From d54a6e8e8a170591d6eb98c8e2d4236763258f5d Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Sat, 16 Apr 2016 20:56:22 +0300
Subject: kmscube: support X

---
 kmscube/kmscube.cpp | 106 ++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 78 insertions(+), 28 deletions(-)

(limited to 'kmscube/kmscube.cpp')

diff --git a/kmscube/kmscube.cpp b/kmscube/kmscube.cpp
index 1902970..e9145c9 100644
--- a/kmscube/kmscube.cpp
+++ b/kmscube/kmscube.cpp
@@ -35,6 +35,7 @@
 #include <xf86drm.h>
 #include <xf86drmMode.h>
 #include <gbm.h>
+#include <X11/Xlib-xcb.h>
 
 #include "esUtil.h"
 
@@ -456,17 +457,17 @@ private:
 	struct gbm_bo* bo_next;
 };
 
-class NullEglSurface
+class EglSurface
 {
 public:
-	NullEglSurface(const EglState& egl)
+	EglSurface(const EglState& egl, EGLNativeWindowType wnd)
 		: egl(egl)
 	{
-		esurface = eglCreateWindowSurface(egl.display(), egl.config(), 0, NULL);
+		esurface = eglCreateWindowSurface(egl.display(), egl.config(), wnd, NULL);
 		FAIL_IF(esurface == EGL_NO_SURFACE, "failed to create egl surface");
 	}
 
-	~NullEglSurface()
+	~EglSurface()
 	{
 		eglDestroySurface(egl.display(), esurface);
 	}
@@ -710,10 +711,68 @@ static void main_gbm()
 	}
 }
 
-static void main_egl()
+static void main_x()
+{
+	Display* display = XOpenDisplay(NULL);
+
+	xcb_connection_t *connection = XGetXCBConnection(display);
+
+	/* Get the first screen */
+	const xcb_setup_t      *setup  = xcb_get_setup (connection);
+	xcb_screen_t           *screen = xcb_setup_roots_iterator (setup).data;
+
+	/* Create the window */
+
+	uint32_t width = 600;
+	uint32_t height = 600;
+
+	const uint32_t xcb_window_attrib_mask = XCB_CW_EVENT_MASK;
+	const uint32_t xcb_window_attrib_list[] = {
+		XCB_EVENT_MASK_EXPOSURE,
+	};
+
+	xcb_window_t window = xcb_generate_id (connection);
+	xcb_create_window (connection,                    /* Connection          */
+			   XCB_COPY_FROM_PARENT,          /* depth (same as root)*/
+			   window,                        /* window Id           */
+			   screen->root,                  /* parent window       */
+			   0, 0,                          /* x, y                */
+			   width, height,                 /* width, height       */
+			   0,                             /* border_width        */
+			   XCB_WINDOW_CLASS_INPUT_OUTPUT, /* class               */
+			   screen->root_visual,           /* visual              */
+			   xcb_window_attrib_mask,
+			   xcb_window_attrib_list);
+
+	xcb_map_window (connection, window);
+	xcb_flush (connection);
+
+	EglState egl(reinterpret_cast<EGLNativeDisplayType>(display));
+	EglSurface surface(egl, reinterpret_cast<EGLNativeWindowType>(window));
+	GlScene scene;
+
+	scene.set_viewport(width, height);
+
+	int framenum = 0;
+
+	surface.make_current();
+	surface.swap_buffers();
+
+	xcb_generic_event_t *event;
+	while ( (event = xcb_poll_for_event (connection)) ) {
+
+		surface.make_current();
+		scene.draw(framenum++);
+		surface.swap_buffers();
+	}
+
+	xcb_disconnect (connection);
+}
+
+static void main_null()
 {
 	EglState egl(EGL_DEFAULT_DISPLAY);
-	NullEglSurface surface(egl);
+	EglSurface surface(egl, 0);
 	GlScene scene;
 
 	scene.set_viewport(600, 600);
@@ -749,31 +808,22 @@ int main(int argc, char *argv[])
 
 	optionset.parse(argc, argv);
 
-	int mode;
-
-	if (optionset.params().size() == 0) {
-		mode = 0;
-	} else {
-		const string m = optionset.params().front();
+	string m;
 
-		if (m == "gbm")
-			mode = 0;
-		else if (m == "null")
-			mode = 1;
-		else {
-			printf("Unknown mode %s\n", m.c_str());
-			return -1;
-		}
-	}
+	if (optionset.params().size() == 0)
+		m = "gbm";
+	else
+		m = optionset.params().front();
 
-	switch (mode) {
-	case 0:
+	if (m == "gbm")
 		main_gbm();
-		break;
-
-	case 1:
-		main_egl();
-		break;
+	else if (m == "null")
+		main_null();
+	else if (m == "x")
+		main_x();
+	else {
+		printf("Unknown mode %s\n", m.c_str());
+		return -1;
 	}
 
 	return 0;
-- 
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