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esvg/parserSVG/Path.cpp

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/**
*******************************************************************************
* @file parserSVG/Path.cpp
* @brief basic path parsing (Sources)
* @author Edouard DUPIN
* @date 20/03/2012
* @par Project
* parserSVG
*
* @par Copyright
* Copyright 2011 Edouard DUPIN, all right reserved
*
* This software is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY.
*
* Licence summary :
* You can modify and redistribute the sources code and binaries.
* You can send me the bug-fix
*
* Term of the licence in in the file licence.txt.
*
*******************************************************************************
*/
#include <parserSVG/Debug.h>
#include <parserSVG/Path.h>
#include <agg/agg_conv_stroke.h>
#include <agg/agg_conv_dash.h>
#include <agg/agg_conv_curve.h>
#include <agg/agg_conv_contour.h>
#include <agg/agg_conv_smooth_poly1.h>
svg::Path::Path(PaintState parentPaintState) : svg::Base(parentPaintState)
{
}
svg::Path::~Path(void)
{
}
// return the next char position ... (after 'X' or NULL)
const char * extractCmd(const char * input, char& cmd, etk::Vector<float>& outputList)
{
if (*input == '\0') {
return NULL;
}
outputList.Clear();
cmd = '\0';
const char * outputPointer = NULL;
if (!( (input[0] <= 'Z' && input[0] >= 'A') || (input[0] <= 'z' && input[0] >= 'a') ) ) {
SVG_ERROR("Error in the SVG Path : \"" << input << "\"");
return NULL;
}
cmd = input[0];
SVG_VERBOSE("Find command : " << cmd);
if (input[1] == '\0') {
return &input[1];
}
int32_t iii=1;
// extract every float separated by a ' ' or a ','
float element;
char spacer[10];
int32_t nbElementRead;
while( sscanf(&input[iii], "%1[, ]%f%n", spacer, &element, &nbElementRead) == 2
|| sscanf(&input[iii], "%f%n", &element, &nbElementRead) == 1) {
SVG_VERBOSE("Find element : " << element);
outputList.PushBack(element);
iii += nbElementRead;
}
outputPointer = &input[iii];
while(*outputPointer!= '\0' && *outputPointer == ' ') {
outputPointer++;
}
//outputPointer++;
return outputPointer;
}
bool svg::Path::Parse(TiXmlNode * node, agg::trans_affine& parentTrans, etk::Vector2D<float>& sizeMax)
{
ParseTransform(node);
ParsePaintAttr(node);
// add the property of the parrent modifications ...
m_transformMatrix *= parentTrans;
const char *elementXML = node->ToElement()->Attribute("d");
if (NULL == elementXML) {
SVG_ERROR("(l "<<node->Row()<<") path: missing 'p' attribute");
return false;
}
SVG_VERBOSE("Parse Path : \"" << elementXML << "\"");
char command;
etk::Vector<float> listDot;
for( const char *sss=extractCmd(elementXML, command, listDot);
NULL != sss;
sss=extractCmd(sss, command, listDot) ) {
pathBasic_ts pathElement;
memset(&pathElement, 0, 1*sizeof(pathBasic_ts));
switch(command) {
case 'M': // Move To (absolute)
case 'L': // Line To (absolute)
case 'V': // Vertical Line To (absolute)
case 'H': // Horizantal Line To (absolute)
case 'Q': // Quadratic Bezier curve (absolute)
case 'T': // smooth quadratic Bezier curve to (absolute)
case 'C': // curve to (absolute)
case 'S': // smooth curve to (absolute)
case 'A': // elliptical Arc (absolute)
case 'Z': // closepath (absolute)
pathElement.relative = false;
break;
default : // else (relative)
pathElement.relative = true;
break;
}
switch(command) {
case 'M': // Move To (absolute)
case 'm': // Move To (relative)
// 2 Elements ...
if(listDot.Size()%2 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_MOVETO;
if (listDot.Size() >= 2) {
pathElement.element[0] = listDot[0];
pathElement.element[1] = listDot[1];
m_listElement.PushBack(pathElement);
}
pathElement.cmd = svg::PATH_ENUM_LINETO;
for(int32_t iii=2; iii<listDot.Size(); iii+=2) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
m_listElement.PushBack(pathElement);
}
break;
case 'L': // Line To (absolute)
case 'l': // Line To (relative)
// 2 Elements ...
