[Git][freetype/freetype-demos][master] [ftlint] Render and calculate MD5

Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType Demo Programs

Commits:

d8db386c

by Sarthak Bhardwaj at 2021-06-12T23:56:39-04:00

[ftlint] Render and calculate MD5 checksum.

* src/ftlint.c (main): Handle the load flags and the render mode from
the command line.
(Checksum): Calculate MD5 sum.
* src/md5.c, src/md5.h: MD5 source code.
* Makefile, messon.build: Update the build systems.

Co-authored-by: Sarthak Bhardwaj  <1sarthakbhardwaj@gmail.com>
Co-authored-by: Anurag Thakur  <devanuragthakur@gmail.com>

6 changed files:

ChangeLog
Makefile
meson.build
src/ftlint.c
+ src/md5.c
+ src/md5.h

Changes:

ChangeLog

 +2021-06-13  Sarthak Bhardwaj  <1sarthakbhardwaj@gmail.com>
 +            Anurag Thakur  <devanuragthakur@gmail.com>
++
 +	[ftlint] Render and calculate MD5 checksum.
++
 +	* src/ftlint.c (main): Handle the load flags and the render mode from
 +	the command line.
 +	(Checksum): Calculate MD5 sum.
 +	* src/md5.c, src/md5.h: MD5 source code.
 +	* Makefile, messon.build: Update the build systems.
++
 -06-06  Anuj Verma  <anujv@iitbhilai.ac.in>
  	[ftsdf] Synchronize with the change made in the `sdf` renderer.

Makefile

@@ -345,10 +345,12 @@ else
    $(OBJ_DIR_2)/common.$(SO): $(SRC_DIR)/common.c
    $(OBJ_DIR_2)/strbuf.$(SO): $(SRC_DIR)/strbuf.c
    $(OBJ_DIR_2)/output.$(SO): $(SRC_DIR)/output.c
 +  $(OBJ_DIR_2)/md5.$(SO): $(SRC_DIR)/md5.c
    $(OBJ_DIR_2)/mlgetopt.$(SO): $(SRC_DIR)/mlgetopt.c
    COMMON_OBJ := $(OBJ_DIR_2)/common.$(SO) \
                  $(OBJ_DIR_2)/strbuf.$(SO) \
                  $(OBJ_DIR_2)/output.$(SO) \
 +                $(OBJ_DIR_2)/md5.$(SO) \
                  $(OBJ_DIR_2)/mlgetopt.$(SO)
    $(OBJ_DIR_2)/ftcommon.$(SO): $(SRC_DIR)/ftcommon.c $(SRC_DIR)/ftcommon.h

meson.build

@@ -41,6 +41,8 @@ common_files = files([
    'src/common.h',
    'src/strbuf.c',
    'src/strbuf.h',
 +  'src/md5.c',
 +  'src/md5.h',
  ])
  # Use `mlgetopt.h` on non-Unix platforms.

