static gboolean
_cogl_blit_framebuffer_begin (CoglBlitData *data)
{
CoglHandle dst_fbo, src_fbo;
gboolean ret;
_COGL_GET_CONTEXT (ctx, FALSE);
/* We can only blit between FBOs if both textures are the same
format and the blit framebuffer extension is supported */
if ((cogl_texture_get_format (data->src_tex) & ~COGL_A_BIT) !=
(cogl_texture_get_format (data->dst_tex) & ~COGL_A_BIT) ||
!(ctx->private_feature_flags & COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT))
return FALSE;
dst_fbo = _cogl_offscreen_new_to_texture_full
(data->dst_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
if (dst_fbo == COGL_INVALID_HANDLE)
ret = FALSE;
else
{
if (!cogl_framebuffer_allocate (dst_fbo, NULL))
ret = FALSE;
else
{
src_fbo = _cogl_offscreen_new_to_texture_full
(data->src_tex,
COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL,
0 /* level */);
if (src_fbo == COGL_INVALID_HANDLE)
ret = FALSE;
else
{
if (!cogl_framebuffer_allocate (src_fbo, NULL))
ret = FALSE;
else
_cogl_push_framebuffers (dst_fbo, src_fbo);
cogl_handle_unref (src_fbo);
}
}
cogl_handle_unref (dst_fbo);
}
return ret;
}
static gboolean
_cogl_blit_copy_tex_sub_image_begin (CoglBlitData *data)
{
CoglHandle fbo;
_COGL_GET_CONTEXT (ctx, FALSE);
/* This will only work if the target texture is a CoglTexture2D */
if (!cogl_is_texture_2d (data->dst_tex))
return FALSE;
fbo = _cogl_offscreen_new_to_texture_full
(data->src_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
if (fbo == COGL_INVALID_HANDLE)
return FALSE;
if (!cogl_framebuffer_allocate (fbo, NULL))
{
cogl_handle_unref (fbo);
return FALSE;
}
cogl_push_framebuffer (fbo);
cogl_handle_unref (fbo);
return TRUE;
}
static void
cogland_compositor_create_output (CoglandCompositor *compositor,
int x,
int y,
int width_mm,
int height_mm)
{
CoglandOutput *output = g_slice_new0 (CoglandOutput);
CoglFramebuffer *fb;
CoglError *error = NULL;
CoglandMode *mode;
output->x = x;
output->y = y;
output->width_mm = width_mm;
output->height_mm = height_mm;
output->wayland_output.interface = &wl_output_interface;
wl_display_add_global (compositor->wayland_display,
&wl_output_interface,
output,
bind_output);
output->onscreen = cogl_onscreen_new (compositor->cogl_context,
width_mm, height_mm);
/* Eventually there will be an implicit allocate on first use so this
* will become optional... */
fb = output->onscreen;
if (!cogl_framebuffer_allocate (fb, &error))
g_error ("Failed to allocate framebuffer: %s\n", error->message);
cogl_onscreen_add_dirty_callback (output->onscreen,
dirty_cb,
compositor,
NULL /* destroy */);
cogl_onscreen_show (output->onscreen);
cogl_framebuffer_set_viewport (fb,
-x, -y,
compositor->virtual_width,
compositor->virtual_height);
mode = g_slice_new0 (CoglandMode);
mode->flags = 0;
mode->width = width_mm;
mode->height = height_mm;
mode->refresh = 60;
output->modes = g_list_prepend (output->modes, mode);
compositor->outputs = g_list_prepend (compositor->outputs, output);
}
struct wl_shell_surface *
cogl_wayland_onscreen_get_shell_surface (CoglOnscreen *onscreen)
{
CoglOnscreenEGL *egl_onscreen;
CoglOnscreenWayland *wayland_onscreen;
cogl_framebuffer_allocate (COGL_FRAMEBUFFER (onscreen), NULL);
egl_onscreen = onscreen->winsys;
wayland_onscreen = egl_onscreen->platform;
return wayland_onscreen->wayland_shell_surface;
}
SDL_Window *
cogl_sdl_onscreen_get_window (CoglOnscreen *onscreen)
