2 files changed, 0 insertions, 1104 deletions
diff --git a/src/engine/client/pnglite/pnglite.c b/src/engine/client/pnglite/pnglite.c
deleted file mode 100644
index b33f60ba..00000000
--- a/src/engine/client/pnglite/pnglite.c
+++ /dev/null
@@ -1,877 +0,0 @@
-/*  pnglite.c - pnglite library
-    For conditions of distribution and use, see copyright notice in pnglite.h
-*/
-#define DO_CRC_CHECKS 1
-#define USE_ZLIB 1
-
-#if USE_ZLIB
-#include <zlib.h>
-#else
-#include "zlite.h"
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "pnglite.h"
-
-
-
-static png_alloc_t png_alloc;
-static png_free_t png_free;
-
-static size_t file_read(png_t* png, void* out, size_t size, size_t numel)
-{
-	size_t result;
-	if(png->read_fun)
-	{
-		result = png->read_fun(out, size, numel, png->user_pointer);
-	}
-	else
-	{
-		if(!out)
-		{
-			result = fseek(png->user_pointer, (long)(size*numel), SEEK_CUR);
-		}
-		else
-		{
-			result = fread(out, size, numel, png->user_pointer);
-		}
-	}
-
-	return result;
-}
-
-static size_t file_write(png_t* png, void* p, size_t size, size_t numel)
-{
-	size_t result;
-
-	if(png->write_fun)
-	{
-		result = png->write_fun(p, size, numel, png->user_pointer);
-	}
-	else
-	{
-		result = fwrite(p, size, numel, png->user_pointer);
-	}
-
-	return result;
-}
-
-static int file_read_ul(png_t* png, unsigned *out)
-{
-	unsigned char buf[4];
-
-	if(file_read(png, buf, 1, 4) != 4)
-		return PNG_FILE_ERROR;
-
-	*out = (buf[0]<<24) | (buf[1]<<16) | (buf[2]<<8) | buf[3];
-
-	return PNG_NO_ERROR;
-}
-
-static int file_write_ul(png_t* png, unsigned in)
-{
-	unsigned char buf[4];
-
-	buf[0] = (in>>24) & 0xff;
-	buf[1] = (in>>16) & 0xff;
-	buf[2] = (in>>8) & 0xff;
-	buf[3] = (in) & 0xff;
-
-	if(file_write(png, buf, 1, 4) != 4)
-		return PNG_FILE_ERROR;
-
-	return PNG_NO_ERROR;
-}
-	
-
-static unsigned get_ul(unsigned char* buf)
-{
-	unsigned result;
-	unsigned char foo[4];
-
-	memcpy(foo, buf, 4);
-
-	result = (foo[0]<<24) | (foo[1]<<16) | (foo[2]<<8) | foo[3];
-
-	return result;
-}
-
-static unsigned set_ul(unsigned char* buf, unsigned in)
-{
-	buf[0] = (in>>24) & 0xff;
-	buf[1] = (in>>16) & 0xff;
-	buf[2] = (in>>8) & 0xff;
-	buf[3] = (in) & 0xff;
-
-	return PNG_NO_ERROR;
-}
-
-int png_init(png_alloc_t pngalloc, png_free_t pngfree)
-{
-	if(pngalloc)
-		png_alloc = pngalloc;
-	else
-		png_alloc = &malloc;
-
-	if(pngfree)
-		png_free = pngfree;
-	else
-		png_free = &free;
-
-	return PNG_NO_ERROR;
-}
-
-static int png_get_bpp(png_t* png)
-{
-	int bpp;
-
-	switch(png->color_type)
-	{
-	case PNG_GREYSCALE:
-		bpp = 1; break;
-	case PNG_TRUECOLOR:
-		bpp = 3; break;
-	case PNG_INDEXED:
-		bpp = 1; break;
-	case PNG_GREYSCALE_ALPHA:
-		bpp = 2; break;
-	case PNG_TRUECOLOR_ALPHA:
-		bpp = 4; break;
-	default:
-		return PNG_FILE_ERROR;
-	}
-
-	bpp *= png->depth/8;
-
-	return bpp;
-}
-
-static int png_read_ihdr(png_t* png)
-{
-	unsigned length;
-#if DO_CRC_CHECKS
-	unsigned orig_crc;
-	unsigned calc_crc;
-#endif
-	unsigned char ihdr[13+4];		 /* length should be 13, make room for type (IHDR) */
