How to Display Text in Pygame

How to display text in pygame

All functions draw in buffer and you have to send buffer to VideoCard which will display to screen.

You need pygame.display.flip() or pygame.display.update() for this.

pygame + opengl = display text

Use glWindowPos instead of glRasterPos. While the coordinates of glRasterPos are transformed by the current modelview and projection matrices, glWindowPos directly updates the x and y coordinates of the current raster position.

See also PyGame and OpenGL immediate mode (Legacy OpenGL) - Text

Minimal example:

Sample Image

import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *

verticies = ((1, -1, -1), (1, 1, -1), (-1, 1, -1), (-1, -1, -1),
             (1, -1, 1), (1, 1, 1), (-1, -1, 1), (-1, 1, 1))
edges = ((0,1), (0,3), (0,4), (2,1),(2,3), (2,7), (6,3), (6,4),(6,7), (5,1), (5,4), (5,7))

def drawCube():
    global edges
    glBegin(GL_LINES)
    for edge in edges:
        for vertex in edge:
            glVertex3fv(verticies[vertex])
    glEnd()

def drawText(x, y, text):                                                
    textSurface = font.render(text, True, (255, 255, 66, 255), (0, 66, 0, 255))
    textData = pygame.image.tostring(textSurface, "RGBA", True)
    glWindowPos2d(x, y)
    glDrawPixels(textSurface.get_width(), textSurface.get_height(), GL_RGBA, GL_UNSIGNED_BYTE, textData)

pygame.init()
clock = pygame.time.Clock()

display = (400, 300)
pygame.display.set_mode(display, DOUBLEBUF | OPENGL)
font = pygame.font.SysFont('arial', 64)

gluPerspective(45, (display[0]/display[1]), 0.1, 50.0)
glTranslatef(0.0, 0.0, -5)
run = True
while run:
    clock.tick(100)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    glRotatef(1, 3, 1, 1)
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
    drawCube()
    drawText(140, 120, "cube")
    pygame.display.flip()

pygame.quit()
exit()

For text with a transparent background, you need to convert the text surface to a per pixel format using convert_alpha():

textSurface = font.render(text, True, (255, 255, 66, 255)).convert_alpha()

Additionally you have to enable Blending:

glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)

Minimal example:

Sample Image replit.com/@Rabbid76/pygame-opengl-text

Sample Image

import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *

verticies = ((1, -1, -1), (1, 1, -1), (-1, 1, -1), (-1, -1, -1),
             (1, -1, 1), (1, 1, 1), (-1, -1, 1), (-1, 1, 1))
edges = ((0,1), (0,3), (0,4), (2,1),(2,3), (2,7), (6,3), (6,4),(6,7), (5,1), (5,4), (5,7))

def drawCube():
    global edges
    glBegin(GL_LINES)
    for edge in edges:
        for vertex in edge:
            glVertex3fv(verticies[vertex])
    glEnd()

def drawText(x, y, text):                                                
    textSurface = font.render(text, True, (255, 255, 66, 255)).convert_alpha()
    textData = pygame.image.tostring(textSurface, "RGBA", True)
    glWindowPos2d(x, y)
    glDrawPixels(textSurface.get_width(), textSurface.get_height(), GL_RGBA, GL_UNSIGNED_BYTE, textData)

pygame.init()
clock = pygame.time.Clock()

display = (400, 300)
pygame.display.set_mode(display, DOUBLEBUF | OPENGL)
font = pygame.font.SysFont('arial', 64)

glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)

gluPerspective(45, (display[0]/display[1]), 0.1, 50.0)
glTranslatef(0.0, 0.0, -5)
run = True
while run:
    clock.tick(100)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
    glRotatef(1, 3, 1, 1)
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
    drawCube()
    drawText(140, 120, "cube")
    pygame.display.flip()

pygame.quit()
exit()

Make a Single Word Within a String Bold

No it is not possible. You must use the "bold" version of the font. "bold" isn't a flag or attribute, it's just a different font. So you need to render the word "Text" with one font and the word "Some" with another font.

You can use pygame.font.match_font() to find the path to a specific font file.

