Update DirectFB Backend

Jefferson Ferreira <[email protected]> Thu, 17 Apr 2014 15:15:55 -0300

Newsgroups	gmane.comp.lib.cairo
Message-ID	<CAF7VXs8bRWH8vZVGrKeDUUJguaq7i=ddxMX3DxieFn=z27550g@mail.gmail.com>

Please,

Someone knows how I can put this examples to work with the current cairo
with directfb ?

- change the backend in Makefile to "directfb"
https://github.com/msteinert/cairo-demo

- the other example is attached to this email

thanks in advance.

-- 
Jefferson Ferreira

-- 
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[email protected]
http://lists.cairographics.org/mailman/listinfo/cairo

teste.cpp (text/x-c++src, 2.4 KB)

// g++ simple.cpp `pkg-config --cflags --libs directfb cairo`
// ----------------------------------------- simple.cpp ---------------------------------------------
#include <stdio.h>
#include <unistd.h>

#include <directfb.h>
#include <cairo-directfb.h>

static int screen_width  = 720;
static int screen_height = 480;

int main (int argc, char **argv)
{
	// init dfb
	IDirectFB *dfb = NULL;
	IDirectFBDisplayLayer  *layer = NULL;
	DFBSurfaceDescription dsc;
	DFBDisplayLayerConfig  layer_dsc;

	DirectFBInit (&argc, &argv);
	DirectFBCreate (&dfb);

	dfb->GetDisplayLayer (dfb, DLID_PRIMARY, &layer);
	layer->SetCooperativeLevel (layer, DLSCL_ADMINISTRATIVE);

	layer_dsc.flags = DLCONF_BUFFERMODE;
	layer_dsc.buffermode = DLBM_BACKSYSTEM;
	layer->SetConfiguration (layer, &layer_dsc);

	// create window
	IDirectFBWindow *window = NULL;
	IDirectFBSurface *surface = NULL;
	DFBWindowDescription desc;

	desc.flags  = (DFBWindowDescriptionFlags)(DWDESC_POSX | DWDESC_POSY | DWDESC_WIDTH | DWDESC_HEIGHT | DWDESC_CAPS | DWDESC_PIXELFORMAT);
	desc.caps = (DFBWindowCapabilities)(DSCAPS_NONE | DWCAPS_ALPHACHANNEL);
	desc.pixelformat = DSPF_ARGB;
	desc.posx = 0;
	desc.posy = 0;
	desc.width  = screen_width;
	desc.height = screen_height;

	layer->CreateWindow (layer, &desc, &window);
	window->SetOpacity (window, 0x80);
	window->GetSurface (window, &surface);

	// drawing
	surface->SetColor (surface, 0x40, 0x60, 0x80, 0xff);
	surface->FillRectangle (surface, 0, 0, screen_width, screen_height);
	surface->SetColor (surface, 0x80, 0x80, 0xff, 0xff);
	surface->DrawLine (surface, 0, screen_height / 2, screen_width - 1, screen_height / 2);
	surface->SetColor (surface, 0x00, 0x00, 0xff, 0xa0);
	surface->FillRectangle (surface, 100, 100, 300, 300);
	surface->SetColor (surface, 0x80, 0x00, 0x00, 0xa0);
	surface->FillRectangle (surface, 200, 200, 300, 300);

	surface->Flip (surface, NULL, (DFBSurfaceFlipFlags)0);

	cairo_surface_t *cairo_surface;
	cairo_t *cairo_context;

	cairo_surface = cairo_directfb_surface_create(dfb, surface);
	cairo_context = cairo_create(cairo_surface);

	cairo_set_source_rgba(cairo_context, 0x80/255.0, 0x80/255.0, 0x80/255.0, 0xff/255.0);
	
	cairo_rectangle(cairo_context, 150, 150, 300, 300);
	cairo_fill(cairo_context);
	
	surface->Flip(surface, NULL, (DFBSurfaceFlipFlags)0);

	cairo_destroy(cairo_context);
	cairo_surface_destroy(cairo_surface);

	sleep (5);

	// release
	surface->Release( surface );
	dfb->Release( dfb );

	return 23;
}