c7bc44d5ad
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer with state-of-the-art rendering techniques tuned to work as low as middle end handheld devices - without compromising with the possibilities given for higher end desktop games of course. Great times ahead for the Godot community and the gamers that will play our games!
156 lines
4.6 KiB
C++
156 lines
4.6 KiB
C++
/*************************************************************************/
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/* compression.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "zlib.h"
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#include "os/copymem.h"
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#include "compression.h"
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#include "fastlz.h"
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#include "zip_io.h"
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int Compression::compress(uint8_t *p_dst, const uint8_t *p_src, int p_src_size,Mode p_mode) {
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switch(p_mode) {
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case MODE_FASTLZ: {
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if (p_src_size<16) {
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uint8_t src[16];
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zeromem(&src[p_src_size],16-p_src_size);
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copymem(src,p_src,p_src_size);
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return fastlz_compress(src,16,p_dst);
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} else {
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return fastlz_compress(p_src,p_src_size,p_dst);
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}
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} break;
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case MODE_DEFLATE: {
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z_stream strm;
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strm.zalloc = zipio_alloc;
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strm.zfree = zipio_free;
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strm.opaque = Z_NULL;
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int err = deflateInit(&strm,Z_DEFAULT_COMPRESSION);
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if (err!=Z_OK)
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return -1;
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strm.avail_in=p_src_size;
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int aout = deflateBound(&strm,p_src_size);;
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/*if (aout>p_src_size) {
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deflateEnd(&strm);
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return -1;
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}*/
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strm.avail_out=aout;
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strm.next_in=(Bytef*)p_src;
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strm.next_out=p_dst;
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deflate(&strm,Z_FINISH);
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aout = aout - strm.avail_out;
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deflateEnd(&strm);
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return aout;
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} break;
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}
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ERR_FAIL_V(-1);
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}
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int Compression::get_max_compressed_buffer_size(int p_src_size,Mode p_mode){
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switch(p_mode) {
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case MODE_FASTLZ: {
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int ss = p_src_size+p_src_size*6/100;
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if (ss<66)
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ss=66;
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return ss;
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} break;
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case MODE_DEFLATE: {
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z_stream strm;
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strm.zalloc = zipio_alloc;
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strm.zfree = zipio_free;
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strm.opaque = Z_NULL;
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int err = deflateInit(&strm,Z_DEFAULT_COMPRESSION);
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if (err!=Z_OK)
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return -1;
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int aout = deflateBound(&strm,p_src_size);
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deflateEnd(&strm);
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return aout;
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} break;
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}
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ERR_FAIL_V(-1);
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}
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int Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p_src, int p_src_size,Mode p_mode){
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switch(p_mode) {
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case MODE_FASTLZ: {
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int ret_size=0;
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if (p_dst_max_size<16) {
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uint8_t dst[16];
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ret_size = fastlz_decompress(p_src,p_src_size,dst,16);
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copymem(p_dst,dst,p_dst_max_size);
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} else {
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ret_size = fastlz_decompress(p_src,p_src_size,p_dst,p_dst_max_size);
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}
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return ret_size;
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} break;
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case MODE_DEFLATE: {
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z_stream strm;
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strm.zalloc = zipio_alloc;
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strm.zfree = zipio_free;
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strm.opaque = Z_NULL;
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strm.avail_in= 0;
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strm.next_in=Z_NULL;
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int err = inflateInit(&strm);
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ERR_FAIL_COND_V(err!=Z_OK,-1);
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strm.avail_in=p_src_size;
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strm.avail_out=p_dst_max_size;
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strm.next_in=(Bytef*)p_src;
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strm.next_out=p_dst;
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err = inflate(&strm,Z_FINISH);
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int total = strm.total_out;
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inflateEnd(&strm);
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ERR_FAIL_COND_V(err!=Z_STREAM_END,-1);
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return total;
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} break;
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}
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ERR_FAIL_V(-1);
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}
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