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jeremybenn |
/* gnu_java_awt_FreetypeGlyphVector.c
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#define PANGO_ENABLE_ENGINE
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#include <jni.h>
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#include <gtk/gtk.h>
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#include <string.h>
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#include <pango/pango.h>
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#include <pango/pangoft2.h>
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#include <pango/pangofc-font.h>
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#include <freetype/ftglyph.h>
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#include <freetype/ftoutln.h>
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#include "jcl.h"
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#include "gdkfont.h"
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#include "gnu_java_awt_peer_gtk_FreetypeGlyphVector.h"
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#include "cairographics2d.h"
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typedef struct gp
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{
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JNIEnv *env;
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jobject obj;
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double px;
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double py;
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double sx;
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double sy;
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} generalpath ;
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static PangoFcFont *
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getFont(JNIEnv *env, jobject obj)
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{
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jfieldID fid;
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jobject data;
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jclass cls;
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struct peerfont *pfont;
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cls = (*env)->GetObjectClass (env, obj);
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fid = (*env)->GetFieldID (env, cls, "peer",
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"Lgnu/java/awt/peer/gtk/GdkFontPeer;");
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g_assert (fid != 0);
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data = (*env)->GetObjectField (env, obj, fid);
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g_assert (data != NULL);
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pfont = (struct peerfont *) gtkpeer_get_font(env, data);
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g_assert (pfont != NULL);
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g_assert (pfont->font != NULL);
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return (PangoFcFont *)pfont->font;
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}
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static PangoFontset *
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getFontSet(JNIEnv *env, jobject obj)
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{
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jfieldID fid;
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jobject data;
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jclass cls;
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struct peerfont *pfont;
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cls = (*env)->GetObjectClass (env, obj);
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fid = (*env)->GetFieldID (env, cls, "peer",
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"Lgnu/java/awt/peer/gtk/GdkFontPeer;");
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g_assert (fid != 0);
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data = (*env)->GetObjectField (env, obj, fid);
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g_assert (data != NULL);
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pfont = (struct peerfont *) gtkpeer_get_font (env, data);
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g_assert (pfont != NULL);
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g_assert (pfont->font != NULL);
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return (PangoFontset *)pfont->set;
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}
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getGlyphs
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(JNIEnv *env, jobject obj, jintArray codepoints, jintArray glyphs,
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jlongArray fonts)
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{
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PangoFcFont *default_font, *current_font;
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PangoFontset *pfs;
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jint *cpvals;
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jint length;
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int i;
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/* Set up default font and fontset */
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default_font = getFont(env, obj);
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current_font = default_font;
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pfs = getFontSet(env, obj);
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/* Retrieve string information */
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length = (*env)->GetArrayLength (env, codepoints);
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cpvals = (*env)->GetIntArrayElements (env, codepoints, NULL);
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jint *glyphArray = (*env)->GetIntArrayElements (env, glyphs, NULL);
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jlong *fontArray = (*env)->GetLongArrayElements (env, fonts, NULL);
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/* A design goal of Pango is to be threadsafe, but it's admitted that it is
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* not actually threadsafe at the moment. Using gdk locking here to be safe,
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* but I don't know if if actually helps at all... */
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gdk_threads_enter();
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for( i = 0; i < length; i++ )
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{
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/* Ensure the current font has the requested character; if it doesn't,
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* try the default font before pulling a new font out of the fontset.
