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path: root/xfa/src/fxgraphics/fx_path_generator.cpp
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Diffstat (limited to 'xfa/src/fxgraphics/fx_path_generator.cpp')
-rw-r--r--xfa/src/fxgraphics/fx_path_generator.cpp201
1 files changed, 201 insertions, 0 deletions
diff --git a/xfa/src/fxgraphics/fx_path_generator.cpp b/xfa/src/fxgraphics/fx_path_generator.cpp
new file mode 100644
index 0000000000..8b0bab00da
--- /dev/null
+++ b/xfa/src/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/src/fxgraphics/fx_path_generator.h"
+
+#include "xfa/src/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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 23:36:16 +0000