First code release

src/HMT-Extractor.c

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+/*
+ ============================================================================
+ Name        : HMT-Extractor.c
+ Author      : JackCarterSmith
+ Version     : 1.0
+ Copyright   : LGPL
+ Description : HMT textures extractor with enhanced function in C
+ ============================================================================
+ */
+
+#include "HMT_Parser.h"
+
+int main(int argc, char *argv[]) {
+	if (argc < 2) {
+		printf("No input file specified!\nCorrect syntax is:\n	HMT-Extractor <texture_file_hmt>\n");
+		return EXIT_FAILURE;
+	}
+	return EXIT_SUCCESS;
+}

src/HMT-Extractor.h

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+#ifndef HMT_EXTRACTOR_H_
+#define HMT_EXTRACTOR_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <zlib.h>
+#include <png.h>
+#include "HMT_Parser.h"
+#include "RS_images.h"
+
+int exportToPNM(FILE *f, RS_IMAGE *img);
+
+#endif

src/HMT_Parser.c

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+#include "HMT-Extractor.h"
+
+

src/HMT_Parser.h

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+#ifndef HMT_PARSER_H_
+#define HMT_PARSER_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "RS_images.h"
+
+/////////////////////////////
+///// Define HMT types //////
+/////////////////////////////
+
+/**
+ * @brief Material struct inside HMT file type
+ *
+ * Actual RE material struct:\n
+ *  4B material entry count MC\n
+ *	4B offset after material entries / offset to textures\n
+ *	MC * material entry (36B)\n
+ *	[\n
+ *	  2B int material/texture type:\n
+ *		  1 - material with texture\n
+ *		  2 - material without texture\n
+ *	  2B int texture index\n
+ *	  4B float (scale factor?)\n
+ *	  4B float (always 1.0)\n
+ *	  4B int zero\n
+ *	  4B int 0x0A\n
+ *	  16B name\n
+ *	]\n
+ *
+ *	@image html hmt_materialDef.png
+ */
+typedef struct HMTMaterial {
+	short type_;				/**< Material type:\n	1 = Material with texture\n	2 = Material without texture */
+	short texture_index;
+	float unknow1,unknow2;
+	int zero;
+	int hex_a;
+	char *name[16];
+}HMT_MATERIAL;
+
+/**
+ * @brief Texture struct inside HMT file type
+ *
+ * Actual RE texture struct:\n
+ *  4B int texcount Tc\n
+ *	TC * texture entry 52B\n
+ *	[\n
+ *	  4B int pixel offset\n
+ *	  28B zero\n
+ *	  4B int palette offset, 0 = no palette\n
+ *	  4B int texname offset\n
+ *	  2B int width\n
+ *	  2B int height\n
+ *	  8B texture format [\n
+ *	 	1B int : always 1?\n
+ *		1B int : bits per sample?\n
+ *		1B int : subtype:\n
+ *		   -0 - palette 16x3B RGB, 4bit per pixel\n
+ *		   -1 - 256x3B palette RGB, 8bit per pixel\n
+ *		   -3 - RGBA 32bpp\n
+ *		   -4 - greyscale, 4bpp\n
+ *		   -5 - grayscale, 8bpp\n
+ *		1B int ? 0, 0x40, 0x80\n
+ *		4B RGBA transparent color?\n
+ *	  ]\n
+ *	]\n
+ *
+ *	@image html hmt_textureDef.png
+ */
+typedef struct HMTTexture {
+	int data_offset;
+	int palette_offset;
+	int textureName_offset;
+	unsigned long width, height;
+	char *name[16];
+	RS_IMAGE image;
+}HMT_TEXTURE;
+
+/**
+ * @brief HMT file struct
+ */
+typedef struct HMTFile {
+	int material_count;
+	int texture_offset;
+	int texture_count;
+	HMT_MATERIAL *materials_list;
+	HMT_TEXTURE *textures_list;
+}HMT_FILE;
+
+
+/////////////////////////////
+///// Declare functions /////
+/////////////////////////////
+int exportToPNM(FILE *f, RS_IMAGE *img);
+
+#endif

src/RS_images.c

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+#include "RS_images.h"
+
+

src/RS_images.h

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+#ifndef RS_IMAGES_H_
+#define RS_IMAGES_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/////////////////////////////
+///// Define new types //////
+/////////////////////////////
+
+/**
+ * @brief Image definition from Rogue Squadron HMT files
+ */
+typedef struct RSImage {
+	int data_size; 						/**< Image bytes size */
+	int width, height;
+	unsigned char type_;				/**< Image type (0 = RBG/4bits per pixel, 1 = RBG/8bpp, 3 = RGBA/32bpp , 4 = grayscale/4bpp, 5 = grayscale/8bpp */
+	unsigned char sampleBits;			/**< Bits per samble */
+	int paletteEntries;
+	unsigned char *pixels;				/**< Image pixels list */
+	unsigned char *samples;				/**< Image samples list */
+	unsigned char palette[256][3];		/**< Image palette definition */
+}RS_IMAGE;
+
+
+/////////////////////////////
+///// Declare functions /////
+/////////////////////////////
+void Unpack4To8bit(unsigned char *src, unsigned char *dst, int sampling);
+void Unpack4bitTo24bitRGB(unsigned char *src, unsigned char *dst, int size, unsigned char pal[256][3]);
+void UseOddBytes(unsigned char *src, unsigned char *dst, int size);
+void DecodePixel(RS_IMAGE img);
+int WritePaletteToFile(RS_IMAGE img, FILE *f);
+int WriteSamplesToFile(RS_IMAGE img, FILE *f);
+
+#endif