Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/rdtk/sample/rdtk_x11.c

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+/**
+ * RdTk: Remote Desktop Toolkit
+ *
+ * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <rdtk/config.h>
+
+#include <stdint.h>
+
+#include <winpr/wlog.h>
+#include <winpr/assert.h>
+#include <winpr/cast.h>
+#include <rdtk/rdtk.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#define TAG "rdtk.sample"
+
+int main(int argc, char** argv)
+{
+	int rc = 1;
+	int pf_count = 0;
+	XEvent event;
+	XImage* image = nullptr;
+	Pixmap pixmap = 0;
+	Window window = 0;
+	rdtkSurface* surface = nullptr;
+
+	WINPR_UNUSED(argc);
+	WINPR_UNUSED(argv);
+
+	Display* display = XOpenDisplay(nullptr);
+
+	if (!display)
+	{
+		WLog_ERR(TAG, "Cannot open display");
+		return 1;
+	}
+
+	const INT32 x = 10;
+	const INT32 y = 10;
+	const UINT32 width = 640;
+	const UINT32 height = 480;
+
+	const int screen_number = DefaultScreen(display);
+	const Screen* screen = ScreenOfDisplay(display, screen_number);
+	Visual* visual = DefaultVisual(display, screen_number);
+	const GC gc = DefaultGC(display, screen_number);
+	const int depth = DefaultDepthOfScreen(screen);
+	const Window root_window = RootWindow(display, screen_number);
+	const unsigned long border = BlackPixel(display, screen_number);
+	const unsigned long background = WhitePixel(display, screen_number);
+
+	int scanline_pad = 0;
+
+	XPixmapFormatValues* pfs = XListPixmapFormats(display, &pf_count);
+
+	for (int index = 0; index < pf_count; index++)
+	{
+		XPixmapFormatValues* pf = &pfs[index];
+
+		if (pf->depth == depth)
+		{
+			scanline_pad = pf->scanline_pad;
+			break;
+		}
+	}
+
+	XFree(pfs);
+
+	rdtkEngine* engine = rdtk_engine_new();
+	const size_t scanline = width * 4ULL;
+	uint8_t* buffer = (uint8_t*)calloc(height, scanline);
+	if (!engine || !buffer || (depth < 0))
+		goto fail;
+
+	surface = rdtk_surface_new(engine, buffer, width, height, scanline);
+
+	if (rdtk_surface_fill(surface, 0, 0, width, height, 0x3BB9FF) < 0)
+		goto fail;
+	if (rdtk_label_draw(surface, 16, 16, 128, 32, nullptr, "label", 0, 0) < 0)
+		goto fail;
+	if (rdtk_button_draw(surface, 16, 64, 128, 32, nullptr, "button") < 0)
+		goto fail;
+	if (rdtk_text_field_draw(surface, 16, 128, 128, 32, nullptr, "text field") < 0)
+		goto fail;
+
+	window = XCreateSimpleWindow(display, root_window, x, y, width, height, 1, border, background);
+
+	XSelectInput(display, window, ExposureMask | KeyPressMask);
+	XMapWindow(display, window);
+
+	XSetFunction(display, gc, GXcopy);
+	XSetFillStyle(display, gc, FillSolid);
+
+	pixmap = XCreatePixmap(display, window, width, height, (unsigned)depth);
+
+	image = XCreateImage(display, visual, (unsigned)depth, ZPixmap, 0, (char*)buffer, width, height,
+	                     scanline_pad, 0);
+
+	while (1)
+	{
+		XNextEvent(display, &event);
+
+		if (event.type == Expose)
+		{
+			XPutImage(display, pixmap, gc, image, 0, 0, 0, 0, width, height);
+			XCopyArea(display, pixmap, window, gc, 0, 0, width, height, 0, 0);
+		}
+
+		if (event.type == KeyPress)
+			break;
+
+		if (event.type == ClientMessage)
+			break;
+	}
+
+	XFlush(display);
+
+	rc = 0;
+fail:
+	if (image)
+		XDestroyImage(image);
+	XCloseDisplay(display);
+
+	rdtk_surface_free(surface);
+	free(buffer);
+
+	rdtk_engine_free(engine);
+
+	return rc;
+}