First commit

8 files changed, 904 insertions, 0 deletions

diff --git a/README b/README
new file mode 100644
index 000000000..6a5430aa6
--- /dev/null
+++ b/README
@@ -0,0 +1,7 @@
+To compile and execute
+
+gcc example1.c ksvsk.c murmur3.c -Wall -I /usr/local/include/freetype2/ -lfreetype -o example1 
+./example1 <font_file> <pt_size> <character>
+
+gcc example2.c ksvsk.c murmur3.c -Wall -I /usr/local/include/freetype2/ -lfreetype -o example2
+./example2 <font_file> <pt_size> 
\ No newline at end of file
diff --git a/bitmap.c b/bitmap.c
new file mode 100644
index 000000000..ab1511810
--- /dev/null
+++ b/bitmap.c
@@ -0,0 +1,281 @@
+#include "bitmap.h"
+
+HASH_128 * Generate_Hash_x64_128(FT_Bitmap * bitmap, HASH_128 * murmur)
+{    
+    int seed = 99; // Dont change
+
+    MurmurHash3_x64_128(bitmap->buffer, (bitmap->pitch * bitmap->rows), seed, murmur->hash);
+
+    return murmur;
+}
+
+HASH_128 * Generate_Hash_x86_128(FT_Bitmap * bitmap, HASH_128 * murmur)
+{    
+    int seed = 99; // Dont change
+
+    MurmurHash3_x86_128(bitmap->buffer, (bitmap->pitch * bitmap->rows), seed, murmur->hash);
+
+    return murmur;
+}
+
+HASH_32 * Generate_Hash_x86_32(FT_Bitmap * bitmap, HASH_32 * murmur)
+{    
+    int seed = 99; // Dont change
+
+    MurmurHash3_x86_32(bitmap->buffer, (bitmap->pitch * bitmap->rows), seed, murmur->hash);
+
+    return murmur;
+}
+
+int Get_Padding( FT_Bitmap*	bitmap ){
+
+	int rem;
+	if (bitmap->pixel_mode == 6)
+	{
+		rem = ( 3 * bitmap->width ) % 4;
+	}else{
+		rem = ( bitmap->width ) % 4;
+	}
+	
+	if (!rem )
+    {
+        return rem;
+    }
+        return  (4 - rem);
+}
+
+int Get_Bits_Per_Pixel ( unsigned char PIXEL_MODE) {
+	if (PIXEL_MODE < 5)
+	{
+		return BITS_PER_PIXEL_GRAY;
+	}else{
+		return BITS_PER_PIXEL_LCD;
+	}
+}
+
+void Write_Bitmap_Header (FT_Bitmap * bitmap ) { 
+          
+    FILE *fp = fopen("test.bmp","w");     // Bitmap File 
+    HEADER *header  = ( HEADER* ) calloc( 1 , sizeof( HEADER ));
+
+    unsigned char   pixel_mode = ( bitmap->pixel_mode );
+    FT_UInt			image_width;
+    FT_UInt			image_rows;
+    FT_UInt			color_table_size = 0;
+
+    switch(pixel_mode){
+
+    	case 5 :	image_width = bitmap->width / 3; 		// LCD
+    				image_rows 	= bitmap->rows;
+    				break;
+
+    	case 6 :	image_width = bitmap->width;			// LCD_V
+    				image_rows 	= bitmap->rows / 3;
+    				break;
+
+    	default	:   image_width = bitmap->width;			// MONO and GRAY
+    				image_rows 	= bitmap->rows;
+    				color_table_size = 4* 256;
+    				break;
+    }
+
+    FT_Int  image_size; 
+    image_size = (image_rows * image_width );
+
+    header->file_header.type                      = 0x4D42;       
+    header->file_header.file_size                 = sizeof(HEADER) + color_table_size + image_size;
+    header->file_header.file_offset               = sizeof(HEADER) + color_table_size;
+
+    header->info_header.info_header_size          = sizeof(BMP_INFO_HEADER);
+    header->info_header.width                     = image_width ;
+    header->info_header.height                    = image_rows;
+    header->info_header.planes                    = PLANES;
+    header->info_header.bits_per_pixel            = Get_Bits_Per_Pixel( bitmap->pixel_mode );
+    header->info_header.compression               = COMPRESSION;
+    header->info_header.image_size                = image_size;
+    header->info_header.y_pixels_per_meter        = Y_PIXELS_PER_METER ;
+    header->info_header.x_pixels_per_meter        = X_PIXELS_PER_METER ;
