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/*
* gulkan
* Copyright 2020 Collabora Ltd.
* Author: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>
* SPDX-License-Identifier: MIT
*/
#include "plane-example.h"
#include "plane-renderer.h"
#define GLFW_INCLUDE_VULKAN
#include <GLFW/glfw3.h>
typedef struct _PlaneExamplePrivate
{
GObject parent;
GLFWwindow *window;
GMainLoop *loop;
PlaneRenderer *renderer;
gboolean should_quit;
GdkPixbuf *pixbuf;
GulkanTexture *texture;
} PlaneExamplePrivate;
G_DEFINE_TYPE_WITH_PRIVATE (PlaneExample, plane_example, G_TYPE_OBJECT)
static void
plane_example_init (PlaneExample *self)
{
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
priv->should_quit = FALSE;
priv->loop = g_main_loop_new (NULL, FALSE);
}
static void
_finalize (GObject *gobject)
{
PlaneExample *self = PLANE_EXAMPLE (gobject);
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
g_clear_object (&priv->texture);
g_main_loop_unref (priv->loop);
g_object_unref (priv->pixbuf);
g_object_unref (priv->renderer);
glfwDestroyWindow (priv->window);
glfwTerminate ();
G_OBJECT_CLASS (plane_example_parent_class)->finalize (gobject);
}
static void
plane_example_class_init (PlaneExampleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = _finalize;
}
static GdkPixbuf *
_load_pixbuf (const gchar* uri)
{
GError *error = NULL;
GdkPixbuf * pixbuf_no_alpha =
gdk_pixbuf_new_from_resource (uri, &error);
if (error != NULL) {
g_printerr ("Unable to read file: %s\n", error->message);
g_error_free (error);
return NULL;
} else {
GdkPixbuf *pixbuf = gdk_pixbuf_add_alpha (pixbuf_no_alpha, FALSE, 0, 0, 0);
g_object_unref (pixbuf_no_alpha);
return pixbuf;
}
}
static void
_key_cb (GLFWwindow* window, int key,
int scancode, int action, int mods)
{
(void) scancode;
(void) mods;
if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
{
PlaneExample *self = (PlaneExample*) glfwGetWindowUserPointer (window);
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
priv->should_quit = TRUE;
}
}
static void
_init_glfw (PlaneExample *self, int width, int height)
{
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
glfwInit();
glfwWindowHint (GLFW_CLIENT_API, GLFW_NO_API);
glfwWindowHint (GLFW_RESIZABLE, GLFW_FALSE);
priv->window = glfwCreateWindow (width, height, "Gulkan", NULL, NULL);
glfwSetKeyCallback (priv->window, _key_cb);
glfwSetWindowUserPointer (priv->window, self);
}
static gboolean
_draw_cb (gpointer data)
{
PlaneExample *self = (PlaneExample*) data;
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
glfwPollEvents ();
if (glfwWindowShouldClose (priv->window) || priv->should_quit)
{
g_main_loop_quit (priv->loop);
return FALSE;
}
gulkan_renderer_draw (GULKAN_RENDERER (priv->renderer));
GulkanClient *client =
gulkan_renderer_get_client (GULKAN_RENDERER (priv->renderer));
gulkan_device_wait_idle (gulkan_client_get_device (client));
return TRUE;
}
gboolean
plane_example_initialize (PlaneExample *self,
const gchar *pixbuf_uri,
GSList *instance_ext_list,
GSList *device_ext_list)
{
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
priv->pixbuf = _load_pixbuf (pixbuf_uri);
if (priv->pixbuf == NULL)
return FALSE;
gint width = gdk_pixbuf_get_width (priv->pixbuf);
gint height = gdk_pixbuf_get_height (priv->pixbuf);
_init_glfw (self, width / 2, height / 2);
uint32_t num_glfw_extensions = 0;
const char** glfw_extensions;
glfw_extensions = glfwGetRequiredInstanceExtensions (&num_glfw_extensions);
for (uint32_t i = 0; i < num_glfw_extensions; i++)
{
char *instance_ext = g_strdup (glfw_extensions[i]);
instance_ext_list = g_slist_append (instance_ext_list, instance_ext);
}
const gchar *device_extensions[] = {
VK_KHR_SWAPCHAIN_EXTENSION_NAME,
};
for (uint64_t i = 0; i < G_N_ELEMENTS (device_extensions); i++)
{
char *device_ext = g_strdup (device_extensions[i]);
device_ext_list = g_slist_append (device_ext_list, device_ext);
}
GulkanClient *client = gulkan_client_new_from_extensions (instance_ext_list,
device_ext_list);
priv->renderer = plane_renderer_new_from_client (client);
if (!priv->renderer)
{
g_printerr ("Unable to init plane renderer!\n");
return FALSE;
}
g_slist_free (instance_ext_list);
g_slist_free (device_ext_list);
VkInstance instance = gulkan_client_get_instance_handle (client);
VkSurfaceKHR surface;
VkResult res = glfwCreateWindowSurface (instance,
priv->window, NULL,
&surface);
vk_check_error ("glfwCreateWindowSurface", res, FALSE);
g_object_unref (client);
PlaneExampleClass *klass = PLANE_EXAMPLE_GET_CLASS (self);
if (klass->init_texture == NULL)
return FALSE;
priv->texture = klass->init_texture (self, client, priv->pixbuf);
if (!priv->texture)
return FALSE;
if (!plane_renderer_initialize (priv->renderer,
surface,
priv->texture))
return FALSE;
return TRUE;
}
void
plane_example_run (PlaneExample *self)
{
PlaneExamplePrivate *priv = plane_example_get_instance_private (self);
g_timeout_add (1, _draw_cb, self);
g_main_loop_run (priv->loop);
}
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