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Pillow/src/_webp.c

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#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include "Imaging.h"
#include <webp/encode.h>
#include <webp/decode.h>
#include <webp/types.h>
#ifdef HAVE_WEBPMUX
#include <webp/mux.h>
#include <webp/demux.h>
/*
* Check the versions from mux.h and demux.h, to ensure the WebPAnimEncoder and
* WebPAnimDecoder APIs are present (initial support was added in 0.5.0). The
* very early versions had some significant differences, so we require later
* versions, before enabling animation support.
*/
#if WEBP_MUX_ABI_VERSION >= 0x0104 && WEBP_DEMUX_ABI_VERSION >= 0x0105
#define HAVE_WEBPANIM
#endif
#endif
void ImagingSectionEnter(ImagingSectionCookie* cookie) {
*cookie = (PyThreadState *) PyEval_SaveThread();
}
void ImagingSectionLeave(ImagingSectionCookie* cookie) {
PyEval_RestoreThread((PyThreadState*) *cookie);
}
/* -------------------------------------------------------------------- */
/* WebP Muxer Error Handling */
/* -------------------------------------------------------------------- */
#ifdef HAVE_WEBPMUX
static const char* const kErrorMessages[-WEBP_MUX_NOT_ENOUGH_DATA + 1] = {
"WEBP_MUX_NOT_FOUND", "WEBP_MUX_INVALID_ARGUMENT", "WEBP_MUX_BAD_DATA",
"WEBP_MUX_MEMORY_ERROR", "WEBP_MUX_NOT_ENOUGH_DATA"
};
PyObject* HandleMuxError(WebPMuxError err, char* chunk) {
char message[100];
int message_len;
assert(err <= WEBP_MUX_NOT_FOUND && err >= WEBP_MUX_NOT_ENOUGH_DATA);
// Check for a memory error first
if (err == WEBP_MUX_MEMORY_ERROR) {
return PyErr_NoMemory();
}
// Create the error message
if (chunk == NULL) {
message_len = sprintf(message, "could not assemble chunks: %s", kErrorMessages[-err]);
} else {
message_len = sprintf(message, "could not set %.4s chunk: %s", chunk, kErrorMessages[-err]);
}
if (message_len < 0) {
PyErr_SetString(PyExc_RuntimeError, "failed to construct error message");
return NULL;
}
// Set the proper error type
switch (err) {
case WEBP_MUX_NOT_FOUND:
case WEBP_MUX_INVALID_ARGUMENT:
PyErr_SetString(PyExc_ValueError, message);
break;
case WEBP_MUX_BAD_DATA:
case WEBP_MUX_NOT_ENOUGH_DATA:
PyErr_SetString(PyExc_OSError, message);
break;
default:
PyErr_SetString(PyExc_RuntimeError, message);
break;
}
return NULL;
}
#endif
/* -------------------------------------------------------------------- */
/* WebP Animation Support */
/* -------------------------------------------------------------------- */
#ifdef HAVE_WEBPANIM
// Encoder type
typedef struct {
PyObject_HEAD
WebPAnimEncoder* enc;
WebPPicture frame;
} WebPAnimEncoderObject;
static PyTypeObject WebPAnimEncoder_Type;
// Decoder type
typedef struct {
PyObject_HEAD
WebPAnimDecoder* dec;
WebPAnimInfo info;
WebPData data;
char* mode;
} WebPAnimDecoderObject;
static PyTypeObject WebPAnimDecoder_Type;
// Encoder functions
PyObject* _anim_encoder_new(PyObject* self, PyObject* args)
{
int width, height;
uint32_t bgcolor;
int loop_count;
int minimize_size;
int kmin, kmax;
int allow_mixed;
int verbose;
WebPAnimEncoderOptions enc_options;
WebPAnimEncoderObject* encp = NULL;
WebPAnimEncoder* enc = NULL;