{
CoglOnscreenSdl2 *sdl_onscreen;
_COGL_RETURN_VAL_IF_FAIL (cogl_is_onscreen (onscreen), NULL);
if (!cogl_framebuffer_allocate (COGL_FRAMEBUFFER (onscreen), NULL))
return NULL;
sdl_onscreen = onscreen->winsys;
return sdl_onscreen->window;
}
static void
texture_tower_revalidate_fbo (MetaTextureTower *tower,
int level)
{
CoglTexture *source_texture = tower->textures[level - 1];
int source_texture_width = cogl_texture_get_width (source_texture);
int source_texture_height = cogl_texture_get_height (source_texture);
CoglTexture *dest_texture = tower->textures[level];
int dest_texture_width = cogl_texture_get_width (dest_texture);
int dest_texture_height = cogl_texture_get_height (dest_texture);
Box *invalid = &tower->invalid[level];
CoglFramebuffer *fb;
CoglError *catch_error = NULL;
CoglPipeline *pipeline;
if (tower->fbos[level] == NULL)
tower->fbos[level] = cogl_offscreen_new_with_texture (dest_texture);
fb = COGL_FRAMEBUFFER (tower->fbos[level]);
if (!cogl_framebuffer_allocate (fb, &catch_error))
{
cogl_error_free (catch_error);
return;
}
cogl_framebuffer_orthographic (fb, 0, 0, dest_texture_width, dest_texture_height, -1., 1.);
if (!tower->pipeline_template)
{
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
tower->pipeline_template = cogl_pipeline_new (ctx);
cogl_pipeline_set_blend (tower->pipeline_template, "RGBA = ADD (SRC_COLOR, 0)", NULL);
}
pipeline = cogl_pipeline_copy (tower->pipeline_template);
cogl_pipeline_set_layer_texture (pipeline, 0, tower->textures[level - 1]);
cogl_framebuffer_draw_textured_rectangle (fb, pipeline,
invalid->x1, invalid->y1,
invalid->x2, invalid->y2,
(2. * invalid->x1) / source_texture_width,
(2. * invalid->y1) / source_texture_height,
(2. * invalid->x2) / source_texture_width,
(2. * invalid->y2) / source_texture_height);
cogl_object_unref (pipeline);
}
static void init()
{
CoglError *error = NULL;
CoglDisplay *display;
CoglRenderer *renderer;
CoglBool missing_requirement;
//g_setenv ("COGL_X11_SYNC", "1", 0);
test_ctx = cogl_context_new (NULL, &error);
if (!test_ctx) {
g_message ("Failed to create a CoglContext: %s", error->message);
exit(1);
}
display = cogl_context_get_display (test_ctx);
renderer = cogl_display_get_renderer (display);
if (!check_flags (renderer)) {
g_message ("WARNING: Missing required feature[s] for this test\n");
exit(1);
}
{
//TODO: get all monitors size to test
CoglOffscreen *offscreen;
CoglTexture2D *tex = cogl_texture_2d_new_with_size (test_ctx,
FB_WIDTH, FB_HEIGHT);
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (tex));
test_fb = COGL_FRAMEBUFFER (offscreen);
}
if (!cogl_framebuffer_allocate (test_fb, &error)) {
g_message ("Failed to allocate framebuffer: %s", error->message);
exit(1);
}
cogl_framebuffer_clear4f (test_fb,
COGL_BUFFER_BIT_COLOR |
COGL_BUFFER_BIT_DEPTH |
COGL_BUFFER_BIT_STENCIL,
0, 0, 0, 1);
}
static int test_init (TestData* data)
{
CoglOnscreen *onscreen;
GError *error = NULL;
CoglVertexP2C4 triangle_vertices[] = {
{0, 0.7, 0xff, 0x00, 0x00, 0x80},
{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
};
cogl_android_set_native_window (data->app->window);
data->context = cogl_context_new (NULL, &error);
if (!data->context)
{
g_critical ("Failed to create context: %s\n", error->message);
return 1;
}
onscreen = cogl_onscreen_new (data->context, 320, 420);
