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5172
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/***************************************************************************/
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/* */
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/* ftoutln.c */
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/* */
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/* FreeType outline management (body). */
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/* */
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/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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/*************************************************************************/
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/* */
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/* All functions are declared in freetype.h. */
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/* */
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/*************************************************************************/
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#include <ft2build.h>
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#include FT_OUTLINE_H
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#include FT_INTERNAL_OBJECTS_H
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#include FT_INTERNAL_DEBUG_H
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#include FT_TRIGONOMETRY_H
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_outline
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42 |
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static
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const FT_Outline null_outline = { 0, 0, 0, 0, 0, 0 };
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/* documentation is in ftoutln.h */
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48 |
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FT_EXPORT_DEF( FT_Error )
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FT_Outline_Decompose( FT_Outline* outline,
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const FT_Outline_Funcs* func_interface,
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void* user )
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{
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#undef SCALED
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#define SCALED( x ) ( ( (x) << shift ) - delta )
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56 |
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FT_Vector v_last;
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FT_Vector v_control;
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FT_Vector v_start;
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FT_Vector* point;
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FT_Vector* limit;
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char* tags;
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64 |
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FT_Error error;
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66 |
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FT_Int n; /* index of contour in outline */
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FT_UInt first; /* index of first point in contour */
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FT_Int tag; /* current point's state */
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70 |
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FT_Int shift;
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FT_Pos delta;
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if ( !outline || !func_interface )
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return FT_Err_Invalid_Argument;
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shift = func_interface->shift;
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delta = func_interface->delta;
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first = 0;
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81 |
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for ( n = 0; n < outline->n_contours; n++ )
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{
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FT_Int last; /* index of last point in contour */
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85 |
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FT_TRACE5(( "FT_Outline_Decompose: Outline %d\n", n ));
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last = outline->contours[n];
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if ( last < 0 )
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goto Invalid_Outline;
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limit = outline->points + last;
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93 |
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v_start = outline->points[first];
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v_start.x = SCALED( v_start.x );
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v_start.y = SCALED( v_start.y );
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97 |
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v_last = outline->points[last];
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v_last.x = SCALED( v_last.x );
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v_last.y = SCALED( v_last.y );
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101 |
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v_control = v_start;
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103 |
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point = outline->points + first;
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tags = outline->tags + first;
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tag = FT_CURVE_TAG( tags[0] );
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107 |
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/* A contour cannot start with a cubic control point! */
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109 |
