BCB下用Canvas画直线、圆，椭圆，不规则多边形-Canvas painting BCB using a straight line, round, oval, irregular polygon, etc.

图像 处理 opengl 方程法画椭圆 cpp源代码 有注解-Image processing opengl equation method the painted oval cpp source code annotated

本程序是对一幅图像进行变灰度,旋转,锐化,在图像上画圆或椭圆-This procedure is to become an image gray scale, rotation, sharpening, round or oval in the picture on the image

练习使用GDI函数绘出基本几何元素，如点、线、矩形、圆、椭圆、多边形、圆弧等、并能够用颜色填充；练习使用GDI函数显示图像；-Practice using GDI functions to draw basic geometry elements such as points, lines, rectangles, circles, ellipses, polygons, arcs, etc., and can be filled with colors practice using GDI