| /* |
| * GStreamer |
| * Copyright (C) 2015 Matthew Waters <matthew@centricular.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <stdio.h> |
| |
| #include "gtkgstglwidget.h" |
| #include "gstgtkutils.h" |
| #include <gst/video/video.h> |
| |
| #if GST_GL_HAVE_WINDOW_X11 && GST_GL_HAVE_PLATFORM_GLX && defined (GDK_WINDOWING_X11) |
| #include <gdk/gdkx.h> |
| #include <gst/gl/x11/gstgldisplay_x11.h> |
| #include <gst/gl/x11/gstglcontext_glx.h> |
| #endif |
| |
| #if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (GDK_WINDOWING_WAYLAND) |
| #include <gdk/gdkwayland.h> |
| #include <gst/gl/wayland/gstgldisplay_wayland.h> |
| #endif |
| |
| /** |
| * SECTION:gtkgstglwidget |
| * @title: GtkGstGlWidget |
| * @short_description: a #GtkGLArea that renders GStreamer video #GstBuffers |
| * @see_also: #GtkGLArea, #GstBuffer |
| * |
| * #GtkGstGLWidget is an #GtkWidget that renders GStreamer video buffers. |
| */ |
| |
| #define GST_CAT_DEFAULT gtk_gst_gl_widget_debug |
| GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); |
| |
| G_DEFINE_TYPE_WITH_CODE (GtkGstGLWidget, gtk_gst_gl_widget, GTK_TYPE_GL_AREA, |
| GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "gtkgstglwidget", 0, |
| "Gtk Gst GL Widget");); |
| |
| #define GTK_GST_GL_WIDGET_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \ |
| GTK_TYPE_GST_GL_WIDGET, GtkGstGLWidgetPrivate)) |
| |
| struct _GtkGstGLWidgetPrivate |
| { |
| gboolean initted; |
| GstGLDisplay *display; |
| GdkGLContext *gdk_context; |
| GstGLContext *other_context; |
| GstGLContext *context; |
| GstGLUpload *upload; |
| GstGLShader *shader; |
| GLuint vao; |
| GLuint vertex_buffer; |
| GLint attr_position; |
| GLint attr_texture; |
| GLuint current_tex; |
| GstGLOverlayCompositor *overlay_compositor; |
| }; |
| |
| static const GLfloat vertices[] = { |
| 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, |
| -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, |
| -1.0f, -1.0f, 0.0f, 0.0f, 1.0f, |
| 1.0f, -1.0f, 0.0f, 1.0f, 1.0f |
| }; |
| |
| static void |
| gtk_gst_gl_widget_bind_buffer (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| const GstGLFuncs *gl = priv->context->gl_vtable; |
| |
| gl->BindBuffer (GL_ARRAY_BUFFER, priv->vertex_buffer); |
| |
| /* Load the vertex position */ |
| gl->VertexAttribPointer (priv->attr_position, 3, GL_FLOAT, GL_FALSE, |
| 5 * sizeof (GLfloat), (void *) 0); |
| |
| /* Load the texture coordinate */ |
| gl->VertexAttribPointer (priv->attr_texture, 2, GL_FLOAT, GL_FALSE, |
| 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat))); |
| |
| gl->EnableVertexAttribArray (priv->attr_position); |
| gl->EnableVertexAttribArray (priv->attr_texture); |
| } |
| |
| static void |
| gtk_gst_gl_widget_unbind_buffer (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| const GstGLFuncs *gl = priv->context->gl_vtable; |
| |
| gl->BindBuffer (GL_ARRAY_BUFFER, 0); |
| |
| gl->DisableVertexAttribArray (priv->attr_position); |
| gl->DisableVertexAttribArray (priv->attr_texture); |
| } |
| |
| static void |
| gtk_gst_gl_widget_init_redisplay (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| const GstGLFuncs *gl = priv->context->gl_vtable; |
