tests/web_interface/main.c - third_party/freetype2 - Git at Google

 #include "bitmap.h"

 struct entry
 {
   int code;
   char base_img[256];
   char test_img[256];
   char base_hash[33];
   char test_hash[33];
   double base_value;
   double test_value;
   double difference;
 };

 void render(const char*, const char*, FT_UInt32, int, struct entry (*entries)[], int*, int*);

 int compare(const void* e1, const void* e2);

 void make_html(struct entry (*entries)[], int* num, const char*);

 int main(int argc, char const *argv[])
 {
   const char* base_ft;
   const char* test_ft;
   FT_UInt32 size;
   const char* font;
   int num = 0;
   int max = 0;
   int mode;
   struct entry entries[2000];
   for (int i = 0; i < 2000; ++i)
   {
     entries[i].difference = 0.0;
   }

   if(argc != 5)
   {
     printf("Usage: %s <base ft.so> <test ft.so> <char size> <font>\n", argv[0]);
     return 0;
   }

   base_ft = argv[1];
   test_ft = argv[2];
   size = atoi(argv[3]);
   font = argv[4];

   mode = 0; // base hashes
   render(base_ft, font, size, mode, &entries, &num, &max);

   mode = 1; // test hashes
   render(test_ft, font, size, mode, &entries, &num, &max);

   mode = 2; // base images for differing glyphs
   render(test_ft, font, size, mode, &entries, &num, &max);

   mode = 3; // test images for differing glyphs
   render(test_ft, font, size, mode, &entries, &num, &max);

   qsort(entries, 2000, sizeof(struct entry), compare);
   make_html(&entries, &num, font);
 }

 void make_html(struct entry (*entries)[], int* num, const char* font)
 {
   FILE *fp = fopen("index.html", "w");
   if (fp == NULL)
   {
     printf("Error opening file.\n");
     exit(1);
   }
   fprintf(fp, "<!DOCTYPE html>\n<html>\n<head>\n<style>\nimg{image-rendering: optimizeSpeed;image-rendering: -moz-crisp-edges;image-rendering: -o-crisp-edges;image-rendering: -webkit-optimize-contrast;image-rendering: pixelated;image-rendering: optimize-contrast;-ms-interpolation-mode: nearest-neighbor;min-width:10%%}\ntable, th, td{\nborder: 1px solid black;\n}\n</style>\n</head>\n\n<body>\n");
   fprintf(fp, "<p>%s</p>\n<table style=\"width:100%%\">", font);
   fprintf(fp, "<tr><th>ID</th><th>Difference</th><th>Base glyph | Test glyph</th></tr>\n");
   for (int i = 0; i < *num; ++i)
   {
     fprintf(fp, "<tr><td>%d</td><td>%.2f</td><td><img src=\"%s\"</img> <img src=\"%s\"</img></td></tr>\n", (*entries)[i].code, (*entries)[i].difference, (*entries)[i].base_img, (*entries)[i].test_img);
   }
   fprintf(fp, "</table>\n</body>\n</html>");
   fclose(fp);

 }

 int compare (const void* e1, const void* e2)
 {
   struct entry *s1 = (struct entry *)e1;
   struct entry *s2 = (struct entry *)e2;
   int comp = (int)(s1->difference) - (int)(s2->difference);
   return -comp;
 }

 // mode 0: hash base
 // mode 1: hash test
 // mode 2: image base
 // mode 3: image test
 void render(const char* ft_dir, const char* font, FT_UInt32 size, int mode, struct entry (*entries)[], int* num, int* max)
 {
   FT_Library library;
   FT_Face face;
   FT_GlyphSlot slot;
   FT_Bitmap *bitmap;
   FT_Error error;
   int i;

