reactos/base/applications/mspaint/dib.cpp

   1 /*
   2  * PROJECT:     PAINT for ReactOS
   3  * LICENSE:     LGPL
   4  * FILE:        base/applications/mspaint/dib.cpp
   5  * PURPOSE:     Some DIB related functions
   6  * PROGRAMMERS: Benedikt Freisen
   7  */
   8
   9 /* INCLUDES *********************************************************/
  10
  11 #include "precomp.h"
  12
  13 /* FUNCTIONS ********************************************************/
  14
  15 HBITMAP
  16 CreateDIBWithProperties(int width, int height)
  17 {
  18     BITMAPINFO bmi;
  19     ZeroMemory(&bmi, sizeof(BITMAPINFO));
  20     bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
  21     bmi.bmiHeader.biWidth = width;
  22     bmi.bmiHeader.biHeight = height;
  23     bmi.bmiHeader.biPlanes = 1;
  24     bmi.bmiHeader.biBitCount = 24;
  25     bmi.bmiHeader.biCompression = BI_RGB;
  26     return CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, NULL, NULL, 0);
  27 }
  28
  29 int
  30 GetDIBWidth(HBITMAP hBitmap)
  31 {
  32     BITMAP bm;
  33     GetObject(hBitmap, sizeof(BITMAP), &bm);
  34     return bm.bmWidth;
  35 }
  36
  37 int
  38 GetDIBHeight(HBITMAP hBitmap)
  39 {
  40     BITMAP bm;
  41     GetObject(hBitmap, sizeof(BITMAP), &bm);
  42     return bm.bmHeight;
  43 }
  44
  45 void
  46 SaveDIBToFile(HBITMAP hBitmap, LPTSTR FileName, HDC hDC, LPSYSTEMTIME time, int *size, int hRes, int vRes)
  47 {
  48     CImage img;
  49     img.Attach(hBitmap);
  50     img.Save(FileName);  // TODO: error handling
  51     img.Detach();
  52
  53     // update time and size
  54
  55     HANDLE hFile =
  56         CreateFile(FileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
  57     if (hFile == INVALID_HANDLE_VALUE)
  58         return;
  59
  60     if (time)
  61     {
  62         FILETIME ft;
  63         GetFileTime(hFile, NULL, NULL, &ft);
  64         FileTimeToSystemTime(&ft, time);
  65     }
  66     if (size)
  67         *size = GetFileSize(hFile, NULL);
  68
  69     // TODO: update hRes and vRes
  70
  71     CloseHandle(hFile);
  72 }
  73
  74 void ShowFileLoadError(LPCTSTR name)
  75 {
  76     CString strText;
  77     strText.Format(IDS_LOADERRORTEXT, (LPCTSTR) name);
  78     CString strProgramName;
  79     strProgramName.LoadString(IDS_PROGRAMNAME);
  80     mainWindow.MessageBox(strText, strProgramName, MB_OK | MB_ICONEXCLAMATION);
  81 }
  82
  83 void
  84 LoadDIBFromFile(HBITMAP * hBitmap, LPCTSTR name, LPSYSTEMTIME time, int *size, int *hRes, int *vRes)
  85 {
  86     CImage img;
  87     img.Load(name);  // TODO: error handling
  88
  89     if (!hBitmap)
  90     {
  91         ShowFileLoadError(name);
  92         return;
  93     }
  94
  95     *hBitmap = img.Detach();
  96
  97     // update time and size
  98     HANDLE hFile =
  99         CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
 100     if (hFile == INVALID_HANDLE_VALUE)
 101     {
 102         ShowFileLoadError(name);
 103         return;
 104     }
 105
 106     if (time)
 107     {
 108         FILETIME ft;
 109         GetFileTime(hFile, NULL, NULL, &ft);
 110         FileTimeToSystemTime(&ft, time);
 111     }
 112     if (size)
 113         *size = GetFileSize(hFile, NULL);
 114
 115     // TODO: update hRes and vRes
 116
 117     CloseHandle(hFile);
 118 }