if ( tag == FT_CURVE_TAG_CUBIC )
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goto Invalid_Outline;
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111 |
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/* check first point to determine origin */
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if ( tag == FT_CURVE_TAG_CONIC )
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{
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/* first point is conic control. Yes, this happens. */
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if ( FT_CURVE_TAG( outline->tags[last] ) == FT_CURVE_TAG_ON )
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{
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/* start at last point if it is on the curve */
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v_start = v_last;
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limit--;
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}
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else
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{
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/* if both first and last points are conic, */
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/* start at their middle and record its position */
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/* for closure */
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v_start.x = ( v_start.x + v_last.x ) / 2;
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v_start.y = ( v_start.y + v_last.y ) / 2;
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129 |
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130 |
v_last = v_start;
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131 |
}
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132 |
point--;
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133 |
tags--;
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134 |
}
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135 |
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136 |
FT_TRACE5(( " move to (%.2f, %.2f)\n",
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v_start.x / 64.0, v_start.y / 64.0 ));
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error = func_interface->move_to( &v_start, user );
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if ( error )
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140 |
goto Exit;
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141 |
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142 |
while ( point < limit )
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143 |
{
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point++;
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tags++;
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146 |
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147 |
tag = FT_CURVE_TAG( tags[0] );
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148 |
switch ( tag )
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{
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150 |
case FT_CURVE_TAG_ON: /* emit a single line_to */
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151 |
{
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152 |
FT_Vector vec;
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153 |
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154 |
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155 |
vec.x = SCALED( point->x );
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156 |
vec.y = SCALED( point->y );
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157 |
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158 |
FT_TRACE5(( " line to (%.2f, %.2f)\n",
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159 |
vec.x / 64.0, vec.y / 64.0 ));
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160 |
error = func_interface->line_to( &vec, user );
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161 |
if ( error )
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goto Exit;
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163 |
continue;
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164 |
}
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165 |
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166 |
case FT_CURVE_TAG_CONIC: /* consume conic arcs */
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v_control.x = SCALED( point->x );
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v_control.y = SCALED( point->y );
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169 |
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Do_Conic:
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if ( point < limit )
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172 |
{
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173 |
FT_Vector vec;
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174 |
FT_Vector v_middle;
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175 |
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176 |
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point++;
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tags++;
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179 |
tag = FT_CURVE_TAG( tags[0] );
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180 |
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181 |
vec.x = SCALED( point->x );
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182 |
vec.y = SCALED( point->y );
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183 |
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184 |
if ( tag == FT_CURVE_TAG_ON )
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185 |
{
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186 |
FT_TRACE5(( " conic to (%.2f, %.2f)"
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" with control (%.2f, %.2f)\n",
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vec.x / 64.0, vec.y / 64.0,
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v_control.x / 64.0, v_control.y / 64.0 ));
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190 |
