->bytes = (state->bits * state->xsize+7)/8;
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state->buffer = (UINT8*) malloc(state->bytes);
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if (!state->buffer)
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return PyErr_NoMemory();
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}
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/* Keep a reference to the image object, to make sure it doesn't
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go away before we do */
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Py_INCREF(op);
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Py_XDECREF(decoder->lock);
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decoder->lock = op;
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Py_INCREF(Py_None);
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return Py_None;
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}
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static struct PyMethodDef methods[] = {
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{"decode", (PyCFunction)_decode, 1},
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{"setimage", (PyCFunction)_setimage, 1},
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{NULL, NULL} /* sentinel */
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};
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static PyTypeObject ImagingDecoderType = {
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PyVarObject_HEAD_INIT(NULL, 0)
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"ImagingDecoder", /*tp_name*/
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sizeof(ImagingDecoderObject), /*tp_size*/
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0, /*tp_itemsize*/
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/* methods */
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(destructor)_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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0, /*tp_getattr*/
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0, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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0, /*tp_as_number */
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0, /*tp_as_sequence */
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0, /*tp_as_mapping */
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0, /*tp_hash*/
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0, /*tp_call*/
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0, /*tp_str*/
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0, /*tp_getattro*/
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0, /*tp_setattro*/
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0, /*tp_as_buffer*/
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Py_TPFLAGS_DEFAULT, /*tp_flags*/
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0, /*tp_doc*/
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0, /*tp_traverse*/
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0, /*tp_clear*/
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0, /*tp_richcompare*/
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0, /*tp_weaklistoffset*/
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0, /*tp_iter*/
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0, /*tp_iternext*/
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methods, /*tp_methods*/
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0, /*tp_members*/
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0, /*tp_getset*/
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};
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/* -------------------------------------------------------------------- */
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int
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get_unpacker(ImagingDecoderObject* decoder, const char* mode,
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const char* rawmode)
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{
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int bits;
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ImagingShuffler unpack;
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unpack = ImagingFindUnpacker(mode, rawmode, &bits);
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if (!unpack) {
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Py_DECREF(decoder);
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PyErr_SetString(PyExc_ValueError, "unknown raw mode");
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return -1;
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}
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decoder->state.shuffle = unpack;
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decoder->state.bits = bits;
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return 0;
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}
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/* -------------------------------------------------------------------- */
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/* BIT (packed fields) */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_BitDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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int bits = 8;
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int pad = 8;
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int fill = 0;
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int sign = 0;
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int ystep = 1;
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if (!PyArg_ParseTuple(args, "s|iiiii", &mode, &bits, &pad, &fill,
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&sign, &ystep))
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return NULL;
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if (strcmp(mode, "F") != 0) {
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PyErr_SetString(PyExc_ValueError, "bad image mode");
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return NULL;
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}
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decoder = PyImaging_DecoderNew(sizeof(BITSTATE));
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if (decoder == NULL)
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return NULL;
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decoder->decode = ImagingBitDecode;
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decoder->state.ystep = ystep;
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((BITSTATE*)decoder->state.context)->bits = bits;
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((BITSTATE*)decoder->state.context)->pad = pad;
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((BITSTATE*)decoder->state.context)->fill = fill;
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((BITSTATE*)decoder->state.context)->sign = sign;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* FLI */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_FliDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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decoder->decode = ImagingFliDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* GIF */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_GifDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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int bits = 8;
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int interlace = 0;
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if (!PyArg_ParseTuple(args, "s|ii", &mode, &bits, &interlace))
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return NULL;
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if (strcmp(mode, "L") != 0 && strcmp(mode, "P") != 0) {
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PyErr_SetString(PyExc_ValueError, "bad image mode");
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return NULL;
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}
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decoder = PyImaging_DecoderNew(sizeof(GIFDECODERSTATE));
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if (decoder == NULL)
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return NULL;
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decoder->decode = ImagingGifDecode;
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((GIFDECODERSTATE*)decoder->state.context)->bits = bits;
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((GIFDECODERSTATE*)decoder->state.context)->interlace = interlace;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* HEX */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_HexDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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if (!PyArg_ParseTuple(args, "ss", &mode, &rawmode))
