Asynchronous Graphics Library (#2357)

An asynchronous graphics management library intended for SPI-based displays.

On first use several required python modules must be installed. Try building a sample application:

```
cd $SMING_HOME
make fetch Graphics
cd Libraries/Graphics/samples/Basic_Graphics
make python-requirements
make
```

Currently only the ILI9341 display has a driver, but you can use the virtual screen for testing.
This is a display device for use by the Host Emulator. The 'display' is a python application which communicates
with the Sming :cpp:class:`Graphics::Display::Virtual` display driver using a TCP socket.
Graphics processing is handled using SDL2.

To start the virtual screen server type ``make virtual-screen`` from your project directory.
The default TCP port is 7780. If you need to change this, use::

    make virtual-screen VSPORT=7780

The screen server's IP address is shown in the caption bar.
Build and run your project in host mode as follows::

    make SMING_ARCH=Host
    make run VSADDR=192.1.2.3

.gitmodules

@@ -199,6 +199,10 @@
 	path = Sming/Libraries/GoogleCast
 	url = https://github.com/slaff/Sming-GoogleCast.git
 	ignore = dirty
+[submodule "Libraries.Graphics"]
+	path = Sming/Libraries/Graphics
+	url = https://github.com/mikee47/Sming-Graphics
+	ignore = dirty
 [submodule "Libraries.HardwareSPI"]
 	path = Sming/Libraries/HardwareSPI
 	url = https://github.com/mikee47/HardwareSPI

Sming/Components/Storage/Tools/hwconfig/common.py

@@ -2,10 +2,12 @@
 # Common functions and definitions
 #
 
-import sys, json, platform
-from rjsmin import jsmin
+import os, sys, json, platform
 from collections import OrderedDict
 
+sys.path.insert(1, os.path.expandvars('${SMING_HOME}/../Tools/Python'))
+from rjsmin import jsmin
+
 quiet = False
 
 def status(msg):

Sming/Core/Data/Range.h

@@ -105,3 +105,8 @@ template <typename T> struct TRange {
 		return s;
 	}
 };
+
+template <typename T> inline String toString(TRange<T> range)
+{
+	return range.toString();
+}

Tools/Python/README.rst

@@ -0,0 +1,7 @@
+This directory is for commonly-used python modules. Example usage:
+
+    import os, sys
+
+    sys.path.insert(1, os.path.expandvars('${SMING_HOME}/../Tools/Python'))
+
+    from rjsmin import jsmin

Tools/install.sh

@@ -93,7 +93,12 @@ if [ -n "$APPVEYOR" ] || [ -n "$GITHUB_ACTION" ]; then
     $PKG_INSTALL \
         clang-format-8 \
         g++-9-multilib \
-        python3-setuptools
+        python3-setuptools \
+        fonts-ubuntu \
+        fonts-noto-mono \
+        xfonts-base \
+        fonts-urw-base35 \
+        fonts-droid-fallback
 
     sudo update-alternatives --set gcc /usr/bin/gcc-9
 

Tools/vscode/setup.py

@@ -210,7 +210,7 @@ def main():
         sys.exit(1)
 
     # So we can find rjsmin.py
-    sys.path.append(os.path.join(env['SMING_HOME'], 'Components/Storage/Tools/hwconfig'))
+    sys.path.append(os.path.join(env['SMING_HOME'], '../Tools/Python'))
 
     update_intellisense()
     update_tasks()