+    header->info_header.used_colors               = USED_COLORS;
+    header->info_header.important_colors          = IMPORTANT_COLORS;
+
+    fwrite (header, 1, sizeof(HEADER),fp);   
+    free(header);
+    fclose(fp);
+}
+
+void Write_Bitmap_Data_LCD_RGB( FT_Bitmap * bitmap ){
+
+    char value;
+
+    FILE *fp = fopen("test.bmp","a");     
+
+    for (int i = bitmap->rows - 1; i >= 0  ; --i)
+    {
+        for (int j = 2; j < bitmap->width; j = j+3) 
+        {
+            value = 0xff - bitmap->buffer[( i * bitmap->pitch) + j];
+            fwrite (&value, 1, 1,fp);
+
+            value = 0xff - bitmap->buffer[( i * bitmap->pitch) + j - 1];
+            fwrite (&value, 1, 1,fp);
+
+            value = 0xff - bitmap->buffer[( i * bitmap->pitch) + j - 2];
+            fwrite (&value, 1, 1,fp);
+        }
+        for (int k = 0; k < Get_Padding(bitmap); ++k)
+        {
+            value = 0xff;
+            fwrite (&value, 1, 1,fp);           
+        }
+    }
+
+    fclose(fp);
+} 
+
+void Write_Bitmap_Data_LCD_BGR( FT_Bitmap * bitmap ){
+
+    char value;
+
+    FILE *fp = fopen("test.bmp","a");     
+
+    for (int i = bitmap->rows - 1; i >= 0  ; --i)
+    {
+        for (int j = 0; j < bitmap->width; j = j+3) 
+        {
+            value = 0xff - bitmap->buffer[( i * bitmap->pitch) + j];
+            fwrite (&value, 1, 1,fp);
+
+            value = 0xff - bitmap->buffer[( i * bitmap->pitch) + j + 1];
+            fwrite (&value, 1, 1,fp);
+
+            value = 0xff - bitmap->buffer[( i * bitmap->pitch) + j + 2];
+            fwrite (&value, 1, 1,fp);
+        }
+        for (int k = 0; k < Get_Padding(bitmap); ++k)
+        {
+            value = 0xff;
+            fwrite (&value, 1, 1,fp);           
+        }
+    }
+
+    fclose(fp);
+} 
+
+void Write_Bitmap_Data_LCD_V_BGR (FT_Bitmap * bitmap) {            
+
+    FILE *fp = fopen("test.bmp","a"); 
+
+    int i,j,k,step;
+    char value;
+    step = bitmap->rows - 1;
+
+    while ( step > 0 ){
+
+        for (i = 0; i < bitmap->width; i++)                   
+        {
+            for (j = step - 2; j <= step; ++j) 
+            {
+                value = 0xff - bitmap->buffer[(j * bitmap->pitch) + i];
+                fwrite (&value, 1, 1,fp);
+            }
+        }
+        for (k = 0; k < Get_Padding(bitmap); ++k)
+        {
+            value = 0xff;
+            fwrite (&value, 1, 1,fp);
+        }
+        step = step - 3;
+    }
+
+    fclose(fp);
+} 
+
+void Write_Bitmap_Data_LCD_V_RGB (FT_Bitmap * bitmap) {            
+
+    FILE *fp = fopen("test.bmp","a"); 
+
+    int i,j,k,step;
+    char value;
+    step = bitmap->rows - 1;
+
+    while ( step > 0 ){
+
+        for (i = 0; i < bitmap->width; i++)                   
+        {
+            for (j = step; j > step - 3; --j) 
+            {
+                value = 0xff - bitmap->buffer[(j * bitmap->pitch) + i];
+                fwrite (&value, 1, 1,fp);
+            }
+        }
+        for (k = 0; k < Get_Padding(bitmap); ++k)
+        {
+            value = 0xff;
+            fwrite (&value, 1, 1,fp);
+        }
+        step = step - 3;
+    }
+
+    fclose(fp);
+} 
+
+void Write_Bitmap_Data_MONO (FT_Bitmap * bitmap) {            
+
+    FILE *fp = fopen("test.bmp","a");
+
+    int i,j;
+    unsigned char value;
+    for ( i = 0; i < 256; ++i)
+    {
+        value = i;
+        fwrite (&value,1,1,fp);
+        fwrite (&value,1,1,fp);
+        fwrite (&value,1,1,fp);
+        value = 0;
+        fwrite (&value,1,1,fp);
+    }
+