/* Eventually there will be an implicit allocate on first use so this
* will become optional... */
data->fb = COGL_FRAMEBUFFER (onscreen);
if (!cogl_framebuffer_allocate (data->fb, &error))
{
if (error)
g_critical ("Failed to allocate framebuffer: %s\n", error->message);
else
g_critical ("Failed to allocate framebuffer");
return 1;
}
cogl_onscreen_show (onscreen);
cogl_push_framebuffer (data->fb);
data->triangle = cogl_primitive_new_p2c4 (COGL_VERTICES_MODE_TRIANGLES,
3, triangle_vertices);
return 0;
}
void
_clutter_backend_reset_cogl_framebuffer (ClutterBackend *backend)
{
if (backend->dummy_onscreen == COGL_INVALID_HANDLE)
{
CoglError *internal_error = NULL;
backend->dummy_onscreen = cogl_onscreen_new (backend->cogl_context, 1, 1);
if (!cogl_framebuffer_allocate (COGL_FRAMEBUFFER (backend->dummy_onscreen),
&internal_error))
{
g_critical ("Unable to create dummy onscreen: %s", internal_error->message);
cogl_error_free (internal_error);
return;
}
}
cogl_set_framebuffer (COGL_FRAMEBUFFER (backend->dummy_onscreen));
}
static void
cogland_compositor_create_output (CoglandCompositor *compositor,
int x,
int y,
int width,
int height)
{
CoglandOutput *output = g_slice_new0 (CoglandOutput);
CoglFramebuffer *fb;
GError *error = NULL;
output->wayland_output.interface = &wl_output_interface;
wl_display_add_object (compositor->wayland_display, &output->wayland_output);
wl_display_add_global (compositor->wayland_display, &output->wayland_output,
cogland_output_post_geometry);
output->onscreen = cogl_onscreen_new (compositor->cogl_context,
width, height);
/* Eventually there will be an implicit allocate on first use so this
* will become optional... */
fb = COGL_FRAMEBUFFER (output->onscreen);
if (!cogl_framebuffer_allocate (fb, &error))
g_error ("Failed to allocate framebuffer: %s\n", error->message);
cogl_onscreen_show (output->onscreen);
#if 0
cogl_framebuffer_set_viewport (fb, x, y, width, height);
#else
cogl_push_framebuffer (fb);
cogl_set_viewport (-x, -y,
compositor->virtual_width,
compositor->virtual_height);
cogl_pop_framebuffer ();
#endif
compositor->outputs = g_list_prepend (compositor->outputs, output);
}
int
main (int argc, char **argv)
{
CoglOnscreenTemplate *onscreen_template;
CoglDisplay *display;
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
CoglError *error = NULL;
CoglVertexP2C4 triangle_vertices[] = {
{0, 0.7, 0xff, 0x00, 0x00, 0x80},
{-0.7, -0.7, 0x00, 0xff, 0x00, 0xff},
{0.7, -0.7, 0x00, 0x00, 0xff, 0xff}
};
CoglPrimitive *triangle;
CoglTexture *tex;
CoglOffscreen *offscreen;
CoglFramebuffer *offscreen_fb;
CoglPipeline *pipeline;
onscreen_template = cogl_onscreen_template_new (NULL);
cogl_onscreen_template_set_samples_per_pixel (onscreen_template, 4);
display = cogl_display_new (NULL, onscreen_template);
if (!cogl_display_setup (display, &error))
{
fprintf (stderr, "Platform doesn't support onscreen 4x msaa rendering: %s\n",
error->message);
return 1;
}
ctx = cogl_context_new (display, &error);
if (!ctx)
{
fprintf (stderr, "Failed to create context: %s\n", error->message);
return 1;
}
onscreen = cogl_onscreen_new (ctx, 640, 480);
fb = COGL_FRAMEBUFFER (onscreen);
cogl_framebuffer_set_samples_per_pixel (fb, 4);
if (!cogl_framebuffer_allocate (fb, &error))
{
fprintf (stderr, "Failed to allocate 4x msaa offscreen framebuffer, "
"disabling msaa for onscreen rendering: %s\n", error->message);
