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/*********************************************************************************************
*
* raylib.utils
*
* Utils Functions Definitions
*
* Uses external libs:
* tinfl - zlib DEFLATE algorithm decompression lib
* stb_image_write - PNG writting functions
*
* Copyright (c) 2013 Ramon Santamaria (Ray San - raysan@raysanweb.com)
*
* 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.
*
**********************************************************************************************/
#include "utils.h"
#include <stdlib.h> // malloc(), free()
#include <stdio.h> // printf(), fprintf()
#include <stdarg.h> // Used for functions with variable number of parameters (TraceLog())
//#include <string.h> // String management functions: strlen(), strrchr(), strcmp()
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h" // Create PNG file
#include "tinfl.c"
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
static FILE *logstream = NULL;
//----------------------------------------------------------------------------------
// Module Functions Definition - Utilities
//----------------------------------------------------------------------------------
// Data decompression function
// NOTE: Allocated data MUST be freed!
unsigned char *DecompressData(const unsigned char *data, unsigned long compSize, int uncompSize)
{
int tempUncompSize;
unsigned char *pUncomp;
// Allocate buffer to hold decompressed data
pUncomp = (mz_uint8 *)malloc((size_t)uncompSize);
// Check correct memory allocation
if (!pUncomp)
{
TraceLog(WARNING, "Out of memory while decompressing data");
}
else
{
// Decompress data
tempUncompSize = tinfl_decompress_mem_to_mem(pUncomp, (size_t)uncompSize, data, compSize, 1);
if (tempUncompSize == -1)
{
TraceLog(WARNING, "Data decompression failed");
free(pUncomp);
}
if (uncompSize != (int)tempUncompSize)
{
TraceLog(WARNING, "Expected uncompressed size do not match, data may be corrupted");
TraceLog(WARNING, " -- Expected uncompressed size: %i", uncompSize);
TraceLog(WARNING, " -- Returned uncompressed size: %i", tempUncompSize);
}
TraceLog(INFO, "Data decompressed successfully from %u bytes to %u bytes", (mz_uint32)compSize, (mz_uint32)tempUncompSize);
}
return pUncomp;
}
// Creates a bitmap (BMP) file from an array of pixel data
// NOTE: This function is not explicitly available to raylib users
void WriteBitmap(const char *fileName, unsigned char *imgData, int width, int height)
{
int filesize = 54 + 3*width*height;
unsigned char bmpFileHeader[14] = {'B','M', 0,0,0,0, 0,0, 0,0, 54,0,0,0}; // Standard BMP file header
unsigned char bmpInfoHeader[40] = {40,0,0,0, 0,0,0,0, 0,0,0,0, 1,0, 24,0}; // Standard BMP info header
bmpFileHeader[2] = (unsigned char)(filesize);
bmpFileHeader[3] = (unsigned char)(filesize>>8);
bmpFileHeader[4] = (unsigned char)(filesize>>16);
bmpFileHeader[5] = (unsigned char)(filesize>>24);
bmpInfoHeader[4] = (unsigned char)(width);
bmpInfoHeader[5] = (unsigned char)(width>>8);
bmpInfoHeader[6] = (unsigned char)(width>>16);
bmpInfoHeader[7] = (unsigned char)(width>>24);
bmpInfoHeader[8] = (unsigned char)(height);
bmpInfoHeader[9] = (unsigned char)(height>>8);
bmpInfoHeader[10] = (unsigned char)(height>>16);
bmpInfoHeader[11] = (unsigned char)(height>>24);
FILE *bmpFile = fopen(fileName, "wb"); // Define a pointer to bitmap file and open it in write-binary mode
// NOTE: fwrite parameters are: data pointer, size in bytes of each element to be written, number of elements, file-to-write pointer
fwrite(bmpFileHeader, sizeof(unsigned char), 14, bmpFile); // Write BMP file header data
fwrite(bmpInfoHeader, sizeof(unsigned char), 40, bmpFile); // Write BMP info header data
// Write pixel data to file
for (int y = 0; y < height ; y++)
{
for (int x = 0; x < width; x++)
{
fputc(imgData[(x*4)+2 + (y*width*4)], bmpFile);
fputc(imgData[(x*4)+1 + (y*width*4)], bmpFile);
fputc(imgData[(x*4) + (y*width*4)], bmpFile);
}
}
fclose(bmpFile); // Close bitmap file
}
// Creates a PNG image file from an array of pixel data
// NOTE: Uses stb_image_write
void WritePNG(const char *fileName, unsigned char *imgData, int width, int height)
{
stbi_write_png(fileName, width, height, 4, imgData, width*4); // It WORKS!!!
}
// Outputs a trace log message (INFO, ERROR, WARNING)
// NOTE: If a file has been init, output log is written there
void TraceLog(int msgType, const char *text, ...)
{
va_list args;
int traceDebugMsgs = 1;
#ifdef DO_NOT_TRACE_DEBUG_MSGS
traceDebugMsgs = 0;
#endif
// NOTE: If trace log file not set, output redirected to stdout
if (logstream == NULL) logstream = stdout;
switch(msgType)
{
case INFO: fprintf(logstream, "INFO: "); break;
case ERROR: fprintf(logstream, "ERROR: "); break;
case WARNING: fprintf(logstream, "WARNING: "); break;
case DEBUG: if (traceDebugMsgs) fprintf(logstream, "DEBUG: "); break;
default: break;
}
if ((msgType != DEBUG) || ((msgType == DEBUG) && (traceDebugMsgs)))
{
va_start(args, text);
vfprintf(logstream, text, args);
va_end(args);
fprintf(logstream, "\n");
}
if (msgType == ERROR) exit(1); // If ERROR message, exit program
}
// Open a trace log file (if desired)
void TraceLogOpen(const char *logFileName)
{
// stdout redirected to stream file
FILE *logstream = fopen(logFileName, "w");
if (logstream == NULL) TraceLog(WARNING, "Unable to open log file");
}
// Close the trace log file
void TraceLogClose()
{
if (logstream != NULL) fclose(logstream);
}
// Keep track of memory allocated
// NOTE: mallocType defines the type of data allocated
void RecordMalloc(int mallocType, int mallocSize, const char *msg)
{
// TODO: Investigate how to record memory allocation data...
// Maybe creating my own malloc function...
}
// Get the extension for a filename
const char *GetExtension(const char *fileName)
{
const char *dot = strrchr(fileName, '.');
if(!dot || dot == fileName) return "";
return (dot + 1);
}
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