ryujinx/Ryujinx.Profiler/UI/SharpFontHelpers/FontService.cs
Alex Barney b2b736abc2 Misc cleanup (#708)
* Fix typos

* Remove unneeded using statements

* Enforce var style more

* Remove redundant qualifiers

* Fix some indentation

* Disable naming warnings on files with external enum names

* Fix build

* Mass find & replace for comments with no spacing

* Standardize todo capitalization and for/if spacing
2019-07-02 04:39:22 +02:00

257 lines
8.9 KiB
C#

using System;
using System.IO;
using System.Runtime.InteropServices;
using OpenTK;
using OpenTK.Graphics.OpenGL;
using SharpFont;
namespace Ryujinx.Profiler.UI.SharpFontHelpers
{
public class FontService
{
private struct CharacterInfo
{
public float Left;
public float Right;
public float Top;
public float Bottom;
public int Width;
public float Height;
public float AspectRatio;
public float BearingX;
public float BearingY;
public float Advance;
}
private const int SheetWidth = 1024;
private const int SheetHeight = 512;
private int ScreenWidth, ScreenHeight;
private int CharacterTextureSheet;
private CharacterInfo[] characters;
public Color fontColor { get; set; } = Color.Black;
private string GetFontPath()
{
string fontFolder = Environment.GetFolderPath(Environment.SpecialFolder.Fonts);
// Only uses Arial, add more fonts here if wanted
string path = Path.Combine(fontFolder, "arial.ttf");
if (File.Exists(path))
{
return path;
}
throw new Exception($"Profiler exception. Required font Courier New or Arial not installed to {fontFolder}");
}
public void InitializeTextures()
{
// Create and init some vars
uint[] rawCharacterSheet = new uint[SheetWidth * SheetHeight];
int x;
int y;
int lineOffset;
int maxHeight;
x = y = lineOffset = maxHeight = 0;
characters = new CharacterInfo[94];
// Get font
var font = new FontFace(File.OpenRead(GetFontPath()));
// Update raw data for each character
for (int i = 0; i < 94; i++)
{
var surface = RenderSurface((char)(i + 33), font, out float xBearing, out float yBearing, out float advance);
characters[i] = UpdateTexture(surface, ref rawCharacterSheet, ref x, ref y, ref lineOffset);
characters[i].BearingX = xBearing;
characters[i].BearingY = yBearing;
characters[i].Advance = advance;
if (maxHeight < characters[i].Height)
maxHeight = (int)characters[i].Height;
}
// Fix height for characters shorter than line height
for (int i = 0; i < 94; i++)
{
characters[i].BearingX /= characters[i].Width;
characters[i].BearingY /= maxHeight;
characters[i].Advance /= characters[i].Width;
characters[i].Height /= maxHeight;
characters[i].AspectRatio = (float)characters[i].Width / maxHeight;
}
// Convert raw data into texture
CharacterTextureSheet = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, CharacterTextureSheet);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Clamp);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Clamp);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, SheetWidth, SheetHeight, 0, PixelFormat.Rgba, PixelType.UnsignedInt8888, rawCharacterSheet);
GL.BindTexture(TextureTarget.Texture2D, 0);
}
public void UpdateScreenHeight(int height)
{
ScreenHeight = height;
}
public float DrawText(string text, float x, float y, float height, bool draw = true)
{
float originalX = x;
// Skip out of bounds draw
if (y < height * -2 || y > ScreenHeight + height * 2)
{
draw = false;
}
if (draw)
{
// Use font map texture
GL.BindTexture(TextureTarget.Texture2D, CharacterTextureSheet);
// Enable blending and textures
GL.Enable(EnableCap.Texture2D);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
// Draw all characters
GL.Begin(PrimitiveType.Triangles);
GL.Color4(fontColor);
}
for (int i = 0; i < text.Length; i++)
{
if (text[i] == ' ')
{
x += height / 4;
continue;
}
CharacterInfo charInfo = characters[text[i] - 33];
float width = (charInfo.AspectRatio * height);
x += (charInfo.BearingX * charInfo.AspectRatio) * width;
float right = x + width;
if (draw)
{
DrawChar(charInfo, x, right, y + height * (charInfo.Height - charInfo.BearingY), y - height * charInfo.BearingY);
}
x = right + charInfo.Advance * charInfo.AspectRatio + 1;
}
if (draw)
{
GL.End();
// Cleanup for caller
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.Disable(EnableCap.Texture2D);
GL.Disable(EnableCap.Blend);
}
// Return width of rendered text
return x - originalX;
}
private void DrawChar(CharacterInfo charInfo, float left, float right, float top, float bottom)
{
GL.TexCoord2(charInfo.Left, charInfo.Bottom); GL.Vertex2(left, bottom);
GL.TexCoord2(charInfo.Left, charInfo.Top); GL.Vertex2(left, top);
GL.TexCoord2(charInfo.Right, charInfo.Top); GL.Vertex2(right, top);
GL.TexCoord2(charInfo.Right, charInfo.Top); GL.Vertex2(right, top);
GL.TexCoord2(charInfo.Right, charInfo.Bottom); GL.Vertex2(right, bottom);
GL.TexCoord2(charInfo.Left, charInfo.Bottom); GL.Vertex2(left, bottom);
}
public unsafe Surface RenderSurface(char c, FontFace font, out float xBearing, out float yBearing, out float advance)
{
var glyph = font.GetGlyph(c, 64);
xBearing = glyph.HorizontalMetrics.Bearing.X;
yBearing = glyph.RenderHeight - glyph.HorizontalMetrics.Bearing.Y;
advance = glyph.HorizontalMetrics.Advance;
var surface = new Surface
{
Bits = Marshal.AllocHGlobal(glyph.RenderWidth * glyph.RenderHeight),
Width = glyph.RenderWidth,
Height = glyph.RenderHeight,
Pitch = glyph.RenderWidth
};
var stuff = (byte*)surface.Bits;
for (int i = 0; i < surface.Width * surface.Height; i++)
*stuff++ = 0;
glyph.RenderTo(surface);
return surface;
}
private CharacterInfo UpdateTexture(Surface surface, ref uint[] rawCharMap, ref int posX, ref int posY, ref int lineOffset)
{
int width = surface.Width;
int height = surface.Height;
int len = width * height;
byte[] data = new byte[len];
// Get character bitmap
Marshal.Copy(surface.Bits, data, 0, len);
// Find a slot
if (posX + width > SheetWidth)
{
posX = 0;
posY += lineOffset;
lineOffset = 0;
}
// Update lineOffset
if (lineOffset < height)
{
lineOffset = height + 1;
}
// Copy char to sheet
for (int y = 0; y < height; y++)
{
int destOffset = (y + posY) * SheetWidth + posX;
int sourceOffset = y * width;
for (int x = 0; x < width; x++)
{
rawCharMap[destOffset + x] = (uint)((0xFFFFFF << 8) | data[sourceOffset + x]);
}
}
// Generate character info
CharacterInfo charInfo = new CharacterInfo()
{
Left = (float)posX / SheetWidth,
Right = (float)(posX + width) / SheetWidth,
Top = (float)(posY - 1) / SheetHeight,
Bottom = (float)(posY + height) / SheetHeight,
Width = width,
Height = height,
};
// Update x
posX += width + 1;
// Give the memory back
Marshal.FreeHGlobal(surface.Bits);
return charInfo;
}
}
}