cogl_error_free (error);
cogl_framebuffer_set_samples_per_pixel (fb, 0);
error = NULL;
if (!cogl_framebuffer_allocate (fb, &error))
{
fprintf (stderr, "Failed to allocate framebuffer: %s\n", error->message);
return 1;
}
}
cogl_onscreen_show (onscreen);
tex = cogl_texture_new_with_size (ctx,
320, 480,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
offscreen = cogl_offscreen_new_to_texture (tex);
offscreen_fb = COGL_FRAMEBUFFER (offscreen);
cogl_framebuffer_set_samples_per_pixel (offscreen_fb, 4);
if (!cogl_framebuffer_allocate (offscreen_fb, &error))
{
cogl_error_free (error);
error = NULL;
fprintf (stderr, "Failed to allocate 4x msaa offscreen framebuffer, "
"disabling msaa for offscreen rendering");
cogl_framebuffer_set_samples_per_pixel (offscreen_fb, 0);
}
triangle = cogl_primitive_new_p2c4 (ctx, COGL_VERTICES_MODE_TRIANGLES,
3, triangle_vertices);
pipeline = cogl_pipeline_new (ctx);
for (;;) {
CoglPollFD *poll_fds;
int n_poll_fds;
int64_t timeout;
CoglPipeline *texture_pipeline;
cogl_framebuffer_clear4f (fb, COGL_BUFFER_BIT_COLOR, 0, 0, 0, 1);
cogl_framebuffer_push_matrix (fb);
cogl_framebuffer_scale (fb, 0.5, 1, 1);
cogl_framebuffer_translate (fb, -1, 0, 0);
cogl_framebuffer_draw_primitive (fb, pipeline, triangle);
cogl_framebuffer_pop_matrix (fb);
cogl_framebuffer_draw_primitive (fb, pipeline, triangle);
cogl_framebuffer_resolve_samples (offscreen_fb);
texture_pipeline = cogl_pipeline_new (ctx);
cogl_pipeline_set_layer_texture (texture_pipeline, 0, tex);
cogl_framebuffer_draw_rectangle (fb, texture_pipeline, 0, 1, 1, -1);
cogl_object_unref (texture_pipeline);
cogl_onscreen_swap_buffers (onscreen);
cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout);
g_poll ((GPollFD *) poll_fds, n_poll_fds, 0);
cogl_poll_dispatch (ctx, poll_fds, n_poll_fds);
}
return 0;
}
CoglPipeline *
_st_create_shadow_pipeline_from_actor (StShadow *shadow_spec,
ClutterActor *actor)
{
CoglPipeline *shadow_pipeline = NULL;
if (CLUTTER_IS_TEXTURE (actor))
{
CoglTexture *texture;
texture = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (actor));
shadow_pipeline = _st_create_shadow_pipeline (shadow_spec, texture);
}
else
{
CoglTexture *buffer;
CoglOffscreen *offscreen;
CoglFramebuffer *fb;
ClutterActorBox box;
CoglColor clear_color;
float width, height;
CoglError *catch_error = NULL;
clutter_actor_get_allocation_box (actor, &box);
clutter_actor_box_get_size (&box, &width, &height);
if (width == 0 || height == 0)
return NULL;
buffer = cogl_texture_new_with_size (width,
height,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
if (buffer == NULL)
return NULL;
offscreen = cogl_offscreen_new_with_texture (buffer);
fb = COGL_FRAMEBUFFER (offscreen);
if (!cogl_framebuffer_allocate (fb, &catch_error))
{
cogl_error_free (catch_error);
cogl_object_unref (buffer);
return NULL;
}
cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 0);
/* XXX: There's no way to render a ClutterActor to an offscreen
* as it uses the implicit API. */
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
cogl_push_framebuffer (fb);
G_GNUC_END_IGNORE_DEPRECATIONS;
cogl_framebuffer_clear (fb, COGL_BUFFER_BIT_COLOR, &clear_color);
cogl_framebuffer_translate (fb, -box.x1, -box.y1, 0);
cogl_framebuffer_orthographic (fb, 0, 0, width, height, 0, 1.0);
clutter_actor_set_opacity_override (actor, 255);
clutter_actor_paint (actor);
