我围绕Pygame构建了我的整个游戏,并希望将其放在Steam上。最后,我了解到我需要OpenGL支持才能运行Steam的Overlay。初始化显示的代码:
screen = pygame.display.set_mode((screen_width, screen_height), HWSURFACE | DOUBLEBUF | OPENGL)
有没有什么方法可以创建OpenGL曲面并将整个游戏渲染到该曲面上,因此我可以获得OpenGL功能(Steam Overlay),而无需重做大量代码并重新创建很多游戏?该游戏占用的资源不多,因此(希望)不会有太多的滞后,因此这绝对是我想尝试的方法。
除了在另一个库中重做游戏之外,我在这里还有其他选择吗?
基于此问题:Draw rectangle over texture OpenGL,它讨论了在PyGame中对OpenGL矩形进行纹理映射〜
这里有一些代码绘制到“屏幕外” PyGame表面。在每次主循环迭代中,该表面都会转换为OpenGL纹理贴图。然后将此纹理贴图映射到一个充满屏幕的矩形上。
该代码是一个非常简单的示例,也许您需要对其进行一些优化。
import pygame
import sys
from OpenGL.GL import *
from pygame.locals import *
# set pygame screen
pygame.init()
pygame.display.set_mode((500, 500), OPENGL | DOUBLEBUF)
pygame.display.init()
info = pygame.display.Info()
#colours
MIDNIGHT = ( 15, 0, 100 )
BUTTER = ( 255, 245, 100 )
# basic opengl configuration
glViewport(0, 0, info.current_w, info.current_h)
glDepthRange(0, 1)
glMatrixMode(GL_PROJECTION)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
glShadeModel(GL_SMOOTH)
glClearColor(0.0, 0.0, 0.0, 0.0)
glClearDepth(1.0)
glDisable(GL_DEPTH_TEST)
glDisable(GL_LIGHTING)
glDepthFunc(GL_LEQUAL)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
glEnable(GL_BLEND)
###
### Function to convert a PyGame Surface to an OpenGL Texture
### Maybe it's not necessary to perform each of these operations
### every time.
###
texID = glGenTextures(1)
def surfaceToTexture( pygame_surface ):
global texID
rgb_surface = pygame.image.tostring( pygame_surface, 'RGB')
glBindTexture(GL_TEXTURE_2D, texID)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP)
surface_rect = pygame_surface.get_rect()
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, surface_rect.width, surface_rect.height, 0, GL_RGB, GL_UNSIGNED_BYTE, rgb_surface)
glGenerateMipmap(GL_TEXTURE_2D)
glBindTexture(GL_TEXTURE_2D, 0)
# create pygame clock
clock = pygame.time.Clock()
# make an offscreen surface for drawing PyGame to
offscreen_surface = pygame.Surface((info.current_w, info.current_h))
text_font = pygame.font.Font( None, 30 ) # some default font
done = False
while not done:
# get quit event
for event in pygame.event.get():
if event.type == QUIT:
done = True
# Do all the PyGame operations to the offscreen surface
# So any backgrounds, sprites, etc. will get drawn to the offscreen
# rather than to the default window/screen.
offscreen_surface.fill( MIDNIGHT )
# write some nonsense to put something changing on the screen
words = text_font.render( "β-Moé-Moé count: "+str( pygame.time.get_ticks() ), True, BUTTER )
offscreen_surface.blit( words, (50, 250) )
# prepare to render the texture-mapped rectangle
glClear(GL_COLOR_BUFFER_BIT)
glLoadIdentity()
glDisable(GL_LIGHTING)
glEnable(GL_TEXTURE_2D)
#glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
#glClearColor(0, 0, 0, 1.0)
# draw texture openGL Texture
surfaceToTexture( offscreen_surface )
glBindTexture(GL_TEXTURE_2D, texID)
glBegin(GL_QUADS)
glTexCoord2f(0, 0); glVertex2f(-1, 1)
glTexCoord2f(0, 1); glVertex2f(-1, -1)
glTexCoord2f(1, 1); glVertex2f(1, -1)
glTexCoord2f(1, 0); glVertex2f(1, 1)
glEnd()
pygame.display.flip()
clock.tick(60)
pygame.quit()