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 PTD.
 *
 * PTD 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.
 * 
 * PTD 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.
 */
#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" /* Error Title (Related To This Class)...*/

#define out_of_core() do { \
        MessageBox (NULL, "Can not allocate memory", ERROR_TITLE, MB_OK|MB_ICONSTOP); \
        return FALSE; \
    } while (1)


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 == NULL) 
        MagnifyX = 0;
    if (MagnifyY == NULL) 
        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 = NULL;

    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	twoaday	2	/* 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 PTD.
6			*
7			* PTD 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			* PTD 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			#include <windows.h>
32			#include <ocidl.h>
33			#include <olectl.h>
34
35			#include <stdio.h>
36			#include <string.h>
37			#include <errno.h>
38			#include <sys/stat.h>
39
40			#include "wptJPG.h"
41
42			#define HIMETRIC_INCH 2540
43			#define ERROR_TITLE "CJPG Error" /* Error Title (Related To This Class)...*/
44
45	twoaday	23	#define out_of_core() do { \
46			MessageBox (NULL, "Can not allocate memory", ERROR_TITLE, MB_OK\|MB_ICONSTOP); \
47			return FALSE; \
48			} while (1)
49	twoaday	2
50	twoaday	23
51			CJPG::CJPG (void)
52	twoaday	2	{
53			m_IPicture = NULL;
54			m_Height = 0;
55			m_Weight = 0;
56			m_Width = 0;
57			}
58
59
60	twoaday	23	CJPG::~CJPG (void)
61	twoaday	2	{
62			if (m_IPicture != NULL)
63			FreePictureData ();
64			}
65
66
67
68	twoaday	23	/* Free the allocated memory that holdes the IPicture Interface data
69			and clear picture information. */
70			void
71			CJPG::FreePictureData (void)
72	twoaday	2	{
73			if (m_IPicture != NULL) {
74			m_IPicture->Release();
75			m_IPicture = NULL;
76			m_Height = 0;
77			m_Weight = 0;
78			m_Width = 0;
79			}
80			}
81
82
83			/* Open a JPG File And Load It Into IPicture (Interface) */
84	twoaday	23	BOOL
85			CJPG::Load (LPCSTR sFilePathName)
86	twoaday	2	{
87			BOOL bResult = FALSE;
88			FILE * f;
89			int nSize = 0;
90
91			if (m_IPicture != NULL)
92			FreePictureData ();
93
94			f = fopen (sFilePathName, "rb");
95			if (f) {
96			struct stat st;
97			fstat (fileno (f), &st);
98			nSize = st.st_size;
99	twoaday	23	BYTE *pBuffer = new BYTE[nSize];
100			if (!pBuffer) {
101			fclose (f);
102			out_of_core ();
103			}
104			memset (pBuffer, 0, nSize);
105	twoaday	2	if (fread(pBuffer, 1, nSize, f) > 0) {
106			if (LoadPictureData (pBuffer, nSize))
107			bResult = TRUE;
108			}
109			fclose (f);
110			delete [] pBuffer;
111			}
112	twoaday	23	else {
113			MessageBox (NULL, strerror (errno), ERROR_TITLE, MB_OK\|MB_ICONSTOP);
114			bResult = FALSE;
115	twoaday	2	}
116
117			m_Weight = nSize; /* Update Picture Size Info... */
118
119	twoaday	23	if(m_IPicture != NULL) {
120	twoaday	2	m_IPicture->get_Height (&m_Height);
121			m_IPicture->get_Width (&m_Width);
122			/* Calculate Its Size On a "Standard" (96 DPI) Device Context */
123			m_Height = MulDiv (m_Height, 96, HIMETRIC_INCH);
124			m_Width = MulDiv (m_Width, 96, HIMETRIC_INCH);
125			}
126	twoaday	23	else {
127			/* Picture data is not a known picture type */
