cdrbitm.cpp

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// $Id: cdrbitm.cpp 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

This file is part of Xara LX.

Xara LX is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 2 as published
by the Free Software Foundation.

Xara LX and its component source files are distributed in the hope
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.

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Franklin St, Fifth Floor, Boston, MA  02110-1301 USA


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-----------------

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License described above, Xara Group Ltd grants to you certain additional
rights. 

The additional rights are to use, modify, and distribute the software
together with the wxWidgets library, the wxXtra library, and the "CDraw"
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----------------

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=================================XARAHEADEREND============================
 */
// *********Bitmaps for the CDR file filter

/*
*/

#include "camtypes.h"
#include "cdrbitm.h"
#include "cdrform.h"
//#include "dibutil.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "wbitmap.h"
#include "cdrfiltr.h"

DECLARE_SOURCE("$Revision: 1282 $");

#define new CAM_DEBUG_NEW

// Note: As this is a winoil file, no use of the CDRDATA_* functions is made.
// be aware of converting byte orders!

#define PROGRESS_BLOCKSIZE 2048

/********************************************************************************************

>   static KernelBitmap *CDRBitmap::ConvertPattern(RIFFFile *RIFF, DWORD *Reference, CDRFilter *C)

    Author:     Ben_Summers (Xara Group Ltd) <camelotdev@xara.com>
    Created:    10/04/95
    Inputs:     RIFFFile with the chunk containing the pattern current, a pointer to the
                reference number of this bitmap to fill in
    Returns:    a kernel bitmap or zero
    Purpose:    Convert a CDR pattern
    SeeAlso:    CDRFilter

********************************************************************************************/

KernelBitmap *CDRBitmap::ConvertPattern(RIFFFile *RIFF, DWORD *Reference, CDRFilter *C)
{
TRACEUSER( "Ben", _T("Converting pattern\n"));
    // check various things
    ERROR3IF(RIFF->GetObjChunkType() != cdrT_bmpf, "ConvertPattern called for non-pattern RIFF chunk");
    ERROR3IF(RIFF->GetObjType() != RIFFOBJECTTYPE_CHUNK, "ConvertPattern called for a non-chunk RIFF object");

    if(RIFF->GetObjSize() < sizeof(cdrfPatternBitmapHeader))
    {
        // Empty 'if' statement
        // Anyone's guess if this was intended
        // Changed to this form to remove a compiler warning
        // Markn 19/3/99
    }

    // get some data from the RIFF file
    cdrfPatternBitmapHeader Hdr;

    // get the header from offset 0
    if(!RIFF->GetChunkData((ADDR)&Hdr, sizeof(Hdr), 0))
        return 0;

    // check the header...
    if(((Hdr.SizeX * Hdr.SizeY) / 8) > Hdr.DataSize || Hdr.DataSize > (DWORD)RIFF->GetObjSize())
    {
TRACEUSER( "Ben", _T("Header in CDR pattern doesn't check out\n"));
        return 0;
    }

    // store the reference
TRACEUSER( "Ben", _T("Pattern reference = %X\n"), Hdr.Reference);
    *Reference = Hdr.Reference;

    // OK, create a bitmap...
    // it's always a 1 bpp bitmap
    LPBYTE Image;
    LPBITMAPINFO ImageHeader;
    ImageHeader = AllocDIB(Hdr.SizeX, Hdr.SizeX, 1, &Image);

    if(ImageHeader == 0)
        return 0;

    // check and then fill in the image data
    if(ImageHeader->bmiHeader.biSizeImage < (Hdr.DataSize - (sizeof(DWORD) * 3)))
    {
        FreeDIB(ImageHeader, Image);
        return 0;
    }

    // set some palette data
    ImageHeader->bmiColors[0].rgbBlue = 0;
    ImageHeader->bmiColors[0].rgbGreen = 0;
    ImageHeader->bmiColors[0].rgbRed = 0;
    ImageHeader->bmiColors[0].rgbReserved = 0;
    ImageHeader->bmiColors[1].rgbBlue = 0xff;
    ImageHeader->bmiColors[1].rgbGreen = 0xff;
    ImageHeader->bmiColors[1].rgbRed = 0xff;
    ImageHeader->bmiColors[1].rgbReserved = 0;

    // corel bitmaps align the scanlines to the nearest byte, not the nearest word
    // how long is a corel scanline
    INT32 SourceScanlineLength = (Hdr.SizeX + 7)    / 8;
    
    // how long is the destination scanline?
    INT32 DestScanlineLength = ((Hdr.SizeX + 31) / 32) * 4;

    // sanity check
    ERROR3IF(DestScanlineLength < SourceScanlineLength, "Problem with scanline length calculations");
    
    // set up offsets of current line
    INT32 SourceOffset = Hdr.DataOffset + (sizeof(DWORD) * 3);
    INT32 DestOffset = ImageHeader->bmiHeader.biSizeImage - DestScanlineLength;
    
    // grab the image data, backwards
    INT32 Line;
    for(Line = 0; Line < (INT32)Hdr.SizeY; Line++)
    {
        if(!RIFF->GetChunkData(((ADDR)Image) + DestOffset,
                SourceScanlineLength, SourceOffset))
        {
            FreeDIB(ImageHeader, Image);
            return 0;
        }

        SourceOffset += SourceScanlineLength;
        DestOffset -= DestScanlineLength;

        if((Line & 0xf) == 0)
            C->UpdateProgress(TRUE);
    }

    // OK, it's all filled in. Create a KernelBitmap from it.
    // first of all, get ourself a nice OIL bitmap
    WinBitmap *WinB = new WinBitmap(ImageHeader, Image);

    if(WinB == 0)
    {
        FreeDIB(ImageHeader, Image);
        return 0;
    }

    // and now get a KernelBitmap
    KernelBitmap *KerB = new KernelBitmap(WinB);

    if(KerB == 0)
    {
        delete WinB;
        return 0;
    }

    // and that's it for now, folks
    return KerB;
}


/********************************************************************************************

>   static KernelBitmap *CDRBitmap::ConvertBitmap5(RIFFFile *RIFF, DWORD *Reference, CDRFilter *C)

    Author:     Ben_Summers (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/04/95
    Inputs:     RIFFFile with the chunk containing the bitmap current, a pointer to the
                reference number of this bitmap to fill in
    Returns:    a kernel bitmap or zero
    Purpose:    Convert a CDR 5 bitmap
    SeeAlso:    CDRFilter

********************************************************************************************/

KernelBitmap *CDRBitmap::ConvertBitmap5(RIFFFile *RIFF, DWORD *Reference, CDRFilter *C)
{
    // check various things
    ERROR3IF(RIFF->GetObjChunkType() != cdrT_bmp, "ConvertBitmap called for non-bitmap RIFF chunk");
    ERROR3IF(RIFF->GetObjType() != RIFFOBJECTTYPE_CHUNK, "ConvertBitmap called for a non-chunk RIFF object");

    if(RIFF->GetObjSize() < sizeof(cdrfBitmapHeader))
    {
        // Empty 'if' statement
        // Anyone's guess if this was intended
        // Changed to this form to remove a compiler warning
        // Markn 19/3/99
    }

    // get some data from the RIFF file
    cdrfBitmapHeader Hdr;

    // get the header from offset 0
    if(!RIFF->GetChunkData((ADDR)&Hdr, sizeof(Hdr), 0))
        return 0;

    // check the header...
    UINT32 BitmapSize = DIBUtil::ScanlineSize( Hdr.SizeX, Hdr.Depth ) * Hdr.SizeY;

//  if((((Hdr.SizeX * Hdr.SizeY) / Hdr.Depth) + Hdr.ImageOffset - cdrfBitmapHeaderImageOffsetCorrect)
//                  > (DWORD)RIFF->GetObjSize()
//                  || Hdr.Depth < 1 || Hdr.Depth > 32)
    if( (BitmapSize + Hdr.ImageOffset - cdrfBitmapHeaderImageOffsetCorrect)
                    > (DWORD)RIFF->GetObjSize()
                    || Hdr.Depth < 1 || Hdr.Depth > 32)
    {
TRACEUSER( "Ben", _T("Header in CDR bitmap doesn't check out\n"));
        return 0;
    }

