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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_stipple.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_stipple.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_atom_stipple.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_atom_stipple.c b/mesalib/src/mesa/state_tracker/st_atom_stipple.c new file mode 100644 index 000000000..5efea315c --- /dev/null +++ b/mesalib/src/mesa/state_tracker/st_atom_stipple.c @@ -0,0 +1,93 @@ +/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+ /*
+ * \brief polygon stipple state
+ *
+ * Authors:
+ * Brian Paul
+ */
+
+
+#include <assert.h>
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+
+
+/**
+ * OpenGL's polygon stipple is indexed with window coordinates in which
+ * the origin (0,0) is the lower-left corner of the window.
+ * With Gallium, the origin is the upper-left corner of the window.
+ * To convert GL's polygon stipple to what gallium expects we need to
+ * invert the pattern vertically and rotate the stipple rows according
+ * to the window height.
+ */
+static void
+invert_stipple(GLuint dest[32], const GLuint src[32], GLuint winHeight)
+{
+ GLuint i;
+
+ for (i = 0; i < 32; i++) {
+ dest[i] = src[(winHeight - 1 - i) & 0x1f];
+ }
+}
+
+
+
+static void
+update_stipple( struct st_context *st )
+{
+ const GLuint sz = sizeof(st->state.poly_stipple);
+ assert(sz == sizeof(st->ctx->PolygonStipple));
+
+ if (memcmp(st->state.poly_stipple, st->ctx->PolygonStipple, sz)) {
+ /* state has changed */
+ struct pipe_poly_stipple newStipple;
+
+ memcpy(st->state.poly_stipple, st->ctx->PolygonStipple, sz);
+
+ invert_stipple(newStipple.stipple, st->ctx->PolygonStipple,
+ st->ctx->DrawBuffer->Height);
+
+ st->pipe->set_polygon_stipple(st->pipe, &newStipple);
+ }
+}
+
+
+/** Update the stipple when the pattern or window height changes */
+const struct st_tracked_state st_update_polygon_stipple = {
+ "st_update_polygon_stipple", /* name */
+ { /* dirty */
+ (_NEW_POLYGONSTIPPLE |
+ _NEW_BUFFERS), /* mesa */
+ 0, /* st */
+ },
+ update_stipple /* update */
+};
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