| // Copyright 2016 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "xfa/fgas/graphics/cfgas_gepath.h" |
| |
| #include "core/fxge/cfx_path.h" |
| |
| CFGAS_GEPath::CFGAS_GEPath() = default; |
| |
| CFGAS_GEPath::~CFGAS_GEPath() = default; |
| |
| void CFGAS_GEPath::Clear() { |
| path_.Clear(); |
| } |
| |
| void CFGAS_GEPath::Close() { |
| path_.ClosePath(); |
| } |
| |
| void CFGAS_GEPath::MoveTo(const CFX_PointF& point) { |
| path_.AppendPoint(point, CFX_Path::Point::Type::kMove); |
| } |
| |
| void CFGAS_GEPath::LineTo(const CFX_PointF& point) { |
| path_.AppendPoint(point, CFX_Path::Point::Type::kLine); |
| } |
| |
| void CFGAS_GEPath::BezierTo(const CFX_PointF& c1, |
| const CFX_PointF& c2, |
| const CFX_PointF& to) { |
| path_.AppendPoint(c1, CFX_Path::Point::Type::kBezier); |
| path_.AppendPoint(c2, CFX_Path::Point::Type::kBezier); |
| path_.AppendPoint(to, CFX_Path::Point::Type::kBezier); |
| } |
| |
| void CFGAS_GEPath::ArcTo(const CFX_PointF& pos, |
| const CFX_SizeF& size, |
| float start_angle, |
| float sweep_angle) { |
| CFX_SizeF new_size = size / 2.0f; |
| ArcToInternal(CFX_PointF(pos.x + new_size.width, pos.y + new_size.height), |
| new_size, start_angle, sweep_angle); |
| } |
| |
| void CFGAS_GEPath::ArcToInternal(const CFX_PointF& pos, |
| const CFX_SizeF& size, |
| float start_angle, |
| float sweep_angle) { |
| float x0 = cos(sweep_angle / 2); |
| float y0 = sin(sweep_angle / 2); |
| float tx = ((1.0f - x0) * 4) / (3 * 1.0f); |
| float ty = y0 - ((tx * x0) / y0); |
| |
| CFX_PointF points[] = {CFX_PointF(x0 + tx, -ty), CFX_PointF(x0 + tx, ty)}; |
| float sn = sin(start_angle + sweep_angle / 2); |
| float cs = cos(start_angle + sweep_angle / 2); |
| |
| CFX_PointF bezier; |
| bezier.x = pos.x + (size.width * ((points[0].x * cs) - (points[0].y * sn))); |
| bezier.y = pos.y + (size.height * ((points[0].x * sn) + (points[0].y * cs))); |
| path_.AppendPoint(bezier, CFX_Path::Point::Type::kBezier); |
| |
| bezier.x = pos.x + (size.width * ((points[1].x * cs) - (points[1].y * sn))); |
| bezier.y = pos.y + (size.height * ((points[1].x * sn) + (points[1].y * cs))); |
| path_.AppendPoint(bezier, CFX_Path::Point::Type::kBezier); |
| |
| bezier.x = pos.x + (size.width * cos(start_angle + sweep_angle)); |
| bezier.y = pos.y + (size.height * sin(start_angle + sweep_angle)); |
| path_.AppendPoint(bezier, CFX_Path::Point::Type::kBezier); |
| } |
| |
| void CFGAS_GEPath::AddLine(const CFX_PointF& p1, const CFX_PointF& p2) { |
| path_.AppendPoint(p1, CFX_Path::Point::Type::kMove); |
| path_.AppendPoint(p2, CFX_Path::Point::Type::kLine); |
| } |
| |
| void CFGAS_GEPath::AddRectangle(float left, |
| float top, |
| float width, |
| float height) { |
| path_.AppendRect(left, top, left + width, top + height); |
| } |
| |
| void CFGAS_GEPath::AddEllipse(const CFX_RectF& rect) { |
| AddArc(rect.TopLeft(), rect.Size(), 0, FXSYS_PI * 2); |
| } |
| |
| void CFGAS_GEPath::AddArc(const CFX_PointF& original_pos, |
| const CFX_SizeF& original_size, |
| float start_angle, |
| float sweep_angle) { |
| if (sweep_angle == 0) |
| return; |
| |
| const float bezier_arc_angle_epsilon = 0.01f; |
| while (start_angle > FXSYS_PI * 2) |
| start_angle -= FXSYS_PI * 2; |
| while (start_angle < 0) |
| start_angle += FXSYS_PI * 2; |
| if (sweep_angle >= FXSYS_PI * 2) |
| sweep_angle = FXSYS_PI * 2; |
| if (sweep_angle <= -FXSYS_PI * 2) |
| sweep_angle = -FXSYS_PI * 2; |
| |
| CFX_SizeF size = original_size / 2; |
| CFX_PointF pos(original_pos.x + size.width, original_pos.y + size.height); |
| path_.AppendPoint(pos + CFX_PointF(size.width * cos(start_angle), |
| size.height * sin(start_angle)), |
| CFX_Path::Point::Type::kMove); |
| |
| float total_sweep = 0; |
| float local_sweep = 0; |
| float prev_sweep = 0; |
| bool done = false; |
| do { |
| if (sweep_angle < 0) { |
| prev_sweep = total_sweep; |
| local_sweep = -FXSYS_PI / 2; |
| total_sweep -= FXSYS_PI / 2; |
| if (total_sweep <= sweep_angle + bezier_arc_angle_epsilon) { |
| local_sweep = sweep_angle - prev_sweep; |
| done = true; |
| } |
| } else { |
| prev_sweep = total_sweep; |
| local_sweep = FXSYS_PI / 2; |
| total_sweep += FXSYS_PI / 2; |
| if (total_sweep >= sweep_angle - bezier_arc_angle_epsilon) { |
| local_sweep = sweep_angle - prev_sweep; |
| done = true; |
| } |
| } |
| |
| ArcToInternal(pos, size, start_angle, local_sweep); |
| start_angle += local_sweep; |
| } while (!done); |
| } |
| |
| void CFGAS_GEPath::AddSubpath(const CFGAS_GEPath& path) { |
| path_.Append(path.path_, nullptr); |
| } |
| |
| void CFGAS_GEPath::TransformBy(const CFX_Matrix& mt) { |
| path_.Transform(mt); |
| } |