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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_stroke.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_stroke.cpp')
-rw-r--r--third_party/agg23/agg_vcgen_stroke.cpp214
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diff --git a/third_party/agg23/agg_vcgen_stroke.cpp b/third_party/agg23/agg_vcgen_stroke.cpp
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+++ b/third_party/agg23/agg_vcgen_stroke.cpp
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+
+//----------------------------------------------------------------------------
+// XYQ: 2006-01-22 Copied from AGG project.
+// TODO: This file uses intensive floating point operations, so it's NOT suitable
+// for platforms like Symbian OS. We need to change to FIX format.
+//----------------------------------------------------------------------------
+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+//
+// Stroke generator
+//
+//----------------------------------------------------------------------------
+#include "../../core/include/fxcrt/fx_basic.h"
+#include "agg_vcgen_stroke.h"
+namespace agg
+{
+
+vcgen_stroke::vcgen_stroke() :
+ m_src_vertices(),
+ m_out_vertices(),
+ m_width(0.5f),
+ m_miter_limit(4 * 1.0f),
+ m_inner_miter_limit(1.0f + 1.0f / 100),
+ m_approx_scale(1.0f),
+ m_line_cap(butt_cap),
+ m_line_join(miter_join),
+ m_inner_join(inner_miter),
+ m_closed(0),
+ m_status(initial),
+ m_src_vertex(0),
+ m_out_vertex(0)
+{
+}
+void vcgen_stroke::remove_all()
+{
+ m_src_vertices.remove_all();
+ m_closed = 0;
+ m_status = initial;
+}
+void vcgen_stroke::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_cmd(x, y, cmd));
+ } else {
+ if(is_vertex(cmd)) {
+ m_src_vertices.add(vertex_dist_cmd(x, y, cmd));
+ } else {
+ m_closed = get_close_flag(cmd);
+ }
+ }
+}
+static inline void calc_butt_cap(FX_FLOAT* cap,
+ const vertex_dist& v0,
+ const vertex_dist& v1,
+ FX_FLOAT len,
+ FX_FLOAT width)
+{
+ FX_FLOAT dx = FXSYS_MulDiv(v1.y - v0.y, width, len);
+ FX_FLOAT dy = FXSYS_MulDiv(v1.x - v0.x, width, len);
+ cap[0] = v0.x - dx;
+ cap[1] = v0.y + dy;
+ cap[2] = v0.x + dx;
+ cap[3] = v0.y - dy;
+}
+void vcgen_stroke::rewind(unsigned)
+{
+ if(m_status == initial) {
+ m_src_vertices.close(m_closed != 0);
+ if(m_src_vertices.size() < 3) {
+ m_closed = 0;
+ }
+ }
+ m_status = ready;
+ m_src_vertex = 0;
+ m_out_vertex = 0;
+}
+unsigned vcgen_stroke::vertex(FX_FLOAT* x, FX_FLOAT* y)
+{
+ unsigned cmd = path_cmd_line_to;
+ line_join_e curj;
+ while(!is_stop(cmd)) {
+ switch(m_status) {
+ case initial:
+ rewind(0);
+ case ready:
+ if(m_src_vertices.size() < 2 + unsigned(m_closed != 0)) {
+ cmd = path_cmd_stop;
+ break;
+ }
+ m_status = m_closed ? outline1 : cap1;
+ cmd = path_cmd_move_to;
+ m_src_vertex = 0;
+ m_out_vertex = 0;
+ break;
+ case cap1:
+ stroke_calc_cap(m_out_vertices,
+ m_src_vertices[0],
+ m_src_vertices[1],
+ m_src_vertices[0].dist,
+ m_line_cap,
+ m_width,
+ m_approx_scale);
+ m_src_vertex = 1;
+ m_prev_status = outline1;
+ m_status = out_vertices;
+ m_out_vertex = 0;
+ break;
+ case cap2:
+ stroke_calc_cap(m_out_vertices,
+ m_src_vertices[m_src_vertices.size() - 1],
+ m_src_vertices[m_src_vertices.size() - 2],
+ m_src_vertices[m_src_vertices.size() - 2].dist,
+ m_line_cap,
+ m_width,
+ m_approx_scale);
+ m_prev_status = outline2;
+ m_status = out_vertices;
+ m_out_vertex = 0;
+ break;
+ case outline1:
+ if(m_closed) {
+ if(m_src_vertex >= m_src_vertices.size()) {
+ m_prev_status = close_first;
+ m_status = end_poly1;
+ break;
+ }
+ } else {
+ if(m_src_vertex >= m_src_vertices.size() - 1) {
+ m_status = cap2;
+ break;
+ }
+ }
+ curj = m_src_vertices[m_src_vertex].cmd & path_flags_jr ? miter_join_round : m_line_join;
+ stroke_calc_join(m_out_vertices,
+ m_src_vertices.prev(m_src_vertex),
+ m_src_vertices.curr(m_src_vertex),
+ m_src_vertices.next(m_src_vertex),
+ m_src_vertices.prev(m_src_vertex).dist,
+ m_src_vertices.curr(m_src_vertex).dist,
+ m_width,
+ curj,
+ m_inner_join,
+ m_miter_limit,
+ m_inner_miter_limit,
+ m_approx_scale);
+ ++m_src_vertex;
+ m_prev_status = m_status;
+ m_status = out_vertices;
+ m_out_vertex = 0;
+ break;
+ case close_first:
+ m_status = outline2;
+ cmd = path_cmd_move_to;
+ case outline2:
+ if(m_src_vertex <= unsigned(m_closed == 0)) {
+ m_status = end_poly2;
+ m_prev_status = stop;
+ break;
+ }
+ --m_src_vertex;
+ curj = m_src_vertices[m_src_vertex].cmd & path_flags_jr ? miter_join_round : m_line_join;
+ stroke_calc_join(m_out_vertices,
+ m_src_vertices.next(m_src_vertex),
+ m_src_vertices.curr(m_src_vertex),
+ m_src_vertices.prev(m_src_vertex),
+ m_src_vertices.curr(m_src_vertex).dist,
+ m_src_vertices.prev(m_src_vertex).dist,
+ m_width,
+ curj,
+ m_inner_join,
+ m_miter_limit,
+ m_inner_miter_limit,
+ m_approx_scale);
+ m_prev_status = m_status;
+ m_status = out_vertices;
+ m_out_vertex = 0;
+ break;
+ case out_vertices:
+ if(m_out_vertex >= m_out_vertices.size()) {
+ m_status = m_prev_status;
+ } else {
+ const point_type& c = m_out_vertices[m_out_vertex++];
+ *x = c.x;
+ *y = c.y;
+ return cmd;
+ }
+ break;
+ case end_poly1:
+ m_status = m_prev_status;
+ return path_cmd_end_poly | path_flags_close | path_flags_ccw;
+ case end_poly2:
+ m_status = m_prev_status;
+ return path_cmd_end_poly | path_flags_close | path_flags_cw;
+ case stop:
+ cmd = path_cmd_stop;
+ break;
+ }
+ }
+ return cmd;
+}
+}