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| author | marha <marha@users.sourceforge.net> | 2011-04-30 15:25:48 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-04-30 15:25:48 +0000 |
| commit | 0402d388cb9803652c0f9a52ba7dcb6029fdd0b9 (patch) | |
| tree | afd1b68edb9a74d5c87e63ea72d04b8301705d82 /mesalib/src/gallium/auxiliary/util/u_sampler.c | |
| parent | c4ae0bb951bfb6061e7f0c492ba03de330137515 (diff) | |
| download | vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.tar.gz vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.tar.bz2 vcxsrv-0402d388cb9803652c0f9a52ba7dcb6029fdd0b9.zip | |
Added extra needed files
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_sampler.c')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_sampler.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_sampler.c b/mesalib/src/gallium/auxiliary/util/u_sampler.c new file mode 100644 index 000000000..3dcf4fcd0 --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_sampler.c @@ -0,0 +1,103 @@ +/**************************************************************************
+ *
+ * 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 VMWARE 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 "u_format.h"
+#include "u_sampler.h"
+
+
+static void
+default_template(struct pipe_sampler_view *view,
+ const struct pipe_resource *texture,
+ enum pipe_format format,
+ unsigned expand_green_blue)
+{
+ /* XXX: Check if format is compatible with texture->format.
+ */
+
+ view->format = format;
+ view->u.tex.first_level = 0;
+ view->u.tex.last_level = texture->last_level;
+ view->u.tex.first_layer = 0;
+ view->u.tex.last_layer = texture->target == PIPE_TEXTURE_3D ?
+ texture->depth0 - 1 : texture->array_size - 1;
+ view->swizzle_r = PIPE_SWIZZLE_RED;
+ view->swizzle_g = PIPE_SWIZZLE_GREEN;
+ view->swizzle_b = PIPE_SWIZZLE_BLUE;
+ view->swizzle_a = PIPE_SWIZZLE_ALPHA;
+
+ /* Override default green and blue component expansion to the requested
+ * one.
+ *
+ * Gallium expands nonexistent components to (0,0,0,1), DX9 expands
+ * to (1,1,1,1). Since alpha is always expanded to 1, and red is
+ * always present, we only really care about green and blue
+ * components.
+ *
+ * To make it look less hackish, one would have to add
+ * UTIL_FORMAT_SWIZZLE_EXPAND to indicate components for expansion
+ * and then override without exceptions or favoring one component
+ * over another.
+ */
+ if (format != PIPE_FORMAT_A8_UNORM) {
+ const struct util_format_description *desc = util_format_description(format);
+
+ assert(desc);
+ if (desc) {
+ if (desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_0) {
+ view->swizzle_g = expand_green_blue;
+ }
+ if (desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_0) {
+ view->swizzle_b = expand_green_blue;
+ }
+ }
+ }
+}
+
+void
+u_sampler_view_default_template(struct pipe_sampler_view *view,
+ const struct pipe_resource *texture,
+ enum pipe_format format)
+{
+ /* Expand to (0, 0, 0, 1) */
+ default_template(view,
+ texture,
+ format,
+ PIPE_SWIZZLE_ZERO);
+}
+
+void
+u_sampler_view_default_dx9_template(struct pipe_sampler_view *view,
+ const struct pipe_resource *texture,
+ enum pipe_format format)
+{
+ /* Expand to (1, 1, 1, 1) */
+ default_template(view,
+ texture,
+ format,
+ PIPE_SWIZZLE_ONE);
+}
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