Drawing transparent bitmaps using CImage

Troels Knakkergaard

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17 Sep 20017 min read

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Universal implementation of transparent drawing of bitmap files (BMP, JPEG, GIF, PNG). Based on the method described by Chris Becke and Raja Segar.

cimage.zip
- BIN
  - cimage.dll
  - demodll.exe
  - test.gif
- cimage.dsw
- CIMAGE
  - cimage.gif
  - cimage.html
  - demo.gif
  - imagedll.dsp
  - imagelib.dsp
  - INCLUDE
    - cimage.h
    - cimage.inl
  - JPEG
    - change.log
    - filelist.txt
    - JCAPIMIN.C
    - JCAPISTD.C
    - JCCOEFCT.C
    - JCCOLOR.C
    - JCDCTMGR.C
    - JCHUFF.C
    - JCHUFF.H
    - JCINIT.C
    - JCMAINCT.C
    - JCMARKER.C
    - JCMASTER.C
    - JCOMAPI.C
    - JCONFIG.H
    - jconfig.vc
    - JCPARAM.C
    - JCPHUFF.C
    - JCPREPCT.C
    - JCSAMPLE.C
    - JCTRANS.C
    - JDAPIMIN.C
    - JDAPISTD.C
    - JDATADST.C
    - JDATASRC.C
    - JDCOEFCT.C
    - JDCOLOR.C
    - JDCT.H
    - JDDCTMGR.C
    - JDHUFF.C
    - JDHUFF.H
    - JDINPUT.C
    - JDMAINCT.C
    - JDMARKER.C
    - JDMASTER.C
    - JDMERGE.C
    - JDPHUFF.C
    - JDPOSTCT.C
    - JDSAMPLE.C
    - JDTRANS.C
    - JERROR.C
    - JERROR.H
    - JFDCTFLT.C
    - JFDCTFST.C
    - JFDCTINT.C
    - JIDCTFLT.C
    - JIDCTFST.C
    - JIDCTINT.C
    - JIDCTRED.C
    - JINCLUDE.H
    - JMEMMGR.C
    - JMEMNOBS.C
    - JMEMSYS.H
    - Jmorecfg.h
    - JPEGINT.H
    - JPEGLIB.H
    - JQUANT1.C
    - JQUANT2.C
    - JUTILS.C
    - JVERSION.H
    - Readme.txt
  - PNG
    - Announce.txt
    - Changes.txt
    - example.c
    - libpng.txt
    - License.txt
    - png.c
    - png.h
    - png.mak
    - pngconf.h
    - pngerror.c
    - pnggccrd.c
    - pngget.c
    - pngmem.c
    - pngpread.c
    - pngread.c
    - pngrio.c
    - pngrtran.c
    - pngrutil.c
    - pngset.c
    - pngtest.c
    - pngtrans.c
    - pngvcrd.c
    - pngwio.c
    - pngwrite.c
    - pngwtran.c
    - pngwutil.c
    - Readme.txt
  - project.gif
  - SRC
    - cimage.cpp
    - cimage.def
    - cimage.rc
    - cimage_d.def
    - imabmp.cpp
    - imabmp.h
    - imagif.cpp
    - imagif.h
    - imaicon.cpp
    - imaicon.h
    - imajpeg.cpp
    - imajpeg.h
    - imapng.cpp
    - imapng.h
    - imatiff.cpp
    - imatiff.h
    - iterator.h
    - RES
      - cimage.rc2
    - resource.h
    - trans.c
  - TIFF
    - fax3sm_winnt.c
    - libtiff.def
    - t4.h
    - tif_acorn.c
    - tif_apple.c
    - tif_atari.c
    - tif_aux.c
    - tif_c.c
    - tif_close.c
    - tif_codec.c
    - tif_compress.c
    - tif_dir.c
    - tif_dir.h
    - tif_dirinfo.c
    - tif_dirread.c
    - tif_dirwrite.c
    - tif_dumpmode.c
    - tif_error.c
    - tif_fax3.c
    - tif_fax3.h
    - tif_flush.c
    - tif_getimage.c
    - tif_jpeg.c
    - tif_luv.c
    - tif_lzw.c
    - tif_msdos.c
    - tif_next.c
    - tif_open.c
    - tif_packbits.c
    - tif_pixarlog.c
    - tif_predict.c
    - tif_predict.h
    - tif_print.c
    - tif_read.c
    - tif_strip.c
    - tif_swab.c
    - tif_thunder.c
    - tif_tile.c
    - tif_unix.c
    - tif_version.c
    - tif_vms.c
    - tif_warning.c
    - tif_win3.c
    - tif_win32.c
    - tif_write.c
    - tif_zip.c
    - tiff.h
    - tiffcomp.h
    - tiffconf.h
    - tiffio.h
    - tiffiop.h
    - uvcode.h
- DEMO
  - demo.clw
  - demo.dsp
  - SRC
    - app.cpp
    - app.h
    - demo.rc
    - DlgRotate.cpp
    - frame.cpp
    - frame.h
    - helpers.cpp
    - helpers.h
    - imgdoc.cpp
    - imgdoc.h
    - imgframe.cpp
    - imgframe.h
    - imgobj.cpp
    - imgobj.h
    - imgobj.inl
    - imgview.cpp
    - imgview.h
    - mdiface.cpp
    - mdiface.h
    - memdc.h
    - RES
      - app.ico
      - bg.jpg
      - demo.rc2
      - doc.ico
      - Explorer.ico
      - mdiface.bmp
      - testbmp.bmp
      - Toolbar.bmp
      - trans.gif
      - trans.ico
      - us.png
    - resource.h
    - StdAfx.cpp
    - StdAfx.h
- ZLIB
  - ADLER32.C
  - algorithm.txt
  - ChangeLog.txt
  - COMPRESS.C
  - CRC32.C
  - DEFLATE.C
  - DEFLATE.H
  - EXAMPLE.C
  - Faq.txt
  - GZIO.C
  - INFBLOCK.C
  - INFBLOCK.H
  - INFCODES.C
  - INFCODES.H
  - INFFAST.C
  - INFFAST.H
  - inffixed.h
  - INFLATE.C
  - INFTREES.C
  - INFTREES.H
  - INFUTIL.C
  - INFUTIL.H
  - maketree.c
  - MINIGZIP.C
  - Readme.txt
  - TREES.C
  - trees.h
  - UNCOMPR.C
  - ZCONF.H
  - ZLIB.DEF
  - zlib.dsp
  - zlib.dsw
  - ZLIB.H
  - zlib.mak
  - ZLIB.RC
  - ZUTIL.C
  - ZUTIL.H