src/ftlint.c

@@ -6,7 +6,7 @@
  /*  D. Turner, R.Wilhelm, and W. Lemberg                                    */
  /*                                                                          */
  /*  ftlint: a simple font tester. This program tries to load all the        */
 -/*          glyphs of a given font.                                         */
 +/*          glyphs of a given font, render them, and calculate MD5.         */
  /*                                                                          */
  /*  NOTE:  This is just a test program that is used to show off and         */
  /*         debug the current engine.                                        */
@@ -14,20 +14,30 @@
  /****************************************************************************/
  #include <ft2build.h>
 -#include FT_FREETYPE_H
 +#include <freetype/freetype.h>
 +#include <freetype/ftbitmap.h>
++
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
 +#include "md5.h"
 -#define  xxTEST_PSNAMES
 +#ifdef UNIX
 +#include <unistd.h>
 +#else
 +#include "mlgetopt.h"
 +#endif
 -  static FT_Error  error;
 +#define  xxTEST_PSNAMES
 -  static FT_Library    library;
 -  static FT_Face       face;
 +  static FT_Error        error;
 +  static FT_Library      library;
 +  static FT_Face         face;
 +  static FT_Render_Mode  render_mode = FT_RENDER_MODE_NORMAL;
 +  static FT_Int32        load_flags  = FT_LOAD_DEFAULT;
    static unsigned int  num_glyphs;
    static int           ptsize;
@@ -41,8 +51,11 @@
      printf( "ftlint: simple font tester -- part of the FreeType project\n" );
      printf( "----------------------------------------------------------\n" );
      printf( "\n" );
 -    printf( "Usage: %s ppem fontname[.ttf|.ttc] [fontname2..]\n", name );
 +    printf( "Usage: %s [options] ppem fontname[.ttf|.ttc] [fontname2..]\n",
 +            name );
      printf( "\n" );
 +    printf( "  -f L   Use hex number L as load flags (see `FT_LOAD_XXX').\n" );
 +    printf( "  -r N   Set render mode to N\n" );
      exit( 1 );
+   }
@@ -55,6 +68,43 @@
      exit(1);
+   }
 +  static void
 +  Checksum( FT_GlyphSlot glyph )
 +  {
 +      FT_Bitmap  bitmap;
 +      FT_Error err;
 +      FT_Bitmap_Init( &bitmap );
++
++
 +      printf( "#%u ", glyph->glyph_index );
++
 +      err = FT_Bitmap_Convert( library, &glyph->bitmap, &bitmap, 1 );
 +      if ( !err )
 +      {
 +        MD5_CTX        ctx;
 +        unsigned char  md5[16];
 +        int            i;
 +        int            rows  = (int)bitmap.rows;
 +        int            pitch = bitmap.pitch;
++
 +        MD5_Init( &ctx );
 +        if ( bitmap.buffer )
 +          MD5_Update( &ctx, bitmap.buffer,
 +                      (unsigned long)rows * (unsigned long)pitch );
 +        MD5_Final( md5, &ctx );
++
 +        for ( i = 0; i < 16; i++ )
 +        {
 +          printf( "%02X", md5[i] );
 +        }
 +        printf( "\n" );
 +      }
 +      else
 +        printf("Error generating checksums\n");
++
 +      FT_Bitmap_Done( library, &bitmap );
 +  }
++
    int
    main( int     argc,
@@ -65,6 +115,7 @@
      char          filename[1024];
      char*         execname;
      char*         fname;
 +    int           opt;
      execname = argv[0];
@@ -72,22 +123,56 @@
      if ( argc < 3 )
        Usage( execname );
 -    if ( sscanf( argv[1], "%d", &ptsize ) != 1 )
 +    while ( ( opt =  getopt( argc, argv, "f:r:") ) != -1)
 +    {
++
 +      switch ( opt )
 +      {
++
 +      case 'f':
 +        load_flags = strtol( optarg, NULL, 16 );
 +        break;
++
 +      case 'r':
 +        {
 +         int  rm = atoi( optarg );
++
++
 +         if ( rm < 0 || rm >= FT_RENDER_MODE_MAX )
 +            render_mode = FT_RENDER_MODE_NORMAL;
 +          else
 +            render_mode = (FT_Render_Mode)rm;
 +        }
 +        break;
++
 +      default:
 +        Usage( execname );
 +        break;
 +      }
 +    }
++
 +    argc -= optind;
 +    argv += optind;
++
++
 +    if( sscanf( argv[0], "%d", &ptsize) != 1)
        Usage( execname );
      error = FT_Init_FreeType( &library );
 -    if (error) Panic( "Could not create library object" );
 +    if ( error )
 +      Panic( "Could not create library object" );
++
      /* Now check all files */
 -    for ( file_index = 2; file_index < argc; file_index++ )
 +    for ( file_index = 1; file_index < argc; file_index++ )
+     {
        fname = argv[file_index];
        /* try to open the file with no extra extension first */
        error = FT_New_Face( library, fname, 0, &face );
 -      if (!error)
 +      if ( !error )
+       {
 -        printf( "%s: ", fname );
 +        printf( "%s: \n", fname );
          goto Success;
+       }
@@ -132,7 +217,7 @@
          else
            i--;
 -      printf( "%s: ", fname );
 +      printf( "%s: \n", fname );
        /* Load face */
        error = FT_New_Face( library, filename, 0, &face );
@@ -158,29 +243,33 @@
  #endif
        error = FT_Set_Char_Size( face, ptsize << 6, ptsize << 6, 72, 72 );
 -      if (error) Panic( "Could not set character size" );
 +      if ( error )
 +        Panic( "Could not set character size" );
        Fail = 0;
+       {
          for ( id = 0; id < num_glyphs; id++ )
+         {
 -          error = FT_Load_Glyph( face, id, FT_LOAD_DEFAULT );
 -          if (error)
 +          error = FT_Load_Glyph( face, id, load_flags );
 +          if ( error )
+           {
              if ( Fail < 10 )
                printf( "glyph %4u: 0x%04x\n" , id, error );
              Fail++;
 +            continue;
+           }
++
 +          FT_Render_Glyph( face->glyph, render_mode );
 +          Checksum( face->glyph );
+         }
+       }
        if ( Fail == 0 )
          printf( "OK.\n" );
 +      else if ( Fail == 1 )
 +        printf( "1 fail.\n" );
        else
 -        if ( Fail == 1 )
 -          printf( "1 fail.\n" );
 -        else
 -          printf( "%d fails.\n", Fail );
 +        printf( "%d fails.\n", Fail );
        FT_Done_Face( face );
+     }

