bool QWebpHandler::read(QImage *image)
{
if (!ensureScanned() || device()->isSequential())
return false;
if (m_hasFirstFrameRead) {
if (!WebPDemuxNextFrame(&m_iter))
return false;
} else {
m_hasFirstFrameRead = true;
}
WebPBitstreamFeatures features;
VP8StatusCode status = WebPGetFeatures(m_iter.fragment.bytes, m_iter.fragment.size, &features);
if (status != VP8_STATUS_OK)
return false;
QImage result(features.width, features.height, QImage::Format_ARGB32);
uint8_t *output = result.bits();
size_t output_size = result.byteCount();
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
if (!WebPDecodeBGRAInto(
reinterpret_cast<const uint8_t*>(m_iter.fragment.bytes), m_iter.fragment.size,
output, output_size, result.bytesPerLine()))
#else
if (!WebPDecodeARGBInto(
reinterpret_cast<const uint8_t*>(m_iter.fragment.bytes), m_iter.fragment.size,
output, output_size, result.bytesPerLine()))
#endif
return false;
*image = result;
return true;
}
PyObject* WebPGetFeatures_wrapper(PyObject* self, PyObject* args)
{
PyBytesObject *webp_string;
const uint8_t* webp = NULL;
VP8StatusCode vp8_status_code = VP8_STATUS_OK;
Py_ssize_t size;
WebPBitstreamFeatures* const features;
if (!PyArg_ParseTuple(args, "S", &webp_string)) {
Py_INCREF(Py_None);
return Py_None;
}
PyBytes_AsStringAndSize((PyObject *) webp_string, (char**)&webp, &size);
vp8_status_code = WebPGetFeatures(webp, size, features);
if (vp8_status_code == VP8_STATUS_OK) {
printf("%i", features->has_alpha);
} else {
// TODO: raise some sort of error
printf("Error occured checking webp file with code: %d\n", vp8_status_code);
Py_INCREF(Py_None);
return Py_None;
}
free((void*)webp);
return Py_BuildValue("b", features->has_alpha);
}
static ParseStatus CreateRawImageDemuxer(MemBuffer* const mem,
WebPDemuxer** demuxer) {
WebPBitstreamFeatures features;
const VP8StatusCode status =
WebPGetFeatures(mem->buf_, mem->buf_size_, &features);
*demuxer = NULL;
if (status != VP8_STATUS_OK) {
return (status == VP8_STATUS_NOT_ENOUGH_DATA) ? PARSE_NEED_MORE_DATA
: PARSE_ERROR;
}
{
WebPDemuxer* const dmux = (WebPDemuxer*)WebPSafeCalloc(1ULL, sizeof(*dmux));
Frame* const frame = (Frame*)WebPSafeCalloc(1ULL, sizeof(*frame));
if (dmux == NULL || frame == NULL) goto Error;
InitDemux(dmux, mem);
SetFrameInfo(0, mem->buf_size_, 1 /*frame_num*/, 1 /*complete*/, &features,
frame);
if (!AddFrame(dmux, frame)) goto Error;
dmux->state_ = WEBP_DEMUX_DONE;
dmux->canvas_width_ = frame->width_;
dmux->canvas_height_ = frame->height_;
dmux->feature_flags_ |= frame->has_alpha_ ? ALPHA_FLAG : 0;
dmux->num_frames_ = 1;
assert(IsValidSimpleFormat(dmux));
*demuxer = dmux;
return PARSE_OK;
Error:
WebPSafeFree(dmux);
WebPSafeFree(frame);
return PARSE_ERROR;
}
}
void webp_reader<T>::read(unsigned x0, unsigned y0,image_data_32& image)
{
WebPDecoderConfig config;
config_guard guard(config);
if (!WebPInitDecoderConfig(&config))
{
throw image_reader_exception("WEBP reader: WebPInitDecoderConfig failed");
}
config.options.use_cropping = 1;
config.options.crop_left = x0;
config.options.crop_top = y0;
config.options.crop_width = std::min(width_ - x0, image.width());
config.options.crop_height = std::min(height_ - y0, image.height());
if (WebPGetFeatures(buffer_->data(), buffer_->size(), &config.input) != VP8_STATUS_OK)
{
throw image_reader_exception("WEBP reader: WebPGetFeatures failed");
}
config.output.colorspace = MODE_RGBA;
config.output.u.RGBA.rgba = (uint8_t *)image.getBytes();
config.output.u.RGBA.stride = 4 * image.width();
config.output.u.RGBA.size = image.width() * image.height() * 4;
config.output.is_external_memory = 1;
if (WebPDecode(buffer_->data(), buffer_->size(), &config) != VP8_STATUS_OK)
{
throw image_reader_exception("WEBP reader: WebPDecode failed");
}
}
/*!
