st/mesa: make KHR_debug output independent of context creation flags (v2)

Instead, keep track of GL_DEBUG_OUTPUT and (un)install the pipe_debug_callback
accordingly. Hardware drivers can still use the absence of the callback to
skip more expensive operations in the normal case, and users can no longer be
surprised by the need to set the debug flag at context creation time.

v2:
- re-add the proper initialization of debug contexts (Ilia Mirkin)
- silence a potential warning (Ilia Mirkin)

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

1 files changed, 72 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_debug.c b/src/mesa/state_tracker/st_debug.c
index 6d859c6ab5b..134366db09d 100644
--- a/src/mesa/state_tracker/st_debug.c
+++ b/src/mesa/state_tracker/st_debug.c
@@ -104,3 +104,75 @@ st_print_current(void)
 }
 
 
+/**
+ * Installed as pipe_debug_callback when GL_DEBUG_OUTPUT is enabled.
+ */
+static void
+st_debug_message(void *data,
+                 unsigned *id,
+                 enum pipe_debug_type ptype,
+                 const char *fmt,
+                 va_list args)
+{
+   struct st_context *st = data;
+   enum mesa_debug_source source;
+   enum mesa_debug_type type;
+   enum mesa_debug_severity severity;
+
+   switch (ptype) {
+   case PIPE_DEBUG_TYPE_OUT_OF_MEMORY:
+      source = MESA_DEBUG_SOURCE_API;
+      type = MESA_DEBUG_TYPE_ERROR;
+      severity = MESA_DEBUG_SEVERITY_MEDIUM;
+      break;
+   case PIPE_DEBUG_TYPE_ERROR:
+      source = MESA_DEBUG_SOURCE_API;
+      type = MESA_DEBUG_TYPE_ERROR;
+      severity = MESA_DEBUG_SEVERITY_MEDIUM;
+      break;
+   case PIPE_DEBUG_TYPE_SHADER_INFO:
+      source = MESA_DEBUG_SOURCE_SHADER_COMPILER;
+      type = MESA_DEBUG_TYPE_OTHER;
+      severity = MESA_DEBUG_SEVERITY_NOTIFICATION;
+      break;
+   case PIPE_DEBUG_TYPE_PERF_INFO:
+      source = MESA_DEBUG_SOURCE_API;
+      type = MESA_DEBUG_TYPE_PERFORMANCE;
+      severity = MESA_DEBUG_SEVERITY_NOTIFICATION;
+      break;
+   case PIPE_DEBUG_TYPE_INFO:
+      source = MESA_DEBUG_SOURCE_API;
+      type = MESA_DEBUG_TYPE_OTHER;
+      severity = MESA_DEBUG_SEVERITY_NOTIFICATION;
+      break;
+   case PIPE_DEBUG_TYPE_FALLBACK:
+      source = MESA_DEBUG_SOURCE_API;
+      type = MESA_DEBUG_TYPE_PERFORMANCE;
+      severity = MESA_DEBUG_SEVERITY_NOTIFICATION;
+      break;
+   case PIPE_DEBUG_TYPE_CONFORMANCE:
+      source = MESA_DEBUG_SOURCE_API;
+      type = MESA_DEBUG_TYPE_OTHER;
+      severity = MESA_DEBUG_SEVERITY_NOTIFICATION;
+      break;
+   default:
+      unreachable("invalid debug type");
+   }
+   _mesa_gl_vdebug(st->ctx, id, source, type, severity, fmt, args);
+}
+
+void
+st_enable_debug_output(struct st_context *st, boolean enable)
+{
+   struct pipe_context *pipe = st->pipe;
+
+   if (!pipe->set_debug_callback)
+      return;
+
+   if (enable) {
+      struct pipe_debug_callback cb = { st_debug_message, st };
+      pipe->set_debug_callback(pipe, &cb);
+   } else {
+      pipe->set_debug_callback(pipe, NULL);
+   }
+}