使用自定义 QSurfaceFormat 时出现 PySide2 OpenGL 错误
PySide2 OpenGL error when using custom QSurfaceFormat
我正在使用 QSurfaceFormat 明确定义 OpenGL Core 配置文件 并设置 minor/major 版本。问题是，自定义表面格式的分配给我以下错误：
Traceback (most recent call last):
File "/home/artem/PycharmProjects/PolyEdit3D/PolyEdit3D/Widgets/PlyViewport.py", line 22, in initializeGL
gl.glEnable(gl.GL_COLOR_BUFFER_BIT)
File "/home/artem/.local/lib/python3.7/site-packages/OpenGL/platform/baseplatform.py", line 415, in __call__
return self( *args, **named )
File "src/errorchecker.pyx", line 58, in OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError
OpenGL.error.GLError: GLError(
err = 1280,
description = b'invalid enumerant',
baseOperation = glEnable,
cArguments = (GL_COLOR_BUFFER_BIT,)
)
Traceback (most recent call last):
File "/home/artem/PycharmProjects/PolyEdit3D/PolyEdit3D/Widgets/PlyViewport.py", line 69, in paintGL
gl.glDrawElements(gl.GL_TRIANGLES, 6, gl.GL_UNSIGNED_INT, ctypes.c_void_p(0))
File "src/latebind.pyx", line 39, in OpenGL_accelerate.latebind.LateBind.__call__
File "src/wrapper.pyx", line 318, in OpenGL_accelerate.wrapper.Wrapper.__call__
File "src/wrapper.pyx", line 311, in OpenGL_accelerate.wrapper.Wrapper.__call__
File "/home/artem/.local/lib/python3.7/site-packages/OpenGL/platform/baseplatform.py", line 415, in __call__
return self( *args, **named )
File "src/errorchecker.pyx", line 58, in OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError
OpenGL.error.GLError: GLError(
err = 1282,
description = b'invalid operation',
baseOperation = glDrawElements,
pyArgs = (
GL_TRIANGLES,
6,
GL_UNSIGNED_INT,
c_void_p(None),
),
cArgs = (
GL_TRIANGLES,
6,
GL_UNSIGNED_INT,
c_void_p(None),
),
cArguments = (
GL_TRIANGLES,
6,
GL_UNSIGNED_INT,
c_void_p(None),
)
)
如您所见，gl.glEnable(gl.GL_COLOR_BUFFER_BIT) 和其他简单内容中存在错误。没有指定 QSurfaceFormat 一切都很好。
这是我的表面格式 class:
class GLSurfaceFormat(QtGui.QSurfaceFormat):
def __init__(self):
super(GLSurfaceFormat, self).__init__()
self.__initSurface()
def __initSurface(self):
self.setRenderableType(QtGui.QSurfaceFormat.OpenGL)
self.setMinorVersion(3)
self.setMajorVersion(4)
self.setProfile(QtGui.QSurfaceFormat.CoreProfile)
self.setColorSpace(QtGui.QSurfaceFormat.sRGBColorSpace)
self.setSwapBehavior(QtGui.QSurfaceFormat.DoubleBuffer)
我是这样分配的：
QApplication.setAttribute(Qt.AA_UseDesktopOpenGL)
QSurfaceFormat.setDefaultFormat(GLSurfaceFormat())
app = QApplication(sys.argv)
...
