如何找出DC的尺寸？ [英] How to find out DC's dimensions?

问题描述

让我说我可以处理设备上下文（自然是在Windows环境中）：

Let's say I have a handle to device context (naturally, in Windows environment):

HDC hdc;

如何获取宽度和高度？

推荐答案

设备上下文（DC）是一种结构，它定义了一组图形对象及其关联的属性以及影响输出的图形模式。

A device context (DC) is a structure that defines a set of graphic objects and their associated attributes, and the graphic modes that affect output.

按宽度和高度，我猜您指的是绘制的位图？

如果是这样，我想您可以尝试以下操作：

By width and height I'm guessing you are referring to the bitmap painted ?
If so then i guess you can try the following :

BITMAP structBitmapHeader;
memset( &structBitmapHeader, 0, sizeof(BITMAP) );

HGDIOBJ hBitmap = GetCurrentObject(hDC, OBJ_BITMAP);
GetObject(hBitmap, sizeof(BITMAP), &structBitmapHeader);

//structBitmapHeader.bmWidth
//structBitmapHeader.bmHeight

这篇关于如何找出DC的尺寸？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！