368 lines
13 KiB
C++
368 lines
13 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGTEXT_TEXTBASE
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#define OSGTEXT_TEXTBASE 1
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#include <osg/Drawable>
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#include <osgText/String>
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#include <osgText/KerningType>
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#include <osgText/Font>
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namespace osgText {
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#define NEW_APPROACH
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class OSGTEXT_EXPORT TextBase : public osg::Drawable
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{
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public:
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TextBase();
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TextBase(const TextBase& text,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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//virtual osg::Object* cloneType() const { return new Text(); }
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//virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new Text(*this,copyop); }
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const TextBase*>(obj)!=NULL; }
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virtual const char* className() const { return "TextBase"; }
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virtual const char* libraryName() const { return "osgText"; }
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void setColor(const osg::Vec4& color);
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const osg::Vec4& getColor() const { return _color; }
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/** Set the Font to use to render the text.
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* setFont(0) sets the use of the default font.*/
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virtual void setFont(Font* font=0) { setFont(osg::ref_ptr<Font>(font)); };
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/** Set the Font to use to render the text.*/
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virtual void setFont(osg::ref_ptr<Font> font);
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/** Set the font, loaded from the specified front file, to use to render the text,
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* setFont("") sets the use of the default font.
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* See the osgText::readFontFile function for how the font file will be located. */
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virtual void setFont(const std::string& fontfile);
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/** Get the font. Return 0 if default is being used.*/
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Font* getFont() { return _font.get(); }
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/** Get the const font. Return 0 if default is being used.*/
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const Font* getFont() const { return _font.get(); }
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/** Set the text style.*/
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void setStyle(Style* style) { _style = style; }
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/** Get the text style.*/
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Style* getStyle() { return _style.get(); }
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/** Get the const text style.*/
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const Style* getStyle() const { return _style.get(); }
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/** Get or create the text style.*/
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Style* getOrCreateStyle() { if (!_style) _style = new Style; return _style.get(); }
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/** Set the Font reference width and height resolution in texels.
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* Note, the size may not be supported by current font,
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* the closest supported font size will be selected.*/
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void setFontResolution(unsigned int width, unsigned int height);
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unsigned int getFontWidth() const { return _fontSize.first; }
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unsigned int getFontHeight() const { return _fontSize.second; }
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/** Set the text using a osgText::String.*/
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void setText(const String& text);
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/** Set the text using a std::string,
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* which is converted to an internal TextString.*/
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void setText(const std::string& text);
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/** Set the text using a Unicode encoded std::string, which is converted to an internal TextString.
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* The encoding parameter specificies which Unicode encodeding is used in the std::string. */
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void setText(const std::string& text,String::Encoding encoding);
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/** Set the text using a wchar_t string,
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* which is converted to an internal TextString.*/
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void setText(const wchar_t* text);
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/** Get the text string.
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* Note, if you modify the string you must call Text::update() for
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* the internal glyph reprentation to be updated.*/
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String& getText() { return _text; }
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/** Get the const text string.*/
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const String& getText() const { return _text; }
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/** update internal glyph respresentation used for rendering,
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* and bounding volume.*/
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void update() { computeGlyphRepresentation(); }
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/** Set the rendered character size in object coordinates.*/
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void setCharacterSize(float height);
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/** Set the rendered character size in object coordinates.*/
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void setCharacterSize(float height, float aspectRatio);
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float getCharacterHeight() const { return _characterHeight; }
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float getCharacterAspectRatio() const { return _style.valid()? _style->getWidthRatio() : 1.0f; }
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enum CharacterSizeMode
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{
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OBJECT_COORDS, /// default
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SCREEN_COORDS, /// internally scale the characters to be constant screen size.
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OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT /// text that behavaves like OBJECT_COORDS sized text when a long distance way, but has its screen sized capped automatically when the viewer gets near.
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};
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/** Set how the CharacterSize value relates to the final rendered character.*/
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void setCharacterSizeMode(CharacterSizeMode mode) { _characterSizeMode = mode; }
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/** Get the CharacterSizeMode.*/
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CharacterSizeMode getCharacterSizeMode() const { return _characterSizeMode; }
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/** Set the maximum width of the text box.
