//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 
  
   
#include 
   
     #define ANGLE(ang)? (ang * 3.1415926 / 180.0) ? int main(int argc, char **argv) { ??? cairo_t *cr; ??? cairo_surface_t *surface; ??? int cheight = 400, 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; ??? //填充背景黑色 ??? 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(50, 50, 5, 50, 50, 50); //???? 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, 15); ??? 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, 10, 25); ??? cairo_show_text(cr, "你好"); ??? cairo_move_to(cr, 10, 75); ??? 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, 30, 10); ??? cairo_line_to(cr, 100, 80); ??? cairo_stroke(cr); ?? ? ??? cairo_move_to(cr, 30, 10); ??? cairo_line_to(cr, 230, 80); ??? 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, 15); ??? int cx = 250, cy = 250, R = 130; ??? 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; } 
   
  

Ubuntu下的编译:

g++ `pkg-config --cflags cairo` test_cairo.cpp `pkg-config --libs cairo`

注意:上面的符号`,不是单引号,而是键盘上ESC键的下面, !/1键的左边的按键.

运行结果: