[教程]第九讲 GDI+画刷

12月112014

作者：绿色风发布：2014-12-11 12:18 Thursday 分类：阅读：5773次评论：0条

ACN论坛.讲师：seniors 转载请说明此文出处所在:<<简易工作室>>，谢谢！

GDI+是GDI的升级版吧（我就这样叫他吧），GDI+的功能要比GDI强，只是可能比GDI稍慢些（我没有测试，也不会测试）。
GDI+的操作对象我叫他为画布，在AU3中叫Graphics，所有的图就是画在这个画布上的。
GDI+要用到的工具也有画笔，画刷，路径，选区，只是功能比GDI的要多，而且不要select操作，直接在绘图时指定用哪一个工具就行了。
另外，画图要用到颜色，GDI+的颜色是ARGB格式，能指定透明度。
接下来，不多说，看实例，先重点讲画刷。
一、画刷
GDI+的画刷有5种
0、纯色画刷

_GDIPlus_BrushCreateSolid(颜色)
_GDIPlus_BrushSetFillColor;可以设定画刷颜色

1、阴影画刷

_GDIPlus_HatchBrushCreate(阴影线类型,前景色,背景色)

阴影线类型共有53种，对应数值从0到52

2、纹理画刷

_GDIPlus_TextureCreate( $hImage[, $iWrapMode = 0] )
_GDIPlus_TextureCreate2( $hImage, $nX, $nY, $nWidth, $nHeight[, $iWrapMode = 0] )

$hImage可以从文件获取，也可以是自己绘出的图形

$iWrapMode称为地砖贴法

        0 - 无翻转平铺
        1 - 当在一行中移动到下一平铺单元时进行水平翻转
        2 - 当在一列中移动到下一平铺单元时进行垂直翻转
        3 - 行方向水平翻转且列方向垂直翻转
        4 - 无平铺

3、径向渐变画刷

_GDIPlus_PathBrushCreate($aPoints[, $iWrapMode = 0])
_GDIPlus_PathBrushCreateFromPath($hPath)

4、线性渐变画刷

        _GDIPlus_LineBrushCreate($nX1, $nY1, $nX2, $nY2, $iARGBClr1, $iARGBClr2[, $iWrapMode = 0])
        _GDIPlus_LineBrushCreateFromRect($tRectF, $iARGBClr1, $iARGBClr2[, $iGradientMode = 0[, $iWrapMode = 0]])
        _GDIPlus_LineBrushCreateFromRectWithAngle($tRectF, $iARGBClr1, $iARGBClr2, $nAngle[, $fIsAngleScalable = True[, $iWrapMode = 0]])

对于渐变画刷，对颜色，位置等都可以设定，函数较多，自己多试多体会吧

实例源码

#include <APIConstants.au3>
#include <WinAPIEx.au3>
#include <GDIPlus.au3>
#include <GDIPlusEx.au3>

Global $hCallback = DllCallbackRegister("YourFunc", "int", "hWnd;uint;wparam;lparam");函数名，返回值，参数
Global $ptrCallback = DllCallbackGetPtr($hCallback)

GUICreate("第九讲", 300, 200)
$nCtrlId = GUICtrlCreatePic("", 0, 0, 300, 200)
$hPicWnd = GUICtrlGetHandle($nCtrlId)
;设置lable控件的处理函数，也就是所谓的控件子类化
Global $hOldProc = _WinAPI_SetWindowLong($hPicWnd, $GWL_WNDPROC, $ptrCallback)

GUISetState()

While 1
        $Msg = GUIGetMsg()
        Switch $Msg
                Case -3
                        ExitLoop
        EndSwitch
WEnd
GUIDelete()
Exit

Func YourFunc($hWnd, $iMsg, $wParam, $lParam)
        Local $au3Dir = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\AutoIt v3\Autoit", "InstallDir");au3安装目录
        Switch $iMsg
                Case $WM_PAINT
                        Local $tPAINTSTRUCT
                        Local $hDC = _WinAPI_BeginPaint($hWnd, $tPAINTSTRUCT)
                        ;获取控件长高
                        Local $HWND_CX = _WinAPI_GetWindowWidth($hWnd)
                        Local $HWND_CY = _WinAPI_GetWindowHeight($hWnd)
                        ;开始GDI+
                        _GDIPlus_Startup()
                        ;获取画布，这是从DC获取，还可以用_GDIPlus_GraphicsCreateFromHWND($hWnd)从控件句柄获取，使用完成要释放画布_GDIPlus_GraphicsDispose($hGraphics)
                        $hGraphics = _GDIPlus_GraphicsCreateFromHDC($hDC)
                        ;根据画布创建位图对象,我们等会的画图均是针对位图来操作的，也就是没有直接画在画布上，就是所谓的双缓冲画图
                        $hBitmap = _GDIPlus_BitmapCreateFromGraphics($HWND_CX, $HWND_CY, $hGraphics)
                        ;获取位图对象的画布，图就画在位图的画布上
                        $hBackbuffer = _GDIPlus_ImageGetGraphicsContext($hBitmap)
                        ;用颜色0xFFE0E0E0清除画布，GDI+的颜色全是ARGB格式，A是透明度，RGB是红绿蓝，这里FF就是不透明，E0E0E0是红绿蓝成分
                        _GDIPlus_GraphicsClear($hBackbuffer, 0xFFE0E0E0)
                        _GDIPlus_GraphicsSetSmoothingMode($hBackbuffer, 2);平滑模式，2为8*8抗距齿

                        ;纯色画刷_GDIPlus_BrushGetType($hBrush)返回值是0
                        $hBrush = _GDIPlus_BrushCreateSolid(0xFFFF0000)
                        ;还可以用_GDIPlus_BrushSetFillColor($hBrush, $iARGB)设置颜色
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush); GDI+几乎所有操作都是指定画笔或者画刷的，不需要象GDI中先把画笔、画刷选入DC
                        _GDIPlus_BrushDispose($hBrush);画刷用完要释放
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "纯色", 10, 60)

