gl: reset gl->DrawBuffer to the necessary values

GL_COLOR_ATTACHMENT0 when a framebuffer is bound
GL_BACK if no framebuffer is bound

https://bugzilla.gnome.org/show_bug.cgi?id=784210

diff --git a/gst-libs/gst/gl/gstglcolorconvert.c b/gst-libs/gst/gl/gstglcolorconvert.c
index 40da43e..3a1ef18 100644 (file)
--- a/gst-libs/gst/gl/gstglcolorconvert.c
+++ b/gst-libs/gst/gl/gstglcolorconvert.c
@@ -2505,7 +2505,7 @@ _do_convert_draw (GstGLContext * context, GstGLColorConvert * convert)
   _unbind_buffer (convert);
 
   if (gl->DrawBuffer)
-    gl->DrawBuffer (GL_NONE);
+    gl->DrawBuffer (GL_COLOR_ATTACHMENT0);
 
   /* we are done with the shader */
   gst_gl_context_clear_shader (context);

diff --git a/gst-libs/gst/gl/gstglframebuffer.c b/gst-libs/gst/gl/gstglframebuffer.c
index 678bcb7..93837b8 100644 (file)
--- a/gst-libs/gst/gl/gstglframebuffer.c
+++ b/gst-libs/gst/gl/gstglframebuffer.c
@@ -296,7 +296,7 @@ gst_gl_framebuffer_draw_to_texture (GstGLFramebuffer * fb, GstGLMemory * mem,
 
   if (gst_gl_context_get_gl_api (fb->context) & (GST_GL_API_OPENGL |
           GST_GL_API_OPENGL3))
-    gl->DrawBuffer (GL_NONE);
+    gl->DrawBuffer (GL_COLOR_ATTACHMENT0);
   gl->Viewport (viewport_dim[0], viewport_dim[1], viewport_dim[2],
       viewport_dim[3]);
   gst_gl_context_clear_framebuffer (fb->context);

diff --git a/gst-libs/gst/gl/gstglviewconvert.c b/gst-libs/gst/gl/gstglviewconvert.c
index 6ba48b6..53475a7 100644 (file)
--- a/gst-libs/gst/gl/gstglviewconvert.c
+++ b/gst-libs/gst/gl/gstglviewconvert.c
@@ -1951,7 +1951,7 @@ _do_view_convert_draw (GstGLContext * context, GstGLViewConvert * viewconvert)
     gl->BindVertexArray (0);
   _unbind_buffer (viewconvert);
   if (gl->DrawBuffer)
-    gl->DrawBuffer (GL_NONE);
+    gl->DrawBuffer (GL_COLOR_ATTACHMENT0);
   /* we are done with the shader */
   gst_gl_context_clear_shader (context);
   gl->Viewport (viewport_dim[0], viewport_dim[1], viewport_dim[2],