/*
* Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: Converts color icon to CFbsBitmap
*
*/
#include <gdi.h>
#include <fbs.h>
#include "CSatSColorIconConverter.h"
#include "TSatBitOP.h"
#include "SatLog.h"
const TInt KHeaderSize = 6;
const TInt KClutEntrySize = 3;
const TInt KRedShift = 16;
const TInt KGreenShift = 8;
const TInt KPixelSize = 8;
// ======== MEMBER FUNCTIONS ========
// -----------------------------------------------------------------------------
// CSatSColorIconConverter::CSatSColorIconConverter
// C++ default constructor can NOT contain any code, that
// might leave.
// -----------------------------------------------------------------------------
//
CSatSColorIconConverter::CSatSColorIconConverter()
{
LOG( SIMPLE, "SATENGINE: \
CSatSColorIconConverter::CSatSColorIconConverter calling - exiting" )
}
// -----------------------------------------------------------------------------
// CSatSColorIconConverter::CheckDataValidityL
// (other items were commented in a header).
// -----------------------------------------------------------------------------
//
void CSatSColorIconConverter::CheckDataValidityL(
const TDesC8& aData ) const
{
LOG( SIMPLE,
"SATENGINE: CSatSColorIconConverter::CheckDataValidityL calling" )
TInt err( KErrNone );
const TInt dataLength( aData.Length() );
if ( dataLength >= KHeaderSize )
{
LOG( SIMPLE, "SATENGINE: CSatSColorIconConverter::CheckDataValidityL \
dataLength bigger than KHeaderSize" )
const TInt width( aData[0] );
const TInt height( aData[1] );
const TInt bpp( aData[2] );
if ( dataLength < ( width * height * bpp / KPixelSize + KHeaderSize ) )
{
LOG( SIMPLE, "SATENGINE: CSatSColorIconConverter::\
CheckDataValidityL KErrCorrupt" )
err = KErrCorrupt;
}
}
else
{
LOG( SIMPLE, "SATENGINE: CSatSColorIconConverter::CheckDataValidityL \
dataLength less than KHeaderSize" )
err = KErrCorrupt;
}
User::LeaveIfError( err );
LOG( SIMPLE,
"SATENGINE: CSatSColorIconConverter::CheckDataValidityL exiting" )
}
// -----------------------------------------------------------------------------
// CSatSColorIconConverter::CheckClutValidityL
// (other items were commented in a header).
// -----------------------------------------------------------------------------
//
void CSatSColorIconConverter::CheckClutValidityL(
const TDesC8& aData,
const TDesC8& aClut ) const
{
LOG( SIMPLE,
"SATENGINE: CSatSColorIconConverter::CheckClutValidityL calling" )
const TInt clutEntries( aData[3] );
const TInt expectedClutLength( clutEntries * KClutEntrySize );
if ( aClut.Length() < expectedClutLength )
{
LOG( SIMPLE,
"SATENGINE: CSatSColorIconConverter::CheckClutValidityL KErrCorrupt" )
User::Leave( KErrCorrupt );
}
LOG( SIMPLE,
"SATENGINE: CSatSColorIconConverter::CheckClutValidityL exiting" )
}
// -----------------------------------------------------------------------------
// CSatSColorIconConverter::ConvertL
// Converts color icon to CFbsBitamp.
//
// aData has following format( ETSI TS 131 102 V4.10.0 ).
// 1 byte: Icon width
// 2 byte: Icon height
// 3 byte: Bits per raster image point. (1 to 8)
// 7 to end byte: Image body.
//
// The image body has following format.
//
// Byte 1 Byte 2
// 1001 1100 1110 1100 ....
//
// If the Bits per pixel ratio is 3 then
// 1st raster point CLUT reference is 100
// 2nd ------------ "" -------------- 111
// 3rd ------------ "" -------------- 001
// 4th ------------ "" -------------- 110
// etc...
//
// One CLUT entry is 3 bytes and each byte defines the intensity of color (RGB).
// The CLUT is in following format:
// 1st CLUT entry
// 1 byte Red color intensity
// 2 byte Green color intensity
// 3 byte Blue color intensity
// 2nd CLUT entry
// 4 byte Red color intensity
// 5 byte Green color intensity
// 6 byte Blue color intensity
// (other items were commented in a header).
// -----------------------------------------------------------------------------
//
CFbsBitmap* CSatSColorIconConverter::ConvertL(
const TDesC8& aData,
const TDesC8& aClut ) const
{
LOG( SIMPLE, "SATENGINE: CSatSColorIconConverter::ConvertL calling" )
// Check that data is valid.
CheckDataValidityL( aData );
CheckClutValidityL( aData, aClut );
const TUint8 width( aData[0] );
const TUint8 height( aData[1] );
// Create the bitmap
CFbsBitmap* bitmap = CreateBitmapL( width, height, EColor16M );
// Separate the header from image body.
const TPtrC8 iconData(
aData.Mid( KHeaderSize, aData.Length() - KHeaderSize ) );
const TUint8 bpp( aData[2] );
TBitmapUtil bitmapUtil( bitmap );
bitmapUtil.Begin( TPoint( 0, 0 ) );
TInt x(0);
TInt y(0);
// Go through the image body to convert the data.
for ( y = 0; y < height; y++ )
{
bitmapUtil.SetPos( TPoint( 0, y ) );
for ( x = 0; x < width; x++ )
{
// Calculate the starting bit index of current pixel
// location.
const TInt startBit( ( y * width + x ) * bpp );
// Get the entry from icon data.
const TUint8 clutReference(
TSatBitOP::ExtractBits( startBit, bpp, iconData ) );
// clut entry is 3 bytes long and therefore the start of
// the clut entry is multiplied with 3.
const TInt clutEntryPoint( clutReference * KClutEntrySize );
// Take the color intensities from clut entry.
const TUint red( aClut[clutEntryPoint] );
const TUint green( aClut[clutEntryPoint + 1] );
const TUint blue( aClut[clutEntryPoint + 2] );
// Cannot use TRgb here, because of different interpration of
// r,g,b order than bitmapUtil.
bitmapUtil.SetPixel(
red << KRedShift | green << KGreenShift | blue );
bitmapUtil.IncXPos();
}
}
LOG3( SIMPLE,"SATENGINE: CSatSColorIconConverter::ConvertL, \
x: %d, y: %d", x, y )
bitmapUtil.End();
LOG( SIMPLE, "SATENGINE: CSatSColorIconConverter::ConvertL exiting" )
return bitmap;
}