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#include "stdafx.h"
simpledib::dib::dib()
{
memset(this, 0, sizeof(*this));
}
simpledib::dib::~dib()
{
destroy();
}
void simpledib::dib::destroy(bool del_bmp)
{
if (m_hdc && m_ownData) {
SelectObject(m_hdc, m_oldBmp);
if (del_bmp)
DeleteObject(m_bmp);
DeleteDC(m_hdc);
}
else if (m_restore_view_port && m_hdc) {
::SetWindowOrgEx(m_hdc, m_oldViewPort.x, m_oldViewPort.y, NULL);
}
memset(this, 0, sizeof(*this));
}
bool simpledib::dib::create(int width, int height, bool topdowndib)
{
destroy();
BITMAPINFO bmp_info;
bmp_info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmp_info.bmiHeader.biWidth = width;
bmp_info.bmiHeader.biHeight = height * (topdowndib ? -1 : 1);
bmp_info.bmiHeader.biPlanes = 1;
bmp_info.bmiHeader.biBitCount = 32;
bmp_info.bmiHeader.biCompression = BI_RGB;
bmp_info.bmiHeader.biSizeImage = 0;
bmp_info.bmiHeader.biXPelsPerMeter = 0;
bmp_info.bmiHeader.biYPelsPerMeter = 0;
bmp_info.bmiHeader.biClrUsed = 0;
bmp_info.bmiHeader.biClrImportant = 0;
m_hdc = CreateCompatibleDC(NULL);
m_bmp = ::CreateDIBSection(m_hdc, &bmp_info, DIB_RGB_COLORS, (LPVOID *)&m_bits, 0, 0);
if (m_bits && m_bmp) {
m_oldBmp = (HBITMAP)::SelectObject(m_hdc, m_bmp);
}
else {
DeleteDC(m_hdc);
m_hdc = nullptr;
}
if (!m_hdc)
return false;
m_width = width;
m_height = height;
m_ownData = true;
return true;
}
/*
bool simpledib::dib::create( HDC hdc, HBITMAP bmp, LPRGBQUAD bits, int width, int height, int shift_x, int shift_y )
{
destroy();
m_bmp = bmp;
m_hdc = hdc;
m_bits = bits;
m_width = width;
m_height = height;
m_ownData = FALSE;
SetWindowOrgEx(m_hdc, -shift_x, -shift_y, &m_oldViewPort);
m_restore_view_port = TRUE;
return true;
}
*/
bool simpledib::dib::create(HDC hdc, HBITMAP bmp, LPRGBQUAD bits, int width, int height)
{
destroy();
m_bmp = bmp;
m_hdc = hdc;
m_bits = bits;
m_width = width;
m_height = height;
m_ownData = m_restore_view_port = false;
return true;
}
void simpledib::dib::clear()
{
if (m_bits)
memset(m_bits, 0, m_width * m_height * 4);
}
void simpledib::dib::draw(HDC hdc, int x, int y)
{
BLENDFUNCTION bf;
bf.BlendOp = AC_SRC_OVER;
bf.BlendFlags = 0;
bf.AlphaFormat = AC_SRC_ALPHA;
bf.SourceConstantAlpha = 255;
AlphaBlend(hdc, x, y, m_width, m_height, m_hdc, 0, 0, m_width, m_height, bf);
}
void simpledib::dib::draw(HDC hdc, LPRECT rcDraw)
{
BLENDFUNCTION bf;
bf.BlendOp = AC_SRC_OVER;
bf.BlendFlags = 0;
bf.AlphaFormat = AC_SRC_ALPHA;
bf.SourceConstantAlpha = 255;
AlphaBlend(hdc,
rcDraw->left, rcDraw->top,
rcDraw->right - rcDraw->left,
rcDraw->bottom - rcDraw->top, m_hdc,
rcDraw->left, rcDraw->top,
rcDraw->right - rcDraw->left,
rcDraw->bottom - rcDraw->top,
bf);
}
HDC simpledib::dib::beginPaint(HDC hdc, LPRECT rcDraw)
{
if (!create(rcDraw->right - rcDraw->left, rcDraw->bottom - rcDraw->top, true))
return nullptr;
m_hTargetDC = hdc;
m_rcTarget = *rcDraw;
SetWindowOrgEx(m_hdc, rcDraw->left, rcDraw->top, &m_oldViewPort);
return m_hdc;
}
void simpledib::dib::endPaint(bool copy)
{
SetWindowOrgEx(m_hdc, m_oldViewPort.x, m_oldViewPort.y, NULL);
if (!copy) {
BLENDFUNCTION bf = {};
bf.BlendOp = AC_SRC_OVER;
bf.AlphaFormat = AC_SRC_ALPHA;
bf.SourceConstantAlpha = 255;
AlphaBlend(m_hTargetDC, m_rcTarget.left, m_rcTarget.top,
m_rcTarget.right - m_rcTarget.left,
m_rcTarget.bottom - m_rcTarget.top, m_hdc,
0, 0,
m_rcTarget.right - m_rcTarget.left,
m_rcTarget.bottom - m_rcTarget.top,
bf);
}
else {
BitBlt(m_hTargetDC, m_rcTarget.left, m_rcTarget.top,
m_rcTarget.right - m_rcTarget.left,
m_rcTarget.bottom - m_rcTarget.top, m_hdc, 0, 0, SRCCOPY);
}
m_hTargetDC = NULL;
destroy();
}
HBITMAP simpledib::dib::detach_bitmap()
{
HBITMAP bmp = m_bmp;
destroy(false);
return bmp;
}
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