Dungeon Master Forum

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  textureRect.x = 0; 
  textureRect.y = 0; 
  textureRect.w = width;
  textureRect.h = height;

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  textureRect.x = dstX; 
  textureRect.y = dstY;
  textureRect.w = width;
  textureRect.h = height; 

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  rendererRect.x = dstX;
  rendererRect.y = dstY;
  rendererRect.w = width;
  rendererRect.h = height;
  SDL_RenderCopy(sdlRenderer,
                 sdlTexture,
                 &textureRect,
                 &rendererRect);

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sourceRect.x = 0;
sourceRect.y = 0;
sourceRect.w = 320;
sourceRect.h = 200;

destinationRect.x = 0;
destinationRect.y = 0;
destinationRect.w = 1360;
destinationRect.h = 768;

SDL_RenderCopy(sdlRenderer,
                 sdlTexture,
                 &sourceRect,
                 &destinationRect);

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  SDL_RenderCopy(sdlRenderer,
                 sdlTexture,
                 NULL,
                 NULL);

Code: Select all

void UI_SetDIBitsToDevice(
                           int dstX,
                           int dstY,
                           int width,
                           int height,
                           int,
                           int,
                           int,
                           int,
                           char *bitmap,
                           void *,
                           int
                         )
{
  /* textureRect is for sdlTexture partial updating ONLY.
   * dstX and dstY are the coordinates on which the partial update rect start on sdlTexture,
   * so they must be used on textureRect accordingly.
   * bitmap pixels are 2bytes each. */

  SDL_Rect textureRect;
  SDL_Rect rendererRect;
  void *dstPixels;
  int pitch;
  int line;
  if (sdlTexture == NULL) return;
  textureRect.x = dstX;
  textureRect.y = dstY;
  textureRect.w = width;
  textureRect.h = height;
  if (SDL_LockTexture(sdlTexture,
                      &textureRect,
                      &dstPixels,
                      &pitch))
  {
    UI_MessageBox(SDL_GetError(),
                  "UI_SetDIBitsToDevice",
                  MESSAGE_OK);
    die(0x53a9);
  };

  for (line=0; line<height; line++)
  {
    memcpy((ui8 *)dstPixels+pitch*line,
           bitmap+2*320*(line), width*2);
  };
  SDL_UnlockTexture(sdlTexture);
  SDL_RenderClear(sdlRenderer);
  SDL_RenderCopy(sdlRenderer,
                 sdlTexture,
  		 NULL,
		 NULL);
  SDL_RenderPresent(sdlRenderer);
  return;
}