Integrate with cairo-cogl

1 files changed, 83 insertions, 0 deletions

diff --git a/cogl.c b/cogl.c
new file mode 100644
index 0000000..48681fb
--- /dev/null
+++ b/cogl.c
@@ -0,0 +1,83 @@
+#include <cairo-cogl.h>
+
+#include "demo.h"
+
+#include <stdlib.h>
+
+#define container_of(ptr, type, member) ({ \
+    const __typeof__ (((type *) 0)->member) *mptr__ = (ptr); \
+    (type *) ((char *) mptr__ - offsetof (type, member)); \
+})
+
+struct cogl_device {
+    struct device base;
+    struct framebuffer fb;
+
+    CoglFramebuffer *cogl;
+    cairo_device_t *device;
+};
+
+static struct framebuffer *
+get_fb (struct device *abstract_device)
+{
+    struct cogl_device *device = (struct cogl_device *) abstract_device;
+
+    return &device->fb;
+}
+
+static struct cogl_device *
+get_device (struct framebuffer *fb)
+{
+    return container_of(fb, struct cogl_device, fb);
+}
+
+static void
+destroy (struct framebuffer *fb)
+{
+}
+
+static void
+show (struct framebuffer *fb)
+{
+    struct cogl_device *device = get_device (fb);
+
+    cairo_cogl_surface_end_frame (fb->surface);
+    cogl_framebuffer_swap_buffers (device->cogl);
+}
+
+struct device *
+cogl_open (int argc, char **argv)
+{
+	struct cogl_device *device;
+	CoglContext *context;
+	CoglOnscreen *onscreen;
+	int width = 800, height = 600;
+
+	device = malloc(sizeof(struct cogl_device));
+	device->base.name = "cogl";
+	device->base.get_framebuffer = get_fb;
+	device->base.width = width;
+	device->base.height = height;
+
+	device->fb.device = &device->base;
+	device->fb.show = show;
+	device->fb.destroy = destroy;
+
+	context = cogl_context_new (NULL, NULL);
+
+	device->device = cairo_cogl_device_create (context);
+	onscreen = cogl_onscreen_new (context, width, height);
+	device->cogl = COGL_FRAMEBUFFER (onscreen);
+
+	cogl_onscreen_show (onscreen);
+
+	cogl_push_framebuffer (device->cogl);
+	cogl_ortho (0, width, height, 0, -1, 100);
+	cogl_pop_framebuffer ();
+
+	device->base.scanout =
+		cairo_cogl_surface_create (device->device, device->cogl);
+	device->fb.surface = device->base.scanout;
+
+	return &device->base;
+}