-
-	file_read_ul(png, &length);
-
-	if(length != 13)
-	{
-		printf("%d\n", length);
-		return PNG_CRC_ERROR;
-	}
-
-	if(file_read(png, ihdr, 1, 13+4) != 13+4)
-		return PNG_EOF_ERROR;
-#if DO_CRC_CHECKS
-	file_read_ul(png, &orig_crc);
-
-	calc_crc = crc32(0L, 0, 0);
-	calc_crc = crc32(calc_crc, ihdr, 13+4);
-
-	if(orig_crc != calc_crc)
-		return PNG_CRC_ERROR;
-#else
-	file_read_ul(png);
-#endif
-
-	png->width = get_ul(ihdr+4);
-	png->height = get_ul(ihdr+8);
-	png->depth = ihdr[12];
-	png->color_type = ihdr[13];
-	png->compression_method = ihdr[14];
-	png->filter_method = ihdr[15];
-	png->interlace_method = ihdr[16];
-
-	if(png->color_type == PNG_INDEXED)
-		return PNG_NOT_SUPPORTED;
-
-	if(png->depth != 8 && png->depth != 16)
-		return PNG_NOT_SUPPORTED;
-
-	if(png->interlace_method)
-		return PNG_NOT_SUPPORTED;
-	
-	return PNG_NO_ERROR;
-}
-
-static int png_write_ihdr(png_t* png)
-{
-	unsigned char ihdr[13+4];
-	unsigned char *p = ihdr;
-	unsigned crc;
-	
-	file_write(png, "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A", 1, 8);
-
-	file_write_ul(png, 13);
-    
-	*p = 'I';			p++;
-	*p = 'H';			p++;
-	*p = 'D';			p++;
-	*p = 'R';			p++;
-	set_ul(p, png->width);	p+=4;
-	set_ul(p, png->height);	p+=4;
-	*p = png->depth;			p++;
-	*p = png->color_type;	p++;
-	*p = 0;				p++;
-	*p = 0;				p++;
-	*p = 0;				p++;
-
-	file_write(png, ihdr, 1, 13+4);
-
-	crc = crc32(0L, 0, 0);
-	crc = crc32(crc, ihdr, 13+4);
-
-	file_write_ul(png, crc);
-
-	return PNG_NO_ERROR;
-}
-
-void png_print_info(png_t* png)
-{
-	printf("PNG INFO:\n");
-	printf("\twidth:\t\t%d\n", png->width);
-	printf("\theight:\t\t%d\n", png->height);
-	printf("\tdepth:\t\t%d\n", png->depth);
-	printf("\tcolor:\t\t");
-
-	switch(png->color_type)
-	{
-	case PNG_GREYSCALE:			printf("greyscale\n"); break;
-	case PNG_TRUECOLOR:			printf("truecolor\n"); break;
-	case PNG_INDEXED:			printf("palette\n"); break;
-	case PNG_GREYSCALE_ALPHA:	printf("greyscale with alpha\n"); break;
-	case PNG_TRUECOLOR_ALPHA:	printf("truecolor with alpha\n"); break;
-	default:					printf("unknown, this is not good\n"); break;
-	}
-
-	printf("\tcompression:\t%s\n",	png->compression_method?"unknown, this is not good":"inflate/deflate");
-	printf("\tfilter:\t\t%s\n",		png->filter_method?"unknown, this is not good":"adaptive");
-	printf("\tinterlace:\t%s\n",	png->interlace_method?"interlace":"no interlace");
-}
-
-int png_open_read(png_t* png, png_read_callback_t read_fun, void* user_pointer)
-{
-	char header[8];
-	int result;
-
-	png->read_fun = read_fun;
-	png->write_fun = 0;
-	png->user_pointer = user_pointer;
-
-	if(!read_fun && !user_pointer)
-		return PNG_WRONG_ARGUMENTS;
-
-	if(file_read(png, header, 1, 8) != 8)
-		return PNG_EOF_ERROR;
-
-	if(memcmp(header, "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A", 8) != 0)
-		return PNG_HEADER_ERROR;
-
-	result = png_read_ihdr(png);
-
-	png->bpp = (unsigned char)png_get_bpp(png);
-
-	return result;
-}
-