你能告诉我，QSurfaceFormat 用法有什么错误吗？还是有其他问题？
！更新！
这是一个简单的示例，您可以在其中重现相同的行为：
from PySide2 import QtCore, QtGui, QtWidgets
from OpenGL import GL as gl
from OpenGL.GL.shaders import compileProgram, compileShader
import numpy as np
import ctypes
import sys
import glm
class PlyViewportWidget(QtWidgets.QOpenGLWidget):
def __init__(self):
super(PlyViewportWidget, self).__init__(parent=None)
self.vao = None
self.vbo = None
self.ebo = None
self.shaderProg = None
self.isWireframe = False
def initializeGL(self):
gl.glEnable(gl.GL_COLOR_BUFFER_BIT)
gl.glClearColor(0.4, 0.4, 0.4, 1)
with open("fragment.glsl", 'r') as f:
fragment = compileShader(f.read(), gl.GL_FRAGMENT_SHADER)
with open("vertex.glsl", "r") as f:
vertex = compileShader(f.read(), gl.GL_VERTEX_SHADER)
self.shaderProg = compileProgram(vertex, fragment)
vertices = np.array(
[
0.5, 0.5, 0.0,
0.5, -0.5, 0.0,
-0.5, -0.5, 0.0,
-0.5, 0.5, 0.0
], dtype=ctypes.c_float
)
indices = np.array(
[
0, 1, 3,
1, 2, 3
], dtype=ctypes.c_uint
)
self.vbo = gl.glGenBuffers(1)
self.ebo = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vbo)
gl.glBufferData(gl.GL_ARRAY_BUFFER, vertices.nbytes, vertices, gl.GL_STATIC_DRAW)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self.ebo)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, indices.nbytes, indices, gl.GL_STATIC_DRAW)
gl.glEnableVertexAttribArray(0)
gl.glVertexAttribPointer(0, 3, gl.GL_FLOAT, gl.GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), ctypes.c_void_p(0))
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
gl.glUseProgram(self.shaderProg)
def paintGL(self):
gl.glClearColor(0.4, 0.4, 0.4, 1.0)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
trans = self.getTransformMatrix()
#u_transform = gl.glGetUniformLocation(self.shaderProg, "u_transform")
#gl.glUniformMatrix4fv(u_transform, 1, gl.GL_FALSE, u_transform)
gl.glBindVertexArray(self.vao)
gl.glDrawElements(gl.GL_TRIANGLES, 6, gl.GL_UNSIGNED_INT, ctypes.c_void_p(0))
def resizeGL(self, w:int, h:int):
gl.glViewport(0, 0, w, h)
def keyPressEvent(self, event:QtGui.QKeyEvent):
self.makeCurrent()
if event.key() == QtCore.Qt.Key_Z and not self.isWireframe:
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_LINE)
self.isWireframe = True
self.update()
elif event.key() == QtCore.Qt.Key_Z and self.isWireframe:
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
self.isWireframe = False
self.update()
event.accept()
def getTransformMatrix(self):
return glm.rotate(glm.mat4(1.0), glm.radians(90.0), glm.vec3(1.0, 0.0, 0.0))
class GLSurfaceFormat(QtGui.QSurfaceFormat):
def __init__(self):
super(GLSurfaceFormat, self).__init__()
self.__initSurface()
def __initSurface(self):
self.setRenderableType(QtGui.QSurfaceFormat.OpenGL)
self.setMinorVersion(3)
self.setMajorVersion(4)
self.setProfile(QtGui.QSurfaceFormat.CoreProfile)
self.setColorSpace(QtGui.QSurfaceFormat.sRGBColorSpace)
self.setSwapBehavior(QtGui.QSurfaceFormat.DoubleBuffer)
if __name__ == '__main__':
QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_UseDesktopOpenGL)
# Uncomment to get this damn error!!!
#QtGui.QSurfaceFormat.setDefaultFormat(GLSurfaceFormat())
app = QtWidgets.QApplication(sys.argv)
window = PlyViewportWidget()
window.show()
sys.exit(app.exec_())
vertex.glsl
#version 330 core
layout (location = 0) in vec3 aPos;
void main()
{
gl_Position = vec4(aPos, 1.0);
}
fragment.glsl
#version 330 core
out vec4 FragColor;
void main()
{
FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
}
GL_COLOR_BUFFER_BIT 不是 glEnable, but it is a proper argument for glClear 的有效枚举常量。
调用glClear，清除颜色由glClearColor:
设置后
class PlyViewportWidget(QtWidgets.QOpenGLWidget):
# [...]
def initializeGL(self):
#gl.glEnable(gl.GL_COLOR_BUFFER_BIT) <---- DELETE
gl.glClearColor(0.4, 0.4, 0.4, 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT) # <---- ADD
您错过了创建命名 Vertex Array Object:
class PlyViewportWidget(QtWidgets.QOpenGLWidget):
# [...]
def initializeGL(self):
