Temporary push. Partial Bitmap handling added

Author: ptrstr

.gitignore

@@ -4,3 +4,6 @@
 # build stuff
 build/*
 !build/.keep
+
+# documentation
+doc/*

src/formats/bitmap/bitmap.c

@@ -0,0 +1,35 @@
+#include "bitmap.h"
+#include <stdlib.h>
+#include <string.h>
+
+unsigned char detectBitmap(unsigned char *buffer, unsigned long bufferSize) {
+	// TODO: Add Detection
+	return 0;
+}
+
+unsigned long *getBitmapOffsets(unsigned char *buffer, unsigned long bufferSize) {
+	unsigned long *offsets = (unsigned long*)calloc(2, sizeof(unsigned long));
+	if (!offsets) return NULL;
+	
+	// Extract pixel data start from header
+	memcpy(&offsets[0], buffer + 0x0A, 4);
+	
+	// Get end offset
+	// Get image width and height
+	unsigned long width = 0, height = 0;
+	memcpy(&width, buffer + 0x12, 4);
+	if (width % 4 != 0) width += 4 - (width % 4);
+	memcpy(&height, buffer + 0x16, 4);
+	
+	unsigned long pixels = width * height;
+	
+	// Get bits per pixel
+	unsigned short bitsPerPixel = 0;
+	memcpy(&bitsPerPixel, buffer + 0x1C, 2);
+	
+	// Get end offset
+	unsigned long pixelDataBytes = pixels * (bitsPerPixel / 8);
+	offsets[1] = offsets[0] + pixelDataBytes;
+	
+	return offsets;
+}

src/formats/bitmap/bitmap.h

@@ -0,0 +1,4 @@
+#pragma once
+
+unsigned char detectBitmap(unsigned char *buffer, unsigned long bufferSize);
+unsigned long *getBitmqpOffsets(unsigned char *buffer, unsigned long bufferSize);

src/formats/formats.c

@@ -2,27 +2,25 @@
 #include <stdlib.h>
 #include <string.h>
 #include "wav/wav.h"
+#include "bitmap/bitmap.h"
 
 FORMAT getFormat(unsigned char *buffer, unsigned long bufferSize) {
 	if (detectWAV(buffer, bufferSize)) return WAV;
+	if (detectBitmap(buffer, bufferSize)) return BITMAP;
 	return NULLFORMAT;
 }
 
 unsigned long *getFormatOffsets(unsigned char *buffer, unsigned long bufferSize, FORMAT format) {
-	unsigned long *offsets = (unsigned long*)calloc(2, sizeof(unsigned long));
-	if (!offsets) return NULL;
+	unsigned long *offsets = NULL;
 
-	unsigned long *tmpOffsets;
 	switch (format) {
 		case WAV:
-			tmpOffsets = getWAVOffsets(buffer, bufferSize);
+			offsets = getWAVOffsets(buffer, bufferSize);
+		case BITMAP:
+			offsets = getBitmapOffsets(buffer, bufferSize);
 	}
 
-	if (!tmpOffsets) {
-		return NULL;
-	}
+	if (!offsets) return NULL;
 
-	memcpy(offsets, tmpOffsets, 2 * sizeof(unsigned long));
-	free(tmpOffsets);
 	return offsets;
 }

src/formats/formats.h

@@ -2,7 +2,8 @@
 
 typedef enum {
 	NULLFORMAT,
-	WAV
+	WAV,
+	BITMAP
 } FORMAT;
 
 FORMAT getFormat(unsigned char *buffer, unsigned long bufferSize);