+    for ( i = bitmap->rows - 1; i >= 0  ; --i)
+    {
+        for ( j = 0; j < bitmap->pitch; ++j)
+        {
+            if ( bitmap->buffer[( i * bitmap->pitch) + j] != 0x00 ){
+                value = 0x00; // remember taking reverse
+                fwrite (&value, 1, 1,fp);
+            }else{
+                value = 0xff;
+                fwrite (&value, 1, 1,fp);
+            }
+        }
+    }
+
+    fclose(fp);
+} 
+
+void Write_Bitmap_Data_GRAY(FT_Bitmap * bitmap) {            
+
+    FILE *fp = fopen("test.bmp","a");
+    int i,j;
+
+    unsigned char value;
+    for ( i = 0; i < 256; ++i)
+    {
+        value = i;
+        fwrite (&value,1,1,fp);
+        fwrite (&value,1,1,fp);
+        fwrite (&value,1,1,fp);
+        value = 0;
+        fwrite (&value,1,1,fp);
+    }
+
+    for ( j = bitmap->rows - 1; j >= 0; --j)
+    {
+        for ( i = 0; i < bitmap->pitch; ++i)
+        {
+            value = 255 - bitmap->buffer[j * bitmap->pitch + i];
+            fwrite(&value,1,1,fp);
+        }
+    }
+
+    fclose(fp);
+}
\ No newline at end of file
diff --git a/bitmap.h b/bitmap.h
new file mode 100644
index 000000000..43e7af15b
--- /dev/null
+++ b/bitmap.h
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <ft2build.h>
+#include "murmur3.h"            // MurmurHash3_x64_128 header file
+
+#include FT_FREETYPE_H
+#include FT_MODULE_H
+#include FT_LCD_FILTER_H
+#include FT_BITMAP_H
+
+#define BITS_PER_PIXEL_MONO 1   // Constants for the Bitmap Header
+#define BITS_PER_PIXEL_GRAY 8
+#define BITS_PER_PIXEL_LCD 24
+
+#define PLANES 1                // Constants for the Bitmap Header
+#define COMPRESSION 0
+#define X_PIXELS_PER_METER 0
+#define Y_PIXELS_PER_METER 0
+#define USED_COLORS 0
+#define IMPORTANT_COLORS 0
+//-------------------------------------------------------------------------------
+#pragma pack(push,1)
+
+typedef struct{                 // Bitmap FILE Header
+
+    FT_UInt16 type;
+    FT_UInt32 file_size;
+    FT_UInt32 reserved;
+    FT_UInt32 file_offset;
+
+} BMP_FILE_HEADER;
+
+typedef struct{                 // Bitmap INFO Header
+
+    FT_UInt32 info_header_size;
+    FT_UInt32 width;
+    FT_UInt32 height;
+    FT_UInt16 planes;
+    FT_UInt16 bits_per_pixel;
+    FT_UInt32 compression;
+    FT_UInt32 image_size;
+    FT_UInt32 y_pixels_per_meter;
+    FT_UInt32 x_pixels_per_meter;
+    FT_UInt32 used_colors;
+    FT_UInt32 important_colors;
+
+} BMP_INFO_HEADER;
+
+typedef struct {                 // Bitmap Header  
+
+    BMP_FILE_HEADER file_header;   
+    BMP_INFO_HEADER info_header;
+
+} HEADER;
+
+//------------------------------------------------------------------------------
+typedef struct {                // To store 32bit Hash
+    FT_UInt32 hash[1];
+}HASH_32;
+
+typedef struct {                // To store 128bit Hash
+    FT_UInt32 hash[4];
+}HASH_128;
+
+#pragma pack(pop)
+
+//-------------------------------------------------------------------------------
+
+HASH_32 * Generate_Hash_x86_32(FT_Bitmap * bitmap, HASH_32 * murmur);
+HASH_128 * Generate_Hash_x86_128(FT_Bitmap * bitmap, HASH_128 * murmur);
+HASH_128 * Generate_Hash_x64_128(FT_Bitmap * bitmap, HASH_128 * murmur);
+
+//-------------------------------------------------------------------------------
+
+int Get_Padding                     (FT_Bitmap * bitmap);          
+
+int Get_Bits_Per_Pixel              ( unsigned char PIXEL_MODE );
+
+void Write_Bitmap_Header            (FT_Bitmap * bitmap );
+
+void Write_Bitmap_Data_MONO         (FT_Bitmap * bitmap);
