void doEgg(CGContextRef context)
{
CGPoint p0 = {0., 0.}, p1 = {0., 200.};
CGPoint c1 = {140., 5.}, c2 = {80., 198.};
CGContextTranslateCTM(context, 100., 5.);
CGContextBeginPath(context);
CGContextMoveToPoint(context, p0.x, p0.y);
// Create the BŽzier path segment for the right side of the egg.
CGContextAddCurveToPoint(context, c1.x, c1.y, c2.x, c2.y, p1.x, p1.y);
// Create the BŽzier path segment for the left side of the egg.
CGContextAddCurveToPoint(context, -c2.x, c2.y, -c1.x, c1.y, p0.x, p0.y);
CGContextClosePath(context);
CGContextSetLineWidth(context, 2);
CGContextDrawPath(context, kCGPathStroke);
}
// Handles a curve drawing operation for cubic (Type 1 / Postscript) outlines
//
// The curve is a Bezier patch defined by two off-curve control points (pt1 and pt2), and an endpoint (pt3).
// The starting point is whatever the current pen position is.
//
OSStatus MyCubicCurveToProc(const Float32Point *pt1, const Float32Point *pt2, const Float32Point *pt3, void *callBackDataPtr)
{
// Adjust the points according to the glyph origin
float x1 = ((MyCurveCallbackData *)callBackDataPtr)->origin.x + pt1->x;
float y1 = ((MyCurveCallbackData *)callBackDataPtr)->origin.y + pt1->y;
float x2 = ((MyCurveCallbackData *)callBackDataPtr)->origin.x + pt2->x;
float y2 = ((MyCurveCallbackData *)callBackDataPtr)->origin.y + pt2->y;
float x3 = ((MyCurveCallbackData *)callBackDataPtr)->origin.x + pt3->x;
float y3 = ((MyCurveCallbackData *)callBackDataPtr)->origin.y + pt3->y;
// Draw a curve according to the points
y1 = ((MyCurveCallbackData *)callBackDataPtr)->windowHeight - y1;
y2 = ((MyCurveCallbackData *)callBackDataPtr)->windowHeight - y2;
y3 = ((MyCurveCallbackData *)callBackDataPtr)->windowHeight - y3;
CGContextAddCurveToPoint(((MyCurveCallbackData *)callBackDataPtr)->context, x1, y1, x2, y2, x3, y3);
// Keep track of the current pen position (used to filter degenerate cases)
((MyCurveCallbackData *)callBackDataPtr)->current.x = x3;
((MyCurveCallbackData *)callBackDataPtr)->current.y = y3;
// Update counters and return
if (gOutputNumSegments) segmentCount++;
if (gOutputNumOps) curveToCount++;
return noErr;
}
void CFX_QuartzDeviceDriver::setPathToContext(const CFX_PathData* pathData)
{
FX_INT32 count = pathData->GetPointCount();
FX_PATHPOINT* points = pathData->GetPoints();
CGContextBeginPath(_context);
for (FX_INT32 i = 0; i < count; i ++) {
switch (points[i].m_Flag & FXPT_TYPE) {
case FXPT_MOVETO:
CGContextMoveToPoint(_context, points[i].m_PointX, points[i].m_PointY);
break;
case FXPT_LINETO:
CGContextAddLineToPoint(_context, points[i].m_PointX, points[i].m_PointY);
break;
case FXPT_BEZIERTO: {
CGContextAddCurveToPoint(_context,
points[i].m_PointX, points[i].m_PointY,
points[i + 1].m_PointX, points[i + 1].m_PointY,
points[i + 2].m_PointX, points[i + 2].m_PointY);
i += 2;
}
}
if (points[i].m_Flag & FXPT_CLOSEFIGURE) {
CGContextClosePath(_context);
}
}
}
static void
quartzgen_bezier(GVJ_t *job, pointf *A, int n, int arrow_at_start,
int arrow_at_end, int filled)
{
/* convert bezier into the current path */
CGContextRef context = (CGContextRef)job->context;
CGContextMoveToPoint(context, A[0].x, A[0].y);
int i;
for (i = 1; i < n; i += 3)
CGContextAddCurveToPoint(context, A[i].x, A[i].y, A[i+1].x, A[i+1].y, A[i+2].x, A[i+2].y);
/* draw the ellipse */
quartzgen_path(job, filled);
}
bool GiCanvasIos::rawBezierTo(const Point2d* pxs, int count)
{
bool ret = pxs && count > 2;
for (int i = 0; i + 2 < count; i += 3)
{
CGContextAddCurveToPoint(m_draw->getContext(),
pxs[i+0].x, pxs[i+0].y,
pxs[i+1].x, pxs[i+1].y,
pxs[i+2].x, pxs[i+2].y);
}
return ret;
}
bool GiCanvasIos::rawPath(const GiContext* ctx,
int count, const Point2d* pxs, const UInt8* types)
{
CGContextBeginPath(m_draw->getContext());
for (int i = 0; i < count; i++)
{
switch (types[i] & ~kGiCloseFigure)
{
case kGiMoveTo:
CGContextMoveToPoint(m_draw->getContext(), pxs[i].x, pxs[i].y);
break;
case kGiLineTo:
CGContextAddLineToPoint(m_draw->getContext(), pxs[i].x, pxs[i].y);
break;
case kGiBeziersTo:
if (i + 2 >= count)
return false;
CGContextAddCurveToPoint(m_draw->getContext(),
pxs[i+0].x, pxs[i+0].y,
pxs[i+1].x, pxs[i+1].y,
pxs[i+2].x, pxs[i+2].y);
i += 2;
break;
default:
return false;
}
if (types[i] & kGiCloseFigure)
CGContextClosePath(m_draw->getContext());
}
bool usepen = m_draw->setPen(ctx);
bool usebrush = m_draw->setBrush(ctx);
bool ret = count > 1 && (usepen || usebrush);
if (ret) {
CGContextDrawPath(m_draw->getContext(), usepen && usebrush ? kCGPathFillStroke
: usepen ? kCGPathStroke : kCGPathFill);
}
return ret;
}
bool GiCanvasIos::rawBeziers(const GiContext* ctx, const Point2d* pxs, int count)
{
bool ret = m_draw->setPen(ctx) && count > 1;
if (ret)
{
CGContextMoveToPoint(m_draw->getContext(), pxs[0].x, pxs[0].y);
for (int i = 1; i + 2 < count; i += 3)
{
CGContextAddCurveToPoint(m_draw->getContext(),
pxs[i+0].x, pxs[i+0].y,
pxs[i+1].x, pxs[i+1].y,
pxs[i+2].x, pxs[i+2].y);
}
CGContextStrokePath(m_draw->getContext());
}
return ret;
}
bool GiCanvasIos::rawBezierTo(float c1x, float c1y, float c2x, float c2y, float x, float y)
{
CGContextAddCurveToPoint(m_draw->getContext(), c1x, c1y, c2x, c2y, x, y);
return true;
}