1 files changed, 142 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c
new file mode 100644
index 0000000000..5d4d8eee02
--- /dev/null
+++ b/src/mesa/state_tracker/st_atom_constbuf.c
@@ -0,0 +1,142 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+/*
+ * Authors:
+ *   Keith Whitwell <keith@tungstengraphics.com>
+ *   Brian Paul
+ */
+
+#include "main/imports.h"
+#include "shader/prog_parameter.h"
+#include "shader/prog_print.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "st_atom_constbuf.h"
+#include "st_program.h"
+#include "st_inlines.h"
+
+
+/**
+ * Pass the given program parameters to the graphics pipe as a
+ * constant buffer.
+ * \param shader_type  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
+ */
+void st_upload_constants( struct st_context *st,
+                          struct gl_program_parameter_list *params,
+                          unsigned shader_type)
+{
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_constant_buffer *cbuf = &st->state.constants[shader_type];
+
+   assert(shader_type == PIPE_SHADER_VERTEX ||
+          shader_type == PIPE_SHADER_FRAGMENT);
+
+   /* update constants */
+   if (params && params->NumParameters) {
+      const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
+
+      _mesa_load_state_parameters(st->ctx, params);
+
+      /* We always need to get a new buffer, to keep the drivers simple and
+       * avoid gratuitous rendering synchronization.
+       */
+      pipe_buffer_reference(&cbuf->buffer, NULL );
+      cbuf->buffer = pipe_buffer_create(pipe->screen, 16,
+                                        PIPE_BUFFER_USAGE_CONSTANT,
+					paramBytes );
+
+      if (0) {
+	 debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n", 
+                      __FUNCTION__, shader_type, params->NumParameters,
+                      params->StateFlags);
+         _mesa_print_parameter_list(params);
+      }
+
+      /* load Mesa constants into the constant buffer */
+      if (cbuf->buffer)
+         st_no_flush_pipe_buffer_write(st, cbuf->buffer,
+				       0, paramBytes,
+				       params->ParameterValues);
+
+      st->pipe->set_constant_buffer(st->pipe, shader_type, 0, cbuf);
+   }
+   else {
+      st->constants.tracked_state[shader_type].dirty.mesa = 0x0;
+   }
+}
+
+
+/**
+ * Vertex shader:
+ */
+static void update_vs_constants(struct st_context *st )
+{
+   struct st_vertex_program *vp = st->vp;
+   struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
+
+   st_upload_constants( st, params, PIPE_SHADER_VERTEX );
+}
+
+
+const struct st_tracked_state st_update_vs_constants = {
+   "st_update_vs_constants",				/* name */
+   {							/* dirty */
+      (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
+      ST_NEW_VERTEX_PROGRAM,				/* st */
+   },
+   update_vs_constants					/* update */
+};
+
+
+
+/**
+ * Fragment shader:
+ */
+static void update_fs_constants(struct st_context *st )
+{
+   struct st_fragment_program *fp = st->fp;
+   struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
+
+   st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
+}
+
+
+const struct st_tracked_state st_update_fs_constants = {
+   "st_update_fs_constants",				/* name */
+   {							/* dirty */
+      (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
+      ST_NEW_FRAGMENT_PROGRAM,				/* st */
+   },
+   update_fs_constants					/* update */
+};
+