// http://stackoverflow.com/questions/99353/how-to-test-if-a-line-segment-intersects-an-axis-aligned-rectange-in-2d
public static bool HasIntersection(SDL.SDL_Rect rect, int x1, int y1, int x2, int y2)
{
Func<int, int, double> implicitLineEqn = new Func<int, int, double>((x, y) => { return ((y2 - y1) * x) + ((x1 - x2) * y) + ((x2 * y1) - (x1 * y2)) * 1.0; });
double topLeft = implicitLineEqn(rect.x, rect.y);
double topRight = implicitLineEqn(rect.x + rect.w, rect.y);
double bottomLeft = implicitLineEqn(rect.x, rect.y + rect.h);
double bottomRight = implicitLineEqn(rect.x + rect.w, rect.y + rect.h);
if ((topLeft < 0 && topRight < 0 && bottomLeft < 0 && bottomRight < 0) || (topLeft > 0 && topRight > 0 && bottomLeft > 0 && bottomRight > 0))
{
return false;
}
if ((x1 > rect.x + rect.w) && (x2 > rect.x + rect.w))
{
return false;
}
else if ((x1 < rect.x) && (x2 < rect.x))
{
return false;
}
else if ((y1 < rect.y) && (y2 < rect.y))
{
return false;
}
else if ((y1 > rect.y + rect.h) && (y2 > rect.y + rect.h))
{
return false;
}
else
{
return true;
}
}
public SDL2Renderer(SDL2Window window, int index, SDL.SDL_RendererFlags flags)
{
Renderer = SDL.SDL_CreateRenderer(window.Window, index, (uint)flags);
if (Renderer == IntPtr.Zero)
{
throw new Exception("SDL_CreateRenderer()", new Exception(SDL.SDL_GetError()));
}
}
public SDL2Window(string title, int x, int y, int w, int h, SDL.SDL_WindowFlags flags)
{
Window = SDL.SDL_CreateWindow(title, x, y, w, h, flags);
if (Window == IntPtr.Zero)
{
throw new Exception("SDL_CreateWindow()", new Exception(SDL.SDL_GetError()));
}
}
public MouseWheelEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
RawTimeStamp = rawEvent.wheel.timestamp;
WindowID = rawEvent.wheel.windowID;
MouseDeviceID = rawEvent.wheel.which;
HorizontalScrollAmount = rawEvent.wheel.x;
VerticalScrollAmount = rawEvent.wheel.y;
}
public WindowEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
SubEventType = (WindowEventType)rawEvent.window.windowEvent;
Data1 = rawEvent.window.data1;
Data2 = rawEvent.window.data2;
RawTimeStamp = rawEvent.window.timestamp;
WindowID = rawEvent.window.windowID;
}
public KeyboardEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
RawTimeStamp = rawEvent.key.timestamp;
repeat = rawEvent.key.repeat;
KeyInformation = new KeyInformation(rawEvent.key.keysym.scancode, rawEvent.key.keysym.sym, rawEvent.key.keysym.mod);
State = (KeyState)rawEvent.key.state;
WindowID = rawEvent.key.windowID;
}
public MouseButtonEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
RawTimeStamp = rawEvent.button.timestamp;
WindowID = rawEvent.button.windowID;
MouseDeviceID = rawEvent.button.which;
MouseButton = (MouseButtonCode)rawEvent.button.button;
State = (MouseButtonState)rawEvent.button.state;
RelativeToWindowX = rawEvent.button.x;
RelativeToWindowY = rawEvent.button.y;
}
public Window(
string title,
Point2d<int> position,
Size2d<int> size,
SDL.SDL_WindowFlags flags)
{
window = SDL.SDL_CreateWindow(
title,
position.X,
position.Y,
size.Width,
size.Height,
flags);
}
public TextInputEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
RawTimeStamp = rawEvent.text.timestamp;
WindowID = rawEvent.text.windowID;
byte[] rawBytes = new byte[SDL2.SDL.SDL_TEXTINPUTEVENT_TEXT_SIZE];
// we have an unsafe pointer to a char array from SDL, explicitly marshal this to a byte array of fixed size
