Symaptic: os/graphics/graphicsdeviceinterface/gdi/sgdi/PICTURE.CPP@bde4ae8d615e

     1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    16 #include <gdi.h>

    17 #include "GDIPANIC.h"

    19 _LIT(KGdiCPicturePanicCategory,"CPicture");

    21 EXPORT_C TPictureHeader::TPictureHeader():

    22 	iPicture(NULL),

    23 	iPictureType(KNullUid),

    24 	iSize()

    25 /** Constructs a default picture header. */

    26 	{}

    28 EXPORT_C void TPictureHeader::DeletePicture()

    29 /** Deletes the internalised picture.

    31 The picture can only be deleted if the picture has been internalized. */

    32 	{

    33 	if (iPicture.IsPtr())

    34 		{

    35 		delete iPicture.AsPtr();

    36 		iPicture=NULL;

    37 		}

    38 	}

    41 // Persist this object

    42 // Does not take responsibility for storing the picture

    43 //

    44 EXPORT_C void TPictureHeader::ExternalizeL(RWriteStream& aStream)const

    45 /** Externalises a picture header object to a write stream.

    47 The presence of this function means that the standard templated stream operator<<()

    48 is available to externalise objects of this class.

    50 @param aStream The write stream. */

    51     {

    52     aStream<< iPictureType;

    53     aStream<< iPicture;

    54 	aStream.WriteInt32L(iSize.iWidth);

    55 	aStream.WriteInt32L(iSize.iHeight);

    56     }

    59 // Restore this object from the specified stream

    60 // Does not take responsibility for restoring the picture

    61 //

    62 EXPORT_C void TPictureHeader::InternalizeL(RReadStream& aStream)

    63 /** Internalises a picture header object from a read stream.

    65 The presence of this function means that the standard templated stream operator>>()

    66 is available to internalise objects of this class.

    68 @param aStream The read stream. */

    69     {

    70     aStream>> iPictureType;

    71     aStream>> iPicture;

    72 	iSize.iWidth=aStream.ReadInt32L();

    73 	iSize.iHeight=aStream.ReadInt32L();

    74     }

    76 EXPORT_C CPicture::CPicture():

    77 	CBase()

    78 	{

    79 	__DECLARE_NAME(_S("CPicture"));

    80 	}

    82 EXPORT_C CPicture::~CPicture()

    83 /** Frees all resources owned by the object prior to its destruction. */

    84 	{}

    86 EXPORT_C TPictureCapability CPicture::Capability() const

    87 /** Gets the picture's capabilities.

    89 These include whether it is scalable and croppable.

    91 @return The capabilities of the picture. */

    92 	{

    93 	return TPictureCapability(TPictureCapability::ENotScaleable,EFalse);

    94 	}

    96 // Assumes everything goes into the head stream.

    97 // (Must be replaced by concrete pictures that have components)

    98 //

    99 EXPORT_C TStreamId CPicture::StoreL(CStreamStore& aStore) const

   100 /** Stores the picture to the specified store.

   102 The default implementation assumes that the content of the picture is externalized

   103 to a single stream. The implementation may need to be changed for those derived

   104 classes that have components.

   106 @param aStore The store.

   107 @return The ID of the (head) stream used to store the picture. */

   108 	{

   109 	RStoreWriteStream stream;

   110 	TStreamId id=stream.CreateLC(aStore);

   111 	ExternalizeL(stream);  // provided by the concrete picture stream.CommitL();

   112 	stream.CommitL();

   113 	CleanupStack::PopAndDestroy();

   114 	return id;

   115 	}

   117 EXPORT_C void CPicture::ResetToOriginal()

   118 /** Resets the picture's scaling and cropping attributes to their original values. */

   119 	{

   120 	TMargins cropInTwips;

   121 	cropInTwips.iLeft=0;

   122 	cropInTwips.iRight=0;

   123 	cropInTwips.iTop=0;

   124 	cropInTwips.iBottom=0;

   125 	SetCropInTwips(cropInTwips);

   126 	SetScaleFactor(1000,1000);

   127 	}

   129 EXPORT_C void CPicture::GetSizeInPixels(MGraphicsDeviceMap* aMap,TSize& aSize) const

   130 /** Gets the picture's size in pixels.