   FT_Error (*ft_init_fun)(FT_Library*);
   FT_Error (*ft_newface_fun)(FT_Library, const char*, FT_Long, FT_Face*);
   FT_Error (*ft_setcharsize_fun)(FT_Face, FT_F26Dot6, FT_F26Dot6, FT_UInt,
     FT_UInt);
   FT_Error (*ft_loadglyph_fun)(FT_Face, FT_UInt, FT_Int32);
   FT_Error (*ft_renderglyph_fun)(FT_GlyphSlot, FT_Render_Mode);
   FT_Error (*ft_doneface_fun)(FT_Face);
   FT_Error (*ft_donefreetype_fun)(FT_Library);
   void (*ft_bitmapinit_fun)(FT_Bitmap*);
   FT_Error (*ft_bitmapconvert_fun)(FT_Library, const FT_Bitmap*, FT_Bitmap,
     FT_Int);

   void* handle = dlopen(ft_dir, RTLD_LAZY | RTLD_LOCAL | RTLD_DEEPBIND);
   if (!handle) {
     fputs(dlerror(), stderr);
     exit(1);
   }

   dlerror();

   *(void**)(&ft_init_fun) = dlsym(handle,"FT_Init_FreeType");
   *(void**)(&ft_newface_fun) = dlsym(handle,"FT_New_Face");
   *(void**)(&ft_setcharsize_fun) = dlsym(handle,"FT_Set_Char_Size");
   *(void**)(&ft_loadglyph_fun) = dlsym(handle,"FT_Load_Glyph");
   *(void**)(&ft_renderglyph_fun) = dlsym(handle,"FT_Render_Glyph");
   *(void**)(&ft_doneface_fun) = dlsym(handle,"FT_Done_Face");
   *(void**)(&ft_donefreetype_fun) = dlsym(handle,"FT_Done_FreeType");
   *(void**)(&ft_bitmapinit_fun) = dlsym(handle,"FT_Bitmap_Init");
   *(void**)(&ft_bitmapconvert_fun) = dlsym(handle,"FT_Bitmap_Convert");

   dlerror();

   error = ft_init_fun(&library);
   if (error)
   {
     printf("Error: library init");
   }

   error = ft_newface_fun(library, font, 0, &face);
   if (error)
   {
     printf("Error: loading face");
   }

   error = ft_setcharsize_fun(face, size * 64, 0, 96, 0);
   if (error)
   {
     printf("Error: setting char size");
   }

   slot = face->glyph;

   for (i = 0; i < face->num_glyphs; ++i)
   {
     (*entries)[i].code = i;
     if (((mode == 2) || (mode == 3)) &&
       (strcmp((*entries)[i].base_hash, (*entries)[i].test_hash) == 0))
     {
       continue;
     }

     error = ft_loadglyph_fun(face, i, FT_LOAD_DEFAULT);
     if (error)
     {
       printf("Error: loading glyph");
     }

     error = ft_renderglyph_fun(slot, FT_RENDER_MODE_NORMAL);
     if (error)
     {
       printf("Error: rendering glyph");
     }

     bitmap = &slot->bitmap;

     if ((mode == 0) || (mode == 1))
     {
       HASH_128 * murmur = (HASH_128 *)malloc(sizeof(HASH_128));
       murmur = Generate_Hash_x64_128(bitmap, murmur);
       if (mode == 0)
       {
         sprintf((*entries)[i].base_hash, "%08x%08x%08x%08x", murmur->hash[0], murmur->hash[1],
           murmur->hash[2], murmur->hash[3]);
       }
       else
       {
         sprintf((*entries)[i].test_hash, "%08x%08x%08x%08x", murmur->hash[0], murmur->hash[1],
           murmur->hash[2], murmur->hash[3]);

       }

     } else {
       *max = i;
       if (bitmap->width == 0 || bitmap->rows == 0)
       {
         continue;
       }
       if (mode == 2)
       {
         *num = *num + 1;
         Make_PNG(bitmap, "base", i, 1);
         sprintf((*entries)[i].base_img, "base_%d.png", i);
         (*entries)[i].base_value = (double)(rand() % 1000);
       } else if (mode == 3){
         Make_PNG(bitmap, "test", i, 1);
         sprintf((*entries)[i].test_img, "test_%d.png", i);
         (*entries)[i].test_value = (double)(rand() % 1000);
         (*entries)[i].difference = fabs((*entries)[i].base_value- (*entries)[i].test_value);
       }
     }
   }

   error = ft_doneface_fun(face);
   if (error)
   {
     printf("Error: freeing face");
   }

