From: Matthias Clasen <mclasen@redhat.com>
Date: Fri, 20 Oct 2023 00:56:59 +0000 (-0400)
Subject: glcontext: Add api to check for vertex arrays
X-Git-Tag: archive/raspbian/4.12.4+ds-3+rpi1^2~21^2^2~27^2~1
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=f725e3f992b060ad767fd0bcf9543bab53daa471;p=gtk4.git

glcontext: Add api to check for vertex arrays

Vertex arrays are available in GL and in GLES >= 3.

We don't check for the GLES extension that provided
vertex arrays in older GLES, since that requires
using different API.

This api avoids version checks all over the place.
---

diff --git a/gdk/gdkglcontext.c b/gdk/gdkglcontext.c
index 3368310f9d..1a1cb324ea 100644
--- a/gdk/gdkglcontext.c
+++ b/gdk/gdkglcontext.c
@@ -1817,6 +1817,7 @@ gdk_gl_context_has_sync (GdkGLContext *self)
   return priv->has_sync;
 }
 
+/* Return if GL_BGRA works with glTexImage2D */
 gboolean
 gdk_gl_context_has_bgra (GdkGLContext *self)
 {
@@ -1825,6 +1826,27 @@ gdk_gl_context_has_bgra (GdkGLContext *self)
   return priv->has_bgra;
 }
 
+/* Return if glGenVertexArrays, glBindVertexArray and glDeleteVertexArrays
+ * can be used
+ */
+gboolean
+gdk_gl_context_has_vertex_arrays (GdkGLContext *self)
+{
+  GdkGLContextPrivate *priv = gdk_gl_context_get_instance_private (self);
+
+  switch (priv->api)
+    {
+    case GDK_GL_API_GL:
+      return TRUE;
+
+    case GDK_GL_API_GLES:
+      return gdk_gl_version_get_major (&priv->gl_version) >= 3;
+
+    default:
+      g_return_val_if_reached (FALSE);
+    }
+}
+
 /* This is currently private! */
 /* When using GL/ES, don't flip the 'R' and 'B' bits on Windows/ANGLE for glReadPixels() */
 gboolean
diff --git a/gdk/gdkglcontextprivate.h b/gdk/gdkglcontextprivate.h
index f026eaf081..c047370ca6 100644
--- a/gdk/gdkglcontextprivate.h
+++ b/gdk/gdkglcontextprivate.h
@@ -157,6 +157,8 @@ gboolean                gdk_gl_context_has_sync                 (GdkGLContext
 
 gboolean                gdk_gl_context_has_bgra                 (GdkGLContext    *self) G_GNUC_PURE;
 
+gboolean                gdk_gl_context_has_vertex_arrays        (GdkGLContext    *self) G_GNUC_PURE;
+
 double                  gdk_gl_context_get_scale                (GdkGLContext    *self);
 
 G_END_DECLS