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switch to stb_truetype
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@Avibah
Avibah committed Mar 12, 2024
1 parent b9ec5fd commit 3221c9f
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Showing 37 changed files with 455 additions and 543 deletions.
10 changes: 5 additions & 5 deletions Editor/New SSQE/Font/FontRenderer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,11 +14,11 @@ internal class FontRenderer
{"square", new Tuple<TextureUnit, int>(TextureUnit.Texture14, 14) },
{"squareo", new Tuple<TextureUnit, int>(TextureUnit.Texture13, 13) }
};
private static readonly Dictionary<string, FtFont> fonts = new()
private static readonly Dictionary<string, StbFont> fonts = new()
{
{"main", new FtFont("main", FontIndex["main"].Item1) },
{"square", new FtFont("square", FontIndex["square"].Item1) },
{"squareo", new FtFont("squareo", FontIndex["squareo"].Item1) }
{"main", new StbFont("main", FontIndex["main"].Item1) },
{"square", new StbFont("square", FontIndex["square"].Item1) },
{"squareo", new StbFont("squareo", FontIndex["squareo"].Item1) }
};

public static Vector4[] Print(float x, float y, string text, int fontSize, string font)
Expand All @@ -42,7 +42,7 @@ public static void SetActive(string font)
GL.Uniform1i(location, FontIndex[font].Item2);

location = GL.GetUniformLocation(Shader.FontTexProgram, "TexLookup");
GL.Uniform4f(location, FtFont.CharRange, fonts[font].AtlasMetrics);
GL.Uniform4f(location, StbFont.CharRange, fonts[font].AtlasMetrics);

location = GL.GetUniformLocation(Shader.FontTexProgram, "CharSize");
GL.Uniform2f(location, fonts[font].CharSize);
Expand Down
147 changes: 66 additions & 81 deletions Editor/New SSQE/Font/FtFont.cs → Editor/New SSQE/Font/StbFont.cs
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Original file line number Diff line number Diff line change
@@ -1,136 +1,141 @@
using System;
using System.Linq;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Mathematics;
using SharpFont;
using SkiaSharp;
using System.IO;
using StbTrueTypeSharp;
using System.Linq;

namespace New_SSQE
{
internal class FtFont
internal unsafe class StbFont
{
// Standard ASCII range: 128 (why was the old editor's range 400)
public static readonly int CharRange = 128;
// Character size initially rendered to be scaled later
// Greater values are smoother but take more memory
private static readonly int OriginSize = 128;
// Pixels between each character in rendered layout, needs to be above 0 to ensure no ghost pixels appear while rendering
// Pixels between each character in rendered layout
// Needs to be above 0 to ensure no ghost pixels appear while rendering
// Recommended: 4
private static readonly int CharSpacing = 4;

private readonly int[] Extents;
private readonly int[] Bearings;
private readonly int[] YOffsets;
private readonly SKBitmap[] Bitmaps;
private readonly SKBitmap Bitmap;

public Vector2 CharSize;
public Vector4[] AtlasMetrics;
public VertexArrayHandle VaO;
public BufferHandle[] VbOs;
public BufferHandle StaticVbO;

private readonly int BmpWidth;
private readonly int BmpHeight;

private readonly int _baseline;
private readonly int _charSize;
private readonly TextureHandle _handle;

public TextureHandle Handle => _handle;

// Change unit to store multiple fonts without having to switch between handles while rendering
// Otherwise extract the handle via FTFont.Handle and manage switching elsewhere
public FtFont(string font, TextureUnit unit = TextureUnit.Texture15)
// Otherwise extract the handle via StbFont.Handle and manage switching elsewhere
public unsafe StbFont(string font, TextureUnit unit = TextureUnit.Texture15)
{
Library library = new();
Face face = new(library, $"assets/fonts/{font}.ttf");

SKBitmap[] Bitmaps;

face.SetCharSize(OriginSize, OriginSize, 96, 96);
face.SetPixelSizes((uint)OriginSize, (uint)OriginSize);
// Some font size discrepancies exist between FreeType and stb_truetype but the majority of the loader is the same

Bitmaps = new SKBitmap[CharRange];
YOffsets = new int[CharRange];
Extents = new int[CharRange];
Bearings = new int[CharRange];
YOffsets = new int[CharRange];
Bitmaps = new SKBitmap[CharRange];

