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Diffstat (limited to 'src/utils.c')
| -rw-r--r-- | src/utils.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c new file mode 100644 index 00000000..8c5d7240 --- /dev/null +++ b/src/utils.c @@ -0,0 +1,127 @@ +/********************************************************************************************* +* +* raylib.utils +* +* Utils Functions Definitions +* +* Uses external lib: +* tinfl - zlib DEFLATE algorithm decompression lib +* +* 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() +//#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" + +// 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) + { + printf("Out of memory!\n"); + return NULL; + } + + // Decompress data + tempUncompSize = tinfl_decompress_mem_to_mem(pUncomp, (size_t)uncompSize, data, compSize, 1); + + if (tempUncompSize == -1) + { + printf("Decompression failed!\n"); + free(pUncomp); + return NULL; + } + + if (uncompSize != (int)tempUncompSize) + { + printf("WARNING! Expected uncompressed size do not match! Data may be corrupted!\n"); + printf(" -- Expected uncompressed size: %i\n", uncompSize); + printf(" -- Returned uncompressed size: %i\n", tempUncompSize); + } + + printf("Decompressed from %u bytes to %u bytes\n", (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!!! +}
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