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Diffstat (limited to 'xfa/fxgraphics/fx_path_generator.cpp')
| -rw-r--r-- | xfa/fxgraphics/fx_path_generator.cpp | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/xfa/fxgraphics/fx_path_generator.cpp b/xfa/fxgraphics/fx_path_generator.cpp new file mode 100644 index 0000000000..cbe0f29239 --- /dev/null +++ b/xfa/fxgraphics/fx_path_generator.cpp @@ -0,0 +1,201 @@ +// Copyright 2014 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/fxgraphics/fx_path_generator.h" + +#include "xfa/fxgraphics/pre.h" + +CFX_PathGenerator::CFX_PathGenerator() { + m_pPathData = NULL; +} +void CFX_PathGenerator::Create() { + m_pPathData = new CFX_PathData; +} +CFX_PathGenerator::~CFX_PathGenerator() { + if (m_pPathData) { + delete m_pPathData; + m_pPathData = NULL; + } +} +void CFX_PathGenerator::AddPathData(CFX_PathData* pPathData) { + if (pPathData && pPathData->GetPointCount() > 0) { + int nCount = pPathData->GetPointCount(); + FX_PATHPOINT* pPoints = pPathData->GetPoints(); + AddPathData(pPoints, nCount); + } +} +void CFX_PathGenerator::AddPathData(FX_PATHPOINT* pPoints, int nCount) { + if (pPoints && nCount > 0) { + int nOldCount = m_pPathData->GetPointCount(); + m_pPathData->AddPointCount(nCount); + FX_PATHPOINT* pDstPoints = m_pPathData->GetPoints(); + FXSYS_memcpy(pDstPoints + nOldCount, pPoints, + sizeof(FX_PATHPOINT) * nCount); + } +} +void CFX_PathGenerator::MoveTo(FX_FLOAT x, FX_FLOAT y) { + m_pPathData->AddPointCount(1); + m_pPathData->SetPoint(m_pPathData->GetPointCount() - 1, x, y, FXPT_MOVETO); +} +void CFX_PathGenerator::LineTo(FX_FLOAT x, FX_FLOAT y) { + m_pPathData->AddPointCount(1); + m_pPathData->SetPoint(m_pPathData->GetPointCount() - 1, x, y, FXPT_LINETO); +} +void CFX_PathGenerator::BezierTo(FX_FLOAT ctrl_x1, + FX_FLOAT ctrl_y1, + FX_FLOAT ctrl_x2, + FX_FLOAT ctrl_y2, + FX_FLOAT to_x, + FX_FLOAT to_y) { + int old_count = m_pPathData->GetPointCount(); + m_pPathData->AddPointCount(3); + m_pPathData->SetPoint(old_count, ctrl_x1, ctrl_y1, FXPT_BEZIERTO); + m_pPathData->SetPoint(old_count + 1, ctrl_x2, ctrl_y2, FXPT_BEZIERTO); + m_pPathData->SetPoint(old_count + 2, to_x, to_y, FXPT_BEZIERTO); +} +void CFX_PathGenerator::Close() { + if (m_pPathData->GetPointCount() > 0) { + int index = m_pPathData->GetPointCount() - 1; + FX_PATHPOINT* pPoints = m_pPathData->GetPoints(); + pPoints[index].m_Flag |= FXPT_CLOSEFIGURE; + } +} +void CFX_PathGenerator::AddLine(FX_FLOAT x1, + FX_FLOAT y1, + FX_FLOAT x2, + FX_FLOAT y2) { + int old_count = m_pPathData->GetPointCount(); + m_pPathData->AddPointCount(2); + m_pPathData->SetPoint(old_count, x1, y1, FXPT_MOVETO); + m_pPathData->SetPoint(old_count + 1, x2, y2, FXPT_LINETO); +} +void CFX_PathGenerator::AddBezier(FX_FLOAT start_x, + FX_FLOAT start_y, + FX_FLOAT ctrl_x1, + FX_FLOAT ctrl_y1, + FX_FLOAT ctrl_x2, + FX_FLOAT ctrl_y2, + FX_FLOAT end_x, + FX_FLOAT end_y) { + int old_count = m_pPathData->GetPointCount(); + m_pPathData->AddPointCount(4); + m_pPathData->SetPoint(old_count, start_x, start_y, FXPT_MOVETO); + m_pPathData->SetPoint(old_count + 1, ctrl_x1, ctrl_y1, FXPT_BEZIERTO); + m_pPathData->SetPoint(old_count + 2, ctrl_x2, ctrl_y2, FXPT_BEZIERTO); + m_pPathData->SetPoint(old_count + 3, end_x, end_y, FXPT_BEZIERTO); +} +void CFX_PathGenerator::AddRectangle(FX_FLOAT