kc3-lang/SDL/src/video/raspberry/SDL_rpivideo.c

Branch : - branch - v2.28 - tag -

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  Commit

• Author : David Ludwig
  Date : 2014-04-09 21:29:19
  Hash : 3dcb451f
  Message : Added a README file regarding WinRT support To note, this file is currently formatted with CRLF line endings, rather than LF, to allow the file to be viewed with Notepad.

• src/video/raspberry/SDL_rpivideo.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2014 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"
  
  #if SDL_VIDEO_DRIVER_RPI
  
  /* References
   * http://elinux.org/RPi_VideoCore_APIs
   * https://github.com/raspberrypi/firmware/blob/master/opt/vc/src/hello_pi/hello_triangle/triangle.c
   * http://cgit.freedesktop.org/wayland/weston/tree/src/rpi-renderer.c
   * http://cgit.freedesktop.org/wayland/weston/tree/src/compositor-rpi.c
   */
  
  /* SDL internals */
  #include "../SDL_sysvideo.h"
  #include "SDL_version.h"
  #include "SDL_syswm.h"
  #include "SDL_loadso.h"
  #include "SDL_events.h"
  #include "../../events/SDL_mouse_c.h"
  #include "../../events/SDL_keyboard_c.h"
  
  #ifdef SDL_INPUT_LINUXEV
  #include "../../core/linux/SDL_evdev.h"
  #endif
  
  /* RPI declarations */
  #include "SDL_rpivideo.h"
  #include "SDL_rpievents_c.h"
  #include "SDL_rpiopengles.h"
  #include "SDL_rpimouse.h"
  
  static int
  RPI_Available(void)
  {
      return 1;
  }
  
  static void
  RPI_Destroy(SDL_VideoDevice * device)
  {
      /*    SDL_VideoData *phdata = (SDL_VideoData *) device->driverdata; */
  
      if (device->driverdata != NULL) {
          device->driverdata = NULL;
      }
  }
  
  static SDL_VideoDevice *
  RPI_Create()
  {
      SDL_VideoDevice *device;
      SDL_VideoData *phdata;
  
      /* Initialize SDL_VideoDevice structure */
      device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
      if (device == NULL) {
          SDL_OutOfMemory();
          return NULL;
      }
  
      /* Initialize internal data */
      phdata = (SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
      if (phdata == NULL) {
          SDL_OutOfMemory();
          SDL_free(device);
          return NULL;
      }
  
      device->driverdata = phdata;
  
      /* Setup amount of available displays and current display */
      device->num_displays = 0;
  
      /* Set device free function */
      device->free = RPI_Destroy;
  
      /* Setup all functions which we can handle */
      device->VideoInit = RPI_VideoInit;
      device->VideoQuit = RPI_VideoQuit;
      device->GetDisplayModes = RPI_GetDisplayModes;
      device->SetDisplayMode = RPI_SetDisplayMode;
      device->CreateWindow = RPI_CreateWindow;
      device->CreateWindowFrom = RPI_CreateWindowFrom;
      device->SetWindowTitle = RPI_SetWindowTitle;
      device->SetWindowIcon = RPI_SetWindowIcon;
      device->SetWindowPosition = RPI_SetWindowPosition;
      device->SetWindowSize = RPI_SetWindowSize;
      device->ShowWindow = RPI_ShowWindow;
      device->HideWindow = RPI_HideWindow;
      device->RaiseWindow = RPI_RaiseWindow;
      device->MaximizeWindow = RPI_MaximizeWindow;
      device->MinimizeWindow = RPI_MinimizeWindow;
      device->RestoreWindow = RPI_RestoreWindow;
      device->SetWindowGrab = RPI_SetWindowGrab;
      device->DestroyWindow = RPI_DestroyWindow;
      device->GetWindowWMInfo = RPI_GetWindowWMInfo;
      device->GL_LoadLibrary = RPI_GLES_LoadLibrary;
      device->GL_GetProcAddress = RPI_GLES_GetProcAddress;
      device->GL_UnloadLibrary = RPI_GLES_UnloadLibrary;
      device->GL_CreateContext = RPI_GLES_CreateContext;
      device->GL_MakeCurrent = RPI_GLES_MakeCurrent;
      device->GL_SetSwapInterval = RPI_GLES_SetSwapInterval;
      device->GL_GetSwapInterval = RPI_GLES_GetSwapInterval;
      device->GL_SwapWindow = RPI_GLES_SwapWindow;
      device->GL_DeleteContext = RPI_GLES_DeleteContext;
  
      device->PumpEvents = RPI_PumpEvents;
  
      return device;
  }
  
  VideoBootStrap RPI_bootstrap = {
      "RPI",
      "RPI Video Driver",
      RPI_Available,
      RPI_Create
  };
  
  /*****************************************************************************/
  /* SDL Video and Display initialization/handling functions                   */
  /*****************************************************************************/
  int
  RPI_VideoInit(_THIS)
  {
      SDL_VideoDisplay display;
      SDL_DisplayMode current_mode;
      SDL_DisplayData *data;
      uint32_t w,h;
  
      /* Initialize BCM Host */
      bcm_host_init();
  
      SDL_zero(current_mode);
  
      if (graphics_get_display_size( 0, &w, &h) < 0) {
          return -1;
      }
  
      current_mode.w = w;
      current_mode.h = h;
      /* FIXME: Is there a way to tell the actual refresh rate? */
      current_mode.refresh_rate = 60;
      /* 32 bpp for default */
      current_mode.format = SDL_PIXELFORMAT_ABGR8888;
  
      current_mode.driverdata = NULL;
  
      SDL_zero(display);
      display.desktop_mode = current_mode;
      display.current_mode = current_mode;
  