-int png_open_write(png_t* png, png_write_callback_t write_fun, void* user_pointer)
-{
-	png->write_fun = write_fun;
-	png->read_fun = 0;
-	png->user_pointer = user_pointer;
-
-	if(!write_fun && !user_pointer)
-		return PNG_WRONG_ARGUMENTS;
-
-	return PNG_NO_ERROR;
-}
-
-int png_open(png_t* png, png_read_callback_t read_fun, void* user_pointer)
-{
-	return png_open_read(png, read_fun, user_pointer);
-}
-
-int png_open_file_read(png_t *png, const char* filename)
-{
-	FILE* fp = fopen(filename, "rb");
-
-	if(!fp)
-		return PNG_FILE_ERROR;
-
-	return png_open_read(png, 0, fp);
-}
-
-int png_open_file_write(png_t *png, const char* filename)
-{
-	FILE* fp = fopen(filename, "wb");
-
-	if(!fp)
-		return PNG_FILE_ERROR;
-
-	return png_open_write(png, 0, fp);
-}
-
-int png_open_file(png_t *png, const char* filename)
-{
-	return png_open_file_read(png, filename);
-}
-
-int png_close_file(png_t* png)
-{
-	fclose(png->user_pointer);
-
-	return PNG_NO_ERROR;
-}
-
-static int png_init_deflate(png_t* png, unsigned char* data, int datalen)
-{
-	z_stream *stream;
-	png->zs = png_alloc(sizeof(z_stream));
-
-	stream = png->zs;
-
-	if(!stream)
-		return PNG_MEMORY_ERROR;
-
-	memset(stream, 0, sizeof(z_stream));
-
-	if(deflateInit(stream, Z_DEFAULT_COMPRESSION) != Z_OK)
-		return PNG_ZLIB_ERROR;
-
-	stream->next_in = data;
-	stream->avail_in = datalen;
-
-	return PNG_NO_ERROR;
-}
-
-static int png_init_inflate(png_t* png)
-{
-#if USE_ZLIB
-	z_stream *stream;
-	png->zs = png_alloc(sizeof(z_stream));
-#else
-	zl_stream *stream;
-	png->zs = png_alloc(sizeof(zl_stream));
-#endif
-
-	stream = png->zs;
-
-	if(!stream)
-		return PNG_MEMORY_ERROR;
-
-	
-
-#if USE_ZLIB
-	memset(stream, 0, sizeof(z_stream));
-	if(inflateInit(stream) != Z_OK)
-		return PNG_ZLIB_ERROR;
-#else
-	memset(stream, 0, sizeof(zl_stream));
-	if(z_inflateInit(stream) != Z_OK)
-		return PNG_ZLIB_ERROR;
-#endif
-
-	stream->next_out = png->png_data;
-	stream->avail_out = png->png_datalen;
-
-	return PNG_NO_ERROR;
-}
-
-static int png_end_deflate(png_t* png)
-{
-	z_stream *stream = png->zs;
-
-	if(!stream)
-		return PNG_MEMORY_ERROR;
-
-	deflateEnd(stream);
-
-	png_free(png->zs);
-
-	return PNG_NO_ERROR;
-}
-
-static int png_end_inflate(png_t* png)
-{
-#if USE_ZLIB
-	z_stream *stream = png->zs;
-#else
-	zl_stream *stream = png->zs;
-#endif
-
-	if(!stream)
-		return PNG_MEMORY_ERROR;
-
-#if USE_ZLIB
-	if(inflateEnd(stream) != Z_OK)
-#else
-	if(z_inflateEnd(stream) != Z_OK)
-#endif
-	{
-		printf("ZLIB says: %s\n", stream->msg);
-		return PNG_ZLIB_ERROR;
-	}
-
-	png_free(png->zs);
-
-	return PNG_NO_ERROR;
-}
-
-static int png_inflate(png_t* png, char* data, int len)
-{
-	int result;
-#if USE_ZLIB
-	z_stream *stream = png->zs;
-#else
-	zl_stream *stream = png->zs;
-#endif
-
-	if(!stream)
-		return PNG_MEMORY_ERROR;
-
-	stream->next_in = (unsigned char*)data;
-	stream->avail_in = len;
-	
-#if USE_ZLIB
-	result = inflate(stream, Z_SYNC_FLUSH);
-#else
-	result = z_inflate(stream);
-#endif
-
-	if(result != Z_STREAM_END && result != Z_OK)