| GError *error = NULL; |
| |
| gst_gl_insert_debug_marker (priv->other_context, "initializing redisplay"); |
| if (!(priv->shader = gst_gl_shader_new_default (priv->context, &error))) { |
| GST_ERROR ("Failed to initialize shader: %s", error->message); |
| return; |
| } |
| |
| priv->attr_position = |
| gst_gl_shader_get_attribute_location (priv->shader, "a_position"); |
| priv->attr_texture = |
| gst_gl_shader_get_attribute_location (priv->shader, "a_texcoord"); |
| |
| if (gl->GenVertexArrays) { |
| gl->GenVertexArrays (1, &priv->vao); |
| gl->BindVertexArray (priv->vao); |
| } |
| |
| gl->GenBuffers (1, &priv->vertex_buffer); |
| gl->BindBuffer (GL_ARRAY_BUFFER, priv->vertex_buffer); |
| gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices, |
| GL_STATIC_DRAW); |
| |
| if (gl->GenVertexArrays) { |
| gtk_gst_gl_widget_bind_buffer (gst_widget); |
| gl->BindVertexArray (0); |
| } |
| |
| gl->BindBuffer (GL_ARRAY_BUFFER, 0); |
| |
| priv->overlay_compositor = |
| gst_gl_overlay_compositor_new (priv->other_context); |
| |
| priv->initted = TRUE; |
| } |
| |
| static void |
| _redraw_texture (GtkGstGLWidget * gst_widget, guint tex) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| const GstGLFuncs *gl = priv->context->gl_vtable; |
| const GLushort indices[] = { 0, 1, 2, 0, 2, 3 }; |
| |
| if (gst_widget->base.force_aspect_ratio) { |
| GstVideoRectangle src, dst, result; |
| gint widget_width, widget_height, widget_scale; |
| |
| gl->ClearColor (0.0, 0.0, 0.0, 0.0); |
| gl->Clear (GL_COLOR_BUFFER_BIT); |
| |
| widget_scale = gtk_widget_get_scale_factor ((GtkWidget *) gst_widget); |
| widget_width = gtk_widget_get_allocated_width ((GtkWidget *) gst_widget); |
| widget_height = gtk_widget_get_allocated_height ((GtkWidget *) gst_widget); |
| |
| src.x = 0; |
| src.y = 0; |
| src.w = gst_widget->base.display_width; |
| src.h = gst_widget->base.display_height; |
| |
| dst.x = 0; |
| dst.y = 0; |
| dst.w = widget_width * widget_scale; |
| dst.h = widget_height * widget_scale; |
| |
| gst_video_sink_center_rect (src, dst, &result, TRUE); |
| |
| gl->Viewport (result.x, result.y, result.w, result.h); |
| } |
| |
| gst_gl_shader_use (priv->shader); |
| |
| if (gl->BindVertexArray) |
| gl->BindVertexArray (priv->vao); |
| gtk_gst_gl_widget_bind_buffer (gst_widget); |
| |
| gl->ActiveTexture (GL_TEXTURE0); |
| gl->BindTexture (GL_TEXTURE_2D, tex); |
| gst_gl_shader_set_uniform_1i (priv->shader, "tex", 0); |
| |
| gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices); |
| |
| if (gl->BindVertexArray) |
| gl->BindVertexArray (0); |
| gtk_gst_gl_widget_unbind_buffer (gst_widget); |
| |
| gl->BindTexture (GL_TEXTURE_2D, 0); |
| } |
| |
| static inline void |
| _draw_black (GstGLContext * context) |
| { |
| const GstGLFuncs *gl = context->gl_vtable; |
| |
| gst_gl_insert_debug_marker (context, "no buffer. rendering black"); |
| gl->ClearColor (0.0, 0.0, 0.0, 0.0); |
| gl->Clear (GL_COLOR_BUFFER_BIT); |
| } |
| |
| static gboolean |
| gtk_gst_gl_widget_render (GtkGLArea * widget, GdkGLContext * context) |
| { |
| GtkGstGLWidgetPrivate *priv = GTK_GST_GL_WIDGET (widget)->priv; |
| GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (widget); |
