Added TextDrawer classes
Former-commit-id: 4c5ace385f1a9b9ceebb774022bbc001b69a3bb4
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// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Utility module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_ABSTRACTTEXTDRAWER_HPP
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#define NAZARA_ABSTRACTTEXTDRAWER_HPP
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#include <Nazara/Prerequesites.hpp>
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#include <Nazara/Core/Color.hpp>
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#include <Nazara/Math/Rect.hpp>
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#include <Nazara/Math/Vector2.hpp>
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class NzAbstractImage;
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class NzFont;
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class NAZARA_API NzAbstractTextDrawer
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{
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public:
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struct Glyph;
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NzAbstractTextDrawer() = default;
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virtual ~NzAbstractTextDrawer();
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virtual const NzRectui& GetBounds() const = 0;
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virtual NzFont* GetFont(unsigned int index) const = 0;
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virtual unsigned int GetFontCount() const = 0;
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virtual const Glyph& GetGlyph(unsigned int index) const = 0;
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virtual unsigned int GetGlyphCount() const = 0;
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struct Glyph
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{
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NzColor color;
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NzRectui atlasRect;
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NzVector2f corners[4];
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NzAbstractImage* atlas;
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bool flipped;
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};
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};
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#endif // NAZARA_ABSTRACTTEXTDRAWER_HPP
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// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Utility module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_SIMPLETEXTDRAWER_HPP
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#define NAZARA_SIMPLETEXTDRAWER_HPP
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#include <Nazara/Prerequesites.hpp>
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#include <Nazara/Core/ResourceListener.hpp>
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#include <Nazara/Core/String.hpp>
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#include <Nazara/Utility/AbstractTextDrawer.hpp>
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#include <Nazara/Utility/Enums.hpp>
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#include <Nazara/Utility/Font.hpp>
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#include <vector>
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class NAZARA_API NzSimpleTextDrawer : public NzAbstractTextDrawer, NzResourceListener
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{
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public:
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NzSimpleTextDrawer();
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virtual ~NzSimpleTextDrawer();
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const NzRectui& GetBounds() const;
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unsigned int GetCharacterSize() const;
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const NzColor& GetColor() const;
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NzFont* GetFont() const;
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nzUInt32 GetStyle() const;
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void SetCharacterSize(unsigned int characterSize);
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void SetColor(const NzColor& color);
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void SetFont(NzFont* font);
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void SetStyle(nzUInt32 style);
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void SetText(const NzString& str);
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static NzSimpleTextDrawer Draw(unsigned int characterSize, const NzString& str, nzUInt32 style = nzTextStyle_Regular, const NzColor& color = NzColor::White);
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static NzSimpleTextDrawer Draw(NzFont* font, unsigned int characterSize, const NzString& str, nzUInt32 style = nzTextStyle_Regular, const NzColor& color = NzColor::White);
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private:
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NzFont* GetFont(unsigned int index) const override;
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unsigned int GetFontCount() const override;
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const Glyph& GetGlyph(unsigned int index) const override;
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unsigned int GetGlyphCount() const override;
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bool OnResourceModified(const NzResource* resource, int index, unsigned int code) override;
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void OnResourceReleased(const NzResource* resource, int index) override;
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void UpdateGlyphs() const;
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mutable std::vector<Glyph> m_glyphs;
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NzColor m_color;
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NzFontRef m_font;
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mutable NzRectui m_bounds;
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NzString m_text;
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nzUInt32 m_style;
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mutable bool m_glyphUpdated;
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unsigned int m_characterSize;
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};
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#endif // NAZARA_SIMPLETEXTDRAWER_HPP
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// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Utility module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Utility/AbstractTextDrawer.hpp>
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#include <Nazara/Utility/Debug.hpp>
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NzAbstractTextDrawer::~NzAbstractTextDrawer() = default;
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// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Utility module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Utility/SimpleTextDrawer.hpp>
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#include <memory>
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#include <Nazara/Utility/Debug.hpp>
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///TODO: Listener de font (cas où l'atlas a changé)
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NzSimpleTextDrawer::NzSimpleTextDrawer() :
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m_color(NzColor::White),
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m_style(nzTextStyle_Regular)
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{
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// SetFont(NzFont::GetDefault());
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}
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NzSimpleTextDrawer::~NzSimpleTextDrawer()
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{
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if (m_font)
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m_font->RemoveResourceListener(this);
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}
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const NzRectui& NzSimpleTextDrawer::GetBounds() const
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{
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if (!m_glyphUpdated)
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UpdateGlyphs();
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return m_bounds;
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}
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unsigned int NzSimpleTextDrawer::GetCharacterSize() const
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{
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return m_characterSize;
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}
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const NzColor& NzSimpleTextDrawer::GetColor() const
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{
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return m_color;
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}
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NzFont* NzSimpleTextDrawer::GetFont() const
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{
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return m_font;
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}