error = func_interface->conic_to( &v_control, &vec, user );
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191 |
if ( error )
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192 |
goto Exit;
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193 |
continue;
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194 |
}
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195 |
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196 |
if ( tag != FT_CURVE_TAG_CONIC )
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197 |
goto Invalid_Outline;
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198 |
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199 |
v_middle.x = ( v_control.x + vec.x ) / 2;
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200 |
v_middle.y = ( v_control.y + vec.y ) / 2;
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201 |
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202 |
FT_TRACE5(( " conic to (%.2f, %.2f)"
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203 |
" with control (%.2f, %.2f)\n",
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204 |
v_middle.x / 64.0, v_middle.y / 64.0,
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205 |
v_control.x / 64.0, v_control.y / 64.0 ));
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206 |
error = func_interface->conic_to( &v_control, &v_middle, user );
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207 |
if ( error )
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208 |
goto Exit;
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209 |
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210 |
v_control = vec;
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211 |
goto Do_Conic;
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212 |
}
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213 |
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214 |
FT_TRACE5(( " conic to (%.2f, %.2f)"
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215 |
" with control (%.2f, %.2f)\n",
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216 |
v_start.x / 64.0, v_start.y / 64.0,
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217 |
v_control.x / 64.0, v_control.y / 64.0 ));
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218 |
error = func_interface->conic_to( &v_control, &v_start, user );
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219 |
goto Close;
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220 |
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221 |
default: /* FT_CURVE_TAG_CUBIC */
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222 |
{
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223 |
FT_Vector vec1, vec2;
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224 |
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225 |
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226 |
if ( point + 1 > limit ||
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227 |
FT_CURVE_TAG( tags[1] ) != FT_CURVE_TAG_CUBIC )
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228 |
goto Invalid_Outline;
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229 |
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230 |
point += 2;
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231 |
tags += 2;
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232 |
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233 |
vec1.x = SCALED( point[-2].x );
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234 |
vec1.y = SCALED( point[-2].y );
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235 |
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236 |
vec2.x = SCALED( point[-1].x );
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237 |
vec2.y = SCALED( point[-1].y );
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238 |
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239 |
if ( point <= limit )
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240 |
{
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241 |
FT_Vector vec;
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242 |
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243 |
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244 |
vec.x = SCALED( point->x );
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245 |
vec.y = SCALED( point->y );
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246 |
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247 |
FT_TRACE5(( " cubic to (%.2f, %.2f)"
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248 |
" with controls (%.2f, %.2f) and (%.2f, %.2f)\n",
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249 |
vec.x / 64.0, vec.y / 64.0,
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250 |
vec1.x / 64.0, vec1.y / 64.0,
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251 |
vec2.x / 64.0, vec2.y / 64.0 ));
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252 |
error = func_interface->cubic_to( &vec1, &vec2, &vec, user );
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253 |
if ( error )
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254 |
goto Exit;
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255 |
continue;
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256 |
}
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257 |
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258 |
FT_TRACE5(( " cubic to (%.2f, %.2f)"
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259 |
" with controls (%.2f, %.2f) and (%.2f, %.2f)\n",
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260 |
v_start.x / 64.0, v_start.y / 64.0,
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261 |
vec1.x / 64.0, vec1.y / 64.0,
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262 |
vec2.x / 64.0, vec2.y / 64.0 ));
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263 |
error = func_interface->cubic_to( &vec1, &vec2, &v_start, user );
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264 |
goto Close;
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265 |
}
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266 |