* readHeaderMemWebP()
*
* Input: data
* size (100 bytes is sufficient)
* &w (<return> width)
* &h (<return> height)
* &spp (<return> spp (3 or 4))
* Return: 0 if OK, 1 on error
*/
l_int32
readHeaderMemWebP(const l_uint8 *data,
size_t size,
l_int32 *pw,
l_int32 *ph,
l_int32 *pspp)
{
WebPBitstreamFeatures features;
PROCNAME("readHeaderWebP");
if (pw) *pw = 0;
if (ph) *ph = 0;
if (pspp) *pspp = 0;
if (!data)
return ERROR_INT("data not defined", procName, 1);
if (!pw || !ph || !pspp)
return ERROR_INT("input ptr(s) not defined", procName, 1);
if (WebPGetFeatures(data, (l_int32)size, &features))
return ERROR_INT("invalid WebP file", procName, 1);
*pw = features.width;
*ph = features.height;
*pspp = (features.has_alpha) ? 4 : 3;
return 0;
}
DEFINE_FUNC_1(webp_get_features, data_buffer_value) {
if (!val_is_buffer(data_buffer_value)) {
val_throw(alloc_string("webp_get_features: Expected to be a buffer"));
return alloc_null();
}
buffer data_buffer = val_to_buffer(data_buffer_value);
int data_len = buffer_size(data_buffer);
char *data_ptr = buffer_data(data_buffer);
WebPBitstreamFeatures features = {0};
VP8StatusCode code = WebPGetFeatures((const unsigned char *)data_ptr, data_len, &features);
if (code != VP8_STATUS_OK) {
val_throw(alloc_string("webp_get_features: Error: (code != VP8_STATUS_OK)"));
return alloc_null();
}
value array = alloc_array(7);
val_array_set_i(array, 0, alloc_int(features.width));
val_array_set_i(array, 1, alloc_int(features.height));
val_array_set_i(array, 2, alloc_int(features.has_alpha));
//val_array_set_i(array, 3, alloc_int(features.bitstream_version));
val_array_set_i(array, 3, alloc_int(0));
val_array_set_i(array, 4, alloc_int(features.no_incremental_decoding));
val_array_set_i(array, 5, alloc_int(features.rotate));
val_array_set_i(array, 6, alloc_int(features.uv_sampling));
return array;
}
Error webp_load_image_from_buffer(Image *p_image, const uint8_t *p_buffer, int p_buffer_len) {
ERR_FAIL_NULL_V(p_image, ERR_INVALID_PARAMETER);
WebPBitstreamFeatures features;
if (WebPGetFeatures(p_buffer, p_buffer_len, &features) != VP8_STATUS_OK) {
// ERR_EXPLAIN("Error decoding WEBP image");
ERR_FAIL_V(ERR_FILE_CORRUPT);
}
PoolVector<uint8_t> dst_image;
int datasize = features.width * features.height * (features.has_alpha ? 4 : 3);
dst_image.resize(datasize);
PoolVector<uint8_t>::Write dst_w = dst_image.write();
bool errdec = false;
if (features.has_alpha) {
errdec = WebPDecodeRGBAInto(p_buffer, p_buffer_len, dst_w.ptr(), datasize, 4 * features.width) == NULL;
} else {
errdec = WebPDecodeRGBInto(p_buffer, p_buffer_len, dst_w.ptr(), datasize, 3 * features.width) == NULL;
}
dst_w = PoolVector<uint8_t>::Write();
//ERR_EXPLAIN("Error decoding webp!");
ERR_FAIL_COND_V(errdec, ERR_FILE_CORRUPT);
p_image->create(features.width, features.height, 0, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image);
return OK;
}
WebPImageReader::WebPImageReader(unsigned char* src, size_t len) :
ImageReader(src, len) {
WebPDecoderConfig config;
if (WebPGetFeatures(source, length, &config.input) == VP8_STATUS_OK) {
alpha = config.input.has_alpha;
width = config.input.width;
height = config.input.height;
}
}
PyObject* WebPDecode_wrapper(PyObject* self, PyObject* args)
{
PyBytesObject *webp_string;
uint8_t *webp;
Py_ssize_t size;
PyObject *ret, *bytes, *pymode;
WebPDecoderConfig config;
VP8StatusCode vp8_status_code = VP8_STATUS_OK;
char* mode = "RGB";
if (!PyArg_ParseTuple(args, "S", &webp_string)) {
Py_RETURN_NONE;
}
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";
}
vp8_status_code = WebPDecode(webp, size, &config);
}
if (vp8_status_code != VP8_STATUS_OK) {
WebPFreeDecBuffer(&config.output);
Py_RETURN_NONE;
}
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);
}
#if PY_VERSION_HEX >= 0x03000000
pymode = PyUnicode_FromString(mode);
#else
pymode = PyString_FromString(mode);
#endif
ret = Py_BuildValue("SiiS", bytes, config.output.width,
config.output.height, pymode);
WebPFreeDecBuffer(&config.output);
return ret;
}
char load(ImlibImage * im, ImlibProgressFunction progress,
char progress_granularity, char immediate_load)
{
uint8_t *data;
size_t size;
int w,h;
int has_alpha;
#if (WEBP_DECODER_ABI_VERSION >= 0x200)
WebPBitstreamFeatures features;
#endif
char ret = 0;
if(im->data)
return 0;
if(!(data = read_file(im->real_file, &size, progress)))
return 0;
#if (WEBP_DECODER_ABI_VERSION >= 0x200)
if(WebPGetFeatures(data, size, &features) != VP8_STATUS_OK)
goto EXIT;
w = features.width;
h = features.height;
has_alpha = features.has_alpha;
#else /* compatibility with versions <= 0.1.3 */
if (!WebPGetInfo(data, size, &w, &h))
goto EXIT;
has_alpha = 0;
#endif
if(!im->loader && !im->data) {
im->w = w;
im->h = h;
if(!IMAGE_DIMENSIONS_OK(w, h))
goto EXIT;
if(!has_alpha)
UNSET_FLAGS(im->flags, F_HAS_ALPHA);
else
SET_FLAGS(im->flags, F_HAS_ALPHA);
im->format = strdup("webp");
}
if((!im->data && im->loader) || immediate_load || progress)
im->data = (DATA32*)WebPDecodeBGRA(data, size, &w, &h);
if(progress)
progress(im, 100, 0, 0, 0, 0);