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* Once chosen, a font will be used until a character not in the font is
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* encountered. */
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if (!pango_fc_font_has_char(current_font, cpvals[i]))
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{
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if (pango_fc_font_has_char(default_font, cpvals[i]))
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{
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current_font = default_font;
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g_object_ref(current_font);
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}
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else
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{
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current_font = (PangoFcFont*)pango_fontset_get_font(pfs, cpvals[i]);
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}
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}
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else
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{
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g_object_ref(current_font);
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}
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/* Get glyph, and store both glyph and pointer to font */
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glyphArray[i] = (int)pango_fc_font_get_glyph(current_font,
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(gunichar)cpvals[i]);
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fontArray[i] = PTR_TO_JLONG(current_font);
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}
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gdk_threads_leave();
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(*env)->ReleaseIntArrayElements (env, glyphs, glyphArray, 0);
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(*env)->ReleaseIntArrayElements (env, codepoints, cpvals, 0);
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(*env)->ReleaseLongArrayElements (env, fonts, fontArray, 0);
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}
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JNIEXPORT void JNICALL
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Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getKerning
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(JNIEnv *env, jobject obj __attribute__((unused)), jint rightGlyph,
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jint leftGlyph, jlong fnt, jfloatArray p)
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{
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FT_Face ft_face;
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FT_Vector kern;
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PangoFcFont *font;
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font = JLONG_TO_PTR(PangoFcFont, fnt);
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ft_face = pango_fc_font_lock_face( font );
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g_assert (ft_face != NULL);
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FT_Get_Kerning( ft_face, rightGlyph, leftGlyph, FT_KERNING_DEFAULT, &kern );
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pango_fc_font_unlock_face( font );
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jfloat *pelements = (*env)->GetPrimitiveArrayCritical(env, p, NULL);
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pelements[0] = (jfloat)kern.x/64.0;
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pelements[1] = (jfloat)kern.y/64.0;
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(*env)->ReleasePrimitiveArrayCritical (env, p, pelements, 0);
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}
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JNIEXPORT jdoubleArray JNICALL
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Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getMetricsNative
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(JNIEnv *env, jobject obj __attribute__((unused)), jint glyphIndex, jlong fnt)
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{
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FT_Face ft_face;
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jdouble *values;
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jdoubleArray retArray = NULL;
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PangoFcFont *font;
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font = JLONG_TO_PTR(PangoFcFont, fnt);
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ft_face = pango_fc_font_lock_face( font );
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g_assert (ft_face != NULL);
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FT_Set_Transform( ft_face, NULL, NULL );
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if( FT_Load_Glyph( ft_face, glyphIndex, FT_LOAD_NO_BITMAP ) != 0 )
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{
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pango_fc_font_unlock_face( font );
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printf("Couldn't load glyph %i\n", glyphIndex);
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return NULL;
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}
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retArray = (*env)->NewDoubleArray (env, 8);
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values = (*env)->GetDoubleArrayElements (env, retArray, NULL);
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values[0] = 0;
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values[1] = (jdouble)ft_face->glyph->advance.x/64.0;
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values[2] = (jdouble)ft_face->glyph->advance.y/64.0;
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values[3] = (jdouble)ft_face->glyph->metrics.horiBearingX/64.0;
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values[4] = -(jdouble)ft_face->glyph->metrics.horiBearingY/64.0;
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values[5] = (jdouble)ft_face->glyph->metrics.width/64.0;
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values[6] = (jdouble)ft_face->glyph->metrics.height/64.0;
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values[7] = 0;