   error = ft_donefreetype_fun(library);
   if (error)
   {
     printf("Error: freeing library");
   }
   dlclose(handle);
 }
	#include "bitmap.h"

	struct entry
	{
	int code;
	char base_img[256];
	char test_img[256];
	char base_hash[33];
	char test_hash[33];
	double base_value;
	double test_value;
	double difference;
	};

	void render(const char, const char, FT_UInt32, int, struct entry (entries)[], int, int*);

	int compare(const void* e1, const void* e2);

	void make_html(struct entry (entries)[], int num, const char*);

	int main(int argc, char const *argv[])
	{
	const char* base_ft;
	const char* test_ft;
	FT_UInt32 size;
	const char* font;
	int num = 0;
	int max = 0;
	int mode;
	struct entry entries[2000];
	for (int i = 0; i < 2000; ++i)
	{
	entries[i].difference = 0.0;
	}

	if(argc != 5)
	{
	printf("Usage: %s <base ft.so> <test ft.so> <char size> <font>\n", argv[0]);
	return 0;
	}

	base_ft = argv[1];
	test_ft = argv[2];
	size = atoi(argv[3]);
	font = argv[4];

	mode = 0; // base hashes
	render(base_ft, font, size, mode, &entries, &num, &max);

	mode = 1; // test hashes
	render(test_ft, font, size, mode, &entries, &num, &max);

	mode = 2; // base images for differing glyphs
	render(test_ft, font, size, mode, &entries, &num, &max);

	mode = 3; // test images for differing glyphs
	render(test_ft, font, size, mode, &entries, &num, &max);

	qsort(entries, 2000, sizeof(struct entry), compare);
	make_html(&entries, &num, font);
	}

	void make_html(struct entry (entries)[], int num, const char* font)
	{
	FILE *fp = fopen("index.html", "w");
	if (fp == NULL)
	{
	printf("Error opening file.\n");
	exit(1);
	}
	fprintf(fp, "<!DOCTYPE html>\n<html>\n<head>\n<style>\nimg{image-rendering: optimizeSpeed;image-rendering: -moz-crisp-edges;image-rendering: -o-crisp-edges;image-rendering: -webkit-optimize-contrast;image-rendering: pixelated;image-rendering: optimize-contrast;-ms-interpolation-mode: nearest-neighbor;min-width:10%%}\ntable, th, td{\nborder: 1px solid black;\n}\n</style>\n</head>\n\n<body>\n");
	fprintf(fp, "<p>%s</p>\n<table style=\"width:100%%\">", font);
	fprintf(fp, "<tr><th>ID</th><th>Difference</th><th>Base glyph \| Test glyph</th></tr>\n");
	for (int i = 0; i < *num; ++i)
	{
	fprintf(fp, "<tr><td>%d</td><td>%.2f</td><td><img src=\"%s\"</img> <img src=\"%s\"</img></td></tr>\n", (entries)[i].code, (entries)[i].difference, (entries)[i].base_img, (entries)[i].test_img);
	}
	fprintf(fp, "</table>\n</body>\n</html>");
	fclose(fp);

	}

	int compare (const void* e1, const void* e2)
	{
	struct entry s1 = (struct entry )e1;
	struct entry s2 = (struct entry )e2;
	int comp = (int)(s1->difference) - (int)(s2->difference);
	return -comp;
	}

	// mode 0: hash base
	// mode 1: hash test
	// mode 2: image base
	// mode 3: image test
	void render(const char* ft_dir, const char* font, FT_UInt32 size, int mode, struct entry (entries)[], int num, int* max)
	{
	FT_Library library;
	FT_Face face;
	FT_GlyphSlot slot;
	FT_Bitmap *bitmap;
	FT_Error error;
	int i;