ret = 1;
EXIT:
free(data);
return ret;
}
static Read *
read_new( const char *filename, void *buf, size_t len )
{
Read *read;
unsigned char header[MINIMAL_HEADER];
if( !(read = VIPS_NEW( NULL, Read )) )
return( NULL );
read->filename = g_strdup( filename );
read->buf = buf;
read->len = len;
read->idec = NULL;
WebPInitDecoderConfig( &read->config );
if( filename ) {
if( vips__get_bytes( filename, header, MINIMAL_HEADER ) &&
WebPGetFeatures( header, MINIMAL_HEADER,
&read->config.input ) != VP8_STATUS_OK ) {
read_free( read );
return( NULL );
}
}
else {
if( WebPGetFeatures( read->buf, read->len,
&read->config.input ) != VP8_STATUS_OK ) {
read_free( read );
return( NULL );
}
}
if( read->config.input.has_alpha )
read->config.output.colorspace = MODE_RGBA;
else
read->config.output.colorspace = MODE_RGB;
read->config.options.use_threads = TRUE;
return( read );
}
bool WebPDecoder::checkSignature(const String & signature) const
{
bool ret = false;
if(signature.size() >= WEBP_HEADER_SIZE)
{
WebPBitstreamFeatures features;
if(VP8_STATUS_OK == WebPGetFeatures((uint8_t *)signature.c_str(),
WEBP_HEADER_SIZE, &features))
{
ret = true;
}
}
return ret;
}
DEF_TEST(Encode_WebpQuality, r) {
SkBitmap bm;
bm.allocN32Pixels(100, 100);
bm.eraseColor(SK_ColorBLUE);
auto dataLossy = SkEncodeBitmap(bm, SkEncodedImageFormat::kWEBP, 99);
auto dataLossLess = SkEncodeBitmap(bm, SkEncodedImageFormat::kWEBP, 100);
enum Format {
kMixed = 0,
kLossy = 1,
kLossless = 2,
};
auto test = [&r](const sk_sp<SkData>& data, Format expected) {
auto printFormat = [](int f) {
switch (f) {
case kMixed: return "mixed";
case kLossy: return "lossy";
case kLossless: return "lossless";
default: return "unknown";
}
};
if (!data) {
ERRORF(r, "Failed to encode. Expected %s", printFormat(expected));
return;
}
WebPBitstreamFeatures features;
auto status = WebPGetFeatures(data->bytes(), data->size(), &features);
if (status != VP8_STATUS_OK) {
ERRORF(r, "Encode had an error %i. Expected %s", status, printFormat(expected));
return;
}
if (expected != features.format) {
ERRORF(r, "Expected %s encode, but got format %s", printFormat(expected),
printFormat(features.format));
}
};
test(dataLossy, kLossy);
test(dataLossLess, kLossless);
}
bool WebPDecoder::readHeader()
{
uint8_t header[WEBP_HEADER_SIZE] = { 0 };
if (m_buf.empty())
{
fs.open(m_filename.c_str(), std::ios::binary);
fs.seekg(0, std::ios::end);
fs_size = safeCastToSizeT(fs.tellg(), "File is too large");
fs.seekg(0, std::ios::beg);
CV_Assert(fs && "File stream error");
CV_CheckGE(fs_size, WEBP_HEADER_SIZE, "File is too small");
CV_CheckLE(fs_size, param_maxFileSize, "File is too large. Increase OPENCV_IMGCODECS_WEBP_MAX_FILE_SIZE parameter if you want to process large files");
fs.read((char*)header, sizeof(header));
CV_Assert(fs && "Can't read WEBP_HEADER_SIZE bytes");
}
else
{
CV_CheckGE(m_buf.total(), WEBP_HEADER_SIZE, "Buffer is too small");
memcpy(header, m_buf.ptr(), sizeof(header));
data = m_buf;
}
WebPBitstreamFeatures features;
if (VP8_STATUS_OK == WebPGetFeatures(header, sizeof(header), &features))
{
m_width = features.width;
m_height = features.height;
if (features.has_alpha)
{
m_type = CV_8UC4;
channels = 4;
}
else
{
m_type = CV_8UC3;
channels = 3;
}
return true;
}
return false;
}
/*!
* \brief pixReadMemWebP()
*
* \param[in] filedata webp compressed data in memory
* \param[in] filesize number of bytes in data
* \return pix 32 bpp, or NULL on error
*
* <pre>
* Notes:
* (1) When the encoded data only has 3 channels (no alpha),
* WebPDecodeRGBAInto() generates a raster of 32-bit pixels, with
* the alpha channel set to opaque (255).
* (2) We don't need to use the gnu runtime functions like fmemopen()
* for redirecting data from a stream to memory, because
* the webp library has been written with memory-to-memory
* functions at the lowest level (which is good!). And, in
* any event, fmemopen() doesn't work with l_binaryReadStream().
* </pre>
*/
PIX *
pixReadMemWebP(const l_uint8 *filedata,
size_t filesize)
{
l_uint8 *out = NULL;
l_int32 w, h, has_alpha, wpl, stride;
l_uint32 *data;
size_t size;
PIX *pix;
WebPBitstreamFeatures features;
PROCNAME("pixReadMemWebP");
if (!filedata)
return (PIX *)ERROR_PTR("filedata not defined", procName, NULL);
if (WebPGetFeatures(filedata, filesize, &features))
return (PIX *)ERROR_PTR("Invalid WebP file", procName, NULL);
w = features.width;
h = features.height;
has_alpha = features.has_alpha;
/* Write from compressed Y,U,V arrays to pix raster data */
pix = pixCreate(w, h, 32);
pixSetInputFormat(pix, IFF_WEBP);
if (has_alpha) pixSetSpp(pix, 4);
data = pixGetData(pix);
wpl = pixGetWpl(pix);
stride = wpl * 4;
size = stride * h;
out = WebPDecodeRGBAInto(filedata, filesize, (uint8_t *)data, size,
stride);
if (out == NULL) { /* error: out should also point to data */
pixDestroy(&pix);
return (PIX *)ERROR_PTR("WebP decode failed", procName, NULL);
}
/* The WebP API expects data in RGBA order. The pix stores
* in host-dependent order with R as the MSB and A as the LSB.
