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/*************************************************/
/* image_loader_webp.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_webp.h"
#include "print_string.h"
#include "os/os.h"
#include "drivers/webp/decode.h"
#include "drivers/webp/encode.h"
#include "io/marshalls.h"
#include <stdlib.h>
static DVector<uint8_t> _webp_lossy_pack(const Image& p_image,float p_quality) {
ERR_FAIL_COND_V(p_image.empty(),DVector<uint8_t>());
Image img=p_image;
if (img.detect_alpha())
img.convert(Image::FORMAT_RGBA);
else
img.convert(Image::FORMAT_RGB);
Size2 s(img.get_width(),img.get_height());
DVector<uint8_t> data = img.get_data();
DVector<uint8_t>::Read r = data.read();
uint8_t *dst_buff=NULL;
size_t dst_size=0;
if (img.get_format()==Image::FORMAT_RGB) {
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,DVector<uint8_t>());
DVector<uint8_t> dst;
dst.resize(4+dst_size);
DVector<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=DVector<uint8_t>::Write();
return dst;
}
static Image _webp_lossy_unpack(const DVector<uint8_t>& p_buffer) {
int size = p_buffer.size()-4;
ERR_FAIL_COND_V(size<=0,Image());
DVector<uint8_t>::Read r = p_buffer.read();
ERR_FAIL_COND_V(r[0]!='W' || r[1]!='E' || r[2]!='B' || r[3]!='P',Image());
WebPBitstreamFeatures features;
if (WebPGetFeatures(&r[4],size,&features)!=VP8_STATUS_OK) {
ERR_EXPLAIN("Error unpacking WEBP image:");
ERR_FAIL_V(Image());
}
//print_line("width: "+itos(features.width));
//print_line("height: "+itos(features.height));
//print_line("alpha: "+itos(features.has_alpha));
DVector<uint8_t> dst_image;
int datasize = features.width*features.height*(features.has_alpha?4:3);
dst_image.resize(datasize);
DVector<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,Image());
dst_w = DVector<uint8_t>::Write();
return Image(features.width,features.height,0,features.has_alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB,dst_image);
}
Error ImageLoaderWEBP::load_image(Image *p_image,FileAccess *f) {
uint32_t size = f->get_len();
DVector<uint8_t> src_image;
src_image.resize(size);
WebPBitstreamFeatures features;
DVector<uint8_t>::Write src_w = src_image.write();
f->get_buffer(src_w.ptr(),size);
ERR_FAIL_COND_V(f->eof_reached(), ERR_FILE_EOF);
if (WebPGetFeatures(src_w.ptr(),size,&features)!=VP8_STATUS_OK) {
f->close();
//ERR_EXPLAIN("Error decoding WEBP image: "+p_file);
ERR_FAIL_V(ERR_FILE_CORRUPT);
}
print_line("width: "+itos(features.width));
print_line("height: "+itos(features.height));
print_line("alpha: "+itos(features.has_alpha));
src_w = DVector<uint8_t>::Write();
DVector<uint8_t> dst_image;
int datasize = features.width*features.height*(features.has_alpha?4:3);
dst_image.resize(datasize);
DVector<uint8_t>::Read src_r = src_image.read();
DVector<uint8_t>::Write dst_w = dst_image.write();
bool errdec=false;
if (features.has_alpha) {
errdec = WebPDecodeRGBAInto(src_r.ptr(),size,dst_w.ptr(),datasize,4*features.width)==NULL;
} else {
errdec = WebPDecodeRGBInto(src_r.ptr(),size,dst_w.ptr(),datasize,3*features.width)==NULL;
}
//ERR_EXPLAIN("Error decoding webp! - "+p_file);
ERR_FAIL_COND_V(errdec,ERR_FILE_CORRUPT);
src_r = DVector<uint8_t>::Read();
dst_w = DVector<uint8_t>::Write();
*p_image = Image(features.width,features.height,0,features.has_alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB,dst_image);
return OK;
}
void ImageLoaderWEBP::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("webp");
}
ImageLoaderWEBP::ImageLoaderWEBP() {
Image::lossy_packer=_webp_lossy_pack;
Image::lossy_unpacker=_webp_lossy_unpack;
}
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