1 files changed, 142 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_screen_buffers.c b/src/gallium/drivers/i965/brw_screen_buffers.c
new file mode 100644
index 0000000000..0bf885ce8c
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_screen_buffers.c
@@ -0,0 +1,142 @@
+
+#include "util/u_memory.h"
+#include "util/u_math.h"
+
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+
+#include "brw_screen.h"
+#include "brw_winsys.h"
+
+
+
+static void *
+brw_buffer_map( struct pipe_screen *screen,
+                struct pipe_buffer *buffer,
+                unsigned usage )
+{
+   struct brw_screen *bscreen = brw_screen(screen); 
+   struct brw_winsys_screen *sws = bscreen->sws;
+   struct brw_buffer *buf = brw_buffer( buffer );
+
+   if (buf->user_buffer)
+      return buf->user_buffer;
+
+   return sws->bo_map( buf->bo, 
+                       (usage & PIPE_BUFFER_USAGE_CPU_WRITE) ? TRUE : FALSE );
+}
+
+static void 
+brw_buffer_unmap( struct pipe_screen *screen,
+                   struct pipe_buffer *buffer )
+{
+   struct brw_screen *bscreen = brw_screen(screen); 
+   struct brw_winsys_screen *sws = bscreen->sws;
+   struct brw_buffer *buf = brw_buffer( buffer );
+   
+   if (buf->bo)
+      sws->bo_unmap(buf->bo);
+}
+
+static void
+brw_buffer_destroy( struct pipe_buffer *buffer )
+{
+   struct brw_screen *bscreen = brw_screen( buffer->screen );
+   struct brw_winsys_screen *sws = bscreen->sws;
+   struct brw_buffer *buf = brw_buffer( buffer );
+
+   assert(!p_atomic_read(&buffer->reference.count));
+
+   if (buf->bo)
+      sws->bo_unreference(buf->bo);
+   
+   FREE(buf);
+}
+
+
+static struct pipe_buffer *
+brw_buffer_create(struct pipe_screen *screen,
+                   unsigned alignment,
+                   unsigned usage,
+                   unsigned size)
+{
+   struct brw_screen *bscreen = brw_screen(screen);
+   struct brw_winsys_screen *sws = bscreen->sws;
+   struct brw_buffer *buf;
+   unsigned usage_type;
+   
+   buf = CALLOC_STRUCT(brw_buffer);
+   if (!buf)
+      return NULL;
+      
+   pipe_reference_init(&buf->base.reference, 1);
+   buf->base.screen = screen;
+   buf->base.alignment = alignment;
+   buf->base.usage = usage;
+   buf->base.size = size;
+
+   switch (usage & (PIPE_BUFFER_USAGE_VERTEX |
+                    PIPE_BUFFER_USAGE_INDEX |
+                    PIPE_BUFFER_USAGE_PIXEL |
+                    PIPE_BUFFER_USAGE_CONSTANT))
+   {
+   case PIPE_BUFFER_USAGE_VERTEX:
+   case PIPE_BUFFER_USAGE_INDEX:
+   case (PIPE_BUFFER_USAGE_VERTEX|PIPE_BUFFER_USAGE_INDEX):
+      usage_type = BRW_BUFFER_TYPE_VERTEX;
+      break;
+      
+   case PIPE_BUFFER_USAGE_PIXEL:
+      usage_type = BRW_BUFFER_TYPE_PIXEL;
+      break;
+
+   case PIPE_BUFFER_USAGE_CONSTANT:
+      usage_type = BRW_BUFFER_TYPE_SHADER_CONSTANTS;
+      break;
+
+   default:
+      usage_type = BRW_BUFFER_TYPE_GENERIC;
+      break;
+   }
+   
+   buf->bo = sws->bo_alloc( sws,
+                            usage_type,
+                            size,
+                            alignment );
+      
+   return &buf->base; 
+}
+
+
+static struct pipe_buffer *
+brw_user_buffer_create(struct pipe_screen *screen,
+                       void *ptr,
+                       unsigned bytes)
+{
+   struct brw_buffer *buf;
+   
+   buf = CALLOC_STRUCT(brw_buffer);
+   if (!buf)
+      return NULL;
+      
+   buf->user_buffer = ptr;
+   
+   pipe_reference_init(&buf->base.reference, 1);
+   buf->base.screen = screen;
+   buf->base.alignment = 1;
+   buf->base.usage = 0;
+   buf->base.size = bytes;
+   
+   return &buf->base; 
+}
+
+   
+void brw_screen_buffer_init(struct brw_screen *brw_screen)
+{
+   brw_screen->base.buffer_create = brw_buffer_create;
+   brw_screen->base.user_buffer_create = brw_user_buffer_create;
+   brw_screen->base.buffer_map = brw_buffer_map;
+   brw_screen->base.buffer_unmap = brw_buffer_unmap;
+   brw_screen->base.buffer_destroy = brw_buffer_destroy;
+}