Backport Opendingux/GCW Zero patches courtesy of gama.coder

Makefile.common

@@ -525,6 +525,12 @@ ifeq ($(HAVE_XINPUT), 1)
           input/autoconf/builtin_win.o
 endif
 
+ifeq ($(HAVE_OPENDINGUX_FBDEV), 1)
+	OBJ += gfx/drivers_context/opendingux_fbdev_ctx.o
+	DEFINES += $(EGL_CFLAGS)
+	LIBS += $(EGL_LIBS)
+endif
+
 ifeq ($(HAVE_X11), 1)
    OBJ += input/common/input_x11_common.o \
           input/drivers/x11_input.o \

gfx/drivers_context/opendingux_fbdev_ctx.c

@@ -0,0 +1,288 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
+ *  Copyright (C) 2014 2015 - Jean-Andre Santoni
+ * 
+ *  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/>.
+ */
+
+#include <signal.h>
+
+#include "../../driver.h"
+#include "../../general.h"
+#include "../../runloop.h"
+
+#ifdef HAVE_EGL
+#include "../common/egl_common.h"
+#endif
+
+#if defined(HAVE_OPENGLES)
+#include "../common/gl_common.h"
+#endif
+
+typedef struct
+{
+#ifdef HAVE_EGL
+   egl_ctx_data_t egl;
+#endif
+   bool resize;
+   unsigned width, height;
+} opendingux_ctx_data_t;
+
+static void gfx_ctx_opendingux_destroy(void *data)
+{
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+   if (!viv)
+      return;
+
+#ifdef HAVE_EGL
+   egl_destroy(&viv->egl);
+#endif
+
+   viv->resize       = false;
+   free(viv);
+}
+
+static void *gfx_ctx_opendingux_init(void *video_driver)
+{
+   EGLint n;
+   EGLint major, minor;
+   EGLint format;
+   static const EGLint attribs[] = {
+#if 0
+      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+      EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+#endif
+      EGL_BLUE_SIZE,  5,
+      EGL_GREEN_SIZE, 6,
+      EGL_RED_SIZE,   5,
+      EGL_ALPHA_SIZE, 0,
+      EGL_SAMPLES,    0,
+      EGL_NONE
+   };
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)
+      calloc(1, sizeof(*viv));
+
+   if (!viv)
+      return NULL;
+   
+      (void)video_driver;
+
+#ifdef HAVE_EGL
+   egl_install_sighandlers();
+
+   if (!egl_init_context(&viv->egl, EGL_DEFAULT_DISPLAY,
+            &major, &minor,
+            &n, attribs))
+   {
+      egl_report_error();
+      goto error;
+   }
+#endif
+
+   return viv;
+
+error:
+   RARCH_ERR("[opendingux fbdev]: EGL error: %d.\n", eglGetError());
+   gfx_ctx_opendingux_destroy(viv);
+   return NULL;
+}
+
+static void gfx_ctx_opendingux_get_video_size(void *data,
+      unsigned *width, unsigned *height)
+{
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+   *width  = viv->width;
+   *height = viv->height;
+}
+
+static void gfx_ctx_opendingux_check_window(void *data, bool *quit,
+      bool *resize, unsigned *width, unsigned *height, unsigned frame_count)
+{
+   unsigned new_width, new_height;
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+#ifdef HAVE_EGL
+   egl_get_video_size(&viv->egl, &new_width, &new_height);
+#endif
+
+   if (new_width != *width || new_height != *height)
+   {
+      *width  = new_width;
+      *height = new_height;
+      *resize = true;
+   }
+
+   *quit = g_egl_quit;
+}
+
+static bool gfx_ctx_opendingux_set_resize(void *data,
+      unsigned width, unsigned height)
+{
+   (void)data;
+   (void)width;
+   (void)height;
+   return false;
+}
+
+static void gfx_ctx_opendingux_update_window_title(void *data)
+{
+   char buf[128]        = {0};
+   char buf_fps[128]    = {0};
+   settings_t *settings = config_get_ptr();
+
+   (void)data;
+
+   video_monitor_get_fps(buf, sizeof(buf),
