Initial import.

1 files changed, 216 insertions, 0 deletions

diff --git a/src/mesa/tnl/t_pipeline.c b/src/mesa/tnl/t_pipeline.c
new file mode 100644
index 0000000..e90e21b
--- /dev/null
+++ b/src/mesa/tnl/t_pipeline.c
@@ -0,0 +1,216 @@
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  Brian Paul   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, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL 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.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#include "glheader.h"
+#include "context.h"
+#include "imports.h"
+#include "state.h"
+#include "mtypes.h"
+
+#include "math/m_translate.h"
+#include "math/m_xform.h"
+
+#include "t_context.h"
+#include "t_pipeline.h"
+
+
+void _tnl_install_pipeline( GLcontext *ctx,
+			    const struct tnl_pipeline_stage **stages )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct tnl_pipeline *pipe = &tnl->pipeline;
+   GLuint i;
+
+   ASSERT(pipe->nr_stages == 0);
+
+   pipe->run_state_changes = ~0;
+   pipe->run_input_changes = ~0;
+   pipe->build_state_changes = ~0;
+   pipe->build_state_trigger = 0;
+   pipe->inputs = 0;
+
+   /* Create a writeable copy of each stage.
+    */
+   for (i = 0 ; i < MAX_PIPELINE_STAGES && stages[i] ; i++) {
+      MEMCPY( &pipe->stages[i], stages[i], sizeof( **stages ));
+      pipe->build_state_trigger |= pipe->stages[i].check_state;
+   }
+
+   MEMSET( &pipe->stages[i], 0, sizeof( **stages ));
+
+   pipe->nr_stages = i;
+}
+
+void _tnl_destroy_pipeline( GLcontext *ctx )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   GLuint i;
+
+   for (i = 0 ; i < tnl->pipeline.nr_stages ; i++)
+      tnl->pipeline.stages[i].destroy( &tnl->pipeline.stages[i] );
+
+   tnl->pipeline.nr_stages = 0;
+}
+
+/* TODO: merge validate with run.
+ */
+void _tnl_validate_pipeline( GLcontext *ctx )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct tnl_pipeline *pipe = &tnl->pipeline;
+   struct tnl_pipeline_stage *s = pipe->stages;
+   GLuint newstate = pipe->build_state_changes;
+   GLuint generated = 0;
+   GLuint changed_inputs = 0;
+
+   pipe->inputs = 0;
+   pipe->build_state_changes = 0;
+
+   for ( ; s->check ; s++) {
+
+      s->changed_inputs |= s->inputs & changed_inputs;
+
+      if (s->check_state & newstate) {
+	 if (s->active) {
+	    GLuint old_outputs = s->outputs;
+	    s->check(ctx, s);
+	    if (!s->active)
+	       changed_inputs |= old_outputs;
+	 }
+	 else
+	    s->check(ctx, s);
+      }
+
+      if (s->active) {
+	 pipe->inputs |= s->inputs & ~generated;
+	 generated |= s->outputs;
+      }
+   }
+}
+
+
+
+void _tnl_run_pipeline( GLcontext *ctx )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct tnl_pipeline *pipe = &tnl->pipeline;
+   struct tnl_pipeline_stage *s = pipe->stages;
+   GLuint changed_state = pipe->run_state_changes;
+   GLuint changed_inputs = pipe->run_input_changes;
+   GLboolean running = GL_TRUE;
+#ifdef HAVE_FAST_MATH
+   unsigned short __tmp;
+#endif
+
+   if (!tnl->vb.Count)
+      return;
+
+   pipe->run_state_changes = 0;
+   pipe->run_input_changes = 0;
+
+   /* Done elsewhere.
+    */
+   ASSERT(pipe->build_state_changes == 0);
+
+#ifdef HAVE_FAST_MATH
+   START_FAST_MATH(__tmp);
+#endif
+
+   /* If something changes in the pipeline, tag all subsequent stages
+    * using this value for recalculation.  Inactive stages have their
+    * state and inputs examined to try to keep cached data alive over
+    * state-changes.
+    */
+   for ( ; s->run ; s++) {
+      s->changed_inputs |= s->inputs & changed_inputs;
+
+      if (s->run_state & changed_state)
+	 s->changed_inputs = s->inputs;
+
+      if (s->active && running) {
+	 if (s->changed_inputs)
+	    changed_inputs |= s->outputs;
+
+	 running = s->run( ctx, s );
+
+	 s->changed_inputs = 0;
+      }
+   }
+
+#ifdef HAVE_FAST_MATH
+   END_FAST_MATH(__tmp);
+#endif
+}
+
+
+
+/* The default pipeline.  This is useful for software rasterizers, and
+ * simple hardware rasterizers.  For customization, I don't recommend
+ * tampering with the internals of these stages in the way that
+ * drivers did in Mesa 3.4.  These stages are basically black boxes,
+ * and should be left intact.
+ *
+ * To customize the pipeline, consider:
+ *
+ * - removing redundant stages (making sure that the software rasterizer
+ *   can cope with this on fallback paths).  An example is fog
+ *   coordinate generation, which is not required in the FX driver.
+ *
+ * - replacing general-purpose machine-independent stages with
+ *   general-purpose machine-specific stages.  There is no example of
+ *   this to date, though it must be borne in mind that all subsequent
+ *   stages that reference the output of the new stage must cope with
+ *   any machine-specific data introduced.  This may not be easy
+ *   unless there are no such stages (ie the new stage is the last in
+ *   the pipe).
+ *
+ * - inserting optimized (but specialized) stages ahead of the
+ *   general-purpose fallback implementation.  For example, the old
+ *   fastpath mechanism, which only works when the VB->Elts input is
+ *   available, can be duplicated by placing the fastpath stage at the
+ *   head of this pipeline.  Such specialized stages are currently
+ *   constrained to have no outputs (ie. they must either finish the *
+ *   pipeline by returning GL_FALSE from run(), or do nothing).
+ *
+ * Some work can be done to lift some of the restrictions in the final
+ * case, if it becomes necessary to do so.
+ */
+const struct tnl_pipeline_stage *_tnl_default_pipeline[] = {
+   &_tnl_vertex_transform_stage,
+   &_tnl_normal_transform_stage,
+   &_tnl_lighting_stage,
+   &_tnl_fog_coordinate_stage,
+   &_tnl_texgen_stage,
+   &_tnl_texture_transform_stage,
+   &_tnl_point_attenuation_stage,
+#if defined(FEATURE_NV_vertex_program) || defined(FEATURE_ARB_vertex_program)
+   &_tnl_vertex_program_stage,
+#endif
+   &_tnl_render_stage,
+   0
+};