* On little-endian machines, the bytes in the word must
* be swapped; e.g., R goes from byte 0 (LSB) to byte 3 (MSB).
* No swapping is necessary for big-endians. */
pixEndianByteSwap(pix);
return pix;
}
static Read *
read_new( const char *filename, void *data, size_t length )
{
Read *read;
if( !(read = VIPS_NEW( NULL, Read )) )
return( NULL );
read->filename = g_strdup( filename );
read->data = data;
read->length = length;
read->fd = 0;
read->idec = NULL;
if( read->filename ) {
/* libwebp makes streaming from a file source very hard. We
* have to read to a full memory buffer, then copy to out.
*
* mmap the input file, it's slightly quicker.
*/
if( (read->fd = vips__open_image_read( read->filename )) < 0 ||
(read->length = vips_file_length( read->fd )) < 0 ||
!(read->data = vips__mmap( read->fd,
FALSE, read->length, 0 )) ) {
read_free( read );
return( NULL );
}
}
WebPInitDecoderConfig( &read->config );
if( WebPGetFeatures( read->data, MINIMAL_HEADER,
&read->config.input ) != VP8_STATUS_OK ) {
read_free( read );
return( NULL );
}
if( read->config.input.has_alpha )
read->config.output.colorspace = MODE_RGBA;
else
read->config.output.colorspace = MODE_RGB;
read->config.options.use_threads = TRUE;
return( read );
}
// 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;
}
int webpGetInfo(
const uint8_t* data, size_t data_size,
int* width, int* height,
int* has_alpha
) {
WebPBitstreamFeatures features;
if (WebPGetFeatures(data, data_size, &features) != VP8_STATUS_OK) {
return 0;
}
if(width != NULL) {
*width = features.width;
}
if(height != NULL) {
*height = features.height;
}
if(has_alpha != NULL) {
*has_alpha = features.has_alpha;
}
return 1;
}
NS_CC_BEGIN
bool CCImage::_initWithWebpData(void *pData, int nDataLen)
{
#if ENABLE_WEBP
bool bRet = false;
do
{
WebPDecoderConfig config;
if (WebPInitDecoderConfig(&config) == 0) break;
if (WebPGetFeatures((uint8_t*)pData, nDataLen, &config.input) != VP8_STATUS_OK) break;
if (config.input.width == 0 || config.input.height == 0) break;
config.output.colorspace = MODE_RGBA;
m_nBitsPerComponent = 8;
m_nWidth = config.input.width;
m_nHeight = config.input.height;
m_bHasAlpha = true;
int bufferSize = m_nWidth * m_nHeight * 4;
m_pData = new unsigned char[bufferSize];
config.output.u.RGBA.rgba = (uint8_t*)m_pData;
config.output.u.RGBA.stride = m_nWidth * 4;
config.output.u.RGBA.size = bufferSize;
config.output.is_external_memory = 1;
if (WebPDecode((uint8_t*)pData, nDataLen, &config) != VP8_STATUS_OK)
{
delete []m_pData;
m_pData = NULL;
break;
}
bRet = true;
} while (0);
return bRet;
#else
return false;
#endif
}
int LoadWebP(const char* const in_file,
const uint8_t** data, size_t* data_size,
WebPBitstreamFeatures* bitstream) {
VP8StatusCode status;
WebPBitstreamFeatures local_features;
if (!ImgIoUtilReadFile(in_file, data, data_size)) return 0;
if (bitstream == NULL) {
bitstream = &local_features;
}
status = WebPGetFeatures(*data, *data_size, bitstream);
if (status != VP8_STATUS_OK) {
free((void*)*data);
*data = NULL;
*data_size = 0;
PrintWebPError(in_file, status);
return 0;
}
return 1;
}
PyObject* WebPGetFeatures_wrapper(PyObject* self, PyObject* args)
{
PyStringObject *webp_string;
if (!PyArg_ParseTuple(args, "S", &webp_string)) {
Py_INCREF(Py_None);
return Py_None;
}
uint8_t *webp;
Py_ssize_t size;
PyString_AsStringAndSize((struct PyObject *) webp_string, &webp, &size);
WebPBitstreamFeatures features;
VP8StatusCode err = WebPGetFeatures(webp, size, &features);
if (VP8_STATUS_OK != err) {
return PyErr_Format(PyExc_RuntimeError, "WebPGetFeatures returned error: %d", err);
}
return Py_BuildValue("iii", features.width, features.height, features.has_alpha);
}
static Ref<Image> _webp_lossy_unpack(const PoolVector<uint8_t> &p_buffer) {
int size = p_buffer.size() - 4;
ERR_FAIL_COND_V(size <= 0, Ref<Image>());
PoolVector<uint8_t>::Read r = p_buffer.read();
ERR_FAIL_COND_V(r[0] != 'W' || r[1] != 'E' || r[2] != 'B' || r[3] != 'P', Ref<Image>());
WebPBitstreamFeatures features;
if (WebPGetFeatures(&r[4], size, &features) != VP8_STATUS_OK) {
ERR_EXPLAIN("Error unpacking WEBP image:");
ERR_FAIL_V(Ref<Image>());
}
/*
print_line("width: "+itos(features.width));
print_line("height: "+itos(features.height));
print_line("alpha: "+itos(features.has_alpha));
*/
PoolVector<uint8_t> dst_image;
int datasize = features.width * features.height * (features.has_alpha ? 4 : 3);
dst_image.resize(datasize);
PoolVector<uint8_t>::Write dst_w = dst_image.write();
bool errdec = false;
if (features.has_alpha) {
errdec = WebPDecodeRGBAInto(&r[4], size, dst_w.ptr(), datasize, 4 * features.width) == NULL;
} else {
errdec = WebPDecodeRGBInto(&r[4], size, dst_w.ptr(), datasize, 3 * features.width) == NULL;
}
//ERR_EXPLAIN("Error decoding webp! - "+p_file);
ERR_FAIL_COND_V(errdec, Ref<Image>());
dst_w = PoolVector<uint8_t>::Write();
Ref<Image> img = memnew(Image(features.width, features.height, 0, features.has_alpha ? Image::FORMAT_RGBA8 : Image::FORMAT_RGB8, dst_image));
return img;
}
/*!