+         buf_fps, sizeof(buf_fps));
+   if (settings->fps_show)
+      runloop_msg_queue_push(buf_fps, 1, 1, false);
+}
+
+static bool gfx_ctx_opendingux_set_video_mode(void *data,
+      unsigned width, unsigned height,
+      bool fullscreen)
+{
+   EGLNativeWindowType window;
+   static const EGLint attribs[] = {
+      EGL_CONTEXT_CLIENT_VERSION, 2, /* Use version 2, even for GLES3. */
+      EGL_NONE
+   };
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+   /* Pick some arbitrary default. */
+   if (!width || !fullscreen)
+      width = 1280;
+   if (!height || !fullscreen)
+      height = 1024;
+
+   viv->width    = width;
+   viv->height   = height;
+
+#ifdef HAVE_EGL
+   if (!egl_create_context(&viv->egl, attribs))
+   {
+      egl_report_error();
+      goto error;
+   }
+
+   window = 0;
+   if (!egl_create_surface(&viv->egl, window))
+      goto error;
+#endif
+
+   return true;
+
+error:
+   RARCH_ERR("[opendingux fbdev]: EGL error: %d.\n", eglGetError());
+   gfx_ctx_opendingux_destroy(data);
+   return false;
+}
+
+static void gfx_ctx_opendingux_input_driver(void *data,
+      const input_driver_t **input, void **input_data)
+{
+   (void)data;
+   *input = NULL;
+   *input_data = NULL;
+}
+
+static bool gfx_ctx_opendingux_bind_api(void *data,
+      enum gfx_ctx_api api, unsigned major, unsigned minor)
+{
+   (void)data;
+   return api == GFX_CTX_OPENGL_ES_API;
+}
+
+static bool gfx_ctx_opendingux_has_focus(void *data)
+{
+   (void)data;
+   return true;
+}
+
+static bool gfx_ctx_opendingux_suppress_screensaver(void *data, bool enable)
+{
+   (void)data;
+   (void)enable;
+   return false;
+}
+
+static bool gfx_ctx_opendingux_has_windowed(void *data)
+{
+   (void)data;
+   return false;
+}
+
+static void gfx_ctx_opendingux_swap_buffers(void *data)
+{
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+#ifdef HAVE_EGL
+   egl_swap_buffers(&viv->egl);
+#endif
+}
+
+static void gfx_ctx_opendingux_set_swap_interval(
+      void *data, unsigned swap_interval)
+{
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+#ifdef HAVE_EGL
+   egl_set_swap_interval(&viv->egl, swap_interval);
+#endif
+}
+
+
+static gfx_ctx_proc_t gfx_ctx_opendingux_get_proc_address(const char *symbol)
+{
+#ifdef HAVE_EGL
+   return egl_get_proc_address(symbol);
+#else
+}
+
+static void gfx_ctx_opendingux_bind_hw_render(void *data, bool enable)
+{
+   opendingux_ctx_data_t *viv = (opendingux_ctx_data_t*)data;
+
+#ifdef HAVE_EGL
+   egl_bind_hw_render(&viv->egl, enable);
+#endif
+}
+
+const gfx_ctx_driver_t gfx_ctx_opendingux_fbdev = {
+   gfx_ctx_opendingux_init,
+   gfx_ctx_opendingux_destroy,
+   gfx_ctx_opendingux_bind_api,
+   gfx_ctx_opendingux_set_swap_interval,
+   gfx_ctx_opendingux_set_video_mode,
+   gfx_ctx_opendingux_get_video_size,
+   NULL, /* get_video_output_size */
+   NULL, /* get_video_output_prev */
+   NULL, /* get_video_output_next */
+   NULL, /* get_metrics */
+   NULL,
+   gfx_ctx_opendingux_update_window_title,
+   gfx_ctx_opendingux_check_window,
+   gfx_ctx_opendingux_set_resize,
+   gfx_ctx_opendingux_has_focus,
+   gfx_ctx_opendingux_suppress_screensaver,
+   gfx_ctx_opendingux_has_windowed,
+   gfx_ctx_opendingux_swap_buffers,
+   gfx_ctx_opendingux_input_driver,
+   gfx_ctx_opendingux_get_proc_address,
+   NULL,
+   NULL,
+   NULL,
+   "opendingux-fbdev",
+   gfx_ctx_opendingux_bind_hw_render
+};

