bool GiGraphics::drawRoundRect(const GiContext* ctx,
const Box2d& rect, float rx, float ry,
bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || rect.isEmpty())
return false;
GiLock lock (&m_impl->drawRefcnt);
bool ret = false;
if (ry < _MGZERO)
ry = rx;
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(rect)) // 全部在显示区域外
return false;
if (rx < _MGZERO)
{
Point2d points[4] = {
rect.leftBottom(), rect.rightBottom(),
rect.rightTop(), rect.leftTop()
};
return drawPolygon(ctx, 4, points);
}
else
{
Point2d points[16];
mgRoundRectToBeziers(points, rect, rx, ry);
S2D(xf(), modelUnit).TransformPoints(16, points);
ret = rawBeginPath();
if (ret)
{
ret = rawMoveTo(points[0].x, points[0].y);
ret = rawBezierTo(&points[1], 3);
ret = rawLineTo(points[4].x, points[4].y);
ret = rawBezierTo(&points[5], 3);
ret = rawLineTo(points[8].x, points[8].y);
ret = rawBezierTo(&points[9], 3);
ret = rawLineTo(points[12].x, points[12].y);
ret = rawBezierTo(&points[13], 3);
ret = rawClosePath();
ret = rawEndPath(ctx, true);
}
}
return ret;
}
bool GiGraphics::drawRoundRect(const GiContext* ctx,
const Box2d& rect, float rx, float ry,
bool modelUnit)
{
if (rect.isEmpty() || isStopping())
return false;
bool ret = false;
if (ry < _MGZERO)
ry = rx;
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(rect)) // 全部在显示区域外
return false;
if (rx < _MGZERO) {
Point2d points[4] = {
rect.leftBottom(), rect.rightBottom(),
rect.rightTop(), rect.leftTop()
};
return drawPolygon(ctx, 4, points);
} else {
Point2d pxs[16];
mgcurv::roundRectToBeziers(pxs, rect, rx, ry);
S2D(xf(), modelUnit).transformPoints(16, pxs);
ret = rawBeginPath();
if (ret) {
rawMoveTo(pxs[0].x, pxs[0].y);
rawBezierTo(pxs[1].x, pxs[1].y, pxs[2].x, pxs[2].y, pxs[3].x, pxs[3].y);
rawLineTo(pxs[4].x, pxs[4].y);
rawBezierTo(pxs[5].x, pxs[5].y, pxs[6].x, pxs[6].y, pxs[7].x, pxs[7].y);
rawLineTo(pxs[8].x, pxs[8].y);
rawBezierTo(pxs[9].x, pxs[9].y, pxs[10].x, pxs[10].y, pxs[11].x, pxs[11].y);
rawLineTo(pxs[12].x, pxs[12].y);
rawBezierTo(pxs[13].x, pxs[13].y, pxs[14].x, pxs[14].y, pxs[15].x, pxs[15].y);
rawClosePath();
ret = rawEndPath(ctx, true);
}
}
return ret;
}
bool GiGraphics::drawPath_(const GiContext* ctx, const MgPath& path, bool fill, const Matrix2d& matD)
{
int n = path.getCount();
if (n == 0 || isStopping())
return false;
const Point2d* pts = path.getPoints();
const char* types = path.getTypes();
Point2d ends, cp1, cp2;
bool matsame = matD.isIdentity();
rawBeginPath();
for (int i = 0; i < n; i++) {
switch (types[i] & ~kMgCloseFigure) {
case kMgMoveTo:
ends = matsame ? pts[i] : (pts[i] * matD);
rawMoveTo(ends.x, ends.y);
break;
case kMgLineTo:
ends = matsame ? pts[i] : (pts[i] * matD);
rawLineTo(ends.x, ends.y);
break;
case kMgBezierTo:
if (i + 2 >= n)
return false;
cp1 = matsame ? pts[i] : (pts[i] * matD);
cp2 = matsame ? pts[i+1] : (pts[i+1] * matD);
ends = matsame ? pts[i+2] : (pts[i+2] * matD);