if (!PyArg_ParseTuple(args, "iiIiiiiii",
&width, &height, &bgcolor, &loop_count, &minimize_size,
&kmin, &kmax, &allow_mixed, &verbose)) {
return NULL;
}
// Setup and configure the encoder's options (these are animation-specific)
if (!WebPAnimEncoderOptionsInit(&enc_options)) {
PyErr_SetString(PyExc_RuntimeError, "failed to initialize encoder options");
return NULL;
}
enc_options.anim_params.bgcolor = bgcolor;
enc_options.anim_params.loop_count = loop_count;
enc_options.minimize_size = minimize_size;
enc_options.kmin = kmin;
enc_options.kmax = kmax;
enc_options.allow_mixed = allow_mixed;
enc_options.verbose = verbose;
// Validate canvas dimensions
if (width <= 0 || height <= 0) {
PyErr_SetString(PyExc_ValueError, "invalid canvas dimensions");
return NULL;
}
// Create a new animation encoder and picture frame
encp = PyObject_New(WebPAnimEncoderObject, &WebPAnimEncoder_Type);
if (encp) {
if (WebPPictureInit(&(encp->frame))) {
enc = WebPAnimEncoderNew(width, height, &enc_options);
if (enc) {
encp->enc = enc;
return (PyObject*) encp;
}
WebPPictureFree(&(encp->frame));
}
PyObject_Del(encp);
}
PyErr_SetString(PyExc_RuntimeError, "could not create encoder object");
return NULL;
}
PyObject* _anim_encoder_dealloc(PyObject* self)
{
WebPAnimEncoderObject* encp = (WebPAnimEncoderObject*)self;
WebPPictureFree(&(encp->frame));
WebPAnimEncoderDelete(encp->enc);
Py_RETURN_NONE;
}
PyObject* _anim_encoder_add(PyObject* self, PyObject* args)
{
uint8_t* rgb;
Py_ssize_t size;
int timestamp;
int width;
int height;
char* mode;
int lossless;
float quality_factor;
int method;
WebPConfig config;
WebPAnimEncoderObject* encp = (WebPAnimEncoderObject*)self;
WebPAnimEncoder* enc = encp->enc;
WebPPicture* frame = &(encp->frame);
if (!PyArg_ParseTuple(args, "z#iiisifi",
(char**)&rgb, &size, &timestamp, &width, &height, &mode,
&lossless, &quality_factor, &method)) {
return NULL;
}
// Check for NULL frame, which sets duration of final frame
if (!rgb) {
WebPAnimEncoderAdd(enc, NULL, timestamp, NULL);
Py_RETURN_NONE;
}
// Setup config for this frame
if (!WebPConfigInit(&config)) {
PyErr_SetString(PyExc_RuntimeError, "failed to initialize config!");
return NULL;
}
config.lossless = lossless;
config.quality = quality_factor;
config.method = method;
// Validate the config
if (!WebPValidateConfig(&config)) {
PyErr_SetString(PyExc_ValueError, "invalid configuration");
return NULL;
}
// Populate the frame with raw bytes passed to us
frame->width = width;
frame->height = height;
frame->use_argb = 1; // Don't convert RGB pixels to YUV
if (strcmp(mode, "RGBA")==0) {
WebPPictureImportRGBA(frame, rgb, 4 * width);
} else if (strcmp(mode, "RGBX")==0) {
WebPPictureImportRGBX(frame, rgb, 4 * width);
} else {
WebPPictureImportRGB(frame, rgb, 3 * width);
}
// Add the frame to the encoder
if (!WebPAnimEncoderAdd(enc, frame, timestamp, &config)) {
PyErr_SetString(PyExc_RuntimeError, WebPAnimEncoderGetError(enc));
return NULL;
}
Py_RETURN_NONE;
}
PyObject* _anim_encoder_assemble(PyObject* self, PyObject* args)
{
uint8_t* icc_bytes;
uint8_t* exif_bytes;
uint8_t* xmp_bytes;
Py_ssize_t icc_size;
Py_ssize_t exif_size;
Py_ssize_t xmp_size;
WebPData webp_data;
