kc3-lang/SDL/src/video/x11/SDL_x11shape.c

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• Hash : 3f1fd5ab
  Author :
  Date : 2023-05-23T10:59:03
  

  Updated source to match SDL function prototype style

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• src/video/x11/SDL_x11shape.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2023 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_X11
  
  #include "SDL_x11video.h"
  #include "SDL_x11shape.h"
  #include "SDL_x11window.h"
  #include "../SDL_shape_internals.h"
  
  SDL_WindowShaper *X11_CreateShaper(SDL_Window *window)
  {
      SDL_WindowShaper *result = NULL;
      SDL_ShapeData *data = NULL;
  
  #if SDL_VIDEO_DRIVER_X11_XSHAPE
      if (SDL_X11_HAVE_XSHAPE) { /* Make sure X server supports it. */
          result = SDL_malloc(sizeof(SDL_WindowShaper));
          if (result == NULL) {
              SDL_OutOfMemory();
              return NULL;
          }
          result->window = window;
          result->mode.mode = ShapeModeDefault;
          result->mode.parameters.binarizationCutoff = 1;
          result->userx = result->usery = 0;
          data = SDL_malloc(sizeof(SDL_ShapeData));
          if (data == NULL) {
              SDL_free(result);
              SDL_OutOfMemory();
              return NULL;
          }
          result->driverdata = data;
          data->bitmapsize = 0;
          data->bitmap = NULL;
          window->shaper = result;
          if (X11_ResizeWindowShape(window) != 0) {
              SDL_free(result);
              SDL_free(data);
              window->shaper = NULL;
              return NULL;
          }
      }
  #endif
  
      return result;
  }
  
  int X11_ResizeWindowShape(SDL_Window *window)
  {
      SDL_ShapeData *data = window->shaper->driverdata;
      unsigned int bitmapsize = window->w / 8;
      SDL_assert(data != NULL);
  
      if (window->w % 8 > 0) {
          bitmapsize += 1;
      }
      bitmapsize *= window->h;
      if (data->bitmapsize != bitmapsize || data->bitmap == NULL) {
          data->bitmapsize = bitmapsize;
          SDL_free(data->bitmap);
          data->bitmap = SDL_malloc(data->bitmapsize);
          if (data->bitmap == NULL) {
              return SDL_OutOfMemory();
          }
      }
      SDL_memset(data->bitmap, 0, data->bitmapsize);
  
      window->shaper->userx = window->x;
      window->shaper->usery = window->y;
      SDL_SetWindowPosition(window, -1000, -1000);
  
      return 0;
  }
  
  int X11_SetWindowShape(SDL_WindowShaper *shaper, SDL_Surface *shape, SDL_WindowShapeMode *shape_mode)
  {
      SDL_ShapeData *data = NULL;
      SDL_WindowData *windowdata = NULL;
      Pixmap shapemask;
  
      if (shaper == NULL || shape == NULL || shaper->driverdata == NULL) {
          return -1;
      }
  
  #if SDL_VIDEO_DRIVER_X11_XSHAPE
      if (shape->format->Amask == 0 && SDL_SHAPEMODEALPHA(shape_mode->mode)) {
          return -2;
      }
      if (shape->w != shaper->window->w || shape->h != shaper->window->h) {
          return -3;
      }
      data = shaper->driverdata;
  
      /* Assume that shaper->alphacutoff already has a value, because SDL_SetWindowShape() should have given it one. */
      SDL_CalculateShapeBitmap(shaper->mode, shape, data->bitmap, 8);
  
      windowdata = (SDL_WindowData *)(shaper->window->driverdata);
      shapemask = X11_XCreateBitmapFromData(windowdata->videodata->display, windowdata->xwindow, data->bitmap, shaper->window->w, shaper->window->h);
  
      X11_XShapeCombineMask(windowdata->videodata->display, windowdata->xwindow, ShapeBounding, 0, 0, shapemask, ShapeSet);
      X11_XSync(windowdata->videodata->display, False);
  
      X11_XFreePixmap(windowdata->videodata->display, shapemask);
  #endif
  
      return 0;
  }
  
  #endif /* SDL_VIDEO_DRIVER_X11 */
  

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