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/*************************************************************************/
/* bitmap_loader_pbm.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "bitmap_loader_pbm.h"
#include "os/file_access.h"
#include "scene/resources/bit_mask.h"
static bool _get_token(FileAccessRef& f,uint8_t &saved,PoolVector<uint8_t>& r_token,bool p_binary=false,bool p_single_chunk=false) {
int token_max = r_token.size();
PoolVector<uint8_t>::Write w;
if (token_max)
w=r_token.write();
int ofs=0;
bool lf=false;
while(true) {
uint8_t b;
if (saved) {
b=saved;
saved=0;
} else {
b = f->get_8();
}
if (f->eof_reached()) {
if (ofs) {
w=PoolVector<uint8_t>::Write();
r_token.resize(ofs);
return true;
} else {
return false;
}
}
if (!ofs && !p_binary && b=='#') {
//skip comment
while(b!='\n') {
if (f->eof_reached()) {
return false;
}
b = f->get_8();
}
lf=true;
} else if (b<=32 && !(p_binary && (ofs || lf))) {
if (b=='\n') {
lf=true;
}
if (ofs && !p_single_chunk) {
w=PoolVector<uint8_t>::Write();
r_token.resize(ofs);
saved=b;
return true;
}
} else {
bool resized=false;
while (ofs>=token_max) {
if (token_max)
token_max<<=1;
else
token_max=1;
resized=true;
}
if (resized) {
w=PoolVector<uint8_t>::Write();
r_token.resize(token_max);
w=r_token.write();
}
w[ofs++]=b;
}
}
return false;
}
static int _get_number_from_token(PoolVector<uint8_t>& r_token) {
int len = r_token.size();
PoolVector<uint8_t>::Read r = r_token.read();
return String::to_int((const char*)r.ptr(),len);
}
RES ResourceFormatPBM::load(const String &p_path,const String& p_original_path,Error *r_error) {
#define _RETURN(m_err)\
{\
if (r_error)\
*r_error=m_err;\
ERR_FAIL_V(RES());\
}
FileAccessRef f=FileAccess::open(p_path,FileAccess::READ);
uint8_t saved=0;
if (!f)
_RETURN(ERR_CANT_OPEN);
PoolVector<uint8_t> token;
if (!_get_token(f,saved,token)) {
_RETURN(ERR_PARSE_ERROR);
}
if (token.size()!=2) {
_RETURN(ERR_FILE_CORRUPT);
}
if (token[0]!='P') {
_RETURN(ERR_FILE_CORRUPT);
}
if (token[1]!='1' && token[1]!='4') {
_RETURN(ERR_FILE_CORRUPT);
}
bool bits = token[1]=='4';
if (!_get_token(f,saved,token)) {
_RETURN(ERR_PARSE_ERROR);
}
int width = _get_number_from_token(token);
if (width<=0) {
_RETURN(ERR_FILE_CORRUPT);
}
if (!_get_token(f,saved,token)) {
_RETURN(ERR_PARSE_ERROR);
}
int height = _get_number_from_token(token);
if (height<=0) {
_RETURN(ERR_FILE_CORRUPT);
}
Ref<BitMap> bm;
bm.instance();
bm->create(Size2i(width,height));
if (!bits) {
int required_bytes = width*height;
if (!_get_token(f,saved,token,false,true)) {
_RETURN(ERR_PARSE_ERROR);
}
if (token.size()<required_bytes) {
_RETURN(ERR_FILE_CORRUPT);
}
PoolVector<uint8_t>::Read r=token.read();
for(int i=0;i<height;i++) {
for(int j=0;j<width;j++) {
char num = r[i*width+j];
bm->set_bit(Point2i(j,i),num=='0');
}
}
} else {
//a single, entire token of bits!
if (!_get_token(f,saved,token,true)) {
_RETURN(ERR_PARSE_ERROR);
}
int required_bytes = Math::ceil((width*height)/8.0);
if (token.size()<required_bytes) {
_RETURN(ERR_FILE_CORRUPT);
}
PoolVector<uint8_t>::Read r=token.read();
int bitwidth = width;
if (bitwidth % 8)
bitwidth+=8-(bitwidth%8);
for(int i=0;i<height;i++) {
for(int j=0;j<width;j++) {
int ofs = bitwidth*i+j;
uint8_t byte = r[ofs/8];
bool bit = (byte>>(7-(ofs%8)))&1;
bm->set_bit(Point2i(j,i),!bit);
}
}
}
return bm;
}
void ResourceFormatPBM::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("pbm");
}
bool ResourceFormatPBM::handles_type(const String& p_type) const {
return p_type=="BitMap";
}
String ResourceFormatPBM::get_resource_type(const String &p_path) const {
if (p_path.get_extension().to_lower()=="pbm")
return "BitMap";
return "";
}
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