}
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267 |
}
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268 |
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269 |
/* close the contour with a line segment */
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270 |
FT_TRACE5(( " line to (%.2f, %.2f)\n",
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271 |
v_start.x / 64.0, v_start.y / 64.0 ));
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272 |
error = func_interface->line_to( &v_start, user );
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273 |
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274 |
Close:
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275 |
if ( error )
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276 |
goto Exit;
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277 |
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278 |
first = last + 1;
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279 |
}
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280 |
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|
281 |
FT_TRACE5(( "FT_Outline_Decompose: Done\n", n ));
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282 |
return FT_Err_Ok;
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283 |
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284 |
Exit:
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285 |
FT_TRACE5(( "FT_Outline_Decompose: Error %d\n", error ));
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286 |
return error;
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287 |
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288 |
Invalid_Outline:
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289 |
return FT_Err_Invalid_Outline;
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290 |
}
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291 |
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292 |
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293 |
FT_EXPORT_DEF( FT_Error )
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294 |
FT_Outline_New_Internal( FT_Memory memory,
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295 |
FT_UInt numPoints,
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296 |
FT_Int numContours,
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297 |
FT_Outline *anoutline )
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|
298 |
{
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299 |
FT_Error error;
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300 |
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301 |
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302 |
if ( !anoutline || !memory )
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303 |
return FT_Err_Invalid_Argument;
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304 |
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305 |
*anoutline = null_outline;
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306 |
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|
307 |
if ( FT_NEW_ARRAY( anoutline->points, numPoints ) ||
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|
308 |
FT_NEW_ARRAY( anoutline->tags, numPoints ) ||
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|
309 |
FT_NEW_ARRAY( anoutline->contours, numContours ) )
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310 |
goto Fail;
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311 |
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312 |
anoutline->n_points = (FT_UShort)numPoints;
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313 |
anoutline->n_contours = (FT_Short)numContours;
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|
314 |
anoutline->flags |= FT_OUTLINE_OWNER;
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|
315 |
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|
316 |
return FT_Err_Ok;
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|
317 |
|
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|
318 |
Fail:
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|
319 |
anoutline->flags |= FT_OUTLINE_OWNER;
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|
320 |
FT_Outline_Done_Internal( memory, anoutline );
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321 |
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|
322 |
return error;
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|
323 |
}
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|
324 |
|
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325 |
|
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|
326 |
/* documentation is in ftoutln.h */
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|
327 |
|
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|
328 |
FT_EXPORT_DEF( FT_Error )
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|
329 |
FT_Outline_New( FT_Library library,
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|
330 |
FT_UInt numPoints,
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|
331 |
FT_Int numContours,
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|
332 |
FT_Outline *anoutline )
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|
|
333 |
{
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|
|
334 |
if ( !library )
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|
335 |
return FT_Err_Invalid_Library_Handle;
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|
|
336 |
|
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|
337 |
return FT_Outline_New_Internal( library->memory, numPoints,
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|
338 |
numContours, anoutline );
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|
339 |
}
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|
|
340 |
|
|
|
341 |
|
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|
342 |
/* documentation is in ftoutln.h */
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|
|
343 |
|
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|
344 |
FT_EXPORT_DEF( FT_Error )
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|
345 |
