targets/dri-swrast: convert to gallium megadrivers :)

Export the approapriate new symbol, and keep backwards compat
via the megadriver_stub helper library.

Our next step would be to unify dri/drm and dri/sw, leading to
a complete megadrivers solution, and having a single library
that provides dri across all targets.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Tested-by: Rob Clark <robclark@freedesktop.org>
Tested-by: Thomas Helland <thomashelland90 at gmail.com>
Acked-by: Tom Stellard <thomas.stellard@amd.com>

src/gallium/Automake.inc

@@ -28,6 +28,8 @@ GALLIUM_DRIVER_CXXFLAGS = \
 
 GALLIUM_DRI_CFLAGS = \
 	-I$(top_srcdir)/include \
+	-I$(top_srcdir)/src/gallium/state_trackers/dri/common \
+	-I$(top_srcdir)/src/mesa/drivers/dri/common \
 	-I$(top_srcdir)/src/gallium/include \
 	-I$(top_srcdir)/src/gallium/auxiliary \
 	-I$(top_srcdir)/src/gallium/drivers \

src/gallium/state_trackers/dri/common/dri_screen.h

@@ -147,6 +147,8 @@ dri_destroy_screen(__DRIscreen * sPriv);
 
 extern const struct __DriverAPIRec galliumdrm_driver_api;
 extern const __DRIextension *galliumdrm_driver_extensions[];
+extern const struct __DriverAPIRec galliumsw_driver_api;
+extern const __DRIextension *galliumsw_driver_extensions[];
 extern const __DRIconfigOptionsExtension gallium_config_options;
 
 #endif

src/gallium/state_trackers/dri/sw/drisw.c

@@ -397,7 +397,7 @@ drisw_create_buffer(__DRIscreen * sPriv,
  *
  * DRI versions differ in their implementation of init_screen and swap_buffers.
  */
-const struct __DriverAPIRec driDriverAPI = {
+const struct __DriverAPIRec galliumsw_driver_api = {
    .InitScreen = drisw_init_screen,
    .DestroyScreen = dri_destroy_screen,
    .CreateContext = dri_create_context,
@@ -411,7 +411,7 @@ const struct __DriverAPIRec driDriverAPI = {
 };
 
 /* This is the table of extensions that the loader will dlsym() for. */
-PUBLIC const __DRIextension *__driDriverExtensions[] = {
+const __DRIextension *galliumsw_driver_extensions[] = {
     &driCoreExtension.base,
     &driSWRastExtension.base,
     &driCopySubBufferExtension.base,

src/gallium/targets/dri-swrast/Makefile.am

@@ -39,6 +39,7 @@ swrast_dri_la_LDFLAGS = $(GALLIUM_DRI_LINKER_FLAGS)
 
 swrast_dri_la_LIBADD = \
 	$(top_builddir)/src/mesa/drivers/dri/common/libdricommon.la \
+	$(top_builddir)/src/mesa/drivers/dri/common/libmegadriver_stub.la \
 	$(top_builddir)/src/gallium/state_trackers/dri/sw/libdrisw.la \
 	$(top_builddir)/src/gallium/winsys/sw/dri/libswdri.la \
 	$(top_builddir)/src/gallium/drivers/softpipe/libsoftpipe.la \

src/gallium/targets/dri-swrast/SConscript

@@ -2,6 +2,14 @@ Import('*')
 
 env = drienv.Clone()
 
+env.Append(CPPPATH = [
+    '#/src/loader',
+    '#/src/mapi',
+    '#/src/mesa',
+    '#/src/mesa/drivers/dri/common',
+    '#/src/gallium/state_trackers/dri/common',
+])
+
 env.Prepend(LIBS = [
     st_drisw,
     ws_dri,
@@ -10,6 +18,7 @@ env.Prepend(LIBS = [
     mesa,
     glsl,
     gallium,
+    megadrivers_stub,
     dri_common,
 ])
 

src/gallium/targets/dri-swrast/swrast_drm_api.c

@@ -34,6 +34,15 @@
 
 #include "state_tracker/drm_driver.h"
 #include "sw/dri/dri_sw_winsys.h"
+#include "dri_screen.h"
+
+const __DRIextension **__driDriverGetExtensions_swrast(void);
+
+PUBLIC const __DRIextension **__driDriverGetExtensions_swrast(void)
+{
+   globalDriverAPI = &galliumsw_driver_api;
+   return galliumsw_driver_extensions;
+}
 
 DRM_DRIVER_DESCRIPTOR("swrast", NULL, NULL, NULL);