From 4f84a3aa32b06c99e65a4bf91452671075f8204c Mon Sep 17 00:00:00 2001
From: José Fonseca <jfonseca@vmware.com>
Date: Tue, 16 Nov 2010 18:56:39 +0000
Subject: libgl-gdi: Allow to pick softpipe/llvmpipe on runtime.

---
 src/gallium/targets/libgl-gdi/libgl_gdi.c | 167 ++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 src/gallium/targets/libgl-gdi/libgl_gdi.c

(limited to 'src/gallium/targets/libgl-gdi/libgl_gdi.c')

diff --git a/src/gallium/targets/libgl-gdi/libgl_gdi.c b/src/gallium/targets/libgl-gdi/libgl_gdi.c
new file mode 100644
index 0000000000..1d6e664eab
--- /dev/null
+++ b/src/gallium/targets/libgl-gdi/libgl_gdi.c
@@ -0,0 +1,167 @@
+/**************************************************************************
+ *
+ * Copyright 2009-2010 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, 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 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
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Softpipe/LLVMpipe support.
+ *
+ * @author Jose Fonseca <jfonseca@vmware.com>
+ */
+
+
+#include <windows.h>
+
+#include "util/u_debug.h"
+#include "stw_winsys.h"
+#include "gdi/gdi_sw_winsys.h"
+
+#include "softpipe/sp_texture.h"
+#include "softpipe/sp_screen.h"
+#include "softpipe/sp_public.h"
+
+#ifdef HAVE_LLVMPIPE
+#include "llvmpipe/lp_texture.h"
+#include "llvmpipe/lp_screen.h"
+#include "llvmpipe/lp_public.h"
+#endif
+
+
+static boolean use_llvmpipe = FALSE;
+
+
+static struct pipe_screen *
+gdi_screen_create(void)
+{
+   const char *default_driver;
+   const char *driver;
+   struct pipe_screen *screen = NULL;
+   struct sw_winsys *winsys;
+
+   winsys = gdi_create_sw_winsys();
+   if(!winsys)
+      goto no_winsys;
+
+#ifdef HAVE_LLVMPIPE
+   default_driver = "llvmpipe";
+#else
+   default_driver = "softpipe";
+#endif
+
+   driver = debug_get_option("GALLIUM_DRIVER", default_driver);
+
+#ifdef HAVE_LLVMPIPE
+   if (strcmp(driver, "llvmpipe") == 0) {
+      screen = llvmpipe_create_screen( winsys );
+   }
+#endif
+
+   if (screen == NULL) {
+      screen = softpipe_create_screen( winsys );
+   } else {
+      use_llvmpipe = TRUE;
+   }
+
+   if(!screen)
+      goto no_screen;
+
+   return screen;
+   
+no_screen:
+   winsys->destroy(winsys);
+no_winsys:
+   return NULL;
+}
+
+
+static void
+gdi_present(struct pipe_screen *screen,
+            struct pipe_surface *surface,
+            HDC hDC)
+{
+   /* This will fail if any interposing layer (trace, debug, etc) has
+    * been introduced between the state-trackers and the pipe driver.
+    *
+    * Ideally this would get replaced with a call to
+    * pipe_screen::flush_frontbuffer().
+    *
+    * Failing that, it may be necessary for intervening layers to wrap
+    * other structs such as this stw_winsys as well...
+    */
+
+   struct sw_winsys *winsys = NULL;
+   struct sw_displaytarget *dt = NULL;
+
+#ifdef HAVE_LLVMPIPE
+   if (use_llvmpipe) {
+      winsys = llvmpipe_screen(screen)->winsys;
+      dt = llvmpipe_resource(surface->texture)->dt;
+      gdi_sw_display(winsys, dt, hDC);
+      return;
+   }
+#endif
+
+   winsys = softpipe_screen(screen)->winsys,
+   dt = softpipe_resource(surface->texture)->dt,
+   gdi_sw_display(winsys, dt, hDC);
+}
+
+
+static const struct stw_winsys stw_winsys = {
+   &gdi_screen_create,
+   &gdi_present,
+   NULL, /* get_adapter_luid */
+   NULL, /* shared_surface_open */
+   NULL, /* shared_surface_close */
+   NULL  /* compose */
+};
+
+
+BOOL WINAPI
+DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
+{
+   switch (fdwReason) {
+   case DLL_PROCESS_ATTACH:
+      stw_init(&stw_winsys);
+      stw_init_thread();
+      break;
+
+   case DLL_THREAD_ATTACH:
+      stw_init_thread();
+      break;
+
+   case DLL_THREAD_DETACH:
+      stw_cleanup_thread();
+      break;
+
+   case DLL_PROCESS_DETACH:
+      stw_cleanup_thread();
+      stw_cleanup();
+      break;
+   }
+   return TRUE;
+}
-- 
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