| |
| GTK_GST_BASE_WIDGET_LOCK (widget); |
| |
| if (!priv->context || !priv->other_context) |
| goto done; |
| |
| gst_gl_context_activate (priv->other_context, TRUE); |
| |
| if (!priv->initted) |
| gtk_gst_gl_widget_init_redisplay (GTK_GST_GL_WIDGET (widget)); |
| |
| if (!priv->initted || !base_widget->negotiated) { |
| _draw_black (priv->other_context); |
| goto done; |
| } |
| |
| /* Upload latest buffer */ |
| if (base_widget->pending_buffer) { |
| GstBuffer *buffer = base_widget->pending_buffer; |
| GstVideoFrame gl_frame; |
| GstGLSyncMeta *sync_meta; |
| |
| if (!gst_video_frame_map (&gl_frame, &base_widget->v_info, buffer, |
| GST_MAP_READ | GST_MAP_GL)) { |
| _draw_black (priv->other_context); |
| goto done; |
| } |
| |
| priv->current_tex = *(guint *) gl_frame.data[0]; |
| gst_gl_insert_debug_marker (priv->other_context, "redrawing texture %u", |
| priv->current_tex); |
| |
| gst_gl_overlay_compositor_upload_overlays (priv->overlay_compositor, |
| buffer); |
| |
| sync_meta = gst_buffer_get_gl_sync_meta (buffer); |
| if (sync_meta) { |
| /* XXX: the set_sync() seems to be needed for resizing */ |
| gst_gl_sync_meta_set_sync_point (sync_meta, priv->context); |
| gst_gl_sync_meta_wait (sync_meta, priv->other_context); |
| } |
| |
| gst_video_frame_unmap (&gl_frame); |
| |
| if (base_widget->buffer) |
| gst_buffer_unref (base_widget->buffer); |
| |
| /* Keep the buffer to ensure current_tex stay valid */ |
| base_widget->buffer = buffer; |
| base_widget->pending_buffer = NULL; |
| } |
| |
| GST_DEBUG ("rendering buffer %p with gdk context %p", |
| base_widget->buffer, context); |
| |
| _redraw_texture (GTK_GST_GL_WIDGET (widget), priv->current_tex); |
| gst_gl_overlay_compositor_draw_overlays (priv->overlay_compositor); |
| |
| gst_gl_insert_debug_marker (priv->other_context, "texture %u redrawn", |
| priv->current_tex); |
| |
| done: |
| if (priv->other_context) |
| gst_gl_context_activate (priv->other_context, FALSE); |
| |
| GTK_GST_BASE_WIDGET_UNLOCK (widget); |
| return FALSE; |
| } |
| |
| static void |
| _reset_gl (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| const GstGLFuncs *gl = priv->other_context->gl_vtable; |
| |
| if (!priv->gdk_context) |
| priv->gdk_context = gtk_gl_area_get_context (GTK_GL_AREA (gst_widget)); |
| |
| if (priv->gdk_context == NULL) |
| return; |
| |
| gdk_gl_context_make_current (priv->gdk_context); |
| gst_gl_context_activate (priv->other_context, TRUE); |
| |
| if (priv->vao) { |
| gl->DeleteVertexArrays (1, &priv->vao); |
| priv->vao = 0; |
| } |
| |
| if (priv->vertex_buffer) { |
| gl->DeleteBuffers (1, &priv->vertex_buffer); |
| priv->vertex_buffer = 0; |
| } |
| |
| if (priv->upload) { |
| gst_object_unref (priv->upload); |
| priv->upload = NULL; |
| } |
| |
| if (priv->shader) { |
| gst_object_unref (priv->shader); |
| priv->shader = NULL; |
| } |
| |
| if (priv->overlay_compositor) |
| gst_object_unref (priv->overlay_compositor); |
| |
| gst_gl_context_activate (priv->other_context, FALSE); |
| |
| gst_object_unref (priv->other_context); |
| priv->other_context = NULL; |
| |
| gdk_gl_context_clear_current (); |
| |
| g_object_unref (priv->gdk_context); |