rawBezierTo(cp1.x, cp1.y, cp2.x, cp2.y, ends.x, ends.y);
i += 2;
break;
case kMgQuadTo:
if (i + 1 >= n)
return false;
cp1 = matsame ? pts[i] : (pts[i] * matD);
ends = matsame ? pts[i+1] : (pts[i+1] * matD);
rawQuadTo(cp1.x, cp1.y, ends.x, ends.y);
i++;
break;
default:
return false;
}
if (types[i] & kMgCloseFigure)
rawClosePath();
}
return rawEndPath(ctx, fill);
}
bool GiGraphics::drawQuadSplines(const GiContext* ctx, int count,
const Point2d* ctlpts, bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || count < 3 || ctlpts == NULL)
return false;
GiLock lock (&m_impl->drawRefcnt);
const Box2d wndrect (DRAW_RECT(m_impl, modelUnit));
const Matrix2d matD(S2D(xf(), modelUnit));
Point2d mid1, mid2, pt, pt2;
int n = 0;
rawBeginPath();
for (int i = 0; i + 2 < count; i++) {
if (Box2d(3, ctlpts + i).isIntersect(wndrect)) {
pt2 = ctlpts[i+2];
mid1 = (ctlpts[i] + ctlpts[i+1]) / 2 * matD;
mid2 = (ctlpts[i+1] + pt2) / 2 * matD;
if (n++ == 0) {
pt = ctlpts[i] * matD;
rawMoveTo(pt.x, pt.y);
rawLineTo(mid1.x, mid1.y);
}
pt = ctlpts[i+1] * matD;
rawQuadTo(pt.x, pt.y, mid2.x, mid2.y);
}
else if (n > 0) {
pt = pt2 * matD;
rawLineTo(pt.x, pt.y);
n = 0;
}
}
if (n > 0) {
pt = pt2 * matD;
rawLineTo(pt.x, pt.y);
}
return rawEndPath(ctx, false);
}
bool GiGraphics::drawPath(const GiContext* ctx, const GiPath& path,
bool fill, bool modelUnit)
{
int n = path.getCount();
if (n == 0)
return false;
Matrix2d matD(S2D(xf(), modelUnit));
const Point2d* pts = path.getPoints();
const char* types = path.getTypes();
Point2d a, b, c;
rawBeginPath();
for (int i = 0; i < n; i++) {
switch (types[i] & ~kGiCloseFigure) {
case kGiMoveTo:
a = pts[i] * matD;
rawMoveTo(a.x, a.y);
break;
case kGiLineTo:
a = pts[i] * matD;
rawLineTo(a.x, a.y);
break;
case kGiBeziersTo:
if (i + 2 >= n)
return false;
a = pts[i] * matD;
b = pts[i+1] * matD;
c = pts[i+2] * matD;
rawBezierTo(a.x, a.y, b.x, b.y, c.x, c.y);
i += 2;
break;
default:
return false;
}
if (types[i] & kGiCloseFigure)
rawClosePath();
}
return rawEndPath(ctx, fill);
}
bool GiGraphics::drawPie(const GiContext* ctx,
const Point2d& center, float rx, float ry,
float startAngle, float sweepAngle,
bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || rx < _MGZERO || fabsf(sweepAngle) < 1e-5f)
return false;
GiLock lock (&m_impl->drawRefcnt);
if (ry < _MGZERO)
ry = rx;
const Box2d extent (center, rx*2.f, ry*2.f); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
Point2d pxs[16];
int count = mgcurv::arcToBezier(pxs, center,
rx, ry, startAngle, sweepAngle);
if (count < 4)
return false;
S2D(xf(), modelUnit).TransformPoints(count, pxs);
Point2d cen(center * S2D(xf(), modelUnit));
bool ret = rawBeginPath();
if (ret)
{
rawMoveTo(cen.x, cen.y);
rawLineTo(pxs[0].x, pxs[0].y);
for (int i = 1; i + 2 < count; i += 3) {
rawBezierTo(pxs[i].x, pxs[i].y,
pxs[i+1].x, pxs[i+1].y, pxs[i+2].x, pxs[i+2].y);
}
rawClosePath();
ret = rawEndPath(ctx, true);
}
return ret;
}
