Attachment 1488576 Details for Bug 1634394 – sample code ctest3.c

sample code ctest3.c

ctest3.c (text/x-csrc), 1.10 KB, created by Alois Treindl on 2018-09-30 13:57:31 UTC

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Creator: Alois Treindl

Created: 2018-09-30 13:57:31 UTC

Size: 1.10 KB

patch

obsolete

>// sample code to demonstrate bug in cairo
>#include <cairo.h>
>#include <stdio.h>
>
>static void measure(cairo_t *cr, char *s)
>{
>	cairo_text_extents_t exts;
>	cairo_text_extents(cr, "Some text", &exts);
>
>	printf("%s Size: %gx%g", s, exts.width, exts.height);
>}
>
>int main()
>{
>  int i; 
>  char t[80];
>  double pt;
>
>  // create PDF surfece
>  cairo_surface_t *s = cairo_pdf_surface_create("test.pdf", 1000, 1000);
>  cairo_t *cr = cairo_create(s);
>
>  // set option CAIRO_HINT_METRICS_OFF
>  // this steps is irrlevant for PDF surface, but to show same effect in
>  // bitmap surface, it has to be included.
>  cairo_font_options_t *opt = cairo_font_options_create();
>  cairo_get_font_options(cr, opt);
>  cairo_font_options_set_hint_metrics(opt, CAIRO_HINT_METRICS_OFF);
>  cairo_set_font_options(cr, opt);
>
>  // loop font size from 9.0 to 10.o pt in stepsof 0.1 pt
>  for (i = 90; i <= 100; i++) {
>    pt = i * 0.1;
>    cairo_set_font_size(cr, pt);
>    sprintf(t, "%.1lf pt\t", pt);
>    measure(cr, t);
>    printf("\n");
>  }
>
>  // cleanup
>  cairo_font_options_destroy(opt);
>  cairo_destroy(cr);
>  cairo_surface_destroy(s);
>  return 0;
>}

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Attachments on bug 1634394: 1488576