Cairo
Documentation
2D graphics library with support for multiple output devices. It can be used to draw on multiple different surfaces, such as the FB graphics window, in-memory pixel buffers, a GTK+ widget or a Win32 window or device context.Website: http://www.cairographics.org
Platforms supported: Win32, Linux
Headers to include: cairo/cairo.bi
Header version: 1.14.2
Examples: yes, in examples/graphics/cairo/
Example
'' Example showing cairo being used to draw into the FB graphics window
#include Once "cairo/cairo.bi"
Const SCREEN_W = 400
Const SCREEN_H = 300
ScreenRes SCREEN_W, SCREEN_H, 32
'' Create a cairo drawing context, using the FB screen as surface.
Var surface = cairo_image_surface_create_for_data(ScreenPtr(), CAIRO_FORMAT_ARGB32, SCREEN_W, SCREEN_H, SCREEN_W * SizeOf(ULong))
Var c = cairo_create(surface)
ScreenLock()
'' Draw the entire context white.
cairo_set_source_rgba(c, 1, 1, 1, 1)
cairo_paint(c)
'' Draw a red line
cairo_set_line_width(c, 1)
cairo_set_source_rgba(c, 1, 0, 0, 1)
cairo_move_to(c, 0, 0)
cairo_line_to(c, SCREEN_W - 1, SCREEN_H - 1)
cairo_stroke(c)
ScreenUnlock()
Sleep
'' Clean up the cairo context
cairo_destroy(c)
last reviewed: MrSwiss, 2018-05-05 -- changed: SizeOf(Integer) to SizeOf(ULong) reason: 32/64 compatibility