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Add GDK_GL env var and GdkGLFlags

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This moves the GDK_ALWAYS_USE_GL env var to GDK_GL=always.
It also changes GDK_DEBUG=nogl to GDK_GL=disable, as GDK_DEBUG
is really only about debug loggin.

It also adds some completely new flags:

 software-draw-gl:
   Always use software fallback for drawing gl content to a cairo_t.
   This disables the fastpaths that exist for drawing directly to
   a window and instead reads back the pixels into a cairo image
   surface.

 software-draw-surface:
   Always use software fallback for drawing cairo surfaces onto a
   gl-using window.  This disables e.g. texture-from-pixmap on X11.

 software-draw:
   Enables both the above.
This commit is contained in:
Alexander Larsson 2014-11-06 10:21:48 +01:00
parent 7fde5213b0
commit 90a5fa80af
5 changed files with 34 additions and 13 deletions
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16
gdk/gdk.c
View File

@ -134,6 +134,14 @@ static GMutex gdk_threads_mutex;
static GCallback gdk_threads_lock = NULL;
static GCallback gdk_threads_unlock = NULL;
static const GDebugKey gdk_gl_keys[] = {
{"disable", GDK_GL_FLAGS_DISABLE},
{"always", GDK_GL_FLAGS_ALWAYS},
{"software-draw", GDK_GL_FLAGS_SOFTWARE_DRAW_GL | GDK_GL_FLAGS_SOFTWARE_DRAW_SURFACE},
{"software-draw-gl", GDK_GL_FLAGS_SOFTWARE_DRAW_GL},
{"software-draw-surface", GDK_GL_FLAGS_SOFTWARE_DRAW_SURFACE},
};
#ifdef G_ENABLE_DEBUG
static const GDebugKey gdk_debug_keys[] = {
{"events", GDK_DEBUG_EVENTS},
@ -149,7 +157,6 @@ static const GDebugKey gdk_debug_keys[] = {
{"eventloop", GDK_DEBUG_EVENTLOOP},
{"frames", GDK_DEBUG_FRAMES},
{"settings", GDK_DEBUG_SETTINGS},
{"nogl", GDK_DEBUG_NOGL},
{"opengl", GDK_DEBUG_OPENGL},
};
@ -248,6 +255,7 @@ void
gdk_pre_parse_libgtk_only (void)
{
const char *rendering_mode;
const gchar *gl_string;
gdk_initialized = TRUE;
@ -268,6 +276,12 @@ gdk_pre_parse_libgtk_only (void)
}
#endif /* G_ENABLE_DEBUG */
gl_string = getenv("GDK_GL");
if (gl_string != NULL)
_gdk_gl_flags = g_parse_debug_string (gl_string,
(GDebugKey *) gdk_gl_keys,
G_N_ELEMENTS (gdk_gl_keys));
if (getenv ("GDK_NATIVE_WINDOWS"))
{
g_warning ("The GDK_NATIVE_WINDOWS environment variable is not supported in GTK3.\n"

9
gdk/gdkgl.c
View File

@ -335,7 +335,8 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
/* For direct paint of non-alpha renderbuffer, we can
just do a bitblit */
if (source_type == GL_RENDERBUFFER &&
if ((_gdk_gl_flags & GDK_GL_FLAGS_SOFTWARE_DRAW_GL) == 0 &&
source_type == GL_RENDERBUFFER &&
alpha_size == 0 &&
direct_window != NULL &&
direct_window->current_paint.use_gl &&
@ -415,7 +416,8 @@ gdk_cairo_draw_from_gl (cairo_t *cr,
}
/* For direct paint of alpha or non-alpha textures we can use texturing */
else if (source_type == GL_TEXTURE &&
else if ((_gdk_gl_flags & GDK_GL_FLAGS_SOFTWARE_DRAW_GL) == 0 &&
source_type == GL_TEXTURE &&
direct_window != NULL &&
direct_window->current_paint.use_gl &&
trivial_transform &&
@ -602,7 +604,8 @@ gdk_gl_texture_from_surface (cairo_surface_t *surface,
guint target;
paint_context = gdk_gl_context_get_current ();
if (paint_context &&
if ((_gdk_gl_flags & GDK_GL_FLAGS_SOFTWARE_DRAW_SURFACE) == 0 &&
paint_context &&
GDK_GL_CONTEXT_GET_CLASS (paint_context)->texture_from_surface &&
GDK_GL_CONTEXT_GET_CLASS (paint_context)->texture_from_surface (paint_context, surface, region))
return;

1
gdk/gdkglobals.c
View File

@ -34,4 +34,5 @@ GList *_gdk_default_filters = NULL;
gchar *_gdk_display_name = NULL;
gchar *_gdk_display_arg_name = NULL;
gboolean _gdk_disable_multidevice = FALSE;
guint _gdk_gl_flags = 0;
GdkRenderingMode _gdk_rendering_mode = GDK_RENDERING_MODE_SIMILAR;

12
gdk/gdkinternals.h
View File

@ -85,10 +85,17 @@ typedef enum {
GDK_DEBUG_EVENTLOOP = 1 << 10,
GDK_DEBUG_FRAMES = 1 << 11,
GDK_DEBUG_SETTINGS = 1 << 12,
GDK_DEBUG_NOGL = 1 << 13,
GDK_DEBUG_OPENGL = 1 << 14
GDK_DEBUG_OPENGL = 1 << 13,
} GdkDebugFlag;
typedef enum {
GDK_GL_FLAGS_DISABLE = 1 << 0,
GDK_GL_FLAGS_ALWAYS = 1 << 1,
GDK_GL_FLAGS_SOFTWARE_DRAW_GL = 1 << 2,
GDK_GL_FLAGS_SOFTWARE_DRAW_SURFACE = 1 << 3,
} GdkGLFlags;
typedef enum {
GDK_RENDERING_MODE_SIMILAR = 0,
GDK_RENDERING_MODE_IMAGE,
@ -99,6 +106,7 @@ extern GList *_gdk_default_filters;
extern GdkWindow *_gdk_parent_root;
extern guint _gdk_debug_flags;
extern guint _gdk_gl_flags;
extern GdkRenderingMode _gdk_rendering_mode;
#ifdef G_ENABLE_DEBUG

9
gdk/gdkwindow.c
View File

@ -287,16 +287,11 @@ create_surface_accumulator (GSignalInvocationHint *ihint,
static GQuark quark_pointer_window = 0;
static gboolean always_use_gl = FALSE;
static void
gdk_window_class_init (GdkWindowClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
if (g_getenv ("GDK_ALWAYS_USE_GL"))
always_use_gl = TRUE;
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_window_finalize;
@ -1424,7 +1419,7 @@ gdk_window_new (GdkWindow *parent,
G_CALLBACK (device_removed_cb), window);
if (always_use_gl)
if ((_gdk_gl_flags & (GDK_GL_FLAGS_ALWAYS | GDK_GL_FLAGS_DISABLE)) == GDK_GL_FLAGS_ALWAYS)
{
GError *error = NULL;
@ -2730,7 +2725,7 @@ gdk_window_ref_impl_surface (GdkWindow *window)
GdkGLContext *
gdk_window_get_paint_gl_context (GdkWindow *window, GError **error)
{
if (_gdk_debug_flags & GDK_DEBUG_NOGL)
if (_gdk_gl_flags & GDK_GL_FLAGS_DISABLE)
{
g_set_error_literal (error, GDK_GL_ERROR,
GDK_GL_ERROR_NOT_AVAILABLE,