使用两个矩形和两个位图的每像素碰撞？

Question

我在这里找到了这段代码：Per-Pixel collision code

        /// <summary>
        /// Determines if there is overlap of the non-transparent pixels
        /// between two sprites.
        /// </summary>
        /// <param name="rectangleA">Bounding rectangle of the first sprite</param>
        /// <param name="dataA">Pixel data of the first sprite</param>
        /// <param name="rectangleB">Bouding rectangle of the second sprite</param>
        /// <param name="dataB">Pixel data of the second sprite</param>
        /// <returns>True if non-transparent pixels overlap; false otherwise</returns>
        static bool IntersectPixels(Rectangle rectangleA, Color[] dataA,
                                    Rectangle rectangleB, Color[] dataB) {
            // Find the bounds of the rectangle intersection
            int top = Math.Max(rectangleA.Top, rectangleB.Top);
            int bottom = Math.Min(rectangleA.Bottom, rectangleB.Bottom);
            int left = Math.Max(rectangleA.Left, rectangleB.Left);
            int right = Math.Min(rectangleA.Right, rectangleB.Right);

            // Check every point within the intersection bounds
            for (int y = top; y < bottom; y++) {
                for (int x = left; x < right; x++) {
                    // Get the color of both pixels at this point
                    Color colorA = dataA[(x - rectangleA.Left) +
                                         (y - rectangleA.Top) * rectangleA.Width];
                    Color colorB = dataB[(x - rectangleB.Left) +
                                         (y - rectangleB.Top) * rectangleB.Width];

                    // If both pixels are not completely transparent,
                    if (colorA.A != 0 && colorB.A != 0) {
                        // then an intersection has been found
                        return true;
                    }
                }
            }

            // No intersection found
            return false;
        }

但是，它接受从Texture2D对象中提取的像素数据数组。我没有在我的项目中使用XNA，只是普通的表单，所以我想知道如何将它转换为接受两个位图作为输入而不是两个像素数据数组。我自己尝试了一些方法，但是他们都失败了，而且我一直在超越界限。

感谢任何建议！

提前致谢！