+void Write_Bitmap_Data_GRAY         (FT_Bitmap * bitmap);
+void Write_Bitmap_Data_LCD_BGR      (FT_Bitmap * bitmap);
+void Write_Bitmap_Data_LCD_RGB      (FT_Bitmap * bitmap);
+void Write_Bitmap_Data_LCD_V_RGB    (FT_Bitmap * bitmap);
+void Write_Bitmap_Data_LCD_V_BGR    (FT_Bitmap * bitmap);
diff --git a/example1.c b/example1.c
new file mode 100644
index 000000000..9bc61216d
--- /dev/null
+++ b/example1.c
@@ -0,0 +1,98 @@
+// This example uses the FreeType rendering library to produce 
+// LCD rendered bitmap (RGB) for the glyphs of a font
+// Also gives the MurmurHash3 hash value of the bitmap rendered.
+
+#include "bitmap.h"
+
+int main(int argc, char const *argv[])
+{
+    FT_Library      library;
+    FT_Face         face;
+    FT_GlyphSlot    slot;
+    FT_Bitmap*		bitmap;
+    FT_Error        error;
+
+    const char*     font_file; 		// Arguments
+    FT_UInt32       size;
+    FT_UInt         glyph_index;
+    const char*     character;
+
+    if (argc != 4)
+    {
+        printf("\nTo render a RGB bitmap of a glyph to be displayed on an \n");
+        printf("LCD surface and to generate the 128bit MurmurHash3 hash \n\n");
+
+        printf("Filter used is FT_LCD_FILTER_DEFAULT\n\n");
+
+   		printf("Usage	./<exe> <font_file> <pt_size> <character>\n\n");
+
+        exit(0);
+    }
+
+    font_file = 	argv[1];
+    size =  		atoi(argv[2]);  
+    character =  	argv[3];
+
+    error = FT_Init_FreeType( &library );
+    if(error){
+        printf("Error while initialising library\n");
+    }
+
+    error = FT_Library_SetLcdFilter( library,
+                                     FT_LCD_FILTER_DEFAULT );
+    if(error){
+        printf("Error while setting LCD filter\n");
+    }
+
+    error = FT_New_Face( library, 
+                         font_file, 
+                         0, 
+                         &face );
+    if(error){
+        printf("Error loading new face\n");
+    }
+
+    error = FT_Set_Char_Size( face,
+                              size * 64, 
+                              0, 
+                              100,
+                              0 );
+    if(error){
+        printf("Error setting character size\n");
+    }
+
+    glyph_index = FT_Get_Char_Index( face, *character );
+
+    slot = face->glyph;
+
+    error = FT_Load_Glyph( face,
+                           glyph_index, 
+                           FT_LOAD_NO_BITMAP | FT_LOAD_TARGET_LCD );
+    if(error){
+        printf("Error loading glyph\n");
+    }
+
+    FT_Render_Glyph( slot, 
+                     FT_RENDER_MODE_LCD);
+    if(error){
+        printf("Error rendering the glyph\n");
+    }
+
+    bitmap = &slot->bitmap;
+
+    Write_Bitmap_Header(bitmap);
+    Write_Bitmap_Data_LCD_RGB(bitmap);
+    
+    HASH_128 *  murmur = (HASH_128 *) malloc(sizeof(HASH_128)) ;
+    murmur = Generate_Hash_x64_128(bitmap,murmur);	// using the x64_128 function of the hash
+    
+    printf("%08x %08x %08x %08x\n", murmur->hash[0], // Print hash
+                                    murmur->hash[1],
+                                    murmur->hash[2], 
+                                    murmur->hash[3]); 
+    
+    FT_Done_Face    ( face );
+    FT_Done_FreeType( library );
+
+    return 0;
+}
\ No newline at end of file
diff --git a/example2.c b/example2.c
new file mode 100644
index 000000000..4fa791075
--- /dev/null
+++ b/example2.c
@@ -0,0 +1,93 @@
+// This example uses the FreeType rendering library to print 
+// the MurmurHash3 hash value of the 8-bit anti-aliased
+// bitmaps of all the glyphs in the font.