gfx/video_context_driver.c

@@ -43,6 +43,9 @@ static const gfx_ctx_driver_t *gfx_ctx_drivers[] = {
 #if defined(HAVE_VIVANTE_FBDEV)
    &gfx_ctx_vivante_fbdev,
 #endif
+#if defined(HAVE_OPENDINGUX_FBDEV)
+   &gfx_ctx_opendingux_fbdev,
+#endif
 #if defined(_WIN32) && defined(HAVE_OPENGL)
    &gfx_ctx_wgl,
 #endif

gfx/video_context_driver.h

@@ -263,6 +263,7 @@ extern const gfx_ctx_driver_t gfx_ctx_bbqnx;
 extern const gfx_ctx_driver_t gfx_ctx_cgl;
 extern const gfx_ctx_driver_t gfx_ctx_cocoagl;
 extern const gfx_ctx_driver_t gfx_ctx_emscripten;
+extern const gfx_ctx_driver_t gfx_ctx_opendingux_fbdev;
 extern const gfx_ctx_driver_t gfx_ctx_null;
 
 /**

libretro-common/include/retro_miscellaneous.h

@@ -68,6 +68,7 @@
 #define M_PI 3.14159265358979323846264338327
 #endif
 
+#ifndef __cplusplus
 #ifndef max
 #define max(a, b) ((a) > (b) ? (a) : (b))
 #endif
@@ -75,6 +76,7 @@
 #ifndef min
 #define min(a, b) ((a) < (b) ? (a) : (b))
 #endif
+#endif
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 #define RARCH_SCALE_BASE 256

qb/config.params.sh

@@ -1,10 +1,10 @@
-HAVE_LIBRETRODB=yes     # Disable libretrodb
+HAVE_LIBRETRODB=yes        # Enable libretrodb
-HAVE_RGUI=yes           # Disable RGUI menu
+HAVE_RGUI=yes              # Enable RGUI menu
 HAVE_MATERIALUI=auto       # Enable MaterialUI menu 
 HAVE_CHEEVOS=no            # Enable Cheevos (achievements)
 HAVE_XMB=auto              # Enable XMB menu
 HAVE_ZAHNRAD=no            # Enable Zahnrad menu
-HAVE_DYNAMIC=yes        # Disable dynamic loading of libretro library
+HAVE_DYNAMIC=yes           # Enable dynamic loading of libretro library
 HAVE_SDL=auto              # SDL support
 HAVE_SDL2=auto             # SDL2 support (disables SDL 1.x)
 C89_SDL2=no
@@ -21,11 +21,12 @@ C89_FFMPEG=no
 HAVE_DYLIB=auto            # Enable dynamic loading support
 HAVE_NETWORKING=auto       # Enable networking features (recommended)
 HAVE_NETPLAY=auto          # Enable netplay support (requires networking)
-HAVE_D3D9=yes           # Disable Direct3D 9 support
+HAVE_D3D9=yes              # Enable Direct3D 9 support
 HAVE_OPENGL=auto           # Enable OpenGL support
 HAVE_GLES=no               # Use GLESv2 instead of desktop GL
 HAVE_MALI_FBDEV=no         # Enable Mali fbdev context support
 HAVE_VIVANTE_FBDEV=no      # Enable Vivante fbdev context support
+HAVE_OPENDINGUX_FBDEV=no   # Enable Opendingux fbdev context support
 HAVE_GLES3=no              # Enable OpenGLES3 support
 HAVE_X11=auto              # Enable everything X11.
 HAVE_OMAP=no               # Enable OMAP video support
@@ -53,7 +54,7 @@ HAVE_COREAUDIO=auto     # Enable CoreAudio support
 HAVE_PULSE=auto            # Enable PulseAudio support
 C89_PULSE=no
 HAVE_FREETYPE=auto         # Enable FreeType support
-HAVE_STB_FONT=yes       # Disable stb_truetype font support
+HAVE_STB_FONT=yes          # Enable stb_truetype font support
 HAVE_XVIDEO=auto           # Enable XVideo support
 HAVE_PYTHON=auto           # Enable Python 3 support for shaders
 C89_PYTHON=no
@@ -63,13 +64,13 @@ HAVE_SSE=no             # Forcefully enable x86 SSE optimizations (SSE, SSE2)
 HAVE_FLOATHARD=no          # Force hard float ABI (for ARM)
 HAVE_FLOATSOFTFP=no        # Force soft float ABI (for ARM)
 HAVE_7ZIP=yes              # Compile in 7z support
-HAVE_PRESERVE_DYLIB=no  # Disable dlclose() for Valgrind support
+HAVE_PRESERVE_DYLIB=no     # Enable dlclose() for Valgrind support
 HAVE_PARPORT=auto          # Parallel port joypad support
 HAVE_IMAGEVIEWER=yes       # Built-in image viewer support.
 C89_IMAGEVIEWER=no         # stb_image hates C89
 HAVE_MMAP=auto             # MMAP support
 HAVE_QT=no                 # QT companion support
 HAVE_XSHM=no               # XShm video driver support (disabled because it's just a dummied out stub)
-HAVE_CHEEVOS=yes        # Disable Retro Achievements
+HAVE_CHEEVOS=yes           # Enable Retro Achievements
 HAVE_VULKAN=auto           # Enable Vulkan support
 C89_VULKAN=no