gdtestft.c   [plain text]

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "gd.h"
#include <string.h>
#include <stdlib.h>

#define PI 3.141592
#define DEG2RAD(x) ((x)*PI/180.)

#define MAX(x,y) ((x) > (y) ? (x) : (y))
#define MIN(x,y) ((x) < (y) ? (x) : (y))

#define MAX4(x,y,z,w) \
	((MAX((x),(y))) > (MAX((z),(w))) ? (MAX((x),(y))) : (MAX((z),(w))))
#define MIN4(x,y,z,w) \
	((MIN((x),(y))) < (MIN((z),(w))) ? (MIN((x),(y))) : (MIN((z),(w))))

#define MAXX(x) MAX4(x[0],x[2],x[4],x[6])
#define MINX(x) MIN4(x[0],x[2],x[4],x[6])
#define MAXY(x) MAX4(x[1],x[3],x[5],x[7])
#define MINY(x) MIN4(x[1],x[3],x[5],x[7])

int
main (int argc, char *argv[])
{
#ifndef HAVE_LIBFREETYPE
  fprintf (stderr, "gd was not compiled with HAVE_LIBFREETYPE defined.\n");
  fprintf (stderr, "Install the FreeType library, including the\n");
  fprintf (stderr, "header files. Then edit the gd Makefile, type\n");
  fprintf (stderr, "make clean, and type make again.\n");
  return 1;
#else
  gdImagePtr im;
  int blue;
  int blueAlpha;
  int white;
  int brect[8];
  int x, y, sx, sy;
  char *err;
  FILE *out;
#ifdef JISX0208
  char *s = "Hello. こんにちは Qyjpqg,";	/* String to draw. */
#else
  char *s = "Hello. Qyjpqg,";	/* String to draw. */
#endif

  double sz = 40.;

#if 0
  double angle = 0.;
#else
  double angle = DEG2RAD (90);
#endif
  char *f;
  if (argc == 2)
    {
      f = argv[1];
    }
  else
    {
      /* 2.02: usage message. Defaulting to Times wasn't working well for the
         many people with no /usr/share/fonts/truetype. */
      fprintf (stderr, "Usage: gdtestft fontfilename\n");
      fprintf (stderr,
	       "If fontfilename is not a full or relative path, GDFONTPATH is searched for\n"
	       "it. If GDFONTPATH is not set, /usr/share/fonts/truetype is searched.\n");
      exit (1);
    }
  /* obtain brect so that we can size the image */
  err =
    gdImageStringFT ((gdImagePtr) NULL, &brect[0], 0, f, sz, angle, 0, 0, s);
  if (err)
    {
      fprintf (stderr, err);
      return 1;
    }

  /* create an image just big enough for the string (x3) */
  sx = MAXX (brect) - MINX (brect) + 6;
  sy = MAXY (brect) - MINY (brect) + 6;
#if 0
  /* Would be palette color 8-bit (which of course is still allowed,
     but not impressive when used with a JPEG background and antialiasing
     and alpha channel and so on!) */
  im = gdImageCreate (sx * 3, sy);
#else
  /* gd 2.0: true color images can use freetype too,
     and they can do antialiasing against arbitrary
     complex backgrounds. */
  im = gdImageCreateTrueColor (sx * 3, sy);
#endif
  /* Background color. gd 2.0: fill the image with it; truecolor
     images have a black background otherwise. */
  white = gdImageColorResolve (im, 255, 255, 255);
  /* Load a pretty background and resample it to cover the entire image */
  {
    FILE *in = fopen ("eleanor.jpg", "rb");
    gdImagePtr imb;
    if (in)
      {
#ifdef HAVE_LIBJPEG
	imb = gdImageCreateFromJpeg (in);
#else
	fprintf (stderr, "No JPEG library support.\n");
#endif
	if (!imb)
	  {
	    fprintf (stderr, "gdImageCreateFromJpeg failed\n");
	    exit (1);
	  }
	if (!im->trueColor)
	  {
	    /* If destination is not truecolor, convert the JPEG to a
	       reasonably high-quality palette version. This is not as good
	       as creating a truecolor output file, of course. Leave many
	       colors for text smoothing. */
#if 1
	    gdImageTrueColorToPalette (imb, 0, 128);
#endif
	  }
	/* Resample background image to cover new image exactly */
	gdImageCopyResampled (im, imb, 0, 0, 0, 0, sx * 3, sy,
			      gdImageSX (imb), gdImageSY (imb));
      }
    else
      {
	/* Can't get background, so paint a simple one */
	/* Truecolor images start out black, so paint it white */
	gdImageFilledRectangle (im, 0, 0, sx * 3, sy, white);
      }
  }
  /* TBB 2.0.2: only black was working, and I didn't know it because
     the test program used black. Funny, huh? Let's do a more interesting
     color this time.  */
  blue = gdImageColorResolve (im, 128, 192, 255);
  /* Almost-transparent blue (alpha blending), with antialiasing */
  blueAlpha = gdImageColorResolveAlpha (im, 128, 192, 255, gdAlphaMax / 2);
  /* render the string, offset origin to center string */
  x = 0 - MINX (brect) + 3;
  y = 0 - MINY (brect) + 3;

  /* With antialiasing (positive color value) */
  err = gdImageStringFT (im, NULL, blue, f, sz, angle, x, y, s);
  if (err)
    {
      fprintf (stderr, err);
      return 1;
    }
  /* Without antialiasing (negative color value) */
  err = gdImageStringFT (im, NULL, -blue, f, sz, angle, sx + x, y, s);
  if (err)
    {
      fprintf (stderr, err);
      return 1;
    }
  /* With antialiasing, and 50% alpha blending (truecolor only) */
  err = gdImageStringFT (im, NULL, blueAlpha, f, sz, angle, sx * 2 + x, y, s);
  if (err)
    {
      fprintf (stderr, err);
      return 1;
    }
  /* TBB: Write img to test/fttest.jpg or test/fttest.png */
  if (im->trueColor)
    {
      out = fopen ("test/fttest.jpg", "wb");
      if (!out)
	{
	  fprintf (stderr, "Can't create test/fttest.jpg\n");
	  exit (1);
	}
      /* Fairly high JPEG quality setting */
#ifdef HAVE_LIBJPEG
      gdImageJpeg (im, out, 90);
#else
      fprintf (stderr, "No JPEG library support.\n");
#endif
      fclose (out);
      fprintf (stderr, "Test image written to test/fttest.jpg\n");
    }
  else
    {
      out = fopen ("test/fttest.png", "wb");
      if (!out)
	{
	  fprintf (stderr, "Can't create test/fttest.png\n");
	  exit (1);
	}
      /* 2.0.10: correct ifdef, thanks to Gabriele Verzeletti */
#ifdef HAVE_LIBPNG
      gdImagePng (im, out);
#else
      fprintf (stderr, "No PNG library support.\n");
#endif
      fclose (out);
      fprintf (stderr, "Test image written to test/fttest.png\n");
    }
  /* Destroy it */
  gdImageDestroy (im);

  return 0;
#endif /* HAVE_LIBFREETYPE */
}