st/mesa: Advertise GL_EXT_shader_framebuffer_fetch_non_coherent

This extension requires the ability to read from all render targets,
so we only enable it if PIPE_CAP_FBFETCH >= PIPE_CAP_MAX_RENDER_TARGETS.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 98a3490..f442c08 100644 (file)
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -1398,6 +1398,11 @@ void st_init_extensions(struct pipe_screen *screen,
 
    if (max_fb_fetch_rts > 0) {
       extensions->KHR_blend_equation_advanced = true;
+
+      if (max_fb_fetch_rts >=
+          screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS)) {
+         extensions->EXT_shader_framebuffer_fetch_non_coherent = true;
+      }
    }
 
    consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);