if(listDot.Size()%2 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_LINETO;
for(int32_t iii=0; iii<listDot.Size(); iii+=2) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
m_listElement.PushBack(pathElement);
}
break;
case 'V': // Vertical Line To (absolute)
case 'v': // Vertical Line To (relative)
// 1 Element ...
if(listDot.Size() == 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_LINETO_V;
for(int32_t iii=0; iii<listDot.Size(); iii+=1) {
pathElement.element[0] = listDot[iii];
m_listElement.PushBack(pathElement);
}
break;
case 'H': // Horizantal Line To (absolute)
case 'h': // Horizantal Line To (relative)
// 1 Element ...
if(listDot.Size() == 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_LINETO_H;
for(int32_t iii=0; iii<listDot.Size(); iii+=1) {
pathElement.element[0] = listDot[iii];
m_listElement.PushBack(pathElement);
}
break;
case 'Q': // Quadratic Bezier curve (absolute)
case 'q': // Quadratic Bezier curve (relative)
// 4 Elements ...
if(listDot.Size()%4 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_BEZIER_CURVETO;
for(int32_t iii=0; iii<listDot.Size(); iii+=4) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
pathElement.element[2] = listDot[iii+2];
pathElement.element[3] = listDot[iii+3];
m_listElement.PushBack(pathElement);
}
break;
case 'T': // smooth quadratic Bezier curve to (absolute)
case 't': // smooth quadratic Bezier curve to (relative)
// 2 Elements ...
if(listDot.Size()%2 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_BEZIER_SMOTH_CURVETO;
for(int32_t iii=0; iii<listDot.Size(); iii+=2) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
m_listElement.PushBack(pathElement);
}
break;
case 'C': // curve to (absolute)
case 'c': // curve to (relative)
// 6 Elements ...
if(listDot.Size()%6 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_CURVETO;
for(int32_t iii=0; iii<listDot.Size(); iii+=6) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
pathElement.element[2] = listDot[iii+2];
pathElement.element[3] = listDot[iii+3];
pathElement.element[4] = listDot[iii+4];
pathElement.element[5] = listDot[iii+5];
m_listElement.PushBack(pathElement);
}
break;
case 'S': // smooth curve to (absolute)
case 's': // smooth curve to (relative)
// 4 Elements ...
if(listDot.Size()%4 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_SMOTH_CURVETO;
for(int32_t iii=0; iii<listDot.Size(); iii+=4) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
pathElement.element[2] = listDot[iii+2];
pathElement.element[3] = listDot[iii+3];
m_listElement.PushBack(pathElement);
}
break;
case 'A': // elliptical Arc (absolute)
case 'a': // elliptical Arc (relative)
// 7 Elements ...
if(listDot.Size()%7 != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_ELLIPTIC;
for(int32_t iii=0; iii<listDot.Size(); iii+=7) {
pathElement.element[0] = listDot[iii];
pathElement.element[1] = listDot[iii+1];
pathElement.element[2] = listDot[iii+2];
pathElement.element[3] = listDot[iii+3];
pathElement.element[4] = listDot[iii+4];
pathElement.element[5] = listDot[iii+5];
pathElement.element[6] = listDot[iii+6];
m_listElement.PushBack(pathElement);
}
break;
case 'Z': // closepath (absolute)
case 'z': // closepath (relative)
// 0 Element ...
