Creating Color Bitmap From Scratch

Environment:VC6

How do you create a color bitmap from scratch? You need to be able to make the bitmap without .bmp file or resource. Using CreateBitmap or CreateBitmapIndirect creates monochrome bitmaps, unless you have HDC that can handle color bitmaps. However, creating HDC by CreateCompatibleDC(NULL) gives you simple HDC that contains 1x1 monochrome bitmap. Following is the source code shows how to create color bitmap from scratch using CreateDIBSection:

HDC dc= CreateCompatibleDC(NULL);
BITMAPINFO i;
ZeroMemory( &i.bmiHeader, sizeof(BITMAPINFOHEADER) );
i.bmiHeader.biWidth=5;     // Set size you need
i.bmiHeader.biHeight=5;    // Set size you need
i.bmiHeader.biPlanes=1;
i.bmiHeader.biBitCount=24; // Can be 8, 16, 32 bpp or 
                           // other number
i.bmiHeader.biSizeImage=0;
i.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
i.bmiHeader.biClrUsed= 0;
i.bmiHeader.biClrImportant= 0;
VOID *pvBits;
HBITMAP hbmp= CreateDIBSection( dc,
                                &i,
                                DIB_RGB_COLORS,
                                &pvBits,
                                NULL,
                                0 );
// You don't have to use 'pvBits', later DeleteObject(hbmp)
// will free this bit array.


Comments

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Live Event Date: March 19, 2015 @ 1:00 p.m. ET / 10:00 a.m. PT The 2015 Enterprise Mobile Application Survey asked 250 mobility professionals what their biggest mobile challenges are, how many employees they are equipping with mobile apps, and their methods for driving value with mobility. Join Dan Woods, Editor and CTO of CITO Research, and Alan Murray, SVP of Products at Apperian, as they break down the results of this survey and discuss how enterprises are using mobile application management and private …

  • On-demand Event Event Date: February 12, 2015 The evolution of systems engineering with the SysML modeling language has resulted in improved requirements specification, better architectural definition, and better hand-off to downstream engineering. Agile methods have proven successful in the software domain, but how can these methods be applied to systems engineering? Check out this webcast and join Bruce Powel Douglass, author of Real-Time Agility, as he discusses how agile methods have had a tremendous …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date