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- //-----------------------------------------------------------------------------------//
- // Windows Graphics Programming: Win32 GDI and DirectDraw //
- // ISBN 0-13-086985-6 //
- // //
- // Written by Yuan, Feng www.fengyuan.com //
- // Copyright (c) 2000 by Hewlett-Packard Company www.hp.com //
- // Published by Prentice Hall PTR, Prentice-Hall, Inc. www.phptr.com //
- // //
- // FileName : emf.cpp //
- // Description: Generic enhanced metafile handling //
- // Version : 1.00.000, May 31, 2000 //
- //-----------------------------------------------------------------------------------//
-
- #define STRICT
- #define WIN32_LEAN_AND_MEAN
-
- #include <windows.h>
- #include <tchar.h>
- #include <assert.h>
- #include <math.h>
- #include <commdlg.h>
- #include <stdio.h>
-
- #include "emf.h"
- #include "filedialog.h"
-
-
- // map a rectangle in logical coordinate to 0.01 mm units
- void Map10um(HDC hDC, RECT & rect)
- {
- int widthmm = GetDeviceCaps(hDC, HORZSIZE);
- int heightmm = GetDeviceCaps(hDC, VERTSIZE);
- int widthpixel = GetDeviceCaps(hDC, HORZRES);
- int heightpixel= GetDeviceCaps(hDC, VERTRES);
-
- LPtoDP(hDC, (POINT *) & rect, 2);
-
- rect.left = ( rect.left * widthmm * 100 + widthpixel/2) / widthpixel;
- rect.right = ( rect.right * widthmm * 100 + widthpixel/2) / widthpixel;
- rect.top = ( rect.top * heightmm * 100 + heightpixel/2) / heightpixel;
- rect.bottom = ( rect.bottom * heightmm * 100 + heightpixel/2) / heightpixel;
- }
-
-
- // load an EMF attached as a resource, use RCDATA as type
- HENHMETAFILE LoadEMF(HMODULE hModule, LPCTSTR pName)
- {
- HRSRC hRsc = FindResource(hModule, pName, RT_RCDATA);
-
- if ( hRsc==NULL )
- return NULL;
-
- HGLOBAL hResData = LoadResource(hModule, hRsc);
- LPVOID pEmf = LockResource(hResData);
-
- return SetEnhMetaFileBits(SizeofResource(hModule, hRsc), (const BYTE *) pEmf);
- }
-
-
- // query for EMF dimension, convert to logical coordinate
- void GetEMFDimension(HDC hDC, HENHMETAFILE hEmf, int & width, int & height)
- {
- ENHMETAHEADER emfh[5]; // big enough for description
- GetEnhMetaFileHeader(hEmf, sizeof(emfh), emfh);
-
- // picture size in 0.01 mm
- width = emfh[0].rclFrame.right - emfh[0].rclFrame.left;
- height = emfh[0].rclFrame.bottom - emfh[0].rclFrame.top;
-
- // convert to pixels for current device
- int t = GetDeviceCaps(hDC, HORZSIZE) * 100;
- width = ( width * GetDeviceCaps(hDC, HORZRES) + t/2 ) / t;
-
- t = GetDeviceCaps(hDC, VERTSIZE) * 100;
- height = ( height * GetDeviceCaps(hDC, VERTRES) + t/2 ) / t;
-
- RECT rect = { 0, 0, width, height };
-
- // convert to logical coordinate space
- DPtoLP(hDC, (POINT *) & rect, 2);
-
- width = abs(rect.right - rect.left);
- height = abs(rect.bottom - rect.top);
- }
-
-
- // displaying EMF at a given ratio
- BOOL DisplayEMF(HDC hDC, HENHMETAFILE hEmf, int x, int y, int scalex, int scaley, KEnumEMF * enumerator, bool showxform)
- {
- int width, height;
- GetEMFDimension(hDC, hEmf, width, height);
-
- RECT rect = { x, y,
- x + (width * scalex + 50)/100,
- y + (height * scaley + 50)/100 };
-
- BOOL rslt;
-
- if ( enumerator )
- rslt = enumerator->EnumEMF(hDC, hEmf, & rect);
- else
- rslt = PlayEnhMetaFile(hDC, hEmf, & rect);
-
- if ( showxform )
- {
- XFORM xform;
-
- if ( GetPlayTransformation(hEmf, & rect, xform) )
- {
