Begin/EndQuery functions

1 files changed, 76 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_cb_queryobj.c b/src/mesa/state_tracker/st_cb_queryobj.c
new file mode 100644
index 0000000000..3a8fbde8ab
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_queryobj.c
@@ -0,0 +1,76 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+
+/**
+ * glBegin/EndQuery interface to pipe
+ *
+ * \author Brian Paul
+ */
+
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/image.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "st_context.h"
+#include "st_cb_queryobj.h"
+#include "st_public.h"
+
+
+/**
+ * Do glReadPixels by getting rows from the framebuffer surface with
+ * get_tile().  Convert to requested format/type with Mesa image routines.
+ * Image transfer ops are done in software too.
+ */
+static void
+st_BeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
+{
+   struct pipe_context *pipe = ctx->st->pipe;
+   if (target == GL_SAMPLES_PASSED_ARB) {
+      pipe->reset_occlusion_counter(pipe);
+   }
+}
+
+
+static void
+st_EndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
+{
+   struct pipe_context *pipe = ctx->st->pipe;
+   if (target == GL_SAMPLES_PASSED_ARB) {
+      q->Result = pipe->get_occlusion_counter(pipe);
+   }
+}
+
+
+void st_init_query_functions(struct dd_function_table *functions)
+{
+   functions->BeginQuery = st_BeginQuery;
+   functions->EndQuery = st_EndQuery;
+}