src/md5.c

 +/*
 + * This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
 + * MD5 Message-Digest Algorithm (RFC 1321).
 + *
 + * Homepage:
 + * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
 + *
 + * Author:
 + * Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
 + *
 + * This software was written by Alexander Peslyak in 2001.  No copyright is
 + * claimed, and the software is hereby placed in the public domain.
 + * In case this attempt to disclaim copyright and place the software in the
 + * public domain is deemed null and void, then the software is
 + * Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
 + * general public under the following terms:
 + *
 + * Redistribution and use in source and binary forms, with or without
 + * modification, are permitted.
 + *
 + * There's ABSOLUTELY NO WARRANTY, express or implied.
 + *
 + * (This is a heavily cut-down "BSD license".)
 + *
 + * This differs from Colin Plumb's older public domain implementation in that
 + * no exactly 32-bit integer data type is required (any 32-bit or wider
 + * unsigned integer data type will do), there's no compile-time endianness
 + * configuration, and the function prototypes match OpenSSL's.  No code from
 + * Colin Plumb's implementation has been reused; this comment merely compares
 + * the properties of the two independent implementations.
 + *
 + * The primary goals of this implementation are portability and ease of use.
 + * It is meant to be fast, but not as fast as possible.  Some known
 + * optimizations are not included to reduce source code size and avoid
 + * compile-time configuration.
 + */
++
 +#ifndef HAVE_OPENSSL
++
 +#include <string.h>
++
 +#include "md5.h"
++
 +/*
 + * The basic MD5 functions.
 + *
 + * F and G are optimized compared to their RFC 1321 definitions for
 + * architectures that lack an AND-NOT instruction, just like in Colin Plumb's
 + * implementation.
 + */
 +#define F(x, y, z)			((z) ^ ((x) & ((y) ^ (z))))
 +#define G(x, y, z)			((y) ^ ((z) & ((x) ^ (y))))
 +#define H(x, y, z)			(((x) ^ (y)) ^ (z))
 +#define H2(x, y, z)			((x) ^ ((y) ^ (z)))
 +#define I(x, y, z)			((y) ^ ((x) | ~(z)))
++
 +/*
 + * The MD5 transformation for all four rounds.
 + */
 +#define STEP(f, a, b, c, d, x, t, s) \
 +	(a) += f((b), (c), (d)) + (x) + (t); \
 +	(a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s)))); \
 +	(a) += (b);
++
 +/*
 + * SET reads 4 input bytes in little-endian byte order and stores them in a
 + * properly aligned word in host byte order.
 + *
 + * The check for little-endian architectures that tolerate unaligned memory
 + * accesses is just an optimization.  Nothing will break if it fails to detect
 + * a suitable architecture.
 + *
 + * Unfortunately, this optimization may be a C strict aliasing rules violation
 + * if the caller's data buffer has effective type that cannot be aliased by
 + * MD5_u32plus.  In practice, this problem may occur if these MD5 routines are
 + * inlined into a calling function, or with future and dangerously advanced
 + * link-time optimizations.  For the time being, keeping these MD5 routines in
 + * their own translation unit avoids the problem.
 + */
 +#if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
 +#define SET(n) \
 +	(*(MD5_u32plus *)&ptr[(n) * 4])
 +#define GET(n) \
 +	SET(n)
 +#else
 +#define SET(n) \
 +	(ctx->block[(n)] = \
 +	(MD5_u32plus)ptr[(n) * 4] | \
 +	((MD5_u32plus)ptr[(n) * 4 + 1] << 8) | \
 +	((MD5_u32plus)ptr[(n) * 4 + 2] << 16) | \
 +	((MD5_u32plus)ptr[(n) * 4 + 3] << 24))
 +#define GET(n) \
 +	(ctx->block[(n)])
 +#endif
++
 +/*
 + * This processes one or more 64-byte data blocks, but does NOT update the bit
 + * counters.  There are no alignment requirements.
 + */
 +static const void *body(MD5_CTX *ctx, const void *data, unsigned long size)
 +{
 +	const unsigned char *ptr;
 +	MD5_u32plus a, b, c, d;
 +	MD5_u32plus saved_a, saved_b, saved_c, saved_d;
++
 +	ptr = (const unsigned char *)data;
++
 +	a = ctx->a;
 +	b = ctx->b;
 +	c = ctx->c;
 +	d = ctx->d;
++
 +	do {
 +		saved_a = a;
 +		saved_b = b;
 +		saved_c = c;
 +		saved_d = d;
++
 +/* Round 1 */
 +		STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
 +		STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
 +		STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
 +		STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
 +		STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
 +		STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
 +		STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
 +		STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
 +		STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
 +		STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
 +		STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
 +		STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
 +		STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
 +		STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
