Pygame Python font

Question

I have a question regarding the glyph a font and the pygame width of a font yesterday i some code regarding this here is the code:

import pygame

pygame.init()
win = pygame.display.set_mode((800, 600))
font = pygame.font.Font("freesansbold.ttf", 32)
i = 0
text = "hello how are you?"
run = True
while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    letter = text[i]
    text_1 = font.render(letter, True, (255, 255, 255))

    bw, bh = font.size(letter)
    glyph_rect = pygame.mask.from_surface(text_1).get_bounding_rects()
    # print(glyph_rect)
    if glyph_rect:
        gh = glyph_rect[0].height
        print(f"{glyph_rect[0]}")
        print(f'letter {letter}  bitmap height: {bh}  glyph height: {gh} width = {glyph_rect[0].width} width_2 = {bw}')

    win.fill((0, 0, 0))
    win.blit(text_1, (0, 0))
    pygame.display.update()

    i += 1
    run = i < len(text)

pygame.quit()
# win.blit(text_1, (0, 0))

I know why the glyph height is diffrent because i asked that in a question and i got a answer for that but why is the glyph width always a bit less than the actual width? Can someone explain me in detail

Rabbid76 · Accepted Answer · 2021-05-14 07:58:45Z

2

The width is different because there is a space between characters when they are connected to words. glyph_rect[0].width is the width of the glyph. bw is the width of the bitmap. The glyph does not fill the entire bitmap and has some space on both sides.

You can investigate this with the following program (each letter is displayed for 1 second):

import pygame

pygame.init()
win = pygame.display.set_mode((800, 600))
clock = pygame.time.Clock()
font = pygame.font.Font("freesansbold.ttf", 200)
i = 0
text = "hello how are you?"
run = True
while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    letter = text[i]
    text_1 = font.render(letter, True, (0, 0, 0))
    text_draw = font.render(letter, True, (0, 0, 0), (255, 255, 255))

    bw, bh = font.size(letter)
    glyph_rect = pygame.mask.from_surface(text_1).get_bounding_rects()
    if glyph_rect:
        gh = glyph_rect[0].height
        print(f"{glyph_rect[0]}")
        print(f'letter {letter}  bitmap height: {bh}  glyph height: {gh} width = {glyph_rect[0].width} width_2 = {bw}')

    win.fill((128, 128, 128))
    win.blit(text_draw, (100, 100))
    for r in glyph_rect:
        draw_rect = r.move(100, 100)
        pygame.draw.rect(win, (255, 0, 0), draw_rect, 3)
    pygame.display.update()

    i += 1
    run = i < len(text)
    clock.tick(1)

pygame.quit()

edited May 14, 2021 at 7:58

answered May 14, 2021 at 7:22

Rabbid76

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6 Comments

Arkodeep Ray Over a year ago

Thank you so much for explaining me biitmap font and bitmap and glyphs and many other things.

Arkodeep Ray Over a year ago

so the charecter " " has no connecting pixels with it as it is the background so i will get an empty list as glyph_rect

Arkodeep Ray Over a year ago

so the charecter " " has no connecting pixels with it as it is the background so i will get an empty list as glyph_rect

Rabbid76 Over a year ago

@Rohit12345 Yes, for " " the list is empty. For "?" the list has 2 elements.

Arkodeep Ray Over a year ago

ok ya it has two elements because there is a space between the . in the question mark right

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