mrhbits.cpp

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// $Id: mrhbits.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.
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LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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 */
// 

#include "camtypes.h"
#include "mrhbits.h"        // TODO
//#include "view.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "bitmap.h"
//#include "fillattr.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "grndrgn.h"
#include "grndbmp.h"
#include "fillattr2.h"
//#include "docview.h"
//#include "grptrans.h"
//#include "ndcchbmp.h"

// Place any IMPLEMENT type statements here
CC_IMPLEMENT_MEMDUMP(CBMPBits, CC_CLASS_MEMDUMP)

// We want better memory tracking
#define new CAM_DEBUG_NEW

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

>   BOOL CBMPBits::RenderOILBMPToTransparentWhiteRect(BitmapFillAttribute* pRef, BOOL Transparent)
                    
    Author:     Mark_Howitt (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/7/99
    Inputs:     Pointer to an OILBitmap, Flag to say wether or not the Rectangle is to be transparent!
    Outputs:    None
    Returns:    TRUE if Everything ok!
    Purpose:    Front end function for RenderBMPFillAttrToTransparentWhiteRect(BitmapFillAttribute* pRef)
                used if the calling function does not contain a bitmapfillattribute!

********************************************************************************************/
OILBitmap* CBMPBits::RenderOILBMPToTransparentWhiteRect(OILBitmap* pConvBMP, BOOL Transparent, INT32 OutputBPP)
{
    // Check to see if we`ve been given a null bitmap pointer!
    ERROR2IF(pConvBMP == NULL,FALSE,"We`ve got a NULL Bitmap Pointer!! CBMPBits!");

    // Setup All the pointers that are going to be used
    KernelBitmap* pKernel = NULL;
    OILBitmap* pNewBMP = NULL;

    // Create a new KernelBitmap from the OILBitmap so we can create a new BitmapFillAttribute!
    pKernel = new KernelBitmap(pConvBMP);
    
    if(pKernel != NULL)
    {
        pNewBMP = RenderKernelBMPToTransparentWhiteRect(pKernel, Transparent, OutputBPP);

        delete pKernel;
        pKernel = NULL;
    }

    // Return the new Bitmap
    return pNewBMP;
}

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

>   BOOL CBMPBits::RenderKernelBMPToTransparentWhiteRect(BitmapFillAttribute* pRef)
                    
    Author:     Mark_Howitt (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/7/99
    Inputs:     Pointer to an KernelBitmap, Flag to say wether or not the Rectangle is to be transparent!
    Outputs:    None
    Returns:    TRUE if Everything ok!
    Purpose:    Front end function for RenderBMPFillAttrToTransparentWhiteRect(BitmapFillAttribute* pRef)
                used if the calling function does not contain a bitmapfillattribute!

********************************************************************************************/
OILBitmap* CBMPBits::RenderKernelBMPToTransparentWhiteRect(KernelBitmap* pConvBMP, BOOL Transparent, INT32 OutputBPP)
{
    // Check to see if we`ve been given a null bitmap pointer!
    ERROR2IF(pConvBMP == NULL,FALSE,"We`ve got a NULL Bitmap Pointer!! CBMPBits!");

    // Setup All the pointers that are going to be used
    OILBitmap* pNewBMP = NULL;
    BitmapFillAttribute* pRef = NULL;

    // Create the new BitmapFill Attribute
    pRef = new BitmapFillAttribute;

    if(pRef != NULL)
    {
        // make it reference the Passed in OILBitmap!
        pRef->AttachBitmap(pConvBMP);

        // Get the Width and Height of the Bitmap
        UINT32 Width = pConvBMP->GetWidth();
        UINT32 Height = pConvBMP->GetHeight();

        // Set the Fill Coordinates from the width and height variables
        DocCoord Start(0, 0);
        DocCoord End(Width * 750, 0);
        DocCoord End2(0, Height * 750);

        pRef->SetStartPoint(&Start);
        pRef->SetEndPoint(&End);
        pRef->SetEndPoint2(&End2);

        // Set the tessalation to repeating
        pRef->SetTesselation(2);

        // Now call the RenderBMPFillAttrToTransparentWhiteRect function with our new
        // BitmapFillAttribute!
        pNewBMP = RenderBMPFillAttrToTransparentWhiteRect(pRef,Transparent,OutputBPP);
    }

    // Delete everything that we created!
    if(pRef != NULL)
    {
        pRef->DetachBitmap();
        delete pRef;
        pRef = NULL;
    }

    // Return the new Bitmap
    return pNewBMP;
}

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

>   BOOL CBMPBits::RenderBMPFillAttrToTransparentWhiteRect(BitmapFillAttribute* pRef)
                    
    Author:     Mark_Howitt (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/7/99
    Inputs:     A Pointer to a Bitmap Reference, Flag to say wether or not the Rectangle is to be transparent!
    Outputs:    None
    Returns:    TRUE if Everything ok!
    Purpose:    Renders a Any Bitmap onto a 32bit Transparent White Rectangle of size
                equal to bitmap referenced. This is mainly used just before a 32bit alpha channeled
                bitmap is rendered into a lower dpi region. It stops the effect of rendering 
                solid shapes on a black background.