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return NULL;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->decode = ImagingHexDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* LZW */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_TiffLzwDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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int filter = 0;
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if (!PyArg_ParseTuple(args, "ss|i", &mode, &rawmode, &filter))
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return NULL;
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decoder = PyImaging_DecoderNew(sizeof(LZWSTATE));
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->decode = ImagingLzwDecode;
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((LZWSTATE*)decoder->state.context)->filter = filter;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* MSP */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_MspDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, "1", "1") < 0)
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return NULL;
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decoder->decode = ImagingMspDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* PackBits */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_PackbitsDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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if (!PyArg_ParseTuple(args, "ss", &mode, &rawmode))
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return NULL;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->decode = ImagingPackbitsDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* PCD */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_PcdDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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/* Unpack from PhotoYCC to RGB */
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if (get_unpacker(decoder, "RGB", "YCC;P") < 0)
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return NULL;
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decoder->decode = ImagingPcdDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* PCX */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_PcxDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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int stride;
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if (!PyArg_ParseTuple(args, "ssi", &mode, &rawmode, &stride))
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return NULL;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->state.bytes = stride;
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decoder->decode = ImagingPcxDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* RAW */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_RawDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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int stride = 0;
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int ystep = 1;
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if (!PyArg_ParseTuple(args, "ss|ii", &mode, &rawmode, &stride, &ystep))
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return NULL;
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decoder = PyImaging_DecoderNew(sizeof(RAWSTATE));
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->decode = ImagingRawDecode;
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decoder->state.ystep = ystep;
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((RAWSTATE*)decoder->state.context)->stride = stride;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* SUN RLE */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_SunRleDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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if (!PyArg_ParseTuple(args, "ss", &mode, &rawmode))
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return NULL;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->decode = ImagingSunRleDecode;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* TGA RLE */
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/* -------------------------------------------------------------------- */
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PyObject*
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PyImaging_TgaRleDecoderNew(PyObject* self, PyObject* args)
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{
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ImagingDecoderObject* decoder;
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char* mode;
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char* rawmode;
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int ystep = 1;
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int depth = 8;
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if (!PyArg_ParseTuple(args, "ss|ii", &mode, &rawmode, &ystep, &depth))
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return NULL;
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decoder = PyImaging_DecoderNew(0);
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if (decoder == NULL)
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return NULL;
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if (get_unpacker(decoder, mode, rawmode) < 0)
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return NULL;
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decoder->decode = ImagingTgaRleDecode;
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decoder->state.ystep = ystep;
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decoder->state.count = depth / 8;
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return (PyObject*) decoder;
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}
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/* -------------------------------------------------------------------- */
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/* XBM */
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
PyObject*
|
|
PyImaging_XbmDecoderNew(PyObject* self, PyObject* args)
|
|
{
|
|
ImagingDecoderObject* decoder;
|
|
|
|
decoder = PyImaging_DecoderNew(0);
|
|
if (decoder == NULL)
|
|
return NULL;
|
|
|
|
if (get_unpacker(decoder, "1", "1;R") < 0)
|
|
return NULL;
|
|
|
|
decoder->decode = ImagingXbmDecode;
|
|
|
|
return (PyObject*) decoder;
|
|
}
|
|
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* ZIP */
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
#ifdef HAVE_LIBZ
|
|
|
|
#include "Zip.h"
|
|
|
|
PyObject*
|
|
PyImaging_ZipDecoderNew(PyObject* self, PyObject* args)
|
|
{
|
|
ImagingDecoderObject* decoder;
|
|
|
|
char* mode;
|
|
char* rawmode;
|
|
int interlaced = 0;
|
|
if (!PyArg_ParseTuple(args, "ss|i", &mode, &rawmode, &interlaced))
|
|
return NULL;
|
|
|
|
decoder = PyImaging_DecoderNew(sizeof(ZIPSTATE));
|
|
if (decoder == NULL)
|
|
return NULL;
|
|
|
|
if (get_unpacker(decoder, mode, rawmode) < 0)
|
|
return NULL;
|
|
|
|
decoder->decode = ImagingZipDecode;
|
|
|
|
((ZIPSTATE*)decoder->state.context)->interlaced = interlaced;
|
|
|
|
return (PyObject*) decoder;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* JPEG */
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
#ifdef HAVE_LIBJPEG
|
|
|
|
/* We better define this decoder last in this file, so the following
|
|
undef's won't mess things up for the Imaging library proper. */
|
|
|
|
#undef HAVE_PROTOTYPES
|
|
#undef HAVE_STDDEF_H
|
|
#undef HAVE_STDLIB_H
|
|
#undef UINT8
|
|
#undef UINT16
|
|
#undef UINT32
|
|
#undef INT8
|
|
#undef INT16
|
|
#undef INT32
|
|
|
|
#include "Jpeg.h"
|
|
|
|
PyObject*
|
|
PyImaging_JpegDecoderNew(PyObject* self, PyObject* args)
|
|
{
|
|
ImagingDecoderObject* decoder;
|
|
|
|
char* mode;
|
|
char* rawmode; /* what we wan't from the decoder */
|
|
char* jpegmode; /* what's in the file */
|
|
int scale = 1;
|
|
int draft = 0;
|
|
if (!PyArg_ParseTuple(args, "ssz|ii", &mode, &rawmode, &jpegmode,
|
|
&scale, &draft))
|
|
return NULL;
|
|
|
|
if (!jpegmode)
|
|
jpegmode = "";
|
|
|
|
decoder = PyImaging_DecoderNew(sizeof(JPEGSTATE));
|
|
if (decoder == NULL)
|
|
return NULL;
|
|
|
|
if (get_unpacker(decoder, mode, rawmode) < 0)
|
|
return NULL;
|
|
|
|
decoder->decode = ImagingJpegDecode;
|
|
|
|
strncpy(((JPEGSTATE*)decoder->state.context)->rawmode, rawmode, 8);
|
|
strncpy(((JPEGSTATE*)decoder->state.context)->jpegmode, jpegmode, 8);
|
|
|
|
((JPEGSTATE*)decoder->state.context)->scale = scale;
|
|
((JPEGSTATE*)decoder->state.context)->draft = draft;
|
|
|
|
return (PyObject*) decoder;
|
|
}
|
|
#endif
|