//Microsoft Developer Studio generated resource script.
//
#include "resource.h"

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "afxres.h"

/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
// Danish resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_DAN)
#ifdef _WIN32
LANGUAGE LANG_DANISH, SUBLANG_DEFAULT
#pragma code_page(1252)
#endif //_WIN32

#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//

1 TEXTINCLUDE DISCARDABLE 
BEGIN
    "resource.h\0"
END

2 TEXTINCLUDE DISCARDABLE 
BEGIN
    "#include ""afxres.h""\r\n"
    "\0"
END

3 TEXTINCLUDE DISCARDABLE 
BEGIN
    "#define _AFX_NO_SPLITTER_RESOURCES\r\n"
    "#define _AFX_NO_OLE_RESOURCES\r\n"
    "#define _AFX_NO_TRACKER_RESOURCES\r\n"
    "#define _AFX_NO_PROPERTY_RESOURCES\r\n"
    "\r\n"
    "#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)\r\n"
    "#ifdef _WIN32\r\n"
    "LANGUAGE 9, 1\r\n"
    "#pragma code_page(1252)\r\n"
    "#endif\r\n"
    "#include ""res\\cimage.rc2""  // non-Microsoft Visual C++ edited resources\r\n"
    "#include ""afxres.rc""         // Standard components\r\n"
    "#endif\r\n"
    "\0"
END

#endif    // APSTUDIO_INVOKED

#endif    // Danish resources
/////////////////////////////////////////////////////////////////////////////


/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32

#ifndef _MAC
/////////////////////////////////////////////////////////////////////////////
//
// Version
//

#if defined(APSTUDIO_INVOKED) || defined(NDEBUG)
#if defined(APSTUDIO_INVOKED)
VS_VERSION_INFO$(NDEBUG) VERSIONINFO
#else
VS_VERSION_INFO VERSIONINFO
#endif
 FILEVERSION 1,4,1,0
 PRODUCTVERSION 1,4,1,0
 FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
 FILEFLAGS 0x21L
#else
 FILEFLAGS 0x20L
#endif
 FILEOS 0x40004L
 FILETYPE 0x1L
 FILESUBTYPE 0x0L
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "040904b0"
        BEGIN
            VALUE "Comments", "\0"
            VALUE "CompanyName", "\0"
            VALUE "FileDescription", "CImage DLL\0"
            VALUE "FileVersion", "1, 4, 1, 0\0"
            VALUE "InternalName", "\0"
            VALUE "LegalCopyright", "Copyright � 2001 Troels K.\0"
            VALUE "LegalTrademarks", "\0"
            VALUE "OriginalFilename", "cimage.dll\0"
            VALUE "PrivateBuild", "\0"
            VALUE "ProductName", "\0"
            VALUE "ProductVersion", "1, 4, 1, 0\0"
            VALUE "SpecialBuild", "Release Build\0"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x409, 1200
    END
END
#endif

#if defined(APSTUDIO_INVOKED) || defined(_DEBUG)
#if defined(APSTUDIO_INVOKED)
VS_VERSION_INFO$(_DEBUG) VERSIONINFO
#else
VS_VERSION_INFO VERSIONINFO
#endif
 FILEVERSION 1,4,1,0
 PRODUCTVERSION 1,4,1,0
 FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
 FILEFLAGS 0x21L
#else
 FILEFLAGS 0x20L
#endif
 FILEOS 0x40004L
 FILETYPE 0x1L
 FILESUBTYPE 0x0L
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "040904b0"
        BEGIN
            VALUE "Comments", "\0"
            VALUE "CompanyName", "\0"
            VALUE "FileDescription", "CImage DLL\0"
            VALUE "FileVersion", "1, 4, 1, 0\0"
            VALUE "InternalName", "\0"
            VALUE "LegalCopyright", "Copyright � 2001 Troels K.\0"
            VALUE "LegalTrademarks", "\0"
            VALUE "OriginalFilename", "cimage_d.dll\0"
            VALUE "PrivateBuild", "\0"
            VALUE "ProductName", "\0"
            VALUE "ProductVersion", "1, 4, 1, 0\0"
            VALUE "SpecialBuild", "Debug Build\0"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x409, 1200
    END
END
#endif

#endif    // !_MAC

#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////



#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
#define _AFX_NO_SPLITTER_RESOURCES
#define _AFX_NO_OLE_RESOURCES
#define _AFX_NO_TRACKER_RESOURCES
#define _AFX_NO_PROPERTY_RESOURCES

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE 9, 1
#pragma code_page(1252)
#endif
#include "res\cimage.rc2"  // non-Microsoft Visual C++ edited resources
#include "afxres.rc"         // Standard components
#endif

/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

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Written By

Troels Knakkergaard

Denmark

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Drawing transparent bitmaps using CImage

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