GDI/图象编程

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Visual C++

GdiPlusimageAttributes.h：源码内容
							/**************************************************************************
*
* Copyright (c) 1998-2000, Microsoft Corp.  All Rights Reserved.
*
* Module Name:
*
*   Image Attributes
*
* Abstract:
*
*   Class for color adjustment object passed to Graphics.DrawImage
*
**************************************************************************/
#ifndef _GDIPLUSIMAGEATTRIBUTES_H
#define _GDIPLUSIMAGEATTRIBUTES_H
class GpImageAttributes;
// There are 5 possible sets of color adjustments:
//          ColorAdjustDefault,
//          ColorAdjustBitmap,
//          ColorAdjustBrush,
//          ColorAdjustPen,
//          ColorAdjustText,
// Bitmaps, Brushes, Pens, and Text will all use any color adjustments
// that have been set into the default ImageAttributes until their own
// color adjustments have been set.  So as soon as any "Set" method is
// called for Bitmaps, Brushes, Pens, or Text, then they start from
// scratch with only the color adjustments that have been set for them.
// Calling Reset removes any individual color adjustments for a type
// and makes it revert back to using all the default color adjustments
// (if any).  The SetToIdentity method is a way to force a type to
// have no color adjustments at all, regardless of what previous adjustments
// have been set for the defaults or for that type.
class ImageAttributes : public GdiplusBase
{
    friend class Graphics;
    friend class TextureBrush;
public:
    ImageAttributes()
    {
        nativeImageAttr = NULL;
        lastResult = DllExports::GdipCreateImageAttributes(&nativeImageAttr);
    }
    ~ImageAttributes()
    {
        DllExports::GdipDisposeImageAttributes(nativeImageAttr);
    }
    ImageAttributes* Clone() const
    {
        GpImageAttributes* clone;
        SetStatus(DllExports::GdipCloneImageAttributes(
                                            nativeImageAttr,
                                            &clone));
        return new ImageAttributes(clone, lastResult);
    }
    // Set to identity, regardless of what the default color adjustment is.
    Status
    SetToIdentity(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesToIdentity(
                                            nativeImageAttr,
                                            type));
    }
    // Remove any individual color adjustments, and go back to using the default
    Status
    Reset(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipResetImageAttributes(
                                            nativeImageAttr,
                                            type));
    }
    Status
    SetColorMatrix(
        IN const ColorMatrix *colorMatrix,
        IN ColorMatrixFlags mode = ColorMatrixFlagsDefault,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesColorMatrix(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            colorMatrix,
                                            NULL,
                                            mode));
    }
    Status ClearColorMatrix(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesColorMatrix(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            NULL,
                                            NULL,
                                            ColorMatrixFlagsDefault));
    }
    Status
    SetColorMatrices(
        IN const ColorMatrix *colorMatrix,
        IN const ColorMatrix *grayMatrix,
        IN ColorMatrixFlags mode = ColorMatrixFlagsDefault,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesColorMatrix(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            colorMatrix,
                                            grayMatrix,
                                            mode));
    }
    Status ClearColorMatrices(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesColorMatrix(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            NULL,
                                            NULL,
                                            ColorMatrixFlagsDefault));
    }
    Status SetThreshold(
        IN REAL threshold,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesThreshold(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            threshold));
    }
    Status ClearThreshold(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesThreshold(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            0.0));
    }
    Status SetGamma(
        IN REAL gamma,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesGamma(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            gamma));
    }
    Status ClearGamma(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesGamma(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            0.0));
    }
    Status SetNoOp(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesNoOp(
                                            nativeImageAttr,
                                            type,
                                            TRUE));
    }
    Status ClearNoOp(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesNoOp(
                                            nativeImageAttr,
                                            type,
                                            FALSE));
    }
    Status SetColorKey(
        IN const Color& colorLow, 
        IN const Color& colorHigh,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesColorKeys(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            colorLow.GetValue(),
                                            colorHigh.GetValue()));
    }
    Status ClearColorKey(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesColorKeys(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            NULL,
                                            NULL));
    }
    Status SetOutputChannel(
        IN ColorChannelFlags channelFlags,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesOutputChannel(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            channelFlags));
    }
    
    Status ClearOutputChannel(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesOutputChannel(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            ColorChannelFlagsLast));
    }
    Status SetOutputChannelColorProfile(
        IN const WCHAR *colorProfileFilename,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesOutputChannelColorProfile(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            colorProfileFilename));
    }
    
    Status ClearOutputChannelColorProfile(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesOutputChannelColorProfile(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            NULL));
    }
    
    Status SetRemapTable(
        IN UINT mapSize, 
        IN const ColorMap *map,
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesRemapTable(
                                            nativeImageAttr,
                                            type,
                                            TRUE,
                                            mapSize,
                                            map));
    }
    Status ClearRemapTable(
        IN ColorAdjustType type = ColorAdjustTypeDefault
        )
    {
        return SetStatus(DllExports::GdipSetImageAttributesRemapTable(
                                            nativeImageAttr,
                                            type,
                                            FALSE,
                                            0,
                                            NULL));
    }
    Status SetBrushRemapTable(IN UINT mapSize, 
                              IN const ColorMap *map)
    {
        return this->SetRemapTable(mapSize, map, ColorAdjustTypeBrush);
    }
    Status ClearBrushRemapTable()
    {
        return this->ClearRemapTable(ColorAdjustTypeBrush);
    }
    Status SetWrapMode(IN WrapMode wrap, 
                       IN const Color& color = Color(), 
                       IN BOOL clamp = FALSE) 
    {
        ARGB argb = color.GetValue();
        return SetStatus(DllExports::GdipSetImageAttributesWrapMode(
                           nativeImageAttr, wrap, argb, clamp));
    }
    #ifndef DCR_USE_NEW_145139
    Status SetICMMode(IN BOOL on)
    {
        on;
        // This is not implemented.
        // The supported method for doing ICM conversion from the embedded 
        // ICC profile is to use the Bitmap constructor from a file or stream
        // and specify TRUE for the useIcm parameter. This will cause the 
        // image to be ICM converted when it's loaded from the file/stream
        // if the profile exists.
        return SetStatus(NotImplemented);
//          DllExports::GdipSetImageAttributesICMMode(nativeImageAttr, on)
    }
    #endif
    // The flags of the palette are ignored.
    Status GetAdjustedPalette(IN OUT ColorPalette* colorPalette,
                              IN ColorAdjustType colorAdjustType) const 
    {
        return SetStatus(DllExports::GdipGetImageAttributesAdjustedPalette(
                           nativeImageAttr, colorPalette, colorAdjustType));
    }
    Status GetLastStatus() const
    {
        Status lastStatus = lastResult;
        lastResult = Ok;
    
        return lastStatus;
    }
    
#ifdef DCR_USE_NEW_250932
private:
    ImageAttributes(const ImageAttributes &);
    ImageAttributes& operator=(const ImageAttributes &);
#endif
protected:
    ImageAttributes(GpImageAttributes* imageAttr, Status status)
    {
        SetNativeImageAttr(imageAttr);
        lastResult = status;
    }
    VOID SetNativeImageAttr(GpImageAttributes* nativeImageAttr)
    {
        this->nativeImageAttr = nativeImageAttr;
    }
    
    Status SetStatus(Status status) const
    {
        if (status != Ok)
            return (lastResult = status);
        else 
            return status;
    }
protected:
    GpImageAttributes* nativeImageAttr;
    mutable Status lastResult;
};
#endif

						