FT_Outline_Check( FT_Outline* outline )
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|
346 |
{
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|
347 |
if ( outline )
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|
348 |
{
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|
349 |
FT_Int n_points = outline->n_points;
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|
350 |
FT_Int n_contours = outline->n_contours;
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|
351 |
FT_Int end0, end;
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|
352 |
FT_Int n;
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|
|
353 |
|
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|
354 |
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|
355 |
/* empty glyph? */
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|
356 |
if ( n_points == 0 && n_contours == 0 )
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|
357 |
return 0;
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|
358 |
|
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|
359 |
/* check point and contour counts */
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|
360 |
if ( n_points <= 0 || n_contours <= 0 )
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|
361 |
goto Bad;
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|
362 |
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|
363 |
end0 = end = -1;
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|
364 |
for ( n = 0; n < n_contours; n++ )
|
|
|
365 |
{
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|
366 |
end = outline->contours[n];
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|
|
367 |
|
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|
368 |
/* note that we don't accept empty contours */
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|
369 |
if ( end <= end0 || end >= n_points )
|
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|
370 |
goto Bad;
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|
371 |
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|
372 |
end0 = end;
|
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|
373 |
}
|
|
|
374 |
|
|
|
375 |
if ( end != n_points - 1 )
|
|
|
376 |
goto Bad;
|
|
|
377 |
|
|
|
378 |
/* XXX: check the tags array */
|
|
|
379 |
return 0;
|
|
|
380 |
}
|
|
|
381 |
|
|
|
382 |
Bad:
|
|
|
383 |
return FT_Err_Invalid_Argument;
|
|
|
384 |
}
|
|
|
385 |
|
|
|
386 |
|
|
|
387 |
/* documentation is in ftoutln.h */
|
|
|
388 |
|
|
|
389 |
FT_EXPORT_DEF( FT_Error )
|
|
|
390 |
FT_Outline_Copy( const FT_Outline* source,
|
|
|
391 |
FT_Outline *target )
|
|
|
392 |
{
|
|
|
393 |
FT_Int is_owner;
|
|
|
394 |
|
|
|
395 |
|
|
|
396 |
if ( !source || !target ||
|
|
|
397 |
source->n_points != target->n_points ||
|
|
|
398 |
source->n_contours != target->n_contours )
|
|
|
399 |
return FT_Err_Invalid_Argument;
|
|
|
400 |
|
|
|
401 |
if ( source == target )
|
|
|
402 |
return FT_Err_Ok;
|
|
|
403 |
|
|
|
404 |
FT_ARRAY_COPY( target->points, source->points, source->n_points );
|
|
|
405 |
|
|
|
406 |
FT_ARRAY_COPY( target->tags, source->tags, source->n_points );
|
|
|
407 |
|
|
|
408 |
FT_ARRAY_COPY( target->contours, source->contours, source->n_contours );
|
|
|
409 |
|
|
|
410 |
/* copy all flags, except the `FT_OUTLINE_OWNER' one */
|
|
|
411 |
is_owner = target->flags & FT_OUTLINE_OWNER;
|
|
|
412 |
target->flags = source->flags;
|
|
|
413 |
|
|
|
414 |
target->flags &= ~FT_OUTLINE_OWNER;
|
|
|
415 |
target->flags |= is_owner;
|
|
|
416 |
|
|
|
417 |
return FT_Err_Ok;
|
|
|
418 |
}
|
|
|
419 |
|
|
|
420 |
|
|
|
421 |
FT_EXPORT_DEF( FT_Error )
|
|
|
422 |
FT_Outline_Done_Internal( FT_Memory memory,
|
|
|
423 |
FT_Outline* outline )
|
|
|
424 |
{
|
|
|
425 |
if ( memory && outline )
|
|
|
426 |
{
|
|
|
427 |
if ( outline->flags & FT_OUTLINE_OWNER )
|
|
|
428 |
{
|
|
|
429 |
FT_FREE( outline->points );
|
|
|
430 |
FT_FREE( outline->tags );
|
|
|
431 |
FT_FREE( outline->contours );
|
|
|
432 |
}
|
|
|
433 |
*outline = null_outline;
|
|
|
434 |
|
|
|
435 |
return FT_Err_Ok;
|
|
|
436 |
}
|
|
|
437 |
else
|
|
|
438 |
return FT_Err_Invalid_Argument;
|
|
|
439 |
}
|
|
|
440 |
|
|
|
441 |
|
|
|
442 |
/* documentation is in ftoutln.h */
|
|
|
443 |
|
|
|
444 |
FT_EXPORT_DEF( FT_Error )
|
|
|
445 |
FT_Outline_Done( FT_Library library,
|
|
|
446 |
FT_Outline* outline )
|
|
|
447 |
{
|
|
|
448 |
/* check for valid `outline' in FT_Outline_Done_Internal() */
|
|
|
449 |
|
|
|
450 |
if ( !library )
|
|
|
451 |
return FT_Err_Invalid_Library_Handle;
|
|
|
452 |
|
|
|
453 |
return FT_Outline_Done_Internal( library->memory, outline );
|
|
|
454 |
}
|
|
|
455 |
|
|
|
456 |
|
|
|
457 |
/* documentation is in ftoutln.h */
|
|
|
458 |
|
|
|
459 |
FT_EXPORT_DEF( void )
|
|
|
460 |
FT_Outline_Get_CBox( const FT_Outline* outline,
|
|
|
461 |
FT_BBox *acbox )
|
|
|
462 |
{
|
|
|
463 |
FT_Pos xMin, yMin, xMax, yMax;
|
|
|
464 |
|
|
|
465 |
|
|
|
466 |
if ( outline && acbox )
|
|
|
467 |
{
|
|
|
468 |
if ( outline->n_points == 0 )
|
|
|
469 |
{
|
|
|
470 |
xMin = 0;
|
|
|
471 |
yMin = 0;
|
|
|
472 |
xMax = 0;
|
|
|
473 |
yMax = 0;
|
|
|
474 |
}
|
|
|
475 |
else
|
|
|
476 |
{
|
|
|
477 |
FT_Vector* vec = outline->points;
|
|
|
478 |
FT_Vector* limit = vec + outline->n_points;
|
|
|
479 |
|
|
|
480 |
|
|
|
481 |
xMin = xMax = vec->x;
|
|
|
482 |
yMin = yMax = vec->y;
|
|
|
483 |
vec++;
|
|
|
484 |
|
|
|
485 |
for ( ; vec < limit; vec++ )
|
|
|
486 |
{
|
|
|
487 |
FT_Pos x, y;
|
|
|
488 |
|
|
|
489 |
|
|
|
490 |
x = vec->x;
|
|
|
491 |
if ( x < xMin ) xMin = x;
|
|
|
492 |
if ( x > xMax ) xMax = x;
|
|
|
493 |
|
|
|
494 |
y = vec->y;
|
|
|
495 |
if ( y < yMin ) yMin = y;
|
|
|
496 |
if ( y > yMax ) yMax = y;
|
|
|
497 |
}
|
|
|
498 |
}
|
|
|
499 |
acbox->xMin = xMin;
|
|
|
500 |
acbox->xMax = xMax;
|
|
|
501 |
acbox->yMin = yMin;
|
|
|
502 |
acbox->yMax = yMax;
|
|
|
503 |
}
|
|
|
504 |
}
|
|
|
505 |
|
|
|
506 |
|
|
|
507 |
/* documentation is in ftoutln.h */
|
|
|
508 |
|
|
|
509 |
FT_EXPORT_DEF( void )
|
|
|
510 |
FT_Outline_Translate( const FT_Outline* outline,
|
|
|
511 |
FT_Pos xOffset,
|
|
|
512 |
FT_Pos yOffset )
