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authorTom Sepez <tsepez@chromium.org>2015-06-17 10:01:00 -0700
committerTom Sepez <tsepez@chromium.org>2015-06-17 10:01:00 -0700
commitb7d358b498800e4c240d381fa6f098af17a4d95b (patch)
treeaa0d8677af748caf9881ecd011af2b00af925188 /third_party/agg23/agg_vcgen_dash.cpp
parent9555022ee550ee97415a86957686cc28716c4dee (diff)
downloadpdfium-b7d358b498800e4c240d381fa6f098af17a4d95b.tar.xz
Merge to XFA: Separate agg-authored code from fx-authored code.
Original Review URL: https://codereview.chromium.org/1152743007. BUG=pdfium:166 R=brucedawson@chromium.org, thestig@chromium.org TBR=brucedawson@chromium.org, thestig@chromium.org Review URL: https://codereview.chromium.org/1186423003.
Diffstat (limited to 'third_party/agg23/agg_vcgen_dash.cpp')
-rw-r--r--third_party/agg23/agg_vcgen_dash.cpp176
1 files changed, 176 insertions, 0 deletions
diff --git a/third_party/agg23/agg_vcgen_dash.cpp b/third_party/agg23/agg_vcgen_dash.cpp
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+++ b/third_party/agg23/agg_vcgen_dash.cpp
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+
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+// mcseemagg@yahoo.com
+// http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Line dash generator
+//
+//----------------------------------------------------------------------------
+#include "../../core/include/fxcrt/fx_basic.h"
+#include "agg_vcgen_dash.h"
+#include "agg_shorten_path.h"
+namespace agg
+{
+vcgen_dash::vcgen_dash() :
+ m_total_dash_len(0),
+ m_num_dashes(0),
+ m_dash_start(0),
+ m_shorten(0),
+ m_curr_dash_start(0),
+ m_curr_dash(0),
+ m_src_vertices(),
+ m_closed(0),
+ m_status(initial),
+ m_src_vertex(0)
+{
+}
+void vcgen_dash::remove_all_dashes()
+{
+ m_total_dash_len = 0;
+ m_num_dashes = 0;
+ m_curr_dash_start = 0;
+ m_curr_dash = 0;
+}
+void vcgen_dash::add_dash(FX_FLOAT dash_len, FX_FLOAT gap_len)
+{
+ if(m_num_dashes < max_dashes) {
+ m_total_dash_len += dash_len + gap_len;
+ m_dashes[m_num_dashes++] = dash_len;
+ m_dashes[m_num_dashes++] = gap_len;
+ }
+}
+void vcgen_dash::dash_start(FX_FLOAT ds)
+{
+ m_dash_start = ds;
+ calc_dash_start(FXSYS_fabs(ds));
+}
+void vcgen_dash::calc_dash_start(FX_FLOAT ds)
+{
+ m_curr_dash = 0;
+ m_curr_dash_start = 0;
+ while(ds > 0) {
+ if(ds > m_dashes[m_curr_dash]) {
+ ds -= m_dashes[m_curr_dash];
+ ++m_curr_dash;
+ m_curr_dash_start = 0;
+ if(m_curr_dash >= m_num_dashes) {
+ m_curr_dash = 0;
+ }
+ } else {
+ m_curr_dash_start = ds;
+ ds = 0;
+ }
+ }
+}
+void vcgen_dash::remove_all()
+{
+ m_status = initial;
+ m_src_vertices.remove_all();
+ m_closed = 0;
+}
+void vcgen_dash::add_vertex(FX_FLOAT x, FX_FLOAT y, unsigned cmd)
+{
+ m_status = initial;
+ if(is_move_to(cmd)) {
+ m_src_vertices.modify_last(vertex_dist(x, y));
+ } else {
+ if(is_vertex(cmd)) {
+ m_src_vertices.add(vertex_dist(x, y));
+ } else {
+ m_closed = get_close_flag(cmd);
+ }
+ }
+}
+void vcgen_dash::rewind(unsigned)
+{
+ if(m_status == initial) {
+ m_src_vertices.close(m_closed != 0);
+ shorten_path(m_src_vertices, m_shorten, m_closed);
+ }
+ m_status = ready;
+ m_src_vertex = 0;
+}
+unsigned vcgen_dash::vertex(FX_FLOAT* x, FX_FLOAT* y)
+{
+ unsigned cmd = path_cmd_move_to;
+ while(!is_stop(cmd)) {
+ switch(m_status) {
+ case initial:
+ rewind(0);
+ case ready:
+ if(m_num_dashes < 2 || m_src_vertices.size() < 2) {
+ cmd = path_cmd_stop;
+ break;
+ }
+ m_status = polyline;
+ m_src_vertex = 1;
+ m_v1 = &m_src_vertices[0];
+ m_v2 = &m_src_vertices[1];
+ m_curr_rest = m_v1->dist;
+ *x = m_v1->x;
+ *y = m_v1->y;
+ if(m_dash_start >= 0) {
+ calc_dash_start(m_dash_start);
+ }
+ return path_cmd_move_to;
+ case polyline: {
+ FX_FLOAT dash_rest = m_dashes[m_curr_dash] - m_curr_dash_start;
+ unsigned cmd = (m_curr_dash & 1) ?
+ path_cmd_move_to :
+ path_cmd_line_to;
+ if(m_curr_rest > dash_rest) {
+ m_curr_rest -= dash_rest;
+ ++m_curr_dash;
+ if(m_curr_dash >= m_num_dashes) {
+ m_curr_dash = 0;
+ }
+ m_curr_dash_start = 0;
+ *x = m_v2->x - (m_v2->x - m_v1->x) * m_curr_rest / m_v1->dist;
+ *y = m_v2->y - (m_v2->y - m_v1->y) * m_curr_rest / m_v1->dist;
+ } else {
+ m_curr_dash_start += m_curr_rest;
+ *x = m_v2->x;
+ *y = m_v2->y;
+ ++m_src_vertex;
+ m_v1 = m_v2;
+ m_curr_rest = m_v1->dist;
+ if(m_closed) {
+ if(m_src_vertex > m_src_vertices.size()) {
+ m_status = stop;
+ } else {
+ m_v2 = &m_src_vertices
+ [
+ (m_src_vertex >= m_src_vertices.size()) ? 0 :
+ m_src_vertex
+ ];
+ }
+ } else {
+ if(m_src_vertex >= m_src_vertices.size()) {
+ m_status = stop;
+ } else {
+ m_v2 = &m_src_vertices[m_src_vertex];
+ }
+ }
+ }
+ return cmd;
+ }
+ break;
+ case stop:
+ cmd = path_cmd_stop;
+ break;
+ }
+ }
+ return path_cmd_stop;
+}
+}