WebPAnimEncoderObject* encp = (WebPAnimEncoderObject*)self;
WebPAnimEncoder* enc = encp->enc;
WebPMux* mux = NULL;
PyObject* ret = NULL;
if (!PyArg_ParseTuple(args, "s#s#s#",
&icc_bytes, &icc_size, &exif_bytes, &exif_size, &xmp_bytes, &xmp_size)) {
return NULL;
}
// Init the output buffer
WebPDataInit(&webp_data);
// Assemble everything into the output buffer
if (!WebPAnimEncoderAssemble(enc, &webp_data)) {
PyErr_SetString(PyExc_RuntimeError, WebPAnimEncoderGetError(enc));
return NULL;
}
// Re-mux to add metadata as needed
if (icc_size > 0 || exif_size > 0 || xmp_size > 0) {
WebPMuxError err = WEBP_MUX_OK;
int i_icc_size = (int)icc_size;
int i_exif_size = (int)exif_size;
int i_xmp_size = (int)xmp_size;
WebPData icc_profile = { icc_bytes, i_icc_size };
WebPData exif = { exif_bytes, i_exif_size };
WebPData xmp = { xmp_bytes, i_xmp_size };
mux = WebPMuxCreate(&webp_data, 1);
if (mux == NULL) {
PyErr_SetString(PyExc_RuntimeError, "could not re-mux to add metadata");
return NULL;
}
WebPDataClear(&webp_data);
// Add ICCP chunk
if (i_icc_size > 0) {
err = WebPMuxSetChunk(mux, "ICCP", &icc_profile, 1);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, "ICCP");
}
}
// Add EXIF chunk
if (i_exif_size > 0) {
err = WebPMuxSetChunk(mux, "EXIF", &exif, 1);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, "EXIF");
}
}
// Add XMP chunk
if (i_xmp_size > 0) {
err = WebPMuxSetChunk(mux, "XMP ", &xmp, 1);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, "XMP");
}
}
err = WebPMuxAssemble(mux, &webp_data);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, NULL);
}
}
// Convert to Python bytes
ret = PyBytes_FromStringAndSize((char*)webp_data.bytes, webp_data.size);
WebPDataClear(&webp_data);
// If we had to re-mux, we should free it now that we're done with it
if (mux != NULL) {
WebPMuxDelete(mux);
}
return ret;
}
// Decoder functions
PyObject* _anim_decoder_new(PyObject* self, PyObject* args)
{
PyBytesObject *webp_string;
const uint8_t *webp;
Py_ssize_t size;
WebPData webp_src;
char* mode;
WebPDecoderConfig config;
WebPAnimDecoderObject* decp = NULL;
WebPAnimDecoder* dec = NULL;
if (!PyArg_ParseTuple(args, "S", &webp_string)) {
return NULL;
}
PyBytes_AsStringAndSize((PyObject *)webp_string, (char**)&webp, &size);
webp_src.bytes = webp;
webp_src.size = size;
// Sniff the mode, since the decoder API doesn't tell us
mode = "RGBA";
if (WebPGetFeatures(webp, size, &config.input) == VP8_STATUS_OK) {
if (!config.input.has_alpha) {
mode = "RGBX";
}
}
// Create the decoder (default mode is RGBA, if no options passed)
decp = PyObject_New(WebPAnimDecoderObject, &WebPAnimDecoder_Type);
if (decp) {
decp->mode = mode;
if (WebPDataCopy(&webp_src, &(decp->data))) {
dec = WebPAnimDecoderNew(&(decp->data), NULL);
if (dec) {
if (WebPAnimDecoderGetInfo(dec, &(decp->info))) {
decp->dec = dec;
return (PyObject*)decp;
}
}
}
PyObject_Del(decp);
}
PyErr_SetString(PyExc_RuntimeError, "could not create decoder object");
return NULL;
}
PyObject* _anim_decoder_dealloc(PyObject* self)
{
WebPAnimDecoderObject* decp = (WebPAnimDecoderObject *)self;
WebPDataClear(&(decp->data));
WebPAnimDecoderDelete(decp->dec);
Py_RETURN_NONE;
}