|
|
|
513 |
{
|
|
|
514 |
FT_UShort n;
|
|
|
515 |
FT_Vector* vec;
|
|
|
516 |
|
|
|
517 |
|
|
|
518 |
if ( !outline )
|
|
|
519 |
return;
|
|
|
520 |
|
|
|
521 |
vec = outline->points;
|
|
|
522 |
|
|
|
523 |
for ( n = 0; n < outline->n_points; n++ )
|
|
|
524 |
{
|
|
|
525 |
vec->x += xOffset;
|
|
|
526 |
vec->y += yOffset;
|
|
|
527 |
vec++;
|
|
|
528 |
}
|
|
|
529 |
}
|
|
|
530 |
|
|
|
531 |
|
|
|
532 |
/* documentation is in ftoutln.h */
|
|
|
533 |
|
|
|
534 |
FT_EXPORT_DEF( void )
|
|
|
535 |
FT_Outline_Reverse( FT_Outline* outline )
|
|
|
536 |
{
|
|
|
537 |
FT_UShort n;
|
|
|
538 |
FT_Int first, last;
|
|
|
539 |
|
|
|
540 |
|
|
|
541 |
if ( !outline )
|
|
|
542 |
return;
|
|
|
543 |
|
|
|
544 |
first = 0;
|
|
|
545 |
|
|
|
546 |
for ( n = 0; n < outline->n_contours; n++ )
|
|
|
547 |
{
|
|
|
548 |
last = outline->contours[n];
|
|
|
549 |
|
|
|
550 |
/* reverse point table */
|
|
|
551 |
{
|
|
|
552 |
FT_Vector* p = outline->points + first;
|
|
|
553 |
FT_Vector* q = outline->points + last;
|
|
|
554 |
FT_Vector swap;
|
|
|
555 |
|
|
|
556 |
|
|
|
557 |
while ( p < q )
|
|
|
558 |
{
|
|
|
559 |
swap = *p;
|
|
|
560 |
*p = *q;
|
|
|
561 |
*q = swap;
|
|
|
562 |
p++;
|
|
|
563 |
q--;
|
|
|
564 |
}
|
|
|
565 |
}
|
|
|
566 |
|
|
|
567 |
/* reverse tags table */
|
|
|
568 |
{
|
|
|
569 |
char* p = outline->tags + first;
|
|
|
570 |
char* q = outline->tags + last;
|
|
|
571 |
char swap;
|
|
|
572 |
|
|
|
573 |
|
|
|
574 |
while ( p < q )
|
|
|
575 |
{
|
|
|
576 |
swap = *p;
|
|
|
577 |
*p = *q;
|
|
|
578 |
*q = swap;
|
|
|
579 |
p++;
|
|
|
580 |
q--;
|
|
|
581 |
}
|
|
|
582 |
}
|
|
|
583 |
|
|
|
584 |
first = last + 1;
|
|
|
585 |
}
|
|
|
586 |
|
|
|
587 |
outline->flags ^= FT_OUTLINE_REVERSE_FILL;
|
|
|
588 |
}
|
|
|
589 |
|
|
|
590 |
|
|
|
591 |
/* documentation is in ftoutln.h */
|
|
|
592 |
|
|
|
593 |
FT_EXPORT_DEF( FT_Error )
|
|
|
594 |
FT_Outline_Render( FT_Library library,
|
|
|
595 |
FT_Outline* outline,
|
|
|
596 |
FT_Raster_Params* params )
|
|
|
597 |
{
|
|
|
598 |
FT_Error error;
|
|
|
599 |
FT_Bool update = FALSE;
|
|
|
600 |
FT_Renderer renderer;
|
|
|
601 |
FT_ListNode node;
|
|
|
602 |
|
|
|
603 |
|
|
|
604 |
if ( !library )
|
|
|
605 |
return FT_Err_Invalid_Library_Handle;
|
|
|
606 |
|
|
|
607 |
if ( !outline || !params )
|
|
|
608 |
return FT_Err_Invalid_Argument;
|
|
|
609 |
|
|
|
610 |
renderer = library->cur_renderer;
|
|
|
611 |
node = library->renderers.head;
|
|
|
612 |
|
|
|
613 |
params->source = (void*)outline;
|
|
|
614 |
|
|
|
615 |
error = FT_Err_Cannot_Render_Glyph;
|
|
|
616 |
while ( renderer )
|
|
|
617 |
{
|
|
|
618 |
error = renderer->raster_render( renderer->raster, params );
|
|
|
619 |
if ( !error || FT_ERROR_BASE( error ) != FT_Err_Cannot_Render_Glyph )
|
|
|
620 |
break;
|
|
|
621 |
|
|
|
622 |
/* FT_Err_Cannot_Render_Glyph is returned if the render mode */
|
|
|
623 |
/* is unsupported by the current renderer for this glyph image */
|
|
|
624 |
/* format */
|
|
|
625 |
|
|
|
626 |
/* now, look for another renderer that supports the same */
|
|
|
627 |
/* format */
|
|
|
628 |
renderer = FT_Lookup_Renderer( library, FT_GLYPH_FORMAT_OUTLINE,
|
|
|
629 |
&node );
|
|
|
630 |
update = TRUE;
|
|
|
631 |
}
|
|
|
632 |
|
|
|
633 |
/* if we changed the current renderer for the glyph image format */
|
|
|
634 |
/* we need to select it as the next current one */
|
|
|
635 |
if ( !error && update && renderer )
|
|
|
636 |
FT_Set_Renderer( library, renderer, 0, 0 );
|
|
|
637 |
|
|
|
638 |
return error;
|
|
|
639 |
}
|
|
|
640 |
|
|
|
641 |
|
|
|
642 |
/* documentation is in ftoutln.h */
|
|
|
643 |
|
|
|
644 |
FT_EXPORT_DEF( FT_Error )
|
|
|
645 |
FT_Outline_Get_Bitmap( FT_Library library,
|
|
|
646 |
FT_Outline* outline,
|
|
|
647 |
const FT_Bitmap *abitmap )
|
|
|
648 |
{
|
|
|
649 |
FT_Raster_Params params;
|
|
|
650 |
|
|
|
651 |
|
|
|
652 |
if ( !abitmap )
|
|
|
653 |
return FT_Err_Invalid_Argument;
|
|
|
654 |
|
|
|
655 |
/* other checks are delayed to FT_Outline_Render() */
|
|
|
656 |
|
|
|
657 |
params.target = abitmap;
|
|
|
658 |
params.flags = 0;
|
|
|
659 |
|
|
|
660 |
if ( abitmap->pixel_mode == FT_PIXEL_MODE_GRAY ||
|
|
|
661 |
abitmap->pixel_mode == FT_PIXEL_MODE_LCD ||
|
|
|
662 |
abitmap->pixel_mode == FT_PIXEL_MODE_LCD_V )
|
|
|
663 |
params.flags |= FT_RASTER_FLAG_AA;
|
|
|
664 |
|
|
|
665 |
return FT_Outline_Render( library, outline, ¶ms );
|
|
|
666 |
}
|
|
|
667 |
|
|
|
668 |
|
|
|
669 |
/* documentation is in freetype.h */
|
|
|
670 |
|
|
|
671 |
FT_EXPORT_DEF( void )
|
|
|
672 |
FT_Vector_Transform( FT_Vector* vector,
|
|
|
673 |
const FT_Matrix* matrix )
|
|
|
674 |
{
|
|
|
675 |
FT_Pos xz, yz;
|
|
|
676 |
|
|
|
677 |
|
|
|
678 |
if ( !vector || !matrix )
|
|
|
679 |
return;
|
|
|
680 |
|
|
|
681 |
xz = FT_MulFix( vector->x, matrix->xx ) +
|
|
|
682 |
FT_MulFix( vector->y, matrix->xy );
|
|
|
683 |
|
|
|
684 |
yz = FT_MulFix( vector->x, matrix->yx ) +
|
|
|
685 |
FT_MulFix( vector->y, matrix->yy );
|
|
|
686 |
|
|
|
687 |
vector->x = xz;
|
|
|
688 |
vector->y = yz;
|
|
|
689 |
}
|
|
|
690 |
|
|
|
691 |
|
|
|
692 |
/* documentation is in ftoutln.h */
|
|
|
693 |
|
|
|
694 |
FT_EXPORT_DEF( void )
|
|
|
695 |
FT_Outline_Transform( const FT_Outline* outline,
|
|
|
696 |
const FT_Matrix* matrix )
|
|
|
697 |
{
|
|
|
698 |
FT_Vector* vec;
|
|
|
699 |
FT_Vector* limit;
|
|
|
700 |
|
|
|
701 |
|
|
|
702 |
if ( !outline || !matrix )
|
|
|
703 |
return;
|
|
|
704 |
|
|
|
705 |
vec = outline->points;
|
|
|
706 |
limit = vec + outline->n_points;
|
|
|
707 |
|
|
|
708 |
for ( ; vec < limit; vec++ )
|
|
|
709 |
FT_Vector_Transform( vec, matrix );
|
|
|
710 |
}
|
|
|
711 |
|
|
|
712 |
|
|
|
713 |
#if 0
|
|
|
714 |
|
|
|
715 |
#define FT_OUTLINE_GET_CONTOUR( outline, c, first, last ) \
|
|
|
716 |
do { \
|
|
|
717 |
(first) = ( c > 0 ) ? (outline)->points + \
|
|
|
718 |
(outline)->contours[c - 1] + 1 \
|
|
|
719 |
: (outline)->points; \
|
|
|
720 |
(last) = (outline)->points + (outline)->contours[c]; \
|
|
|
721 |
} while ( 0 )
|
|
|
722 |
|
|
|
723 |
|
|
|
724 |
/* Is a point in some contour? */
|
|
|
725 |
/* */
|
|
|
726 |
/* We treat every point of the contour as if it */
|
|
|