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nzUInt32 NzSimpleTextDrawer::GetStyle() const
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{
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return m_style;
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}
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void NzSimpleTextDrawer::SetCharacterSize(unsigned int characterSize)
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{
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m_characterSize = characterSize;
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m_glyphUpdated = false;
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}
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void NzSimpleTextDrawer::SetColor(const NzColor& color)
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{
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m_color = color;
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m_glyphUpdated = false;
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}
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void NzSimpleTextDrawer::SetFont(NzFont* font)
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{
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if (m_font)
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m_font->RemoveResourceListener(this);
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m_font = font;
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if (m_font)
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m_font->AddResourceListener(this);
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m_glyphUpdated = false;
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}
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void NzSimpleTextDrawer::SetStyle(nzUInt32 style)
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{
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m_style = style;
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m_glyphUpdated = false;
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}
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void NzSimpleTextDrawer::SetText(const NzString& str)
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{
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m_text = str;
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m_glyphUpdated = false;
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}
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NzSimpleTextDrawer NzSimpleTextDrawer::Draw(unsigned int characterSize, const NzString& str, nzUInt32 style, const NzColor& color)
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{
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///FIXME: Sans default font ça n'a aucun intérêt
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NzSimpleTextDrawer drawer;
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drawer.SetCharacterSize(characterSize);
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drawer.SetColor(color);
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drawer.SetStyle(style);
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drawer.SetText(str);
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return drawer;
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}
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NzSimpleTextDrawer NzSimpleTextDrawer::Draw(NzFont* font, unsigned int characterSize, const NzString& str, nzUInt32 style, const NzColor& color)
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{
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NzSimpleTextDrawer drawer;
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drawer.SetCharacterSize(characterSize);
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drawer.SetColor(color);
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drawer.SetFont(font);
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drawer.SetStyle(style);
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drawer.SetText(str);
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return drawer;
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}
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NzFont* NzSimpleTextDrawer::GetFont(unsigned int index) const
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{
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#if NAZARA_UTILITY_SAFE
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if (index > 0)
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{
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NazaraError("Font index out of range (" + NzString::Number(index) + " >= 1)");
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return nullptr;
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}
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#endif
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return m_font;
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}
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unsigned int NzSimpleTextDrawer::GetFontCount() const
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{
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return 1;
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}
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const NzAbstractTextDrawer::Glyph& NzSimpleTextDrawer::GetGlyph(unsigned int index) const
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{
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if (!m_glyphUpdated)
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UpdateGlyphs();
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return m_glyphs[index];
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}
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unsigned int NzSimpleTextDrawer::GetGlyphCount() const
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{
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if (!m_glyphUpdated)
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UpdateGlyphs();
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return m_glyphs.size();
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}
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bool NzSimpleTextDrawer::OnResourceModified(const NzResource* resource, int index, unsigned int code)
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{
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NazaraUnused(resource);
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NazaraUnused(index);
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#ifdef NAZARA_DEBUG
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if (m_font != resource)
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{
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NazaraInternalError("Not listening to " + NzString::Pointer(resource));
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return false;
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}
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#endif
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if (code == NzFont::ModificationCode_AtlasChanged ||
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code == NzFont::ModificationCode_AtlasLayerChanged ||
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code == NzFont::ModificationCode_GlyphCacheCleared)
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{
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m_glyphUpdated = false;
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}
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return true;
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}
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void NzSimpleTextDrawer::OnResourceReleased(const NzResource* resource, int index)
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{
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NazaraUnused(resource);
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NazaraUnused(index);
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#ifdef NAZARA_DEBUG
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if (m_font != resource)
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{
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NazaraInternalError("Not listening to " + NzString::Pointer(resource));
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return;
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}
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#endif
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SetFont(nullptr);
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}
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void NzSimpleTextDrawer::UpdateGlyphs() const
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{
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m_bounds.MakeZero();
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m_glyphs.clear();
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m_glyphUpdated = true;
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#if NAZARA_UTILITY_SAFE
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if (!m_font || !m_font->IsValid())
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{
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NazaraError("Invalid font");
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return;
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}
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#endif
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if (m_text.IsEmpty())
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return;
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///TODO: Itération UTF-8 => UTF-32 sans allocation de buffer (Exposer utf8cpp ?)