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* With horizontal layouts any characters which do not fit are wrapped around.
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* 0 or negative values indicate that no maximum width is set, lines can be as long as
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* they need be to fit thre required text*/
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void setMaximumWidth(float maximumWidth);
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/** Get the maximim width of the text box.*/
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float getMaximumWidth() const { return _maximumWidth; }
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/** Set the maximum height of the text box.
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* With horizontal layouts any characters which do not fit are wrapped around.
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* 0 or negative values indicate that no maximum height is set, lines can be as long as
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* they need be to fit the required text*/
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void setMaximumHeight(float maximumHeight);
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/** Get the maximum height of the text box.*/
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float getMaximumHeight() const { return _maximumHeight; }
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/** Set the line spacing of the text box, given as a percentage of
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* the character height. The default value is 0 for backward
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* compatibility. For longer paragraphs of text, a value of at
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* least 25% (i.e. set line spacing to 0.25) is recommended. */
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void setLineSpacing(float lineSpacing);
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/** Get the line spacing of the text box. */
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float getLineSpacing() const { return _lineSpacing; }
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/** Set the position of text.*/
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void setPosition(const osg::Vec3& pos);
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/** Get the position of text.*/
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const osg::Vec3& getPosition() const { return _position; }
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enum AlignmentType
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{
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LEFT_TOP,
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LEFT_CENTER,
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LEFT_BOTTOM,
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CENTER_TOP,
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CENTER_CENTER,
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CENTER_BOTTOM,
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RIGHT_TOP,
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RIGHT_CENTER,
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RIGHT_BOTTOM,
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LEFT_BASE_LINE,
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CENTER_BASE_LINE,
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RIGHT_BASE_LINE,
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LEFT_BOTTOM_BASE_LINE,
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CENTER_BOTTOM_BASE_LINE,
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RIGHT_BOTTOM_BASE_LINE,
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BASE_LINE = LEFT_BASE_LINE /// default.
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};
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void setAlignment(AlignmentType alignment);
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AlignmentType getAlignment() const { return _alignment; }
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enum AxisAlignment
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{
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XY_PLANE,
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REVERSED_XY_PLANE,
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XZ_PLANE,
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REVERSED_XZ_PLANE,
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YZ_PLANE,
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REVERSED_YZ_PLANE,
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SCREEN,
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USER_DEFINED_ROTATION
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};
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void setAxisAlignment(AxisAlignment axis);
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AxisAlignment getAxisAlignment() const { return _axisAlignment; }
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void setRotation(const osg::Quat& quat);
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const osg::Quat& getRotation() const { return _rotation; }
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void setAutoRotateToScreen(bool autoRotateToScreen);
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bool getAutoRotateToScreen() const { return _autoRotateToScreen; }
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enum Layout
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{
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LEFT_TO_RIGHT, /// default
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RIGHT_TO_LEFT,
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VERTICAL
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};
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void setLayout(Layout layout);
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Layout getLayout() const { return _layout; }
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enum DrawModeMask
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{
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TEXT = 1, /// default
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BOUNDINGBOX = 2,
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FILLEDBOUNDINGBOX = 4,
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ALIGNMENT = 8
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};
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void setDrawMode(unsigned int mode);
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unsigned int getDrawMode() const { return _drawMode; }
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void setBoundingBoxMargin(float margin);
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float getBoundingBoxMargin() const { return _textBBMargin; }
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void setBoundingBoxColor(const osg::Vec4& color){ _textBBColor = color; }
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const osg::Vec4& getBoundingBoxColor() const { return _textBBColor; }
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void setKerningType(KerningType kerningType) { _kerningType = kerningType; }
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KerningType getKerningType() const { return _kerningType; }
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/** Get the number of wrapped lines - only valid after computeGlyphRepresentation() has been called, returns 0 otherwise */
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unsigned int getLineCount() const { return _lineCount; }
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/** Immediately compile this \c Drawable into an OpenGL Display List/VertexBufferObjects.
