size_t webpEncodeGray(
const uint8_t* gray, int width, int height, int stride, float quality_factor,
uint8_t** output
) {
size_t output_size;
uint8_t* rgb;
int x, y;
if((rgb = (uint8_t*)malloc(width*height*3)) == NULL) {
return 0;
}
for(y = 0; y < height; ++y) {
const uint8_t* src = gray + y*stride;
uint8_t* dst = rgb + y*width*3;
for(x = 0; x < width; ++x) {
uint8_t v = *src++;
*dst++ = v;
*dst++ = v;
*dst++ = v;
}
}
output_size = WebPEncodeRGB(rgb, width, height, width*3, quality_factor, output);
free(rgb);
return output_size;
}
PyObject* WebPEncodeRGB_wrapper(PyObject* self, PyObject* args)
{
PyBytesObject *rgb_string;
int width;
int height;
int stride;
float quality_factor;
uint8_t *rgb;
uint8_t *output;
Py_ssize_t size;
size_t ret_size;
if (!PyArg_ParseTuple(args, "Siiif", &rgb_string, &width, &height, &stride, &quality_factor)) {
Py_INCREF(Py_None);
return Py_None;
}
PyBytes_AsStringAndSize((PyObject *) rgb_string, (char**)&rgb, &size);
if (stride * height > size) {
Py_INCREF(Py_None);
return Py_None;
}
ret_size = WebPEncodeRGB(rgb, width, height, stride, quality_factor, &output);
if (ret_size > 0) {
PyObject *ret = PyBytes_FromStringAndSize((char*)output, ret_size);
free(output);
return ret;
}
Py_INCREF(Py_None);
return Py_None;
}
uint8_t* webpEncodeRGB(
const uint8_t* rgb, int width, int height, int stride, float quality_factor,
size_t* output_size
) {
uint8_t* output = NULL;
*output_size = WebPEncodeRGB(rgb, width, height, stride, quality_factor, &output);
return output;
}
static int iwwebp_write_main(struct iwwebpwritecontext *wctx)
{
struct iw_image *img;
size_t ret;
uint8_t *cmpr_webp_data = NULL;
int retval=0;
double quality;
img = wctx->img;
quality = iw_get_value_dbl(wctx->ctx,IW_VAL_WEBP_QUALITY);
if(quality<0.0) {
quality=80.0; // Default quality.
}
switch(img->imgtype) {
case IW_IMGTYPE_GRAY:
// IW requires encoders to support grayscale, but WebP doesn't (?)
// support it. So, convert grayscale images to RGB.
iwwebp_gray_to_rgb(wctx); // Allocates RGB image at wctx->tmppixels.
if(!wctx->tmppixels) goto done;
ret = WebPEncodeRGB(wctx->tmppixels, img->width, img->height, 3*img->width, (float)quality, &cmpr_webp_data);
break;
case IW_IMGTYPE_RGB:
ret = WebPEncodeRGB(img->pixels, img->width, img->height, (int)img->bpr, (float)quality, &cmpr_webp_data);
break;
default:
iw_seterror(wctx->ctx,iwwebp_get_string(wctx->ctx,iws_webp_enc_bad_imgtype),img->imgtype);
goto done;
}
if(ret<1 || !cmpr_webp_data) {
goto done;
}
iwwebp_write(wctx, cmpr_webp_data, ret);
retval=1;
done:
if(cmpr_webp_data) free(cmpr_webp_data);
if(wctx->tmppixels) iw_free(wctx->tmppixels);
return 1;
}
void convert_tiff_to_webp_gray(const char* file_name, const char* out_file_name)
{
TIFF* tif = TIFFOpen(file_name, "r");
if (tif)
{
uint32 w, h;
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
uint32 imagelength;
unsigned char gray_value;
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &imagelength);
tsize_t scanline = TIFFScanlineSize(tif);
unsigned char *buf = (unsigned char*)_TIFFmalloc(scanline);
unsigned char *result = (unsigned char*)malloc(3 * w * h + 1);
int iterator = 0;
for (uint32 row = 0; row < h; ++row)
{
TIFFReadScanline(tif, buf, row);
for (uint32 col = 0; col < w * 3; col+=3)
{
gray_value = (unsigned char)(((float)buf[col] + (float)buf[col + 1] + (float)buf[col + 2]) / 3.0 + 0.5);
result[iterator] = gray_value;
result[iterator + 1] = gray_value;
result[iterator + 2] = gray_value;
iterator += 3;
}
}
uint8_t* output;
FILE *op_file;
size_t d_size;
d_size = WebPEncodeRGB(result, w, h, 3 * w, 100.0, &output);
op_file=fopen(out_file_name,"wb");
fwrite(output,1,(int)d_size, op_file);
free(result);
_TIFFfree(buf);
TIFFClose(tif);
}
else
{
printf("I can't open the TIF file\n");
}
}
PyObject* WebPEncode_wrapper(PyObject* self, PyObject* args)
{
int width;
int height;
float quality_factor;
uint8_t *rgb;
uint8_t *output;
char *mode;
Py_ssize_t size;
size_t ret_size;
if (!PyArg_ParseTuple(args, "s#iifs",(char**)&rgb, &size, &width, &height, &quality_factor, &mode)) {
Py_RETURN_NONE;
}
if (strcmp(mode, "RGBA")==0){
if (size < width * height * 4){
Py_RETURN_NONE;
}
ret_size = WebPEncodeRGBA(rgb, width, height, 4* width, quality_factor, &output);
} else if (strcmp(mode, "RGB")==0){
if (size < width * height * 3){
Py_RETURN_NONE;
}
ret_size = WebPEncodeRGB(rgb, width, height, 3* width, quality_factor, &output);
} else {
Py_RETURN_NONE;
}
if (ret_size > 0) {
PyObject *ret = PyBytes_FromStringAndSize((char*)output, ret_size);
