Hi,
Here is my code;
If I comment out;
and I have 0 , 0 instead of offsetx and offsety in the bitBlt, I get the following output;
https://hostr.co/file/970/g60huNooRd...t7.56.10PM.png
If I uncomment the selectObject and use offsetx and offsety in the bitBlt, I get the following output;
https://hostr.co/file/970/jnKBVc0AJx...t7.58.06PM.png
The second image is of a bitmap that is being scrolled down.
I return TRUE in EraseBckgrnd.
How can I fix this? I literally have tried everything.
If I use nPosX and nPosY, only one bitmap is rendered on the screen.
All help is appreciated.
Here is my code;
Code:
void RenderPage(CDC* pDC)
{
COLORREF clrBackground = RGB(120, 120, 120);
CRect rcClient;
CSize m_size;
CPoint m_pt;
GetClientRect(&rcClient);
m_size.cx = rcClient.Width();
m_size.cy = rcClient.Height();
if (checkInitialization)
{
COLORREF clrPage = RGB(255, 255, 255);
COLORREF clrFrame = GetSysColor(COLOR_WINDOWFRAME);
CBitmap* bmpOriginal = NULL;
HBITMAP m_hBmpOld = NULL;
HBITMAP m_hBmpNew = NULL;
BITMAP m_bmInfo;
SCROLLINFO scrollInfo;
GetScrollInfo(SB_VERT, &scrollInfo);
int nPosY = scrollInfo.nPos;
GetScrollInfo(SB_HORZ, &scrollInfo);
int nPosX = scrollInfo.nPos;
m_pt.x = rcClient.left;
m_pt.y = rcClient.top;
int offsetx = m_pt.x;
int offsety = m_pt.y;
CDC dcBuffer;
CBitmap bmpBuffer;
dcBuffer.CreateCompatibleDC(pDC);
bmpBuffer.CreateCompatibleBitmap(pDC, rcClient.Width(), rcClient.Height());
dcBuffer.SelectObject(bmpBuffer);
dcBuffer.FillSolidRect(&rcClient, clrBackground);
for (UINT nPage = 0; nPage < m_nTotalPages; nPage++)
{
if (
(m_PageInfo[nPage].m_nPageStartY >= nPosY && m_PageInfo[nPage].m_nPageStartY <= nPosY + rcClient.Height()) ||
(m_PageInfo[nPage].m_nPageEndY >= nPosY && m_PageInfo[nPage].m_nPageEndY <= nPosY + rcClient.Height()) ||
(m_PageInfo[nPage].m_nPageStartY <= nPosY && m_PageInfo[nPage].m_nPageEndY >= nPosY + rcClient.Height())
)
{
switch (scaleType)
{
case scaling::eFitWidth:
m_hBmpNew = jmSDK->createImageFromPage(m_PageInfo[nPage].m_nPageNum, m_size.cx * m_dbScaleFactor, 0, m_PageInfo[nPage].m_nRotation);
break;
case scaling::eFitPage:
m_hBmpNew = jmSDK->createImageFromPage(m_PageInfo[nPage].m_nPageNum, 0, m_size.cy * m_dbScaleFactor, m_PageInfo[nPage].m_nRotation);
break;
case scaling::eFitActual:
default:
m_hBmpNew = jmSDK->createImageFromPage(m_PageInfo[nPage].m_nPageNum, 0, m_size.cx, m_PageInfo[nPage].m_nRotation);
break;
}
HBITMAP CreateCompatibleBitmap(m_hBmpNew);
m_hBmpOld = (HBITMAP)SelectObject(dcBuffer, m_hBmpNew);
GetObject(m_hBmpNew, sizeof(BITMAP), &m_bmInfo);
if (m_bmInfo.bmWidth <= m_size.cx)
{
if (m_size.cx - m_bmInfo.bmWidth == 0)
offsetx = m_pt.x;
else
offsetx = m_pt.x + (m_size.cx - m_bmInfo.bmWidth) / 2;
}
if (m_bmInfo.bmHeight <= m_size.cy)
{
if ((m_size.cy - m_bmInfo.bmHeight) == 0)
offsety = m_pt.y;
else
offsety = m_pt.y + ((m_size.cy - m_bmInfo.bmHeight) / 2);
}
try
{
pDC->FillSolidRect(&rcClient, clrBackground);
}
catch (Error &e)
{
}
}
else
{
}
}
bmpOriginal = (CBitmap*)pDC->SelectObject(bmpBuffer);
pDC->BitBlt(offsetx, offsety, rcClient.Width(), rcClient.Height(), &dcBuffer, 0, 0, SRCCOPY);
pDC->SelectObject(bmpOriginal);
dcBuffer.DeleteDC();
bmpBuffer.DeleteObject();
}
else
pDC->FillSolidRect(&rcClient, clrBackground);
}Code:
m_hBmpOld = (HBITMAP)SelectObject(dcBuffer, m_hBmpNew);https://hostr.co/file/970/g60huNooRd...t7.56.10PM.png
If I uncomment the selectObject and use offsetx and offsety in the bitBlt, I get the following output;
https://hostr.co/file/970/jnKBVc0AJx...t7.58.06PM.png
The second image is of a bitmap that is being scrolled down.
I return TRUE in EraseBckgrnd.
How can I fix this? I literally have tried everything.
If I use nPosX and nPosY, only one bitmap is rendered on the screen.
All help is appreciated.