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(*env)->ReleaseDoubleArrayElements (env, retArray, values, 0);
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pango_fc_font_unlock_face( font );
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return retArray;
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}
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/* GetOutline code follows ****************************/
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/********* Freetype callback functions *****************************/
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static int _moveTo( const FT_Vector* to,
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void *p)
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{
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JNIEnv *env;
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jobject obj;
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jclass cls;
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jmethodID method;
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jvalue values[2];
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generalpath *path = (generalpath *) p;
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env = path->env;
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obj = path->obj;
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values[0].f = (jfloat)(to->x * path->sx + path->px);
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values[1].f = (jfloat)(to->y * path->sy + path->py);
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cls = (*env)->FindClass (env, "java/awt/geom/GeneralPath");
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method = (*env)->GetMethodID (env, cls, "moveTo", "(FF)V");
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(*env)->CallVoidMethodA(env, obj, method, values );
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return 0;
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}
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static int _lineTo( const FT_Vector* to,
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void *p)
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{
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JNIEnv *env;
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jobject obj;
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jclass cls;
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jmethodID method;
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jvalue values[2];
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generalpath *path = (generalpath *) p;
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env = path->env;
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obj = path->obj;
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values[0].f = (jfloat)(to->x * path->sx + path->px);
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values[1].f = (jfloat)(to->y * path->sy + path->py);
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cls = (*env)->FindClass (env, "java/awt/geom/GeneralPath");
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method = (*env)->GetMethodID (env, cls, "lineTo", "(FF)V");
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(*env)->CallVoidMethodA(env, obj, method, values );
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280 |
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return 0;
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}
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282 |
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283 |
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static int _quadTo( const FT_Vector* cp,
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const FT_Vector* to,
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void *p)
|
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{
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JNIEnv *env;
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288 |
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jobject obj;
|
289 |
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jclass cls;
|
290 |
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jmethodID method;
|
291 |
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jvalue values[4];
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generalpath *path = (generalpath *) p;
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293 |
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294 |
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env = path->env;
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295 |
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obj = path->obj;
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296 |
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values[0].f = (jfloat)(cp->x * path->sx + path->px);
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297 |
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values[1].f = (jfloat)(cp->y * path->sy + path->py);
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298 |
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values[2].f = (jfloat)(to->x * path->sx + path->px);
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299 |
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values[3].f = (jfloat)(to->y * path->sy + path->py);
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300 |
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301 |
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cls = (*env)->FindClass (env, "java/awt/geom/GeneralPath");
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method = (*env)->GetMethodID (env, cls, "quadTo", "(FFFF)V");
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303 |
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(*env)->CallVoidMethodA(env, obj, method, values );
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304 |
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305 |
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return 0;
|
306 |
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}
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307 |
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|
308 |
|
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static int _curveTo( const FT_Vector* cp1,
|