* pixReadMemWebP()
*
* Input: filedata (webp compressed data in memory)
* filesize (number of bytes in data)
* Return: pix (32 bpp), or null on error
*
* Notes:
* (1) When the encoded data only has 3 channels (no alpha),
* WebPDecodeRGBAInto() generates a raster of 32-bit pixels, with
* the alpha channel set to opaque (255).
* (2) We don't need to use the gnu runtime functions like fmemopen()
* for redirecting data from a stream to memory, because
* the webp library has been written with memory-to-memory
* functions at the lowest level (which is good!). And, in
* any event, fmemopen() doesn't work with l_binaryReadStream().
*/
PIX *
pixReadMemWebP(const l_uint8 *filedata,
size_t filesize)
{
l_uint8 *out = NULL;
l_int32 w, h, has_alpha, wpl, stride;
l_uint32 *data;
size_t size;
PIX *pix;
WebPBitstreamFeatures features;
PROCNAME("pixReadMemWebP");
if (!filedata)
return (PIX *)ERROR_PTR("filedata not defined", procName, NULL);
if (WebPGetFeatures(filedata, filesize, &features))
return (PIX *)ERROR_PTR("Invalid WebP file", procName, NULL);
w = features.width;
h = features.height;
has_alpha = features.has_alpha;
/* Write from compressed Y,U,V arrays to pix raster data */
pix = pixCreate(w, h, 32);
if (has_alpha) pixSetSpp(pix, 4);
data = pixGetData(pix);
wpl = pixGetWpl(pix);
stride = wpl * 4;
size = stride * h;
out = WebPDecodeRGBAInto(filedata, filesize, (uint8_t *)data, size,
stride);
if (out == NULL) { /* error: out should also point to data */
pixDestroy(&pix);
return (PIX *)ERROR_PTR("WebP decode failed", procName, NULL);
}
/* WebP decoder emits opposite byte order for RGBA components */
pixEndianByteSwap(pix);
return pix;
}
NS_CC_BEGIN
bool Image::_initWithWebpData(void *pData, int nDataLen)
{
bool bRet = false;
do
{
WebPDecoderConfig config;
if (WebPInitDecoderConfig(&config) == 0) break;
if (WebPGetFeatures((uint8_t*)pData, nDataLen, &config.input) != VP8_STATUS_OK) break;
if (config.input.width == 0 || config.input.height == 0) break;
config.output.colorspace = MODE_RGBA;
_bitsPerComponent = 8;
_width = config.input.width;
_height = config.input.height;
_hasAlpha = true;
int bufferSize = _width * _height * 4;
_data = new unsigned char[bufferSize];
config.output.u.RGBA.rgba = (uint8_t*)_data;
config.output.u.RGBA.stride = _width * 4;
config.output.u.RGBA.size = bufferSize;
config.output.is_external_memory = 1;
if (WebPDecode((uint8_t*)pData, nDataLen, &config) != VP8_STATUS_OK)
{
delete []_data;
_data = NULL;
break;
}
bRet = true;
} while (0);
return bRet;
}
int ReadWebP(const uint8_t* const data, size_t data_size,
WebPPicture* const pic,
int keep_alpha, Metadata* const metadata) {
int ok = 0;
VP8StatusCode status = VP8_STATUS_OK;
WebPDecoderConfig config;
WebPDecBuffer* const output_buffer = &config.output;
WebPBitstreamFeatures* const bitstream = &config.input;
if (data == NULL || data_size == 0 || pic == NULL) return 0;
// TODO(jzern): add Exif/XMP/ICC extraction.
