1 files changed, 119 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_pipe_clear.c b/src/gallium/drivers/svga/svga_pipe_clear.c
new file mode 100644
index 00000000000..8977d26541c
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_pipe_clear.c
@@ -0,0 +1,119 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc.  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 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.
+ *
+ **********************************************************/
+
+#include "svga_cmd.h"
+
+#include "pipe/p_defines.h"
+#include "util/u_pack_color.h"
+
+#include "svga_context.h"
+#include "svga_state.h"
+
+
+static enum pipe_error
+try_clear(struct svga_context *svga, 
+          unsigned buffers,
+          const float *rgba,
+          double depth,
+          unsigned stencil)
+{
+   int ret = PIPE_OK;
+   SVGA3dRect rect = { 0, 0, 0, 0 };
+   boolean restore_viewport = FALSE;
+   SVGA3dClearFlag flags = 0;
+   struct pipe_framebuffer_state *fb = &svga->curr.framebuffer;
+   unsigned color = 0;
+
+   ret = svga_update_state(svga, SVGA_STATE_HW_CLEAR);
+   if (ret)
+      return ret;
+
+   if ((buffers & PIPE_CLEAR_COLOR) && fb->cbufs[0]) {
+      flags |= SVGA3D_CLEAR_COLOR;
+      util_pack_color(rgba, PIPE_FORMAT_A8R8G8B8_UNORM, &color);
+
+      rect.w = fb->cbufs[0]->width;
+      rect.h = fb->cbufs[0]->height;
+   }
+
+   if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && fb->zsbuf) {
+      flags |= SVGA3D_CLEAR_DEPTH;
+
+      if (svga->curr.framebuffer.zsbuf->format == PIPE_FORMAT_Z24S8_UNORM)
+         flags |= SVGA3D_CLEAR_STENCIL;
+
+      rect.w = MAX2(rect.w, fb->zsbuf->width);
+      rect.h = MAX2(rect.h, fb->zsbuf->height);
+   }
+
+   if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) {
+      restore_viewport = TRUE;
+      ret = SVGA3D_SetViewport(svga->swc, &rect);
+      if (ret)
+         return ret;
+   }
+
+   ret = SVGA3D_ClearRect(svga->swc, flags, color, depth, stencil,
+                          rect.x, rect.y, rect.w, rect.h);
+   if (ret != PIPE_OK)
+      return ret;
+
+   if (restore_viewport) {
+      memcpy(&rect, &svga->state.hw_clear.viewport, sizeof rect);
+      ret = SVGA3D_SetViewport(svga->swc, &rect);
+   }
+   
+   return ret;
+}
+
+/**
+ * Clear the given surface to the specified value.
+ * No masking, no scissor (clear entire buffer).
+ */
+void
+svga_clear(struct pipe_context *pipe, unsigned buffers, const float *rgba,
+	   double depth, unsigned stencil)
+{
+   struct svga_context *svga = svga_context( pipe );
+   int ret;
+
+   ret = try_clear( svga, buffers, rgba, depth, stencil );
+
+   if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
+      /* Flush command buffer and retry:
+       */
+      svga_context_flush( svga, NULL );
+
+      ret = try_clear( svga, buffers, rgba, depth, stencil );
+   }
+
+   /*
+    * Mark target surfaces as dirty
+    * TODO Mark only cleared surfaces.
+    */
+   svga_mark_surfaces_dirty(svga);
+
+   assert (ret == PIPE_OK);
+}