    // store the reference
TRACEUSER( "Ben", _T("Bitmap reference = %X\n"), Hdr.Reference);
    *Reference = Hdr.Reference;

    // find a plausible number of palette entries...
    INT32 NPaletteEntries = Hdr.NPaletteEntries;

    if(NPaletteEntries > (1 << Hdr.Depth))
        NPaletteEntries = (1 << Hdr.Depth);

    if(NPaletteEntries < 0)
        NPaletteEntries = 0;    

    // is it a greyscale type bitmap?
    BOOL Greyscale = FALSE;
    if(Hdr.Depth <= 8 && Hdr.ImageType == cdrfBITMAPTYPE_GREYSCALE)
        Greyscale = TRUE;

    // OK, create a bitmap...
    LPBYTE Image;
    LPBITMAPINFO ImageHeader;
    ImageHeader = AllocDIB(Hdr.SizeX, Hdr.SizeY, Hdr.Depth, &Image);

    if(ImageHeader == 0)
        return 0;

    // right then, sort out that there palette if we really want to
    if(Hdr.Depth <= 8)
    {
        if(Greyscale)
        {   // it's a greyscale image - create a nice palette
            UINT32 Entries = 1 << Hdr.Depth;
            UINT32 Inc = 256 / Entries;
            UINT32 Value = 0;
            UINT32 l;

            for(l = 0; l < Entries; l++)
            {
                ImageHeader->bmiColors[l].rgbRed = Value;
                ImageHeader->bmiColors[l].rgbGreen = Value;
                ImageHeader->bmiColors[l].rgbBlue = Value;
                ImageHeader->bmiColors[l].rgbReserved = 0;

                Value += Inc;
            }
        }
        else
        {   // it's a colour image - load it's palette from the file
            // load the palette data into the palette in the created bitmap
            if(!RIFF->GetChunkData((ADDR)ImageHeader->bmiColors,
                    sizeof(cdrfBitmapPaletteEntry) * NPaletteEntries, sizeof(cdrfBitmapHeader)))
            {
                FreeDIB(ImageHeader, Image);
                return 0;
            }

            // run through the loaded entries expanding them to DIB entries
            INT32 l;
            cdrfBitmapPaletteEntry *Palette = (cdrfBitmapPaletteEntry *)ImageHeader->bmiColors;
            cdrfBitmapPaletteEntry TempCol;
            for(l = NPaletteEntries - 1; l >= 0; l--)
            {
                TempCol = Palette[l];
                ImageHeader->bmiColors[l].rgbRed = TempCol.Red;
                ImageHeader->bmiColors[l].rgbGreen = TempCol.Green;
                ImageHeader->bmiColors[l].rgbBlue = TempCol.Blue;
                ImageHeader->bmiColors[l].rgbReserved = 0;
            }

            if (Hdr.Depth == 1)
            {
                // Ensure the palette entries are not the same!
                if (ImageHeader->bmiColors[0].rgbRed == ImageHeader->bmiColors[1].rgbRed &&
                    ImageHeader->bmiColors[0].rgbGreen == ImageHeader->bmiColors[1].rgbGreen &&
                    ImageHeader->bmiColors[0].rgbBlue == ImageHeader->bmiColors[1].rgbBlue)
                {
                    ImageHeader->bmiColors[0].rgbRed = 0x00;
                    ImageHeader->bmiColors[0].rgbGreen = 0x00;
                    ImageHeader->bmiColors[0].rgbBlue = 0x00;

                    ImageHeader->bmiColors[1].rgbRed = 0xff;
                    ImageHeader->bmiColors[1].rgbGreen = 0xff;
                    ImageHeader->bmiColors[1].rgbBlue = 0xff;
                }
            }
        }
    }

    // work out the scanline lengths (aligns to 4 bytes)
    INT32 RawScanlineLength = Hdr.SizeX * Hdr.Depth;    // in bits
    INT32 ScanlineLength = DIBUtil::ScanlineSize( Hdr.SizeX, Hdr.Depth ); // in bytes 
    //INT32 ScanlineLength = ((RawScanlineLength + 31) / 32) * 4;

