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, ×tamp, &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);
}
// 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;
}
/* Save an animation to disk */
gboolean save_animation(gint32 nLayers,
gint32 *allLayers,
FILE *outfile,
WebPSaveParams *params,
GError **error)
{
gboolean status = FALSE;
gboolean innerStatus = TRUE;
WebPAnimEncoderOptions enc_options;
WebPAnimEncoder *enc = NULL;
int frame_timestamp = 0;
WebPData webp_data = {0};
WebPMux *mux;
WebPMuxAnimParams anim_params = {0};
/* Prepare for encoding an animation */
WebPAnimEncoderOptionsInit(&enc_options);
do {
int i;
gint32 drawable_ID = allLayers[0];
/* Create the encoder */
enc = WebPAnimEncoderNew(gimp_drawable_width(drawable_ID),
gimp_drawable_height(drawable_ID),
&enc_options);
/* Encode each layer */
for (i = 0; i < nLayers; i++) {
if ((innerStatus = save_layer(allLayers[i],
NULL,
NULL,
TRUE,
enc,
frame_timestamp,
params,
error)) == FALSE) {
break;
}
}
/* Check to make sure each layer was encoded correctly */
if (innerStatus == FALSE) {
break;
}
/* Add NULL frame */
WebPAnimEncoderAdd(enc, NULL, frame_timestamp, NULL);
/* Initialize the WebP image structure */
WebPDataInit(&webp_data);
/* Write the animation to the image */
if (!WebPAnimEncoderAssemble(enc, &webp_data)) {
g_set_error(error,
G_FILE_ERROR,
0,
"Encoding error: '%s'",
WebPAnimEncoderGetError(enc));
break;
}
/* Create a Mux */
mux = WebPMuxCreate(&webp_data, 1);
/* Set animation parameters */
anim_params.loop_count = params->loop == TRUE ? 0 : 1;
WebPMuxSetAnimationParams(mux, &anim_params);
/* Assemble the image */
WebPMuxAssemble(mux, &webp_data);
/* Write to disk */
if (fwrite(webp_data.bytes, webp_data.size, 1, outfile) != 1) {
break;
}
/* Everything succeeded */
status = TRUE;
} while(0);
/* Free image data */
WebPDataClear(&webp_data);
/* Free the animation encoder */
if (enc) {
WebPAnimEncoderDelete(enc);
}
return status;
}