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jeremybenn |
/* Copyright (C) 2000, 2003 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <X11/Xlib.h>
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#include <gcj/cni.h>
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#include <gnu/gcj/RawData.h>
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#include <java/lang/String.h>
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#include <gnu/gcj/xlib/Display.h>
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#include <gnu/gcj/xlib/Font.h>
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#include <gnu/gcj/xlib/XException.h>
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gnu::gcj::RawData* gnu::gcj::xlib::Font::loadFontImpl(Display* display,
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jstring lfdNamePattern)
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{
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::Display* dpy = (::Display*) display->display;
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int len = JvGetStringUTFLength(lfdNamePattern);
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char cName[len+1];
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JvGetStringUTFRegion(lfdNamePattern, 0, lfdNamePattern->length(),
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cName);
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cName[len] = '\0';
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XFontStruct* fontStruct = XLoadQueryFont(dpy, cName);
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if (fontStruct == 0)
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{
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throw new XException(JvNewStringLatin1("font not found"));
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}
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return reinterpret_cast<gnu::gcj::RawData*>(fontStruct);
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}
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jint gnu::gcj::xlib::Font::getXIDFromStruct(gnu::gcj::RawData* structure)
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{
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XFontStruct* fontStruct = (XFontStruct*) structure;
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return fontStruct->fid;
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}
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jint gnu::gcj::xlib::Font::getMaxAscent()
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{
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XFontStruct* fontStruct = (XFontStruct*) structure;
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return fontStruct->max_bounds.ascent+1; // +1 to include the baseline
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}
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jint gnu::gcj::xlib::Font::getMaxDescent()
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{
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XFontStruct* fontStruct = (XFontStruct*) structure;
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return fontStruct->max_bounds.descent-1; // -1 to exclude the baseline
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}
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jint gnu::gcj::xlib::Font::getAscent()
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{
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XFontStruct* fontStruct = (XFontStruct*) structure;
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jint returnValue = fontStruct->ascent;
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if (fontStruct->min_byte1==0 && fontStruct->min_char_or_byte2<=(unsigned)'O')
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returnValue = fontStruct
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->per_char[(unsigned)'O'-fontStruct->min_char_or_byte2]
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.ascent;
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return returnValue+1; // +1 to include the baseline
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}
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jint gnu::gcj::xlib::Font::getDescent()
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{
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XFontStruct* fontStruct = (XFontStruct*) structure;
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jint returnValue = fontStruct->descent;
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if (fontStruct->min_byte1==0 && fontStruct->min_char_or_byte2<=(unsigned)'y')
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returnValue = fontStruct
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->per_char[(unsigned)'y'-fontStruct->min_char_or_byte2]
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.descent;
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return returnValue-1; // -1 to exclude the baseline
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}
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jint gnu::gcj::xlib::Font::getStringWidth(::java::lang::String* text)
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{
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XFontStruct* fontStruct = (XFontStruct*) structure;
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// FIXME: Convert to the character set used in the font, which may
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// or may not be unicode. For now, treat everything as 16-bit and
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// use character codes directly, which should be OK for unicode or
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// 8-bit ascii fonts.
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jint length = text->length();
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jchar* txt = JvGetStringChars(text);
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XChar2b xwchars[length];
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for (int i=0; i<length; i++)
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{
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XChar2b* xc = &(xwchars[i]);
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jchar jc = txt[i];
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xc->byte1 = (jc >> 8) & 0xff;
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xc->byte2 = jc & 0xff;
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}
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return XTextWidth16(fontStruct, xwchars, length);
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}
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void gnu::gcj::xlib::Font::finalize()
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{
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if (structure != 0)
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{
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::Display* dpy = (::Display*) display->display;
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XFontStruct* fontStruct = (XFontStruct*) structure;
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int result = XFreeFont(dpy, fontStruct);
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if (result == BadFont)
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throw new XException(display, result);
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structure = 0; xid = 0;
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}
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}
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