1 files changed, 99 insertions, 0 deletions
diff --git a/src/sna/sna_stream.c b/src/sna/sna_stream.c
new file mode 100644
index 00000000..d6d817d3
--- /dev/null
+++ b/src/sna/sna_stream.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#include "sna.h"
+#include "sna_render.h"
+
+#if DEBUG_STREAM
+#undef DBG
+#define DBG(x) ErrorF x
+#endif
+
+int sna_static_stream_init(struct sna_static_stream *stream)
+{
+	stream->used = 0;
+	stream->size = 64*1024;
+
+	stream->data = malloc(stream->size);
+	return stream->data != NULL;
+}
+
+static uint32_t sna_static_stream_alloc(struct sna_static_stream *stream,
+					uint32_t len, uint32_t align)
+{
+	uint32_t offset = ALIGN(stream->used, align);
+	uint32_t size = offset + len;
+
+	if (size > stream->size) {
+		do
+			stream->size *= 2;
+		while (stream->size < size);
+
+		stream->data = realloc(stream->data, stream->size);
+	}
+
+	stream->used = size;
+	return offset;
+}
+
+uint32_t sna_static_stream_add(struct sna_static_stream *stream,
+			       const void *data, uint32_t len, uint32_t align)
+{
+	uint32_t offset = sna_static_stream_alloc(stream, len, align);
+	memcpy(stream->data + offset, data, len);
+	return offset;
+}
+
+void *sna_static_stream_map(struct sna_static_stream *stream,
+			    uint32_t len, uint32_t align)
+{
+	uint32_t offset = sna_static_stream_alloc(stream, len, align);
+	return memset(stream->data + offset, 0, len);
+}
+
+uint32_t sna_static_stream_offsetof(struct sna_static_stream *stream, void *ptr)
+{
+	return (uint8_t *)ptr - stream->data;
+}
+
+struct kgem_bo *sna_static_stream_fini(struct sna *sna,
+				       struct sna_static_stream *stream)
+{
+	struct kgem_bo *bo;
+
+	DBG(("uploaded %d bytes of static state\n", stream->used));
+
+	bo = kgem_create_linear(&sna->kgem, stream->used);
+	if (bo && !kgem_bo_write(&sna->kgem, bo, stream->data, stream->used)) {
+		kgem_bo_destroy(&sna->kgem, bo);
+		return NULL;
+	}
+
+	free(stream->data);
+
+	return bo;
+}