clutter_actor_set_opacity_override (actor, -1);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
cogl_pop_framebuffer ();
G_GNUC_END_IGNORE_DEPRECATIONS;
cogl_object_unref (fb);
shadow_pipeline = _st_create_shadow_pipeline (shadow_spec, buffer);
cogl_object_unref (buffer);
}
return shadow_pipeline;
}
static CoglHandle
data_to_cogl_handle (const guchar *data,
gboolean has_alpha,
int width,
int height,
int rowstride,
gboolean add_padding)
{
CoglHandle texture, offscreen;
CoglColor clear_color;
guint size;
GError *error;
size = MAX (width, height);
if (!add_padding || width == height)
return cogl_texture_new_from_data (width,
height,
COGL_TEXTURE_NONE,
has_alpha ? COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888,
COGL_PIXEL_FORMAT_ANY,
rowstride,
data);
texture = cogl_texture_new_with_size (size, size,
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY);
offscreen = cogl_offscreen_new_with_texture (texture);
error = NULL;
if (!cogl_framebuffer_allocate (offscreen, &error))
{
g_warning ("Failed to allocate FBO (sized %d): %s", size, error->message);
cogl_object_unref (texture);
cogl_object_unref (offscreen);
g_clear_error (&error);
return cogl_texture_new_from_data (width,
height,
COGL_TEXTURE_NONE,
has_alpha ? COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888,
COGL_PIXEL_FORMAT_ANY,
rowstride,
data);
}
cogl_color_set_from_4ub (&clear_color, 0, 0, 0, 0);
cogl_push_framebuffer (offscreen);
cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR);
cogl_pop_framebuffer ();
cogl_handle_unref (offscreen);
cogl_texture_set_region (texture,
0, 0,
(size - width) / 2, (size - height) / 2,
width, height,
width, height,
has_alpha ? COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888,
rowstride,
data);
return texture;
}
static gboolean
clutter_stage_win32_realize (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
ClutterBackend *backend;
ClutterBackendWin32 *backend_win32;
CoglFramebuffer *framebuffer;
gfloat width;
gfloat height;
GError *error = NULL;
CLUTTER_NOTE (MISC, "Realizing main stage");
backend = CLUTTER_BACKEND (stage_win32->backend);
backend_win32 = CLUTTER_BACKEND_WIN32 (backend);
clutter_actor_get_size (CLUTTER_ACTOR (stage_win32->wrapper),
&width, &height);
stage_win32->onscreen = cogl_onscreen_new (backend->cogl_context,
width, height);
if (stage_win32->hwnd == NULL)
{
ATOM window_class = clutter_stage_win32_get_window_class ();
int win_xpos, win_ypos, win_width, win_height;
if (window_class == 0)
{
g_critical ("Unable to register window class");
goto fail;
}
/* If we're in fullscreen mode then use the fullscreen rect
instead */
if (_clutter_stage_is_fullscreen (stage_win32->wrapper))
{
get_fullscreen_rect (stage_win32);
win_xpos = stage_win32->fullscreen_rect.left;
win_ypos = stage_win32->fullscreen_rect.top;
win_width = stage_win32->fullscreen_rect.right - win_xpos;
win_height = stage_win32->fullscreen_rect.bottom - win_ypos;
}
else
{
win_xpos = win_ypos = CW_USEDEFAULT;
get_full_window_size (stage_win32,
stage_win32->win_width,
stage_win32->win_height,
&win_width, &win_height);
}
if (stage_win32->wtitle == NULL)
stage_win32->wtitle = g_utf8_to_utf16 (".", -1, NULL, NULL, NULL);
stage_win32->hwnd = CreateWindowW ((LPWSTR) MAKEINTATOM (window_class),
stage_win32->wtitle,
get_window_style (stage_win32),
win_xpos,
win_ypos,
win_width,
win_height,
