rectangleRgba function

bool rectangleRgba(Pointer<SdlRenderer> renderer, double x1, double y1, double x2, double y2, int r, int g, int b, int a, { int blendMode = SDL_BLENDMODE_BLEND, })

Implementation

bool rectangleRgba(
  Pointer<SdlRenderer> renderer,
  double x1,
  double y1,
  double x2,
  double y2,
  int r,
  int g,
  int b,
  int a, {
  int blendMode = SDL_BLENDMODE_BLEND,
}) {
  var x10 = x1;
  var y10 = y1;
  var x20 = x2;
  var y20 = y2;
  var result = true;
  double tmp;

  /*
	* Test for special cases of straight lines or single point
	*/
  if (x10 == x20) {
    if (y10 == y20) {
      return pixelRgba(renderer, x10, y10, r, g, b, a, blendMode: blendMode);
    } else {
      return vlineRgba(
        renderer,
        x10,
        y10,
        y20,
        r,
        g,
        b,
        a,
        blendMode: blendMode,
      );
    }
  } else {
    if (y10 == y20) {
      return hlineRgba(
        renderer,
        x10,
        x20,
        y10,
        r,
        g,
        b,
        a,
        blendMode: blendMode,
      );
    }
  }

  /*
	* Swap x10, x20 if required
	*/
  if (x10 > x20) {
    tmp = x10;
    x10 = x20;
    x20 = tmp;
  }

  /*
	* Swap y10, y20 if required
	*/
  if (y10 > y20) {
    tmp = y10;
    y10 = y20;
    y20 = tmp;
  }

  /*
	* Create destination rect
	*/
  final rect = calloc<SdlFRect>();
  rect.ref.x = x10;
  rect.ref.y = y10;
  rect.ref.w = x20 - x10;
  rect.ref.h = y20 - y10;

  /*
	* Draw
	*/
  result = true;
  if (result) {
    result = sdlSetRenderDrawBlendMode(renderer, blendMode);
  }
  if (result) {
    result = sdlSetRenderDrawColor(renderer, r, g, b, a);
  }
  if (result) {
    result = sdlRenderRect(renderer, rect);
  }
  calloc.free(rect);
  return result;
}