// Render each character in the given range individually and store its metrics in various arrays
for (uint c = 0; c < CharRange; c++)
{
var index = face.GetCharIndex(c);
AtlasMetrics = new Vector4[CharRange];

var fontInfo = StbTrueType.CreateFont(File.ReadAllBytes($"assets/fonts/{font}.ttf"), 0);
var scale = StbTrueType.stbtt_ScaleForPixelHeight(fontInfo, OriginSize);

face.LoadGlyph(index, LoadFlags.Render | LoadFlags.Default, LoadTarget.Normal);
int ascent, descent, lineGap;
StbTrueType.stbtt_GetFontVMetrics(fontInfo, &ascent, &descent, &lineGap);

FTBitmap glyph = face.Glyph.Bitmap;
int size = glyph.Width * glyph.Rows;
// Render each character in the given range individually
for (int i = 0; i < CharRange; i++)
{
int width, height, xoffset, yoffset;
byte* glyph = StbTrueType.stbtt_GetCodepointBitmap(fontInfo, scale, scale, i, &width, &height, &xoffset, &yoffset);

Bitmaps[c] = ConvertToSKBitmap(glyph);
Extents[c] = face.Glyph.Bitmap.Width + face.Glyph.BitmapLeft;
Bearings[c] = face.Glyph.BitmapLeft;
Bitmaps[i] = ConvertToSKBitmap(glyph, width, height);
Extents[i] = width + xoffset;
Bearings[i] = xoffset;

if (size <= 0 && c == 32)
Extents[c] = OriginSize / 4;
if (width * height <= 0 && i == 32)
Extents[i] = OriginSize / 4;
else
YOffsets[c] = face.Glyph.BitmapTop;
YOffsets[i] = yoffset;
}

_baseline = (int)(face.Size.Metrics.Ascender - face.Size.Metrics.Descender / 2);
_baseline = (int)(scale * ascent);

var maxCharX = Extents.Max();
var maxCharY = face.Glyph.Metrics.VerticalAdvance + YOffsets.Max();
int px = (int)(maxCharX * maxCharY);
var maxCharY = (int)(scale * (ascent - descent)) + YOffsets.Max();
int px = maxCharX * maxCharY;
CharSize = new(maxCharX, maxCharY);

var texSize = Math.Sqrt(px * CharRange);
var texX = (int)(texSize / maxCharX + 1) * (maxCharX + CharSpacing);
var texY = (int)(texSize / maxCharY + 1) * ((int)maxCharY + CharSpacing);
var texY = (int)(texSize / maxCharY + 1) * (maxCharY + CharSpacing);

var info = new SKImageInfo(texX + 1, texY);
var surface = SKSurface.Create(info);
var canvas = surface.Canvas;

float currentX = 0;
float currentY = YOffsets.Max();
float currentY = 0;

// Combine each character's bitmap on a main canvas to later store into memory
int charsPerLine = (int)(info.Width / (CharSize.X + CharSpacing));
float txW = CharSize.X / info.Width;
float txH = CharSize.Y / info.Height;

for (uint c = 0; c < CharRange; c++)
{
if (currentX + maxCharX > texX)
{
currentX = 0;
currentY += (int)maxCharY + CharSpacing;
currentY += maxCharY + CharSpacing;
}

if (Bitmaps[c].ByteCount > 0)
canvas.DrawBitmap(Bitmaps[c], currentX, currentY - YOffsets[c]);
canvas.DrawBitmap(Bitmaps[c], currentX, currentY + _baseline + YOffsets[c]);
currentX += maxCharX + CharSpacing;

Bitmaps[c].Dispose();
}

Bitmap = SKBitmap.FromImage(surface.Snapshot());
GC.KeepAlive(Bitmap);
CharSize = new(maxCharX, (int)maxCharY);
float txX = c % charsPerLine * (CharSize.X + CharSpacing);
float txY = c / charsPerLine * (CharSize.Y + CharSpacing);

BmpWidth = Bitmap.Width;
BmpHeight = Bitmap.Height;
AtlasMetrics[c] = (txX / info.Width, txY / info.Height, txW, txH);
}