-	{
-		printf("%s\n", stream->msg);
-		return PNG_ZLIB_ERROR;
-	}
-
-	if(stream->avail_in != 0)
-		return PNG_ZLIB_ERROR;
-
-	return PNG_NO_ERROR;
-}
-
-static int png_deflate(png_t* png, char* outdata, int outlen, int *outwritten)
-{
-	int result;
-
-	z_stream *stream = png->zs;
-
-
-	if(!stream)
-		return PNG_MEMORY_ERROR;
-
-	stream->next_out = (unsigned char*)outdata;
-	stream->avail_out = outlen;
-
-	result = deflate(stream, Z_SYNC_FLUSH);
-
-	*outwritten = outlen - stream->avail_out;
-
-	if(result != Z_STREAM_END && result != Z_OK)
-	{
-		printf("%s\n", stream->msg);
-		return PNG_ZLIB_ERROR;
-	}
-
-	return result;
-}
-
-static int png_write_idats(png_t* png, unsigned char* data)
-{
-	unsigned char *chunk;
-	unsigned long written;
-	unsigned long crc;
-	unsigned size = png->width * png->height * png->bpp + png->height;
-	
-	(void)png_init_deflate;
-	(void)png_end_deflate;
-	(void)png_deflate;
-
-	chunk = png_alloc(size);
-	memcpy(chunk, "IDAT", 4);
-	
-	written = size;
-	compress(chunk+4, &written, data, size);
-	
-	crc = crc32(0L, Z_NULL, 0);
-	crc = crc32(crc, chunk, written+4);
-	set_ul(chunk+written+4, crc);
-	file_write_ul(png, written);
-	file_write(png, chunk, 1, written+8);
-	png_free(chunk);
-
-	file_write_ul(png, 0);
-	file_write(png, "IEND", 1, 4);
-	crc = crc32(0L, (const unsigned char *)"IEND", 4);
-	file_write_ul(png, crc);
-	
-	return PNG_NO_ERROR;
-}
-
-static int png_read_idat(png_t* png, unsigned firstlen) 
-{
-	unsigned type = 0;
-	char *chunk;
-	int result;
-	unsigned length = firstlen;
-	unsigned old_len = length;
-
-#if DO_CRC_CHECKS
-	unsigned orig_crc;
-	unsigned calc_crc;
-#endif
-
-	chunk = png_alloc(firstlen); 
-
-	result = png_init_inflate(png);
-
-	if(result != PNG_NO_ERROR)
-	{
-		png_end_inflate(png);
-		png_free(chunk); 
-		return result;
-	}
-
-	do
-	{
-		if(file_read(png, chunk, 1, length) != length)
-		{
-			png_end_inflate(png);
-			png_free(chunk); 
-			return PNG_FILE_ERROR;
-		}
-
-#if DO_CRC_CHECKS
-		calc_crc = crc32(0L, Z_NULL, 0);
-		calc_crc = crc32(calc_crc, (unsigned char*)"IDAT", 4);
-		calc_crc = crc32(calc_crc, (unsigned char*)chunk, length);
-
-		file_read_ul(png, &orig_crc);
-
-		if(orig_crc != calc_crc)
-		{
-			result = PNG_CRC_ERROR;
-			break;
-		}
-#else
-		file_read_ul(png);
-#endif
-
-		result = png_inflate(png, chunk, length);
-
-		if(result != PNG_NO_ERROR) break;
-		
-		file_read_ul(png, &length);
-
-		if(length > old_len)
-		{
-			png_free(chunk); 
-			chunk = png_alloc(length); 
-			old_len = length;
-		}
-
-		if(file_read(png, &type, 1, 4) != 4)
-		{
-			result = PNG_FILE_ERROR;
-			break;
-		}
-
-	}while(type == *(unsigned int*)"IDAT");
-
-	if(type == *(unsigned int*)"IEND")
-		result = PNG_DONE;
-
-	png_free(chunk);
-	png_end_inflate(png);
-
-	return result;
-}
-
-static int png_process_chunk(png_t* png)
-{
-	int result = PNG_NO_ERROR;
-	unsigned type;
-	unsigned length;
-
-	file_read_ul(png, &length);
-
-	if(file_read(png, &type, 1, 4) != 4)
-		return PNG_FILE_ERROR;
