我有一个PyQt应用程序,其中QtOpenGL.QGLWidget显示一个风力涡轮机。从高分辨率的opengl(pyqt)保存图像:
我想涡轮保存为高resulution的图像,但到目前为止,我只能够保存渲染的屏幕图像,也就是在我的情况下1680×1050减去边框,工具栏等
glPixelStorei(GL_PACK_ALIGNMENT, 1)
data = glReadPixels(0, 0, self.width, self.height, GL_RGBA, GL_UNSIGNED_BYTE)
我怎样才能解决这个限制?
编辑
我一直在使用一个帧缓冲区试过,
from __future__ import division
import OpenGL
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
from PIL import Image
import time, sys
import numpy as np
WIDTH = 400
HEIGHT = 300
def InitGL():
glMatrixMode(GL_PROJECTION)
gluPerspective(45.0, float(WIDTH)/float(HEIGHT), 0.1, 100.0)
glMatrixMode(GL_MODELVIEW)
def DrawGLScene():
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
glTranslatef(0, 0., -3)
glutWireTeapot(1)
glFlush()
def capture_screen():
DrawGLScene()
glPixelStorei(GL_PACK_ALIGNMENT, 1)
data = glReadPixels(0, 0, WIDTH, HEIGHT, GL_RGBA, GL_UNSIGNED_BYTE)
image = Image.fromstring("RGBA", (WIDTH, HEIGHT), data)
image.transpose(Image.FLIP_TOP_BOTTOM).show()
def capture_fbo(width=800, height=600):
fbo = glGenFramebuffers(1)
render_buf = glGenRenderbuffers(1)
glBindRenderbuffer(GL_RENDERBUFFER, render_buf)
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, width, height);
glBindFramebuffer(GL_FRAMEBUFFER, fbo)
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, render_buf);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
glTranslatef(1, 1., -3)
glScale(width/WIDTH, height/HEIGHT, 1)
glutWireTeapot(1.0)
glFlush()
glReadBuffer(GL_COLOR_ATTACHMENT0);
data = glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE)
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
image = Image.fromstring("RGBA", (width, height), data)
image.transpose(Image.FLIP_TOP_BOTTOM).show()
glDeleteFramebuffers(1, [fbo]);
glDeleteRenderbuffers(1, [render_buf]);
glutInit(sys.argv)
glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH)
glutInitWindowSize(WIDTH, HEIGHT)
window = glutCreateWindow("")
glutDisplayFunc(DrawGLScene)
InitGL()
DrawGLScene()
capture_screen()
capture_fbo()
glutMainLoop()
,但没有在该地区被描绘的常态屏幕窗口区域外
创建一个更高分辨率的FBO渲染到它并保存 –
我已经尝试过,但我没有成功看到有问题的编辑 –