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gdk/gl: Allow autodetection for GL/GLES

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If the GdkGLContext was not explicitly instructed to use or not GLES, we
can detect whether the underlying API is going to be desktop GL or GLES.

https://bugzilla.gnome.org/show_bug.cgi?id=773180
This commit is contained in:
Emmanuele Bassi
2016-10-19 13:43:17 +01:00
committed by Matthias Clasen
parent d40c6f180f
commit 803362bb5d
2 changed files with 22 additions and 6 deletions
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26
gdk/gdkglcontext.c
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@ -105,7 +105,8 @@ typedef struct {
guint debug_enabled : 1;
guint forward_compatible : 1;
guint is_legacy : 1;
guint use_es : 1;
int use_es;
GdkGLContextPaintData *paint_data;
} GdkGLContextPrivate;
@ -362,6 +363,9 @@ gdk_gl_context_class_init (GdkGLContextClass *klass)
static void
gdk_gl_context_init (GdkGLContext *self)
{
GdkGLContextPrivate *priv = gdk_gl_context_get_instance_private (self);
priv->use_es = -1;
}
/*< private >
@ -683,13 +687,18 @@ gdk_gl_context_set_is_legacy (GdkGLContext *context,
/**
* gdk_gl_context_set_use_es:
* @context: a #GdkGLContext:
* @use_es: whether the context should use OpenGL ES instead of OpenGL
* @use_es: whether the context should use OpenGL ES instead of OpenGL,
* or -1 to allow auto-detection
*
* Requests that GDK create a OpenGL ES context instead of an OpenGL one,
* if the platform and windowing system allows it.
*
* The @context must not have been realized.
*
* By default, GDK will attempt to automatically detect whether the
* underlying GL implementation is OpenGL or OpenGL ES once the @context
* is realized.
*
* You should check the return value of gdk_gl_context_get_use_es() after
* calling gdk_gl_context_realize() to decide whether to use the OpenGL or
* OpenGL ES API, extensions, or shaders.
@ -698,14 +707,15 @@ gdk_gl_context_set_is_legacy (GdkGLContext *context,
*/
void
gdk_gl_context_set_use_es (GdkGLContext *context,
gboolean use_es)
int use_es)
{
GdkGLContextPrivate *priv = gdk_gl_context_get_instance_private (context);
g_return_if_fail (GDK_IS_GL_CONTEXT (context));
g_return_if_fail (!priv->realized);
priv->use_es = !!use_es;
if (priv->use_es != use_es)
priv->use_es = use_es;
}
/**
@ -725,7 +735,10 @@ gdk_gl_context_get_use_es (GdkGLContext *context)
g_return_val_if_fail (GDK_IS_GL_CONTEXT (context), FALSE);
return priv->use_es;
if (!priv->realized)
return FALSE;
return priv->use_es > 0;
}
/**
@ -771,6 +784,9 @@ gdk_gl_context_check_extensions (GdkGLContext *context)
priv->gl_version = epoxy_gl_version ();
if (priv->use_es < 0)
priv->use_es = !epoxy_is_desktop_gl ();
if (priv->use_es)
{
has_npot = priv->gl_version >= 20;