128	twoaday	2	m_Height = 0;
129			m_Width = 0;
130			bResult = FALSE;
131			}
132	twoaday	23	return bResult;
133	twoaday	2	}
134
135
136
137	twoaday	23	/* read the picture data from a source (file / resource)
138			and load it into the current IPicture object in use */
139			BOOL
140			CJPG::LoadPictureData (BYTE *pBuffer, int nSize)
141	twoaday	2
142			{
143			BOOL bResult = FALSE;
144			HGLOBAL hGlobal;
145			void* pData;
146			IStream* pStream = NULL;
147
148			hGlobal = GlobalAlloc (GMEM_MOVEABLE, nSize);
149			if (hGlobal == NULL) {
150	twoaday	23	out_of_core ();
151			return FALSE;
152	twoaday	2	}
153
154			pData = GlobalLock (hGlobal);
155			memcpy (pData, pBuffer, nSize);
156			GlobalUnlock (hGlobal);
157
158			if (CreateStreamOnHGlobal (hGlobal, TRUE, &pStream) == S_OK) {
159			HRESULT hr;
160	twoaday	23	hr = OleLoadPicture (pStream, nSize, FALSE, IID_IPicture, (LPVOID *)&m_IPicture);
161			if (hr == E_NOINTERFACE) {
162			MessageBox (NULL, "IPicture interface is not supported", ERROR_TITLE, MB_OK\|MB_ICONSTOP);
163			return FALSE;
164	twoaday	2	}
165	twoaday	23	else { /* S_OK */
166	twoaday	2	pStream->Release ();
167			pStream = NULL;
168			bResult = TRUE;
169			}
170			}
171
172			GlobalFree (hGlobal);
173			return (bResult);
174			}
175
176
177	twoaday	23	/* Draw the loaded picture direct to the client DC */
178			BOOL
179			CJPG::Show (HDC pDC, POINT LeftTop, POINT WidthHeight,
180			int MagnifyX, int MagnifyY)
181	twoaday	2
182			{
183	twoaday	23	long Width = 0;
184			long Height = 0;
185
186	twoaday	2	if (pDC == NULL \|\| m_IPicture == NULL)
187			return FALSE;
188	twoaday	23
189	twoaday	2	m_IPicture->get_Width (&Width);
190			m_IPicture->get_Height (&Height);
191
192			if (MagnifyX == NULL)
193			MagnifyX = 0;
194			if (MagnifyY == NULL)
195			MagnifyY = 0;
196			MagnifyX = int(MulDiv (Width, GetDeviceCaps(pDC, LOGPIXELSX), HIMETRIC_INCH) * MagnifyX);
197			MagnifyY = int(MulDiv (Height, GetDeviceCaps(pDC, LOGPIXELSY), HIMETRIC_INCH) * MagnifyY);
198
199			RECT DrawRect;
200			DrawRect.left = LeftTop->x;
201			DrawRect.top = LeftTop->y;
202			DrawRect.right = MagnifyX;
203			DrawRect.bottom = MagnifyY;
204
205			HRESULT hrP = NULL;
206
207			hrP = m_IPicture->Render (pDC,
208			LeftTop->x, // Left
209			LeftTop->y, // Top
210			WidthHeight->x +MagnifyX, // Width
211			WidthHeight->y +MagnifyY, // Height
212			0,
213			Height,
214			Width,
215			-Height,
216			&DrawRect);
217
218			if (SUCCEEDED (hrP))
219			return (TRUE);
220
221	twoaday	23	out_of_core ();
222	twoaday	2	}
223
224
225	twoaday	23	/* Get the original picture pixel size (ignore what current DC is using)
226			pointer to a Device Context is needed for pixel calculation, */
227			BOOL
228			CJPG::UpdateSizeOnDC (HDC pDC)
229	twoaday	2
230			{
231			if(pDC == NULL \|\| m_IPicture == NULL) {
232			m_Height = 0;
233			m_Width = 0;
234			return (FALSE);
235			}
236
237			m_IPicture->get_Height (&m_Height);
238			m_IPicture->get_Width (&m_Width);
239
240	twoaday	23	/* Get Current DPI - Dot Per Inch */
241	twoaday	2	int CurrentDPI_X = GetDeviceCaps (pDC, LOGPIXELSX);
242			int CurrentDPI_Y = GetDeviceCaps (pDC, LOGPIXELSY);
243
244			m_Height = MulDiv (m_Height, CurrentDPI_Y, HIMETRIC_INCH);
245			m_Width = MulDiv (m_Width, CurrentDPI_X, HIMETRIC_INCH);
246
247			return (TRUE);
248			}