Fun little drawing side-project

Raylib and SDL3 are vendored under vendor/; SDL3 does not need to be installed system-wide. By default, the app links prebuilt static archives from vendor/raylib/<platform>/lib and vendor/SDL/<platform>/lib, where <platform> is windows or unix.

To regenerate those archives on the current platform:

cmake -S . -B build-vendor -DMYCANVAS_BUILD_VENDOR_LIBS=ON -DCMAKE_BUILD_TYPE=Release
cmake --build build-vendor --target SDL3-static raylib

-- Unix Systems:

	$ mkdir build
	$ cd build/
	$ cmake ..
	$ make

• Running:

	// running temporarily
	$ ./myCanvas

	// running with a file to load/save
	$ ./myCanvas -f fileName

	// running with window dimensoins (defaults: width = 800, height = 600)
	$ ./myCanvas -w 1920 -h 1080

	// running with window dimensoins and file to load/save
	$ ./myCanvas -w 1920 -h 1080 -f fileName

-- Windows Systems:

	$ cmake -S . -B build -G "MinGW Makefiles"
	$ cmake --build build

• Running:

	// running temporarily
	$ myCanvas.exe

	// running with a file to load/save
	$ myCanvas.exe -f fileName

	// running with window dimensoins (defaults: width = 800, height = 600)
	$ myCanvas.exe -w 1920 -h 1080

	// running with window dimensoins and file to load/save
	$ myCanvas.exe -w 1920 -h 1080 -f fileName

• LeftMouseDown = Draw
• Shift + LeftMouseDown + (Move Mouse Left/Right) = Resize Brush
• E = Toggle Eraser/Brush
• Ctrl+1 -> Ctrl+4 = Transparency from 25% -> 100%

• Ctrl+E = Create Layer
• Ctrl+W = Move up a layer
• Ctrl+S = Move down a layer
• Ctrl+Shift+W = Shift a layer up
• Ctrl+Shift+S = Shift a layer down
• Ctrl+A/D = Cycle between Blending Modes

• Space + LeftMouseDown = Pan
• Ctrl + Space + LeftMouseDown + (Move Mouse Up/Down) = Zoom In/Out
• Ctrl+Z = Undo (max of 10 undos)
• Ctrl+Shift+Z = Redo
• Enter = Save