windows编程之GDI基础--获取设备内容属性(三)

在设备内容中,会保存设备的属性.比如画线的颜色,字体等等.基本上是下面这张表.程序可以任意更改和取得这些属性的值.

设备内容属性

默认值

修改该值的函数

取得该值的函数

Mapping Mode

MM_TEXT

SetMapMode

GetMapMode

Window Origin

(0, 0)

SetWindowOrgEx

OffsetWindowOrgEx

GetWindowOrgEx

Viewport Origin

(0, 0)

SetViewportOrgEx

OffsetViewportOrgEx

GetViewportOrgEx

Window Extents

(1, 1)

SetWindowExtEx

SetMapMode

ScaleWindowExtEx

GetWindowExtEx

Viewport Extents

(1, 1)

SetViewportExtEx

SetMapMode

ScaleViewportExtEx

GetViewportExtEx

Pen

BLACK_PEN

SelectObject

SelectObject

Brush

WHITE_BRUSH

SelectObject

SelectObject

Font

SYSTEM_FONT

SelectObject

SelectObject

Bitmap

None

SelectObject

SelectObject

Current Position

(0, 0)

MoveToEx

LineTo

PolylineTo

PolyBezierTo

GetCurrentPositionEx

Background Mode

OPAQUE

SetBkMode

GetBkMode

Background Color

White

SetBkColor

GetBkColor

Text Color

Black

SetTextColor

GetTextColor

Drawing Mode

R2_COPYPEN

SetROP2

GetROP2

Stretching Mode

BLACKONWHITE

SetStretchBltMode

GetStretchBltMode

Polygon Fill Mode

ALTERNATE

SetPolyFillMode

GetPolyFillMode

Intercharacter Spacing

0

SetTextCharacterExtra

GetTextCharacterExtra

Brush Origin

(0, 0)

SetBrushOrgEx

GetBrushOrgEx

Clipping Region

None

SelectObject

SelectClipRgn

IntersectClipRgn

OffsetClipRgn

ExcludeClipRect

SelectClipPath

GetClipBox

在BeginPaint和EndPaint之间可以修改系统默认的属性,但是属性在EndPaint之后会失效.

若不想让他失效的话.在wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;

CS_OWNDC风格只影响GetDC和BeginPaint获得的设备内容,不影响其它函数(如GetWindowDC)获得的设备内容。

不推荐使用这个宏.

可以使用

idSaved = SaveDC (hdc) ;
RestoreDC (hdc, idSaved) ;
//或者
SaveDC (hdc) ;
RestoreDC (hdc, -1) ;

 

 

posted @ 2013-09-15 22:24  SoulReaper  阅读(440)  评论(0编辑  收藏  举报