	FT_Error (ft_init_fun)(FT_Library);
	FT_Error (ft_newface_fun)(FT_Library, const char, FT_Long, FT_Face*);
	FT_Error (*ft_setcharsize_fun)(FT_Face, FT_F26Dot6, FT_F26Dot6, FT_UInt,
	FT_UInt);
	FT_Error (*ft_loadglyph_fun)(FT_Face, FT_UInt, FT_Int32);
	FT_Error (*ft_renderglyph_fun)(FT_GlyphSlot, FT_Render_Mode);
	FT_Error (*ft_doneface_fun)(FT_Face);
	FT_Error (*ft_donefreetype_fun)(FT_Library);
	void (ft_bitmapinit_fun)(FT_Bitmap);
	FT_Error (ft_bitmapconvert_fun)(FT_Library, const FT_Bitmap, FT_Bitmap,
	FT_Int);

	void* handle = dlopen(ft_dir, RTLD_LAZY \| RTLD_LOCAL \| RTLD_DEEPBIND);
	if (!handle) {
	fputs(dlerror(), stderr);
	exit(1);
	}

	dlerror();

	(void*)(&ft_init_fun) = dlsym(handle,"FT_Init_FreeType");
	(void*)(&ft_newface_fun) = dlsym(handle,"FT_New_Face");
	(void*)(&ft_setcharsize_fun) = dlsym(handle,"FT_Set_Char_Size");
	(void*)(&ft_loadglyph_fun) = dlsym(handle,"FT_Load_Glyph");
	(void*)(&ft_renderglyph_fun) = dlsym(handle,"FT_Render_Glyph");
	(void*)(&ft_doneface_fun) = dlsym(handle,"FT_Done_Face");
	(void*)(&ft_donefreetype_fun) = dlsym(handle,"FT_Done_FreeType");
	(void*)(&ft_bitmapinit_fun) = dlsym(handle,"FT_Bitmap_Init");
	(void*)(&ft_bitmapconvert_fun) = dlsym(handle,"FT_Bitmap_Convert");

	dlerror();

	error = ft_init_fun(&library);
	if (error)
	{
	printf("Error: library init");
	}

	error = ft_newface_fun(library, font, 0, &face);
	if (error)
	{
	printf("Error: loading face");
	}

	error = ft_setcharsize_fun(face, size * 64, 0, 96, 0);
	if (error)
	{
	printf("Error: setting char size");
	}

	slot = face->glyph;

	for (i = 0; i < face->num_glyphs; ++i)
	{
	(*entries)[i].code = i;
	if (((mode == 2) \|\| (mode == 3)) &&
	(strcmp((entries)[i].base_hash, (entries)[i].test_hash) == 0))
	{
	continue;
	}

	error = ft_loadglyph_fun(face, i, FT_LOAD_DEFAULT);
	if (error)
	{
	printf("Error: loading glyph");
	}

	error = ft_renderglyph_fun(slot, FT_RENDER_MODE_NORMAL);
	if (error)
	{
	printf("Error: rendering glyph");
	}

	bitmap = &slot->bitmap;

	if ((mode == 0) \|\| (mode == 1))
	{
	HASH_128 * murmur = (HASH_128 *)malloc(sizeof(HASH_128));
	murmur = Generate_Hash_x64_128(bitmap, murmur);
	if (mode == 0)
	{
	sprintf((*entries)[i].base_hash, "%08x%08x%08x%08x", murmur->hash[0], murmur->hash[1],
	murmur->hash[2], murmur->hash[3]);
	}
	else
	{
	sprintf((*entries)[i].test_hash, "%08x%08x%08x%08x", murmur->hash[0], murmur->hash[1],
	murmur->hash[2], murmur->hash[3]);

	}

	} else {
	*max = i;
	if (bitmap->width == 0 \|\| bitmap->rows == 0)
	{
	continue;
	}
	if (mode == 2)
	{
	num = num + 1;
	Make_PNG(bitmap, "base", i, 1);
	sprintf((*entries)[i].base_img, "base_%d.png", i);
	(*entries)[i].base_value = (double)(rand() % 1000);
	} else if (mode == 3){
	Make_PNG(bitmap, "test", i, 1);
	sprintf((*entries)[i].test_img, "test_%d.png", i);
	(*entries)[i].test_value = (double)(rand() % 1000);
	(entries)[i].difference = fabs((entries)[i].base_value- (*entries)[i].test_value);
	}
	}
	}

	error = ft_doneface_fun(face);
	if (error)
	{
	printf("Error: freeing face");
	}

	error = ft_donefreetype_fun(library);
	if (error)
	{
	printf("Error: freeing library");
	}
	dlclose(handle);
	}