drawTexture method

void drawTexture(Canvas canvas, Offset position, Paint paint)

Draws the texture to a Canvas at a specified position and with the specified paint.

Implementation

void drawTexture(Canvas canvas, Offset position, Paint paint) {
  // Get drawing position
  double x = position.dx;
  double y = position.dy;

  // Draw the texture
  if (rotated) {
    // Account for position
    bool translate = (x != 0 || y != 0);
    if (translate) {
      canvas.translate(x, y);
    }

    // Calculate the rotated frame and spriteSourceSize
    Size originalFrameSize = frame.size;
    Rect rotatedFrame = frame.topLeft &
        Size(originalFrameSize.height, originalFrameSize.width);
    Offset rotatedSpriteSourcePoint = Offset(
        -spriteSourceSize.top -
            (spriteSourceSize.bottom - spriteSourceSize.top),
        spriteSourceSize.left);
    Rect rotatedSpriteSourceSize = rotatedSpriteSourcePoint &
        Size(originalFrameSize.height, originalFrameSize.width);

    // Draw the rotated sprite
    canvas.rotate(-math.pi / 2.0);
    canvas.drawImageRect(image, rotatedFrame, rotatedSpriteSourceSize, paint);
    canvas.rotate(math.pi / 2.0);

    // Translate back
    if (translate) {
      canvas.translate(-x, -y);
    }
  } else {
    // Draw the sprite
    Rect dstRect = Rect.fromLTWH(
        x + spriteSourceSize.left,
        y + spriteSourceSize.top,
        spriteSourceSize.width,
        spriteSourceSize.height);
    canvas.drawImageRect(image, frame, dstRect, paint);
  }
}