+
+#include "bitmap.h" // The header file
+
+int main(int argc, char const *argv[])
+{
+    FT_Library      library;
+    FT_Face         face;
+    FT_GlyphSlot    slot;
+    FT_Bitmap*      bitmap;
+
+    FT_Error        error;
+
+    const char*     filename;
+    FT_UInt32       size; 
+
+    if (argc != 3)
+    {
+    	printf("This program prints the hashes of 8-bit grayscale\n"); 
+    	printf("anti-aliased bitmaps of all the glyphs in a font\n\n");
+
+    	printf("Usage ./<exe> <font_file> <pt_size>\n\n");
+    	exit(0);
+    }
+
+
+    filename = argv[1];
+    size =  atoi(argv[2]); 
+
+    error = FT_Init_FreeType( &library );
+    if(error){
+        printf("Error while initialising library\n");
+    }
+
+    error = FT_New_Face( library, 
+                         filename, 
+                         0, 
+                         &face );
+    if(error){
+        printf("Error loading new face\n");
+    }
+
+    error = FT_Set_Char_Size( face,
+                              size * 64,
+                              0, 
+                              100, 
+                              0 );
+    if(error){
+        printf("Error setting character size\n");
+    }
+
+    slot = face->glyph;
+
+    for (int i = 0; i < face->num_glyphs; ++i)      // Loop
+    {
+	    error = FT_Load_Glyph( face,
+	                            i, 
+	                            FT_LOAD_DEFAULT);
+	    if(error){
+	        printf("Error loading glyph\n");
+	    }
+
+	    FT_Render_Glyph( slot, 
+	                     FT_RENDER_MODE_NORMAL);
+	    if(error){
+	        printf("Error rendering the glyph\n");
+	    }
+	    	
+		bitmap = &slot->bitmap;
+
+		if (bitmap->width == 0|| bitmap->rows == 0)
+		{
+			printf("%d - Empty Glyph\n",i);
+			continue;
+		}
+
+	    HASH_128 *  murmur = (HASH_128 *) malloc(sizeof(HASH_128)) ;
+	    murmur = Generate_Hash_x64_128(bitmap,murmur);
+
+	    printf("%d - %08x %08x %08x %08x\n",i,
+                                            murmur->hash[0], 
+	                                        murmur->hash[1],
+	                                   	    murmur->hash[2], 
+	                                        murmur->hash[3]); 
+    }
+
+    FT_Done_Face    ( face );
+    FT_Done_FreeType( library );
+
+    return 0;
+}
\ No newline at end of file
diff --git a/murmur3.c b/murmur3.c
new file mode 100644
index 000000000..484ebfd03
--- /dev/null
+++ b/murmur3.c
@@ -0,0 +1,312 @@
+//-----------------------------------------------------------------------------
+// Note - The x86 and x64 versions do _not_ produce the same results, as the
+// algorithms are optimized for their respective platforms. You can still
+// compile and run any of them on any platform, but your performance with the
+// non-native version will be less than optimal.