PyObject* _anim_decoder_get_info(PyObject* self)
{
WebPAnimDecoderObject* decp = (WebPAnimDecoderObject *)self;
WebPAnimInfo* info = &(decp->info);
return Py_BuildValue("IIIIIs",
info->canvas_width, info->canvas_height,
info->loop_count,
info->bgcolor,
info->frame_count,
decp->mode
);
}
PyObject* _anim_decoder_get_chunk(PyObject* self, PyObject* args)
{
char* mode;
WebPAnimDecoderObject* decp = (WebPAnimDecoderObject *)self;
const WebPDemuxer* demux;
WebPChunkIterator iter;
PyObject *ret;
if (!PyArg_ParseTuple(args, "s", &mode)) {
return NULL;
}
demux = WebPAnimDecoderGetDemuxer(decp->dec);
if (!WebPDemuxGetChunk(demux, mode, 1, &iter)) {
Py_RETURN_NONE;
}
ret = PyBytes_FromStringAndSize((const char*)iter.chunk.bytes, iter.chunk.size);
WebPDemuxReleaseChunkIterator(&iter);
return ret;
}
PyObject* _anim_decoder_get_next(PyObject* self)
{
uint8_t* buf;
int timestamp;
PyObject* bytes;
PyObject* ret;
WebPAnimDecoderObject* decp = (WebPAnimDecoderObject*)self;
if (!WebPAnimDecoderGetNext(decp->dec, &buf, &timestamp)) {
PyErr_SetString(PyExc_OSError, "failed to read next frame");
return NULL;
}
bytes = PyBytes_FromStringAndSize((char *)buf,
decp->info.canvas_width * 4 * decp->info.canvas_height);
ret = Py_BuildValue("Si", bytes, timestamp);
Py_DECREF(bytes);
return ret;
}
PyObject* _anim_decoder_reset(PyObject* self)
{
WebPAnimDecoderObject* decp = (WebPAnimDecoderObject *)self;
WebPAnimDecoderReset(decp->dec);
Py_RETURN_NONE;
}
/* -------------------------------------------------------------------- */
/* Type Definitions */
/* -------------------------------------------------------------------- */
// WebPAnimEncoder methods
static struct PyMethodDef _anim_encoder_methods[] = {
{"add", (PyCFunction)_anim_encoder_add, METH_VARARGS, "add"},
{"assemble", (PyCFunction)_anim_encoder_assemble, METH_VARARGS, "assemble"},
{NULL, NULL} /* sentinel */
};
// WebPAnimDecoder type definition
static PyTypeObject WebPAnimEncoder_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"WebPAnimEncoder", /*tp_name */
sizeof(WebPAnimEncoderObject), /*tp_size */
0, /*tp_itemsize */
/* methods */
(destructor)_anim_encoder_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number */
0, /*tp_as_sequence */
0, /*tp_as_mapping */
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
0, /*tp_doc*/
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
_anim_encoder_methods, /*tp_methods*/
0, /*tp_members*/
0, /*tp_getset*/
};
// WebPAnimDecoder methods
static struct PyMethodDef _anim_decoder_methods[] = {
{"get_info", (PyCFunction)_anim_decoder_get_info, METH_NOARGS, "get_info"},
{"get_chunk", (PyCFunction)_anim_decoder_get_chunk, METH_VARARGS, "get_chunk"},
{"get_next", (PyCFunction)_anim_decoder_get_next, METH_NOARGS, "get_next"},
{"reset", (PyCFunction)_anim_decoder_reset, METH_NOARGS, "reset"},
{NULL, NULL} /* sentinel */
};
// WebPAnimDecoder type definition
static PyTypeObject WebPAnimDecoder_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"WebPAnimDecoder", /*tp_name */
sizeof(WebPAnimDecoderObject), /*tp_size */
0, /*tp_itemsize */
/* methods */
(destructor)_anim_decoder_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number */
