grndbrsh.h

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// $Id: grndbrsh.h 1755 2006-09-16 12:00:36Z alex $
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 */

//GRenderBrush - render region used for drawing brush strokes



#include "grndrgn.h"
#include "grnddib.h"

class DocRect;

#ifndef INC_GRNDBRSH
#define INC_GRNDBRSH

#include "grndrgn.h"

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

>   class GRenderBrush : public GRenderDIB

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com> 
    Created:    20/12/99
    Purpose:    A GDraw render region that uses normal DIBs for the bitmap.
                It serves a particularly special purpose in that it provides a number of 
                functions that allow us to blit to the screen very quickly without 
                getting tangled up in the render loop.  This is so that we can draw brush 
                strokes and have them appear on the screen in real time.
                This is achieved by maintaining not one but  four static
                bitmaps.  These work in the following way:

                The main bitmap (lpbits) needs to have the current view rendered into it before
                beginning the brush stroke.
                lpbrushbits - bitmap which has the brush rendered into it.
                
                What we do instead of rendering is to simply combine the brush bitmap with 
                the view bitmap, copy the results to lppreconvertbits and either blit it or 
                convert it(if we are on a <24bit device).

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

class GRenderBrush : public GRenderDIB
{
    CC_DECLARE_DYNAMIC(GRenderBrush)

public:
    GRenderBrush(DocRect ClipRegion, Matrix ConvertMatrix, FIXED16 ViewScale, UINT32 Depth, double dpi);
    ~GRenderBrush();

     
    void DrawToScreenNow(); // the top level function that gets whatever is in the
                            // is in the changed BBox onto the screen
    
public:   // access functions
    void SetChangedBBox(DocRect Rect);

public: // functions you need to call to set up the bitmaps
        // before you draw anything
    
    BOOL InitialiseBrushBitmaps(DocRect BrushRect);
    void SetupMainBitmap();
    
    // plots the brush into the main bitmap
    BOOL PlotBrushIntoBigBitmap(DocRect BrushRect);
    
    // captures the screen as a bitmap
    BOOL CaptureView(Spread* pSpread);
    
    // sets the window to the top of the z-order
    BOOL MoveWindowToFront();
    
    BOOL ResetMatrix();

    void Blackout();

    static BOOL Convert16to32( LPBITMAPINFO pSourceInfo, LPBYTE pSourceBits, RGBQUAD* pPalette,
                              LPBITMAPINFO pDestInfo, LPBYTE pDestBits);
    UINT32  GetScreenDepth() { return (UINT32)ScreenDepth; }

protected: // helper functions
    BOOL ConvertBrushBitmap();   // converts the brush bitmap to the right depth
    BOOL TestConvertBitmap();
    
    BOOL ClipBrushBitmaps(RECT* pUsedRect, INT32* pHeight);  //makes sure we only blit the 
                                                           // the size of the usedrect
    void SetupBitmap(LPBITMAPINFO pBitmapInfo, LPBYTE pBits);
    BOOL InitialiseBrushBitmaps(INT32 Width, INT32 Height, INT32 RenderDepth, INT32 DeviceDepth);

    BOOL CaptureViewByRendering(); // renders the view into our bitmap

PORTNOTE("other", "Disable HDC stuff")
#ifndef EXCLUDE_FROM_XARALX
    // test to split up the captureview fns for better profiling
    BOOL Blit(HDC DestDC, HDC SourceDC, INT32 Height, INT32 Width, INT32 Left, INT32 Top);
    BOOL GetBits(HDC hDC, HBITMAP hBitmap, INT32 Height, LPBYTE lpbits, LPBITMAPINFO lpInfo);
#endif

    virtual void FreeLPBits( LPBITMAPINFO, LPBYTE );

// Karim 21/07/2000
// Overrides so that GRenderBrush doesn't have to worry about feathers
// (which are offscreen attrs).
public:
    virtual void SetOffscreen(OffscreenAttrValue*) {}
    virtual void RestoreOffscreen(OffscreenAttrValue*) {}

//#ifdef NEWFASTBRUSHES
    // CGS 16/1/2001
    // allow us to optimise the code within DrawToScreenNow - so that we do NOT always have
    // to expensively grab hold of the views DC within an interactive loop ....
    void SetView (View* v)          { m_pView = v; }
    void SetCamView (CCamView* v)   { m_pCCamView = v; }
PORTNOTE("other", "Disable HDC stuff")
#ifndef EXCLUDE_FROM_XARALX
    void SetCDC (CDC* cdc)          { m_pDevContext = cdc; }
    void SetHDC (HDC hdc)           { m_DeviceHdc = hdc; }
#endif
//#endif

protected:  // Data

    LPBITMAPINFO lpPreConvertBrushBitmapInfo;   
    LPBYTE lpPreConvertBrushBits;
    LPBITMAPINFO lpPostConvertBrushBitmapInfo;
    LPBYTE lpPostConvertBrushBits;
    LPBITMAPINFO lpBrushBitmapInfo;
    LPBYTE lpBrushBits;

    LPBITMAPINFO lpTestInfo;
    LPBYTE       lpTestBits;

    RGBQUAD* m_pPalette;

//#ifdef NEWFASTBRUSHES
    // CGS 16/1/2001
    // allow us to optimise the code within DrawToScreenNow - so that we do NOT always have
    // to expensively grab hold of the views DC within an interactive loop ....
    View*   m_pView;
    CCamView* m_pCCamView;
PORTNOTE("other", "Disable HDC stuff")
#ifndef EXCLUDE_FROM_XARALX
    CDC* m_pDevContext;
    HDC m_DeviceHdc;
#endif
//#endif
};
    
#endif

---