- TCHAR mess[128];
-
- _stprintf(mess, _T("x' = x * %8.5f + y * %8.5f + %8.5f"), xform.eM11, xform.eM21, xform.eDx);
- TextOut(hDC, x, rect.bottom + 10, mess, _tcslen(mess));
-
- _stprintf(mess, _T("y' = x * %8.5f + y * %8.5f + %8.5f"), xform.eM12, xform.eM22, xform.eDy);
- TextOut(hDC, x, rect.bottom + 40, mess, _tcslen(mess));
- }
- }
-
- return rslt;
- }
-
-
- HDC QuerySaveEMFFile(const TCHAR * description, const RECT * rcFrame, TCHAR szFileName[])
- {
- KFileDialog fd;
-
- if ( fd.GetSaveFileName(NULL, _T("emf"), _T("Enhanced Metafiles")) )
- {
- if ( szFileName )
- _tcscpy(szFileName, fd.m_TitleName);
-
- return CreateEnhMetaFile(NULL, fd.m_TitleName, rcFrame, description);
- }
- else
- return NULL;
- }
-
-
- HENHMETAFILE QueryOpenEMFFile(TCHAR szFileName[])
- {
- KFileDialog fd;
-
- if ( fd.GetOpenFileName(NULL, _T("emf|spl"), _T("Enhanced Metafiles|Win NT/2000 EMF Spool Files")) )
- {
- if ( szFileName )
- _tcscpy(szFileName, fd.m_TitleName);
-
- return GetEnhMetaFile(fd.m_TitleName);
- }
- else
- return NULL;
- }
-
-
- HENHMETAFILE PasteFromClipboard(HWND hWnd)
- {
- HENHMETAFILE hEmf = NULL;
-
- if ( OpenClipboard(hWnd) )
- {
- hEmf = (HENHMETAFILE) GetClipboardData(CF_ENHMETAFILE);
-
- if ( hEmf )
- hEmf = CopyEnhMetaFile(hEmf, NULL);
-
- CloseClipboard();
- }
-
- return hEmf;
- }
-
-
- void CopyToClipboard(HWND hWnd, HENHMETAFILE hEmf)
- {
- if ( OpenClipboard(hWnd) )
- {
- EmptyClipboard();
- SetClipboardData(CF_ENHMETAFILE, hEmf);
- CloseClipboard();
- }
- }
-
-
-
- HPALETTE GetEMFPalette(HENHMETAFILE hEmf, HDC hDC)
- {
- // query number of entries
- int no = GetEnhMetaFilePaletteEntries(hEmf, 0, NULL);
-
- if ( no<=0 )
- return NULL;
-
- // allocation
- LOGPALETTE * pLogPalette = (LOGPALETTE *) new BYTE[sizeof(LOGPALETTE) + (no-1) * sizeof(PALETTEENTRY)];
-
- pLogPalette->palVersion = 0x300;
- pLogPalette->palNumEntries = no;
-
- // get real data
- GetEnhMetaFilePaletteEntries(hEmf, no, pLogPalette->palPalEntry);
-
- HPALETTE hPal = CreatePalette(pLogPalette);
-
- delete [] (BYTE *) pLogPalette;
-
- return hPal;
- }
-
-
- // Transformation to map recording device's device coordinate space to destination device's logical coordinate space
- BOOL GetPlayTransformation(HENHMETAFILE hEmf, const RECT * rcPic, XFORM & xformPlay)
- {
- ENHMETAHEADER emfh;
-
- if ( GetEnhMetaFileHeader(hEmf, sizeof(emfh), & emfh)<=0 )
- return FALSE;
-
- try
- {
- // frame rectangle size in 0.01 mm -> 1 mm -> percentage -> device pixels
- double sx0 = emfh.rclFrame.left / 100.0 / emfh.szlMillimeters.cx * emfh.szlDevice.cx;
- double sy0 = emfh.rclFrame.top / 100.0 / emfh.szlMillimeters.cy * emfh.szlDevice.cy;
- double sx1 = emfh.rclFrame.right / 100.0 / emfh.szlMillimeters.cx * emfh.szlDevice.cx;
- double sy1 = emfh.rclFrame.bottom / 100.0 / emfh.szlMillimeters.cy * emfh.szlDevice.cy;
-
- // source to destination ratio
- double rx = (rcPic->right - rcPic->left) / ( sx1 - sx0 );
- double ry = (rcPic->bottom - rcPic->top) / ( sy1 - sy0 );
-
- // x' = x * eM11 + y * eM21 + eDx
- // y' = x * eM12 + y * eM22 + eDy
- xformPlay.eM11 = (float) rx;
- xformPlay.eM21 = (float) 0;
- xformPlay.eDx = (float) (- sx0 * rx + rcPic->left);
-
- xformPlay.eM12 = (float) 0;
- xformPlay.eM22 = (float) ry;
- xformPlay.eDy = (float) (- sy0 * ry + rcPic->top);
- }
- catch (...)
- {
- return FALSE;
- }
-
- return TRUE;
- }
-