// put font texture metrics into array for uploading to a font shader
AtlasMetrics = new Vector4[CharRange];
_baseline -= (int)(scale * descent);

int charsPerLine = (int)(BmpWidth / (CharSize.X + CharSpacing));
float txW = CharSize.X / BmpWidth;
float txH = CharSize.Y / BmpHeight;
Bitmap = SKBitmap.FromImage(surface.Snapshot());
GC.KeepAlive(Bitmap);

for (int i = 0; i < CharRange; i++)
{
float txX = (i % charsPerLine) * (CharSize.X + CharSpacing);
float txY = (i / charsPerLine) * (CharSize.Y + CharSpacing);
fontInfo.Dispose();

AtlasMetrics[i] = (txX / BmpWidth, txY / BmpHeight, txW, txH);
}
// Store the font texture as a png in the current directory - for debugging
/*
using (var image = surface.Snapshot())
using (var imgData = image.Encode(SKEncodedImageFormat.Png, 80))
using (var stream = File.OpenWrite("font_texture.png"))
imgData.SaveTo(stream);
*/

// prep instance data in shader
canvas.Dispose();
surface.Dispose();

// Prep instance data in shader
VbOs = new BufferHandle[2];

VaO = GL.GenVertexArray();
Expand Down Expand Up @@ -169,42 +174,22 @@ public FtFont(string font, TextureUnit unit = TextureUnit.Texture15)
GL.BindBuffer(BufferTargetARB.ArrayBuffer, BufferHandle.Zero);
GL.BindVertexArray(VertexArrayHandle.Zero);


// Store the font texture as a png in the current directory - for debugging
/*
using (var image = surface.Snapshot())
using (var data = image.Encode(SKEncodedImageFormat.Png, 80))
using (var stream = File.OpenWrite("font_texture.png"))
data.SaveTo(stream);
*/


face.Dispose();
library.Dispose();


// Load the texture into memory
_handle = GL.GenTexture();

GL.ActiveTexture(unit);
GL.BindTexture(TextureTarget.Texture2d, _handle);

GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgba, BmpWidth, BmpHeight, 0,
GL.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgba, Bitmap.Width, Bitmap.Height, 0,
PixelFormat.Bgra, PixelType.UnsignedByte, Bitmap.GetPixels());

GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
GL.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);

canvas.Dispose();
surface.Dispose();
}

// Converts alpha map to RGBa
private static SKBitmap ConvertToSKBitmap(FTBitmap bitmap)
// Converts alpha bitmap to RGBa
private static SKBitmap ConvertToSKBitmap(byte* bytes, int width, int height)
{
byte[] bytes = bitmap.Buffer != IntPtr.Zero ? bitmap.BufferData : Array.Empty<byte>();
int width = bitmap.Pitch, height = bitmap.Rows;

var pixels = new SKColor[width * height];

for (int row = 0; row < height; row++)
Expand All @@ -220,7 +205,7 @@ private static SKBitmap ConvertToSKBitmap(FTBitmap bitmap)
}
}

return new SKBitmap(bitmap.Pitch, bitmap.Rows) { Pixels = pixels };
return new SKBitmap(width, height) { Pixels = pixels };
}

// Returns baseline of font scaled depending on font size
Expand Down
10 changes: 5 additions & 5 deletions Editor/New SSQE/GUI/GuiWindowCreate.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,12 @@ namespace New_SSQE.GUI
{
internal class GuiWindowCreate : GuiWindow
{
private readonly GuiLabel Label = new(832, 478, 256, 20, "Input Audio ID", 24);
private readonly GuiTextbox IDBox = new(832, 508, 256, 64, "", 24, false);
private readonly GuiLabel Label = new(832, 478, 256, 20, "Input Audio ID", 30);
private readonly GuiTextbox IDBox = new(832, 508, 256, 64, "", 30, false);

private readonly GuiButton CreateButton = new(832, 592, 256, 64, 0, "CREATE", 32);
private readonly GuiButton ImportButton = new(832, 666, 256, 64, 1, "IMPORT FILE", 32);
private readonly GuiButton BackButton = new(832, 740, 256, 64, 2, "BACK", 32);
private readonly GuiButton CreateButton = new(832, 592, 256, 64, 0, "CREATE", 38);
private readonly GuiButton ImportButton = new(832, 666, 256, 64, 1, "IMPORT FILE", 38);
private readonly GuiButton BackButton = new(832, 740, 256, 64, 2, "BACK", 38);

public GuiWindowCreate() : base(0, 0, MainWindow.Instance.ClientSize.X, MainWindow.Instance.ClientSize.Y)
{
Expand Down
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