NULL, NULL,
GetModuleHandle (NULL),
NULL);
if (stage_win32->hwnd == NULL)
{
g_critical ("Unable to create stage window");
goto fail;
}
/* Store a pointer to the actor in the extra bytes of the window
so we can quickly access it in the window procedure */
SetWindowLongPtrW (stage_win32->hwnd, 0, (LONG_PTR) stage_win32);
}
cogl_win32_onscreen_set_foreign_window (stage_win32->onscreen,
stage_win32->hwnd);
cogl_onscreen_set_swap_throttled (stage_win32->onscreen,
_clutter_get_sync_to_vblank ());
framebuffer = COGL_FRAMEBUFFER (stage_win32->onscreen);
if (!cogl_framebuffer_allocate (framebuffer, &error))
{
g_warning ("Failed to allocate stage: %s", error->message);
g_error_free (error);
cogl_object_unref (stage_win32->onscreen);
stage_win32->onscreen = NULL;
goto fail;
}
/* Create a context. This will be a no-op if we already have one */
if (!_clutter_backend_create_context (CLUTTER_BACKEND (backend_win32),
&error))
{
g_critical ("Unable to realize stage: %s", error->message);
g_error_free (error);
goto fail;
}
CLUTTER_NOTE (BACKEND, "Successfully realized stage");
return TRUE;
fail:
return FALSE;
}
static gboolean
_cogl_blit_texture_render_begin (CoglBlitData *data)
{
CoglHandle fbo;
CoglPipeline *pipeline;
unsigned int dst_width, dst_height;
_COGL_GET_CONTEXT (ctx, FALSE);
fbo = _cogl_offscreen_new_to_texture_full
(data->dst_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
if (fbo == COGL_INVALID_HANDLE)
return FALSE;
if (!cogl_framebuffer_allocate (fbo, NULL))
{
cogl_handle_unref (fbo);
return FALSE;
}
cogl_push_framebuffer (fbo);
cogl_handle_unref (fbo);
dst_width = cogl_texture_get_width (data->dst_tex);
dst_height = cogl_texture_get_height (data->dst_tex);
/* Set up an orthographic projection so we can use pixel
coordinates to render to the texture */
cogl_ortho (0, /* left */
dst_width, /* right */
dst_height, /* bottom */
0, /* top */
-1, /* near */
1 /* far */);
/* We cache a pipeline used for migrating on to the context so
that it doesn't have to continuously regenerate a shader
program */
if (ctx->blit_texture_pipeline == NULL)
{
ctx->blit_texture_pipeline = cogl_pipeline_new ();
cogl_pipeline_set_layer_filters (ctx->blit_texture_pipeline, 0,
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
/* Disable blending by just directly taking the contents of the
source texture */
cogl_pipeline_set_blend (ctx->blit_texture_pipeline,
"RGBA = ADD(SRC_COLOR, 0)",
NULL);
}
pipeline = ctx->blit_texture_pipeline;
cogl_pipeline_set_layer_texture (pipeline, 0, data->src_tex);
_cogl_push_source (pipeline, FALSE);
return TRUE;
}
CoglOnscreen* ImGui_ImplGtk3Cogl_Init(GtkWidget* widget,
void (*callback)(CoglOnscreen *onscreen, void *data),
void *data)
{
g_clear_pointer(&g_GtkWidget, g_object_unref);
g_clear_pointer(&g_GdkWindow, g_object_unref);
g_clear_pointer(&g_Framebuffer, cogl_object_unref);
g_clear_pointer(&g_Context, cogl_object_unref);
g_GtkWidget = GTK_WIDGET(g_object_ref(widget));
gtk_widget_realize(widget);
GdkWindow *parent_window = gtk_widget_get_window(widget);
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
g_Callbacks = get_backend_callbacks(parent_window);
GdkWindowAttr attributes;
memset(&attributes, 0, sizeof(attributes));
attributes.x = 0;
attributes.y = 0;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = g_Callbacks->winsys == COGL_WINSYS_ID_EGL_WAYLAND ?
