x11 color-drawing

本文主要是介绍x11 color-drawing，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

彩色绘画

1. 获取屏幕颜色空间

     screen_colormap = DefaultColormap(display, DefaultScreen(display));
   

2. 通过颜色名分配颜色结构体

     rc = XAllocNamedColor(display, screen_colormap, "red", &red, &red);if (rc == 0) {fprintf(stderr, "XAllocNamedColor - failed to allocated 'red' color.\n");exit(1);}
   

3. 四个角落各画了一个小红点

     XSetForeground(display, gc, red.pixel);XDrawPoint(display, win, gc, 5, 5);XDrawPoint(display, win, gc, 5, height-5);XDrawPoint(display, win, gc, width-5, 5);XDrawPoint(display, win, gc, width-5, height-5);
   

4. 两条棕色的线条

     XSetForeground(display, gc, brown.pixel);XDrawLine(display, win, gc, 50, 0, 50, 200);XDrawLine(display, win, gc, 0, 100, 200, 100);
   

5. 花了一个蓝色的圆

     XSetForeground(display, gc, blue.pixel);XDrawArc(display, win, gc, 50-(30/2), 100-(30/2), 30, 30, 0, 360*64);
   

6. 通过相邻点画黄色的线条组

       XSetForeground(display, gc, yellow.pixel);XDrawLines(display, win, gc, points, npoints, CoordModeOrigin);
   

7. 画一个矩形

     XSetForeground(display, gc, BlackPixel(display, screen_num));XDrawRectangle(display, win, gc, 120, 150, 50, 60);
   

8. 画一个填充的矩形

     XSetForeground(display, gc, green.pixel);XFillRectangle(display, win, gc, 60, 150, 50, 60);
   

这篇关于x11 color-drawing的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---