   132 This is calculated from the original size of the picture, taking cropping

   133 and scaling into account.

   135 @param aMap The pixels to twips mapping interface of the graphics device

   136 @param aSize The size of the picture, in pixels. */

   137 	{

   138 	GDI_ASSERT_ALWAYS_GENERAL(aMap!=NULL,User::Panic(KGdiCPicturePanicCategory,KErrNotFound));

   139 	TSize size;

   140 	GetSizeInTwips(size);

   141 	aSize.iWidth = aMap->HorizontalTwipsToPixels(size.iWidth);

   142 	aSize.iHeight = aMap->VerticalTwipsToPixels(size.iHeight);

   143 	}

   145 EXPORT_C void CPicture::SetSizeInPixels(MGraphicsDeviceMap* aMap,const TSize& aSize)

   146 /** Sets the picture's size in pixels.

   148 @param aMap The pixels to twips mapping interface of the graphics device.

   149 @param aSize The size of the picture, in pixels. */

   150 	{

   151 	GDI_ASSERT_ALWAYS_GENERAL(aMap!=NULL,User::Panic(KGdiCPicturePanicCategory,KErrNotFound));

   152 	TSize size;

   153 	size.iWidth = aMap->HorizontalPixelsToTwips(aSize.iWidth);

   154 	size.iHeight = aMap->VerticalPixelsToTwips(aSize.iHeight);

   155 	SetSizeInTwips(size);

   156 	}

   158 EXPORT_C void CPicture::SetScaleFactor(TInt /*aScaleFactorWidth*/,TInt /*aScaleFactorHeight*/)

   159 /** Sets the picture's scale factors.

   161 	@param aScaleFactorWidth The width scale factor, in percent.

   162 	@param aScaleFactorHeight The height scale factor, in percent. */

   163 	{

   164 	}

   166 EXPORT_C TInt CPicture::ScaleFactorWidth() const

   167 /** Gets the picture's width scale factor.

   169 @return The width scale factor, in percent. */

   170 	{

   171 	return 1000; // no scaling

   172 	}

   174 EXPORT_C TInt CPicture::ScaleFactorHeight() const

   175 /** Gets the pictures height scale factor.

   177 @return The height scale factor, in percent. */

   178 	{

   179 	return 1000; // no scaling

   180 	}

   182 EXPORT_C void CPicture::GetCropInTwips(TMargins& aCrop) const

   183 /** Gets the cropping margins of a picture in twips.

   185 These margins are relative to the original unscaled size of the picture.

   187 @param aMargins The cropping margins of the picture, in twips */

   188     {

   189 	aCrop.iLeft=0;

   190 	aCrop.iRight=0;

   191 	aCrop.iTop=0;

   192 	aCrop.iBottom=0;

   193 	}

   195 EXPORT_C void CPicture::SetCropInTwips(const TMargins& /*aMargins*/)

   196 /** Sets the cropping margins of a picture in twips.

   198 These are relative to the original unscaled size of the picture.

   200 @param aMargins The cropping margins of the picture, in twips. */

   201 	{

   202 	}

   205 EXPORT_C TBool CPicture::LineBreakPossible(TUint /*aClass*/,TBool /*aBeforePicture*/,TBool /*aHaveSpaces*/) const

   206 /** States whether a line break is possible, either before or after a picture.

   208 The default implementation returns ETrue, implying that there is a break opportunity

   209 both before and after the picture, whether or not a space is present.

   211 This may be overridden for special types of pictures.

   213 @param aClass The line breaking class of the adjacent character. Line breaking

   214 classes are defined in the header file, tagma.h

   215 @param aBeforePicture ETrue, if the adjacent character is before the picture;

   216 EFalse, if the adjacent character is afterwards.

   217 @param aHaveSpaces ETrue, if spaces occur between the adjacent character and

   218 the picture; EFalse, otherwise.

