mirror of
https://github.com/python-pillow/Pillow.git
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308 lines
8.8 KiB
C
308 lines
8.8 KiB
C
#define PY_SSIZE_T_CLEAN
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#include <Python.h>
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#include "Imaging.h"
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#include "py3.h"
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#include <webp/encode.h>
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#include <webp/decode.h>
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#include <webp/types.h>
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#ifdef HAVE_WEBPMUX
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#include <webp/mux.h>
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#endif
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PyObject* WebPEncode_wrapper(PyObject* self, PyObject* args)
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{
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int width;
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int height;
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int lossless;
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float quality_factor;
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uint8_t *rgb;
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uint8_t *icc_bytes;
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uint8_t *exif_bytes;
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uint8_t *output;
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char *mode;
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Py_ssize_t size;
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Py_ssize_t icc_size;
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Py_ssize_t exif_size;
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size_t ret_size;
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if (!PyArg_ParseTuple(args, PY_ARG_BYTES_LENGTH"iiifss#s#",
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(char**)&rgb, &size, &width, &height, &lossless, &quality_factor, &mode,
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&icc_bytes, &icc_size, &exif_bytes, &exif_size)) {
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return NULL;
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}
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if (strcmp(mode, "RGBA")==0){
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if (size < width * height * 4){
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Py_RETURN_NONE;
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}
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#if WEBP_ENCODER_ABI_VERSION >= 0x0100
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if (lossless) {
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ret_size = WebPEncodeLosslessRGBA(rgb, width, height, 4* width, &output);
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} else
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#endif
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{
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ret_size = WebPEncodeRGBA(rgb, width, height, 4* width, quality_factor, &output);
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}
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} else if (strcmp(mode, "RGB")==0){
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if (size < width * height * 3){
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Py_RETURN_NONE;
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}
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#if WEBP_ENCODER_ABI_VERSION >= 0x0100
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if (lossless) {
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ret_size = WebPEncodeLosslessRGB(rgb, width, height, 3* width, &output);
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} else
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#endif
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{
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ret_size = WebPEncodeRGB(rgb, width, height, 3* width, quality_factor, &output);
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}
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} else {
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Py_RETURN_NONE;
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}
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#ifndef HAVE_WEBPMUX
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if (ret_size > 0) {
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PyObject *ret = PyBytes_FromStringAndSize((char*)output, ret_size);
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free(output);
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return ret;
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}
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#else
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{
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/* I want to truncate the *_size items that get passed into webp
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data. Pypy2.1.0 had some issues where the Py_ssize_t items had
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data in the upper byte. (Not sure why, it shouldn't have been there)
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*/
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int i_icc_size = (int)icc_size;
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int i_exif_size = (int)exif_size;
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WebPData output_data = {0};
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WebPData image = { output, ret_size };
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WebPData icc_profile = { icc_bytes, i_icc_size };
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WebPData exif = { exif_bytes, i_exif_size };
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WebPMuxError err;
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int dbg = 0;
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int copy_data = 0; // value 1 indicates given data WILL be copied to the mux
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// and value 0 indicates data will NOT be copied.
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WebPMux* mux = WebPMuxNew();
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WebPMuxSetImage(mux, &image, copy_data);
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if (dbg) {
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/* was getting %ld icc_size == 0, icc_size>0 was true */
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fprintf(stderr, "icc size %d, %d \n", i_icc_size, i_icc_size > 0);
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}
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if (i_icc_size > 0) {
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if (dbg) {
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fprintf (stderr, "Adding ICC Profile\n");
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}
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err = WebPMuxSetChunk(mux, "ICCP", &icc_profile, copy_data);
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if (dbg && err == WEBP_MUX_INVALID_ARGUMENT) {
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fprintf(stderr, "Invalid ICC Argument\n");
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} else if (dbg && err == WEBP_MUX_MEMORY_ERROR) {
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fprintf(stderr, "ICC Memory Error\n");
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}
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}
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if (dbg) {
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fprintf(stderr, "exif size %d \n", i_exif_size);
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}
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if (i_exif_size > 0) {
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if (dbg){
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fprintf (stderr, "Adding Exif Data\n");
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}
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err = WebPMuxSetChunk(mux, "EXIF", &exif, copy_data);
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if (dbg && err == WEBP_MUX_INVALID_ARGUMENT) {
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fprintf(stderr, "Invalid Exif Argument\n");
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} else if (dbg && err == WEBP_MUX_MEMORY_ERROR) {
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fprintf(stderr, "Exif Memory Error\n");
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}
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}
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WebPMuxAssemble(mux, &output_data);
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WebPMuxDelete(mux);
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free(output);
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ret_size = output_data.size;
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if (ret_size > 0) {
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PyObject *ret = PyBytes_FromStringAndSize((char*)output_data.bytes, ret_size);
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WebPDataClear(&output_data);
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return ret;
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}
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}
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#endif
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Py_RETURN_NONE;
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}
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PyObject* WebPDecode_wrapper(PyObject* self, PyObject* args)
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{
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PyBytesObject *webp_string;
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const uint8_t *webp;
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Py_ssize_t size;
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PyObject *ret = Py_None, *bytes = NULL, *pymode = NULL, *icc_profile = NULL, *exif = NULL;
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WebPDecoderConfig config;
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VP8StatusCode vp8_status_code = VP8_STATUS_OK;
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char* mode = "RGB";
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if (!PyArg_ParseTuple(args, "S", &webp_string)) {
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return NULL;
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}
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if (!WebPInitDecoderConfig(&config)) {
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Py_RETURN_NONE;
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}
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PyBytes_AsStringAndSize((PyObject *) webp_string, (char**)&webp, &size);
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vp8_status_code = WebPGetFeatures(webp, size, &config.input);
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if (vp8_status_code == VP8_STATUS_OK) {
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// If we don't set it, we don't get alpha.