| priv->gdk_context = NULL; |
| } |
| |
| static void |
| gtk_gst_gl_widget_finalize (GObject * object) |
| { |
| GtkGstGLWidgetPrivate *priv = GTK_GST_GL_WIDGET (object)->priv; |
| GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (object); |
| |
| if (priv->other_context) |
| gst_gtk_invoke_on_main ((GThreadFunc) _reset_gl, base_widget); |
| |
| if (priv->context) |
| gst_object_unref (priv->context); |
| |
| if (priv->display) |
| gst_object_unref (priv->display); |
| |
| gtk_gst_base_widget_finalize (object); |
| G_OBJECT_CLASS (gtk_gst_gl_widget_parent_class)->finalize (object); |
| } |
| |
| static void |
| gtk_gst_gl_widget_class_init (GtkGstGLWidgetClass * klass) |
| { |
| GObjectClass *gobject_klass = (GObjectClass *) klass; |
| GtkGLAreaClass *gl_widget_klass = (GtkGLAreaClass *) klass; |
| |
| g_type_class_add_private (klass, sizeof (GtkGstGLWidgetPrivate)); |
| gtk_gst_base_widget_class_init (GTK_GST_BASE_WIDGET_CLASS (klass)); |
| |
| gobject_klass->finalize = gtk_gst_gl_widget_finalize; |
| gl_widget_klass->render = gtk_gst_gl_widget_render; |
| } |
| |
| static void |
| gtk_gst_gl_widget_init (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstBaseWidget *base_widget = GTK_GST_BASE_WIDGET (gst_widget); |
| GdkDisplay *display; |
| GtkGstGLWidgetPrivate *priv; |
| |
| gtk_gst_base_widget_init (base_widget); |
| |
| gst_widget->priv = priv = GTK_GST_GL_WIDGET_GET_PRIVATE (gst_widget); |
| |
| display = gdk_display_get_default (); |
| |
| #if GST_GL_HAVE_WINDOW_X11 && GST_GL_HAVE_PLATFORM_GLX && defined (GDK_WINDOWING_X11) |
| if (GDK_IS_X11_DISPLAY (display)) |
| priv->display = (GstGLDisplay *) |
| gst_gl_display_x11_new_with_display (gdk_x11_display_get_xdisplay |
| (display)); |
| #endif |
| #if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (GDK_WINDOWING_WAYLAND) |
| if (GDK_IS_WAYLAND_DISPLAY (display)) { |
| struct wl_display *wayland_display = |
| gdk_wayland_display_get_wl_display (display); |
| priv->display = (GstGLDisplay *) |
| gst_gl_display_wayland_new_with_display (wayland_display); |
| } |
| #endif |
| |
| (void) display; |
| |
| if (!priv->display) |
| priv->display = gst_gl_display_new (); |
| |
| gtk_gl_area_set_has_alpha (GTK_GL_AREA (gst_widget), |
| !base_widget->ignore_alpha); |
| } |
| |
| static void |
| _get_gl_context (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| GstGLPlatform platform; |
| GstGLAPI gl_api; |
| guintptr gl_handle; |
| |
| gtk_widget_realize (GTK_WIDGET (gst_widget)); |
| |
| if (priv->other_context) |
| gst_object_unref (priv->other_context); |
| priv->other_context = NULL; |
| |
| if (priv->gdk_context) |
| g_object_unref (priv->gdk_context); |
| |
| priv->gdk_context = gtk_gl_area_get_context (GTK_GL_AREA (gst_widget)); |
| if (priv->gdk_context == NULL) { |
| GError *error = gtk_gl_area_get_error (GTK_GL_AREA (gst_widget)); |
| |
| GST_ERROR_OBJECT (gst_widget, "Error creating GdkGLContext : %s", |
| error ? error->message : "No error set by Gdk"); |
| g_clear_error (&error); |
| return; |
| } |
| |
| g_object_ref (priv->gdk_context); |
| |
| gdk_gl_context_make_current (priv->gdk_context); |
| |
| #if GST_GL_HAVE_WINDOW_X11 && GST_GL_HAVE_PLATFORM_GLX && defined (GDK_WINDOWING_X11) |