# [...]
self.vao = gl.glGenVertexArrays(1) # <---
gl.glBindVertexArray(self.vao) # <---
self.vbo = gl.glGenBuffers(1)
self.ebo = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vbo)
gl.glBufferData(gl.GL_ARRAY_BUFFER, vertices.nbytes, vertices, gl.GL_STATIC_DRAW)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self.ebo)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, indices.nbytes, indices, gl.GL_STATIC_DRAW)
gl.glEnableVertexAttribArray(0)
gl.glVertexAttribPointer(0, 3, gl.GL_FLOAT, gl.GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), ctypes.c_void_p(0))
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
我正在使用 QSurfaceFormat 明确定义 OpenGL Core 配置文件 并设置 minor/major 版本。问题是，自定义表面格式的分配给我以下错误：
Traceback (most recent call last):
File "/home/artem/PycharmProjects/PolyEdit3D/PolyEdit3D/Widgets/PlyViewport.py", line 22, in initializeGL
gl.glEnable(gl.GL_COLOR_BUFFER_BIT)
File "/home/artem/.local/lib/python3.7/site-packages/OpenGL/platform/baseplatform.py", line 415, in __call__
return self( *args, **named )
File "src/errorchecker.pyx", line 58, in OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError
OpenGL.error.GLError: GLError(
err = 1280,
description = b'invalid enumerant',
baseOperation = glEnable,
cArguments = (GL_COLOR_BUFFER_BIT,)
)
Traceback (most recent call last):
File "/home/artem/PycharmProjects/PolyEdit3D/PolyEdit3D/Widgets/PlyViewport.py", line 69, in paintGL
gl.glDrawElements(gl.GL_TRIANGLES, 6, gl.GL_UNSIGNED_INT, ctypes.c_void_p(0))
File "src/latebind.pyx", line 39, in OpenGL_accelerate.latebind.LateBind.__call__
File "src/wrapper.pyx", line 318, in OpenGL_accelerate.wrapper.Wrapper.__call__
File "src/wrapper.pyx", line 311, in OpenGL_accelerate.wrapper.Wrapper.__call__
File "/home/artem/.local/lib/python3.7/site-packages/OpenGL/platform/baseplatform.py", line 415, in __call__
return self( *args, **named )
File "src/errorchecker.pyx", line 58, in OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError
OpenGL.error.GLError: GLError(
err = 1282,
description = b'invalid operation',
baseOperation = glDrawElements,
pyArgs = (
GL_TRIANGLES,
6,
GL_UNSIGNED_INT,
c_void_p(None),
),
cArgs = (
GL_TRIANGLES,
6,
GL_UNSIGNED_INT,
c_void_p(None),
),
cArguments = (
GL_TRIANGLES,
6,
GL_UNSIGNED_INT,
c_void_p(None),
)
)
如您所见，gl.glEnable(gl.GL_COLOR_BUFFER_BIT) 和其他简单内容中存在错误。没有指定 QSurfaceFormat 一切都很好。
这是我的表面格式 class:
class GLSurfaceFormat(QtGui.QSurfaceFormat):
def __init__(self):
super(GLSurfaceFormat, self).__init__()
self.__initSurface()
def __initSurface(self):
self.setRenderableType(QtGui.QSurfaceFormat.OpenGL)
self.setMinorVersion(3)
self.setMajorVersion(4)
self.setProfile(QtGui.QSurfaceFormat.CoreProfile)
self.setColorSpace(QtGui.QSurfaceFormat.sRGBColorSpace)
self.setSwapBehavior(QtGui.QSurfaceFormat.DoubleBuffer)
我是这样分配的：
QApplication.setAttribute(Qt.AA_UseDesktopOpenGL)
QSurfaceFormat.setDefaultFormat(GLSurfaceFormat())
app = QApplication(sys.argv)
...
