kc3-lang/SDL/src/video/n3ds/SDL_n3dstouch.c

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• Hash : 266014fa
  Author :
  Date : 2022-09-18T13:38:26
  

  N3DS: Use SDL_Touch instead of the Joystick touch.

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• src/video/n3ds/SDL_n3dstouch.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  
  #include "../../SDL_internal.h"
  
  #ifdef SDL_VIDEO_DRIVER_N3DS
  
  #include <3ds.h>
  
  #include "../../events/SDL_touch_c.h"
  #include "SDL_n3dstouch.h"
  
  #define N3DS_TOUCH_ID 0
  
  /*
    Factors used to convert touchscreen coordinates to
    SDL's 0-1 values. Note that the N3DS's screen is
    internally in a portrait disposition so the
    GSP_SCREEN constants are flipped.
  */
  #define TOUCHSCREEN_SCALE_X 1.0f / GSP_SCREEN_HEIGHT_BOTTOM
  #define TOUCHSCREEN_SCALE_Y 1.0f / GSP_SCREEN_WIDTH
  
  void
  N3DS_InitTouch(void)
  {
      SDL_AddTouch(N3DS_TOUCH_ID, SDL_TOUCH_DEVICE_DIRECT, "Touchscreen");
  }
  
  void
  N3DS_QuitTouch(void)
  {
      SDL_DelTouch(N3DS_TOUCH_ID);
  }
  
  void
  N3DS_PollTouch(void)
  {
      touchPosition touch;
      static SDL_bool was_pressed = SDL_FALSE;
      SDL_bool pressed;
      hidTouchRead(&touch);
      pressed = (touch.px != 0 || touch.py != 0);
  
      if (pressed != was_pressed) {
          was_pressed = pressed;
          SDL_SendTouch(N3DS_TOUCH_ID,
                        0,
                        NULL,
                        pressed,
                        touch.px * TOUCHSCREEN_SCALE_X,
                        touch.py * TOUCHSCREEN_SCALE_Y,
                        pressed ? 1.0f : 0.0f);
      } else if (pressed) {
          SDL_SendTouchMotion(N3DS_TOUCH_ID,
                              0,
                              NULL,
                              touch.px * TOUCHSCREEN_SCALE_X,
                              touch.py * TOUCHSCREEN_SCALE_Y,
                              1.0f);
      }
  }
  
  #endif /* SDL_VIDEO_DRIVER_N3DS */
  
  /* vi: set sts=4 ts=4 sw=4 expandtab: */
  

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