[共通] DrawableText::fits() #1202

Siv3D · Jul 2, 2024 · a46d190 · a46d190
1 parent 236a48c
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diff --git a/Siv3D/include/Siv3D/DrawableText.hpp b/Siv3D/include/Siv3D/DrawableText.hpp
@@ -168,6 +168,10 @@ namespace s3d
 		[[nodiscard]]
 		RectF regionBaseAt(double size, Vec2 pos = Vec2{ 0, 0 }) const;
 
+		bool fits(const RectF& area) const;
+
+		bool fits(double size, const RectF& area) const;
+
 		RectF draw(double x, double y, const ColorF& color = Palette::White) const;
 
 		RectF draw(const Vec2& pos = Vec2{ 0, 0 }, const ColorF& color = Palette::White) const;

diff --git a/Siv3D/src/Siv3D/DrawableText/SivDrawableText.cpp b/Siv3D/src/Siv3D/DrawableText/SivDrawableText.cpp
@@ -330,6 +330,16 @@ namespace s3d
 		return rect.movedBy(pos.x - (rect.w * 0.5), pos.y);
 	}
 
+	bool DrawableText::fits(const RectF& area) const
+	{
+		return fits(font.fontSize(), area);
+	}
+
+	bool DrawableText::fits(const double size, const RectF& area) const
+	{
+		return SIV3D_ENGINE(Font)->fits(font.id(), text, clusters, area, size, 1.0);
+	}
+
 	RectF DrawableText::draw(const double x, const double y, const ColorF& color) const
 	{
 		return draw(TextStyle::Default(), font.fontSize(), Vec2{x, y}, color);

diff --git a/Siv3D/src/Siv3D/Font/CFont.cpp b/Siv3D/src/Siv3D/Font/CFont.cpp
@@ -441,6 +441,13 @@ namespace s3d
 		}
 	}
 
+	bool CFont::fits(const Font::IDType handleID, const StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double fontSize, const double lineHeightScale)
+	{
+		const auto& font = m_fonts[handleID];
+
+		return m_fonts[handleID]->getGlyphCache().fits(*font, s, clusters, area, fontSize, lineHeightScale);
+	}
+
 	bool CFont::draw(const Font::IDType handleID, const StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double fontSize, const TextStyle& textStyle, const ColorF& color, const double lineHeightScale)
 	{
 		const auto& font = m_fonts[handleID];

diff --git a/Siv3D/src/Siv3D/Font/CFont.hpp b/Siv3D/src/Siv3D/Font/CFont.hpp
@@ -121,6 +121,8 @@ namespace s3d
 
 		RectF draw(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const Vec2& pos, double fontSize, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) override;
 
+		bool fits(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double fontSize, double lineHeightScale);
+
 		bool draw(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double fontSize, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) override;
 
 		RectF drawBase(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const Vec2& pos, double fontSize, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) override;

diff --git a/Siv3D/src/Siv3D/Font/CFont_Headless.cpp b/Siv3D/src/Siv3D/Font/CFont_Headless.cpp
@@ -334,6 +334,12 @@ namespace s3d
 		}
 	}
 
+	bool CFont_Headless::fits(const Font::IDType, const StringView, const Array<GlyphCluster>&, const RectF&, const double, const double)
+	{
+		// [Siv3D ToDo]
+		return false;
+	}
+
 	bool CFont_Headless::draw(const Font::IDType, const StringView, const Array<GlyphCluster>&, const RectF&, const double, const TextStyle&, const ColorF&, const double)
 	{
 		// [Siv3D ToDo]

diff --git a/Siv3D/src/Siv3D/Font/CFont_Headless.hpp b/Siv3D/src/Siv3D/Font/CFont_Headless.hpp
@@ -101,6 +101,8 @@ namespace s3d
 
 		RectF draw(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const Vec2& pos, double fontSize, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) override;
 
+		bool fits(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double fontSize, double lineHeightScale);
+
 		bool draw(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double fontSize, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) override;
 
