From 9b83919815f6a6ce5d73da1c28483970d0ca5589 Mon Sep 17 00:00:00 2001
From: unknown <paulx161@umn.edu>
Date: Wed, 3 Feb 2021 14:22:28 -0600
Subject: added dev/MinGfx/

---
 dev/MinGfx/src/text_shader.h | 110 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 dev/MinGfx/src/text_shader.h

(limited to 'dev/MinGfx/src/text_shader.h')

diff --git a/dev/MinGfx/src/text_shader.h b/dev/MinGfx/src/text_shader.h
new file mode 100644
index 0000000..a075cd2
--- /dev/null
+++ b/dev/MinGfx/src/text_shader.h
@@ -0,0 +1,110 @@
+/*
+ This file is part of the MinGfx Project.
+ 
+ Copyright (c) 2017,2018 Regents of the University of Minnesota.
+ All Rights Reserved.
+ 
+ Original Author(s) of this File:
+	Dan Keefe, 2018, University of Minnesota
+	
+ Author(s) of Significant Updates/Modifications to the File:
+	...
+ */
+
+#ifndef SRC_TEXT_SHADER_H_
+#define SRC_TEXT_SHADER_H_
+
+#include <string>
+#include <map>
+
+#include "matrix4.h"
+#include "mesh.h"
+#include "shader_program.h"
+#include "texture2d.h"
+
+// disable warnings for this 3rd party code
+#pragma warning ( push, 0 )
+#include <stb_truetype.h>
+#pragma warning ( pop )
+
+namespace mingfx {
+    
+
+
+/**
+ */
+class TextShader {
+public:
+    TextShader();
+    virtual ~TextShader();
+    
+    /// Call this from within the InitOpenGL() function since it will initialize
+    /// not just the Font's internal data but also an OpenGL texture to be
+    /// stored on the graphics card.  Internally, this uses the stb_truetype
+    /// library to load true type fonts (files with a .ttf extension).
+    bool Init(const std::string &font_file, int native_font_size);
+    
+    enum class HorizAlign {
+        HORIZ_ALIGN_LEFT,
+        HORIZ_ALIGN_CENTER,
+        HORIZ_ALIGN_RIGHT
+    };
+
+    enum class VertAlign {
+        VERT_ALIGN_TOP,
+        VERT_ALIGN_CENTER,
+        VERT_ALIGN_BASELINE,
+        VERT_ALIGN_BOTTOM
+    };
+    
+    class TextFormat {
+    public:
+        // constructor sets defaults
+        TextFormat() :
+            size(0.1f),
+            color(1,1,1,1),
+            h_align(HorizAlign::HORIZ_ALIGN_CENTER),
+            v_align(VertAlign::VERT_ALIGN_BASELINE) {}
+        
+        float size;
+        Color color;
+        HorizAlign h_align;
+        VertAlign v_align;
+    };
+    
+
+    //void Draw2D(const Point2 &pos,
+    //            const std::string &text, TextFormat format, bool cache=false);
+
+    
+    void Draw3D(const Matrix4 &model, const Matrix4 &view, const Matrix4 &projection,
+                const std::string &text, TextFormat format, bool cache=false);
+
+    
+    Vector2 TextExtents(const std::string &text, TextFormat format, bool cache=false);
+    
+    float native_font_size();
+    
+private:
+    Texture2D atlas_;
+    float native_font_size_;
+    
+    stbtt_packedchar chardata_[128];
+    
+    struct MeshData {
+        Mesh mesh;
+        Point2 min;
+        Point2 max;
+    };
+    
+    void SetTextMesh(const std::string &text, MeshData *md);
+
+    std::map<std::string, MeshData> cache_;
+    MeshData tmp_md_;
+
+    ShaderProgram shader_;
+};
+    
+} // end namespace
+
+#endif
-- 
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