    // set up offsets of current line
    INT32 SourceOffset;
    
    if(Greyscale)
    {
        SourceOffset = cdrfBitmapGreyscaleImageStart;
    }
    else
    {
        SourceOffset = sizeof(cdrfBitmapHeader) + Hdr.ImageOffset - cdrfBitmapHeaderImageOffsetCorrect;
    }

    // grab the image data, it's in the same sort of format as a DIB file. Helpfully
    INT32 SizeLeftToGet = ScanlineLength * Hdr.SizeY;
    INT32 Size, Got = 0;

    while(SizeLeftToGet > 0)
    {
        if(SizeLeftToGet > PROGRESS_BLOCKSIZE)
            Size = PROGRESS_BLOCKSIZE;
        else
            Size = SizeLeftToGet;
        
        if(!RIFF->GetChunkData((ADDR)Image + Got, Size, SourceOffset + Got))
        {
            FreeDIB(ImageHeader, Image);
            return 0;
        }
    
        SizeLeftToGet -= Size;
        Got += Size;

        C->UpdateProgress(TRUE);
    }

    // OK, it's all filled in. Create a KernelBitmap from it.
    // first of all, get ourself a nice OIL bitmap
    WinBitmap *WinB = new WinBitmap(ImageHeader, Image);

    if(WinB == 0)
    {
        FreeDIB(ImageHeader, Image);
        return 0;
    }

    // get it to cache some interesting stuff
    WinB->CacheGeometry();

    // and now get a KernelBitmap
    KernelBitmap *KerB = new KernelBitmap(WinB);

    if(KerB == 0)
    {
        delete WinB;
        return 0;
    }

    // and that's it for now, folks
    return KerB;
}


/********************************************************************************************

>   static KernelBitmap *CDRBitmap::ConvertBitmap4(RIFFFile *RIFF, DWORD *Reference, CDRFilter *C)

    Author:     Ben_Summers (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/04/95
    Inputs:     RIFFFile with the chunk containing the bitmap current, a pointer to the
                reference number of this bitmap to fill in
    Returns:    a kernel bitmap or zero
    Purpose:    Convert a CDR 4 bitmap
    SeeAlso:    CDRFilter

********************************************************************************************/

KernelBitmap *CDRBitmap::ConvertBitmap4(RIFFFile *RIFF, DWORD *Reference, CDRFilter *C)
{
    // check various things
    ERROR3IF(RIFF->GetObjChunkType() != cdrT_bmp, "ConvertBitmap called for non-bitmap RIFF chunk");
    ERROR3IF(RIFF->GetObjType() != RIFFOBJECTTYPE_CHUNK, "ConvertBitmap called for a non-chunk RIFF object");

    if(RIFF->GetObjSize() < sizeof(cdrfBitmapHeader4))
    {
        // Empty 'if' statement
        // Anyone's guess if this was intended
        // Changed to this form to remove a compiler warning
        // Markn 19/3/99
    }

    // get some data from the RIFF file
    cdrfBitmapHeader4 Hdr;

    // get the header from offset 0
    if(!RIFF->GetChunkData((ADDR)&Hdr, sizeof(Hdr), 0))
        return 0;

    // check the header...
    if((((Hdr.SizeX * Hdr.SizeY) / Hdr.Depth) + Hdr.ImageOffset - cdrfBitmapHeaderImageOffsetCorrect)
                    > (DWORD)RIFF->GetObjSize()
                    || Hdr.Depth < 1 || Hdr.Depth > 32)
    {
TRACEUSER( "Ben", _T("Header in CDR bitmap doesn't check out\n"));
        return 0;
    }

    // store the reference
TRACEUSER( "Ben", _T("Bitmap reference = %X\n"), Hdr.Reference);
    *Reference = Hdr.Reference;

    // find a plausible number of palette entries...
    INT32 NPaletteEntries = Hdr.NPaletteEntries;

    if(NPaletteEntries > (1 << Hdr.Depth))
        NPaletteEntries = (1 << Hdr.Depth);

    if(NPaletteEntries < 0)
        NPaletteEntries = 0;    

    // is it a greyscale type bitmap?
    BOOL Greyscale = FALSE;
//  if(Hdr.Depth <= 8 && Hdr.ImageType == cdrfBITMAPTYPE_GREYSCALE)
//      Greyscale = TRUE;