********************************************************************************************/
OILBitmap* CBMPBits::RenderBMPFillAttrToTransparentWhiteRect(BitmapFillAttribute* pRef, BOOL Transparent, INT32 OutputBPP)
{
    ERROR2IF(pRef == NULL, FALSE, "Where`s the Bitmap Reference Pointer? {DIBUtil}");

    // Ok, we`ve got a 32Bit BMP so lets setup a render region!
    View*   pView = View::GetCurrent();
    Matrix  Mat(1,0,0,1,0,0);
    FIXED16 Scale = 1;
    double  DPI = 96;
    DocRect RenderRect;
    OILBitmap* pNewBMP = NULL;

    // Get the info from the bitmap we`re trying to display in the gallery!
//  LPBITMAPINFOHEADER pInfo = (pRef->GetBitmap()->ActualBitmap)->GetBitmapInfoHeader();

    // Setup the DocRect with the Start and End points of the bitmap fill
    RenderRect.lo.x = pRef->GetStartPoint()->x;
    RenderRect.lo.y = pRef->GetStartPoint()->y;
    RenderRect.hi.x = pRef->GetEndPoint()->x;
    RenderRect.hi.y = pRef->GetEndPoint2()->y;

    // Create a new GRenderBitmap region
    GRenderBitmap* pGBMP = new GRenderBitmap(RenderRect, Mat, Scale, OutputBPP, DPI, FALSE, 0, NULL, TRUE);

    if(pGBMP != NULL && pView != NULL)
    {
        // Set the flag to say that we want to use the BiCompression Field for transparencies!
        pGBMP->m_DoCompression = TRUE;
        
        // Create a new path which is the same size as the bitmap which will fill it!
        Path BMPPath;
        BMPPath.Initialise();
        BMPPath.CreatePathFromDocRect(&RenderRect);

        // Create a new FlatFillAttr and set it to white
        FlatFillAttribute* pWhiteFill = new FlatFillAttribute;
        DocColour White(COLOUR_WHITE);
        pWhiteFill->SetStartColour(&White);

        // Create a new StrokeColourAttr and set that also to white
        StrokeColourAttribute* pStrokeColour = new StrokeColourAttribute;
        pStrokeColour->SetStartColour(&White);

        // Create a new stroketransattr and set it to fully transparent
        StrokeTranspAttribute* pStrokeTrans = NULL;
        FlatTranspFillAttribute* pTransFill = NULL;

        if(Transparent)
        {
            pStrokeTrans = new StrokeTranspAttribute(0xFF);
            pTransFill = new FlatTranspFillAttribute(0xFF);
        }
        else
        {
            pStrokeTrans = new StrokeTranspAttribute(0x00);
            pTransFill = new FlatTranspFillAttribute(0x00);
        }

        // Make sure everything got setup alright and then proceed!
        if( pWhiteFill != NULL && pStrokeColour != NULL &&
            pStrokeTrans != NULL && pTransFill != NULL)
        {
            if (!pGBMP->AttachDevice(pView, NULL, NULL))
            {
                ERROR3("Cannot attatch devices");
            }

            // Initialize the Render region
            pGBMP->InitDevice();

            // Save the current context
            pGBMP->SaveContext();

            // Start the render process
            pGBMP->StartRender();

            pGBMP->SetLineColour(COLOUR_NONE);
            pGBMP->SetLineWidth(0);

            // Set all the attributes we`ve just created
            pTransFill->Render(pGBMP);
            pStrokeTrans->Render(pGBMP);
            pWhiteFill->Render(pGBMP);
            pStrokeColour->Render(pGBMP);

            // Render a rectangle with the current attributes
            pGBMP->DrawRect(&RenderRect);

            // Now Render the Bitmap using no Flat Transparency, else it all comes out blank!           
            UINT32 NoTrans = 0x00;
            pTransFill->SetStartTransp(&NoTrans);
            pTransFill->Render(pGBMP);

