在MFC中创建DIBSection并使用图片控件进行渲染
我使用调用 CreateDIBSection
在 MFC 中创建 DIB 部分。我从调用中获得一个 HBITMAP
,并将其传递到 MFC 项目中的另一个对话框。在另一个对话框中,我使用 CStatic::SetBitmap(HBITMAP) 调用来渲染位图。但由于某种原因我看不到任何东西。如果这是在同一个对话框中完成的,那么效果非常好,但我想在一个对话框中创建位图并在另一个对话框中显示。
创建 DIBSection 的代码是
//-----------------BEGINNING OF FIRST DIALOG--------------------------------------------------
LPVOID pViewBitmapBits = NULL;
BITMAPINFOHEADER BMHeaderInfo;
memset(&BMHeaderInfo, 0, sizeof(BITMAPINFOHEADER));
BMHeaderInfo.biSize = sizeof(BITMAPINFOHEADER);
BMHeaderInfo.biWidth = 800;
BMHeaderInfo.biHeight = 400;
BMHeaderInfo.biPlanes = 1;
BMHeaderInfo.biBitCount = 8;
BMHeaderInfo.biCompression = BI_RGB;
BMHeaderInfo.biSizeImage = 0;
BMHeaderInfo.biClrUsed = 0;
BMHeaderInfo.biClrImportant= 0;
BITMAPINFO BMInfo;
memset(&BMInfo, 0, sizeof(BMInfo));
BMInfo.bmiHeader = BMHeaderInfo;
BMInfo.bmiColors[0].rgbBlue=255;
HBITMAP hGlobalBitMap = CreateDIBSection(m_pParentSheet->test.m_hDC, &BMInfo, DIB_RGB_COLORS, &pViewBitmapBits, NULL, NULL);
SelectObject(m_pParentSheet->test.m_hDC, hGlobalBitMap);
//--------------------------END OF FIRST DIALOG----------------------------------
//-----------------------------BEGINNING OF SECOND DIALOG----------------------------------------
void CreateViewDlg::OnBnClickedButton2()
{
m_pic.SetBitmap(hGlobalBitMap );
}
//------------------------------------END OF SECOND DIALOG---------------------------------
Please help me with this。 HBITMAP
句柄的使用有任何限制吗?
I'm creating a DIB Section in MFC using the call CreateDIBSection
. I get a HBITMAP
from the call which I pass onto another dialog in my MFC Project. In the other dialog I'm using CStatic::SetBitmap(HBITMAP)
call to render the bitmap. But for some reason I'm not able to see anything. This works perfectly fine if this is done in same dialog, but I want to create bitmap in one dialog and display in another.
The code for creating the DIBSection is
//-----------------BEGINNING OF FIRST DIALOG--------------------------------------------------
LPVOID pViewBitmapBits = NULL;
BITMAPINFOHEADER BMHeaderInfo;
memset(&BMHeaderInfo, 0, sizeof(BITMAPINFOHEADER));
BMHeaderInfo.biSize = sizeof(BITMAPINFOHEADER);
BMHeaderInfo.biWidth = 800;
BMHeaderInfo.biHeight = 400;
BMHeaderInfo.biPlanes = 1;
BMHeaderInfo.biBitCount = 8;
BMHeaderInfo.biCompression = BI_RGB;
BMHeaderInfo.biSizeImage = 0;
BMHeaderInfo.biClrUsed = 0;
BMHeaderInfo.biClrImportant= 0;
BITMAPINFO BMInfo;
memset(&BMInfo, 0, sizeof(BMInfo));
BMInfo.bmiHeader = BMHeaderInfo;
BMInfo.bmiColors[0].rgbBlue=255;
HBITMAP hGlobalBitMap = CreateDIBSection(m_pParentSheet->test.m_hDC, &BMInfo, DIB_RGB_COLORS, &pViewBitmapBits, NULL, NULL);
SelectObject(m_pParentSheet->test.m_hDC, hGlobalBitMap);
//--------------------------END OF FIRST DIALOG----------------------------------
//-----------------------------BEGINNING OF SECOND DIALOG----------------------------------------
void CreateViewDlg::OnBnClickedButton2()
{
m_pic.SetBitmap(hGlobalBitMap );
}
//------------------------------------END OF SECOND DIALOG---------------------------------
Please help me with this. Is there any limitation to the usage of HBITMAP
Handles?
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看起来像局部变量隐藏了全局变量。
Looks like local variable hiding the global variable.