trunk/PTD/wptJPG.cpp

/* wptJPG.cpp : JPG picture class
 *      Copyright (C) 2001 Dr.Yovav Gad <[email protected]>
 *      Copyright (C) 2005 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * WinPT is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PTD; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

/*-----------------------------------------------------------------------------
 * Picture (Implementations) Version 1.00
 *
 * Routinges for showing JPG pictur files
 *
 * Author: Dr. Yovav Gad, EMail: [email protected] ,Web: www.SuperMain.com
 * 
 * This version uses a stripped down version of Picture.cpp and Picture.h.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <windows.h>
#include <ocidl.h>
#include <olectl.h>

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>

#include "wptJPG.h"

#define HIMETRIC_INCH   2540
#define ERROR_TITLE     "CJPG Error"

#define out_of_core() do { \
        MessageBox (NULL, "Can not allocate memory", ERROR_TITLE, MB_OK|MB_ICONSTOP); \
        return FALSE; \
    } while (0)


CJPG::CJPG (void)
{
    m_IPicture = NULL;
    m_Height = 0;
    m_Weight = 0;
    m_Width = 0;
}


CJPG::~CJPG (void)
{
    if (m_IPicture != NULL)
        freePictureData (); 
}


/* Free the allocated memory that holdes the IPicture Interface data
   and clear picture information. */
void 
CJPG::freePictureData (void)
{
    if (m_IPicture != NULL) {
        m_IPicture->Release();
        m_IPicture = NULL;
        m_Height = 0;
        m_Weight = 0;
        m_Width = 0;    
    }
}


/* Open a JPG File And Load It Into IPicture (Interface) */
BOOL 
CJPG::load (LPCSTR sFilePathName)
{
    BOOL bResult = FALSE;
    FILE * f;
    int nSize = 0;

    if (m_IPicture != NULL) 
        freePictureData ();

    f = fopen (sFilePathName, "rb");
    if (f) {
        struct stat st;
        fstat (fileno (f), &st);
        nSize = st.st_size;
        BYTE *pBuffer = new BYTE[nSize];
        if  (!pBuffer) {
            fclose (f);
            out_of_core ();
        }
        memset (pBuffer, 0, nSize);
        if (fread(pBuffer, 1, nSize, f) > 0) {
            if (loadPictureData (pBuffer, nSize))
                bResult = TRUE;
        }
        fclose (f);
        delete [] pBuffer;
    }
    else {
        MessageBox (NULL, strerror (errno), ERROR_TITLE, MB_OK|MB_ICONSTOP);
        bResult = FALSE;
    }

    m_Weight = nSize; /* Update Picture Size Info... */

    if(m_IPicture != NULL) {
        m_IPicture->get_Height (&m_Height);
        m_IPicture->get_Width (&m_Width);
        /* Calculate Its Size On a "Standard" (96 DPI) Device Context */
        m_Height = MulDiv (m_Height, 96, HIMETRIC_INCH);
        m_Width  = MulDiv (m_Width,  96, HIMETRIC_INCH);        
    }
    else {
        /* Picture data is not a known picture type */
        m_Height = 0;
        m_Width = 0;
        bResult = FALSE;        
    }
    return bResult;
}


/* read the picture data from a source (file / resource)
   and load it into the current IPicture object in use */
BOOL 
CJPG::loadPictureData (BYTE *pBuffer, int nSize)

{
    BOOL bResult = FALSE;
    HGLOBAL hGlobal;
    void* pData;
    IStream* pStream = NULL;
    
    hGlobal = GlobalAlloc (GMEM_MOVEABLE, nSize);
    if (hGlobal == NULL) {
        out_of_core ();
        return FALSE;
    }

    pData = GlobalLock (hGlobal);
    memcpy (pData, pBuffer, nSize);
    GlobalUnlock (hGlobal);

    if (CreateStreamOnHGlobal (hGlobal, TRUE, &pStream) == S_OK) {
        HRESULT hr;
        hr = OleLoadPicture (pStream, nSize, FALSE, IID_IPicture, 
                             (LPVOID *)&m_IPicture);
        if (hr == E_NOINTERFACE) {
            MessageBox (NULL, "IPicture interface is not supported", 
                        ERROR_TITLE, MB_OK|MB_ICONSTOP);
            return FALSE;
        }
        else { /* S_OK */
            pStream->Release ();
            pStream = NULL;
            bResult = TRUE;
        }       
    }

    GlobalFree (hGlobal);
    return (bResult);
}


/* Draw the loaded picture direct to the client DC */
BOOL 
CJPG::show (HDC pDC, POINT *LeftTop, POINT *WidthHeight, 
            int MagnifyX, int MagnifyY)