+
+#include "murmur3.h"
+
+//-----------------------------------------------------------------------------
+// Platform-specific functions and macros
+
+#ifdef __GNUC__
+#define FORCE_INLINE __attribute__((always_inline)) inline
+#else
+#define FORCE_INLINE inline
+#endif
+
+static FORCE_INLINE uint32_t rotl32 ( uint32_t x, int8_t r )
+{
+  return (x << r) | (x >> (32 - r));
+}
+
+static FORCE_INLINE uint64_t rotl64 ( uint64_t x, int8_t r )
+{
+  return (x << r) | (x >> (64 - r));
+}
+
+#define	ROTL32(x,y)	rotl32(x,y)
+#define ROTL64(x,y)	rotl64(x,y)
+
+#define BIG_CONSTANT(x) (x##LLU)
+
+//-----------------------------------------------------------------------------
+// Block read - if your platform needs to do endian-swapping or can only
+// handle aligned reads, do the conversion here
+
+#define getblock(p, i) (p[i])
+
+//-----------------------------------------------------------------------------
+// Finalization mix - force all bits of a hash block to avalanche
+
+static FORCE_INLINE uint32_t fmix32 ( uint32_t h )
+{
+  h ^= h >> 16;
+  h *= 0x85ebca6b;
+  h ^= h >> 13;
+  h *= 0xc2b2ae35;
+  h ^= h >> 16;
+
+  return h;
+}
+
+//----------
+
+static FORCE_INLINE uint64_t fmix64 ( uint64_t k )
+{
+  k ^= k >> 33;
+  k *= BIG_CONSTANT(0xff51afd7ed558ccd);
+  k ^= k >> 33;
+  k *= BIG_CONSTANT(0xc4ceb9fe1a85ec53);
+  k ^= k >> 33;
+
+  return k;
+}
+
+//-----------------------------------------------------------------------------
+
+void MurmurHash3_x86_32 ( const void * key, int len,
+                          uint32_t seed, void * out )
+{
+  const uint8_t * data = (const uint8_t*)key;
+  const int nblocks = len / 4;
+  int i;
+
+  uint32_t h1 = seed;
+
+  uint32_t c1 = 0xcc9e2d51;
+  uint32_t c2 = 0x1b873593;
+
+  //----------
+  // body
+
+  const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);
+
+  for(i = -nblocks; i; i++)
+  {
+    uint32_t k1 = getblock(blocks,i);
+
+    k1 *= c1;
+    k1 = ROTL32(k1,15);
+    k1 *= c2;
+    
+    h1 ^= k1;
+    h1 = ROTL32(h1,13); 
+    h1 = h1*5+0xe6546b64;
+  }
+
+  //----------
+  // tail
+
+  const uint8_t * tail = (const uint8_t*)(data + nblocks*4);
+
+  uint32_t k1 = 0;
+
+  switch(len & 3)
+  {
+  case 3: k1 ^= tail[2] << 16;
+  case 2: k1 ^= tail[1] << 8;
+  case 1: k1 ^= tail[0];
+          k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
+  };
+
+  //----------
+  // finalization
+
+  h1 ^= len;
+
+  h1 = fmix32(h1);
+
+  *(uint32_t*)out = h1;
+} 
+
+//-----------------------------------------------------------------------------
+
+void MurmurHash3_x86_128 ( const void * key, const int len,
+                           uint32_t seed, void * out )
+{
+  const uint8_t * data = (const uint8_t*)key;
+  const int nblocks = len / 16;
+  int i;
+
+  uint32_t h1 = seed;
+  uint32_t h2 = seed;