unsafe { Marshal.Copy((IntPtr)rawEvent.text.text, rawBytes, 0, SDL2.SDL.SDL_TEXTINPUTEVENT_TEXT_SIZE); }
// look for the index of the first null terminator
int length = Array.IndexOf(rawBytes, (byte)0);
// according to the SDL2 migration guide, TextInputEvent will have a UTF-8 encoded string
Text = System.Text.Encoding.UTF8.GetString(rawBytes, 0, length);
}
public MouseMotionEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
RawTimeStamp = rawEvent.motion.timestamp;
WindowID = rawEvent.motion.windowID;
MouseDeviceID = rawEvent.motion.which;
RelativeToWindowX = rawEvent.motion.x;
RelativeToWindowY = rawEvent.motion.y;
RelativeToLastMotionEventX = rawEvent.motion.xrel;
RelativeToLastMotionEventY = rawEvent.motion.yrel;
List<MouseButtonCode> buttonsPressed = new List<MouseButtonCode>();
if (SDL.SDL_BUTTON(rawEvent.motion.state) == SDL.SDL_BUTTON_LEFT)
buttonsPressed.Add(MouseButtonCode.Left);
if (SDL.SDL_BUTTON(rawEvent.motion.state) == SDL.SDL_BUTTON_MIDDLE)
buttonsPressed.Add(MouseButtonCode.Middle);
if (SDL.SDL_BUTTON(rawEvent.motion.state) == SDL.SDL_BUTTON_RIGHT)
buttonsPressed.Add(MouseButtonCode.Right);
if (SDL.SDL_BUTTON(rawEvent.motion.state) == SDL.SDL_BUTTON_X1)
buttonsPressed.Add(MouseButtonCode.X1);
if (SDL.SDL_BUTTON(rawEvent.motion.state) == SDL.SDL_BUTTON_X2)
buttonsPressed.Add(MouseButtonCode.X2);
MouseButtonsPressed = buttonsPressed;
}
public static extern IntPtr TTF_RenderUTF8_Blended_Wrapped( IntPtr font, [In()] [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(LPUtf8StrMarshaler))] string text, SDL.SDL_Color fg, uint wrapped );
public static extern IntPtr TTF_RenderText_Blended( IntPtr font, [In()] [MarshalAs(UnmanagedType.LPStr)] string text, SDL.SDL_Color fg );
public static extern IntPtr TTF_RenderUNICODE_Shaded( IntPtr font, [In()] [MarshalAs(UnmanagedType.LPWStr)] string text, SDL.SDL_Color fg, SDL.SDL_Color bg );
public static string Mix_GetMusicDecoder(int index)
{
return(SDL.UTF8_ToManaged(
INTERNAL_Mix_GetMusicDecoder(index)
));
}
public static IntPtr Mix_LoadMUS(string file)
{
return(INTERNAL_Mix_LoadMUS(SDL.UTF8_ToNative(file)));
}
public static string Mix_GetMusicTitle(IntPtr music)
{
return(SDL.UTF8_ToManaged(
INTERNAL_Mix_GetMusicTitle(music)
));
}
/// <summary>
/// Process a single event and dispatch it to the right window.
/// </summary>
public static void ProcessEvent(SDL.SDL_Event e)
{
Window ctrl = null;
// Code below is to extract the associated `Window' instance and to find out the window
// with focus. In the future, we could even add events handled at the application level.
switch (e.type)
{
case SDL.SDL_EventType.SDL_MOUSEBUTTONDOWN:
case SDL.SDL_EventType.SDL_MOUSEBUTTONUP:
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.button.windowID));
break;
case SDL.SDL_EventType.SDL_MOUSEMOTION:
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.motion.windowID));
break;
case SDL.SDL_EventType.SDL_MOUSEWHEEL:
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.wheel.windowID));
break;
case SDL.SDL_EventType.SDL_KEYDOWN:
case SDL.SDL_EventType.SDL_KEYUP:
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.key.windowID));
break;
case SDL.SDL_EventType.SDL_TEXTEDITING:
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.edit.windowID));
break;
case SDL.SDL_EventType.SDL_TEXTINPUT:
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.text.windowID));
break;
case SDL.SDL_EventType.SDL_WINDOWEVENT:
{
