MgPath& MgPath::reverse()
{
if (getSubPathCount() > 1) {
MgPath subpath;
std::list<MgPath> paths;
for (size_t i = 0; i < m_data->types.size(); i++) {
if (m_data->types[i] == kMgMoveTo && subpath.getCount() > 0) {
paths.push_back(subpath);
subpath.clear();
}
subpath.m_data->types.push_back(m_data->types[i]);
subpath.m_data->points.push_back(m_data->points[i]);
}
if (subpath.getCount() > 0) {
paths.push_back(subpath);
}
clear();
for (std::list<MgPath>::reverse_iterator it = paths.rbegin(); it != paths.rend(); ++it) {
append(it->reverse());
}
} else {
for (int i = 0, j = getCount() - 1; i < j; i++, j--) {
if (i > 0) {
mgSwap(m_data->types[i], m_data->types[j]);
}
mgSwap(m_data->points[i], m_data->points[j]);
}
}
return *this;
}
bool GiCanvasGdi::drawImage(long hmWidth, long hmHeight, HBITMAP hbitmap,
const Box2d& rectW, bool fast)
{
BOOL ret = FALSE;
HDC hdc = m_draw->getDrawDC();
if (hdc != NULL && hmWidth > 0 && hmHeight > 0 && hbitmap != NULL
&& m_owner->getClipWorld().isIntersect(Box2d(rectW, true)))
{
RECT_2D clipBox;
RECT rc, rcDraw, rcFrom;
// rc: 整个图像对应的显示坐标区域
(rectW * xf().worldToDisplay()).get(rc);
// rcDraw: 图像经剪裁后的可显示部分
Box2d(gs()->getClipBox(clipBox)).get(rcFrom);
if (!IntersectRect(&rcDraw, &rc, &rcFrom))
return false;
long width, height; // pixel units
width = MulDiv(hmWidth, GetDeviceCaps(hdc, LOGPIXELSX), 2540);
height = MulDiv(hmHeight, GetDeviceCaps(hdc, LOGPIXELSY), 2540);
// rcFrom: rcDraw在原始图像上对应的图像范围
rcFrom.left = MulDiv(rcDraw.left - rc.left, width, rc.right - rc.left);
rcFrom.top = MulDiv(rcDraw.top - rc.top, height, rc.bottom - rc.top);
rcFrom.right = MulDiv(rcDraw.right - rc.left, width, rc.right - rc.left);
rcFrom.bottom = MulDiv(rcDraw.bottom - rc.top, height, rc.bottom - rc.top);
// 根据rectW正负决定是否颠倒显示图像
if (rectW.xmin > rectW.xmax)
mgSwap(rcDraw.left, rcDraw.right);
if (rectW.ymin > rectW.ymax)
mgSwap(rcDraw.top, rcDraw.bottom);
GiCompatibleDC memDC (hdc);
if (memDC == NULL)
return false;
KGDIObject bmp (memDC, hbitmap, false);
KGDIObject brush (hdc, ::GetStockObject(NULL_BRUSH), false);
int nBltMode = (!fast || m_owner->isPrint()) ? HALFTONE : COLORONCOLOR;
int nOldMode = ::SetStretchBltMode(hdc, nBltMode);
::SetBrushOrgEx(hdc, rcDraw.left % 8, rcDraw.top % 8, NULL);
ret = ::StretchBlt(hdc,
rcDraw.left, rcDraw.top,
rcDraw.right - rcDraw.left,
rcDraw.bottom - rcDraw.top,
memDC,
rcFrom.left, rcFrom.top,
rcFrom.right - rcFrom.left,
rcFrom.bottom - rcFrom.top,
SRCCOPY);
::SetStretchBltMode(hdc, nOldMode);
}
return ret ? true : false;
}
bool GiCanvasGdipImpl::drawImage(G::Bitmap* pBmp, const Box2d& rectW, bool fast)
{
RECT_2D rc, rcDraw, rcFrom;
Box2d rect;
float width = (float)pBmp->GetWidth();
float height = (float)pBmp->GetHeight();
// rc: 整个图像对应的显示坐标区域
(rectW * gs()->xf().worldToDisplay()).get(rc);
// rcDraw: 图像经剪裁后的可显示部分
gs()->getClipBox(rcDraw);
if (rect.intersectWith(Box2d(rc), Box2d(rcDraw)).isEmpty())
return false;
rect.get(rcDraw);
// rcFrom: rcDraw在原始图像上对应的图像范围
rcFrom.left = (rcDraw.left - rc.left) * width / (rc.right - rc.left);
rcFrom.top = (rcDraw.top - rc.top) * height / (rc.bottom - rc.top);
rcFrom.right = (rcDraw.right - rc.left) * width / (rc.right - rc.left);
rcFrom.bottom = (rcDraw.bottom - rc.top) * height / (rc.bottom - rc.top);
// 根据rectW正负决定是否颠倒显示图像
if (rectW.xmin > rectW.xmax)
mgSwap(rcDraw.left, rcDraw.right);
if (rectW.ymin > rectW.ymax)
mgSwap(rcDraw.top, rcDraw.bottom);
G::InterpolationMode nOldMode = getDrawGs()->GetInterpolationMode();
getDrawGs()->SetInterpolationMode( (!fast || gs()->isPrint())
? G::InterpolationModeBilinear : G::InterpolationModeLowQuality);
G::Status ret = getDrawGs()->DrawImage(pBmp,
G::RectF(rcDraw.left, rcDraw.top,
rcDraw.right - rcDraw.left,
rcDraw.bottom - rcDraw.top),
rcFrom.left, rcFrom.top,
rcFrom.right - rcFrom.left,
rcFrom.bottom - rcFrom.top,
G::UnitPixel);
getDrawGs()->SetInterpolationMode(nOldMode);
return G::Ok == ret;
}
void GiTransform::setViewScaleRange(float minScale, float maxScale)
{
if (minScale > maxScale)
mgSwap(minScale, maxScale);
minScale = mgMax(minScale, 1e-5f);
minScale = mgMin(minScale, 0.5f);
maxScale = mgMax(maxScale, 1.f);
maxScale = mgMin(maxScale, 50.f);
m_impl->minViewScale = minScale;
m_impl->maxViewScale = maxScale;
}
int mgcurv::arcToBezier(
Point2d points[16], const Point2d& center, float rx, float ry,
float startAngle, float sweepAngle)
{
if (mgIsZero(rx) || fabsf(sweepAngle) < 1e-5)
return 0;
if (mgIsZero(ry))
ry = rx;
if (sweepAngle > _M_2PI)
sweepAngle = _M_2PI;
else if (sweepAngle < -_M_2PI)
sweepAngle = -_M_2PI;
int n = 0;
if (fabsf(sweepAngle) < _M_PI_2 + 1e-5)
{
_arcToBezier(points, center, rx, ry, startAngle, sweepAngle);
n = 4;
}
else if (sweepAngle > 0)
{
startAngle = mgbase::to0_2PI(startAngle);
n = _arcToBezierPlusSweep(
points, center, rx, ry, startAngle, sweepAngle);
}
else // sweepAngle < 0
{
float endAngle = startAngle + sweepAngle;
sweepAngle = -sweepAngle;
startAngle = mgbase::to0_2PI(endAngle);
n = _arcToBezierPlusSweep(
points, center, rx, ry, startAngle, sweepAngle);
for (int i = 0; i < n / 2; i++)
mgSwap(points[i], points[n - 1 - i]);
}
return n;
}
bool MgArc::_reverse()
{
mgSwap(_points[1], _points[2]);
return true;
}