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| author | marha <marha@users.sourceforge.net> | 2010-12-29 12:20:21 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2010-12-29 12:20:21 +0000 |
| commit | 053f5dfd42ade05252e586a282e34906db10828d (patch) | |
| tree | de215580ce205409a6d810a005c6c5909f3145d1 /mesalib/src/mesa/state_tracker/st_atom_msaa.c | |
| parent | 04ceb8c4a0cca3d8682f094d1d6faed8f693afb5 (diff) | |
| parent | 807c6931fe683fd844ceec1b023232181e6aae03 (diff) | |
| download | vcxsrv-053f5dfd42ade05252e586a282e34906db10828d.tar.gz vcxsrv-053f5dfd42ade05252e586a282e34906db10828d.tar.bz2 vcxsrv-053f5dfd42ade05252e586a282e34906db10828d.zip | |
svn merge ^/branches/released .
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_atom_msaa.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_atom_msaa.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_atom_msaa.c b/mesalib/src/mesa/state_tracker/st_atom_msaa.c new file mode 100644 index 000000000..73f0ff160 --- /dev/null +++ b/mesalib/src/mesa/state_tracker/st_atom_msaa.c @@ -0,0 +1,83 @@ +/**************************************************************************
+ *
+ * Copyright 2010 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, 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 THE AUTHORS 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.
+ *
+ **************************************************************************/
+
+
+#include "st_context.h"
+#include "pipe/p_context.h"
+#include "st_atom.h"
+
+#include "cso_cache/cso_context.h"
+
+
+/* Second state atom for user clip planes:
+ */
+static void update_sample_mask( struct st_context *st )
+{
+ unsigned sample_mask = 0xffffffff;
+ unsigned sample_count = 1;
+ struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
+
+ /* dependency here on bound surface (or rather, sample count) is worrying */
+ if (framebuffer->zsbuf)
+ sample_count = framebuffer->zsbuf->texture->nr_samples;
+ else if (framebuffer->cbufs[0])
+ sample_count = framebuffer->cbufs[0]->texture->nr_samples;
+
+ if (st->ctx->Multisample.Enabled && sample_count > 1) {
+ /* unlike in gallium/d3d10 the mask is only active if msaa is enabled */
+ if (st->ctx->Multisample.SampleCoverage) {
+ unsigned nr_bits;
+ nr_bits = st->ctx->Multisample.SampleCoverageValue * (float)sample_count;
+ /* there's lot of ways how to do this. We just use first few bits,
+ since we have no knowledge of sample positions here. When
+ app-supplied mask though is used too might need to be smarter.
+ Also, there's a interface restriction here in theory it is
+ encouraged this mask not be the same at each pixel. */
+ sample_mask = (1 << nr_bits) - 1;
+ if (st->ctx->Multisample.SampleCoverageInvert)
+ sample_mask = ~sample_mask;
+ }
+ /* TODO merge with app-supplied sample mask */
+ }
+
+ /* mask off unused bits or don't care? */
+
+ if (sample_mask != st->state.sample_mask) {
+ st->state.sample_mask = sample_mask;
+ cso_set_sample_mask(st->cso_context, sample_mask);
+ }
+}
+
+
+const struct st_tracked_state st_update_msaa = {
+ "st_update_msaa", /* name */
+ { /* dirty */
+ (_NEW_MULTISAMPLE | _NEW_BUFFERS), /* mesa */
+ ST_NEW_FRAMEBUFFER, /* st */
+ },
+ update_sample_mask /* update */
+};
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