Cairo+glitz/Setup cairo

From Sidvind

Note: glitz support in cairo-1.8 is broken!

See cairo+glitz/Setup glitz with glx for details about getting glitz to work.

[edit] Cairo surface

One the glitz surface is created it is actually quite simple to have cairo use it as backend.

 // Create a cairo surface with glitz as backend.
 cairo_surface_t* pCairoSurface = cairo_glitz_surface_create (surface);
 
 // Create the cairo context as usual.
 cairo_t* cr = cairo_create (pCairoSurface);

[edit] Rendering sample

 // Clear the surface.
 cairo_scale(cr, 2.5, 2.5);
 cairo_set_source_rgba (cr, 1.0f, 1.0f, 1.0f, 1.0f);
 cairo_paint (cr);
 
 // Use default operator and color.
 cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
 cairo_set_source_rgba (cr, 0.0f, 0.0f, 0.0f, 1.0f);
 
 // This is one of the samples provided by the cairo documentation, see http://www.cairographics.org/samples/curve_to/
 double x=25.6,  y=128.0;
 double x1=102.4, y1=230.4,
        x2=153.6, y2=25.6,
        x3=230.4, y3=128.0;
 
 cairo_move_to (cr, x, y);
 cairo_curve_to (cr, x1, y1, x2, y2, x3, y3);
 
 cairo_set_line_width (cr, 10.0);
 cairo_stroke (cr);
 
 cairo_set_source_rgba (cr, 1, 0.2, 0.2, 0.6);
 cairo_set_line_width (cr, 6.0);
 cairo_move_to (cr,x,y);   cairo_line_to (cr,x1,y1);
 cairo_move_to (cr,x2,y2); cairo_line_to (cr,x3,y3);
 cairo_stroke (cr);
 
 // Swap buffers using glitz.
 glitz_drawable_swap_buffers(drawable);