+  uint32_t h3 = seed;
+  uint32_t h4 = seed;
+
+  uint32_t c1 = 0x239b961b; 
+  uint32_t c2 = 0xab0e9789;
+  uint32_t c3 = 0x38b34ae5; 
+  uint32_t c4 = 0xa1e38b93;
+
+  //----------
+  // body
+
+  const uint32_t * blocks = (const uint32_t *)(data + nblocks*16);
+
+  for(i = -nblocks; i; i++)
+  {
+    uint32_t k1 = getblock(blocks,i*4+0);
+    uint32_t k2 = getblock(blocks,i*4+1);
+    uint32_t k3 = getblock(blocks,i*4+2);
+    uint32_t k4 = getblock(blocks,i*4+3);
+
+    k1 *= c1; k1  = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
+
+    h1 = ROTL32(h1,19); h1 += h2; h1 = h1*5+0x561ccd1b;
+
+    k2 *= c2; k2  = ROTL32(k2,16); k2 *= c3; h2 ^= k2;
+
+    h2 = ROTL32(h2,17); h2 += h3; h2 = h2*5+0x0bcaa747;
+
+    k3 *= c3; k3  = ROTL32(k3,17); k3 *= c4; h3 ^= k3;
+
+    h3 = ROTL32(h3,15); h3 += h4; h3 = h3*5+0x96cd1c35;
+
+    k4 *= c4; k4  = ROTL32(k4,18); k4 *= c1; h4 ^= k4;
+
+    h4 = ROTL32(h4,13); h4 += h1; h4 = h4*5+0x32ac3b17;
+  }
+
+  //----------
+  // tail
+
+  const uint8_t * tail = (const uint8_t*)(data + nblocks*16);
+
+  uint32_t k1 = 0;
+  uint32_t k2 = 0;
+  uint32_t k3 = 0;
+  uint32_t k4 = 0;
+
+  switch(len & 15)
+  {
+  case 15: k4 ^= tail[14] << 16;
+  case 14: k4 ^= tail[13] << 8;
+  case 13: k4 ^= tail[12] << 0;
+           k4 *= c4; k4  = ROTL32(k4,18); k4 *= c1; h4 ^= k4;
+
+  case 12: k3 ^= tail[11] << 24;
+  case 11: k3 ^= tail[10] << 16;
+  case 10: k3 ^= tail[ 9] << 8;
+  case  9: k3 ^= tail[ 8] << 0;
+           k3 *= c3; k3  = ROTL32(k3,17); k3 *= c4; h3 ^= k3;
+
+  case  8: k2 ^= tail[ 7] << 24;
+  case  7: k2 ^= tail[ 6] << 16;
+  case  6: k2 ^= tail[ 5] << 8;
+  case  5: k2 ^= tail[ 4] << 0;
+           k2 *= c2; k2  = ROTL32(k2,16); k2 *= c3; h2 ^= k2;
+
+  case  4: k1 ^= tail[ 3] << 24;
+  case  3: k1 ^= tail[ 2] << 16;
+  case  2: k1 ^= tail[ 1] << 8;
+  case  1: k1 ^= tail[ 0] << 0;
+           k1 *= c1; k1  = ROTL32(k1,15); k1 *= c2; h1 ^= k1;
+  };
+
+  //----------
+  // finalization
+
+  h1 ^= len; h2 ^= len; h3 ^= len; h4 ^= len;
+
+  h1 += h2; h1 += h3; h1 += h4;
+  h2 += h1; h3 += h1; h4 += h1;
+
+  h1 = fmix32(h1);
+  h2 = fmix32(h2);
+  h3 = fmix32(h3);
+  h4 = fmix32(h4);
+
+  h1 += h2; h1 += h3; h1 += h4;
+  h2 += h1; h3 += h1; h4 += h1;
+
+  ((uint32_t*)out)[0] = h1;
+  ((uint32_t*)out)[1] = h2;
+  ((uint32_t*)out)[2] = h3;
+  ((uint32_t*)out)[3] = h4;
+}
+
+//-----------------------------------------------------------------------------
+
+void MurmurHash3_x64_128 ( const void * key, const int len,
+                           const uint32_t seed, void * out )
+{
+  const uint8_t * data = (const uint8_t*)key;
+  const int nblocks = len / 16;
+  int i;
+
+  uint64_t h1 = seed;
+  uint64_t h2 = seed;
+
+  uint64_t c1 = BIG_CONSTANT(0x87c37b91114253d5);
+  uint64_t c2 = BIG_CONSTANT(0x4cf5ad432745937f);