-
-	if(type == *(unsigned int*)"IDAT")	/* if we found an idat, all other idats should be followed with no other chunks in between */
-	{
-		png->png_datalen = png->width * png->height * png->bpp + png->height;
-		png->png_data = png_alloc(png->png_datalen);
-		
-		if(!png->png_data)
-			return PNG_MEMORY_ERROR;
-
-		return png_read_idat(png, length);
-	}
-	else if(type == *(unsigned int*)"IEND")
-	{
-		return PNG_DONE;
-	}
-	else
-	{
-		file_read(png, 0, 1, length + 4);		/* unknown chunk */
-	}
-
-	return result;
-}
-
-static void png_filter_sub(int stride, unsigned char* in, unsigned char* out, int len)
-{
-	int i;
-	unsigned char a = 0;
-
-	for(i = 0; i < len; i++)
-	{
-		if(i >= stride)
-			a = out[i - stride];
-		
-		out[i] = in[i] + a;
-	}
-}
-
-static void png_filter_up(int stride, unsigned char* in, unsigned char* out, unsigned char* prev_line, int len)
-{
-	int i;
-
-	if(prev_line) 
-    { 
-        for(i = 0; i < len; i++) 
-            out[i] = in[i] + prev_line[i]; 
-    } 
-    else 
-        memcpy(out, in, len);
-}
-
-static void png_filter_average(int stride, unsigned char* in, unsigned char* out, unsigned char* prev_line, int len)
-{
-	int i;
-	unsigned char a = 0;
-	unsigned char b = 0;
-	unsigned int sum = 0;
-
-	for(i = 0; i < len; i++)
-	{
-		if(prev_line)
-			b = prev_line[i];
-
-		if(i >= stride)
-			a = out[i - stride];
-
-		sum = a;
-		sum += b;
-
-		out[i] = (char)(in[i] + sum/2);
-	}
-}
-
-static unsigned char png_paeth(unsigned char a, unsigned char b, unsigned char c)
-{
-	int p = (int)a + b - c;
-	int pa = abs(p - a);
-	int pb = abs(p - b);
-	int pc = abs(p - c);
-
-	int pr;
-
-	if(pa <= pb && pa <= pc)
-		pr = a;
-	else if(pb <= pc)
-		pr = b;
-	else
-		pr = c;
-
-	return (char)pr;
-}
-
-static void png_filter_paeth(int stride, unsigned char* in, unsigned char* out, unsigned char* prev_line, int len)
-{
-	int i;
-	unsigned char a;
-	unsigned char b;
-	unsigned char c;
-
-	for(i = 0; i < len; i++)
-	{
-		if(prev_line && i >= stride)
-		{
-			a = out[i - stride];
-			b = prev_line[i];
-			c = prev_line[i - stride];
-		}
-		else
-		{
-			if(prev_line)
-				b = prev_line[i];
-			else
-				b = 0;
-	
-			if(i >= stride)
-				a = out[i - stride];
-			else
-				a = 0;
-
-			c = 0;
-		}
-
-		out[i] = in[i] + png_paeth(a, b, c);
-	}
-}
-
-static int png_filter(png_t* png, unsigned char* data)
-{
-
-
-	return PNG_NO_ERROR;
-}
-
-static int png_unfilter(png_t* png, unsigned char* data)
-{
-	unsigned i;
-	unsigned pos = 0;
-	unsigned outpos = 0;
-	unsigned char *filtered = png->png_data;
-
-	int stride = png->bpp;
-
-	while(pos < png->png_datalen)
-	{
-		unsigned char filter = filtered[pos];
-
-		pos++;
-
-		if(png->depth == 16)
-		{
-			for(i = 0; i < png->width * stride; i+=2)
-			{
-				*(short*)(filtered+pos+i) = (filtered[pos+i] << 8) | filtered[pos+i+1];
-			}
-		}
-
-		switch(filter)
-		{
-		case 0: /* none */
-			memcpy(data+outpos, filtered+pos, png->width * stride);
-			break;
-		case 1: /* sub */
