Attachment 8514 Details for Bug 19481 – Simple test of libgd

Simple test of libgd

gdex.c (text/plain), 1.44 KB, created by Len Lawrence on 2016-10-12 00:19:19 CEST

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Creator: Len Lawrence

Created: 2016-10-12 00:19:19 CEST

Size: 1.44 KB

patch

obsolete

>/* Linking: */
>// gcc -lgd -lpng -lz -ljpeg -lfreetype -lm <program>
>
>/* Bring in gd library functions */
>#include "gd.h"
>
>/* Bring in standard I/O so we can output the PNG to a file */
>#include <stdio.h>
>
>int main() {
>  /* Declare the image */
>  gdImagePtr im;
>  /* Declare output files */
>  FILE *pngout, *jpegout;
>  /* Declare color indexes */
>  int black;
>  int white;
>
>  /* Allocate the image: 64 pixels across by 64 pixels tall */
>  im = gdImageCreate(64, 64);
>
>  /* Allocate the color black (red, green and blue all minimum).
>    Since this is the first color in a new image, it will
>    be the background color. */
>  black = gdImageColorAllocate(im, 0, 0, 0);
>
>  /* Allocate the color white (red, green and blue all maximum). */
>  white = gdImageColorAllocate(im, 255, 255, 255);
>
>  /* Draw a line from the upper left to the lower right,
>    using white color index. */
>  gdImageLine(im, 0, 0, 63, 63, white);
>
>  /* Open a file for writing. "wb" means "write binary", important
>    under MSDOS, harmless under Unix. */
>  pngout = fopen("test.png", "wb");
>
>  /* Do the same for a JPEG-format file. */
>  jpegout = fopen("test.jpg", "wb");
>
>  /* Output the image to the disk file in PNG format. */
>  gdImagePng(im, pngout);
>
>  /* Output the same image in JPEG format, using the default
>    JPEG quality setting. */
>  gdImageJpeg(im, jpegout, -1);
>
>  /* Close the files. */
>  fclose(pngout);
>  fclose(jpegout);
>
>  /* Destroy the image in memory. */
>  gdImageDestroy(im);
>}
>

/* Linking: */
// gcc -lgd -lpng -lz -ljpeg -lfreetype -lm <program>

/* Bring in gd library functions */
#include "gd.h"

/* Bring in standard I/O so we can output the PNG to a file */
#include <stdio.h>

int main() {
  /* Declare the image */
  gdImagePtr im;
  /* Declare output files */
  FILE *pngout, *jpegout;
  /* Declare color indexes */
  int black;
  int white;

  /* Allocate the image: 64 pixels across by 64 pixels tall */
  im = gdImageCreate(64, 64);

  /* Allocate the color black (red, green and blue all minimum).
    Since this is the first color in a new image, it will
    be the background color. */
  black = gdImageColorAllocate(im, 0, 0, 0);

  /* Allocate the color white (red, green and blue all maximum). */
  white = gdImageColorAllocate(im, 255, 255, 255);

  /* Draw a line from the upper left to the lower right,
    using white color index. */
  gdImageLine(im, 0, 0, 63, 63, white);

  /* Open a file for writing. "wb" means "write binary", important
    under MSDOS, harmless under Unix. */
  pngout = fopen("test.png", "wb");

  /* Do the same for a JPEG-format file. */
  jpegout = fopen("test.jpg", "wb");

  /* Output the image to the disk file in PNG format. */
  gdImagePng(im, pngout);

  /* Output the same image in JPEG format, using the default
    JPEG quality setting. */
  gdImageJpeg(im, jpegout, -1);

  /* Close the files. */
  fclose(pngout);
  fclose(jpegout);

  /* Destroy the image in memory. */
  gdImageDestroy(im);
}

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Attachments on bug 19481: 8514 | 8515