                        ;平移绘图平面，右移60，意思是指，以后的所有操作多会右移60
                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        ;阴影画刷_GDIPlus_BrushGetType($hBrush)返回值是1
                        $hBrush = _GDIPlus_HatchBrushCreate(52, 0xFFFF0000, 0xFFFFFFFF)
                        ;这里是要右移60的基础上画在5，5坐标，如果不移动的话就是画在65，65坐标
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "阴影", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0);平移绘图平面，右移60
                        ;读取纹理填充的图象
                        $hImage = _GDIPlus_ImageLoadFromFile($au3Dir & '\Examples\WinAPIEx\Extras\Tech.bmp')
                        ;纹理画刷_GDIPlus_BrushGetType($hBrush)返回值是2
                        $hBrush = _GDIPlus_TextureCreate($hImage);以图象为填充画刷
                        _GDIPlus_ImageDispose($hImage)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "纹理", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        ;建立圆形图形路径
                        $hPath = _GDIPlus_PathCreate()
                        _GDIPlus_PathAddEllipse($hPath, 5, 5, 50, 50)
                        ;径向渐变画刷_GDIPlus_BrushGetType($hBrush)返回值是3
                        $hBrush = _GDIPlus_PathBrushCreateFromPath($hPath)
                        _GDIPlus_PathDispose($hPath)
                        ;设置径向渐变的中心点，如果这里不设置的话，就是在圆的中心
                        _GDIPlus_PathBrushSetCenterPoint($hBrush, 20, 20)
                        ;设置中心颜色为白色
                        _GDIPlus_PathBrushSetCenterColor($hBrush, 0xFFFFFFFF)
                        Dim $aColors[2] = [1, 0xFFFF0000]
                        ;设置外围颜色，共一个颜色是红色
                        _GDIPlus_PathBrushSetSurroundColorsWithCount($hBrush, $aColors)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "径向", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        ;线性渐变画刷_GDIPlus_BrushGetType($hBrush)返回值是4
                        $hBrush = _GDIPlus_LineBrushCreate(0, 0, 10, 10, 0xFFFFFFFF, 0xFFFF0000, 1)
;~                      _GDIPlus_LineBrushSetLinearBlend($hBrush, 0.5)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "线性", 10, 60)
                        ;========================重置操作
                        _GDIPlus_GraphicsResetTransform($hBackbuffer)
                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 0, 80);画布下移80，指以后所有操作下移80
                        _GDIPlus_GraphicsScaleTransform($hBackbuffer, 1, 1.2);画布缩放，指以后所有操作X方向不变，Y方向放大 1.2
                        _GDIPlus_GraphicsRotateTransform($hBackbuffer, 10);画布旋转，指以后所有操作旋转10度

                        $hBrush = _GDIPlus_BrushCreateSolid(0xFFFF0000)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush);
                        _GDIPlus_BrushDispose($hBrush);
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "纯色", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        $hBrush = _GDIPlus_HatchBrushCreate(50, 0xFFFF0000, 0xFFFFFFFF)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "阴影", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        $hImage = _GDIPlus_ImageLoadFromFile($au3Dir & '\Examples\WinAPIEx\Extras\Tech.bmp')
                        $hBrush = _GDIPlus_TextureCreate($hImage);以图象为填充画刷
                        _GDIPlus_ImageDispose($hImage)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "纹理", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        $hPath = _GDIPlus_PathCreate()
                        _GDIPlus_PathAddEllipse($hPath, 5, 5, 50, 50)
                        $hBrush = _GDIPlus_PathBrushCreateFromPath($hPath)
                        _GDIPlus_PathDispose($hPath)
;~                      _GDIPlus_PathBrushSetCenterPoint($hBrush, 20, 20)
                        _GDIPlus_PathBrushSetCenterColor($hBrush, 0xFFFFFFFF)
                        Dim $aColors[2] = [1, 0xFFFF0000]
                        _GDIPlus_PathBrushSetSurroundColorsWithCount($hBrush, $aColors)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "径向", 10, 60)

                        _GDIPlus_GraphicsTranslateTransform($hBackbuffer, 60, 0)
                        $hBrush = _GDIPlus_LineBrushCreate(0, 0, 10, 10, 0xFFFFFFFF, 0xFFFF0000, 1)
                        _GDIPlus_LineBrushSetLinearBlend($hBrush, 0.5)
                        _GDIPlus_GraphicsFillEllipse($hBackbuffer, 5, 5, 50, 50, $hBrush)
                        _GDIPlus_BrushDispose($hBrush)
                        _GDIPlus_GraphicsDrawString($hBackbuffer, "线性", 10, 60)
                        ;画在位图画布上的图形，在$hBitap上，把$hBitmap画入DC的画布，也就在DC上显示了，双缓冲画图时间再长，画入DC画布就一次操作，图形不会闪烁
                        _GDIPlus_GraphicsDrawImageRect($hGraphics, $hBitmap, 0, 0, 300, 200)
                        _GDIPlus_BitmapDispose($hBitmap)
                        _GDIPlus_GraphicsDispose($hBackbuffer)
                        _GDIPlus_GraphicsDispose($hGraphics)
                        _GDIPlus_Shutdown()
                        _WinAPI_EndPaint($hWnd, $tPAINTSTRUCT)
                        Return 0
        EndSwitch
        Return _WinAPI_CallWindowProc($hOldProc, $hWnd, $iMsg, $wParam, $lParam);没有处理的消息让原先的处理程序处理
EndFunc   ;==>YourFunc
```