/Mantis/GRAPHICS/Gui/inc/cegui/src/CEGUIFont.cpp
C++ | 282 lines | 182 code | 45 blank | 55 comment | 25 complexity | 51fb7377eb3ce94de1ee6d1e9fd35b30 MD5 | raw file
- /***********************************************************************
- filename: CEGUIFont.cpp
- created: 21/2/2004
- author: Paul D Turner <paul@cegui.org.uk>
- *************************************************************************/
- /***************************************************************************
- * Copyright (C) 2004 - 2009 Paul D Turner & The CEGUI Development Team
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- ***************************************************************************/
- #include "CEGUIFont.h"
- #include "CEGUIExceptions.h"
- #include "CEGUIFont_xmlHandler.h"
- #include "CEGUIPropertyHelper.h"
- namespace CEGUI
- {
- //----------------------------------------------------------------------------//
- // amount of bits in a uint
- #define BITS_PER_UINT (sizeof (uint) * 8)
- // must be a power of two
- #define GLYPHS_PER_PAGE 256
- //----------------------------------------------------------------------------//
- const argb_t Font::DefaultColour = 0xFFFFFFFF;
- String Font::d_defaultResourceGroup;
- //----------------------------------------------------------------------------//
- Font::Font(const String& name, const String& type_name, const String& filename,
- const String& resource_group, const bool auto_scaled,
- const float native_horz_res, const float native_vert_res) :
- d_name(name),
- d_type(type_name),
- d_filename(filename),
- d_resourceGroup(resource_group),
- d_ascender(0),
- d_descender(0),
- d_height(0),
- d_autoScale(auto_scaled),
- d_nativeHorzRes(native_horz_res),
- d_nativeVertRes(native_vert_res),
- d_maxCodepoint(0),
- d_glyphPageLoaded(0)
- {
- addFontProperties();
- const Size size(System::getSingleton().getRenderer()->getDisplaySize());
- d_horzScaling = size.d_width / d_nativeHorzRes;
- d_vertScaling = size.d_height / d_nativeVertRes;
- }
- //----------------------------------------------------------------------------//
- Font::~Font()
- {
- delete[] d_glyphPageLoaded;
- }
- //----------------------------------------------------------------------------//
- const String& Font::getName() const
- {
- return d_name;
- }
- //----------------------------------------------------------------------------//
- const String& Font::getTypeName() const
- {
- return d_type;
- }
- //----------------------------------------------------------------------------//
- void Font::setMaxCodepoint(utf32 codepoint)
- {
- d_maxCodepoint = codepoint;
- delete[] d_glyphPageLoaded;
- uint npages = (codepoint + GLYPHS_PER_PAGE) / GLYPHS_PER_PAGE;
- uint size = (npages + BITS_PER_UINT - 1) / BITS_PER_UINT;
- d_glyphPageLoaded = new uint[size];
- memset(d_glyphPageLoaded, 0, size * sizeof(uint));
- }
- //----------------------------------------------------------------------------//
- const FontGlyph* Font::getGlyphData(utf32 codepoint) const
- {
- if (codepoint > d_maxCodepoint)
- return 0;
- if (d_glyphPageLoaded)
- {
- // Check if glyph page has been rasterised
- uint page = codepoint / GLYPHS_PER_PAGE;
- uint mask = 1 << (page & (BITS_PER_UINT - 1));
- if (!(d_glyphPageLoaded[page / BITS_PER_UINT] & mask))
- {
- d_glyphPageLoaded[page / BITS_PER_UINT] |= mask;
- rasterise(codepoint & ~(GLYPHS_PER_PAGE - 1),
- codepoint | (GLYPHS_PER_PAGE - 1));
- }
- }
- CodepointMap::const_iterator pos = d_cp_map.find(codepoint);
- return (pos != d_cp_map.end()) ? &pos->second : 0;
- }
- //----------------------------------------------------------------------------//
- float Font::getTextExtent(const String& text, float x_scale) const
- {
- const FontGlyph* glyph;
- float cur_extent = 0, adv_extent = 0, width;
- for (size_t c = 0; c < text.length(); ++c)
- {
- glyph = getGlyphData(text[c]);
- if (glyph)
- {
- width = glyph->getRenderedAdvance(x_scale);
- if (adv_extent + width > cur_extent)
- cur_extent = adv_extent + width;
- adv_extent += glyph->getAdvance(x_scale);
- }
- }