            // Render the bitmap onto the white rectangle
            pGBMP->RenderBitmapFill(&BMPPath,pRef);

            // Finished so stop rendering
            pGBMP->StopRender();

            // Restore the old context
            pGBMP->RestoreContext();

            // WinBM Now needs to be setup with the newly created bitmap
            pNewBMP = OILBitmap::Attach(pGBMP->ExtractBitmapCopy(),TRUE);
        }
        else
        {
            ERROR3("Can not display 32bit Alpha channel bitmap!!!");
        }

        // Now delete everything!
        if(pGBMP != NULL)
        {
            delete pGBMP;
            pGBMP = NULL;
        }

        if(pStrokeColour != NULL)
        {
            delete pStrokeColour;
            pStrokeColour = NULL;
        }

        if(pStrokeTrans != NULL)
        {
            delete pStrokeTrans;
            pStrokeTrans = NULL;
        }

        if(pWhiteFill != NULL)
        {
            delete pWhiteFill;
            pWhiteFill = NULL;
        }

        if(pTransFill != NULL)
        {
            delete pTransFill;
            pTransFill = NULL;
        }
    }

    // Return the new Bitmap!
    return pNewBMP;
}

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

>   BOOL CBMPBits::RenderSelectionToBMP(SelRange* pSel, INT32 OutputBPP, BOOL Transparent)
                    
    Author:     Mark_Howitt (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/8/99
    Inputs:     Flag to say wether or not the Rectangle is to be transparent and the required
                output depth. Pointer to the current selection of nodes.
    Returns:    The newly rendered BMP or NULL if something went bang!
    Purpose:    Renders any selection of nodes into a BMP copy.

********************************************************************************************/
OILBitmap* CBMPBits::RenderSelectionToBMP(SelRange* pSel, INT32 OutputBPP, BOOL Transparent, DocRect *pClip, double DPI)
{
    // Check to see if we have a valid selection pointer!
    ERROR2IF(pSel == NULL,NULL,"Recieved a NULL Selection Range Pointer in CBMPBits!");

    // Ok, Lets setup a few variables need to create the new BMP
    View*   pView = View::GetCurrent();
    Matrix  Mat(1,0,0,1,0,0);
    FIXED16 Scale = 1;
//  double  DPI = 96;
    OILBitmap* pNewBMP = NULL;

    // Get the current DocRect of the selection!
    // but use the passed in clip region if it is already calculated
    DocRect RenderRect = pClip ? *pClip : pSel->GetBoundingRect();

    // Check to see if we`ve got an empty rect if so then return NULL!
    ERROR2IF(RenderRect.IsEmpty(),NULL,"We`ve got an empty DocRect in the selection! (CBMPBits)");

    // Create a new GRenderBitmap region
    GRenderBitmap* pGBMP = new GRenderBitmap(RenderRect, Mat, Scale, OutputBPP, DPI, FALSE, 0, NULL, TRUE);

    // Check to see if the Render Region is valid!
    ERROR2IF(pGBMP == NULL,NULL,"Failed to create a GRenderBitmap in CBMPBits!");

    if (Transparent)
    {
        // Set the flag to say that we want to use the BiCompression Field for transparencies!
        pGBMP->m_DoCompression = TRUE;
    }

    // Start to render into region!
    if(!pGBMP->AttachDevice(pView, NULL, NULL))
    {
        ERROR3("Cannot attatch devices");
        
        delete pGBMP;
        pGBMP = NULL;
        
        return NULL;
    }

    pGBMP->InitDevice();
    pGBMP->InitAttributes();
    pGBMP->RRQuality.SetQuality(QUALITY_MAX);
    pGBMP->SetQualityLevel();
    pGBMP->SetLineAttributes();
    pGBMP->SetFillAttributes();

    pGBMP->StartRender();

    Node* pCurrent = pSel->FindFirst(FALSE);

    while(pCurrent != NULL)
    {
        // Render all it's child nodes using the following function
        pGBMP->RenderTreeNoCache(pCurrent);

        pCurrent = pSel->FindNext(pCurrent);
    }

    // Rendered everything so stop the render process.
    pGBMP->StopRender();

    // Now Extract the bitmap!
    pNewBMP = OILBitmap::Attach(pGBMP->ExtractBitmapCopy(),TRUE);

    // Delete all the new`s that have happened!
    if(pGBMP != NULL)
    {
        delete pGBMP;
        pGBMP = NULL;
    }
    
    // If everything went ok then return the pointer to the BMP!
    return pNewBMP;
}

---