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extern FilterRecordPtr gpb;
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extern FilterRecordPtr gpb;
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PSPixelMap preview_pmap;
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PSPixelMap preview_pmap;
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PSPixelMask preview_pmask;
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PSPixelMask preview_pmask;
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BufferID preview_handle;
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FFBuffer preview_handle;
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UIRECT preview_rect;
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UIRECT preview_rect;
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int preview_w,preview_h,previewerr = false,needall = false,needinput = true;
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int preview_w,preview_h,previewerr = false,needall = false,needinput = true;
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Point preview_scroll;
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Point preview_scroll;
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Boolean preview_complete = false;
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Boolean preview_complete = false;
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double zoomfactor,fitzoom;
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double zoomfactor,fitzoom;
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                }else
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                }else
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                        preview_pmap.masks = NULL;
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                        preview_pmap.masks = NULL;
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                preview_handle = newBuffer((long)preview_h * preview_pmap.rowBytes);
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                preview_handle = newBuffer((long)preview_h * preview_pmap.rowBytes);
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        }else
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        }else
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                preview_handle = NULL;
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                preview_handle.signature = BUFVERSION_NULL;
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        return preview_handle != NULL;
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        return preview_handle.signature != BUFVERSION_NULL;
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        //---------------------------------------------------------------------------
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        //---------------------------------------------------------------------------
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        // Fields new in version 2:
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        // Fields new in version 2:
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        //---------------------------------------------------------------------------
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        //---------------------------------------------------------------------------
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//      preview_pmap.pixelOverlays;
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//      preview_pmap.pixelOverlays;
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//      preview_pmap.colorManagementOptions;
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//      preview_pmap.colorManagementOptions;
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}
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}
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void dispose_preview(){
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void dispose_preview(){
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        if(preview_handle){
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                disposeBuffer(preview_handle);
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        disposeBuffer(&preview_handle);
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                preview_handle = NULL;
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        }
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}
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}
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void* memset_bgcolor(void* ptr, size_t num) {
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void* memset_bgcolor(void* ptr, size_t num) {
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        int i;
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        int i;
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        unsigned char* p;
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        unsigned char* p;
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        Rect r, outRect;
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        Rect r, outRect;
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        Ptr outrow;
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        Ptr outrow;
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        preview_complete = false;
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        preview_complete = false;
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        if (preview_handle) {
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        if (preview_handle.signature != BUFVERSION_NULL) {
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                /* size of previewed area, of source image; but no larger than filtered area (selection) */
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                /* size of previewed area, of source image; but no larger than filtered area (selection) */
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                scaledw = zoomfactor * preview_w;
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                scaledw = zoomfactor * preview_w;
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                if (scaledw > ((double)FILTER_RECT(pb).right - (double)FILTER_RECT(pb).left))
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                if (scaledw > ((double)FILTER_RECT(pb).right - (double)FILTER_RECT(pb).left))
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                        scaledw = (double)FILTER_RECT(pb).right - (double)FILTER_RECT(pb).left;
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                        scaledw = (double)FILTER_RECT(pb).right - (double)FILTER_RECT(pb).left;
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                scaledh = zoomfactor * preview_h;
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                scaledh = zoomfactor * preview_h;
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        VRect r, outRect;
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        VRect r, outRect;
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        Ptr outrow;
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        Ptr outrow;
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        preview_complete = false;
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        preview_complete = false;
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        if (preview_handle) {
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        if (preview_handle.signature != BUFVERSION_NULL) {
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                /* size of previewed area, of source image; but no larger than filtered area (selection) */
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                /* size of previewed area, of source image; but no larger than filtered area (selection) */
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                scaledw = zoomfactor * preview_w;
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                scaledw = zoomfactor * preview_w;
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                if (scaledw > ((double)BIGDOC_FILTER_RECT(pb).right - (double)BIGDOC_FILTER_RECT(pb).left))
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                if (scaledw > ((double)BIGDOC_FILTER_RECT(pb).right - (double)BIGDOC_FILTER_RECT(pb).left))
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                        scaledw = (double)BIGDOC_FILTER_RECT(pb).right - (double)BIGDOC_FILTER_RECT(pb).left;
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                        scaledw = (double)BIGDOC_FILTER_RECT(pb).right - (double)BIGDOC_FILTER_RECT(pb).left;
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                scaledh = zoomfactor * preview_h;
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                scaledh = zoomfactor * preview_h;
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        VRect srcRect;
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        VRect srcRect;
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        UIRECT imagebounds;
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        UIRECT imagebounds;
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        UNREFERENCED_PARAMETER(dp);
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        UNREFERENCED_PARAMETER(dp);
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        if(preview_handle && preview_complete){
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        if((preview_handle.signature != BUFVERSION_NULL) && preview_complete){
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                srcRect = preview_pmap.bounds;
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                srcRect = preview_pmap.bounds;
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                imagebounds.left = (preview_rect.left + preview_rect.right - preview_w)/2;
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                imagebounds.left = (preview_rect.left + preview_rect.right - preview_w)/2;
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                imagebounds.top = (preview_rect.top + preview_rect.bottom - preview_h)/2;
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                imagebounds.top = (preview_rect.top + preview_rect.bottom - preview_h)/2;