C + + Cairo drawing graphics based on Vector graphics library

Source: Internet
Author: User
Tags cairo vector graphics library

sudo apt-get install libcairo2-dev//pkg-config--cflags--libs cairo//-i/usr/include/cairo-i/usr/include/glib-2.0- I/usr/lib/x86_64-linux-gnu/glib-2.0/include-i/usr/include/pixman-1-i/usr/include/freetype2-i/usr/include/ libpng12 -lcairo#include <iostream> #include <cairo-svg.h> #define ANGLE (ANG)   (ANG * 3.1415926/ 180.0)  int Main (int argc, char **argv) {    cairo_t *cr;    cairo_surface_t *surface ;    int cheight = Cwidth = cheight;    Surface = (cairo_surface_t *) cairo_svg_surface _create ("Cairo_example.svg", Cheight, cwidth);    cr = Cairo_create (surface);             cairo_pattern_t *pattern;    cairo_text_extents_t text;         int x,y;   //fill background black     cairo_set_source_rgb (CR, 0, 0, 0 );    Cairo_rectangle (CR, 0, 0, cwidth, cheight);    Cairo_fill (CR);//     Cairo_set_source_rgb (CR, 0.5, 0.5, 0.5);//      Pattern = cairo_pattern_create_radial (5,,);//     Cairo_pattern_add_color_ Stop_rgb (pattern, 0, 0.75, 0.15, 0.99);//     Cairo_pattern_add_color_stop_rgb (pattern, 0.9, 1, 1, 1);//     Cairo_set_source (CR, pattern);//     Cairo_fill (CR);        /* Writing in the foreground */    cairo_set_font_size (CR, n);  & nbsp;  Cairo_select_font_face (CR, "Georgia", Cairo_font_slant_normal, Cairo_font_weight_bold);        Cairo_set_source_rgb (CR, 0, 0, 1);    cairo_move_to (CR, n);   & nbsp Cairo_show_text (CR, "Hello");    cairo_move_to (CR, ten, page);    Cairo_show_text (CR, " Wikipedia! ");             CAIro_set_source_rgb (CR, 0, 1, 0);    Cairo_set_antialias (CR, Cairo_antialias_good);    Cairo_set_line_width (CR, 2);    cairo_move_to (CR, 100, 80);    cairo_line_to (CR );    Cairo_stroke (CR);        cairo_move_to (CR, Max);     Cairo_line_to (CR, +);    Cairo_stroke (CR);        Cairo_ rectangle_int_t rect;    rect.x = 200;    Rect.y = 200;    Rect.width = 180 ;    rect.height = 160;    cairo_rectangle (CR, Rect.x, Rect.y, Rect.width, rect.height);     Cairo_stroke (CR);   //cairo_fill (CR);        Cairo_set_source_rgba (CR, 1, 0, 1, 0.5);      Cairo_set_line_width (CR, +);    int cx =, cy = +, R = 130;  &nbsp ; Cairo_arc (CR, CX, CY, R, ANGLE (0), ANGLE (360));      Cairo_stroke (CR);        Cairo_surface_write_to_png ( Surface, "demo1.png");        Cairo_destroy (CR);    Cairo_surface_ Destroy (surface);        return 0;}

Compilation under Ubuntu:

g++ ' Pkg-config--cflags Cairo ' test_cairo.cpp ' Pkg-config--libs Cairo '

Note: The above symbol is not a single quote, but the key to the left of the ESC key on the keyboard and the!/1 key.

Operation Result:

C + + Cairo drawing graphics based on Vector graphics library

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