0, /*tp_as_sequence */
0, /*tp_as_mapping */
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
0, /*tp_doc*/
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
_anim_decoder_methods, /*tp_methods*/
0, /*tp_members*/
0, /*tp_getset*/
};
#endif
/* -------------------------------------------------------------------- */
/* Legacy WebP Support */
/* -------------------------------------------------------------------- */
PyObject* WebPEncode_wrapper(PyObject* self, PyObject* args)
{
int width;
int height;
int lossless;
float quality_factor;
int method;
uint8_t* rgb;
uint8_t* icc_bytes;
uint8_t* exif_bytes;
uint8_t* xmp_bytes;
uint8_t* output;
char* mode;
Py_ssize_t size;
Py_ssize_t icc_size;
Py_ssize_t exif_size;
Py_ssize_t xmp_size;
size_t ret_size;
int rgba_mode;
int channels;
int ok;
ImagingSectionCookie cookie;
WebPConfig config;
WebPMemoryWriter writer;
WebPPicture pic;
if (!PyArg_ParseTuple(args, "y#iiifss#is#s#",
(char**)&rgb, &size, &width, &height, &lossless, &quality_factor, &mode,
&icc_bytes, &icc_size, &method, &exif_bytes, &exif_size, &xmp_bytes, &xmp_size)) {
return NULL;
}
rgba_mode = strcmp(mode, "RGBA") == 0;
if (!rgba_mode && strcmp(mode, "RGB") != 0) {
Py_RETURN_NONE;
}
channels = rgba_mode ? 4 : 3;
if (size < width * height * channels) {
Py_RETURN_NONE;
}
// Setup config for this frame
if (!WebPConfigInit(&config)) {
PyErr_SetString(PyExc_RuntimeError, "failed to initialize config!");
return NULL;
}
config.lossless = lossless;
config.quality = quality_factor;
config.method = method;
// Validate the config
if (!WebPValidateConfig(&config)) {
PyErr_SetString(PyExc_ValueError, "invalid configuration");
return NULL;
}
if (!WebPPictureInit(&pic)) {
PyErr_SetString(PyExc_ValueError, "could not initialise picture");
return NULL;
}
pic.width = width;
pic.height = height;
pic.use_argb = 1; // Don't convert RGB pixels to YUV
if (rgba_mode) {
WebPPictureImportRGBA(&pic, rgb, channels * width);
} else {
WebPPictureImportRGB(&pic, rgb, channels * width);
}
WebPMemoryWriterInit(&writer);
pic.writer = WebPMemoryWrite;
pic.custom_ptr = &writer;
ImagingSectionEnter(&cookie);
ok = WebPEncode(&config, &pic);
ImagingSectionLeave(&cookie);
WebPPictureFree(&pic);
if (!ok) {
PyErr_SetString(PyExc_ValueError, "encoding error");
return NULL;
}
output = writer.mem;
ret_size = writer.size;
#ifndef HAVE_WEBPMUX
if (ret_size > 0) {
PyObject *ret = PyBytes_FromStringAndSize((char*)output, ret_size);
free(output);
return ret;
}
#else
{
/* I want to truncate the *_size items that get passed into WebP
data. Pypy2.1.0 had some issues where the Py_ssize_t items had
data in the upper byte. (Not sure why, it shouldn't have been there)
*/
int i_icc_size = (int)icc_size;
int i_exif_size = (int)exif_size;
int i_xmp_size = (int)xmp_size;
WebPData output_data = {0};
WebPData image = { output, ret_size };
WebPData icc_profile = { icc_bytes, i_icc_size };
WebPData exif = { exif_bytes, i_exif_size };
WebPData xmp = { xmp_bytes, i_xmp_size };
WebPMuxError err;
int dbg = 0;
int copy_data = 0; // value 1 indicates given data WILL be copied to the mux
// and value 0 indicates data will NOT be copied.
