util/r300g: split the r300 index buffer modifier functions out to util

These can be used by other drivers, like r600g.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_index_modify.c b/src/gallium/auxiliary/util/u_index_modify.c
new file mode 100644
index 0000000000..65b079ed53
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_index_modify.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2010 Marek Olšák <maraeo@gmail.com>
+ *
+ * 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
+ * on 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 AUTHOR(S) AND/OR THEIR 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 "pipe/p_context.h"
+#include "util/u_index_modify.h"
+#include "util/u_inlines.h"
+
+void util_shorten_ubyte_elts(struct pipe_context *context,
+			     struct pipe_resource **elts,
+			     int index_bias,
+			     unsigned start,
+			     unsigned count)
+{
+    struct pipe_screen* screen = context->screen;
+    struct pipe_resource* new_elts;
+    unsigned char *in_map;
+    unsigned short *out_map;
+    struct pipe_transfer *src_transfer, *dst_transfer;
+    unsigned i;
+
+    new_elts = pipe_buffer_create(screen,
+                                  PIPE_BIND_INDEX_BUFFER,
+                                  2 * count);
+
+    in_map = pipe_buffer_map(context, *elts, PIPE_TRANSFER_READ, &src_transfer);
+    out_map = pipe_buffer_map(context, new_elts, PIPE_TRANSFER_WRITE, &dst_transfer);
+
+    in_map += start;
+
+    for (i = 0; i < count; i++) {
+        *out_map = (unsigned short)(*in_map + index_bias);
+        in_map++;
+        out_map++;
+    }
+
+    pipe_buffer_unmap(context, *elts, src_transfer);
+    pipe_buffer_unmap(context, new_elts, dst_transfer);
+
+    *elts = new_elts;
+}
+
+void util_rebuild_ushort_elts(struct pipe_context *context,
+			      struct pipe_resource **elts,
+			      int index_bias,
+			      unsigned start, unsigned count)
+{
+    struct pipe_transfer *in_transfer = NULL;
+    struct pipe_transfer *out_transfer = NULL;
+    struct pipe_resource *new_elts;
+    unsigned short *in_map;
+    unsigned short *out_map;
+    unsigned i;
+
+    new_elts = pipe_buffer_create(context->screen,
+                                  PIPE_BIND_INDEX_BUFFER,
+                                  2 * count);
+
+    in_map = pipe_buffer_map(context, *elts,
+                             PIPE_TRANSFER_READ, &in_transfer);
+    out_map = pipe_buffer_map(context, new_elts,
+                              PIPE_TRANSFER_WRITE, &out_transfer);
+
+    in_map += start;
+    for (i = 0; i < count; i++) {
+        *out_map = (unsigned short)(*in_map + index_bias);
+        in_map++;
+        out_map++;
+    }
+
+    pipe_buffer_unmap(context, *elts, in_transfer);
+    pipe_buffer_unmap(context, new_elts, out_transfer);
+
+    *elts = new_elts;
+}
+
+void util_rebuild_uint_elts(struct pipe_context *context,
+			    struct pipe_resource **elts,
+			    int index_bias,
+			    unsigned start, unsigned count)
+{
+    struct pipe_transfer *in_transfer = NULL;
+    struct pipe_transfer *out_transfer = NULL;
+    struct pipe_resource *new_elts;
+    unsigned int *in_map;
+    unsigned int *out_map;
+    unsigned i;
+
+    new_elts = pipe_buffer_create(context->screen,
+                                  PIPE_BIND_INDEX_BUFFER,
+                                  2 * count);
+
+    in_map = pipe_buffer_map(context, *elts,
+                             PIPE_TRANSFER_READ, &in_transfer);
+    out_map = pipe_buffer_map(context, new_elts,
+                              PIPE_TRANSFER_WRITE, &out_transfer);
+
+    in_map += start;
+    for (i = 0; i < count; i++) {
+        *out_map = (unsigned int)(*in_map + index_bias);
+        in_map++;
+        out_map++;
+    }
+
+    pipe_buffer_unmap(context, *elts, in_transfer);
+    pipe_buffer_unmap(context, new_elts, out_transfer);
+
+    *elts = new_elts;
+}