{
    long Width  = 0;
    long Height = 0;

    if (pDC == NULL || m_IPicture == NULL) 
        return FALSE;

    m_IPicture->get_Width (&Width);
    m_IPicture->get_Height (&Height);
        
    if (MagnifyX == 0) 
        MagnifyX = 0;
    if (MagnifyY == 0) 
        MagnifyY = 0;
    MagnifyX = int(MulDiv (Width, GetDeviceCaps(pDC, LOGPIXELSX), HIMETRIC_INCH) * MagnifyX);
    MagnifyY = int(MulDiv (Height, GetDeviceCaps(pDC, LOGPIXELSY), HIMETRIC_INCH) * MagnifyY);
    
    RECT DrawRect;
    DrawRect.left = LeftTop->x;
    DrawRect.top = LeftTop->y;
    DrawRect.right = MagnifyX;
    DrawRect.bottom = MagnifyY;

    HRESULT hrP = 0;

    hrP = m_IPicture->Render (pDC,
                      LeftTop->x,               // Left
                      LeftTop->y,               // Top
                      WidthHeight->x +MagnifyX, // Width
                      WidthHeight->y +MagnifyY, // Height
                      0,
                      Height,
                      Width,
                      -Height,
                      &DrawRect);

    if (SUCCEEDED (hrP)) 
        return (TRUE);

    out_of_core ();
}


/* Get the original picture pixel size (ignore what current DC is using)
   pointer to a Device Context is needed for pixel calculation, */
BOOL 
CJPG::updateSizeOnDC (HDC pDC)

{       
    if(pDC == NULL || m_IPicture == NULL) { 
        m_Height = 0; 
        m_Width = 0; 
        return (FALSE); 
    }

    m_IPicture->get_Height (&m_Height);
    m_IPicture->get_Width (&m_Width);

    /* Get Current DPI - Dot Per Inch */
    int CurrentDPI_X = GetDeviceCaps (pDC, LOGPIXELSX);
    int CurrentDPI_Y = GetDeviceCaps (pDC, LOGPIXELSY);

    m_Height = MulDiv (m_Height, CurrentDPI_Y, HIMETRIC_INCH);
    m_Width  = MulDiv (m_Width,  CurrentDPI_X, HIMETRIC_INCH);