if (metadata != NULL) {
fprintf(stderr, "Warning: metadata extraction from WebP is unsupported.\n");
}
if (!WebPInitDecoderConfig(&config)) {
fprintf(stderr, "Library version mismatch!\n");
return 0;
}
status = WebPGetFeatures(data, data_size, bitstream);
if (status != VP8_STATUS_OK) {
PrintWebPError("input data", status);
return 0;
}
{
const int has_alpha = keep_alpha && bitstream->has_alpha;
if (pic->use_argb) {
output_buffer->colorspace = has_alpha ? MODE_RGBA : MODE_RGB;
} else {
output_buffer->colorspace = has_alpha ? MODE_YUVA : MODE_YUV;
}
status = DecodeWebP(data, data_size, 0, &config);
if (status == VP8_STATUS_OK) {
pic->width = output_buffer->width;
pic->height = output_buffer->height;
if (pic->use_argb) {
const uint8_t* const rgba = output_buffer->u.RGBA.rgba;
const int stride = output_buffer->u.RGBA.stride;
ok = has_alpha ? WebPPictureImportRGBA(pic, rgba, stride)
: WebPPictureImportRGB(pic, rgba, stride);
} else {
pic->colorspace = has_alpha ? WEBP_YUV420A : WEBP_YUV420;
ok = WebPPictureAlloc(pic);
if (!ok) {
status = VP8_STATUS_OUT_OF_MEMORY;
} else {
const WebPYUVABuffer* const yuva = &output_buffer->u.YUVA;
const int uv_width = (pic->width + 1) >> 1;
const int uv_height = (pic->height + 1) >> 1;
ImgIoUtilCopyPlane(yuva->y, yuva->y_stride,
pic->y, pic->y_stride, pic->width, pic->height);
ImgIoUtilCopyPlane(yuva->u, yuva->u_stride,
pic->u, pic->uv_stride, uv_width, uv_height);
ImgIoUtilCopyPlane(yuva->v, yuva->v_stride,
pic->v, pic->uv_stride, uv_width, uv_height);
if (has_alpha) {
ImgIoUtilCopyPlane(yuva->a, yuva->a_stride,
pic->a, pic->a_stride, pic->width, pic->height);
}
}
}
}
}
static Read *
read_new( const char *filename, const void *data, size_t length, int shrink )
{
Read *read;
if( !(read = VIPS_NEW( NULL, Read )) )
return( NULL );
read->filename = g_strdup( filename );
read->data = data;
read->length = length;
read->shrink = shrink;
read->fd = 0;
read->idec = NULL;
if( read->filename ) {
/* libwebp makes streaming from a file source very hard. We
* have to read to a full memory buffer, then copy to out.
*
* mmap the input file, it's slightly quicker.
*/
if( (read->fd = vips__open_image_read( read->filename )) < 0 ||
(read->length = vips_file_length( read->fd )) < 0 ||
!(read->data = vips__mmap( read->fd,
FALSE, read->length, 0 )) ) {
read_free( read );
return( NULL );
}
}
WebPInitDecoderConfig( &read->config );
if( WebPGetFeatures( read->data, MINIMAL_HEADER,
&read->config.input ) != VP8_STATUS_OK ) {
read_free( read );
return( NULL );
}
if( read->config.input.has_alpha )
read->config.output.colorspace = MODE_RGBA;
else
read->config.output.colorspace = MODE_RGB;
read->config.options.use_threads = 1;
read->width = read->config.input.width / read->shrink;
read->height = read->config.input.height / read->shrink;
if( read->width == 0 ||
read->height == 0 ) {
vips_error( "webp", "%s", _( "bad setting for shrink" ) );
return( NULL );
}
if( read->shrink > 1 ) {
read->config.options.use_scaling = 1;
read->config.options.scaled_width = read->width;
read->config.options.scaled_height = read->height;
}
return( read );
}
static WebPMuxError DisplayInfo(const WebPMux* mux) {
int width, height;
uint32_t flag;
WebPMuxError err = WebPMuxGetCanvasSize(mux, &width, &height);
assert(err == WEBP_MUX_OK); // As WebPMuxCreate() was successful earlier.
printf("Canvas size: %d x %d\n", width, height);
err = WebPMuxGetFeatures(mux, &flag);
if (flag & FRAGMENTS_FLAG) err = WEBP_MUX_INVALID_ARGUMENT;
RETURN_IF_ERROR("Failed to retrieve features\n");
if (flag == 0) {
fprintf(stderr, "No features present.\n");
return err;
}
// Print the features present.
printf("Features present:");
if (flag & ANIMATION_FLAG) printf(" animation");
if (flag & FRAGMENTS_FLAG) printf(" image fragments");
if (flag & ICCP_FLAG) printf(" ICC profile");
if (flag & EXIF_FLAG) printf(" EXIF metadata");
if (flag & XMP_FLAG) printf(" XMP metadata");
if (flag & ALPHA_FLAG) printf(" transparency");
printf("\n");
if ((flag & ANIMATION_FLAG) || (flag & FRAGMENTS_FLAG)) {
const int is_anim = !!(flag & ANIMATION_FLAG);
const WebPChunkId id = is_anim ? WEBP_CHUNK_ANMF : WEBP_CHUNK_FRGM;
const char* const type_str = is_anim ? "frame" : "fragment";
int nFrames;
if (is_anim) {
WebPMuxAnimParams params;
err = WebPMuxGetAnimationParams(mux, ¶ms);
assert(err == WEBP_MUX_OK);
printf("Background color : 0x%.8X Loop Count : %d\n",
params.bgcolor, params.loop_count);
}
err = WebPMuxNumChunks(mux, id, &nFrames);
assert(err == WEBP_MUX_OK);
printf("Number of %ss: %d\n", type_str, nFrames);
if (nFrames > 0) {
int i;
printf("No.: width height alpha x_offset y_offset ");
if (is_anim) printf("duration dispose blend ");
printf("image_size\n");
for (i = 1; i <= nFrames; i++) {
WebPMuxFrameInfo frame;
err = WebPMuxGetFrame(mux, i, &frame);
if (err == WEBP_MUX_OK) {
WebPBitstreamFeatures features;
const VP8StatusCode status = WebPGetFeatures(
frame.bitstream.bytes, frame.bitstream.size, &features);
assert(status == VP8_STATUS_OK); // Checked by WebPMuxCreate().