727 |
/* it were ON. That is, we allow false positives, */
|
|
|
728 |
/* but disallow false negatives. (XXX really?) */
|
|
|
729 |
static FT_Bool
|
|
|
730 |
ft_contour_has( FT_Outline* outline,
|
|
|
731 |
FT_Short c,
|
|
|
732 |
FT_Vector* point )
|
|
|
733 |
{
|
|
|
734 |
FT_Vector* first;
|
|
|
735 |
FT_Vector* last;
|
|
|
736 |
FT_Vector* a;
|
|
|
737 |
FT_Vector* b;
|
|
|
738 |
FT_UInt n = 0;
|
|
|
739 |
|
|
|
740 |
|
|
|
741 |
FT_OUTLINE_GET_CONTOUR( outline, c, first, last );
|
|
|
742 |
|
|
|
743 |
for ( a = first; a <= last; a++ )
|
|
|
744 |
{
|
|
|
745 |
FT_Pos x;
|
|
|
746 |
FT_Int intersect;
|
|
|
747 |
|
|
|
748 |
|
|
|
749 |
b = ( a == last ) ? first : a + 1;
|
|
|
750 |
|
|
|
751 |
intersect = ( a->y - point->y ) ^ ( b->y - point->y );
|
|
|
752 |
|
|
|
753 |
/* a and b are on the same side */
|
|
|
754 |
if ( intersect >= 0 )
|
|
|
755 |
{
|
|
|
756 |
if ( intersect == 0 && a->y == point->y )
|
|
|
757 |
{
|
|
|
758 |
if ( ( a->x <= point->x && b->x >= point->x ) ||
|
|
|
759 |
( a->x >= point->x && b->x <= point->x ) )
|
|
|
760 |
return 1;
|
|
|
761 |
}
|
|
|
762 |
|
|
|
763 |
continue;
|
|
|
764 |
}
|
|
|
765 |
|
|
|
766 |
x = a->x + ( b->x - a->x ) * (point->y - a->y ) / ( b->y - a->y );
|
|
|
767 |
|
|
|
768 |
if ( x < point->x )
|
|
|
769 |
n++;
|
|
|
770 |
else if ( x == point->x )
|
|
|
771 |
return 1;
|
|
|
772 |
}
|
|
|
773 |
|
|
|
774 |
return ( n % 2 );
|
|
|
775 |
}
|
|
|
776 |
|
|
|
777 |
|
|
|
778 |
static FT_Bool
|
|
|
779 |
ft_contour_enclosed( FT_Outline* outline,
|
|
|
780 |
FT_UShort c )
|
|
|
781 |
{
|
|
|
782 |
FT_Vector* first;
|
|
|
783 |
FT_Vector* last;
|
|
|
784 |
FT_Short i;
|
|
|
785 |
|
|
|
786 |
|
|
|
787 |
FT_OUTLINE_GET_CONTOUR( outline, c, first, last );
|
|
|
788 |
|
|
|
789 |
for ( i = 0; i < outline->n_contours; i++ )
|
|
|
790 |
{
|
|
|
791 |
if ( i != c && ft_contour_has( outline, i, first ) )
|
|
|
792 |
{
|
|
|
793 |
FT_Vector* pt;
|
|
|
794 |
|
|
|
795 |
|
|
|
796 |
for ( pt = first + 1; pt <= last; pt++ )
|
|
|
797 |
if ( !ft_contour_has( outline, i, pt ) )
|
|
|
798 |
return 0;
|
|
|
799 |
|
|
|
800 |
return 1;
|
|
|
801 |
}
|
|
|
802 |
}
|
|
|
803 |
|
|
|
804 |
return 0;
|
|
|
805 |
}
|
|
|
806 |
|
|
|
807 |
|
|
|
808 |
/* This version differs from the public one in that each */
|
|
|
809 |
/* part (contour not enclosed in another contour) of the */
|
|
|
810 |
/* outline is checked for orientation. This is */
|
|
|
811 |
/* necessary for some buggy CJK fonts. */
|
|
|
812 |
static FT_Orientation
|
|
|
813 |
ft_outline_get_orientation( FT_Outline* outline )
|
|
|
814 |
{
|
|
|
815 |
FT_Short i;
|
|
|
816 |
FT_Vector* first;
|
|
|
817 |
FT_Vector* last;
|
|
|
818 |
FT_Orientation orient = FT_ORIENTATION_NONE;
|
|
|
819 |
|
|
|
820 |
|
|
|
821 |
first = outline->points;
|
|
|
822 |
for ( i = 0; i < outline->n_contours; i++, first = last + 1 )
|
|
|
823 |
{
|
|
|
824 |
FT_Vector* point;
|
|
|
825 |
FT_Vector* xmin_point;
|
|
|
826 |
FT_Pos xmin;
|
|
|
827 |
|
|
|
828 |
|
|
|
829 |
last = outline->points + outline->contours[i];
|
|
|
830 |
|
|
|
831 |
/* skip degenerate contours */
|
|
|
832 |
if ( last < first + 2 )
|
|
|
833 |
continue;
|
|
|
834 |
|
|
|
835 |
if ( ft_contour_enclosed( outline, i ) )
|
|
|
836 |
continue;
|
|
|
837 |
|
|
|
838 |
xmin = first->x;
|
|
|
839 |
xmin_point = first;
|
|
|
840 |
|
|
|
841 |
for ( point = first + 1; point <= last; point++ )
|
|
|
842 |
{
|
|
|
843 |
if ( point->x < xmin )
|
|
|
844 |
{
|
|
|
845 |
xmin = point->x;
|
|
|
846 |
xmin_point = point;
|
|
|
847 |
}
|
|
|
848 |
}
|
|
|
849 |
|
|
|
850 |
/* check the orientation of the contour */
|
|
|
851 |
{
|
|
|
852 |
FT_Vector* prev;
|
|
|
853 |
FT_Vector* next;
|
|
|
854 |
FT_Orientation o;
|
|
|
855 |
|
|
|
856 |
|
|
|
857 |
prev = ( xmin_point == first ) ? last : xmin_point - 1;
|
|
|
858 |
next = ( xmin_point == last ) ? first : xmin_point + 1;
|
|
|
859 |
|
|
|
860 |
if ( FT_Atan2( prev->x - xmin_point->x, prev->y - xmin_point->y ) >
|
|
|
861 |
FT_Atan2( next->x - xmin_point->x, next->y - xmin_point->y ) )
|
|
|
862 |
o = FT_ORIENTATION_POSTSCRIPT;
|
|
|
863 |
else
|
|
|
864 |
o = FT_ORIENTATION_TRUETYPE;
|
|
|
865 |
|
|
|
866 |
if ( orient == FT_ORIENTATION_NONE )
|
|
|
867 |
orient = o;
|
|
|
868 |
else if ( orient != o )
|
|
|
869 |
return FT_ORIENTATION_NONE;
|
|
|
870 |
}
|
|
|
871 |
}
|
|
|
872 |
|
|
|
873 |
return orient;
|
|
|
874 |
}
|
|
|
875 |
|
|
|
876 |
#endif /* 0 */
|
|
|
877 |
|
|
|
878 |
|
|
|
879 |
/* documentation is in ftoutln.h */
|
|
|
880 |
|
|
|
881 |
FT_EXPORT_DEF( FT_Error )
|
|
|
882 |
FT_Outline_Embolden( FT_Outline* outline,
|
|
|
883 |
FT_Pos strength )
|
|
|
884 |
{
|
|
|
885 |
FT_Vector* points;
|
|
|
886 |
FT_Vector v_prev, v_first, v_next, v_cur;
|
|
|
887 |
FT_Angle rotate, angle_in, angle_out;
|
|
|
888 |
FT_Int c, n, first;
|
|
|
889 |
FT_Int orientation;
|
|
|
890 |
|
|
|
891 |
|
|
|
892 |
if ( !outline )
|
|
|
893 |
return FT_Err_Invalid_Argument;
|
|
|
894 |
|
|
|
895 |
strength /= 2;
|
|
|
896 |
if ( strength == 0 )
|
|
|
897 |
return FT_Err_Ok;
|
|
|
898 |
|
|
|
899 |
orientation = FT_Outline_Get_Orientation( outline );
|
|
|
900 |
if ( orientation == FT_ORIENTATION_NONE )
|
|
|
901 |
{
|
|
|
902 |
if ( outline->n_contours )
|
|
|
903 |
return FT_Err_Invalid_Argument;
|
|
|
904 |
else
|
|
|
905 |
return FT_Err_Ok;
|
|
|
906 |
}
|
|
|
907 |
|
|
|
908 |
if ( orientation == FT_ORIENTATION_TRUETYPE )
|
|
|
909 |
rotate = -FT_ANGLE_PI2;
|
|
|
910 |
else
|
|
|
911 |
rotate = FT_ANGLE_PI2;
|
|
|
912 |
|
|
|
913 |
points = outline->points;
|
|
|
914 |
|
|
|
915 |
first = 0;
|
|
|
916 |
for ( c = 0; c < outline->n_contours; c++ )
|
|
|
917 |
{
|
|
|
918 |
int last = outline->contours[c];
|
|
|
919 |
|
|
|
920 |
|
|
|
921 |
v_first = points[first];
|
|
|
922 |
v_prev = points[last];
|
|
|
923 |
v_cur = v_first;
|
|
|
924 |
|
|
|
925 |
for ( n = first; n <= last; n++ )
|
|
|
926 |
{
|
|
|
927 |
FT_Vector in, out;
|
|
|
928 |
FT_Angle angle_diff;
|
|
|
929 |
FT_Pos d;
|
|
|
930 |
FT_Fixed scale;
|
|
|
931 |
|
|
|
932 |
|
|
|
933 |
if ( n < last )
|
|
|
934 |
v_next = points[n + 1];
|
|
|
935 |
else
|
|
|
936 |
v_next = v_first;
|
|
|
937 |
|
|
|