-			png_filter_sub(stride, filtered+pos, data+outpos, png->width * stride);
-			break;
-		case 2: /* up */
-			if(outpos)
-				png_filter_up(stride, filtered+pos, data+outpos, data + outpos - (png->width*stride), png->width*stride);
-			else
-				png_filter_up(stride, filtered+pos, data+outpos, 0, png->width*stride);
-			break;
-		case 3: /* average */
-			if(outpos)
-				png_filter_average(stride, filtered+pos, data+outpos, data + outpos - (png->width*stride), png->width*stride);
-			else
-				png_filter_average(stride, filtered+pos, data+outpos, 0, png->width*stride);
-			break;
-		case 4: /* paeth */
-			if(outpos)
-				png_filter_paeth(stride, filtered+pos, data+outpos, data + outpos - (png->width*stride), png->width*stride);
-			else
-				png_filter_paeth(stride, filtered+pos, data+outpos, 0, png->width*stride);
-			break;
-		default:
-			return PNG_UNKNOWN_FILTER;
-		}
-
-		outpos += png->width * stride;
-		pos += png->width * stride;
-	}
-
-	return PNG_NO_ERROR;
-}
-
-int png_get_data(png_t* png, unsigned char* data)
-{
-	int result = PNG_NO_ERROR;
-
-	while(result == PNG_NO_ERROR)
-	{
-		result = png_process_chunk(png);
-	}
-
-	if(result != PNG_DONE)
-	{
-		png_free(png->png_data); 
-		return result;
-	}
-
-	result = png_unfilter(png, data);
-
-	png_free(png->png_data); 
-
-	return result;
-}
-
-int png_set_data(png_t* png, unsigned width, unsigned height, char depth, int color, unsigned char* data)
-{
-	int i;
-	unsigned char *filtered;
-	png->width = width;
-	png->height = height;
-	png->depth = depth;
-	png->color_type = color;
-	png->bpp = png_get_bpp(png);
-
-	filtered = png_alloc(width * height * png->bpp + height);
-
-	for(i = 0; i < png->height; i++)
-	{
-		filtered[i*png->width*png->bpp+i] = 0;
-		memcpy(&filtered[i*png->width*png->bpp+i+1], data + i * png->width*png->bpp, png->width*png->bpp);
-	}
-
-	png_filter(png, filtered);
-	png_write_ihdr(png);
-	png_write_idats(png, filtered);
-	
-	png_free(filtered);
-	return PNG_NO_ERROR;
-}
-
-
-char* png_error_string(int error)
-{
-	switch(error)
-	{
-	case PNG_NO_ERROR:
-		return "No error";
-	case PNG_FILE_ERROR:
-		return "Unknown file error.";
-	case PNG_HEADER_ERROR:
-		return "No PNG header found. Are you sure this is a PNG?";
-	case PNG_IO_ERROR:
-		return "Failure while reading file.";
-	case PNG_EOF_ERROR:
-		return "Reached end of file.";
-	case PNG_CRC_ERROR:
-		return "CRC or chunk length error.";
-	case PNG_MEMORY_ERROR:
-		return "Could not allocate memory.";
-	case PNG_ZLIB_ERROR:
-		return "zlib reported an error.";
-	case PNG_UNKNOWN_FILTER:
-		return "Unknown filter method used in scanline.";
-	case PNG_DONE:
-		return "PNG done";
-	case PNG_NOT_SUPPORTED:
-		return "The PNG is unsupported by pnglite, too bad for you!";
-	case PNG_WRONG_ARGUMENTS:
-		return "Wrong combination of arguments passed to png_open. You must use either a read_function or supply a file pointer to use.";
-	default:
-		return "Unknown error.";
-	};
-}
diff --git a/src/engine/client/pnglite/pnglite.h b/src/engine/client/pnglite/pnglite.h
