Ejemplo n.º 1
0
        /// <summary>
        /// 填充矩形
        /// </summary>
        /// <param name="color">颜色</param>
        /// <param name="left">左坐标</param>
        /// <param name="top">上坐标</param>
        /// <param name="width">填充的宽度</param>
        /// <param name="height">填充的高度</param>
        public override void FillRectangle(int color, int left, int top, int width, int height)
        {
            ImageBuilderUtil.ColorToArgb(color, out var a, out var r, out var g, out var b);

            for (int v = 0; v < height; v++)    //控制行
            {
                for (int h = 0; h < width; h++) //控制当前行的位置
                {
                    var tempX = left + h;
                    var tempY = top + v;
                    if (tempX < 0 || tempX > Width || tempY < 0 || tempY > Height)
                    {
                        continue;
                    }
                    var index = (Width * (v + top) + (h + left)) * 4;
                    Data[index]     = b;
                    Data[index + 1] = g;
                    Data[index + 2] = r;
                    Data[index + 3] = a;
                }
            }
        }
Ejemplo n.º 2
0
        /// <summary>
        /// 绘制线段
        /// </summary>
        /// <param name="color"></param>
        /// <param name="x1">起始x坐标</param>
        /// <param name="y1">起始y坐标</param>
        /// <param name="x2">终止x坐标</param>
        /// <param name="y2">终止y坐标</param>
        public override void DrawLine(int color, int x1, int y1, int x2, int y2)
        {
            ImageBuilderUtil.ColorToArgb(color, out var a, out var r, out var g, out var b);
            int index = 0;

            if (x1 != x2 && y1 != y2)
            {
                //TODO 未全面测试斜线绘制

                //ColorToArgb(-65536, out a, out r, out g, out b);
                int drawX    = x1;
                int drawY    = y1;
                int drawEndX = x2;
                int drawEndY = y2;

                //横向偏移量
                float hoffset = 0;
                //纵向偏移量
                float voffset = 0;

                var hlength     = drawX - drawEndX;
                var vlength     = drawY - drawEndY;
                int step        = 0;
                var hlength_abs = Math.Abs(hlength);
                var vlength_abs = Math.Abs(vlength);

                if (hlength_abs == vlength_abs) //斜线
                {
                    hoffset = hlength > 0 ? -1 : 1;
                    voffset = vlength > 0 ? -1 : 1;
                    step    = hlength_abs;
                }
                else if (hlength_abs > vlength_abs)    //横向位移较大
                {
                    hoffset = hlength > 0 ? -1 : 1;
                    voffset = vlength > 0 ? -vlength / hlength_abs : vlength / hlength_abs;
                    step    = hlength_abs;
                }
                else    //纵向位移较大
                {
                    hoffset = hlength > 0 ? -hlength / vlength_abs : hlength / vlength_abs;
                    voffset = vlength > 0 ? -1 : 1;
                    step    = vlength_abs;
                }

                //System.Diagnostics.Debug.WriteLine($"x1:{x1},y1:{y1}, x2:{x2}, y2:{y2},step:{step}");
                for (; step > 0; drawX = (int)(drawX + hoffset), drawY = (int)(drawY + voffset), step--)
                {
                    index = (Width * drawY + drawX) * 4;
                    //System.Diagnostics.Debug.WriteLine($"step:{step},x:{drawX},y:{drawY},index:{index}");
                    if (index < 0)
                    {
                        continue;
                    }
                    else if (index > Data.Length)
                    {
                        continue;
                    }
                    Data[index]     = b;
                    Data[index + 1] = g;
                    Data[index + 2] = r;
                    Data[index + 3] = a;
                }
            }
            else
            {
                //TODO 可能需要处理两个边界值问题。
                if (x1 == x2)
                {
                    var drawY    = Math.Min(y1, y2);
                    var drawEndY = Math.Max(y1, y2);
                    for (; drawY < drawEndY; drawY++)
                    {
                        index           = (drawY * Width + x1) * 4;
                        Data[index]     = b;
                        Data[index + 1] = g;
                        Data[index + 2] = r;
                        Data[index + 3] = a;
                    }
                }
                else if (y1 == y2)
                {
                    var drawX    = Math.Min(x1, x2);
                    var drawEndX = Math.Max(x1, x2);
                    for (; drawX < drawEndX; drawX++)
                    {
                        index           = (y1 * Width + drawX) * 4;
                        Data[index]     = b;
                        Data[index + 1] = g;
                        Data[index + 2] = r;
                        Data[index + 3] = a;
                    }
                }
            }
        }