如何在字体上绘制轮廓?
我想使用黑色字体,但背景必须是黑色的,所以很难看清字体。
我假设 myfont.render
不支持在字体上绘制轮廓。
还有其他办法吗?
最佳答案
Pygame 不支持开箱即用,但一种方法是以轮廓颜色渲染文本,并将其 blit 到多次移动的结果表面,然后在顶部以所需的颜色渲染文本它。
pgzero使用这种技术;其代码的精简版本如下所示:
import pygame
_circle_cache = {}
def _circlepoints(r):
r = int(round(r))
if r in _circle_cache:
return _circle_cache[r]
x, y, e = r, 0, 1 - r
_circle_cache[r] = points = []
while x >= y:
points.append((x, y))
y += 1
if e < 0:
e += 2 * y - 1
else:
x -= 1
e += 2 * (y - x) - 1
points += [(y, x) for x, y in points if x > y]
points += [(-x, y) for x, y in points if x]
points += [(x, -y) for x, y in points if y]
points.sort()
return points
def render(text, font, gfcolor=pygame.Color('dodgerblue'), ocolor=(255, 255, 255), opx=2):
textsurface = font.render(text, True, gfcolor).convert_alpha()
w = textsurface.get_width() + 2 * opx
h = font.get_height()
osurf = pygame.Surface((w, h + 2 * opx)).convert_alpha()
osurf.fill((0, 0, 0, 0))
surf = osurf.copy()
osurf.blit(font.render(text, True, ocolor).convert_alpha(), (0, 0))
for dx, dy in _circlepoints(opx):
surf.blit(osurf, (dx + opx, dy + opx))
surf.blit(textsurface, (opx, opx))
return surf
def main():
pygame.init()
font = pygame.font.SysFont(None, 64)
screen = pygame.display.set_mode((350, 100))
clock = pygame.time.Clock()
while True:
events = pygame.event.get()
for e in events:
if e.type == pygame.QUIT:
return
screen.fill((30, 30, 30))
screen.blit(render('Hello World', font), (20, 20))
pygame.display.update()
clock.tick(60)
if __name__ == '__main__':
main()
关于python - 如何在字体上绘制轮廓(Pygame),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54363047/