    // OK, create a bitmap...
    LPBYTE Image;
    LPBITMAPINFO ImageHeader;
    ImageHeader = AllocDIB(Hdr.SizeX, Hdr.SizeY, Hdr.Depth, &Image);

    if(ImageHeader == 0)
        return 0;

    // right then, sort out that there palette if we really want to
    if(Hdr.Depth <= 8)
    {
        if(Greyscale)
        {   // it's a greyscale image - create a nice palette
            UINT32 Entries = 1 << Hdr.Depth;
            UINT32 Inc = 256 / Entries;
            UINT32 Value = 0;
            UINT32 l;

            for(l = 0; l < Entries; l++)
            {
                ImageHeader->bmiColors[l].rgbRed = Value;
                ImageHeader->bmiColors[l].rgbGreen = Value;
                ImageHeader->bmiColors[l].rgbBlue = Value;
                ImageHeader->bmiColors[l].rgbReserved = 0;

                Value += Inc;
            }
        }
        else
        {   // it's a colour image - load it's palette from the file
            // load the palette data into the palette in the created bitmap
            if(!RIFF->GetChunkData((ADDR)ImageHeader->bmiColors,
                    sizeof(cdrfBitmapPaletteEntry4) * NPaletteEntries, sizeof(cdrfBitmapHeader4)))
            {
                FreeDIB(ImageHeader, Image);
                return 0;
            }
        }
    }

    // work out the scanline lengths (aligns to 4 bytes)
    INT32 RawScanlineLength = Hdr.SizeX * Hdr.Depth;    // in bits
    INT32 ScanlineLength = ((RawScanlineLength + 31) / 32) * 4;

    // set up offsets of current line
    INT32 SourceOffset;
    
    if(Greyscale)
    {
        SourceOffset = cdrfBitmapGreyscaleImageStart;
    }
    else
    {
        SourceOffset = sizeof(cdrfBitmapHeader) + Hdr.ImageOffset - cdrfBitmapHeaderImageOffsetCorrect;
    }

    // grab the image data, it's in the same sort of format as a DIB file. Helpfully
//  if(!RIFF->GetChunkData((ADDR)Image, ScanlineLength * Hdr.SizeY, SourceOffset))
//  {
//      FreeDIB(ImageHeader, Image);
//      return 0;
//  }
    INT32 SizeLeftToGet = ScanlineLength * Hdr.SizeY;
    INT32 Size, Got = 0;

    while(SizeLeftToGet > 0)
    {
        if(SizeLeftToGet > PROGRESS_BLOCKSIZE)
            Size = PROGRESS_BLOCKSIZE;
        else
            Size = SizeLeftToGet;
        
        if(!RIFF->GetChunkData((ADDR)Image + Got, Size, SourceOffset + Got))
        {
            FreeDIB(ImageHeader, Image);
            return 0;
        }
    
        SizeLeftToGet -= Size;
        Got += Size;

        C->UpdateProgress(TRUE);
    }

    // OK, it's all filled in. Create a KernelBitmap from it.
    // first of all, get ourself a nice OIL bitmap
    WinBitmap *WinB = new WinBitmap(ImageHeader, Image);

    if(WinB == 0)
    {
        FreeDIB(ImageHeader, Image);
        return 0;
    }

    // get it to cache some interesting stuff
    WinB->CacheGeometry();

    // and now get a KernelBitmap
    KernelBitmap *KerB = new KernelBitmap(WinB);

    if(KerB == 0)
    {
        delete WinB;
        return 0;
    }

    // and that's it for now, folks
    return KerB;
}



/********************************************************************************************

>   static KernelBitmap *GenerateBitmap(Node *Objects, DocRect *BBox, Document *pDocument)

    Author:     Ben_Summers (Xara Group Ltd) <camelotdev@xara.com>
    Created:    17/05/95
    Inputs:     pointer to some objects, a bounding box to render, and a document to use
                the default attributes of
    Returns:    a kernel bitmap or zero
    Purpose:    Generate a bitmap of some objects.
    SeeAlso:    CDRFilter

********************************************************************************************/

KernelBitmap *GenerateBitmap(Node *Objects, DocRect *BBox, Document *pDocument)
{
    return 0;
}

---