+
+  //----------
+  // body
+
+  const uint64_t * blocks = (const uint64_t *)(data);
+
+  for(i = 0; i < nblocks; i++)
+  {
+    uint64_t k1 = getblock(blocks,i*2+0);
+    uint64_t k2 = getblock(blocks,i*2+1);
+
+    k1 *= c1; k1  = ROTL64(k1,31); k1 *= c2; h1 ^= k1;
+
+    h1 = ROTL64(h1,27); h1 += h2; h1 = h1*5+0x52dce729;
+
+    k2 *= c2; k2  = ROTL64(k2,33); k2 *= c1; h2 ^= k2;
+
+    h2 = ROTL64(h2,31); h2 += h1; h2 = h2*5+0x38495ab5;
+  }
+
+  //----------
+  // tail
+
+  const uint8_t * tail = (const uint8_t*)(data + nblocks*16);
+
+  uint64_t k1 = 0;
+  uint64_t k2 = 0;
+
+  switch(len & 15)
+  {
+  case 15: k2 ^= (uint64_t)(tail[14]) << 48;
+  case 14: k2 ^= (uint64_t)(tail[13]) << 40;
+  case 13: k2 ^= (uint64_t)(tail[12]) << 32;
+  case 12: k2 ^= (uint64_t)(tail[11]) << 24;
+  case 11: k2 ^= (uint64_t)(tail[10]) << 16;
+  case 10: k2 ^= (uint64_t)(tail[ 9]) << 8;
+  case  9: k2 ^= (uint64_t)(tail[ 8]) << 0;
+           k2 *= c2; k2  = ROTL64(k2,33); k2 *= c1; h2 ^= k2;
+
+  case  8: k1 ^= (uint64_t)(tail[ 7]) << 56;
+  case  7: k1 ^= (uint64_t)(tail[ 6]) << 48;
+  case  6: k1 ^= (uint64_t)(tail[ 5]) << 40;
+  case  5: k1 ^= (uint64_t)(tail[ 4]) << 32;
+  case  4: k1 ^= (uint64_t)(tail[ 3]) << 24;
+  case  3: k1 ^= (uint64_t)(tail[ 2]) << 16;
+  case  2: k1 ^= (uint64_t)(tail[ 1]) << 8;
+  case  1: k1 ^= (uint64_t)(tail[ 0]) << 0;
+           k1 *= c1; k1  = ROTL64(k1,31); k1 *= c2; h1 ^= k1;
+  };
+
+  //----------
+  // finalization
+
+  h1 ^= len; h2 ^= len;
+
+  h1 += h2;
+  h2 += h1;
+
+  h1 = fmix64(h1);
+  h2 = fmix64(h2);
+
+  h1 += h2;
+  h2 += h1;
+
+  ((uint64_t*)out)[0] = h1;
+  ((uint64_t*)out)[1] = h2;
+}
+
+//-----------------------------------------------------------------------------
+
diff --git a/murmur3.h b/murmur3.h
new file mode 100644
index 000000000..90878b00d
--- /dev/null
+++ b/murmur3.h
@@ -0,0 +1,24 @@
+#ifndef _MURMURHASH3_H_
+#define _MURMURHASH3_H_
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//-----------------------------------------------------------------------------
+
+void MurmurHash3_x86_32 (const void *key, int len, uint32_t seed, void *out);
+
+void MurmurHash3_x86_128(const void *key, int len, uint32_t seed, void *out);
+
+void MurmurHash3_x64_128(const void *key, int len, uint32_t seed, void *out);
+
+//-----------------------------------------------------------------------------
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _MURMURHASH3_H_
diff --git a/runme.sh b/runme.sh
new file mode 100755
index 000000000..4243ea5d7
--- /dev/null
+++ b/runme.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+gcc example1.c bitmap.c murmur3.c -Wall -I /usr/local/include/freetype2/ -lfreetype -o example1 
+gcc example2.c bitmap.c murmur3.c -Wall -I /usr/local/include/freetype2/ -lfreetype -o example2
+