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-rw-r--r--src/gallium/drivers/svga/svga_state.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_state.c b/src/gallium/drivers/svga/svga_state.c
new file mode 100644
index 0000000000..1c21d3acfe
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_state.c
@@ -0,0 +1,278 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc. 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 THE AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ **********************************************************/
+
+#include "util/u_debug.h"
+#include "pipe/p_defines.h"
+#include "util/u_memory.h"
+#include "draw/draw_context.h"
+
+#include "svga_context.h"
+#include "svga_screen.h"
+#include "svga_state.h"
+#include "svga_draw.h"
+#include "svga_cmd.h"
+#include "svga_hw_reg.h"
+
+/* This is just enough to decide whether we need to use the draw
+ * module (swtnl) or not.
+ */
+static const struct svga_tracked_state *need_swtnl_state[] =
+{
+ &svga_update_need_swvfetch,
+ &svga_update_need_pipeline,
+ &svga_update_need_swtnl,
+ NULL
+};
+
+
+/* Atoms to update hardware state prior to emitting a clear or draw
+ * packet.
+ */
+static const struct svga_tracked_state *hw_clear_state[] =
+{
+ &svga_hw_scissor,
+ &svga_hw_viewport,
+ &svga_hw_framebuffer,
+ NULL
+};
+
+
+/* Atoms to update hardware state prior to emitting a draw packet.
+ */
+static const struct svga_tracked_state *hw_draw_state[] =
+{
+ &svga_hw_update_zero_stride,
+ &svga_hw_fs,
+ &svga_hw_vs,
+ &svga_hw_rss,
+ &svga_hw_tss,
+ &svga_hw_tss_binding,
+ &svga_hw_clip_planes,
+ &svga_hw_vdecl,
+ &svga_hw_fs_parameters,
+ &svga_hw_vs_parameters,
+ NULL
+};
+
+
+static const struct svga_tracked_state *swtnl_draw_state[] =
+{
+ &svga_update_swtnl_draw,
+ &svga_update_swtnl_vdecl,
+ NULL
+};
+
+/* Flattens the graph of state dependencies. Could swap the positions
+ * of hw_clear_state and need_swtnl_state without breaking anything.
+ */
+static const struct svga_tracked_state **state_levels[] =
+{
+ need_swtnl_state,
+ hw_clear_state,
+ hw_draw_state,
+ swtnl_draw_state
+};
+
+
+
+static unsigned check_state( unsigned a,
+ unsigned b )
+{
+ return (a & b);
+}
+
+static void accumulate_state( unsigned *a,
+ unsigned b )
+{
+ *a |= b;
+}
+
+
+static void xor_states( unsigned *result,
+ unsigned a,
+ unsigned b )
+{
+ *result = a ^ b;
+}
+
+
+
+static int update_state( struct svga_context *svga,
+ const struct svga_tracked_state *atoms[],
+ unsigned *state )
+{
+ boolean debug = TRUE;
+ enum pipe_error ret = 0;
+ unsigned i;
+
+ ret = svga_hwtnl_flush( svga->hwtnl );
+ if (ret != 0)
+ return ret;
+
+ if (debug) {
+ /* Debug version which enforces various sanity checks on the
+ * state flags which are generated and checked to help ensure
+ * state atoms are ordered correctly in the list.
+ */
+ unsigned examined, prev;
+
+ examined = 0;
+ prev = *state;
+
+ for (i = 0; atoms[i] != NULL; i++) {
+ unsigned generated;
+
+ assert(atoms[i]->dirty);
+ assert(atoms[i]->update);
+
+ if (check_state(*state, atoms[i]->dirty)) {
+ if (0)
+ debug_printf("update: %s\n", atoms[i]->name);
+ ret = atoms[i]->update( svga, *state );
+ if (ret != 0)
+ return ret;
+ }
+
+ /* generated = (prev ^ state)
+ * if (examined & generated)
+ * fail;
+ */
+ xor_states(&generated, prev, *state);
+ if (check_state(examined, generated)) {
+ debug_printf("state atom %s generated state already examined\n",
+ atoms[i]->name);
+ assert(0);
+ }
+
+ prev = *state;
+ accumulate_state(&examined, atoms[i]->dirty);
+ }
+ }
+ else {
+ for (i = 0; atoms[i] != NULL; i++) {
+ if (check_state(*state, atoms[i]->dirty)) {
+ ret = atoms[i]->update( svga, *state );
+ if (ret != 0)
+ return ret;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+
+int svga_update_state( struct svga_context *svga,
+ unsigned max_level )
+{
+ struct svga_screen *screen = svga_screen(svga->pipe.screen);
+ int ret = 0;
+ int i;
+
+ /* Check for updates to bound textures. This can't be done in an
+ * atom as there is no flag which could provoke this test, and we
+ * cannot create one.
+ */
+ if (svga->state.texture_timestamp != screen->texture_timestamp) {
+ svga->state.texture_timestamp = screen->texture_timestamp;
+ svga->dirty |= SVGA_NEW_TEXTURE;
+ }
+
+ for (i = 0; i <= max_level; i++) {
+ svga->dirty |= svga->state.dirty[i];
+
+ if (svga->dirty) {
+ ret = update_state( svga,
+ state_levels[i],
+ &svga->dirty );
+ if (ret != 0)
+ return ret;
+
+ svga->state.dirty[i] = 0;
+ }
+ }
+
+ for (; i < SVGA_STATE_MAX; i++)
+ svga->state.dirty[i] |= svga->dirty;
+
+ svga->dirty = 0;
+ return 0;
+}
+
+
+
+
+void svga_update_state_retry( struct svga_context *svga,
+ unsigned max_level )
+{
+ int ret;
+
+ ret = svga_update_state( svga, max_level );
+
+ if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
+ svga_context_flush(svga, NULL);
+ ret = svga_update_state( svga, max_level );
+ }
+
+ assert( ret == 0 );
+}
+
+
+
+#define EMIT_RS(_rs, _count, _name, _value) \
+do { \
+ _rs[_count].state = _name; \
+ _rs[_count].uintValue = _value; \
+ _count++; \
+} while (0)
+
+
+/* Setup any hardware state which will be constant through the life of
+ * a context.
+ */
+enum pipe_error svga_emit_initial_state( struct svga_context *svga )
+{
+ SVGA3dRenderState *rs;
+ unsigned count = 0;
+ const unsigned COUNT = 2;
+ enum pipe_error ret;
+
+ ret = SVGA3D_BeginSetRenderState( svga->swc, &rs, COUNT );
+ if (ret)
+ return ret;
+
+ /* Always use D3D style coordinate space as this is the only one
+ * which is implemented on all backends.
+ */
+ EMIT_RS(rs, count, SVGA3D_RS_COORDINATETYPE, SVGA3D_COORDINATE_LEFTHANDED );
+ EMIT_RS(rs, count, SVGA3D_RS_FRONTWINDING, SVGA3D_FRONTWINDING_CW );
+
+ assert( COUNT == count );
+ SVGA_FIFOCommitAll( svga->swc );
+
+ return 0;
+
+}
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