(void)status;
printf("%3d: %5d %5d %5s %8d %8d ", i, features.width,
features.height, features.has_alpha ? "yes" : "no",
frame.x_offset, frame.y_offset);
if (is_anim) {
const char* const dispose =
(frame.dispose_method == WEBP_MUX_DISPOSE_NONE) ? "none"
: "background";
const char* const blend =
(frame.blend_method == WEBP_MUX_BLEND) ? "yes" : "no";
printf("%8d %10s %5s ", frame.duration, dispose, blend);
}
printf("%10d\n", (int)frame.bitstream.size);
}
WebPDataClear(&frame.bitstream);
RETURN_IF_ERROR3("Failed to retrieve %s#%d\n", type_str, i);
}
}
}
if (flag & ICCP_FLAG) {
WebPData icc_profile;
err = WebPMuxGetChunk(mux, "ICCP", &icc_profile);
assert(err == WEBP_MUX_OK);
printf("Size of the ICC profile data: %d\n", (int)icc_profile.size);
}
if (flag & EXIF_FLAG) {
WebPData exif;
err = WebPMuxGetChunk(mux, "EXIF", &exif);
assert(err == WEBP_MUX_OK);
printf("Size of the EXIF metadata: %d\n", (int)exif.size);
}
if (flag & XMP_FLAG) {
WebPData xmp;
err = WebPMuxGetChunk(mux, "XMP ", &xmp);
assert(err == WEBP_MUX_OK);
printf("Size of the XMP metadata: %d\n", (int)xmp.size);
}
if ((flag & ALPHA_FLAG) && !(flag & (ANIMATION_FLAG | FRAGMENTS_FLAG))) {
WebPMuxFrameInfo image;
err = WebPMuxGetFrame(mux, 1, &image);
if (err == WEBP_MUX_OK) {
printf("Size of the image (with alpha): %d\n", (int)image.bitstream.size);
}
WebPDataClear(&image.bitstream);
RETURN_IF_ERROR("Failed to retrieve the image\n");
}
return WEBP_MUX_OK;
}
GDALDataset *WEBPDataset::Open( GDALOpenInfo * poOpenInfo )
{
if( !Identify( poOpenInfo ) || poOpenInfo->fpL == NULL )
return NULL;
int nWidth, nHeight;
if (!WebPGetInfo((const uint8_t*)poOpenInfo->pabyHeader, (uint32_t)poOpenInfo->nHeaderBytes,
&nWidth, &nHeight))
return NULL;
int nBands = 3;
#if WEBP_DECODER_ABI_VERSION >= 0x0002
WebPDecoderConfig config;
if (!WebPInitDecoderConfig(&config))
return NULL;
int bOK = WebPGetFeatures(poOpenInfo->pabyHeader, poOpenInfo->nHeaderBytes, &config.input) == VP8_STATUS_OK;
if (config.input.has_alpha)
nBands = 4;
WebPFreeDecBuffer(&config.output);
if (!bOK)
return NULL;
#endif
if( poOpenInfo->eAccess == GA_Update )
{
CPLError( CE_Failure, CPLE_NotSupported,
"The WEBP driver does not support update access to existing"
" datasets.\n" );
return NULL;
}
/* -------------------------------------------------------------------- */
/* Create a corresponding GDALDataset. */
/* -------------------------------------------------------------------- */
WEBPDataset *poDS;
poDS = new WEBPDataset();
poDS->nRasterXSize = nWidth;
poDS->nRasterYSize = nHeight;
poDS->fpImage = poOpenInfo->fpL;
poOpenInfo->fpL = NULL;
/* -------------------------------------------------------------------- */
/* Create band information objects. */
/* -------------------------------------------------------------------- */
for( int iBand = 0; iBand < nBands; iBand++ )
poDS->SetBand( iBand+1, new WEBPRasterBand( poDS, iBand+1 ) );
/* -------------------------------------------------------------------- */
/* Initialize any PAM information. */
/* -------------------------------------------------------------------- */
poDS->SetDescription( poOpenInfo->pszFilename );
poDS->TryLoadXML( poOpenInfo->GetSiblingFiles() );
/* -------------------------------------------------------------------- */
/* Open overviews. */
/* -------------------------------------------------------------------- */
poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename, poOpenInfo->GetSiblingFiles() );
return poDS;
}
// Store image bearing chunks to 'frame'.
static ParseStatus StoreFrame(int frame_num, uint32_t min_size,
MemBuffer* const mem, Frame* const frame) {
int alpha_chunks = 0;
int image_chunks = 0;
int done = (MemDataSize(mem) < min_size);
ParseStatus status = PARSE_OK;
if (done) return PARSE_NEED_MORE_DATA;
do {
const size_t chunk_start_offset = mem->start_;
const uint32_t fourcc = ReadLE32(mem);
const uint32_t payload_size = ReadLE32(mem);
const uint32_t payload_size_padded = payload_size + (payload_size & 1);
const size_t payload_available = (payload_size_padded > MemDataSize(mem))
? MemDataSize(mem) : payload_size_padded;
const size_t chunk_size = CHUNK_HEADER_SIZE + payload_available;
if (payload_size > MAX_CHUNK_PAYLOAD) return PARSE_ERROR;
if (SizeIsInvalid(mem, payload_size_padded)) return PARSE_ERROR;
if (payload_size_padded > MemDataSize(mem)) status = PARSE_NEED_MORE_DATA;
switch (fourcc) {
case MKFOURCC('A', 'L', 'P', 'H'):
if (alpha_chunks == 0) {
++alpha_chunks;
frame->img_components_[1].offset_ = chunk_start_offset;
frame->img_components_[1].size_ = chunk_size;
frame->has_alpha_ = 1;
frame->frame_num_ = frame_num;
Skip(mem, payload_available);
} else {
goto Done;
}
break;
case MKFOURCC('V', 'P', '8', 'L'):
if (alpha_chunks > 0) return PARSE_ERROR; // VP8L has its own alpha
// fall through
case MKFOURCC('V', 'P', '8', ' '):
if (image_chunks == 0) {
// Extract the bitstream features, tolerating failures when the data
// is incomplete.