 		RectF drawBase(Font::IDType handleID, StringView s, const Array<GlyphCluster>& clusters, const Vec2& pos, double fontSize, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) override;

diff --git a/Siv3D/src/Siv3D/Font/GlyphCache/BitmapGlyphCache.cpp b/Siv3D/src/Siv3D/Font/GlyphCache/BitmapGlyphCache.cpp
@@ -91,6 +91,120 @@ namespace s3d
 		return{ topLeft, (xMax - basePos.x), (lineCount * prop.height() * scale * lineHeightScale) };
 	}
 
+	bool BitmapGlyphCache::fits(const FontData& font, const StringView s, const Array<GlyphCluster>& clusters, const RectF& area, const double size, const double lineHeightScale)
+	{
+		if (not prerender(font, clusters, true))
+		{
+			return false;
+		}
+
+		// 「.」のグリフ
+		const Array<GlyphCluster> dotGlyphCluster = font.getGlyphClusters(U".", false, Ligature::Yes);
+		if (not prerender(font, dotGlyphCluster, true))
+		{
+			// do tnohing
+		}
+		updateTexture();
+
+		const double dotXAdvance = m_glyphTable.find(dotGlyphCluster[0].glyphIndex)->second.info.xAdvance;
+		const Vec2 areaBottomRight = area.br();
+
+		const auto& prop = font.getProperty();
+		const double scale = (size / prop.fontPixelSize);
+		const double lineHeight = (prop.height() * scale * lineHeightScale);
+
+		if ((area.w < (dotXAdvance * 3)) || (area.h < lineHeight))
+		{
+			return false;
+		}
+
+		const int32 maxLines = Max(static_cast<int32>(area.h / (lineHeight ? lineHeight : 1)), 1);
+		const Vec2 basePos{ area.pos };
+
+		Array<Vec2> penPositions;
+		size_t clusterIndex = 0;
+		{
+			Array<double> xAdvances(Arg::reserve = clusters.size());
+			Vec2 penPos{ basePos };
+			int32 lineIndex = 0;
+			double currentLineWidth = 0.0;
+			double previousLineWidth = 0.0;
+
+			for (; clusterIndex < clusters.size(); ++clusterIndex)
+			{
+				const auto& cluster = clusters[clusterIndex];
+				double xAdvance = 0.0;
+				bool nextLine = false;
+
+				if (const char32 ch = s[cluster.pos];
+					IsControl(ch))
+				{
+					if (ch == U'\t')
+					{
+						xAdvance = GetTabAdvance(prop.spaceWidth, scale, basePos.x, penPos.x, prop.indentSize);
+					}
+					else
+					{
+						xAdvance = 0.0;
+						nextLine = (ch == U'\n');
+					}
+				}
+				else if (cluster.fontIndex != 0)
+				{
+					const size_t fallbackIndex = (cluster.fontIndex - 1);
+					xAdvance = SIV3D_ENGINE(Font)->regionBaseFallback(font.getFallbackFont(fallbackIndex).lock()->id(),
+						cluster, penPos.movedBy(0, prop.ascender * scale), size, lineHeightScale).w;
+				}
+				else
+				{
+					const auto& cache = m_glyphTable.find(cluster.glyphIndex)->second;
+					xAdvance = (cache.info.xAdvance * scale);
+				}
+
+				if (areaBottomRight.x < (penPos.x + xAdvance))
+				{
+					nextLine = true;
+				}
+
+				if (nextLine)
+				{
+					++lineIndex;
+					previousLineWidth = currentLineWidth;
+
+					penPos.x = basePos.x;
+					penPos.y = basePos.y + (lineIndex * lineHeight);
+				}
+
+				penPositions << penPos;
+				xAdvances << xAdvance;
+				penPos.x += xAdvance;
+				currentLineWidth = (penPos.x - basePos.x);
+
+				// エリア外
+				if (maxLines <= lineIndex)
+				{
+					const double dotsWidth = (dotXAdvance * 3);
+					double xEliminatedWidth = (area.w - previousLineWidth);
+
+					while (clusterIndex > 0)
+					{
+						xEliminatedWidth += xAdvances[clusterIndex];
+						--clusterIndex;
+
+						if (dotsWidth <= xEliminatedWidth)
+						{
+							break;
+						}
+					}
+
+					break;
+				}
+			}
+		}
+
+		return (clusterIndex == clusters.size());
+	}
+
 	bool BitmapGlyphCache::draw(const FontData& font, const StringView s, const Array<GlyphCluster>& clusters, const RectF& area, const double size, const TextStyle& textStyle, const ColorF& color, const double lineHeightScale)
 	{
 		if (not prerender(font, clusters, true))