deleted file mode 100644
index f464c46b..00000000
--- a/src/engine/client/pnglite/pnglite.h
+++ /dev/null
@@ -1,227 +0,0 @@
-/*  pnglite.h - Interface for pnglite library
-	Copyright (c) 2007 Daniel Karling
-
-	This software is provided 'as-is', without any express or implied
-	warranty. In no event will the authors be held liable for any damages
-	arising from the use of this software.
-
-	Permission is granted to anyone to use this software for any purpose,
-	including commercial applications, and to alter it and redistribute it
-	freely, subject to the following restrictions:
-
-	1. The origin of this software must not be misrepresented; you must not
-	   claim that you wrote the original software. If you use this software
-	   in a product, an acknowledgment in the product documentation would be
-	   appreciated but is not required.  
-
-	2. Altered source versions must be plainly marked as such, and must not be
-	   misrepresented as being the original software.
-
-	3. This notice may not be removed or altered from any source
-	   distribution.
-
-	Daniel Karling
-	daniel.karling@gmail.com
- */
-
-
-#ifndef _PNGLITE_H_
-#define _PNGLITE_H_
-
-#ifdef __cplusplus
-extern "C"{
-#endif
-
-/*
-	Enumerations for pnglite.
-	Negative numbers are error codes and 0 and up are okay responses.
-*/
-
-enum
-{
-	PNG_DONE				= 1,
-	PNG_NO_ERROR			= 0,
-	PNG_FILE_ERROR			= -1,
-	PNG_HEADER_ERROR		= -2,
-	PNG_IO_ERROR			= -3,
-	PNG_EOF_ERROR			= -4,
-	PNG_CRC_ERROR			= -5,
-	PNG_MEMORY_ERROR		= -6,
-	PNG_ZLIB_ERROR			= -7,
-	PNG_UNKNOWN_FILTER		= -8,
-	PNG_NOT_SUPPORTED		= -9,
-	PNG_WRONG_ARGUMENTS		= -10
-};
-
-/*
-	The five different kinds of color storage in PNG files.
-*/
-
-enum
-{
-	PNG_GREYSCALE			= 0,
-	PNG_TRUECOLOR			= 2,
-	PNG_INDEXED				= 3,
-	PNG_GREYSCALE_ALPHA		= 4,
-	PNG_TRUECOLOR_ALPHA		= 6
-};
-
-/*
-	Typedefs for callbacks.
-*/
-
-typedef unsigned (*png_write_callback_t)(void* input, size_t size, size_t numel, void* user_pointer);
-typedef unsigned (*png_read_callback_t)(void* output, size_t size, size_t numel, void* user_pointer);
-typedef void (*png_free_t)(void* p);
-typedef void * (*png_alloc_t)(size_t s);
-
-typedef struct
-{
-	void*					zs;				/* pointer to z_stream */
-	png_read_callback_t		read_fun;
-	png_write_callback_t	write_fun;
-	void*					user_pointer;
-
-	unsigned char*			png_data;
-	unsigned				png_datalen;
-
-	unsigned				width;
-	unsigned				height;
-	unsigned char			depth;
-	unsigned char			color_type;
-	unsigned char			compression_method;
-	unsigned char			filter_method;
-	unsigned char			interlace_method;
-	unsigned char			bpp;
-}png_t;
-
-/*
-	Function: png_init
-
-	This function initializes pnglite. The parameters can be used to set your own memory allocation routines following these formats:
-
-	> void* (*custom_alloc)(size_t s)
-	> void (*custom_free)(void* p)
-	Parameters:
-		pngalloc - Pointer to custom allocation routine. If 0 is passed, malloc from libc will be used.
