Python 将控制权从Pygame转移到SDL2导致CALayer异常 上下文
我从事认知科学，所以这个问题的背景很难表达。长话短说，我们有一个严重依赖PyGame的现存库；我们需要将SDL2用于特定的实验任务 我们的库在设计实验时扩展了一个基类Exp；它初始化PyGame，有一个简单且经过良好测试的准备序列，然后将控制权传递给实验者，以完成构成实验的一组抽象方法 目标：在切换时，杀死PyGame并切换到SDL2 问题：SDL2脚本下面的脚本在Exp环境之外使用时工作。但是，当它仅仅改变了一个小小的实验实现时，就会发生两件事： 我们正在使用SDL2加载的图像不会像SDL2窗口那样明显地绘制 引发异常：CALayer位置包含NaN:[NaN NaN] 当前可疑的Pygame和SDL2正在争夺两个名称空间，从程序启动时的终端输出可以看出：Python 将控制权从Pygame转移到SDL2导致CALayer异常 上下文,python,pygame,sdl,sdl-2,Python,Pygame,Sdl,Sdl 2,我从事认知科学，所以这个问题的背景很难表达。长话短说，我们有一个严重依赖PyGame的现存库；我们需要将SDL2用于特定的实验任务 我们的库在设计实验时扩展了一个基类Exp；它初始化PyGame，有一个简单且经过良好测试的准备序列，然后将控制权传递给实验者，以完成构成实验的一组抽象方法 目标：在切换时，杀死PyGame并切换到SDL2 问题：SDL2脚本下面的脚本在Exp环境之外使用时工作。但是，当它仅仅改变了一个小小的实验实现时，就会发生两件事： 我们正在使用SDL2加载的图像不会像SDL2窗
objc[34300]: Class SDLTranslatorResponder is implemented in both /Library/Frameworks/SDL.framework/Versions/A/SDL and /Library/Frameworks/SDL2.framework/SDL2. One of the two will be used. Which one is undefined.
objc[34300]: Class SDLApplication is implemented in both /Library/Frameworks/SDL2.framework/SDL2 and /Library/Python/2.7/site-packages/pygame/sdlmain_osx.so. One of the two will be used. Which one is undefined.
在咨询了一些内部的书呆子（他们确认了对我问题的评论）后，解决方案是：同时使用PyGame和SDL2通常比用SDL2替换PyGame需要更多的工作。不要这样做
把我的问题留着以防万一 您正在加载SDL1和SDL2；你不想那么做，是的。我知道。我希望有人能比我更容易搞出书呆子来，或者找个黑客或者做点什么。唉，唯一能绕过这个UB的黑客需要做的工作就是升级到pygame2和抛弃SDL1，这是你真正需要做的。是的，我承认这一点。所有的叹息。
import sdl2
import sdl2.ext
import numpy
from PIL import Image
import time
import OpenGL.GL as gl
from scipy import misc
import os
stimDisplayRes = (1366,768) #pixel resolution of the stimDisplay
imgs = []
img_path = "path/to/jpgs"
# this loop just grabs our images; works fine in both scripts
for x in range(1, 450):
x = str(int(x * 2.5)).zfill(8)
path = os.path.join(img_path, "{0}.jpg".format(x))
imgs.append(numpy.array(Image.open(path)))
sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO)
stimDisplay = sdl2.ext.Window("Experiment", size=stimDisplayRes,position=(0,0),flags=sdl2.SDL_WINDOW_OPENGL|sdl2.SDL_WINDOW_SHOWN| sdl2.SDL_WINDOW_FULLSCREEN_DESKTOP |sdl2.SDL_RENDERER_ACCELERATED | sdl2.SDL_RENDERER_PRESENTVSYNC)
glContext = sdl2.SDL_GL_CreateContext(stimDisplay.window)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
gl.glOrtho(0, stimDisplayRes[0],stimDisplayRes[1], 0, 0, 1)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glDisable(gl.GL_DEPTH_TEST)
sdl2.SDL_PumpEvents() # to show the windows
time.sleep(1)
def blitNumpy(numpyArray,xLoc,yLoc,xCentered=True,yCentered=True):
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
ID = gl.glGenTextures(1)
gl.glBindTexture(gl.GL_TEXTURE_2D, ID)
gl.glTexEnvi(gl.GL_TEXTURE_ENV, gl.GL_TEXTURE_ENV_MODE, gl.GL_REPLACE);
gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_S, gl.GL_CLAMP)
gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_T, gl.GL_CLAMP)
gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
gl.glTexParameterf(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR)
if len(numpyArray.shape)==3: #no alpha channel
gl.glTexImage2D( gl.GL_TEXTURE_2D , 0 , gl.GL_RGBA , numpyArray.shape[1] , numpyArray.shape[0] , 0 , gl.GL_RGB , gl.GL_UNSIGNED_BYTE , numpyArray )
elif len(numpyArray.shape)==4: #alpha channel
gl.glTexImage2D( gl.GL_TEXTURE_2D , 0 , gl.GL_RGBA , numpyArray.shape[1] , numpyArray.shape[0] , 0 , gl.GL_RGBA , gl.GL_UNSIGNED_BYTE , numpyArray )
gl.glEnable(gl.GL_TEXTURE_2D)
gl.glBindTexture(gl.GL_TEXTURE_2D, ID)
gl.glBegin(gl.GL_QUADS)
x1 = xLoc + 1.5 - 0.5
x2 = xLoc + numpyArray.shape[1] - 0.0 + 0.5
y1 = yLoc + 1.0 - 0.5
y2 = yLoc + numpyArray.shape[0] - 0.5 + 0.5
if xCentered:
x1 = x1 - numpyArray.shape[1]/2.0
x2 = x2 - numpyArray.shape[1]/2.0
if yCentered:
y1 = y1 - numpyArray.shape[0]/2.0
y2 = y2 - numpyArray.shape[0]/2.0
gl.glTexCoord2f( 0 , 0 )
gl.glVertex2f( x1 , y1 )
gl.glTexCoord2f( 1 , 0 )
gl.glVertex2f( x2 , y1 )
gl.glTexCoord2f( 1 , 1)
gl.glVertex2f( x2 , y2 )
gl.glTexCoord2f( 0 , 1 )
gl.glVertex2f( x1, y2 )
gl.glEnd()
gl.glBindTexture(gl.GL_TEXTURE_2D, 0)
gl.glDeleteTextures([ID])
del ID
gl.glDisable(gl.GL_TEXTURE_2D)
return None
# this is a little loop we're using to get our "frame rate" right; if this is made to work, I'm good from here
i = 0
j = 0
start = time.time()
while time.time()-start<10:
time.sleep(.01) #pretend to do 5ms of other work per frame
gl.glClearColor(0,0,0,1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
blitNumpy(imgs[i],0,0,xCentered=False,yCentered=False)
sdl2.SDL_GL_SwapWindow(stimDisplay.window)
i+= 1
if i == len(imgs):
i=0
j += 1
print j/(time.time()-start) # we just happen to need this metric
class Experiment(ExpLib.Exp):
first_run = True #
# bunch of methods that don't interact with either PyGame or SDL2—science stuff
def trial(self, trial_factors, trial_num):
if self.first_run:
pygame.quit()
self.first_run = False
time.sleep(0.1) # maybe unnecessary; just giving PyGame a chance to be fully shut down
# this next call wraps the script above; the only difference is that
# blitNumpy becomes self.blitNumpy, and our FPS loop
self.sdl_trial()
# the experiment's code will go here if I can get this to fly