 +		STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
 +		STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
++
 +/* Round 2 */
 +		STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
 +		STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
 +		STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
 +		STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
 +		STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
 +		STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
 +		STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
 +		STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
 +		STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
 +		STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
 +		STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
 +		STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
 +		STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
 +		STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
 +		STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
 +		STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
++
 +/* Round 3 */
 +		STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
 +		STEP(H2, d, a, b, c, GET(8), 0x8771f681, 11)
 +		STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
 +		STEP(H2, b, c, d, a, GET(14), 0xfde5380c, 23)
 +		STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
 +		STEP(H2, d, a, b, c, GET(4), 0x4bdecfa9, 11)
 +		STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
 +		STEP(H2, b, c, d, a, GET(10), 0xbebfbc70, 23)
 +		STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
 +		STEP(H2, d, a, b, c, GET(0), 0xeaa127fa, 11)
 +		STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
 +		STEP(H2, b, c, d, a, GET(6), 0x04881d05, 23)
 +		STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
 +		STEP(H2, d, a, b, c, GET(12), 0xe6db99e5, 11)
 +		STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
 +		STEP(H2, b, c, d, a, GET(2), 0xc4ac5665, 23)
++
 +/* Round 4 */
 +		STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
 +		STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
 +		STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
 +		STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
 +		STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
 +		STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
 +		STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
 +		STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
 +		STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
 +		STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
 +		STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
 +		STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
 +		STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
 +		STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
 +		STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
 +		STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
++
 +		a += saved_a;
 +		b += saved_b;
 +		c += saved_c;
 +		d += saved_d;
++
 +		ptr += 64;
 +	} while (size -= 64);
++
 +	ctx->a = a;
 +	ctx->b = b;
 +	ctx->c = c;
 +	ctx->d = d;
++
 +	return ptr;
 +}
++
 +void MD5_Init(MD5_CTX *ctx)
 +{
 +	ctx->a = 0x67452301;
 +	ctx->b = 0xefcdab89;
 +	ctx->c = 0x98badcfe;
 +	ctx->d = 0x10325476;
++
 +	ctx->lo = 0;
 +	ctx->hi = 0;
 +}
++
 +void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size)
 +{
 +	MD5_u32plus saved_lo;
 +	unsigned long used, available;
++
 +	saved_lo = ctx->lo;
 +	if ((ctx->lo = (saved_lo + size) & 0x1fffffff) < saved_lo)
 +		ctx->hi++;
 +	ctx->hi += size >> 29;
++
 +	used = saved_lo & 0x3f;
++
 +	if (used) {
 +		available = 64 - used;
++
 +		if (size < available) {
 +			memcpy(&ctx->buffer[used], data, size);
 +			return;
 +		}
++
 +		memcpy(&ctx->buffer[used], data, available);
 +		data = (const unsigned char *)data + available;
 +		size -= available;
 +		body(ctx, ctx->buffer, 64);
 +	}
++
 +	if (size >= 64) {
 +		data = body(ctx, data, size & ~(unsigned long)0x3f);
 +		size &= 0x3f;
 +	}
++
 +	memcpy(ctx->buffer, data, size);
 +}
++
 +#define OUT(dst, src) \
 +	(dst)[0] = (unsigned char)(src); \
 +	(dst)[1] = (unsigned char)((src) >> 8); \
 +	(dst)[2] = (unsigned char)((src) >> 16); \
 +	(dst)[3] = (unsigned char)((src) >> 24);
++
 +void MD5_Final(unsigned char *result, MD5_CTX *ctx)
 +{
 +	unsigned long used, available;
++
 +	used = ctx->lo & 0x3f;
++
 +	ctx->buffer[used++] = 0x80;
++
 +	available = 64 - used;
++
 +	if (available < 8) {
 +		memset(&ctx->buffer[used], 0, available);
 +		body(ctx, ctx->buffer, 64);
 +		used = 0;
 +		available = 64;
 +	}
++
 +	memset(&ctx->buffer[used], 0, available - 8);
++
 +	ctx->lo <<= 3;
 +	OUT(&ctx->buffer[56], ctx->lo)
 +	OUT(&ctx->buffer[60], ctx->hi)
++
 +	body(ctx, ctx->buffer, 64);
++
 +	OUT(&result[0], ctx->a)
 +	OUT(&result[4], ctx->b)
 +	OUT(&result[8], ctx->c)
 +	OUT(&result[12], ctx->d)
++
 +	memset(ctx, 0, sizeof(*ctx));
 +}
++
 +#endif