diff --git a/Siv3D/src/Siv3D/Font/GlyphCache/BitmapGlyphCache.hpp b/Siv3D/src/Siv3D/Font/GlyphCache/BitmapGlyphCache.hpp
@@ -26,6 +26,8 @@ namespace s3d
 
 		RectF draw(const FontData & font, StringView s, const Array<GlyphCluster>&clusters, bool usebasePos, const Vec2 & pos, double size, const TextStyle & textStyle, const ColorF & color, double lineHeightScale) override;
 
+		bool fits(const FontData& font, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double size, double lineHeightScale);
+
 		bool draw(const FontData & font, StringView s, const Array<GlyphCluster>&clusters, const RectF & area, double size, const TextStyle & textStyle, const ColorF & color, double lineHeightScale) override;
 
 		[[nodiscard]]

diff --git a/Siv3D/src/Siv3D/Font/GlyphCache/IGlyphCache.hpp b/Siv3D/src/Siv3D/Font/GlyphCache/IGlyphCache.hpp
@@ -26,6 +26,8 @@ namespace s3d
 
 		virtual RectF draw(const FontData& font, StringView s, const Array<GlyphCluster>& clusters, bool useBasePos, const Vec2& pos, double size, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) = 0;
 
+		virtual bool fits(const FontData& font, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double size, double lineHeightScale) = 0;
+
 		virtual bool draw(const FontData& font, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double size, const TextStyle& textStyle, const ColorF& color, double lineHeightScale) = 0;
 
 		virtual RectF drawFallback(const FontData& font, const GlyphCluster& cluster, bool useBasePos, const Vec2& pos, const double size, const ColorF& color, double lineHeightScale) = 0;

diff --git a/Siv3D/src/Siv3D/Font/GlyphCache/MSDFGlyphCache.cpp b/Siv3D/src/Siv3D/Font/GlyphCache/MSDFGlyphCache.cpp
@@ -90,6 +90,120 @@ namespace s3d
 		return{ topLeft, (xMax - basePos.x), (lineCount * prop.height() * scale * lineHeightScale) };
 	}
 
