Error jpeg_load_image_from_buffer(Image *p_image,const uint8_t* p_buffer, int p_buffer_len) {
jpgd::jpeg_decoder_mem_stream mem_stream(p_buffer,p_buffer_len);
jpgd::jpeg_decoder decoder(&mem_stream);
if (decoder.get_error_code() != jpgd::JPGD_SUCCESS) {
return ERR_CANT_OPEN;
}
const int image_width = decoder.get_width();
const int image_height = decoder.get_height();
int comps = decoder.get_num_components();
if (comps==3)
comps=4; //weird
if (decoder.begin_decoding() != jpgd::JPGD_SUCCESS)
return ERR_FILE_CORRUPT;
const int dst_bpl = image_width * comps;
DVector<uint8_t> data;
data.resize(dst_bpl * image_height);
DVector<uint8_t>::Write dw = data.write();
jpgd::uint8 *pImage_data = (jpgd::uint8*)dw.ptr();
for (int y = 0; y < image_height; y++)
{
const jpgd::uint8* pScan_line;
jpgd::uint scan_line_len;
if (decoder.decode((const void**)&pScan_line, &scan_line_len) != jpgd::JPGD_SUCCESS)
{
return ERR_FILE_CORRUPT;
}
jpgd::uint8 *pDst = pImage_data + y * dst_bpl;
memcpy(pDst, pScan_line, dst_bpl);
}
//all good
Image::Format fmt;
if (comps==1)
fmt=Image::FORMAT_GRAYSCALE;
else
fmt=Image::FORMAT_RGBA;
dw = DVector<uint8_t>::Write();
p_image->create(image_width,image_height,0,fmt,data);
return OK;
}
ColorSpaceHandle ColorSpaceManImpl::register_icc_from_memory(Byte const* mem,
size_t size,
int nr_components)
{
JAG_PRECONDITION(mem && nr_components && size);
intrusive_ptr<IICCBased> spec(define_iccbased());
spec->num_components(nr_components);
std::auto_ptr<ISeqStreamInput> mem_stream(
create_stream_from_memory(mem, size));
spec->icc_profile_stream(mem_stream);
return color_space_load(spec);
}
Error ImageLoaderJPG::load_image(Image *p_image,FileAccess *f) {
DVector<uint8_t> src_image;
int src_image_len = f->get_len();
ERR_FAIL_COND_V(src_image_len == 0, ERR_FILE_CORRUPT);
src_image.resize(src_image_len);
DVector<uint8_t>::Write w = src_image.write();
f->get_buffer(&w[0],src_image_len);
f->close();
jpgd::jpeg_decoder_mem_stream mem_stream(w.ptr(),src_image_len);
jpgd::jpeg_decoder decoder(&mem_stream);
if (decoder.get_error_code() != jpgd::JPGD_SUCCESS) {
return ERR_CANT_OPEN;
}
const int image_width = decoder.get_width();
const int image_height = decoder.get_height();
int comps = decoder.get_num_components();
if (comps==3)
comps=4; //weird
if (decoder.begin_decoding() != jpgd::JPGD_SUCCESS)
return ERR_FILE_CORRUPT;
const int dst_bpl = image_width * comps;
DVector<uint8_t> data;
data.resize(dst_bpl * image_height);
DVector<uint8_t>::Write dw = data.write();
jpgd::uint8 *pImage_data = (jpgd::uint8*)dw.ptr();
for (int y = 0; y < image_height; y++)
{
const jpgd::uint8* pScan_line;
jpgd::uint scan_line_len;
if (decoder.decode((const void**)&pScan_line, &scan_line_len) != jpgd::JPGD_SUCCESS)
{
return ERR_FILE_CORRUPT;
}
jpgd::uint8 *pDst = pImage_data + y * dst_bpl;
memcpy(pDst, pScan_line, dst_bpl);
}
//all good
Image::Format fmt;
if (comps==1)
fmt=Image::FORMAT_GRAYSCALE;
else
fmt=Image::FORMAT_RGBA;
dw = DVector<uint8_t>::Write();
w = DVector<uint8_t>::Write();
p_image->create(image_width,image_height,0,fmt,data);
return OK;
}
