godot/drivers/jpegd/image_loader_jpegd.cpp
Juan Linietsky e8fbf39f88 -Replaced tinyjpg for jpgd (public domain), fixes progressive encoded jpgs and speeds up. Closes #2040
-Removed support of loading BitMap as image, now it must be load as a pnm, also closes #2040
2016-01-03 17:14:28 -03:00

109 lines
2.3 KiB
C++

/*************************************************/
/* image_loader_jpg.cpp */
/*************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/*************************************************/
/* Source code within this file is: */
/* (c) 2007-2016 Juan Linietsky, Ariel Manzur */
/* All Rights Reserved. */
/*************************************************/
#include "image_loader_jpegd.h"
#include "print_string.h"
#include "os/os.h"
#include "jpgd.h"
#include <string.h>
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;
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;
}
void ImageLoaderJPG::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("jpg");
p_extensions->push_back("jpeg");
}
ImageLoaderJPG::ImageLoaderJPG() {
}