    return (TRUE);
}
1	werner	46	/* wptJPG.cpp : JPG picture class
2			* Copyright (C) 2001 Dr.Yovav Gad <[email protected]>
3			* Copyright (C) 2005 Timo Schulz
4			*
5			* This file is part of WinPT.
6			*
7			* WinPT is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* WinPT is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with PTD; if not, write to the Free Software Foundation,
19			* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
20			*/
21
22			/*-----------------------------------------------------------------------------
23			* Picture (Implementations) Version 1.00
24			*
25			* Routinges for showing JPG pictur files
26			*
27			* Author: Dr. Yovav Gad, EMail: [email protected] ,Web: www.SuperMain.com
28			*
29			* This version uses a stripped down version of Picture.cpp and Picture.h.
30			*/
31			#ifdef HAVE_CONFIG_H
32			#include <config.h>
33			#endif
34
35			#include <windows.h>
36			#include <windows.h>
37			#include <ocidl.h>
38			#include <olectl.h>
39
40			#include <stdio.h>
41			#include <string.h>
42			#include <errno.h>
43			#include <sys/stat.h>
44
45			#include "wptJPG.h"
46
47			#define HIMETRIC_INCH 2540
48			#define ERROR_TITLE "CJPG Error"
49
50			#define out_of_core() do { \
51			MessageBox (NULL, "Can not allocate memory", ERROR_TITLE, MB_OK\|MB_ICONSTOP); \
52			return FALSE; \
53			} while (0)
54
55
56			CJPG::CJPG (void)
57			{
58			m_IPicture = NULL;
59			m_Height = 0;
60			m_Weight = 0;
61			m_Width = 0;
62			}
63
64
65			CJPG::~CJPG (void)
66			{
67			if (m_IPicture != NULL)
68			freePictureData ();
69			}
70
71
72
73			/* Free the allocated memory that holdes the IPicture Interface data
74			and clear picture information. */
75			void
76			CJPG::freePictureData (void)
77			{
78			if (m_IPicture != NULL) {
79			m_IPicture->Release();
80			m_IPicture = NULL;
81			m_Height = 0;
82			m_Weight = 0;
83			m_Width = 0;
84			}
85			}
86
87
88			/* Open a JPG File And Load It Into IPicture (Interface) */
89			BOOL
90			CJPG::load (LPCSTR sFilePathName)
91			{
92			BOOL bResult = FALSE;
93			FILE * f;
94			int nSize = 0;
95
96			if (m_IPicture != NULL)
97			freePictureData ();
98
99			f = fopen (sFilePathName, "rb");
100			if (f) {
101			struct stat st;
102			fstat (fileno (f), &st);
103			nSize = st.st_size;
104			BYTE *pBuffer = new BYTE[nSize];
105			if (!pBuffer) {
106			fclose (f);
107			out_of_core ();
108			}
109			memset (pBuffer, 0, nSize);
110			if (fread(pBuffer, 1, nSize, f) > 0) {
111			if (loadPictureData (pBuffer, nSize))
112			bResult = TRUE;
113			}
114			fclose (f);
115			delete [] pBuffer;
116			}
117			else {
118			MessageBox (NULL, strerror (errno), ERROR_TITLE, MB_OK\|MB_ICONSTOP);
119			bResult = FALSE;
120			}
121
122			m_Weight = nSize; /* Update Picture Size Info... */
123
124			if(m_IPicture != NULL) {
125			m_IPicture->get_Height (&m_Height);
126			m_IPicture->get_Width (&m_Width);
127			/* Calculate Its Size On a "Standard" (96 DPI) Device Context */
128			m_Height = MulDiv (m_Height, 96, HIMETRIC_INCH);
129			m_Width = MulDiv (m_Width, 96, HIMETRIC_INCH);
130			}
131			else {
132			/* Picture data is not a known picture type */
133			m_Height = 0;
134			m_Width = 0;
135			bResult = FALSE;
136			}
137			return bResult;
138			}
139
140
141
142			/* read the picture data from a source (file / resource)
143			and load it into the current IPicture object in use */
144			BOOL
145			CJPG::loadPictureData (BYTE *pBuffer, int nSize)
146
147			{
148			BOOL bResult = FALSE;
149			HGLOBAL hGlobal;
150			void* pData;
151			IStream* pStream = NULL;
152
153			hGlobal = GlobalAlloc (GMEM_MOVEABLE, nSize);
154			if (hGlobal == NULL) {
155			out_of_core ();
156			return FALSE;
157			}
158
159			pData = GlobalLock (hGlobal);
160			memcpy (pData, pBuffer, nSize);
161			GlobalUnlock (hGlobal);
162
163			if (CreateStreamOnHGlobal (hGlobal, TRUE, &pStream) == S_OK) {
164			HRESULT hr;
165			hr = OleLoadPicture (pStream, nSize, FALSE, IID_IPicture,
166			(LPVOID *)&m_IPicture);
167			if (hr == E_NOINTERFACE) {
168			MessageBox (NULL, "IPicture interface is not supported",
169			ERROR_TITLE, MB_OK\|MB_ICONSTOP);
170			return FALSE;
171			}
172			else { /* S_OK */
173			pStream->Release ();
174			pStream = NULL;
175			bResult = TRUE;
176			}
177			}
178
179			GlobalFree (hGlobal);
180			return (bResult);
181			}
182
183
184			/* Draw the loaded picture direct to the client DC */
185			BOOL
186			CJPG::show (HDC pDC, POINT LeftTop, POINT WidthHeight,
187			int MagnifyX, int MagnifyY)
188
189			{
190			long Width = 0;
191			long Height = 0;
192
193			if (pDC == NULL \|\| m_IPicture == NULL)
194			return FALSE;
195
196			m_IPicture->get_Width (&Width);
197			m_IPicture->get_Height (&Height);
198
199			if (MagnifyX == 0)
200			MagnifyX = 0;
201			if (MagnifyY == 0)
202			MagnifyY = 0;
203			MagnifyX = int(MulDiv (Width, GetDeviceCaps(pDC, LOGPIXELSX), HIMETRIC_INCH) * MagnifyX);
204			MagnifyY = int(MulDiv (Height, GetDeviceCaps(pDC, LOGPIXELSY), HIMETRIC_INCH) * MagnifyY);
205
206			RECT DrawRect;
207			DrawRect.left = LeftTop->x;
208			DrawRect.top = LeftTop->y;
209			DrawRect.right = MagnifyX;
210			DrawRect.bottom = MagnifyY;
211
212			HRESULT hrP = 0;
213
214			hrP = m_IPicture->Render (pDC,
215			LeftTop->x, // Left
216			LeftTop->y, // Top
217			WidthHeight->x +MagnifyX, // Width
218			WidthHeight->y +MagnifyY, // Height
219			0,
220			Height,
221			Width,
222			-Height,
223			&DrawRect);
224
225			if (SUCCEEDED (hrP))
226			return (TRUE);
227
228			out_of_core ();
229			}
230
231
232			/* Get the original picture pixel size (ignore what current DC is using)
233			pointer to a Device Context is needed for pixel calculation, */
234			BOOL
235			CJPG::updateSizeOnDC (HDC pDC)
236
237			{
238			if(pDC == NULL \|\| m_IPicture == NULL) {
239			m_Height = 0;
240			m_Width = 0;
241			return (FALSE);
242			}
243
244			m_IPicture->get_Height (&m_Height);
245			m_IPicture->get_Width (&m_Width);
246
247			/* Get Current DPI - Dot Per Inch */
248			int CurrentDPI_X = GetDeviceCaps (pDC, LOGPIXELSX);
249			int CurrentDPI_Y = GetDeviceCaps (pDC, LOGPIXELSY);
250
251			m_Height = MulDiv (m_Height, CurrentDPI_Y, HIMETRIC_INCH);
252			m_Width = MulDiv (m_Width, CurrentDPI_X, HIMETRIC_INCH);
253
254			return (TRUE);
255			}