if(listDot.Size() != 0) {
SVG_WARNING("the PATH command "<< command << " has not the good number of element = " << listDot.Size() );
break;
}
pathElement.cmd = svg::PATH_ENUM_STOP;
m_listElement.PushBack(pathElement);
break;
default:
SVG_ERROR ("Unknow error : \"" << command << "\"");
}
}
return true;
}
void svg::Path::Display(int32_t spacing)
{
SVG_DEBUG(SpacingDist(spacing) << "Path");
for(int32_t iii=0; iii<m_listElement.Size(); iii++) {
switch (m_listElement[iii].cmd) {
case PATH_ENUM_STOP:
SVG_DEBUG(SpacingDist(spacing+4) << "STOP");
break;
case PATH_ENUM_MOVETO:
SVG_DEBUG(SpacingDist(spacing+4) << "MOVETO (" << m_listElement[iii].element[0] << "," << m_listElement[iii].element[1] << ")" );
break;
case PATH_ENUM_LINETO:
SVG_DEBUG(SpacingDist(spacing+4) << "LINETO (" << m_listElement[iii].element[0] << "," << m_listElement[iii].element[1] << ")" );
break;
case PATH_ENUM_LINETO_H:
SVG_DEBUG(SpacingDist(spacing+4) << "LINETO_H (" << m_listElement[iii].element[0] << ")" );
break;
case PATH_ENUM_LINETO_V:
SVG_DEBUG(SpacingDist(spacing+4) << "LINETO_V (" << m_listElement[iii].element[0] << ")" );
break;
case PATH_ENUM_CURVETO:
SVG_DEBUG(SpacingDist(spacing+4) << "CURVETO (" << m_listElement[iii].element[0] <<
"," << m_listElement[iii].element[1] <<
"," << m_listElement[iii].element[2] <<
"," << m_listElement[iii].element[3] <<
"," << m_listElement[iii].element[4] <<
"," << m_listElement[iii].element[5] << ")" );
break;
case PATH_ENUM_SMOTH_CURVETO:
SVG_DEBUG(SpacingDist(spacing+4) << "SMOTH_CURVETO (" << m_listElement[iii].element[0] <<
"," << m_listElement[iii].element[1] <<
"," << m_listElement[iii].element[2] <<
"," << m_listElement[iii].element[3] << ")" );
break;
case PATH_ENUM_BEZIER_CURVETO:
SVG_DEBUG(SpacingDist(spacing+4) << "BEZIER_CURVETO (" << m_listElement[iii].element[0] <<
"," << m_listElement[iii].element[1] <<
"," << m_listElement[iii].element[2] <<
"," << m_listElement[iii].element[3] << ")" );
break;
case PATH_ENUM_BEZIER_SMOTH_CURVETO:
SVG_DEBUG(SpacingDist(spacing+4) << "BEZIER_SMOTH_CURVETO (" << m_listElement[iii].element[0] << "," << m_listElement[iii].element[1] << ")" );
break;
case PATH_ENUM_ELLIPTIC:
SVG_DEBUG(SpacingDist(spacing+4) << "ELLIPTIC (TODO...)" );
// show explanation at : http://www.w3.org/TR/SVG/paths.html#PathDataEllipticalArcCommands
break;
default:
SVG_DEBUG(SpacingDist(spacing+4) << "????" );
break;
}
}
}
void svg::Path::AggDraw(svg::Renderer& myRenderer, agg::trans_affine& basicTrans)
{
myRenderer.m_renderArea->color(agg::rgba8(m_paint.fill.r, m_paint.fill.g, m_paint.fill.b, m_paint.fill.a));
agg::path_storage path;
path.start_new_path();
for(int32_t iii=0; iii<m_listElement.Size(); iii++) {
switch (m_listElement[iii].cmd) {
case PATH_ENUM_STOP:
AbstractCloseSubpath(path);
break;
case PATH_ENUM_MOVETO:
AbstractMoveTo(path, m_listElement[iii].relative,
m_listElement[iii].element[0],
m_listElement[iii].element[1] );
break;
case PATH_ENUM_LINETO:
AbstractLineTo(path, m_listElement[iii].relative,
m_listElement[iii].element[0],
m_listElement[iii].element[1] );
break;
case PATH_ENUM_LINETO_H:
AbstractHLineTo(path, m_listElement[iii].relative,
m_listElement[iii].element[0] );
break;
case PATH_ENUM_LINETO_V:
AbstractVLineTo(path, m_listElement[iii].relative,
m_listElement[iii].element[0] );
break;
case PATH_ENUM_CURVETO:
AbstractCurve4(path, m_listElement[iii].relative,
m_listElement[iii].element[0],
m_listElement[iii].element[1],
m_listElement[iii].element[2],
m_listElement[iii].element[3],
m_listElement[iii].element[4],
m_listElement[iii].element[5] );
//SVG_INFO(" draw : PATH_ENUM_CURVETO");
break;
case PATH_ENUM_SMOTH_CURVETO:
AbstractCurve4(path, m_listElement[iii].relative,
m_listElement[iii].element[0],
m_listElement[iii].element[1],
