获取窗口的像素格式 [英] Getting a window's pixel format

问题描述

我创建了一个在Windows上运行的OpenGL应用程序.有什么方法可以查询有关当前渲染窗口的像素格式的信息? (该窗口是使用GLFW库创建的)

I have created an OpenGL application running on Windows. Is there any way I can query information about the pixel format of my current rendering window? (the window was created using the GLFW library)

我感兴趣的是

• 颜色位
• 深度位
• 像素类型
• 等

推荐答案

我这样做是这样的:

int i;
HDC hdc;
PIXELFORMATDESCRIPTOR pfd;
hdc = GetDC(window_handle);                     // get device context
i=GetPixelFormat(hdc);                          // pixel format descriptor index
DescribePixelFormat(hdc,i,sizeof(pfd),&pfd);    // format from index

window_handle是应用程序窗口的句柄.如果直接访问hdc，则可以跳过第一行GetDC.这就是我使用 VCL 和我的 GL 引擎打印信息的方式:

Where window_handle is handle of your apps window. If you got access to the hdc directly than you can skip the first line GetDC. This is how I print the info using VCL and my GL engine:

scr.text(AnsiString().sprintf("color: %i bit R%i G%i B%i A%i",pfd.cColorBits,pfd.cRedBits,pfd.cGreenBits,pfd.cBlueBits,pfd.cAlphaBits));
scr.text(AnsiString().sprintf("accum: %i",pfd.cAccumBits));
scr.text(AnsiString().sprintf("depth: %i",pfd.cDepthBits));
scr.text(AnsiString().sprintf("stenc: %i",pfd.cStencilBits));
scr.text(AnsiString().sprintf("auxil: %i",pfd.cAuxBuffers));

因此，只需使用您可以支配的文字打印即可. pfd结构中还有更多内容，例如移位，掩码等，只需对其进行检查并打印所需的内容即可.

so just use what you got at your disposal for text print. There is a bit more in the pfd structure like bit-shifts, masks etc just inspect it and print what you need.

这篇关于获取窗口的像素格式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！