-		pngfree - Pointer to custom free routine. If 0 is passed, free from libc will be used.
-
-	Returns:
-		Always returns PNG_NO_ERROR.
-*/
-
-int png_init(png_alloc_t pngalloc, png_free_t pngfree);
-
-/*
-	Function: png_open_file
-
-	This function is used to open a png file with the internal file IO system. This function should be used instead of
-	png_open if no custom read function is used.
-
-	Parameters:
-		png - Empty png_t struct.
-		filename - Filename of the file to be opened.
-
-	Returns:
-		PNG_NO_ERROR on success, otherwise an error code.
-*/
-
-int png_open_file(png_t *png, const char* filename);
-
-int png_open_file_read(png_t *png, const char* filename);
-int png_open_file_write(png_t *png, const char* filename);
-
-/*
-	Function: png_open
-
-	This function reads or writes a png from/to the specified callback. The callbacks should be of the format:
-
-	> size_t (*png_write_callback_t)(void* input, size_t size, size_t numel, void* user_pointer);
-	> size_t (*png_read_callback_t)(void* output, size_t size, size_t numel, void* user_pointer).
-
-	Only one callback has to be specified. The read callback in case of PNG reading, otherwise the write callback.
-
-	Writing:
-	The callback will be called like fwrite.
-
-	Reading:
-	The callback will be called each time pnglite needs more data. The callback should read as much data as requested, 
-	or return 0. This should always be possible if the PNG is sane.	If the output-buffer is a null-pointer the callback 
-	should only skip ahead the specified number of elements. If the callback is a null-pointer the user_pointer will be 
-	treated as a file pointer (use png_open_file instead).
-
-	Parameters:
-		png - png_t struct
-		read_fun - Callback function for reading.
-		user_pointer - User pointer to be passed to read_fun.
-
-	Returns:
-		PNG_NO_ERROR on success, otherwise an error code.
-*/
-
-int png_open(png_t* png, png_read_callback_t read_fun, void* user_pointer);
-
-int png_open_read(png_t* png, png_read_callback_t read_fun, void* user_pointer);
-int png_open_write(png_t* png, png_write_callback_t write_fun, void* user_pointer);
-
-/*
-	Function: png_print_info
-
-	This function prints some info about the opened png file to stdout.
-
-	Parameters:
-		png - png struct to get info from.
-*/
-
-void png_print_info(png_t* png);
-
-/*
-	Function: png_error_string
-
-	This function translates an error code to a human readable string.
-
-	Parameters:
-		error - Error code.
-
-	Returns:
-		Pointer to string.
-*/
-
-char* png_error_string(int error);
-
-/*
-	Function: png_get_data
-
-	This function decodes the opened png file and stores the result in data. data should be big enough to hold the decoded png. Required size will be:
-	
-	> width*height*(bytes per pixel)
-
-	Parameters:
-		data - Where to store result.
-
-	Returns:
-		PNG_NO_ERROR on success, otherwise an error code.
-*/
-
-int png_get_data(png_t* png, unsigned char* data);
-
-int png_set_data(png_t* png, unsigned width, unsigned height, char depth, int color, unsigned char* data);
-
-/*
-	Function: png_close_file
-
-	Closes an open png file pointer. Should only be used when the png has been opened with png_open_file.
-
-	Parameters:
-		png - png to close.
-	
-	Returns:
-		PNG_NO_ERROR
-*/
-
-int png_close_file(png_t* png);
-
-#ifdef __cplusplus
-}
-#endif
-#endif