GDK_WINDOW_SUBSURFACE : GDK_WINDOW_CHILD;
GdkDisplay *display = gdk_window_get_display(parent_window);
attributes.visual = gtk_widget_get_visual(widget);
g_GdkWindow = gdk_window_new(parent_window, &attributes,
GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL);
gdk_window_set_transient_for(g_GdkWindow, parent_window);
gdk_window_set_pass_through(g_GdkWindow, TRUE);
cairo_rectangle_int_t empty_rect;
memset(&empty_rect, 0, sizeof(empty_rect));
cairo_region_t *input_region = cairo_region_create_rectangle(&empty_rect);
gdk_window_input_shape_combine_region(g_GdkWindow, input_region, 0, 0);
cairo_region_destroy(input_region);
cairo_region_t *region = get_window_region(g_GdkWindow);
gdk_window_set_opaque_region(g_GdkWindow, region);
cairo_region_destroy(region);
CoglRenderer *renderer = cogl_renderer_new();
cogl_renderer_set_winsys_id(renderer, g_Callbacks->winsys);
g_Callbacks->init(renderer, display, g_GdkWindow);
gdk_window_ensure_native(g_GdkWindow);
g_Context = cogl_context_new(cogl_display_new(renderer, NULL), NULL);
CoglOnscreen *onscreen = cogl_onscreen_new(g_Context, 1, 1);
cogl_object_unref(renderer);
g_Callbacks->resize(g_GdkWindow, onscreen,
allocation.width, allocation.height,
allocation.x, allocation.y);
gtk_widget_add_events(widget, EVENT_MASK);
g_signal_connect(widget, "event", G_CALLBACK(handle_gdk_event), NULL);
g_signal_connect(widget, "size-allocate", G_CALLBACK(handle_allocate), NULL);
g_Callbacks->set_window(onscreen, g_GdkWindow);
if (!cogl_framebuffer_allocate(COGL_FRAMEBUFFER(onscreen), NULL))
g_warning("Unable to allocate framebuffer");
g_Framebuffer = COGL_FRAMEBUFFER(onscreen);
ImGuiIO& io = ImGui::GetIO();
for (int i = 0; i < ImGuiKey_COUNT; i++)
{
io.KeyMap[i] = i;
}
io.SetClipboardTextFn = ImGui_ImplGtk3Cogl_SetClipboardText;
io.GetClipboardTextFn = ImGui_ImplGtk3Cogl_GetClipboardText;
io.ClipboardUserData = gtk_widget_get_clipboard(g_GtkWidget,
GDK_SELECTION_CLIPBOARD);
g_Callback = callback;
g_CallbackData = data;
GdkFrameClock *clock = gdk_window_get_frame_clock(g_GdkWindow);
g_signal_connect(clock, "paint", G_CALLBACK(handle_repaint), NULL);
gdk_frame_clock_request_phase(clock, GDK_FRAME_CLOCK_PHASE_PAINT);
gdk_window_show(g_GdkWindow);
return COGL_ONSCREEN(g_Framebuffer);
}