| if (GST_IS_GL_DISPLAY_X11 (priv->display)) { |
| platform = GST_GL_PLATFORM_GLX; |
| gl_api = gst_gl_context_get_current_gl_api (platform, NULL, NULL); |
| gl_handle = gst_gl_context_get_current_gl_context (platform); |
| if (gl_handle) |
| priv->other_context = |
| gst_gl_context_new_wrapped (priv->display, gl_handle, |
| platform, gl_api); |
| } |
| #endif |
| #if GST_GL_HAVE_WINDOW_WAYLAND && GST_GL_HAVE_PLATFORM_EGL && defined (GDK_WINDOWING_WAYLAND) |
| if (GST_IS_GL_DISPLAY_WAYLAND (priv->display)) { |
| platform = GST_GL_PLATFORM_EGL; |
| gl_api = gst_gl_context_get_current_gl_api (platform, NULL, NULL); |
| gl_handle = gst_gl_context_get_current_gl_context (platform); |
| if (gl_handle) |
| priv->other_context = |
| gst_gl_context_new_wrapped (priv->display, gl_handle, |
| platform, gl_api); |
| } |
| #endif |
| |
| (void) platform; |
| (void) gl_api; |
| (void) gl_handle; |
| |
| if (priv->other_context) { |
| GError *error = NULL; |
| |
| gst_gl_context_activate (priv->other_context, TRUE); |
| if (!gst_gl_context_fill_info (priv->other_context, &error)) { |
| GST_ERROR ("failed to retrieve gdk context info: %s", error->message); |
| g_clear_error (&error); |
| g_object_unref (priv->other_context); |
| priv->other_context = NULL; |
| } else { |
| gst_gl_context_activate (priv->other_context, FALSE); |
| } |
| } |
| } |
| |
| GtkWidget * |
| gtk_gst_gl_widget_new (void) |
| { |
| return (GtkWidget *) g_object_new (GTK_TYPE_GST_GL_WIDGET, NULL); |
| } |
| |
| gboolean |
| gtk_gst_gl_widget_init_winsys (GtkGstGLWidget * gst_widget) |
| { |
| GtkGstGLWidgetPrivate *priv = gst_widget->priv; |
| GError *error = NULL; |
| |
| g_return_val_if_fail (GTK_IS_GST_GL_WIDGET (gst_widget), FALSE); |
| |
| GTK_GST_BASE_WIDGET_LOCK (gst_widget); |
| |
| if (priv->display && priv->gdk_context && priv->other_context) { |
| GTK_GST_BASE_WIDGET_UNLOCK (gst_widget); |
| return TRUE; |
| } |
| |
| if (!priv->other_context) { |
| GTK_GST_BASE_WIDGET_UNLOCK (gst_widget); |
| gst_gtk_invoke_on_main ((GThreadFunc) _get_gl_context, gst_widget); |
| GTK_GST_BASE_WIDGET_LOCK (gst_widget); |
| } |
| |
| if (!GST_IS_GL_CONTEXT (priv->other_context)) { |
| GTK_GST_BASE_WIDGET_UNLOCK (gst_widget); |
| return FALSE; |
| } |
| |
| if (!gst_gl_display_create_context (priv->display, priv->other_context, |
| &priv->context, &error)) { |
| g_clear_error (&error); |
| GTK_GST_BASE_WIDGET_UNLOCK (gst_widget); |
| return FALSE; |
| } |
| |
| GTK_GST_BASE_WIDGET_UNLOCK (gst_widget); |
| return TRUE; |
| } |
| |
| GstGLContext * |
| gtk_gst_gl_widget_get_gtk_context (GtkGstGLWidget * gst_widget) |
| { |
| if (!gst_widget->priv->other_context) |
| return NULL; |
| |
| return gst_object_ref (gst_widget->priv->other_context); |
| } |
| |
| GstGLContext * |
| gtk_gst_gl_widget_get_context (GtkGstGLWidget * gst_widget) |
| { |
| if (!gst_widget->priv->context) |
| return NULL; |
| |
| return gst_object_ref (gst_widget->priv->context); |
| } |
| |
| GstGLDisplay * |
| gtk_gst_gl_widget_get_display (GtkGstGLWidget * gst_widget) |
| { |
| if (!gst_widget->priv->display) |
| return NULL; |
| |
| return gst_object_ref (gst_widget->priv->display); |
| } |