Hi, I've been playing with Cairo and DirectFB and I've written a very
small program which just starts up both and then shuts down.
Unfortunately, when I upgraded to DirectFB 1.1, my code stopped
working and now just hangs at a black screen.
Below is the code I'm using.. it SHOULD just open up and then exit.
I'm compiling with the command:
gcc -Wall -o cairo -L/usr/local/lib -ldirectfb -lcairo `pkg-config
--cflags directfb cairo` -DDEBUG main.c
#include <stdio.h>
#include <stdlib.h>
#include <cairo.h>
#include <cairo-directfb.h>
#include <directfb.h>
void cairo_init(cairo_t **gfx_context, cairo_surface_t **gfx_surface,
IDirectFB *dfb_context, IDirectFBSurface *dfb_surface);
void cairo_cleanup(cairo_t **gfx_context, cairo_surface_t **gfx_surface);
int main(int argc, char *argv[]) {
/* DirectFB variables */
IDirectFB *dfb_context = NULL;
IDirectFBSurface *dfb_surface = NULL;
DFBSurfaceDescription dfb_surface_opt;
/* Cairo variables */
cairo_surface_t *gfx_surface = NULL;
cairo_t *gfx_context = NULL;
/* Initialize DirectFB context */
DirectFBInit(&argc, &argv);
if (DirectFBCreate(&dfb_context) != DFB_OK)
exit(-1);
/* Set DirectFB surface options */
dfb_surface_opt.flags = DSDESC_CAPS | DSDESC_PIXELFORMAT |
DSDESC_WIDTH | DSDESC_HEIGHT;
dfb_surface_opt.caps = DSCAPS_PRIMARY;
dfb_surface_opt.pixelformat = DSPF_ARGB;
dfb_surface_opt.width = 1024;
dfb_surface_opt.height = 768;
/* Build primary DirectFB surface */
dfb_context->CreateSurface(dfb_context, &dfb_surface_opt, &dfb_surface);
/* Do Cairo operations */
cairo_init(&gfx_context, &gfx_surface, dfb_context, dfb_surface);
cairo_cleanup(&gfx_context, &gfx_surface);
/* Clean up DirectFB */
dfb_surface->Release(dfb_surface);
dfb_context->Release(dfb_context);
exit(0);
}
/* Create a primary Cairo context and surface */
void cairo_init(cairo_t **gfx_context, cairo_surface_t **gfx_surface,
IDirectFB *dfb_context, IDirectFBSurface *dfb_surface) {
/* Create a Cairo surface from a DirectFB context/surface */
*gfx_surface = cairo_directfb_surface_create(dfb_context, dfb_surface);
/* Make sure it worked */
if (cairo_surface_status(*gfx_surface) != CAIRO_STATUS_SUCCESS) {
printf("init gfx_surface failed: %s\n",
cairo_status_to_string(cairo_surface_status(*gfx_surface)));
cairo_cleanup(gfx_context, gfx_surface);
exit(-1);
}
/* Create a Cairo graphics context */
*gfx_context = cairo_create(*gfx_surface);
/* Make sure it worked */
if (cairo_status(*gfx_context) != CAIRO_STATUS_SUCCESS) {
printf("init gfx_context failed: %s\n",
cairo_status_to_string(cairo_status(*gfx_context)));
cairo_cleanup(gfx_context, gfx_surface);
exit(-1);
}
#ifdef DEBUG
printf("gfx_surface: %p\n", (void *) gfx_surface);
printf("gfx_context: %p\n", (void *) gfx_context);
#endif
}
/* Destroy the primary Cairo context and surface */
void cairo_cleanup(cairo_t **gfx_context, cairo_surface_t **gfx_surface) {
cairo_surface_destroy(*gfx_surface);
cairo_destroy(*gfx_context);
#ifdef DEBUG
/* Clean up for valgrind memcheck */
cairo_debug_reset_static_data();
#endif
*gfx_surface = NULL;
*gfx_context = NULL;
}
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