ctrl = WindowFromSdlHandle(SDL.SDL_GetWindowFromID(e.window.windowID));
switch (e.window.windowEvent)
{
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_FOCUS_GAINED:
WindowWithFocus = ctrl;
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_FOCUS_LOST:
WindowWithFocus = null;
break;
}
break;
}
}
ctrl?.ProcessEvent(e);
}
public void RenderCopy(IntPtr texture, SDL.SDL_Rect srcrect, SDL.SDL_Rect dstrect)
{
if (SDL.SDL_RenderCopy(Renderer, texture, ref srcrect, ref dstrect) != 0)
{
throw new Exception("SDL_RenderCopy()", new Exception(SDL.SDL_GetError()));
}
}
public static extern IntPtr TTF_RenderUNICODE_Blended_Wrapped( IntPtr font, [In()] [MarshalAs(UnmanagedType.LPWStr)] string text, SDL.SDL_Color fg, uint wrapped );
public static void SDL_IMAGE_VERSION(out SDL.SDL_version X)
{
X.major = SDL_IMAGE_MAJOR_VERSION;
X.minor = SDL_IMAGE_MINOR_VERSION;
X.patch = SDL_IMAGE_PATCHLEVEL;
}
public static string Mix_GetMusicCopyrightTag(IntPtr music)
{
return(SDL.UTF8_ToManaged(
INTERNAL_Mix_GetMusicCopyrightTag(music)
));
}
public static string Mix_GetTimidityCfg()
{
return(SDL.UTF8_ToManaged(
INTERNAL_Mix_GetTimidityCfg()
));
}
public static string Mix_GetSoundFonts()
{
return(SDL.UTF8_ToManaged(
INTERNAL_Mix_GetSoundFonts()
));
}
public static int Mix_SetSoundFonts(string paths)
{
return(INTERNAL_Mix_SetSoundFonts(
SDL.UTF8_ToNative(paths)
));
}
public static int Mix_SetMusicCMD(string command)
{
return(INTERNAL_Mix_SetMusicCMD(
SDL.UTF8_ToNative(command)
));
}
public static extern IntPtr TTF_RenderGlyph_Blended( IntPtr font, ushort ch, SDL.SDL_Color fg );
public void RenderDrawPoints(SDL.SDL_Point[] points)
{
if (SDL.SDL_RenderDrawPoints(Renderer, points, points.Length) != 0)
{
throw new Exception("SDL_RenderDrawPoints()", new Exception(SDL.SDL_GetError()));
}
}
/// <summary>
/// Process events for the current window
/// </summary>
public virtual void ProcessEvent(SDL.SDL_Event e)
{
switch (e.type)
{
case SDL.SDL_EventType.SDL_QUIT:
// When SDL sends a SDL_QUIT message, we have actually clicked on the close button.
CloseActions?.Invoke();
break;
case SDL.SDL_EventType.SDL_MOUSEBUTTONDOWN:
PointerButtonPressActions?.Invoke(e.button);
break;
case SDL.SDL_EventType.SDL_MOUSEBUTTONUP:
PointerButtonReleaseActions?.Invoke(e.button);
break;
case SDL.SDL_EventType.SDL_MOUSEMOTION:
MouseMoveActions?.Invoke(e.motion);
break;
case SDL.SDL_EventType.SDL_MOUSEWHEEL:
// To match the Windows behavior we multiply the value by 120
e.wheel.x *= 120;
e.wheel.y *= 120;
MouseWheelActions?.Invoke(e.wheel);
break;
case SDL.SDL_EventType.SDL_KEYDOWN:
KeyDownActions?.Invoke(e.key);
break;
case SDL.SDL_EventType.SDL_KEYUP:
KeyUpActions?.Invoke(e.key);
break;
case SDL.SDL_EventType.SDL_TEXTEDITING:
TextEditingActions?.Invoke(e.edit);
break;
case SDL.SDL_EventType.SDL_TEXTINPUT:
TextInputActions?.Invoke(e.text);
break;
case SDL.SDL_EventType.SDL_WINDOWEVENT:
{
switch (e.window.windowEvent)
{
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_SIZE_CHANGED:
ResizeBeginActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_RESIZED:
ResizeEndActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_CLOSE:
CloseActions?.Invoke();
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_SHOWN:
ActivateActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_HIDDEN:
DeActivateActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_MINIMIZED:
MinimizedActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_MAXIMIZED:
MaximizedActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_RESTORED:
RestoredActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_ENTER:
MouseEnterActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_LEAVE:
MouseLeaveActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_FOCUS_GAINED:
FocusGainedActions?.Invoke(e.window);
break;
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_FOCUS_LOST:
FocusLostActions?.Invoke(e.window);
break;
}
break;
}
}
}
public void RenderReadPixels(SDL.SDL_Rect rect, uint format, IntPtr pixels, int pitch)
{
if (SDL.SDL_RenderReadPixels(Renderer, ref rect, format, pixels, pitch) != 0)
{
throw new Exception("SDL_RenderReadPixels()", new Exception(SDL.SDL_GetError()));
}
}
public static IntPtr IMG_Load(string file)
{
return(INTERNAL_IMG_Load(SDL.UTF8_ToNative(file)));
}
public void SetRenderDrawBlendMode(SDL.SDL_BlendMode blendMode)
{
if (SDL.SDL_SetRenderDrawBlendMode(Renderer, blendMode) != 0)
{
throw new Exception("SDL_SetRenderDrawBlendMode()", new Exception(SDL.SDL_GetError()));
}
}
public void RenderCopyEx(IntPtr texture, SDL.SDL_Rect srcrect, SDL.SDL_Rect dstrect, double angle, SDL.SDL_Point center, SDL.SDL_RendererFlip flip)
{
if (SDL.SDL_RenderCopyEx(Renderer, texture, ref srcrect, ref dstrect, angle, ref center, flip) != 0)
{
throw new Exception("SDL_RenderCopyEx()", new Exception(SDL.SDL_GetError()));
}
}
/* IntPtr refers to a Mix_Chunk* */
/* This is an RWops macro in the C header. */
public static IntPtr Mix_LoadWAV(string file)
{
IntPtr rwops = SDL.SDL_RWFromFile(file, "rb");
return(Mix_LoadWAV_RW(rwops, 1));
}
public void RenderFillRects(SDL.SDL_Rect[] rects)
{
if (SDL.SDL_RenderFillRects(Renderer, rects, rects.Length) != 0)
{
throw new Exception("SDL_RenderFillRects()", new Exception(SDL.SDL_GetError()));
}
}
public BaseEventArgs(SDL.SDL_Event baseEvent)
{
BaseEvent = baseEvent;
}
public void RenderSetViewport(SDL.SDL_Rect rect)
{
if (SDL.SDL_RenderSetViewport(Renderer, ref rect) != 0)
{
throw new Exception("SDL_RenderSetViewport()", new Exception(SDL.SDL_GetError()));
}
}
//left to do: maximizing/minimizing
/// <summary>
/// Handles all window related SDL.SDL_events.
/// </summary>
internal static void WindowEvent(SDL.SDL_Event e)
{
switch (e.window.windowEvent)
{
case SDL.SDL_WindowEventID.SDL_WINDOWEVENT_SIZE_CHANGED:
_size = new Point(e.window.data1, e.window.data2);
break;
}
}
public TrafficLane(SDL.SDL_Point origin, SDL.SDL_Point endPoint, LaneDirection direction)
{
Origin = origin;
EndPoint = endPoint;
Direction = direction;
}
internal static void InputEvent(SDL.SDL_Event e)
{
switch (e.type)
{
case SDL.SDL_EventType.SDL_MOUSEBUTTONDOWN:
{
CurrentState.Add((Button)(1000 + e.button.button));
break;
}
case SDL.SDL_EventType.SDL_MOUSEBUTTONUP:
{
CurrentState.Remove((Button)(1000 + e.button.button));
break;
}
case SDL.SDL_EventType.SDL_MOUSEWHEEL:
{
if (e.wheel.y > 0)
CurrentState.Add(Button.MousewheelUp);
if (e.wheel.y < 0)
CurrentState.Add(Button.MousewheelDown);
if (e.wheel.x < 0)
CurrentState.Add(Button.MousewheelLeft);
if (e.wheel.x > 0)
CurrentState.Add(Button.MousewheelRight);
break;
}
case SDL.SDL_EventType.SDL_MOUSEMOTION:
{
UntranslatedMousePosition = new Point(e.motion.x, e.motion.y);
break;
}
case SDL.SDL_EventType.SDL_KEYDOWN:
{
if (e.key.repeat == 0) //we dont do repeats (yet?)
