Add Text rendering

- Add FreeType as dependency - Add MsdfGen as dependency - Add MsdfAtlasGen as dependency
2023-05-08 22:12:19 +02:00
parent ad69293faa
commit 4e466a1fce
190 changed files with 44693 additions and 46 deletions
@@ -0,0 +1,79 @@
+
+#pragma once
+
+#include <msdfgen.h>
+#include <msdfgen-ext.h>
+#include "types.h"
+#include "Rectangle.h"
+#include "GlyphBox.h"
+
+namespace msdf_atlas {
+
+/// Represents the shape geometry of a single glyph as well as its configuration
+class GlyphGeometry {
+
+public:
+    GlyphGeometry();
+    /// Loads glyph geometry from font
+    bool load(msdfgen::FontHandle *font, double geometryScale, msdfgen::GlyphIndex index, bool preprocessGeometry = true);
+    bool load(msdfgen::FontHandle *font, double geometryScale, unicode_t codepoint, bool preprocessGeometry = true);
+    /// Applies edge coloring to glyph shape
+    void edgeColoring(void (*fn)(msdfgen::Shape &, double, unsigned long long), double angleThreshold, unsigned long long seed);
+    /// Computes the dimensions of the glyph's box as well as the transformation for the generator function
+    void wrapBox(double scale, double range, double miterLimit);
+    /// Sets the glyph's box's position in the atlas
+    void placeBox(int x, int y);
+    /// Sets the glyph's box's rectangle in the atlas
+    void setBoxRect(const Rectangle &rect);
+    /// Returns the glyph's index within the font
+    int getIndex() const;
+    /// Returns the glyph's index as a msdfgen::GlyphIndex
+    msdfgen::GlyphIndex getGlyphIndex() const;
+    /// Returns the Unicode codepoint represented by the glyph or 0 if unknown
+    unicode_t getCodepoint() const;
+    /// Returns the glyph's identifier specified by the supplied identifier type
+    int getIdentifier(GlyphIdentifierType type) const;
+    /// Returns the glyph's shape
+    const msdfgen::Shape & getShape() const;
+    /// Returns the glyph's advance
+    double getAdvance() const;
+    /// Returns the glyph's box in the atlas
+    Rectangle getBoxRect() const;
+    /// Outputs the position and dimensions of the glyph's box in the atlas
+    void getBoxRect(int &x, int &y, int &w, int &h) const;
+    /// Outputs the dimensions of the glyph's box in the atlas
+    void getBoxSize(int &w, int &h) const;
+    /// Returns the range needed to generate the glyph's SDF
+    double getBoxRange() const;
+    /// Returns the projection needed to generate the glyph's bitmap
+    msdfgen::Projection getBoxProjection() const;
+    /// Returns the scale needed to generate the glyph's bitmap
+    double getBoxScale() const;
+    /// Returns the translation vector needed to generate the glyph's bitmap
+    msdfgen::Vector2 getBoxTranslate() const;
+    /// Outputs the bounding box of the glyph as it should be placed on the baseline
+    void getQuadPlaneBounds(double &l, double &b, double &r, double &t) const;
+    /// Outputs the bounding box of the glyph in the atlas
+    void getQuadAtlasBounds(double &l, double &b, double &r, double &t) const;
+    /// Returns true if the glyph is a whitespace and has no geometry
+    bool isWhitespace() const;
+    /// Simplifies to GlyphBox
+    operator GlyphBox() const;
+
+private:
+    int index;
+    unicode_t codepoint;
+    double geometryScale;
+    msdfgen::Shape shape;
+    msdfgen::Shape::Bounds bounds;
+    double advance;
+    struct {
+        Rectangle rect;
+        double range;
+        double scale;
+        msdfgen::Vector2 translate;
+    } box;
+
+};
+
+}