WebPMux* mux = WebPMuxNew();
WebPMuxSetImage(mux, &image, copy_data);
if (dbg) {
/* was getting %ld icc_size == 0, icc_size>0 was true */
fprintf(stderr, "icc size %d, %d \n", i_icc_size, i_icc_size > 0);
}
if (i_icc_size > 0) {
if (dbg) {
fprintf(stderr, "Adding ICC Profile\n");
}
err = WebPMuxSetChunk(mux, "ICCP", &icc_profile, copy_data);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, "ICCP");
}
}
if (dbg) {
fprintf(stderr, "exif size %d \n", i_exif_size);
}
if (i_exif_size > 0) {
if (dbg) {
fprintf(stderr, "Adding Exif Data\n");
}
err = WebPMuxSetChunk(mux, "EXIF", &exif, copy_data);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, "EXIF");
}
}
if (dbg) {
fprintf(stderr, "xmp size %d \n", i_xmp_size);
}
if (i_xmp_size > 0) {
if (dbg){
fprintf(stderr, "Adding XMP Data\n");
}
err = WebPMuxSetChunk(mux, "XMP ", &xmp, copy_data);
if (err != WEBP_MUX_OK) {
return HandleMuxError(err, "XMP ");
}
}
WebPMuxAssemble(mux, &output_data);
WebPMuxDelete(mux);
free(output);
ret_size = output_data.size;
if (ret_size > 0) {
PyObject *ret = PyBytes_FromStringAndSize((char*)output_data.bytes, ret_size);
WebPDataClear(&output_data);
return ret;
}
}
#endif
Py_RETURN_NONE;
}
PyObject* WebPDecode_wrapper(PyObject* self, PyObject* args)
{
PyBytesObject* webp_string;
const uint8_t* webp;
Py_ssize_t size;
PyObject *ret = Py_None, *bytes = NULL, *pymode = NULL, *icc_profile = NULL, *exif = NULL;
WebPDecoderConfig config;
VP8StatusCode vp8_status_code = VP8_STATUS_OK;
char* mode = "RGB";
if (!PyArg_ParseTuple(args, "S", &webp_string)) {
return NULL;
}
if (!WebPInitDecoderConfig(&config)) {
Py_RETURN_NONE;
}
PyBytes_AsStringAndSize((PyObject*) webp_string, (char**)&webp, &size);
vp8_status_code = WebPGetFeatures(webp, size, &config.input);
if (vp8_status_code == VP8_STATUS_OK) {
// If we don't set it, we don't get alpha.
// Initialized to MODE_RGB
if (config.input.has_alpha) {
config.output.colorspace = MODE_RGBA;
mode = "RGBA";
}
#ifndef HAVE_WEBPMUX
vp8_status_code = WebPDecode(webp, size, &config);
#else
{
int copy_data = 0;
WebPData data = { webp, size };
WebPMuxFrameInfo image;
WebPData icc_profile_data = {0};
WebPData exif_data = {0};
WebPMux* mux = WebPMuxCreate(&data, copy_data);
if (NULL == mux) {
goto end;
}
if (WEBP_MUX_OK != WebPMuxGetFrame(mux, 1, &image))
{
WebPMuxDelete(mux);
goto end;
}
webp = image.bitstream.bytes;
size = image.bitstream.size;
vp8_status_code = WebPDecode(webp, size, &config);
if (WEBP_MUX_OK == WebPMuxGetChunk(mux, "ICCP", &icc_profile_data)) {
icc_profile = PyBytes_FromStringAndSize((const char*)icc_profile_data.bytes, icc_profile_data.size);
}
if (WEBP_MUX_OK == WebPMuxGetChunk(mux, "EXIF", &exif_data)) {
exif = PyBytes_FromStringAndSize((const char*)exif_data.bytes, exif_data.size);
}
WebPDataClear(&image.bitstream);
WebPMuxDelete(mux);
}
#endif
}
if (vp8_status_code != VP8_STATUS_OK) {
goto end;
}
if (config.output.colorspace < MODE_YUV) {
bytes = PyBytes_FromStringAndSize((char*)config.output.u.RGBA.rgba,
config.output.u.RGBA.size);
} else {
// Skipping YUV for now. Need Test Images.
