509: how to get exact bound of a glyph

LayoutFarm · May 13, 2017 · 23f5cac · prepare · May 13, 2017 · prepare
1 parent 32e690d
commit 23f5cac
Show file tree

Hide file tree

Showing 2 changed files with 27 additions and 16 deletions.
diff --git a/Demo/Windows/PixelFarmSample.WinForms/Form1.cs b/Demo/Windows/PixelFarmSample.WinForms/Form1.cs
@@ -636,20 +636,20 @@ private void cmdBuildMsdfTexture_Click(object sender, EventArgs e)
             //samples...
             //1. create texture from specific glyph index range
             string sampleFontFile = @"..\..\..\TestFonts\tahoma.ttf";
-            CreateSampleMsdfTextureFont(
-                sampleFontFile,
-                18,
-                0,
-                255,
-                "d:\\WImageTest\\sample_msdf.png");
+            //CreateSampleMsdfTextureFont(
+            //    sampleFontFile,
+            //    18,
+            //    0,
+            //    255,
+            //    "d:\\WImageTest\\sample_msdf.png");
             //---------------------------------------------------------
             //2. for debug, create from some unicode chars
             //
-            //CreateSampleMsdfTextureFont(
-            //   sampleFontFile,
-            //   18,
-            //  new char[] { 'I' },
-            //  "d:\\WImageTest\\sample_msdf.png");
+            CreateSampleMsdfTextureFont(
+               sampleFontFile,
+               18,
+              new char[] { 'j' },
+              "d:\\WImageTest\\sample_msdf2.png");
             //---------------------------------------------------------
             ////3.
             //GlyphTranslatorToContour tx = new GlyphTranslatorToContour();
@@ -693,12 +693,25 @@ static void CreateSampleMsdfTextureFont(
                 {
                     //build glyph
                     ushort gindex = typeface.LookupIndex(chars[i]);
-                    builder.BuildFromGlyphIndex(gindex, -1);
+                    //-----------------------------------
+                    //get exact bounds of glyphs
+                    Glyph glyph = typeface.GetGlyphByIndex(gindex);
+                    Bounds bounds = glyph.Bounds;  //exact bounds
 
+                    //-----------------------------------
+                    builder.BuildFromGlyphIndex(gindex, -1);
                     var glyphToContour = new GlyphTranslatorToContour();
                     //glyphToContour.Read(builder.GetOutputPoints(), builder.GetOutputContours());
                     builder.ReadShapes(glyphToContour);
-                    msdfGenParams.shapeScale = 1f / 64;
+                    float scale = 1f / 64;
+                    msdfGenParams.shapeScale = scale;
+                    float s_xmin = bounds.XMin * scale;
+                    float s_xmax = bounds.XMax * scale;
+                    float s_ymin = bounds.YMin * scale;
+                    float s_ymax = bounds.YMax * scale;
+
+
+                    //-----------------------------------
                     GlyphImage glyphImg = MsdfGlyphGen.CreateMsdfImage(glyphToContour, msdfGenParams);
                     atlasBuilder.AddGlyph(gindex, glyphImg);
                     int w = glyphImg.Width;

diff --git a/Typography.OpenFont/OpenFontReader.cs b/Typography.OpenFont/OpenFontReader.cs
@@ -109,9 +109,7 @@ public Typeface Read(Stream stream, ReadFlags readFlags = ReadFlags.Full)
 
                 EBLCTable fontBmpTable = ReadTableIfExists(tables, input, new EBLCTable());
                 //---------------------------------------------
-                //about truetype instruction init
-
-
+                //about truetype instruction init 
 
                 //--------------------------------------------- 
                 var typeface = new Typeface(