SimpleImage Sample: Loads, Resizes, Converts, and Saves Images
The SimpleImage sample shows how to use the CImage class to load, display, and save a variety of different image formats, including .bmp, .gif, .jpg, and .png. It shows how CImage can be used to manipulate the image in various ways, and how to extract information about the image. SimpleImage uses the CFileDialog class to present the user with the standard Windows dialog boxes for loading and saving files of various formats. The sample creates a docking toolbar using the CToolBar class. The toolbar displays a set of buttons for resizing the image.
This sample code is intended to illustrate a concept, and it shows only the code that is relevant to that concept. It may not meet the security requirements for a specific environment, and it should not be used exactly as shown. We recommend that you add security and error-handling code to make your projects more secure and robust. Microsoft provides this sample code "AS IS" with no warranties.
To get samples and instructions for installing them:
To access samples from Visual Studio
On the Help menu, click Samples.
By default, these samples are installed in drive:\Program Files\Microsoft Visual Studio 10.0\Samples\.
- For the most recent version of this sample and a list of other samples, see Visual Studio Samples on the MSDN Web site.
Building and Running the Sample
To build and run the SimpleImage sample
Open the solution SimpleImage.sln.
On the Build menu, click Build.
On the Debug menu, click Start Without Debugging.
The sample is a simple application that allows you to do the following:
Load an image from disk in a variety of formats.
Resize the image and convert it from color to grayscale.
Save the image in several image formats.
Classes and Keywords
This sample demonstrates the following classes:
CImage, CString, CPaintDC, CDialog, CFileDialog, CToolBar, CStatic
This sample demonstrates the following keywords:
CToolBar::SetButtonInfo, CToolBar::SetButtons, CToolBar::LoadToolBar, CToolBar::EnableDocking, CImage::GetWidth, CImage::GetHeight, CImage::StretchBlt, CImage::GetExporterFilterSting, CImage::Load, CImage::Save, CImage::IsIndexed, CImage::GetPixel, CImage::SetPixelRGB, CImage::GetMaxColorTableEntries, CImage::GetColorTable, CImage::IsNull, CImage::GetBPP, CImage::IsDIBSection, CImage::GetPitch, CCmdUI::Enable, CCmdUI::SetCheck, CStatic::SendMessage, CWnd::GetClientRect, CWnd::GetDlgItem, sprintf_s