      /* Allocate display internal data */
      data = (SDL_DisplayData *) SDL_calloc(1, sizeof(SDL_DisplayData));
      if (data == NULL) {
          return SDL_OutOfMemory();
      }
  
      data->dispman_display = vc_dispmanx_display_open( 0 /* LCD */);
  
      display.driverdata = data;
  
      SDL_AddVideoDisplay(&display);
  
  #ifdef SDL_INPUT_LINUXEV    
      SDL_EVDEV_Init();
  #endif    
      
      RPI_InitMouse(_this);
  
      return 1;
  }
  
  void
  RPI_VideoQuit(_THIS)
  {
  #ifdef SDL_INPUT_LINUXEV    
      SDL_EVDEV_Quit();
  #endif    
  }
  
  void
  RPI_GetDisplayModes(_THIS, SDL_VideoDisplay * display)
  {
      /* Only one display mode available, the current one */
      SDL_AddDisplayMode(display, &display->current_mode);
  }
  
  int
  RPI_SetDisplayMode(_THIS, SDL_VideoDisplay * display, SDL_DisplayMode * mode)
  {
      return 0;
  }
  
  int
  RPI_CreateWindow(_THIS, SDL_Window * window)
  {
      SDL_WindowData *wdata;
      SDL_VideoDisplay *display;
      SDL_DisplayData *displaydata;
      VC_RECT_T dst_rect;
      VC_RECT_T src_rect;
      VC_DISPMANX_ALPHA_T         dispman_alpha;
      DISPMANX_UPDATE_HANDLE_T dispman_update;
  
      /* Disable alpha, otherwise the app looks composed with whatever dispman is showing (X11, console,etc) */
      dispman_alpha.flags = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS; 
      dispman_alpha.opacity = 0xFF; 
      dispman_alpha.mask = 0;
  
      /* Allocate window internal data */
      wdata = (SDL_WindowData *) SDL_calloc(1, sizeof(SDL_WindowData));
      if (wdata == NULL) {
          return SDL_OutOfMemory();
      }
      display = SDL_GetDisplayForWindow(window);
      displaydata = (SDL_DisplayData *) display->driverdata;
  
      /* Windows have one size for now */
      window->w = display->desktop_mode.w;
      window->h = display->desktop_mode.h;
  
      /* OpenGL ES is the law here, buddy */
      window->flags |= SDL_WINDOW_OPENGL;
  
      /* Create a dispman element and associate a window to it */
      dst_rect.x = 0;
      dst_rect.y = 0;
      dst_rect.width = window->w;
      dst_rect.height = window->h;
  
      src_rect.x = 0;
      src_rect.y = 0;
      src_rect.width = window->w << 16;
      src_rect.height = window->h << 16;
  
      dispman_update = vc_dispmanx_update_start( 0 );
      wdata->dispman_window.element = vc_dispmanx_element_add ( dispman_update, displaydata->dispman_display, SDL_RPI_VIDEOLAYER /* layer */, &dst_rect, 0/*src*/, &src_rect, DISPMANX_PROTECTION_NONE, &dispman_alpha /*alpha*/, 0/*clamp*/, 0/*transform*/);
      wdata->dispman_window.width = window->w;
      wdata->dispman_window.height = window->h;
      vc_dispmanx_update_submit_sync( dispman_update );
      
      if (!_this->egl_data) {
          if (SDL_GL_LoadLibrary(NULL) < 0) {
              return -1;
          }
      }
      wdata->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType) &wdata->dispman_window);
  
      if (wdata->egl_surface == EGL_NO_SURFACE) {
          return SDL_SetError("Could not create GLES window surface");
      }
  
      /* Setup driver data for this window */
      window->driverdata = wdata;
      
      /* One window, it always has focus */
      SDL_SetMouseFocus(window);
      SDL_SetKeyboardFocus(window);
  
      /* Window has been successfully created */
      return 0;
  }
  
  void
  RPI_DestroyWindow(_THIS, SDL_Window * window)
  {
      SDL_WindowData *data;
          
      if(window->driverdata) {
          data = (SDL_WindowData *) window->driverdata;
          if (data->egl_surface != EGL_NO_SURFACE) {
              SDL_EGL_DestroySurface(_this, data->egl_surface);
              data->egl_surface = EGL_NO_SURFACE;
          }
          SDL_free(window->driverdata);
          window->driverdata = NULL;
      }
  }
  
  int
  RPI_CreateWindowFrom(_THIS, SDL_Window * window, const void *data)
  {
      return -1;
  }
  
  void
  RPI_SetWindowTitle(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_SetWindowIcon(_THIS, SDL_Window * window, SDL_Surface * icon)
  {
  }
  void
  RPI_SetWindowPosition(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_SetWindowSize(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_ShowWindow(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_HideWindow(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_RaiseWindow(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_MaximizeWindow(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_MinimizeWindow(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_RestoreWindow(_THIS, SDL_Window * window)
  {
  }
  void
  RPI_SetWindowGrab(_THIS, SDL_Window * window, SDL_bool grabbed)
  {
  
  }
  
  /*****************************************************************************/
  /* SDL Window Manager function                                               */
  /*****************************************************************************/
  SDL_bool
  RPI_GetWindowWMInfo(_THIS, SDL_Window * window, struct SDL_SysWMinfo *info)
  {
      if (info->version.major <= SDL_MAJOR_VERSION) {
          return SDL_TRUE;
      } else {
          SDL_SetError("application not compiled with SDL %d.%d\n",
                       SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
          return SDL_FALSE;
      }
  
      /* Failed to get window manager information */
      return SDL_FALSE;
  }
  
  #endif /* SDL_VIDEO_DRIVER_RPI */
  
  /* vi: set ts=4 sw=4 expandtab: */