// UNDONE -- unclear if we'll ever get here if we set mode_rgb*
bytes = PyBytes_FromStringAndSize((char*)config.output.u.YUVA.y,
config.output.u.YUVA.y_size);
}
pymode = PyUnicode_FromString(mode);
ret = Py_BuildValue("SiiSSS", bytes, config.output.width,
config.output.height, pymode,
NULL == icc_profile ? Py_None : icc_profile,
NULL == exif ? Py_None : exif);
end:
WebPFreeDecBuffer(&config.output);
Py_XDECREF(bytes);
Py_XDECREF(pymode);
Py_XDECREF(icc_profile);
Py_XDECREF(exif);
if (Py_None == ret) {
Py_RETURN_NONE;
}
return ret;
}
// Return the decoder's version number, packed in hexadecimal using 8bits for
// each of major/minor/revision. E.g: v2.5.7 is 0x020507.
PyObject* WebPDecoderVersion_wrapper() {
return Py_BuildValue("i", WebPGetDecoderVersion());
}
// Version as string
const char*
WebPDecoderVersion_str(void)
{
static char version[20];
int version_number = WebPGetDecoderVersion();
sprintf(version, "%d.%d.%d", version_number >> 16, (version_number >> 8) % 0x100, version_number % 0x100);
return version;
}
/*
* The version of webp that ships with (0.1.3) Ubuntu 12.04 doesn't handle alpha well.
* Files that are valid with 0.3 are reported as being invalid.
*/
int WebPDecoderBuggyAlpha(void) {
return WebPGetDecoderVersion()==0x0103;
}
PyObject* WebPDecoderBuggyAlpha_wrapper() {
return Py_BuildValue("i", WebPDecoderBuggyAlpha());
}
/* -------------------------------------------------------------------- */
/* Module Setup */
/* -------------------------------------------------------------------- */
static PyMethodDef webpMethods[] =
{
#ifdef HAVE_WEBPANIM
{"WebPAnimDecoder", _anim_decoder_new, METH_VARARGS, "WebPAnimDecoder"},
{"WebPAnimEncoder", _anim_encoder_new, METH_VARARGS, "WebPAnimEncoder"},
#endif
{"WebPEncode", WebPEncode_wrapper, METH_VARARGS, "WebPEncode"},
{"WebPDecode", WebPDecode_wrapper, METH_VARARGS, "WebPDecode"},
{"WebPDecoderVersion", WebPDecoderVersion_wrapper, METH_NOARGS, "WebPVersion"},
{"WebPDecoderBuggyAlpha", WebPDecoderBuggyAlpha_wrapper, METH_NOARGS, "WebPDecoderBuggyAlpha"},
{NULL, NULL}
};
void addMuxFlagToModule(PyObject* m) {
#ifdef HAVE_WEBPMUX
PyModule_AddObject(m, "HAVE_WEBPMUX", Py_True);
#else
PyModule_AddObject(m, "HAVE_WEBPMUX", Py_False);
#endif
}
void addAnimFlagToModule(PyObject* m) {
#ifdef HAVE_WEBPANIM
PyModule_AddObject(m, "HAVE_WEBPANIM", Py_True);
#else
PyModule_AddObject(m, "HAVE_WEBPANIM", Py_False);
#endif
}
void addTransparencyFlagToModule(PyObject* m) {
PyModule_AddObject(m, "HAVE_TRANSPARENCY",
PyBool_FromLong(!WebPDecoderBuggyAlpha()));
}
static int setup_module(PyObject* m) {
PyObject* d = PyModule_GetDict(m);
addMuxFlagToModule(m);
addAnimFlagToModule(m);
addTransparencyFlagToModule(m);
PyDict_SetItemString(d, "webpdecoder_version", PyUnicode_FromString(WebPDecoderVersion_str()));
#ifdef HAVE_WEBPANIM
/* Ready object types */
if (PyType_Ready(&WebPAnimDecoder_Type) < 0 ||
PyType_Ready(&WebPAnimEncoder_Type) < 0) {
return -1;
}
#endif
return 0;
}
PyMODINIT_FUNC
PyInit__webp(void) {
PyObject* m;
static PyModuleDef module_def = {
PyModuleDef_HEAD_INIT,
"_webp", /* m_name */
NULL, /* m_doc */
-1, /* m_size */
webpMethods, /* m_methods */
};
m = PyModule_Create(&module_def);
if (setup_module(m) < 0) {
return NULL;
}
return m;
}
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