1 files changed, 183 insertions, 0 deletions
diff --git a/src/gallium/drivers/trace/tr_stream_wd.c b/src/gallium/drivers/trace/tr_stream_wd.c
new file mode 100644
index 0000000000..704eb15bd7
--- /dev/null
+++ b/src/gallium/drivers/trace/tr_stream_wd.c
@@ -0,0 +1,183 @@
+/**************************************************************************
+ *
+ * Copyright 2008 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Stream implementation for the Windows Display driver.
+ */
+
+#include "pipe/p_config.h"
+
+#if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
+
+#include <windows.h>
+#include <winddi.h>
+
+#include "util/u_memory.h"
+#include "util/u_string.h"
+
+#include "tr_stream.h"
+
+
+#define MAP_FILE_SIZE (4*1024*1024)
+
+
+struct trace_stream 
+{
+   char filename[MAX_PATH + 1];
+   WCHAR wFileName[MAX_PATH + 1];
+   ULONG_PTR iFile;
+   char *pMap;
+   size_t written;
+   unsigned suffix;
+};
+
+
+static INLINE boolean
+trace_stream_map(struct trace_stream *stream)
+{
+   ULONG BytesInUnicodeString;
+   static char filename[MAX_PATH + 1];
+   unsigned filename_len;
+
+   filename_len = util_snprintf(filename,
+                                sizeof(filename),
+                                "\\??\\%s.%04x",
+                                stream->filename,
+                                stream->suffix++);
+
+   EngMultiByteToUnicodeN(
+         stream->wFileName,
+         sizeof(stream->wFileName),
+         &BytesInUnicodeString,
+         filename,
+         filename_len);
+   
+   stream->pMap = EngMapFile(stream->wFileName, MAP_FILE_SIZE, &stream->iFile);
+   if(!stream->pMap)
+      return FALSE;
+   
+   memset(stream->pMap, 0, MAP_FILE_SIZE);
+   stream->written = 0;
+   
+   return TRUE;
+}
+
+
+static INLINE void
+trace_stream_unmap(struct trace_stream *stream)
+{
+   EngUnmapFile(stream->iFile);
+   if(stream->written < MAP_FILE_SIZE) {
+      /* Truncate file size */
+      stream->pMap = EngMapFile(stream->wFileName, stream->written, &stream->iFile);
+      if(stream->pMap)
+         EngUnmapFile(stream->iFile);
+   }
+   
+   stream->pMap = NULL;
+}
+
+
+struct trace_stream *
+trace_stream_create(const char *filename)
+{
+   struct trace_stream *stream;
+   
+   stream = CALLOC_STRUCT(trace_stream);
+   if(!stream)
+      goto error1;
+   
+   strncpy(stream->filename, filename, sizeof(stream->filename));
+   
+   if(!trace_stream_map(stream))
+      goto error2;
+   
+   return stream;
+   
+error2:
+   FREE(stream);
+error1:
+   return NULL;
+}
+
+
+static INLINE void
+trace_stream_copy(struct trace_stream *stream, const char *data, size_t size)
+{
+   assert(stream->written + size <= MAP_FILE_SIZE);
+   memcpy(stream->pMap + stream->written, data, size);
+   stream->written += size;
+}
+
+
+boolean
+trace_stream_write(struct trace_stream *stream, const void *data, size_t size)
+{
+   if(!stream)
+      return FALSE;
+   
+   if(!stream->pMap)
+      return FALSE;
+   
+   while(stream->written + size > MAP_FILE_SIZE) {
+      size_t step = MAP_FILE_SIZE - stream->written;
+      trace_stream_copy(stream, data, step);
+      data = (const char *)data + step;
+      size -= step;
+      
+      trace_stream_unmap(stream);
+      if(!trace_stream_map(stream))
+         return FALSE;
+   }
+
+   trace_stream_copy(stream, data, size);
+   
+   return TRUE;
+}
+
+
+void
+trace_stream_flush(struct trace_stream *stream) 
+{
+   (void)stream;
+}
+
+
+void
+trace_stream_close(struct trace_stream *stream) 
+{
+   if(!stream)
+      return;
+   
+   trace_stream_unmap(stream);
+
+   FREE(stream);
+}
+
+
+#endif