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/*
* gxr
* Copyright 2018 Collabora Ltd.
* Author: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>
* SPDX-License-Identifier: MIT
*/
#include "cairo_content.h"
#include <gxr.h>
#define WIDTH 1280
#define HEIGHT 720
#define STRIDE (WIDTH * 4)
static GulkanTexture *texture;
static void
draw_cairo (cairo_t *cr, unsigned width, unsigned height)
{
draw_gradient_quad (cr, width, height);
draw_gradient_circle (cr, width, height);
}
static cairo_surface_t*
create_cairo_surface (unsigned char *image)
{
cairo_surface_t *surface =
cairo_image_surface_create_for_data (image,
CAIRO_FORMAT_ARGB32,
WIDTH, HEIGHT,
STRIDE);
cairo_t *cr = cairo_create (surface);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_fill (cr);
draw_cairo (cr, WIDTH, HEIGHT);
cairo_destroy (cr);
return surface;
}
static gboolean
timeout_callback (gpointer data)
{
GxrOverlay *overlay = (GxrOverlay*) data;
gxr_overlay_poll_event (overlay);
return TRUE;
}
static void
_press_cb (GxrOverlay *overlay,
GdkEventButton *event,
gpointer data)
{
(void) overlay;
g_print ("press: %d %f %f (%d)\n",
event->button, event->x, event->y, event->time);
GMainLoop *loop = (GMainLoop*) data;
g_main_loop_quit (loop);
}
static void
_show_cb (GxrOverlay *overlay,
gpointer data)
{
(void) data;
g_print ("show\n");
/* skip rendering if the overlay isn't available or visible */
gboolean is_invisible = !gxr_overlay_is_visible (overlay) &&
!gxr_overlay_thumbnail_is_visible (overlay);
if (is_invisible)
return;
gxr_overlay_submit_texture (overlay, texture);
}
static void
_destroy_cb (GxrOverlay *overlay,
gpointer data)
{
(void) overlay;
g_print ("destroy\n");
GMainLoop *loop = (GMainLoop*) data;
g_main_loop_quit (loop);
}
static int
test_cat_overlay ()
{
GMainLoop *loop;
unsigned char image[STRIDE*HEIGHT];
cairo_surface_t* surface = create_cairo_surface (image);
if (surface == NULL) {
fprintf (stderr, "Could not create cairo surface.\n");
return -1;
}
loop = g_main_loop_new (NULL, FALSE);
GxrContext *context = gxr_context_new (GXR_APP_OVERLAY, "Overlay Cairo", 1);
GulkanClient *gc = gxr_context_get_gulkan (context);
texture = gulkan_texture_new_from_cairo_surface (gc, surface,
VK_FORMAT_R8G8B8A8_UNORM,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
/* create openvr overlay */
GxrOverlay *overlay = gxr_overlay_new (context, "examples.cairo");
if (overlay == NULL)
{
fprintf (stderr, "Overlay unavailable.\n");
return -1;
}
gxr_overlay_set_mouse_scale (overlay, (float) WIDTH, (float) HEIGHT);
if (!gxr_overlay_show (overlay))
return -1;
gxr_overlay_submit_texture (overlay, texture);
g_signal_connect (overlay, "button-press-event", (GCallback) _press_cb, loop);
g_signal_connect (overlay, "show", (GCallback) _show_cb, NULL);
g_signal_connect (overlay, "destroy", (GCallback) _destroy_cb, loop);
g_timeout_add (20, timeout_callback, overlay);
g_main_loop_run (loop);
g_main_loop_unref (loop);
g_object_unref (overlay);
cairo_surface_destroy (surface);
g_object_unref (texture);
g_object_unref (context);
return 0;
}
int main () {
return test_cat_overlay ();
}
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