{
int sdlKeyDown = (int)e.key.keysym.sym;
if (sdlKeyDown < 65536)
CurrentState.Add((Button)(2000 + sdlKeyDown));
else
CurrentState.Add((Button)(sdlKeyDown - 1073739381));
}
//textinput special keys
switch (e.key.keysym.sym)
{
//backspace removes last character from all text input builders
case SDL.SDL_Keycode.SDLK_BACKSPACE:
TextInputReceivers.ForEach(builder =>
{
int length = builder.Length;
if (length > 0)
builder.Remove(length - 1, 1);
});
break;
case SDL.SDL_Keycode.SDLK_RETURN:
TextInputReceivers.ForEach(builder => builder.Append('\n'));
break;
case SDL.SDL_Keycode.SDLK_TAB:
TextInputReceivers.ForEach(builder => builder.Append('\t'));
break;
}
break;
}
case SDL.SDL_EventType.SDL_KEYUP:
{
int sdlKeyUp = (int)e.key.keysym.sym;
if (sdlKeyUp < 65536)
CurrentState.Remove((Button)(2000 + sdlKeyUp));
else
CurrentState.Remove((Button)(sdlKeyUp - 1073739381));
break;
}
case SDL.SDL_EventType.SDL_TEXTINPUT:
{
byte[] rawBytes = new byte[SDL.SDL_TEXTINPUTEVENT_TEXT_SIZE];
unsafe { Marshal.Copy((IntPtr)e.text.text, rawBytes, 0, SDL.SDL_TEXTINPUTEVENT_TEXT_SIZE); }
int length = Array.IndexOf<byte>(rawBytes, 0);
string text = Encoding.UTF8.GetString(rawBytes, 0, length);
//add text to all stringbuilders in TextInputReceivers
TextInputReceivers.ForEach(builder => builder.Append(text));
break;
}
case SDL.SDL_EventType.SDL_CONTROLLERDEVICEADDED:
{
//get first free gamepad slot
int newGamepadId = -1;
while (GamepadHandles[++newGamepadId] != IntPtr.Zero) { }
GamepadHandles[newGamepadId] = SDL.SDL_GameControllerOpen(e.cdevice.which);
IntPtr joystick = SDL.SDL_GameControllerGetJoystick(GamepadHandles[newGamepadId]);
GamepadInstanceIDs.Add(SDL.SDL_JoystickInstanceID(joystick), newGamepadId);
GamepadCurrentStates[newGamepadId] = new List<Button>();
GamepadPreviousStates[newGamepadId] = new List<Button>();
//init rumble if supported
if (SDL.SDL_JoystickIsHaptic(joystick) == 1)
{
IntPtr hapticHandle = SDL.SDL_HapticOpenFromJoystick(joystick);
if (SDL.SDL_HapticRumbleSupported(hapticHandle) == 1)
{
SDL.SDL_HapticRumbleInit(hapticHandle);
GamepadHapticHandles[newGamepadId] = hapticHandle;
}
else
SDL.SDL_HapticClose(hapticHandle);
}
break;
}
case SDL.SDL_EventType.SDL_CONTROLLERDEVICEREMOVED:
{
int gamepadId = GamepadInstanceIDs[e.cdevice.which];
SDL.SDL_GameControllerClose(GamepadHandles[gamepadId]);
GamepadHandles[gamepadId] = IntPtr.Zero;
GamepadInstanceIDs.Remove(e.cdevice.which);
if (GamepadHapticHandles[gamepadId] != IntPtr.Zero)
{
SDL.SDL_HapticClose(GamepadHapticHandles[gamepadId]);
GamepadHapticHandles[gamepadId] = IntPtr.Zero;
}
break;
}
case SDL.SDL_EventType.SDL_CONTROLLERBUTTONDOWN:
{
GamepadCurrentStates[GamepadInstanceIDs[e.cbutton.which]].Add((Button)(3000 + e.cbutton.button));
break;
}
case SDL.SDL_EventType.SDL_CONTROLLERBUTTONUP:
{
GamepadCurrentStates[GamepadInstanceIDs[e.cbutton.which]].Remove((Button)(3000 + e.cbutton.button));
break;
}
case SDL.SDL_EventType.SDL_CONTROLLERAXISMOTION:
{
int gamepad = GamepadInstanceIDs[e.caxis.which];
byte axis = e.caxis.axis;
float value = (float)e.caxis.axisValue / short.MaxValue;
GamepadAxisValues[gamepad, axis] = value;
if (value <= -GamepadDeadZone)
{
//add button if it's not added yet
Button button = (Button)(3015 + e.caxis.axis * 2);
if (!GamepadCurrentStates[gamepad].Contains(button))
GamepadCurrentStates[gamepad].Add(button);
}
else if (value >= GamepadDeadZone)
{
Button button = (Button)(3016 + e.caxis.axis * 2);
if (!GamepadCurrentStates[gamepad].Contains(button))
GamepadCurrentStates[gamepad].Add(button);
}
else
{
//remove both buttons for this axis if it's not in range
if (e.caxis.axis < 4)
GamepadCurrentStates[gamepad].Remove((Button)(3015 + e.caxis.axis * 2));
GamepadCurrentStates[gamepad].Remove((Button)(3016 + e.caxis.axis * 2));
}
break;
}
}
}
public TextEditingEventArgs(SDL.SDL_Event rawEvent)
: base(rawEvent)
{
RawTimeStamp = rawEvent.edit.timestamp;
}
public static string TTF_FontFaceStyleName(IntPtr font)
{
return(SDL.UTF8_ToManaged(
INTERNAL_TTF_FontFaceStyleName(font)
));
}