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#include <gtk/gtk.h>
#include "gsk/ngl/gsknglrenderer.h"
/* This function will be called from a thread and/or the main loop.
* Textures are threadsafe after all. */
static void
ensure_texture_access (GdkTexture *texture)
{
/* Make sure to initialize the pixel to anything but red */
guint32 pixel = 0;
float float_pixel[4] = { INFINITY, INFINITY, INFINITY, INFINITY };
/* Just to be sure */
g_assert_cmpint (gdk_texture_get_width (texture), ==, 1);
g_assert_cmpint (gdk_texture_get_height (texture), ==, 1);
/* download the pixel */
gdk_texture_download (texture, (guchar *) &pixel, 4);
gdk_texture_download_float (texture, float_pixel, 4);
/* check the pixel is now red */
g_assert_cmphex (pixel, ==, 0xFFFF0000);
g_assert_cmpfloat (float_pixel[0], ==, 1.0);
g_assert_cmpfloat (float_pixel[1], ==, 0.0);
g_assert_cmpfloat (float_pixel[2], ==, 0.0);
g_assert_cmpfloat (float_pixel[3], ==, 1.0);
}
static void
texture_download_done (GObject *texture,
GAsyncResult *res,
gpointer loop)
{
ensure_texture_access (GDK_TEXTURE (texture));
g_main_loop_quit (loop);
}
static void
texture_download_thread (GTask *task,
gpointer texture,
gpointer unused,
GCancellable *cancellable)
{
ensure_texture_access (GDK_TEXTURE (texture));
g_task_return_boolean (task, TRUE);
}
static void
texture_threads (void)
{
GdkSurface *surface;
GskRenderer *gl_renderer;
GskRenderNode *node;
GMainLoop *loop;
GdkTexture *texture;
GTask *task;
/* 1. Get a GL renderer */
surface = gdk_surface_new_toplevel (gdk_display_get_default());
gl_renderer = gsk_ngl_renderer_new ();
g_assert_true (gsk_renderer_realize (gl_renderer, surface, NULL));
/* 2. Get a GL texture */
node = gsk_color_node_new (&(GdkRGBA) { 1, 0, 0, 1 }, &GRAPHENE_RECT_INIT(0, 0, 1, 1));
texture = gsk_renderer_render_texture (gl_renderer, node, &GRAPHENE_RECT_INIT(0, 0, 1, 1));
gsk_render_node_unref (node);
/* 3. This is a bit fishy, but we want to make sure that
* the texture's GL context is current in the main thread.
*
* If we had access to the context, we'd make_current() here.
*/
ensure_texture_access (texture);
g_assert_nonnull (gdk_gl_context_get_current ());
/* 4. Run a thread trying to download the texture */
loop = g_main_loop_new (NULL, TRUE);
task = g_task_new (texture, NULL, texture_download_done, loop);
g_task_run_in_thread (task, texture_download_thread);
g_clear_object (&task);
/* 5. Run the main loop waiting for the thread to return */
g_main_loop_run (loop);
/* 6. All good */
gsk_renderer_unrealize (gl_renderer);
g_clear_pointer (&loop, g_main_loop_unref);
g_clear_object (&gl_renderer);
g_clear_object (&surface);
}
int
main (int argc, char *argv[])
{
gtk_test_init (&argc, &argv, NULL);
g_test_add_func ("/texture-threads", texture_threads);
return g_test_run ();
}
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