Add null gfx context driver

Makefile.common

@@ -349,6 +349,7 @@ ifeq ($(HAVE_OPENGL), 1)
    OBJ += gfx/gl.o \
 			 gfx/gl_common.o \
 			 gfx/gfx_context.o \
+			 gfx/context/gfx_null_ctx.o \
 			 gfx/fonts/gl_font.o \
 			 gfx/fonts/gl_raster_font.o \
 			 gfx/math/matrix.o \

driver.c

@@ -28,6 +28,10 @@
 #include "audio/audio_thread_wrapper.h"
 #include "gfx/gfx_common.h"
 
+#ifdef HAVE_X11
+#include "gfx/context/x11_common.h"
+#endif
+
 #ifdef HAVE_MENU
 #include "frontend/menu/menu_common.h"
 #endif

gfx/context/gfx_null_ctx.c

@@ -0,0 +1,145 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2014 - Daniel De Matteis
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// Null context.
+
+#include "../../driver.h"
+#include "../gfx_context.h"
+#include "../gfx_common.h"
+
+static void gfx_ctx_null_swap_interval(void *data, unsigned interval)
+{
+   (void)data;
+   (void)interval;
+}
+
+static void gfx_ctx_null_check_window(void *data, bool *quit,
+      bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
+{
+   (void)frame_count;
+   (void)data;
+   (void)quit;
+   (void)width;
+   (void)height;
+   (void)resize;
+}
+
+static void gfx_ctx_null_swap_buffers(void *data)
+{
+   (void)data;
+}
+
+static void gfx_ctx_null_set_resize(void *data, unsigned width, unsigned height)
+{
+   (void)data;
+   (void)width;
+   (void)height;
+}
+
+static void gfx_ctx_null_update_window_title(void *data)
+{
+   (void)data;
+}
+
+static void gfx_ctx_null_get_video_size(void *data, unsigned *width, unsigned *height)
+{
+   (void)data;
+   *width  = 320;
+   *height = 240;
+}
+
+static bool gfx_ctx_null_set_video_mode(void *data,
+      unsigned width, unsigned height,
+      bool fullscreen)
+{
+   (void)data;
+   (void)width;
+   (void)height;
+   (void)fullscreen;
+
+   return true;
+}
+
+static void gfx_ctx_null_destroy(void *data)
+{
+   (void)data;
+}
+
+static void gfx_ctx_null_input_driver(void *data, const input_driver_t **input, void **input_data)
+{
+   (void)data;
+   (void)input;
+   (void)input_data;
+}
+
+static bool gfx_ctx_null_has_focus(void *data)
+{
+   (void)data;
+
+   return true;
+}
+
+static bool gfx_ctx_null_bind_api(void *data, enum gfx_ctx_api api, unsigned major, unsigned minor)
+{
+   (void)data;
+   (void)api;
+   (void)major;
+   (void)minor;
+
+   return true;
+}
+
+static void gfx_ctx_null_show_mouse(void *data, bool state)
+{
+   (void)data;
+   (void)state;
+}
+
+static void gfx_ctx_null_bind_hw_render(void *data, bool enable)
+{
+   (void)data;
+   (void)enable;
+}
+
+static bool gfx_ctx_null_init(void *data)
+{
+   (void)data;
+
+   return true;
+}
+
+const gfx_ctx_driver_t gfx_ctx_null = {
+   gfx_ctx_null_init,
+   gfx_ctx_null_destroy,
+   gfx_ctx_null_bind_api,
+   gfx_ctx_null_swap_interval,
+   gfx_ctx_null_set_video_mode,
+   gfx_ctx_null_get_video_size,
+   NULL,
+   gfx_ctx_null_update_window_title,
+   gfx_ctx_null_check_window,
+   gfx_ctx_null_set_resize,
+   gfx_ctx_null_has_focus,
+   gfx_ctx_null_swap_buffers,
+   gfx_ctx_null_input_driver,
+   NULL,
+   NULL,
+   NULL,
+   gfx_ctx_null_show_mouse,
+   "null",
+   gfx_ctx_null_bind_hw_render,
+};
+

gfx/gfx_context.c

@@ -69,6 +69,7 @@ static const gfx_ctx_driver_t *gfx_ctx_drivers[] = {
 #ifdef EMSCRIPTEN
    &gfx_ctx_emscripten,
 #endif
+   &gfx_ctx_null,
    NULL
 };
 

griffin/griffin.c

@@ -101,6 +101,7 @@ VIDEO CONTEXT
 ============================================================ */
 
 #include "../gfx/gfx_context.c"
+#include "../gfx/context/gfx_null_ctx.c"
 
 #if defined(__CELLOS_LV2__)
 #include "../gfx/context/ps3_ctx.c"