glmemory: Provide correct size on upload

Provide the right size to GL when uploading. Using maxsize is wrong
since we offset the data point with the memory offset and video
alignement offset.

https://bugzilla.gnome.org/show_bug.cgi?id=744246

diff --git a/gst-libs/gst/gl/gstglmemory.c b/gst-libs/gst/gl/gstglmemory.c
index 0afabcf0f72321c2bff761fd56d1ce6e2718d07f..0aca76a5030e6d6c1f88ce69b7199018a290b0cb 100644 (file)
--- a/gst-libs/gst/gl/gstglmemory.c
+++ b/gst-libs/gst/gl/gstglmemory.c
@@ -655,9 +655,12 @@ _download_memory (GstGLContext * context, GstGLMemory * gl_mem)
     gl->GetTexImage (gl_mem->tex_target, 0, format, type, gl_mem->data);
     gl->BindTexture (gl_mem->tex_target, 0);
   } else if (gl_mem->transfer_pbo && CONTEXT_SUPPORTS_PBO_DOWNLOAD (context)) {
-    gsize size = ((GstMemory *) gl_mem)->maxsize;
+    gsize size;
     gpointer map_data = NULL;
 
+    size = gst_gl_get_plane_data_size (&gl_mem->info, &gl_mem->valign,
+        gl_mem->plane);
+
     gl->BindBuffer (GL_PIXEL_PACK_BUFFER, gl_mem->transfer_pbo);
     map_data =
         gl->MapBufferRange (GL_PIXEL_PACK_BUFFER, 0, size, GL_MAP_READ_BIT);