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unsigned int size;
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std::unique_ptr<char32_t[]> characters(m_text.GetUtf32Buffer(&size));
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if (!characters)
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{
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NazaraError("Invalid character set");
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return;
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}
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const NzFont::SizeInfo& sizeInfo = m_font->GetSizeInfo(m_characterSize);
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// "Curseur" de dessin
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NzVector2ui drawPos(0, m_characterSize);
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NzVector2ui lastPos(0, 0);
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m_glyphs.reserve(size);
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nzUInt32 previousCharacter = 0;
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for (unsigned int i = 0; i < size; ++i)
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{
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char32_t character = characters[i];
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if (previousCharacter != 0)
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drawPos.x += m_font->GetKerning(m_characterSize, previousCharacter, character);
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previousCharacter = character;
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bool whitespace = true;
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switch (character)
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{
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case ' ':
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drawPos.x += sizeInfo.spaceAdvance;
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break;
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case '\n':
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drawPos.x = 0;
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drawPos.y += sizeInfo.lineHeight;
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break;
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case '\t':
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drawPos.x += sizeInfo.spaceAdvance*4;
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break;
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default:
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whitespace = false;
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break;
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}
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if (whitespace)
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continue; // Inutile d'avoir un glyphe pour un espace blanc
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const NzFont::Glyph& fontGlyph = m_font->GetGlyph(m_characterSize, m_style, character);
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if (!fontGlyph.valid)
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continue; // Le glyphe n'a pas été correctement chargé, que pouvons-nous faire d'autre que le passer
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Glyph glyph;
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glyph.atlas = m_font->GetAtlas()->GetLayer(fontGlyph.layerIndex);
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glyph.atlasRect = fontGlyph.atlasRect;
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glyph.color = m_color;
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glyph.flipped = fontGlyph.flipped;
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float advance = fontGlyph.advance;
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NzRectf bounds(fontGlyph.aabb);
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bounds.x += drawPos.x;
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bounds.y += drawPos.y;
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if (fontGlyph.requireFauxBold)
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{
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// On va agrandir le glyphe pour simuler le gras (idée moisie, mais idée quand même)
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NzVector2f center = bounds.GetCenter();
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bounds.width *= 1.1f;
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bounds.height *= 1.1f;
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// On le replace à la bonne hauteur
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NzVector2f offset(bounds.GetCenter() - center);
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bounds.y -= offset.y;
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// On ajuste l'espacement
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advance *= 1.1f;
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}
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// On "penche" le glyphe pour obtenir un semblant d'italique
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float italic = (fontGlyph.requireFauxItalic) ? 0.208f : 0.f;
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float italicTop = italic * bounds.y;
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float italicBottom = italic * bounds.GetMaximum().y;
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glyph.corners[0].Set(bounds.x - italicTop, bounds.y);
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glyph.corners[1].Set(bounds.x + bounds.width - italicTop, bounds.y);
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glyph.corners[2].Set(bounds.x - italicBottom, bounds.y + bounds.height);
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glyph.corners[3].Set(bounds.x + bounds.width - italicBottom, bounds.y + bounds.height);
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m_glyphs.push_back(glyph);
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lastPos = drawPos;
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drawPos.x += advance;
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}
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m_bounds.ExtendTo(lastPos);
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}
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