Implement Experiment of NFontApi

source/NFontApi.cpp

@@ -0,0 +1,70 @@
+#include <renderd7/Fonts/NFontApi.hpp>
+#define STB_TRUETYPE_IMPLEMENTATION  // force following include to generate implementation
+#include <renderd7/external/stb_truetype.h>
+
+RenderD7::NFontApi::NFontApi()
+{
+    
+}
+
+RenderD7::NFontApi::~NFontApi()
+{
+    
+}
+
+void RenderD7::NFontApi::LoadTTF(std::string path)
+{
+    /////READ FILE
+    unsigned char* buffer;
+    long size = 0;
+    FILE *ttf__ = fopen(path.c_str(), "rb");
+    fseek(ttf__, 0, SEEK_END);
+    size = ftell(ttf__);
+    fseek(ttf__, 0, SEEK_SET);
+    buffer = (unsigned char*)malloc(size);
+    fread(buffer, size, 1, ttf__);
+    fclose(ttf__);
+    /////Setup Font
+    if (!stbtt_InitFont(&font, buffer, 0))
+    {
+        printf("failed\n");
+        status+="failed\n";
+        return;
+    }
+    status+="success!\n";
+    l_h = 24; /* line height */
+    scale = stbtt_ScaleForPixelHeight(&font, l_h);
+
+    stbtt_GetFontVMetrics(&font, &ascent,&decent,0);
+	baseline = (int) (ascent*scale);
+	height = (int) ((ascent - decent)*scale);
+    
+}
+
+std::vector<unsigned char> RenderD7::NFontApi::GetGlyphBitmap(int glyph)
+{
+    stbtt_GetGlyphBitmapBox(&font, glyph, scale, scale, &x0, &y0, &x1, &y1);
+    w = x1-x0;
+	h = y1-y0;
+    
+	std::vector<unsigned char> bitmap;
+    bitmap.resize(h*w);
+    stbtt_MakeGlyphBitmap(&font, bitmap.data(), w, h, w, scale, scale, glyph);
+    return bitmap;
+}
+
+int RenderD7::NFontApi::GetGlyphHeight(int glyph)
+{
+    stbtt_GetGlyphBitmapBox(&font, glyph, scale, scale, &x0, &y0, &x1, &y1);
+    w = x1-x0;
+	h = y1-y0;
+    return h;
+}
+
+int RenderD7::NFontApi::GetGlyphWidth(int glyph)
+{
+    stbtt_GetGlyphBitmapBox(&font, glyph, scale, scale, &x0, &y0, &x1, &y1);
+    w = x1-x0;
+	h = y1-y0;
+    return w;
+}