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* @note Operation is ignored if \c _useDisplayList is \c false or VertexBufferObjects are not used.
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*/
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virtual void compileGLObjects(osg::RenderInfo& renderInfo) const;
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/** Resize any per context GLObject buffers to specified size. */
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virtual void resizeGLObjectBuffers(unsigned int maxSize);
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/** If State is non-zero, this function releases OpenGL objects for
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* the specified graphics context. Otherwise, releases OpenGL objexts
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* for all graphics contexts. */
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virtual void releaseGLObjects(osg::State* state=0) const;
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virtual osg::BoundingBox computeBoundingBox() const;
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typedef osg::ref_ptr<osg::Vec3Array> Coords;
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Coords& getCoords() { return _coords; }
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const Coords& getCoords() const { return _coords; }
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void getCoord(unsigned int i, osg::Vec2& c) const { c.set((*_coords)[i].x(), (*_coords)[i].y()); }
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void getCoord(unsigned int i, osg::Vec3& c) const { c = (*_coords)[i]; }
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/** Get the cached internal matrix used to provide positioning of text. The cached matrix is originally computed by computeMatrix(..). */
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const osg::Matrix& getMatrix() const { return _matrix; }
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/** compute the matrix that positions the text in model space for the given viewpoint.*/
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bool computeMatrix(osg::Matrix& matrix, osg::State* state=0) const;
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protected:
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virtual ~TextBase();
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virtual osg::StateSet* createStateSet();
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virtual void assignStateSet();
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void initArraysAndBuffers();
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osg::VertexArrayState* createVertexArrayStateImplementation(osg::RenderInfo& renderInfo) const;
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void positionCursor(const osg::Vec2 & endOfLine_coords, osg::Vec2 & cursor, unsigned int linelength);
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String::iterator computeLastCharacterOnLine(osg::Vec2& cursor, String::iterator first,String::iterator last);
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void computePositions();
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virtual void computePositionsImplementation();
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virtual void computeGlyphRepresentation() = 0;
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typedef osg::ref_ptr<osg::Vec2Array> TexCoords;
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typedef osg::ref_ptr<osg::Vec4Array> ColorCoords;
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typedef std::vector< osg::ref_ptr<osg::DrawElements> > Primitives;
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// members which have public access.
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osg::Vec4 _color;
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osg::ref_ptr<Font> _font;
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osg::ref_ptr<Style> _style;
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FontResolution _fontSize;
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float _characterHeight;
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CharacterSizeMode _characterSizeMode;
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float _maximumWidth;
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float _maximumHeight;
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float _lineSpacing;
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String _text;
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osg::Vec3 _position;
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AlignmentType _alignment;
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AxisAlignment _axisAlignment;
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osg::Quat _rotation;
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bool _autoRotateToScreen;
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Layout _layout;
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unsigned int _drawMode;
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float _textBBMargin;
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osg::Vec4 _textBBColor;
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KerningType _kerningType;
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unsigned int _lineCount;
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bool _glyphNormalized;
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osg::Vec3 _offset;
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osg::Vec3 _normal;
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osg::BoundingBox _textBB;
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mutable osg::Matrix _matrix;
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Primitives _decorationPrimitives;
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void setupDecoration();
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osg::ref_ptr<osg::VertexBufferObject> _vbo;
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osg::ref_ptr<osg::ElementBufferObject> _ebo;
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Coords _coords;
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Coords _normals;
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ColorCoords _colorCoords;
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TexCoords _texcoords;
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unsigned int addCoord(const osg::Vec2& c) { unsigned int s = _coords->size(); _coords->push_back(osg::Vec3(c.x(), c.y(), 0.0f)); _coords->dirty(); return s; }
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unsigned int addCoord(const osg::Vec3& c) { unsigned int s = _coords->size(); _coords->push_back(c); _coords->dirty(); return s; }
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void addTexCoord(const osg::Vec2& tc) { _texcoords->push_back(tc); _texcoords->dirty(); }
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};
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}
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#endif
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