如何使用pygame保存带有轮廓文本的图像？

问题描述

以下代码正在保存此 image。

import pygame

pygame.init()

font = pygame.font.SysFont('arialroundedbold.ttf',60)
text = font.render("hello world",True,(0,0),(255,255,255))

pygame.image.save(text,"hello_world.png")

如何在文本 "hello world" 周围添加具有特定粗体（假设为 3 分）的红色轮廓并保存？

解决方法

如果要在字母周围绘制轮廓，请参阅 Have an outline of text in Pygame。

import pygame

pygame.init()
window = pygame.display.set_mode((400,400))

def render_text_outline(font,text,color,background,outline,outlinecolor):
    outlineSurf = font.render(text,True,outlinecolor)
    outlineSize = outlineSurf.get_size()
    textSurf = pygame.Surface((outlineSize[0] + outline*2,outlineSize[1] + 2*outline))
    textSurf.fill(background)
    textRect = textSurf.get_rect()
    offsets = [(ox,oy) 
        for ox in range(-outline,2*outline,outline)
        for oy in range(-outline,outline)
        if ox != 0 or ox != 0]
    for ox,oy in offsets:   
        px,py = textRect.center
        textSurf.blit(outlineSurf,outlineSurf.get_rect(center = (px+ox,py+oy))) 
    innerText = font.render(text,color).convert_alpha()
    textSurf.blit(innerText,innerText.get_rect(center = textRect.center)) 
    return textSurf

font = pygame.font.SysFont('arialroundedbold.ttf',60)
text_outline = render_text_outline(
    font,"hello world",(0,0),(255,255,255),3,0))

# save to file
pygame.image.save(text_outline,"hello_world.png")

run = True
while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    window.fill((127,127,127))
    window.blit(text_outline,text_outline.get_rect(center = window.get_rect().center))
    pygame.display.flip()

pygame.quit()
exit()

---

如果要在文本框周围绘制轮廓，请定义轮廓的宽度和颜色：

width = 3
outline_color = "red"

创建一个 pygame.Surface，其宽度和高度是文本的外线厚度的两倍Surface：

outline_w = text.get_width() + width*2
outline_h = text.get_height() + width*2
text_outline = pygame.Surface((outline_w,outline_h))

用轮廓的颜色填充新的Surface：

text_outline.fill(outline_color)

将文本 Surface 放在新 Surface 的中间：

text_outline.blit(text,text.get_rect(center = text_outline.get_rect().center))

---

最小示例：

import pygame

pygame.init()
window = pygame.display.set_mode((400,400))

font = pygame.font.SysFont('arialroundedbold.ttf',60)
text = font.render("hello world",255))

width = 3
outline_color = "red"
outline_w = text.get_width() + width*2
outline_h = text.get_height() + width*2
text_outline = pygame.Surface((outline_w,outline_h))
text_outline.fill(outline_color)
text_outline.blit(text,text.get_rect(center = text_outline.get_rect().center))

# save to file
pygame.image.save(text_outline,text_outline.get_rect(center = window.get_rect().center))
    pygame.display.flip()

pygame.quit()
exit()