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// Initialized to MODE_RGB
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if (config.input.has_alpha) {
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config.output.colorspace = MODE_RGBA;
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mode = "RGBA";
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}
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#ifndef HAVE_WEBPMUX
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vp8_status_code = WebPDecode(webp, size, &config);
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#else
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{
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int copy_data = 0;
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WebPData data = { webp, size };
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WebPMuxFrameInfo image;
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WebPData icc_profile_data = {0};
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WebPData exif_data = {0};
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WebPMux* mux = WebPMuxCreate(&data, copy_data);
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if (NULL == mux)
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goto end;
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if (WEBP_MUX_OK != WebPMuxGetFrame(mux, 1, &image))
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{
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WebPMuxDelete(mux);
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goto end;
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}
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webp = image.bitstream.bytes;
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size = image.bitstream.size;
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vp8_status_code = WebPDecode(webp, size, &config);
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if (WEBP_MUX_OK == WebPMuxGetChunk(mux, "ICCP", &icc_profile_data))
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icc_profile = PyBytes_FromStringAndSize((const char*)icc_profile_data.bytes, icc_profile_data.size);
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if (WEBP_MUX_OK == WebPMuxGetChunk(mux, "EXIF", &exif_data))
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exif = PyBytes_FromStringAndSize((const char*)exif_data.bytes, exif_data.size);
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WebPDataClear(&image.bitstream);
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WebPMuxDelete(mux);
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}
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#endif
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}
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if (vp8_status_code != VP8_STATUS_OK)
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goto end;
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if (config.output.colorspace < MODE_YUV) {
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bytes = PyBytes_FromStringAndSize((char *)config.output.u.RGBA.rgba,
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config.output.u.RGBA.size);
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} else {
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// Skipping YUV for now. Need Test Images.
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// UNDONE -- unclear if we'll ever get here if we set mode_rgb*
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bytes = PyBytes_FromStringAndSize((char *)config.output.u.YUVA.y,
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config.output.u.YUVA.y_size);
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}
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#if PY_VERSION_HEX >= 0x03000000
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pymode = PyUnicode_FromString(mode);
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#else
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pymode = PyString_FromString(mode);
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#endif
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ret = Py_BuildValue("SiiSSS", bytes, config.output.width,
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config.output.height, pymode,
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NULL == icc_profile ? Py_None : icc_profile,
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NULL == exif ? Py_None : exif);
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end:
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WebPFreeDecBuffer(&config.output);
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Py_XDECREF(bytes);
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Py_XDECREF(pymode);
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Py_XDECREF(icc_profile);
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Py_XDECREF(exif);
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if (Py_None == ret)
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Py_RETURN_NONE;
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return ret;
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}
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// Return the decoder's version number, packed in hexadecimal using 8bits for
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// each of major/minor/revision. E.g: v2.5.7 is 0x020507.
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PyObject* WebPDecoderVersion_wrapper(PyObject* self, PyObject* args){
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return Py_BuildValue("i", WebPGetDecoderVersion());
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}
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/*
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* The version of webp that ships with (0.1.3) Ubuntu 12.04 doesn't handle alpha well.
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* Files that are valid with 0.3 are reported as being invalid.
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*/
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int WebPDecoderBuggyAlpha(void) {
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return WebPGetDecoderVersion()==0x0103;
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}
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PyObject* WebPDecoderBuggyAlpha_wrapper(PyObject* self, PyObject* args){
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return Py_BuildValue("i", WebPDecoderBuggyAlpha());
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}
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static PyMethodDef webpMethods[] =
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{
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{"WebPEncode", WebPEncode_wrapper, METH_VARARGS, "WebPEncode"},
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{"WebPDecode", WebPDecode_wrapper, METH_VARARGS, "WebPDecode"},
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{"WebPDecoderVersion", WebPDecoderVersion_wrapper, METH_VARARGS, "WebPVersion"},
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{"WebPDecoderBuggyAlpha", WebPDecoderBuggyAlpha_wrapper, METH_VARARGS, "WebPDecoderBuggyAlpha"},
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{NULL, NULL}
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};
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void addMuxFlagToModule(PyObject* m) {
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#ifdef HAVE_WEBPMUX
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PyModule_AddObject(m, "HAVE_WEBPMUX", Py_True);
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#else
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PyModule_AddObject(m, "HAVE_WEBPMUX", Py_False);
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#endif
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}
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void addTransparencyFlagToModule(PyObject* m) {
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PyModule_AddObject(m, "HAVE_TRANSPARENCY",
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PyBool_FromLong(!WebPDecoderBuggyAlpha()));
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}
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#if PY_VERSION_HEX >= 0x03000000
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PyMODINIT_FUNC
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PyInit__webp(void) {
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PyObject* m;
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static PyModuleDef module_def = {
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PyModuleDef_HEAD_INIT,
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"_webp", /* m_name */
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NULL, /* m_doc */
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-1, /* m_size */
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webpMethods, /* m_methods */
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};
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m = PyModule_Create(&module_def);
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addMuxFlagToModule(m);
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addTransparencyFlagToModule(m);
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return m;
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}
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#else
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PyMODINIT_FUNC
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init_webp(void)
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{
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PyObject* m = Py_InitModule("_webp", webpMethods);
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addMuxFlagToModule(m);
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addTransparencyFlagToModule(m);
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}
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#endif
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