+	bool MSDFGlyphCache::fits(const FontData& font, const StringView s, const Array<GlyphCluster>& clusters, const RectF& area, const double size, const double lineHeightScale)
+	{
+		if (not prerender(font, clusters, true))
+		{
+			return false;
+		}
+
+		// 「.」のグリフ
+		const Array<GlyphCluster> dotGlyphCluster = font.getGlyphClusters(U".", false, Ligature::Yes);
+		if (not prerender(font, dotGlyphCluster, true))
+		{
+			// do tnohing
+		}
+		updateTexture();
+
+		const double dotXAdvance = m_glyphTable.find(dotGlyphCluster[0].glyphIndex)->second.info.xAdvance;
+		const Vec2 areaBottomRight = area.br();
+
+		const auto& prop = font.getProperty();
+		const double scale = (size / prop.fontPixelSize);
+		const double lineHeight = (prop.height() * scale * lineHeightScale);
+
+		if ((area.w < (dotXAdvance * 3)) || (area.h < lineHeight))
+		{
+			return false;
+		}
+
+		const int32 maxLines = Max(static_cast<int32>(area.h / (lineHeight ? lineHeight : 1)), 1);
+		const Vec2 basePos{ area.pos };
+
+		Array<Vec2> penPositions;
+		size_t clusterIndex = 0;
+		{
+			Array<double> xAdvances(Arg::reserve = clusters.size());
+			Vec2 penPos{ basePos };
+			int32 lineIndex = 0;
+			double currentLineWidth = 0.0;
+			double previousLineWidth = 0.0;
+
+			for (; clusterIndex < clusters.size(); ++clusterIndex)
+			{
+				const auto& cluster = clusters[clusterIndex];
+				double xAdvance = 0.0;
+				bool nextLine = false;
+
+				if (const char32 ch = s[cluster.pos];
+					IsControl(ch))
+				{
+					if (ch == U'\t')
+					{
+						xAdvance = GetTabAdvance(prop.spaceWidth, scale, basePos.x, penPos.x, prop.indentSize);
+					}
+					else
+					{
+						xAdvance = 0.0;
+						nextLine = (ch == U'\n');
+					}
+				}
+				else if (cluster.fontIndex != 0)
+				{
+					const size_t fallbackIndex = (cluster.fontIndex - 1);
+					xAdvance = SIV3D_ENGINE(Font)->regionBaseFallback(font.getFallbackFont(fallbackIndex).lock()->id(),
+						cluster, penPos.movedBy(0, prop.ascender * scale), size, lineHeightScale).w;
+				}
+				else
+				{
+					const auto& cache = m_glyphTable.find(cluster.glyphIndex)->second;
+					xAdvance = (cache.info.xAdvance * scale);
+				}
+
+				if (areaBottomRight.x < (penPos.x + xAdvance))
+				{
+					nextLine = true;
+				}
+
+				if (nextLine)
+				{
+					++lineIndex;
+					previousLineWidth = currentLineWidth;
+
+					penPos.x = basePos.x;
+					penPos.y = basePos.y + (lineIndex * lineHeight);
+				}
+
+				penPositions << penPos;
+				xAdvances << xAdvance;
+				penPos.x += xAdvance;
+				currentLineWidth = (penPos.x - basePos.x);
+
+				// エリア外
+				if (maxLines <= lineIndex)
+				{
+					const double dotsWidth = (dotXAdvance * 3);
+					double xEliminatedWidth = (area.w - previousLineWidth);
+
+					while (clusterIndex > 0)
+					{
+						xEliminatedWidth += xAdvances[clusterIndex];
+						--clusterIndex;
+
+						if (dotsWidth <= xEliminatedWidth)
+						{
+							break;
+						}
+					}
+
+					break;
+				}
+			}
+		}
+
+		return (clusterIndex == clusters.size());
+	}
+
 	bool MSDFGlyphCache::draw(const FontData& font, const StringView s, const Array<GlyphCluster>& clusters, const RectF& area, const double size, const TextStyle& textStyle, const ColorF& color, const double lineHeightScale)
 	{
 		if (not prerender(font, clusters, true))

diff --git a/Siv3D/src/Siv3D/Font/GlyphCache/MSDFGlyphCache.hpp b/Siv3D/src/Siv3D/Font/GlyphCache/MSDFGlyphCache.hpp
@@ -26,6 +26,8 @@ namespace s3d
 
 		RectF draw(const FontData & font, StringView s, const Array<GlyphCluster>&clusters, bool usebasePos, const Vec2 & pos, double size, const TextStyle & textStyle, const ColorF & color, double lineHeightScale) override;
 
+		bool fits(const FontData& font, StringView s, const Array<GlyphCluster>& clusters, const RectF& area, double size, double lineHeightScale);
+
 		bool draw(const FontData & font, StringView s, const Array<GlyphCluster>&clusters, const RectF & area, double size, const TextStyle & textStyle, const ColorF & color, double lineHeightScale) override;
 
 		[[nodiscard]]