1 files changed, 63 insertions, 0 deletions
diff --git a/src/gallium/drivers/swr/swr_scratch.h b/src/gallium/drivers/swr/swr_scratch.h
new file mode 100644
index 00000000000..74218d63644
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+++ b/src/gallium/drivers/swr/swr_scratch.h
@@ -0,0 +1,63 @@
+/****************************************************************************
+ * Copyright (C) 2015 Intel Corporation.   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 (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 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.
+ ***************************************************************************/
+
+#ifndef SWR_SCRATCH_H
+#define SWR_SCRATCH_H
+
+struct swr_scratch_space {
+   void *head;
+   unsigned int current_size;
+   /* TODO XXX: Add a fence for wrap condition. */
+
+   void *base;
+};
+
+struct swr_scratch_buffers {
+   struct swr_scratch_space vs_constants;
+   struct swr_scratch_space fs_constants;
+   struct swr_scratch_space vertex_buffer;
+   struct swr_scratch_space index_buffer;
+};
+
+
+/*
+ * swr_copy_to_scratch_space
+ * Copies size bytes of user_buffer into the scratch ring buffer.
+ * Used to store temporary data such as client arrays and constants.
+ *
+ * Inputs:
+ *   space ptr to scratch pool (vs_constants, fs_constants)
+ *   user_buffer, data to copy into scratch space
+ *   size to be copied
+ * Returns:
+ *   pointer to data copied to scratch space.
+ */
+void *swr_copy_to_scratch_space(struct swr_context *ctx,
+                                struct swr_scratch_space *space,
+                                const void *user_buffer,
+                                unsigned int size);
+
+void swr_init_scratch_buffers(struct swr_context *ctx);
+void swr_destroy_scratch_buffers(struct swr_context *ctx);
+
+#endif