   219 @return ETrue, if a line break is possible; EFalse, otherwise. */

   220 	{

   221 	return TRUE;

   222 	}

   226 EXPORT_C TBool CPicture::NativePixelSize(TSize&)

   227 /** Derived classes might be implemented as bitmaps, in that case it might

   228 be interesting to now the native pixel size of the bitmap. */

   229 	{

   230 	return EFalse;

   231 	}

   233 EXPORT_C void CPicture::GetSizeInTwips(TSize& aSize) const

   234 /** Gets the picture's size, in twips.

   236 This size is calculated from the original size of the picture, taking cropping

   237 and scaling into account.

   239 @param aSize The size of the picture, in twips. */

   240 	{

   241 	TSize originalSizeInTwips;

   242 	GetOriginalSizeInTwips(originalSizeInTwips);

   243 	TMargins cropInTwips;

   244 	GetCropInTwips(cropInTwips);

   245 	aSize.iWidth = (ScaleFactorWidth()*(originalSizeInTwips.iWidth-cropInTwips.iLeft-cropInTwips.iRight))/1000;

   246 	aSize.iHeight = (ScaleFactorHeight()*(originalSizeInTwips.iHeight-cropInTwips.iTop-cropInTwips.iBottom))/1000;

   247 	}

   249 EXPORT_C void CPicture::SetSizeInTwips(const TSize& aSize)

   250 /** Sets the picture's size, in twips

   252 @param aSize The size of the picture, in twips. */

   253 	{

   254 	TSize originalSizeInTwips;

   255 	GetOriginalSizeInTwips(originalSizeInTwips);

   256 	TMargins cropInTwips;

   257 	GetCropInTwips(cropInTwips);

   258 	TSize size;

   259 	size.iWidth  = originalSizeInTwips.iWidth-cropInTwips.iLeft-cropInTwips.iRight;

   260 	size.iHeight = originalSizeInTwips.iHeight-cropInTwips.iTop-cropInTwips.iBottom;

   261 	TSize scalefactor;

   262 	if(size.iWidth!=0) scalefactor.iWidth=1000*aSize.iWidth/size.iWidth;

   263 	if(size.iHeight!=0) scalefactor.iHeight=1000*aSize.iHeight/size.iHeight;

   264 	SetScaleFactor(scalefactor.iWidth,scalefactor.iHeight);

   265  	}

   267 EXPORT_C void CPicture::AddCropInPixels(MGraphicsDeviceMap* aMap,const TMargins& aMargins)

   268 /** Adds pixel cropping margins to the picture.

   270 @param aMap The pixels to twips mapping interface of the graphics device

   271 @param aMargins The additional pixel cropping margins for the picture, in pixels. */

   272 	{

   273 	GDI_ASSERT_ALWAYS_GENERAL(aMap!=NULL,User::Panic(KGdiCPicturePanicCategory,KErrNotFound));

   274 	TMargins cropInTwips;

   275 	GetCropInTwips(cropInTwips);

   276 	TInt scaleFactorWidth=ScaleFactorWidth();

   277 	if(scaleFactorWidth!=0)

   278 		{

   279 		cropInTwips.iLeft += (1000*aMap->HorizontalPixelsToTwips(aMargins.iLeft))/scaleFactorWidth;

   280 		cropInTwips.iRight += (1000*aMap->HorizontalPixelsToTwips(aMargins.iRight))/scaleFactorWidth;

   281 		}

   282 	TInt scaleFactorHeight=ScaleFactorHeight();

   283 	if(scaleFactorHeight!=0)

   284 		{

   285 		cropInTwips.iTop += (1000*aMap->VerticalPixelsToTwips(aMargins.iTop))/scaleFactorHeight;

   286 		cropInTwips.iBottom += (1000*aMap->VerticalPixelsToTwips(aMargins.iBottom))/scaleFactorHeight;

   287 		}

   288 	SetCropInTwips(cropInTwips);

   289 	}

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--