free(output);
return ret;
}
Py_RETURN_NONE;
}
static PoolVector<uint8_t> _webp_lossy_pack(const Ref<Image> &p_image, float p_quality) {
ERR_FAIL_COND_V(p_image.is_null() || p_image->empty(), PoolVector<uint8_t>());
Ref<Image> img = p_image->duplicate();
if (img->detect_alpha())
img->convert(Image::FORMAT_RGBA8);
else
img->convert(Image::FORMAT_RGB8);
Size2 s(img->get_width(), img->get_height());
PoolVector<uint8_t> data = img->get_data();
PoolVector<uint8_t>::Read r = data.read();
uint8_t *dst_buff = NULL;
size_t dst_size = 0;
if (img->get_format() == Image::FORMAT_RGB8) {
dst_size = WebPEncodeRGB(r.ptr(), s.width, s.height, 3 * s.width, CLAMP(p_quality * 100.0, 0, 100.0), &dst_buff);
} else {
dst_size = WebPEncodeRGBA(r.ptr(), s.width, s.height, 4 * s.width, CLAMP(p_quality * 100.0, 0, 100.0), &dst_buff);
}
ERR_FAIL_COND_V(dst_size == 0, PoolVector<uint8_t>());
PoolVector<uint8_t> dst;
dst.resize(4 + dst_size);
PoolVector<uint8_t>::Write w = dst.write();
w[0] = 'W';
w[1] = 'E';
w[2] = 'B';
w[3] = 'P';
copymem(&w[4], dst_buff, dst_size);
free(dst_buff);
w = PoolVector<uint8_t>::Write();
return dst;
}
size_t webpEncodeRGB(
const uint8_t* rgb, int width, int height, int stride, float quality_factor,
uint8_t** output
) {
return WebPEncodeRGB(rgb, width, height, stride, quality_factor, output);
}
PyObject* WebPEncode_wrapper(PyObject* self, PyObject* args)
{
int width;
int height;
int lossless;
float quality_factor;
uint8_t *rgb;
uint8_t *icc_bytes;
uint8_t *exif_bytes;
uint8_t *output;
char *mode;
Py_ssize_t size;
Py_ssize_t icc_size;
Py_ssize_t exif_size;
size_t ret_size;
if (!PyArg_ParseTuple(args, "s#iiifss#s#",
(char**)&rgb, &size, &width, &height, &lossless, &quality_factor, &mode,
&icc_bytes, &icc_size, &exif_bytes, &exif_size)) {
Py_RETURN_NONE;
}
if (strcmp(mode, "RGBA")==0){
if (size < width * height * 4){
Py_RETURN_NONE;
}
if (lossless) {
ret_size = WebPEncodeLosslessRGBA(rgb, width, height, 4* width, &output);
} else {
ret_size = WebPEncodeRGBA(rgb, width, height, 4* width, quality_factor, &output);
}
} else if (strcmp(mode, "RGB")==0){
if (size < width * height * 3){
Py_RETURN_NONE;
}
if (lossless) {
ret_size = WebPEncodeLosslessRGB(rgb, width, height, 3* width, &output);
} else {
ret_size = WebPEncodeRGB(rgb, width, height, 3* width, quality_factor, &output);
}
} else {
Py_RETURN_NONE;
}
#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;
WebPData output_data = {0};
WebPData image = { output, ret_size };
WebPData icc_profile = { icc_bytes, i_icc_size };
WebPData exif = { exif_bytes, i_exif_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 (dbg && err == WEBP_MUX_INVALID_ARGUMENT) {
fprintf(stderr, "Invalid ICC Argument\n");
} else if (dbg && err == WEBP_MUX_MEMORY_ERROR) {
fprintf(stderr, "ICC Memory Error\n");
}
}
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 (dbg && err == WEBP_MUX_INVALID_ARGUMENT) {
fprintf(stderr, "Invalid Exif Argument\n");
} else if (dbg && err == WEBP_MUX_MEMORY_ERROR) {
fprintf(stderr, "Exif Memory Error\n");
}
}
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;
}
int
ImagingWebPEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
{
WEBPCONTEXT* context = (WEBPCONTEXT*) state->context;
UINT8* buffer;
UINT8* ptr;
int y, stride;
float quality = 75.0F;
if (!state->state) {
/* copy image contents to packed buffer and compress it */
stride = state->xsize * 3;
buffer = malloc(im->ysize * stride);
if (!buffer) {
state->errcode = IMAGING_CODEC_MEMORY;
return -1;
}
for (ptr = buffer, y = 0; y < state->ysize; ptr += stride, y++) {
state->shuffle(ptr, (UINT8*) im->image[y + state->yoff] +
state->xoff * im->pixelsize, state->xsize);
}
if (context->quality > 0)
quality = (float) context->quality;
context->output_size = WebPEncodeRGB(buffer,
state->xsize, state->ysize,
stride, quality,
&context->output_data);
free(buffer);
if (!context->output_size) {
state->errcode = IMAGING_CODEC_BROKEN;
return -1;
}
state->state++;
/* keep a pointer to the full buffer */
context->output_buffer = context->output_data;
}
if (context->output_size < bytes) {
/* copy remaining part to output buffer */
memcpy(buf, context->output_data, context->output_size);
state->errcode = IMAGING_CODEC_END;
free(context->output_buffer);
return context->output_size;
} else {
/* not enough space; fill the buffer and try again next time */
memcpy(buf, context->output_data, bytes);
context->output_data += bytes;
context->output_size -= bytes;
return bytes;
}
}