309 |
|
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const FT_Vector* cp2,
|
310 |
|
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const FT_Vector* to,
|
311 |
|
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void *p)
|
312 |
|
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{
|
313 |
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JNIEnv *env;
|
314 |
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jobject obj;
|
315 |
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jclass cls;
|
316 |
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jmethodID method;
|
317 |
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jvalue values[6];
|
318 |
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generalpath *path = (generalpath *) p;
|
319 |
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320 |
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env = path->env;
|
321 |
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obj = path->obj;
|
322 |
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values[0].f = (jfloat)(cp1->x * path->sx + path->px);
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values[1].f = (jfloat)(cp1->y * path->sy + path->py);
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values[2].f = (jfloat)(cp2->x * path->sx + path->px);
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values[3].f = (jfloat)(cp2->y * path->sy + path->py);
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values[4].f = (jfloat)(to->x * path->sx + path->px);
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values[5].f = (jfloat)(to->y * path->sy + path->py);
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328 |
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329 |
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cls = (*env)->FindClass (env, "java/awt/geom/GeneralPath");
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330 |
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method = (*env)->GetMethodID (env, cls, "curveTo", "(FFFFFF)V");
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(*env)->CallVoidMethodA(env, obj, method, values );
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332 |
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333 |
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return 0;
|
334 |
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}
|
335 |
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336 |
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|
337 |
|
|
JNIEXPORT jobject JNICALL
|
338 |
|
|
Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getGlyphOutlineNative
|
339 |
|
|
(JNIEnv *env, jobject obj __attribute__((unused)), jint glyphIndex, jlong fnt)
|
340 |
|
|
{
|
341 |
|
|
generalpath *path;
|
342 |
|
|
jobject gp;
|
343 |
|
|
FT_Outline_Funcs ftCallbacks =
|
344 |
|
|
{
|
345 |
|
|
(FT_Outline_MoveToFunc) _moveTo,
|
346 |
|
|
(FT_Outline_LineToFunc) _lineTo,
|
347 |
|
|
(FT_Outline_ConicToFunc) _quadTo,
|
348 |
|
|
(FT_Outline_CubicToFunc) _curveTo,
|
349 |
|
|
0,
|
350 |
|
|
|
351 |
|
|
};
|
352 |
|
|
PangoFcFont *font;
|
353 |
|
|
FT_Face ft_face;
|
354 |
|
|
FT_Glyph glyph;
|
355 |
|
|
|
356 |
|
|
font = JLONG_TO_PTR(PangoFcFont, fnt);
|
357 |
|
|
ft_face = pango_fc_font_lock_face( font );
|
358 |
|
|
|
359 |
|
|
g_assert (ft_face != NULL);
|
360 |
|
|
|
361 |
|
|
path = g_malloc0 (sizeof (generalpath));
|
362 |
|
|
g_assert(path != NULL);
|
363 |
|
|
path->env = env;
|
364 |
|
|
|
365 |
|
|
path->px = path->py = 0.0;
|
366 |
|
|
path->sx = 1.0/64.0;
|
367 |
|
|
path->sy = -1.0/64.0;
|
368 |
|
|
|
369 |
|
|
{ /* create a GeneralPath instance */
|
370 |
|
|
jclass cls;
|
371 |
|
|
jmethodID method;
|
372 |
|
|
|
373 |
|
|
cls = (*env)->FindClass (env, "java/awt/geom/GeneralPath");
|
374 |
|
|
method = (*env)->GetMethodID (env, cls, "<init>", "()V");
|
375 |
|
|
gp = path->obj = (*env)->NewObject (env, cls, method);
|
376 |
|
|
}
|
377 |
|
|
|
378 |
|
|
if(FT_Load_Glyph(ft_face,
|
379 |
|
|
(FT_UInt)(glyphIndex),
|
380 |
|
|
FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP) != 0)
|
381 |
|
|
{
|
382 |
|
|
pango_fc_font_unlock_face( font );
|
383 |
|
|
g_free(path);
|
384 |
|
|
return NULL;
|
385 |
|
|
}
|
386 |
|
|
|
387 |
|
|
FT_Get_Glyph( ft_face->glyph, &glyph );
|
388 |
|
|
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE)
|
389 |
|
|
{
|
390 |
|
|
FT_Outline_Decompose (&(((FT_OutlineGlyph)glyph)->outline),
|
391 |
|
|
&ftCallbacks, path);
|
392 |
|
|
}
|
393 |
|
|
else
|
394 |
|
|
{
|
395 |
|
|
char format[5];
|
396 |
|
|
|
397 |
|
|
format[0] = (glyph->format & 0xFF000000) >> 24;
|
398 |
|
|
format[1] = (glyph->format & 0x00FF0000) >> 16;
|
399 |
|
|
format[2] = (glyph->format & 0x0000FF00) >> 8;
|
400 |
|
|
format[3] = (glyph->format & 0x000000FF);
|
401 |
|
|
format[4] = '\0';
|
402 |
|
|
printf("WARNING: Unable to create outline for font %s %s of format %s\n",
|
403 |
|
|
ft_face->family_name, ft_face->style_name, format);
|
404 |
|
|
}
|
405 |
|
|
FT_Done_Glyph( glyph );
|
406 |
|
|
|
407 |
|
|
pango_fc_font_unlock_face( font );
|
408 |
|
|
|
409 |
|
|
g_free(path);
|
410 |
|
|
|
411 |
|
|
return gp;
|
412 |
|
|
}
|
413 |
|
|
|
414 |
|
|
JNIEXPORT void JNICALL
|
415 |
|
|
Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_dispose
|
416 |
|
|
(JNIEnv *env, jobject obj __attribute__((unused)), jlongArray fontset)
|
417 |
|
|
{
|
418 |
|
|
PangoFcFont *font;
|
419 |
|
|
jlong *fontArray;
|
420 |
|
|
int i, length;
|
421 |
|
|
|
422 |
|
|
length = (*env)->GetArrayLength (env, fontset);
|
423 |
|
|
fontArray = (*env)->GetLongArrayElements (env, fontset, NULL);
|
424 |
|
|
|
425 |
|
|
gdk_threads_enter();
|
426 |
|
|
|
427 |
|
|
for( i = 0; i < length; i++ )
|
428 |
|
|
{
|
429 |
|
|
font = JLONG_TO_PTR(PangoFcFont, fontArray[i]);
|
430 |
|
|
g_object_unref(font);
|
431 |
|
|
}
|
432 |
|
|
|
433 |
|
|
gdk_threads_leave();
|
434 |
|
|
|
435 |
|
|
(*env)->ReleaseLongArrayElements (env, fontset, fontArray, 0);
|
436 |
|
|
}
|
437 |
|
|
|
438 |
|
|
JNIEXPORT jlong JNICALL
|
439 |
|
|
Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getNativeFontPointer
|
440 |
|
|
(JNIEnv *env, jobject obj, jint n)
|
441 |
|
|
{
|
442 |
|
|
int i;
|
443 |
|
|
PangoFcFont *font = getFont(env, obj);
|
444 |
|
|
|
445 |
|
|
for (i = 0; i < n; i++)
|
446 |
|
|
g_object_ref(font);
|
447 |
|
|
|
448 |
|
|
return PTR_TO_JLONG(font);
|
449 |
|
|
}
|