m_listElement[iii].element[2],
m_listElement[iii].element[3] );
//SVG_INFO(" draw : PATH_ENUM_SMOTH_CURVETO");
break;
case PATH_ENUM_BEZIER_CURVETO:
AbstractCurve3(path, m_listElement[iii].relative,
m_listElement[iii].element[0],
m_listElement[iii].element[1],
m_listElement[iii].element[2],
m_listElement[iii].element[3] );
//SVG_INFO(" draw : PATH_ENUM_BEZIER_CURVETO");
break;
case PATH_ENUM_BEZIER_SMOTH_CURVETO:
AbstractCurve3(path, m_listElement[iii].relative,
m_listElement[iii].element[0],
m_listElement[iii].element[1] );
//SVG_INFO(" draw : PATH_ENUM_BEZIER_SMOTH_CURVETO");
break;
case PATH_ENUM_ELLIPTIC:
SVG_TODO("Elliptic arc is not implemented NOW ...");
break;
default:
SVG_ERROR("Unknow PATH commant (internal error)");
break;
}
}
agg::trans_affine mtx = m_transformMatrix;
mtx *= basicTrans;
agg::conv_curve<agg::path_storage> curve(path);
if (m_paint.fill.a != 0x00) {
agg::conv_transform<agg::conv_curve<agg::path_storage>, agg::trans_affine> trans(curve, mtx);
// set the filling mode :
myRenderer.m_rasterizer.filling_rule((m_paint.flagEvenOdd)?agg::fill_even_odd:agg::fill_non_zero);
myRenderer.m_rasterizer.add_path(trans);
agg::render_scanlines(myRenderer.m_rasterizer, myRenderer.m_scanLine, *myRenderer.m_renderArea);
}
if (m_paint.strokeWidth > 0 && m_paint.stroke.a!=0x00 ) {
myRenderer.m_renderArea->color(agg::rgba8(m_paint.stroke.r, m_paint.stroke.g, m_paint.stroke.b, m_paint.stroke.a));
// Drawing as an outline
agg::conv_stroke<agg::conv_curve<agg::path_storage> > myPolygonStroke(curve);
myPolygonStroke.width(m_paint.strokeWidth);
agg::conv_transform<agg::conv_stroke<agg::conv_curve<agg::path_storage> >, agg::trans_affine> transStroke(myPolygonStroke, mtx);
// set the filling mode :
myRenderer.m_rasterizer.filling_rule(agg::fill_non_zero);
myRenderer.m_rasterizer.add_path(transStroke);
agg::render_scanlines(myRenderer.m_rasterizer, myRenderer.m_scanLine, *myRenderer.m_renderArea);
}
}
void svg::Path::AbstractMoveTo(agg::path_storage& path, bool rel, double x, double y)
{
if(true == rel) {
path.rel_to_abs(&x, &y);
}
path.move_to(x, y);
}
void svg::Path::AbstractLineTo(agg::path_storage& path, bool rel, double x, double y)
{
if(true == rel) {
path.rel_to_abs(&x, &y);
}
path.line_to(x, y);
}
void svg::Path::AbstractHLineTo(agg::path_storage& path, bool rel, double x)
{
double x2 = 0.0;
double y2 = 0.0;
if(0!=path.total_vertices()) {
path.vertex(path.total_vertices() - 1, &x2, &y2);
if(true == rel) {
x += x2;
}
path.line_to(x, y2);
}
}
void svg::Path::AbstractVLineTo(agg::path_storage& path, bool rel, double y)
{
double x2 = 0.0;
double y2 = 0.0;
if(path.total_vertices()) {
path.vertex(path.total_vertices() - 1, &x2, &y2);
if(true == rel) {
y += y2;
}
path.line_to(x2, y);
}
}
void svg::Path::AbstractCurve3(agg::path_storage& path, bool rel, double x1, double y1, double x, double y)
{
if(true == rel) {
path.rel_to_abs(&x1, &y1);
path.rel_to_abs(&x, &y);
}
path.curve3(x1, y1, x, y);
}
void svg::Path::AbstractCurve3(agg::path_storage& path, bool rel, double x, double y)
{
if(true == rel) {
path.curve3_rel(x, y);
} else {
path.curve3(x, y);
}
}
void svg::Path::AbstractCurve4(agg::path_storage& path, bool rel, double x1, double y1, double x2, double y2, double x, double y)
{
if(true == rel) {
path.rel_to_abs(&x1, &y1);
path.rel_to_abs(&x2, &y2);
path.rel_to_abs(&x, &y);
}
path.curve4(x1, y1, x2, y2, x, y);
}
void svg::Path::AbstractCurve4(agg::path_storage& path, bool rel, double x2, double y2, double x, double y)
{
if(true == rel) {
path.curve4_rel(x2, y2, x, y);
} else {
path.curve4(x2, y2, x, y);
}
}
void svg::Path::AbstractCloseSubpath(agg::path_storage& path)
{
path.end_poly(agg::path_flags_close);
}
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