[PATCH v3 6/6] st/mesa: ask pipe driver to recreate derived internal resources when (re-)binding external textures

[Philipp Zabel]

Use the resource_changed callback to invalidate internal resources
derived from external textures when they are (re-)bound. This is needed
to comply with the requirement from the GL_OES_EGL_image_external
extension that a call to glBindTexture guarantees that all further
sampling will return values that correspond to the values in the
external texture at or after the time that glBindTexture was called.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 src/mesa/state_tracker/st_atom_texture.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/state_tracker/st_atom_texture.c b/src/mesa/state_tracker/st_atom_texture.c
index a1b1b88..32d0201 100644
--- a/src/mesa/state_tracker/st_atom_texture.c
+++ b/src/mesa/state_tracker/st_atom_texture.c
@@ -91,6 +91,10 @@ update_single_texture(struct st_context *st,
       stObj->prev_sRGBDecode = samp->sRGBDecode;
    }
 
+   if (texObj->TargetIndex == TEXTURE_EXTERNAL_INDEX &&
+       stObj->pt->screen->resource_changed)
+         stObj->pt->screen->resource_changed(stObj->pt->screen, stObj->pt);
+
    *sampler_view =
       st_get_texture_sampler_view_from_stobj(st, stObj, samp, glsl_version);
    return GL_TRUE;
-- 
2.10.2