JOGL小程序Win7下截屏

发布于 2024-08-19 15:27:34 字数 1055 浏览 4 评论 0原文

我正在尝试截取在 a 中运行的小程序的屏幕截图浏览器。该小程序使用 JOGL (OpenGL for Java) 来显示 3D 模型。 (1) 屏幕截图始终显示为黑色或白色。当前的解决方案使用通常的 GDI 调用。小程序的屏幕截图不运行 OpenGL 没问题。
可以在此处找到 JOGL 应用程序的一些示例 https://jogl-demos.dev.java.net / (2)我想要实现的另一件事是获取可滚动区域屏幕截图内也是如此。

我在互联网上找到了这段代码，除了 2 之外，它工作正常上面提到的问题。

import win32gui as wg  
import win32ui as wu  
import win32con  

def copyBitMap(hWnd, fname):  
    wg.SetForegroundWindow(hWnd)  
    cWnd = wu.CreateWindowFromHandle(hWnd)  
    rect = cWnd.GetClientRect()  
    (x,y) = (rect[2] - rect[0], rect[3] - rect[1])  
    hsrccDc = wg.GetDC(hWnd)  
    hdestcDc = wg.CreateCompatibleDC(hsrccDc)  
    hdestcBm = wg.CreateCompatibleBitmap(hsrccDc, x, y)  
    wg.SelectObject(hdestcDc, hdestcBm.handle)  
    wg.BitBlt(hdestcDc, 0, 0, x, y, hsrccDc, rect[0], rect[1], win32con.SRCCOPY)  
    destcDc = wu.CreateDCFromHandle(hdestcDc)  
    bmp = wu.CreateBitmapFromHandle(hdestcBm.handle)  
    bmp.SaveBitmapFile(destcDc, fname)

原文

I'm trying to take a screen shot of an applet running inside a
browser. The applet is using JOGL (OpenGL for Java) to display 3D
models. (1) The screen shots always come out either black or white.The
current solution uses the usual GDI calls. Screen shots of applets not
running OpenGL are fine.
A few examples of JOGL apps can be found here https://jogl-demos.dev.java.net/
(2) Another thing I'm trying to achieve is to get the scrollable area
inside the screen shot as well.

I found this code on the internet which works fine except for the 2
issues mentioned above.

import win32gui as wg  
import win32ui as wu  
import win32con  

def copyBitMap(hWnd, fname):  
    wg.SetForegroundWindow(hWnd)  
    cWnd = wu.CreateWindowFromHandle(hWnd)  
    rect = cWnd.GetClientRect()  
    (x,y) = (rect[2] - rect[0], rect[3] - rect[1])  
    hsrccDc = wg.GetDC(hWnd)  
    hdestcDc = wg.CreateCompatibleDC(hsrccDc)  
    hdestcBm = wg.CreateCompatibleBitmap(hsrccDc, x, y)  
    wg.SelectObject(hdestcDc, hdestcBm.handle)  
    wg.BitBlt(hdestcDc, 0, 0, x, y, hsrccDc, rect[0], rect[1], win32con.SRCCOPY)  
    destcDc = wu.CreateDCFromHandle(hdestcDc)  
    bmp = wu.CreateBitmapFromHandle(hdestcBm.handle)  
    bmp.SaveBitmapFile(destcDc, fname)

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暖风昔人 2024-08-26 15:27:34

除非你想自动化它，否则我只会使用 Firefox 扩展。其中有许多是从搜索“screenshot” 可以截取整个浏览器页面（包括可滚动区域）的屏幕截图：

FireShot
屏幕抓取
Snapper （适用于较旧的 Firefox 版本）

但是，我很抱歉，我对 Python 的了解不够，无法调试您的如果您确实尝试以编程方式执行此操作，则存在特定问题。

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猫九 2024-08-26 15:27:34

一种方法是在拍摄屏幕截图之前禁用 dwm（桌面窗口管理器）合成，但这会导致整个屏幕在启用/禁用时闪烁。

from ctypes import WinDLL
from time import sleep  
import win32gui as wg  
import win32ui as wu  
import win32con  

def copyBitMap(hWnd, fname):  
    dwm = WinDLL("dwmapi.dll")
    dwm.DwmEnableComposition(0)

    wg.SetForegroundWindow(hWnd)
    # Give the window sometime to redraw itself
    sleep(2)
    cWnd = wu.CreateWindowFromHandle(hWnd)
    rect = cWnd.GetClientRect()
    (x,y) = (rect[2] - rect[0], rect[3] - rect[1])
    hsrccDc = wg.GetDC(hWnd)
    hdestcDc = wg.CreateCompatibleDC(hsrccDc)
    hdestcBm = wg.CreateCompatibleBitmap(hsrccDc, x, y)
    wg.SelectObject(hdestcDc, hdestcBm.handle)
    wg.BitBlt(hdestcDc, 0, 0, x, y, hsrccDc, rect[0], rect[1], win32con.SRCCOPY)
    destcDc = wu.CreateDCFromHandle(hdestcDc)
    bmp = wu.CreateBitmapFromHandle(hdestcBm.handle)
    bmp.SaveBitmapFile(destcDc, fname)

    dwm.DwmEnableComposition(1)

Here is one way to do it by disabling dwm (Desktop Window Manager) composition before taking the screen shot, but this causes the whole screen to blink whenever its enabled/disabled.

from ctypes import WinDLL
from time import sleep  
import win32gui as wg  
import win32ui as wu  
import win32con  

def copyBitMap(hWnd, fname):  
    dwm = WinDLL("dwmapi.dll")
    dwm.DwmEnableComposition(0)

    wg.SetForegroundWindow(hWnd)
    # Give the window sometime to redraw itself
    sleep(2)
    cWnd = wu.CreateWindowFromHandle(hWnd)
    rect = cWnd.GetClientRect()
    (x,y) = (rect[2] - rect[0], rect[3] - rect[1])
    hsrccDc = wg.GetDC(hWnd)
    hdestcDc = wg.CreateCompatibleDC(hsrccDc)
    hdestcBm = wg.CreateCompatibleBitmap(hsrccDc, x, y)
    wg.SelectObject(hdestcDc, hdestcBm.handle)
    wg.BitBlt(hdestcDc, 0, 0, x, y, hsrccDc, rect[0], rect[1], win32con.SRCCOPY)
    destcDc = wu.CreateDCFromHandle(hdestcDc)
    bmp = wu.CreateBitmapFromHandle(hdestcBm.handle)
    bmp.SaveBitmapFile(destcDc, fname)

    dwm.DwmEnableComposition(1)

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