Attachment 134800 Details for Bug 90166 – Example program for cairo_svg_surface_set_document_unit()

Example program for cairo_svg_surface_set_document_unit()

cairo_svg_surface_set_document_unit_example.c (text/x-csrc), 2.29 KB, created by Antonio Ospite on 2017-10-11 17:41:15 UTC

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Creator: Antonio Ospite

Created: 2017-10-11 17:41:15 UTC

Size: 2.29 KB

patch

obsolete

>/*
> * A test program for cairo_svg_surface_set_document_unit()
> * Copyright (C) 2017  Antonio Ospite <ao2@ao2.it>
> */
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <unistd.h>
>
>#include <cairo/cairo.h>
>#include <cairo/cairo-svg.h>
>
>#ifndef M_PI
>#define M_PI 3.14159265358979323846
>#endif
>
>static double width = 20;
>static double height = 20;
>
>static void draw(cairo_t *cr)
>{
>	cairo_rectangle(cr, 0.0, 0.0, width, height);
>	cairo_set_source_rgb(cr, 0.3, 0.6, 0.8);
>	cairo_fill(cr);
>
>	cairo_arc(cr, width / 2.0, width / 2.0, width / 2.0, 0, 2 * M_PI);
>	cairo_set_source_rgb(cr, 1, 1, 1);
>	cairo_stroke(cr);
>}
>
>static void check_status(cairo_surface_t * surface)
>{
>	cairo_status_t status;
>
>	status = cairo_surface_status(surface);
>	if (status != CAIRO_STATUS_SUCCESS) {
>		fprintf(stderr, "ERROR: %s.\n", cairo_status_to_string(status));
>		exit(EXIT_FAILURE);
>	}
>}
>
>static void set_svg_unit(cairo_surface_t *surface, cairo_svg_unit_t unit)
>{
>	cairo_svg_surface_set_document_unit(surface, unit);
>	check_status(surface);
>}
>
>static void save_svg(const char *filename, cairo_svg_unit_t unit)
>{
>	cairo_surface_t *surface;
>	cairo_t *cr;
>
>	surface = cairo_svg_surface_create(filename, width, height);
>
>	set_svg_unit(surface, unit);
>
>	cr = cairo_create(surface);
>	draw(cr);
>	cairo_destroy(cr);
>
>	cairo_surface_destroy(surface);
>}
>
>static void save_png(const char *filename)
>{
>	cairo_surface_t *surface;
>	cairo_t *cr;
>
>	surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
>
>	cr = cairo_create(surface);
>	draw(cr);
>	cairo_destroy(cr);
>
>	cairo_surface_write_to_png(surface, filename);
>	cairo_surface_destroy(surface);
>}
>
>int main(void)
>{
>	/* PNG output for comparison */
>	save_png("reference_output.png");
>
>	/* SVG output */
>	/* Is the usage of relative units (em, ex, %) well defined? */
>	save_svg("svg_output_em.svg", CAIRO_SVG_UNIT_EM);
>	save_svg("svg_output_ex.svg", CAIRO_SVG_UNIT_EX);
>	save_svg("svg_output_px.svg", CAIRO_SVG_UNIT_PX);
>	save_svg("svg_output_in.svg", CAIRO_SVG_UNIT_IN);
>	save_svg("svg_output_cm.svg", CAIRO_SVG_UNIT_CM);
>	save_svg("svg_output_mm.svg", CAIRO_SVG_UNIT_MM);
>	save_svg("svg_output_pt.svg", CAIRO_SVG_UNIT_PT);
>	save_svg("svg_output_pc.svg", CAIRO_SVG_UNIT_PC);
>	save_svg("svg_output_percent.svg", CAIRO_SVG_UNIT_PERCENT);
>	save_svg("svg_output_user.svg", CAIRO_SVG_UNIT_USER);
>
>	exit(EXIT_SUCCESS);
>}

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Attachments on bug 90166: 134799 | 134800 | 135226 | 135227

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