Set default values for the constants required in
ARB_framebuffer_no_attachments and obtained the number
of layers from ``PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS``.
We also obtain the MaxFramebufferSamples value using
a query back to the driver for PIPE_FORMAT_NONE.
Signed-off-by: Edward O'Callaghan <eocallag...@alterapraxis.com>
---
src/mesa/state_tracker/st_extensions.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/src/mesa/state_tracker/st_extensions.c
b/src/mesa/state_tracker/st_extensions.c
index 59777ee..658dfec 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -1050,6 +1050,33 @@ void st_init_extensions(struct pipe_screen *screen,
extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
}
+ /* ARB_framebuffer_no_attachments */
+ consts->MaxFramebufferWidth = consts->MaxViewportWidth;
+ consts->MaxFramebufferHeight = consts->MaxViewportHeight;
+ enum pipe_format void_formats[] = {
+ PIPE_FORMAT_NONE
+ };
+ /* Assumes maximum number of samples of 32 */
+ consts->MaxFramebufferSamples =
+ get_max_samples_for_formats(screen, ARRAY_SIZE(void_formats),
+ void_formats, 32,
+ PIPE_BIND_RENDER_TARGET);
+
+ /* N.B., we cheat here a little by assuming that
+ * PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS has the same
+ * number of layers as we need, although we technically
+ * could have more the generality is not really useful
+ * in practicality.
+ */
+ consts->MaxFramebufferLayers
+ = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
+
+ if ((consts->MaxSamples >= 4 && consts->MaxFramebufferLayers >= 2048)
+ || (consts->MaxFramebufferSamples >= consts->MaxSamples &&
+ consts->MaxFramebufferLayers >= consts->MaxArrayTextureLayers))
+ if (screen->get_param(screen, PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT))
+ extensions->ARB_framebuffer_no_attachments = GL_TRUE;
+
/* GL_ARB_ES3_compatibility.
*
* Assume that ES3 is supported if GLSL 3.30 is supported.
--
2.5.5
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