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gdk: Create a global shared GL context

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Create a global GL context that connects all
GL contexts on a display and lets us share textures
between them.
This commit is contained in:
Matthias Clasen 2019-06-04 21:26:28 +00:00
parent 7293fd517e
commit 1f70bc4bf3
4 changed files with 52 additions and 5 deletions
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2
gdk/gdkinternals.h
View File

@ -274,6 +274,8 @@ void gdk_surface_move_resize (GdkSurface *surface,
gint width,
gint height);
GdkGLContext *gdk_surface_get_shared_data_gl_context (GdkSurface *surface);
G_END_DECLS
#endif /* __GDK_INTERNALS_H__ */

40
gdk/gdksurface.c
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@ -1110,6 +1110,46 @@ gdk_surface_get_state (GdkSurface *surface)
return surface->state;
}
GdkGLContext *
gdk_surface_get_shared_data_gl_context (GdkSurface *surface)
{
static int in_shared_data_creation;
GdkDisplay *display;
GdkGLContext *context;
if (in_shared_data_creation)
return NULL;
in_shared_data_creation = 1;
display = gdk_surface_get_display (surface);
context = (GdkGLContext *)g_object_get_data (G_OBJECT (display), "gdk-gl-shared-data-context");
if (context == NULL)
{
GError *error = NULL;
context = GDK_SURFACE_GET_CLASS (surface)->create_gl_context (surface, FALSE, NULL, &error);
if (context == NULL)
{
g_warning ("Failed to create shared context: %s", error->message);
g_clear_error (&error);
}
gdk_gl_context_realize (context, &error);
if (context == NULL)
{
g_warning ("Failed to realize shared context: %s", error->message);
g_clear_error (&error);
}
g_object_set_data (G_OBJECT (display), "gdk-gl-shared-data-context", context);
}
in_shared_data_creation = 0;
return context;
}
GdkGLContext *
gdk_surface_get_paint_gl_context (GdkSurface *surface,
GError **error)

7
gdk/wayland/gdkglcontext-wayland.c
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@ -47,6 +47,7 @@ gdk_wayland_gl_context_realize (GdkGLContext *context,
GdkWaylandGLContext *context_wayland = GDK_WAYLAND_GL_CONTEXT (context);
GdkDisplay *display = gdk_gl_context_get_display (context);
GdkGLContext *share = gdk_gl_context_get_shared_context (context);
GdkGLContext *shared_data_context = gdk_surface_get_shared_data_gl_context (gdk_gl_context_get_surface (context));
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (display);
EGLContext ctx;
EGLint context_attribs[N_EGL_ATTRS];
@ -114,7 +115,8 @@ gdk_wayland_gl_context_realize (GdkGLContext *context,
ctx = eglCreateContext (display_wayland->egl_display,
context_wayland->egl_config,
share != NULL ? GDK_WAYLAND_GL_CONTEXT (share)->egl_context
: EGL_NO_CONTEXT,
: shared_data_context != NULL ? GDK_WAYLAND_GL_CONTEXT (shared_data_context)->egl_context
: EGL_NO_CONTEXT,
context_attribs);
/* If context creation failed without the legacy bit, let's try again with it */
@ -136,7 +138,8 @@ gdk_wayland_gl_context_realize (GdkGLContext *context,
ctx = eglCreateContext (display_wayland->egl_display,
context_wayland->egl_config,
share != NULL ? GDK_WAYLAND_GL_CONTEXT (share)->egl_context
: EGL_NO_CONTEXT,
: shared_data_context != NULL ? GDK_WAYLAND_GL_CONTEXT (shared_data_context)->egl_context
: EGL_NO_CONTEXT,
context_attribs);
}

8
gdk/x11/gdkglcontext-x11.c
View File

@ -576,6 +576,7 @@ gdk_x11_gl_context_realize (GdkGLContext *context,
Display *dpy;
DrawableInfo *info;
GdkGLContext *share;
GdkGLContext *shared_data_context;
GdkSurface *surface;
gboolean debug_bit, compat_bit, legacy_bit, es_bit;
int major, minor, flags;
@ -586,6 +587,7 @@ gdk_x11_gl_context_realize (GdkGLContext *context,
context_x11 = GDK_X11_GL_CONTEXT (context);
display_x11 = GDK_X11_DISPLAY (display);
share = gdk_gl_context_get_shared_context (context);
shared_data_context = gdk_surface_get_shared_data_gl_context (surface);
gdk_gl_context_get_required_version (context, &major, &minor);
debug_bit = gdk_gl_context_get_debug_enabled (context);
@ -625,7 +627,7 @@ gdk_x11_gl_context_realize (GdkGLContext *context,
if (legacy_bit && !GDK_X11_DISPLAY (display)->has_glx_create_context)
{
GDK_DISPLAY_NOTE (display, OPENGL, g_message ("Creating legacy GL context on request"));
context_x11->glx_context = create_legacy_context (display, context_x11->glx_config, share);
context_x11->glx_context = create_legacy_context (display, context_x11->glx_config, share ? share : shared_data_context);
}
else
{
@ -650,14 +652,14 @@ gdk_x11_gl_context_realize (GdkGLContext *context,
GDK_DISPLAY_NOTE (display, OPENGL, g_message ("Creating GL3 context"));
context_x11->glx_context = create_gl3_context (display,
context_x11->glx_config,
share,
share ? share : shared_data_context,
profile, flags, major, minor);
/* Fall back to legacy in case the GL3 context creation failed */
if (context_x11->glx_context == NULL)
{
GDK_DISPLAY_NOTE (display, OPENGL, g_message ("Creating fallback legacy context"));
context_x11->glx_context = create_legacy_context (display, context_x11->glx_config, share);
context_x11->glx_context = create_legacy_context (display, context_x11->glx_config, share ? share : shared_data_context);
legacy_bit = TRUE;
es_bit = FALSE;
}