src/md5.h

 +/*
 + * This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
 + * MD5 Message-Digest Algorithm (RFC 1321).
 + *
 + * Homepage:
 + * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
 + *
 + * Author:
 + * Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
 + *
 + * This software was written by Alexander Peslyak in 2001.  No copyright is
 + * claimed, and the software is hereby placed in the public domain.
 + * In case this attempt to disclaim copyright and place the software in the
 + * public domain is deemed null and void, then the software is
 + * Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
 + * general public under the following terms:
 + *
 + * Redistribution and use in source and binary forms, with or without
 + * modification, are permitted.
 + *
 + * There's ABSOLUTELY NO WARRANTY, express or implied.
 + *
 + * See md5.c for more information.
 + */
++
 +#ifdef HAVE_OPENSSL
 +#include <openssl/md5.h>
 +#elif !defined(_MD5_H)
 +#define _MD5_H
++
 +/* Any 32-bit or wider unsigned integer data type will do */
 +typedef unsigned int MD5_u32plus;
++
 +typedef struct {
 +	MD5_u32plus lo, hi;
 +	MD5_u32plus a, b, c, d;
 +	unsigned char buffer[64];
 +	MD5_u32plus block[16];
 +} MD5_CTX;
++
 +extern void MD5_Init(MD5_CTX *ctx);
 +extern void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size);
 +extern void MD5_Final(unsigned char *result, MD5_CTX *ctx);
++
 +#endif

From:	Alexei Podtelezhnikov (@apodtele)
Subject:	[Git][freetype/freetype-demos][master] [ftlint] Render and calculate MD5 checksum.
Date:	Sun, 13 Jun 2021 04:01:29 +0000