你能告诉我，QSurfaceFormat 用法有什么错误吗？还是有其他问题？
！更新！ 这是一个简单的示例，您可以在其中重现相同的行为：
from PySide2 import QtCore, QtGui, QtWidgets
from OpenGL import GL as gl
from OpenGL.GL.shaders import compileProgram, compileShader
import numpy as np
import ctypes
import sys
import glm
class PlyViewportWidget(QtWidgets.QOpenGLWidget):
def __init__(self):
super(PlyViewportWidget, self).__init__(parent=None)
self.vao = None
self.vbo = None
self.ebo = None
self.shaderProg = None
self.isWireframe = False
def initializeGL(self):
gl.glEnable(gl.GL_COLOR_BUFFER_BIT)
gl.glClearColor(0.4, 0.4, 0.4, 1)
with open("fragment.glsl", 'r') as f:
fragment = compileShader(f.read(), gl.GL_FRAGMENT_SHADER)
with open("vertex.glsl", "r") as f:
vertex = compileShader(f.read(), gl.GL_VERTEX_SHADER)
self.shaderProg = compileProgram(vertex, fragment)
vertices = np.array(
[
0.5, 0.5, 0.0,
0.5, -0.5, 0.0,
-0.5, -0.5, 0.0,
-0.5, 0.5, 0.0
], dtype=ctypes.c_float
)
indices = np.array(
[
0, 1, 3,
1, 2, 3
], dtype=ctypes.c_uint
)
self.vbo = gl.glGenBuffers(1)
self.ebo = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vbo)
gl.glBufferData(gl.GL_ARRAY_BUFFER, vertices.nbytes, vertices, gl.GL_STATIC_DRAW)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self.ebo)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, indices.nbytes, indices, gl.GL_STATIC_DRAW)
gl.glEnableVertexAttribArray(0)
gl.glVertexAttribPointer(0, 3, gl.GL_FLOAT, gl.GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), ctypes.c_void_p(0))
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)
gl.glUseProgram(self.shaderProg)
def paintGL(self):
gl.glClearColor(0.4, 0.4, 0.4, 1.0)
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
trans = self.getTransformMatrix()
#u_transform = gl.glGetUniformLocation(self.shaderProg, "u_transform")
#gl.glUniformMatrix4fv(u_transform, 1, gl.GL_FALSE, u_transform)
gl.glBindVertexArray(self.vao)
gl.glDrawElements(gl.GL_TRIANGLES, 6, gl.GL_UNSIGNED_INT, ctypes.c_void_p(0))
def resizeGL(self, w:int, h:int):
gl.glViewport(0, 0, w, h)
def keyPressEvent(self, event:QtGui.QKeyEvent):
self.makeCurrent()
if event.key() == QtCore.Qt.Key_Z and not self.isWireframe:
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_LINE)
self.isWireframe = True
self.update()
elif event.key() == QtCore.Qt.Key_Z and self.isWireframe:
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL)
self.isWireframe = False
self.update()
event.accept()
def getTransformMatrix(self):
return glm.rotate(glm.mat4(1.0), glm.radians(90.0), glm.vec3(1.0, 0.0, 0.0))
class GLSurfaceFormat(QtGui.QSurfaceFormat):
def __init__(self):
super(GLSurfaceFormat, self).__init__()
self.__initSurface()
def __initSurface(self):
self.setRenderableType(QtGui.QSurfaceFormat.OpenGL)
self.setMinorVersion(3)
self.setMajorVersion(4)
self.setProfile(QtGui.QSurfaceFormat.CoreProfile)
self.setColorSpace(QtGui.QSurfaceFormat.sRGBColorSpace)
self.setSwapBehavior(QtGui.QSurfaceFormat.DoubleBuffer)
if __name__ == '__main__':
QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_UseDesktopOpenGL)
# Uncomment to get this damn error!!!
#QtGui.QSurfaceFormat.setDefaultFormat(GLSurfaceFormat())
app = QtWidgets.QApplication(sys.argv)
window = PlyViewportWidget()
window.show()
sys.exit(app.exec_())
vertex.glsl
#version 330 core
layout (location = 0) in vec3 aPos;
void main()
{
gl_Position = vec4(aPos, 1.0);
}
fragment.glsl
#version 330 core
out vec4 FragColor;
void main()
{
FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
}
GL_COLOR_BUFFER_BIT 不是 glEnable, but it is a proper argument for glClear 的有效枚举常量。
调用glClear，清除颜色由glClearColor:
class PlyViewportWidget(QtWidgets.QOpenGLWidget):
# [...]
def initializeGL(self):
#gl.glEnable(gl.GL_COLOR_BUFFER_BIT) <---- DELETE
gl.glClearColor(0.4, 0.4, 0.4, 1)
gl.glClear(gl.GL_COLOR_BUFFER_BIT) # <---- ADD
您错过了创建命名 Vertex Array Object:
class PlyViewportWidget(QtWidgets.QOpenGLWidget):
# [...]
def initializeGL(self):
# [...]
self.vao = gl.glGenVertexArrays(1) # <---
gl.glBindVertexArray(self.vao) # <---
self.vbo = gl.glGenBuffers(1)
self.ebo = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vbo)
gl.glBufferData(gl.GL_ARRAY_BUFFER, vertices.nbytes, vertices, gl.GL_STATIC_DRAW)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self.ebo)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, indices.nbytes, indices, gl.GL_STATIC_DRAW)
gl.glEnableVertexAttribArray(0)
gl.glVertexAttribPointer(0, 3, gl.GL_FLOAT, gl.GL_FALSE, 3 * ctypes.sizeof(ctypes.c_float), ctypes.c_void_p(0))
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glBindVertexArray(0)