x1, + FX_FLOAT y1, + FX_FLOAT x2, + FX_FLOAT y2) { + m_pPathData->AppendRect(x1, y1, x2, y2); +} +void CFX_PathGenerator::AddEllipse(FX_FLOAT x, + FX_FLOAT y, + FX_FLOAT width, + FX_FLOAT height) { + AddArc(x, y, width, height, 0, FX_PI * 2); +} +void CFX_PathGenerator::ArcTo(FX_FLOAT x, + FX_FLOAT y, + FX_FLOAT width, + FX_FLOAT height, + FX_FLOAT start_angle, + FX_FLOAT sweep_angle) { + FX_FLOAT x0 = FXSYS_cos(sweep_angle / 2); + FX_FLOAT y0 = FXSYS_sin(sweep_angle / 2); + FX_FLOAT tx = ((1.0f - x0) * 4) / (3 * 1.0f); + FX_FLOAT ty = y0 - ((tx * x0) / y0); + FX_FLOAT px[3], py[3]; + px[0] = x0 + tx; + py[0] = -ty; + px[1] = x0 + tx; + py[1] = ty; + FX_FLOAT sn = FXSYS_sin(start_angle + sweep_angle / 2); + FX_FLOAT cs = FXSYS_cos(start_angle + sweep_angle / 2); + int old_count = m_pPathData->GetPointCount(); + m_pPathData->AddPointCount(3); + FX_FLOAT bezier_x, bezier_y; + bezier_x = x + (width * ((px[0] * cs) - (py[0] * sn))); + bezier_y = y + (height * ((px[0] * sn) + (py[0] * cs))); + m_pPathData->SetPoint(old_count, bezier_x, bezier_y, FXPT_BEZIERTO); + bezier_x = x + (width * ((px[1] * cs) - (py[1] * sn))); + bezier_y = y + (height * ((px[1] * sn) + (py[1] * cs))); + m_pPathData->SetPoint(old_count + 1, bezier_x, bezier_y, FXPT_BEZIERTO); + bezier_x = x + (width * FXSYS_cos(start_angle + sweep_angle)); + bezier_y = y + (height * FXSYS_sin(start_angle + sweep_angle)); + m_pPathData->SetPoint(old_count + 2, bezier_x, bezier_y, FXPT_BEZIERTO); +} +void CFX_PathGenerator::AddArc(FX_FLOAT x, + FX_FLOAT y, + FX_FLOAT width, + FX_FLOAT height, + FX_FLOAT start_angle, + FX_FLOAT sweep_angle) { + if (sweep_angle == 0) { + return; + } + + const FX_FLOAT bezier_arc_angle_epsilon = 0.01f; + while (start_angle > FX_PI * 2) { + start_angle -= FX_PI * 2; + } + while (start_angle < 0) { + start_angle += FX_PI * 2; + } + if (sweep_angle >= FX_PI * 2) { + sweep_angle = FX_PI * 2; + } + if (sweep_angle <= -FX_PI * 2) { + sweep_angle = -FX_PI * 2; + } + m_pPathData->AddPointCount(1); + m_pPathData->SetPoint(m_pPathData->GetPointCount() - 1, + x + (width * FXSYS_cos(start_angle)), + y + (height * FXSYS_sin(start_angle)), FXPT_MOVETO); + FX_FLOAT total_sweep = 0, local_sweep = 0, prev_sweep = 0; + FX_BOOL done = FALSE; + do { + if (sweep_angle < 0) { + prev_sweep = total_sweep; + local_sweep = -FX_PI / 2; + total_sweep -= FX_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 = FX_PI / 2; + total_sweep += FX_PI / 2; + if (total_sweep >= sweep_angle - bezier_arc_angle_epsilon) { + local_sweep = sweep_angle - prev_sweep; + done = TRUE; + } + } + ArcTo(x, y, width, height, start_angle, local_sweep); + start_angle += local_sweep; + } while (!done); +} +void CFX_PathGenerator::AddPie(FX_FLOAT x, + FX_FLOAT y, + FX_FLOAT width, + FX_FLOAT height, + FX_FLOAT start_angle, + FX_FLOAT sweep_angle) { + if (sweep_angle == 0) { + int old_count = m_pPathData->GetPointCount(); + m_pPathData->AddPointCount(2); + m_pPathData->SetPoint(old_count, x, y, FXPT_MOVETO); + m_pPathData->SetPoint(old_count + 1, x + (width * FXSYS_cos(start_angle)), + y + (height * FXSYS_sin(start_angle)), FXPT_LINETO); + return; + } + AddArc(x, y, width, height, start_angle, sweep_angle); + m_pPathData->AddPointCount(1); + m_pPathData->SetPoint(m_pPathData->GetPointCount() - 1, x, y, + FXPT_LINETO | FXPT_CLOSEFIGURE); +} |