WebPBitstreamFeatures features;
const VP8StatusCode vp8_status =
WebPGetFeatures(mem->buf_ + chunk_start_offset, chunk_size,
&features);
if (status == PARSE_NEED_MORE_DATA &&
vp8_status == VP8_STATUS_NOT_ENOUGH_DATA) {
return PARSE_NEED_MORE_DATA;
} else if (vp8_status != VP8_STATUS_OK) {
// We have enough data, and yet WebPGetFeatures() failed.
return PARSE_ERROR;
}
++image_chunks;
frame->img_components_[0].offset_ = chunk_start_offset;
frame->img_components_[0].size_ = chunk_size;
frame->width_ = features.width;
frame->height_ = features.height;
frame->has_alpha_ |= features.has_alpha;
frame->frame_num_ = frame_num;
frame->complete_ = (status == PARSE_OK);
Skip(mem, payload_available);
} else {
goto Done;
}
break;
Done:
default:
// Restore fourcc/size when moving up one level in parsing.
Rewind(mem, CHUNK_HEADER_SIZE);
done = 1;
break;
}
if (mem->start_ == mem->riff_end_) {
done = 1;
} else if (MemDataSize(mem) < CHUNK_HEADER_SIZE) {
status = PARSE_NEED_MORE_DATA;
}
} while (!done && status == PARSE_OK);
return status;
}
bool WEBPImageDecoder::decode(bool onlySize)
{
if (failed())
return false;
const uint8_t* dataBytes = reinterpret_cast<const uint8_t*>(m_data->data());
const size_t dataSize = m_data->size();
if (!ImageDecoder::isSizeAvailable()) {
static const size_t imageHeaderSize = 30;
if (dataSize < imageHeaderSize)
return false;
int width, height;
#ifdef QCMS_WEBP_COLOR_CORRECTION
WebPData inputData = { dataBytes, dataSize };
WebPDemuxState state;
WebPDemuxer* demuxer = WebPDemuxPartial(&inputData, &state);
if (!demuxer)
return setFailed();
width = WebPDemuxGetI(demuxer, WEBP_FF_CANVAS_WIDTH);
height = WebPDemuxGetI(demuxer, WEBP_FF_CANVAS_HEIGHT);
m_formatFlags = WebPDemuxGetI(demuxer, WEBP_FF_FORMAT_FLAGS);
m_hasAlpha = !!(m_formatFlags & ALPHA_FLAG);
WebPDemuxDelete(demuxer);
if (state <= WEBP_DEMUX_PARSING_HEADER)
return false;
#elif (WEBP_DECODER_ABI_VERSION >= 0x0163)
WebPBitstreamFeatures features;
if (WebPGetFeatures(dataBytes, dataSize, &features) != VP8_STATUS_OK)
return setFailed();
width = features.width;
height = features.height;
m_hasAlpha = features.has_alpha;
#else
// Earlier version won't be able to display WebP files with alpha.
if (!WebPGetInfo(dataBytes, dataSize, &width, &height))
return setFailed();
m_hasAlpha = false;
#endif
if (!setSize(width, height))
return setFailed();
}
ASSERT(ImageDecoder::isSizeAvailable());
if (onlySize)
return true;
ASSERT(!m_frameBufferCache.isEmpty());
ImageFrame& buffer = m_frameBufferCache[0];
ASSERT(buffer.status() != ImageFrame::FrameComplete);
if (buffer.status() == ImageFrame::FrameEmpty) {
if (!buffer.setSize(size().width(), size().height()))
return setFailed();
buffer.setStatus(ImageFrame::FramePartial);
buffer.setHasAlpha(m_hasAlpha);
buffer.setOriginalFrameRect(IntRect(IntPoint(), size()));
}
if (!m_decoder) {
WEBP_CSP_MODE mode = outputMode(m_hasAlpha);
if (!m_premultiplyAlpha)
mode = outputMode(false);
if ((m_formatFlags & ICCP_FLAG) && !ignoresGammaAndColorProfile())
mode = MODE_RGBA; // Decode to RGBA for input to libqcms.
int rowStride = size().width() * sizeof(ImageFrame::PixelData);
uint8_t* output = reinterpret_cast<uint8_t*>(buffer.getAddr(0, 0));
int outputSize = size().height() * rowStride;
m_decoder = WebPINewRGB(mode, output, outputSize, rowStride);
if (!m_decoder)
return setFailed();
}
switch (WebPIUpdate(m_decoder, dataBytes, dataSize)) {
case VP8_STATUS_OK:
if ((m_formatFlags & ICCP_FLAG) && !ignoresGammaAndColorProfile())
applyColorProfile(dataBytes, dataSize, buffer);
buffer.setStatus(ImageFrame::FrameComplete);
clear();
return true;
case VP8_STATUS_SUSPENDED:
if ((m_formatFlags & ICCP_FLAG) && !ignoresGammaAndColorProfile())
applyColorProfile(dataBytes, dataSize, buffer);
return false;
default:
clear();
return setFailed();
}
}