Minimal example:

Sample Image

import pygame

pygame.init()
window = pygame.display.set_mode((400, 200))
clock = pygame.time.Clock()

courer_regular = pygame.font.match_font("Courier", bold = False)
courer_bold = pygame.font.match_font("Courier", bold = True)

font = pygame.font.Font(courer_regular, 50)
font_b = pygame.font.Font(courer_bold, 50)
text1 = font.render("Some ", True, (255, 255, 255))
text2 = font_b.render("Text", True, (255, 255, 255))

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

    window.fill(0)
    window.blit(text1, (50, 75))
    window.blit(text2, (50 + text1.get_width(), 75))
    pygame.display.flip()
    clock.tick(60)

pygame.quit()
exit()

With the pygame.freetype modle the text can be rendered with different styles like STYLE_DEFAULT and STYLE_STRONG. However, the text can only be rendered with one style at a time. So you still have to render each word separately:

Sample Image

import pygame
import pygame.freetype

pygame.init()
window = pygame.display.set_mode((400, 200))
clock = pygame.time.Clock()

ft_font = pygame.freetype.SysFont('Courier', 50)
text1, rect1 = ft_font.render("Some ", 
    fgcolor = (255, 255, 255), style = pygame.freetype.STYLE_DEFAULT)
text2, rect2 = ft_font.render("Text", 
    fgcolor = (255, 255, 255), style = pygame.freetype.STYLE_STRONG)

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

    window.fill(0)
    window.blit(text1, (50, 75))
    window.blit(text2, (50 + rect1.width, 75))
    pygame.display.flip()
    clock.tick(60)

pygame.quit()
exit()

See also Text and font

Pygame pop up text

If you want to control something over time in Pygame you have two options:

  1. Use pygame.time.get_ticks() to measure time and implement logic that controls the visibility of the text depending on the time. pygame.time.get_ticks() returns the number of milliseconds since pygame.init(). Get the current time the text pops up and calculate the time the text must disappear:

    draw_text = true
    hide_text_time = pygame.time.get_ticks() + 1000 # 1 second
    if draw_text and pygame.time.get_ticks() > hide_text_time:
        draw_text = false

  2. Use the timer event. Use pygame.time.set_timer() to repeatedly create a USEREVENT in the event queue. The time has to be set in milliseconds. Start a timer event when the text pops up and hide the text when the event occurs:

    draw_text = true
    hide_text_event = pygame.USEREVENT + 1
    pygame.time.set_timer(hide_text_event, 1000, 1) # 1 second, one time
    # applicaition loop
    while True:

        # event loop
        for event in pygame.event.get():
            if event.type == hide_text_event:
                draw_text = False

For some complete examples, see the answers to the questions:

  • Adding a particle effect to my clicker game
  • Spawning multiple instances of the same object concurrently in python.

Minimal example (the pop up time can be controlled with the variable pop_up_seconds):

Sample Image

import pygame

pygame.init()
window = pygame.display.set_mode((400, 200))
font = pygame.font.SysFont(None, 40)
clock = pygame.time.Clock()

text = font.render("+1", True, (0, 255, 0))
text_pos_and_time = []
pop_up_seconds = 1

player = pygame.Rect(0, 80, 40, 40)
coins = [pygame.Rect(i*100+100, 80, 40, 40) for i in range(3)]

run = True
while run:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    keys = pygame.key.get_pressed()
    player.x = (player.x + (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * 3) % 300    

    current_time = pygame.time.get_ticks()
    for coin in coins[:]:
        if player.colliderect(coin):
            text_pos_and_time.append((coin.center, current_time + pop_up_seconds * 1000))
            coins.remove(coin)

    window.fill(0)    
    pygame.draw.rect(window, "red", player)
    for coin in coins:
        pygame.draw.circle(window, "yellow", coin.center, 20)
    for pos_time in text_pos_and_time[:]:
        if pos_time[1] > current_time:
            window.blit(text, text.get_rect(center = pos_time[0]))
        else:
            text_pos_and_time.remove(pos_time)    
    pygame.display.flip()

pygame.quit()
exit()

Writing text in pygame

http://www.daniweb.com/software-development/python/code/244474/pygame-text-python

Here's a link to an example... the code you're kinda looking for is this I think...

# pick a font you have and set its size
myfont = pg.font.SysFont("Comic Sans MS", 30)
# apply it to text on a label
label = myfont.render("Python and Pygame are Fun!", 1, yellow)
# put the label object on the screen at point x=100, y=100
screen.blit(label, (100, 100))

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