- return ceguimax(adv_extent, cur_extent);
- }
- //----------------------------------------------------------------------------//
- size_t Font::getCharAtPixel(const String& text, size_t start_char, float pixel,
- float x_scale) const
- {
- const FontGlyph* glyph;
- float cur_extent = 0;
- size_t char_count = text.length();
- // handle simple cases
- if ((pixel <= 0) || (char_count <= start_char))
- return start_char;
- for (size_t c = start_char; c < char_count; ++c)
- {
- glyph = getGlyphData(text[c]);
- if (glyph)
- {
- cur_extent += glyph->getAdvance(x_scale);
- if (pixel < cur_extent)
- return c;
- }
- }
- return char_count;
- }
- //----------------------------------------------------------------------------//
- void Font::drawText(GeometryBuffer& buffer, const String& text,
- const Vector2& position, const Rect* clip_rect,
- const ColourRect& colours, const float space_extra,
- const float x_scale, const float y_scale)
- {
- const float base_y = position.d_y + getBaseline(y_scale);
- Vector2 glyph_pos(position);
- for (size_t c = 0; c < text.length(); ++c)
- {
- const FontGlyph* glyph;
- if ((glyph = getGlyphData(text[c]))) // NB: assignment
- {
- const Image* const img = glyph->getImage();
- glyph_pos.d_y =
- base_y - (img->getOffsetY() - img->getOffsetY() * y_scale);
- img->draw(buffer, glyph_pos,
- glyph->getSize(x_scale, y_scale), clip_rect, colours);
- glyph_pos.d_x += glyph->getAdvance(x_scale);
- // apply extra spacing to space chars
- if (text[c] == ' ')
- glyph_pos.d_x += space_extra;
- }
- }
- }
- //----------------------------------------------------------------------------//
- void Font::setNativeResolution(const Size& size)
- {
- d_nativeHorzRes = size.d_width;
- d_nativeVertRes = size.d_height;
- // re-calculate scaling factors & notify images as required
- notifyDisplaySizeChanged(
- System::getSingleton().getRenderer()->getDisplaySize());
- }
- //----------------------------------------------------------------------------//
- Size Font::getNativeResolution() const
- {
- return Size(d_nativeHorzRes, d_nativeVertRes);
- }
- //----------------------------------------------------------------------------//
- void Font::setAutoScaled(const bool auto_scaled)
- {
- if (auto_scaled == d_autoScale)
- return;
- d_autoScale = auto_scaled;
- updateFont();
- }
- //----------------------------------------------------------------------------//
- bool Font::isAutoScaled() const
- {
- return d_autoScale;
- }
- //----------------------------------------------------------------------------//
- void Font::notifyDisplaySizeChanged(const Size& size)
- {
- d_horzScaling = size.d_width / d_nativeHorzRes;
- d_vertScaling = size.d_height / d_nativeVertRes;
- if (d_autoScale)
- updateFont();
- }
- //----------------------------------------------------------------------------//
- void Font::rasterise(utf32, utf32) const
- {
- // do nothing by default
- }
- //----------------------------------------------------------------------------//
- void Font::writeXMLToStream(XMLSerializer& xml_stream) const
- {
- // output starting <Font ... > element
- xml_stream.openTag("Font")
- .attribute(Font_xmlHandler::FontNameAttribute, d_name)
- .attribute(Font_xmlHandler::FontFilenameAttribute, d_filename);
- if (!d_resourceGroup.empty())
- xml_stream.attribute(Font_xmlHandler::FontResourceGroupAttribute,
- d_resourceGroup);
- if (d_nativeHorzRes != DefaultNativeHorzRes)
- xml_stream.attribute(Font_xmlHandler::FontNativeHorzResAttribute,
- PropertyHelper::uintToString(static_cast<uint>(d_nativeHorzRes)));
- if (d_nativeVertRes != DefaultNativeVertRes)
- xml_stream.attribute(Font_xmlHandler::FontNativeVertResAttribute,
- PropertyHelper::uintToString(static_cast<uint>(d_nativeVertRes)));
- if (d_autoScale)
- xml_stream.attribute(Font_xmlHandler::FontAutoScaledAttribute, "True");
- writeXMLToStream_impl(xml_stream);
- // output closing </Font> element.
- xml_stream.closeTag();
- }
- //----------------------------------------------------------------------------//
- } // End of CEGUI namespace section