绘制线条
例程简介
本节我们介绍绘制线条的draw_line()方法
API 文档
draw_line 函数可实现在图像上绘制一条线。
- 语法
image.draw_line(x0, y0, x1, y1, color)
参数解释
x0, y0：起点坐标。x1, y1：终点坐标。color：线的颜色。
示例
xxxxxxxxxximg.draw_line(10, 10, 100, 100, color=(255, 0, 0)) # 绘制红色线
示例代码
我们使用Draw_line方法，绘制一个Yahboom的LOGO
x# Import required modules# 导入所需的模块import time, os, urandom, sys# Import display and media related modules# 导入显示和媒体相关模块from media.display import *from media.media import *# Define display resolution constants# 定义显示分辨率常量DISPLAY_WIDTH = 640DISPLAY_HEIGHT = 480def display_test(): """ Function to test display functionality 测试显示功能的函数 """ # Create main background image with white color # 创建白色背景的主图像 img = image.Image(DISPLAY_WIDTH, DISPLAY_HEIGHT, image.ARGB8888) img.clear() img.draw_rectangle(0, 0, DISPLAY_WIDTH, DISPLAY_HEIGHT,color=(255,255,255),fill=True) # Initialize display with ST7701 driver # 使用ST7701驱动初始化显示器 Display.init(Display.ST7701, width = DISPLAY_WIDTH, height = DISPLAY_HEIGHT, to_ide = True) # Initialize media manager # 初始化媒体管理器 MediaManager.init() try: # Draw "Yahboom" string # 绘制"Yahboom"字符串 # Y字母 # 设置屏幕宽度变量 screen_width = 640 # 设置文字粗细和颜色 thickness = 5 text_color = (0, 191, 255) # 计算文本的总宽度 text_width = 200 # 计算文本起始位置，使其居中 start_x = (screen_width - text_width) // 2 # Y字母 img.draw_line(start_x, 220, start_x + 20, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 20, 240, start_x + 40, 220, color=text_color, thickness=thickness) img.draw_line(start_x + 20, 240, start_x + 20, 260, color=text_color, thickness=thickness) # a字母 img.draw_line(start_x + 45, 240, start_x + 65, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 65, 240, start_x + 65, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 70, 260, start_x + 45, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 45, 260, start_x + 45, 240, color=text_color, thickness=thickness)# img.draw_line(start_x + 50, 260, start_x + 50, 240, color=text_color, thickness=thickness) # h字母 img.draw_line(start_x + 80, 220, start_x + 80, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 80, 240, start_x + 100, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 100, 240, start_x + 100, 260, color=text_color, thickness=thickness) # b字母 img.draw_line(start_x + 110, 220, start_x + 110, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 110, 240, start_x + 130, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 130, 240, start_x + 130, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 130, 260, start_x + 110, 260, color=text_color, thickness=thickness) # o字母 img.draw_line(start_x + 140, 240, start_x + 160, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 160, 240, start_x + 160, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 160, 260, start_x + 140, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 140, 260, start_x + 140, 240, color=text_color, thickness=thickness) # o字母 img.draw_line(start_x + 170, 240, start_x + 190, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 190, 240, start_x + 190, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 190, 260, start_x + 170, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 170, 260, start_x + 170, 240, color=text_color, thickness=thickness) # m字母 img.draw_line(start_x + 200, 240, start_x + 200, 260, color=text_color, thickness=thickness) img.draw_line(start_x + 200, 240, start_x + 210, 250, color=text_color, thickness=thickness) img.draw_line(start_x + 210, 250, start_x + 220, 240, color=text_color, thickness=thickness) img.draw_line(start_x + 220, 240, start_x + 220, 260, color=text_color, thickness=thickness) # Update display with background image # 更新显示背景图像 Display.show_image(img) while True: time.sleep(2) except KeyboardInterrupt as e: print("user stop: ", e) except BaseException as e: print(f"Exception {e}") # Cleanup and deinitialize display # 清理并反初始化显示器 Display.deinit() os.exitpoint(os.EXITPOINT_ENABLE_SLEEP) time.sleep_ms(100) # Release media resources # 释放媒体资源 MediaManager.deinit()if __name__ == "__main__": # Enable exit points and run display test # 启用退出点并运行显示测试 os.exitpoint(os.EXITPOINT_ENABLE) display_test()
例程运行效果
可以看到，我们在屏幕的中心用直线绘制了一个“Yahboom”的字符串