938 |
/* compute the in and out vectors */
|
|
|
939 |
in.x = v_cur.x - v_prev.x;
|
|
|
940 |
in.y = v_cur.y - v_prev.y;
|
|
|
941 |
|
|
|
942 |
out.x = v_next.x - v_cur.x;
|
|
|
943 |
out.y = v_next.y - v_cur.y;
|
|
|
944 |
|
|
|
945 |
angle_in = FT_Atan2( in.x, in.y );
|
|
|
946 |
angle_out = FT_Atan2( out.x, out.y );
|
|
|
947 |
angle_diff = FT_Angle_Diff( angle_in, angle_out );
|
|
|
948 |
scale = FT_Cos( angle_diff / 2 );
|
|
|
949 |
|
|
|
950 |
if ( scale < 0x4000L && scale > -0x4000L )
|
|
|
951 |
in.x = in.y = 0;
|
|
|
952 |
else
|
|
|
953 |
{
|
|
|
954 |
d = FT_DivFix( strength, scale );
|
|
|
955 |
|
|
|
956 |
FT_Vector_From_Polar( &in, d, angle_in + angle_diff / 2 - rotate );
|
|
|
957 |
}
|
|
|
958 |
|
|
|
959 |
outline->points[n].x = v_cur.x + strength + in.x;
|
|
|
960 |
outline->points[n].y = v_cur.y + strength + in.y;
|
|
|
961 |
|
|
|
962 |
v_prev = v_cur;
|
|
|
963 |
v_cur = v_next;
|
|
|
964 |
}
|
|
|
965 |
|
|
|
966 |
first = last + 1;
|
|
|
967 |
}
|
|
|
968 |
|
|
|
969 |
return FT_Err_Ok;
|
|
|
970 |
}
|
|
|
971 |
|
|
|
972 |
|
|
|
973 |
/* documentation is in ftoutln.h */
|
|
|
974 |
|
|
|
975 |
FT_EXPORT_DEF( FT_Orientation )
|
|
|
976 |
FT_Outline_Get_Orientation( FT_Outline* outline )
|
|
|
977 |
{
|
|
|
978 |
FT_Pos xmin = 32768L;
|
|
|
979 |
FT_Pos xmin_ymin = 32768L;
|
|
|
980 |
FT_Pos xmin_ymax = -32768L;
|
|
|
981 |
FT_Vector* xmin_first = NULL;
|
|
|
982 |
FT_Vector* xmin_last = NULL;
|
|
|
983 |
|
|
|
984 |
short* contour;
|
|
|
985 |
|
|
|
986 |
FT_Vector* first;
|
|
|
987 |
FT_Vector* last;
|
|
|
988 |
FT_Vector* prev;
|
|
|
989 |
FT_Vector* point;
|
|
|
990 |
|
|
|
991 |
int i;
|
|
|
992 |
FT_Pos ray_y[3];
|
|
|
993 |
FT_Orientation result[3] =
|
|
|
994 |
{ FT_ORIENTATION_NONE, FT_ORIENTATION_NONE, FT_ORIENTATION_NONE };
|
|
|
995 |
|
|
|
996 |
|
|
|
997 |
if ( !outline || outline->n_points <= 0 )
|
|
|
998 |
return FT_ORIENTATION_TRUETYPE;
|
|
|
999 |
|
|
|
1000 |
/* We use the nonzero winding rule to find the orientation. */
|
|
|
1001 |
/* Since glyph outlines behave much more `regular' than arbitrary */
|
|
|
1002 |
/* cubic or quadratic curves, this test deals with the polygon */
|
|
|
1003 |
/* only which is spanned up by the control points. */
|
|
|
1004 |
|
|
|
1005 |
first = outline->points;
|
|
|
1006 |
for ( contour = outline->contours;
|
|
|
1007 |
contour < outline->contours + outline->n_contours;
|
|
|
1008 |
contour++, first = last + 1 )
|
|
|
1009 |
{
|
|
|
1010 |
FT_Pos contour_xmin = 32768L;
|
|
|
1011 |
FT_Pos contour_xmax = -32768L;
|
|
|
1012 |
FT_Pos contour_ymin = 32768L;
|
|
|
1013 |
FT_Pos contour_ymax = -32768L;
|
|
|
1014 |
|
|
|
1015 |
|
|
|
1016 |
last = outline->points + *contour;
|
|
|
1017 |
|
|
|
1018 |
/* skip degenerate contours */
|
|
|
1019 |
if ( last < first + 2 )
|
|
|
1020 |
continue;
|
|
|
1021 |
|
|
|
1022 |
for ( point = first; point <= last; ++point )
|
|
|
1023 |
{
|
|
|
1024 |
if ( point->x < contour_xmin )
|
|
|
1025 |
contour_xmin = point->x;
|
|
|
1026 |
|
|
|
1027 |
if ( point->x > contour_xmax )
|
|
|
1028 |
contour_xmax = point->x;
|
|
|
1029 |
|
|
|
1030 |
if ( point->y < contour_ymin )
|
|
|
1031 |
contour_ymin = point->y;
|
|
|
1032 |
|
|
|
1033 |
if ( point->y > contour_ymax )
|
|
|
1034 |
contour_ymax = point->y;
|
|
|
1035 |
}
|
|
|
1036 |
|
|
|
1037 |
if ( contour_xmin < xmin &&
|
|
|
1038 |
contour_xmin != contour_xmax &&
|
|
|
1039 |
contour_ymin != contour_ymax )
|
|
|
1040 |
{
|
|
|
1041 |
xmin = contour_xmin;
|
|
|
1042 |
xmin_ymin = contour_ymin;
|
|
|
1043 |
xmin_ymax = contour_ymax;
|
|
|
1044 |
xmin_first = first;
|
|
|
1045 |
xmin_last = last;
|
|
|
1046 |
}
|
|
|
1047 |
}
|
|
|
1048 |
|
|
|
1049 |
if ( xmin == 32768L )
|
|
|
1050 |
return FT_ORIENTATION_TRUETYPE;
|
|
|
1051 |
|
|
|
1052 |
ray_y[0] = ( xmin_ymin * 3 + xmin_ymax ) >> 2;
|
|
|
1053 |
ray_y[1] = ( xmin_ymin + xmin_ymax ) >> 1;
|
|
|
1054 |
ray_y[2] = ( xmin_ymin + xmin_ymax * 3 ) >> 2;
|
|
|
1055 |
|
|
|
1056 |
for ( i = 0; i < 3; i++ )
|
|
|
1057 |
{
|
|
|
1058 |
FT_Pos left_x;
|
|
|
1059 |
FT_Pos right_x;
|
|
|
1060 |
FT_Vector* left1;
|
|
|
1061 |
FT_Vector* left2;
|
|
|
1062 |
FT_Vector* right1;
|
|
|
1063 |
FT_Vector* right2;
|
|
|
1064 |
|
|
|
1065 |
|
|
|
1066 |
RedoRay:
|
|
|
1067 |
left_x = 32768L;
|
|
|
1068 |
right_x = -32768L;
|
|
|
1069 |
|
|
|
1070 |
left1 = left2 = right1 = right2 = NULL;
|
|
|
1071 |
|
|
|
1072 |
prev = xmin_last;
|
|
|
1073 |
for ( point = xmin_first; point <= xmin_last; prev = point, ++point )
|
|
|
1074 |
{
|
|
|
1075 |
FT_Pos tmp_x;
|
|
|
1076 |
|
|
|
1077 |
|
|
|
1078 |
if ( point->y == ray_y[i] || prev->y == ray_y[i] )
|
|
|
1079 |
{
|
|
|
1080 |
ray_y[i]++;
|
|
|
1081 |
goto RedoRay;
|
|
|
1082 |
}
|
|
|
1083 |
|
|
|
1084 |
if ( ( point->y < ray_y[i] && prev->y < ray_y[i] ) ||
|
|
|
1085 |
( point->y > ray_y[i] && prev->y > ray_y[i] ) )
|
|
|
1086 |
continue;
|
|
|
1087 |
|
|
|
1088 |
tmp_x = FT_MulDiv( point->x - prev->x,
|
|
|
1089 |
ray_y[i] - prev->y,
|
|
|
1090 |
point->y - prev->y ) + prev->x;
|
|
|
1091 |
|
|
|
1092 |
if ( tmp_x < left_x )
|
|
|
1093 |
{
|
|
|
1094 |
left_x = tmp_x;
|
|
|
1095 |
left1 = prev;
|
|
|
1096 |
left2 = point;
|
|
|
1097 |
}
|
|
|
1098 |
|
|
|
1099 |
if ( tmp_x > right_x )
|
|
|
1100 |
{
|
|
|
1101 |
right_x = tmp_x;
|
|
|
1102 |
right1 = prev;
|
|
|
1103 |
right2 = point;
|
|
|
1104 |
}
|
|
|
1105 |
}
|
|
|
1106 |
|
|
|
1107 |
if ( left1 && right1 )
|
|
|
1108 |
{
|
|
|
1109 |
if ( left1->y < left2->y && right1->y > right2->y )
|
|
|
1110 |
result[i] = FT_ORIENTATION_TRUETYPE;
|
|
|
1111 |
else if ( left1->y > left2->y && right1->y < right2->y )
|
|
|
1112 |
result[i] = FT_ORIENTATION_POSTSCRIPT;
|
|
|
1113 |
else
|
|
|
1114 |
result[i] = FT_ORIENTATION_NONE;
|
|
|
1115 |
}
|
|
|
1116 |
}
|
|
|
1117 |
|
|
|
1118 |
if ( result[0] != FT_ORIENTATION_NONE &&
|
|
|
1119 |
( result[0] == result[1] || result[0] == result[2] ) )
|
|
|
1120 |
return result[0];
|
|
|
1121 |
|
|
|
1122 |
if ( result[1] != FT_ORIENTATION_NONE && result[1] == result[2] )
|
|
|
1123 |
return result[1];
|
|
|
1124 |
|
|
|
1125 |
return FT_ORIENTATION_TRUETYPE;
|
|
|
1126 |
}
|
|
|
1127 |
|
|
|
1128 |
|
|
|
1129 |
/* END */
|