[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[freetype2] GSoC-2017-kushal 6362455 01/52: First commit
|
From: |
Kushal K S V S |
|
Subject: |
[freetype2] GSoC-2017-kushal 6362455 01/52: First commit |
|
Date: |
Fri, 25 Aug 2017 15:09:33 -0400 (EDT) |
branch: GSoC-2017-kushal
commit 6362455c61ef9533c743672b26dd918b376108c6
Author: Kushal K S V S <address@hidden>
Commit: Kushal K S V S <address@hidden>
First commit
---
tests/make_bitmap/README | 7 +
tests/make_bitmap/bitmap.c | 281 ++++++++++++++++++++++++++++++++++++++
tests/make_bitmap/bitmap.h | 85 ++++++++++++
tests/make_bitmap/example1.c | 98 ++++++++++++++
tests/make_bitmap/example2.c | 93 +++++++++++++
tests/make_bitmap/murmur3.c | 312 +++++++++++++++++++++++++++++++++++++++++++
tests/make_bitmap/murmur3.h | 24 ++++
tests/make_bitmap/runme.sh | 4 +
8 files changed, 904 insertions(+)
diff --git a/tests/make_bitmap/README b/tests/make_bitmap/README
new file mode 100644
index 0000000..6a5430a
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/bitmap.c b/tests/make_bitmap/bitmap.c
new file mode 100644
index 0000000..ab15118
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/bitmap.h b/tests/make_bitmap/bitmap.h
new file mode 100644
index 0000000..43e7af1
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/example1.c b/tests/make_bitmap/example1.c
new file mode 100644
index 0000000..9bc6121
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/example2.c b/tests/make_bitmap/example2.c
new file mode 100644
index 0000000..4fa7910
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/murmur3.c b/tests/make_bitmap/murmur3.c
new file mode 100644
index 0000000..484ebfd
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/murmur3.h b/tests/make_bitmap/murmur3.h
new file mode 100644
index 0000000..90878b0
--- /dev/null
+++ b/tests/make_bitmap/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/tests/make_bitmap/runme.sh b/tests/make_bitmap/runme.sh
new file mode 100755
index 0000000..4243ea5
--- /dev/null
+++ b/tests/make_bitmap/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
+
| [Prev in Thread] |
Current Thread |
[Next in Thread] |
- [freetype2] GSoC-2017-kushal 6362455 01/52: First commit,
Kushal K S V S <=