From c4b4961ed14e665041cc7ea2a633a299ab1dbafc Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@google.com>
Date: Sun, 24 May 2020 03:52:13 +0200
Subject: [PATCH] xshm: fix compatibility with x input

---
 gfx/drivers/xshm_gfx.c | 52 +++++++++++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 18 deletions(-)

diff --git a/gfx/drivers/xshm_gfx.c b/gfx/drivers/xshm_gfx.c
index 851a8b6270..bad1ece8f7 100644
--- a/gfx/drivers/xshm_gfx.c
+++ b/gfx/drivers/xshm_gfx.c
@@ -32,15 +32,14 @@
 #include "../../menu/menu_driver.h"
 #endif
 
+#include "../../configuration.h"
+
 #include "../font_driver.h"
 
 #include "../common/x11_common.h"
 
 typedef struct xshm
 {
-   Display* display;
-   Window wndw;
-
    int width;
    int height;
 
@@ -57,20 +56,20 @@ static void *xshm_gfx_init(const video_info_t *video,
 
    XInitThreads();
 
-   xshm->display = XOpenDisplay(NULL);
+   g_x11_dpy = XOpenDisplay(NULL);
 
 #ifdef RARCH_INTERNAL
-   parent = DefaultRootWindow(xshm->display);
+   parent = DefaultRootWindow(g_x11_dpy);
 #else
    parent = video->parent;
 #endif
    XSetWindowAttributes attributes;
    attributes.border_pixel=0;
-   xshm->wndw = XCreateWindow(xshm->display, parent,
-                              0, 0, video->width, video->height,
-                              0, 24, CopyFromParent, NULL, CWBorderPixel, &attributes);
-   XSetWindowBackground(xshm->display, xshm->wndw, 0);
-   XMapWindow(xshm->display, xshm->wndw);
+   g_x11_win = XCreateWindow(g_x11_dpy, parent,
+			     0, 0, video->width, video->height,
+			     0, 24, CopyFromParent, NULL, CWBorderPixel, &attributes);
+   XSetWindowBackground(g_x11_dpy, g_x11_win, 0);
+   XMapWindow(g_x11_dpy, g_x11_win);
 
    xshm->shmInfo.shmid = shmget(IPC_PRIVATE, sizeof(uint32_t) * video->width * video->height,
                                 IPC_CREAT|0600);
@@ -78,20 +77,37 @@ static void *xshm_gfx_init(const video_info_t *video,
 
    xshm->shmInfo.shmaddr = (char*)shmat(xshm->shmInfo.shmid, 0, 0);
    xshm->shmInfo.readOnly = False;
-   XShmAttach(xshm->display, &xshm->shmInfo);
-   XSync(xshm->display, False);//no idea why this is required, but I get weird errors without it
-   xshm->image = XShmCreateImage(xshm->display, NULL, 24, ZPixmap,
+   XShmAttach(g_x11_dpy, &xshm->shmInfo);
+   XSync(g_x11_dpy, False);//no idea why this is required, but I get weird errors without it
+   xshm->image = XShmCreateImage(g_x11_dpy, NULL, 24, ZPixmap,
                                  xshm->shmInfo.shmaddr, &xshm->shmInfo, video->width, video->height);
 
-   xshm->gc = XCreateGC(xshm->display, xshm->wndw, 0, NULL);
+   xshm->gc = XCreateGC(g_x11_dpy, g_x11_win, 0, NULL);
 
    xshm->width = video->width;
    xshm->height = video->height;
 
-   if (input) *input = NULL;
-   if (input_data) *input_data = NULL;
+   if (!x11_input_ctx_new(true))
+      goto error;
+
+   if (input && input_data)
+   {
+      void *xinput                           = NULL;
+      settings_t *settings                   = config_get_ptr();
+      xinput = input_x.init(settings->arrays.input_joypad_driver);
+      if (xinput)
+      {
+         *input = &input_x;
+         *input_data = xinput;
+      }
+      else
+         *input = NULL;
+   }
 
    return xshm;
+ error:
+   free (xshm);
+   return NULL;
 }
 
 static bool xshm_gfx_frame(void *data, const void *frame, unsigned width,
@@ -110,9 +126,9 @@ static bool xshm_gfx_frame(void *data, const void *frame, unsigned width,
    menu_driver_frame(menu_is_alive, video_info);
 #endif
 
-   XShmPutImage(xshm->display, xshm->wndw, xshm->gc, xshm->image,
+   XShmPutImage(g_x11_dpy, g_x11_win, xshm->gc, xshm->image,
                 0, 0, 0, 0, xshm->width, xshm->height, False);
-   XFlush(xshm->display);
+   XFlush(g_x11_dpy);
 
    return true;
 }