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Location: alysbrooks-public/games/isometric-park-fna/SpriteFontPlus/src/FontStashSharp/FontAtlas.cs - annotation

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Commit Description:
Factor out some details into Simulation.
Commit Description:
Factor out some details into Simulation.
References:
r27:acd09f0eea20 default
File last commit:
r0:e33f209de7e5 default
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SpriteFontPlus/src/FontStashSharp/FontAtlas.cs
216 lines | 4.1 KiB | text/x-csharp | CSharpLexer
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alys
Early working version (including all dependencies, lol).
 r0 using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using System;
namespace FontStashSharp
{
internal class FontAtlas
{
public int Width
{
get; private set;
}
public int Height
{
get; private set;
}
public int NodesNumber
{
get; private set;
}
public FontAtlasNode[] Nodes
{
get; private set;
}
public Texture2D Texture
{
get; set;
}
public FontAtlas(int w, int h, int count)
{
Width = w;
Height = h;
Nodes = new FontAtlasNode[count];
count = 0;
Nodes[0].X = 0;
Nodes[0].Y = 0;
Nodes[0].Width = w;
NodesNumber++;
}
public void InsertNode(int idx, int x, int y, int w)
{
if (NodesNumber + 1 > Nodes.Length)
{
var oldNodes = Nodes;
var newLength = Nodes.Length == 0 ? 8 : Nodes.Length * 2;
Nodes = new FontAtlasNode[newLength];
for (var i = 0; i < oldNodes.Length; ++i)
{
Nodes[i] = oldNodes[i];
}
}
for (var i = NodesNumber; i > idx; i--)
Nodes[i] = Nodes[i - 1];
Nodes[idx].X = x;
Nodes[idx].Y = y;
Nodes[idx].Width = w;
NodesNumber++;
}
public void RemoveNode(int idx)
{
if (NodesNumber == 0)
return;
for (var i = idx; i < NodesNumber - 1; i++)
Nodes[i] = Nodes[i + 1];
NodesNumber--;
}
public void Expand(int w, int h)
{
if (w > Width)
InsertNode(NodesNumber, Width, 0, w - Width);
Width = w;
Height = h;
}
public void Reset(int w, int h)
{
Width = w;
Height = h;
NodesNumber = 0;
Nodes[0].X = 0;
Nodes[0].Y = 0;
Nodes[0].Width = w;
NodesNumber++;
}
public bool AddSkylineLevel(int idx, int x, int y, int w, int h)
{
InsertNode(idx, x, y + h, w);
for (var i = idx + 1; i < NodesNumber; i++)
if (Nodes[i].X < Nodes[i - 1].X + Nodes[i - 1].Width)
{
var shrink = Nodes[i - 1].X + Nodes[i - 1].Width - Nodes[i].X;
Nodes[i].X += shrink;
Nodes[i].Width -= shrink;
if (Nodes[i].Width <= 0)
{
RemoveNode(i);
i--;
}
else
{
break;
}
}
else
{
break;
}
for (var i = 0; i < NodesNumber - 1; i++)
if (Nodes[i].Y == Nodes[i + 1].Y)
{
Nodes[i].Width += Nodes[i + 1].Width;
RemoveNode(i + 1);
i--;
}
return true;
}
public int RectFits(int i, int w, int h)
{
var x = Nodes[i].X;
var y = Nodes[i].Y;
if (x + w > Width)
return -1;
var spaceLeft = w;
while (spaceLeft > 0)
{
if (i == NodesNumber)
return -1;
y = Math.Max(y, Nodes[i].Y);
if (y + h > Height)
return -1;
spaceLeft -= Nodes[i].Width;
++i;
}
return y;
}
public bool AddRect(int rw, int rh, ref int rx, ref int ry)
{
var besth = Height;
var bestw = Width;
var besti = -1;
var bestx = -1;
var besty = -1;
for (var i = 0; i < NodesNumber; i++)
{
var y = RectFits(i, rw, rh);
if (y != -1)
if (y + rh < besth || y + rh == besth && Nodes[i].Width < bestw)
{
besti = i;
bestw = Nodes[i].Width;
besth = y + rh;
bestx = Nodes[i].X;
besty = y;
}
}
if (besti == -1)
return false;
if (!AddSkylineLevel(besti, bestx, besty, rw, rh))
return false;
rx = bestx;
ry = besty;
return true;
}
public void RenderGlyph(GraphicsDevice device, FontGlyph glyph)
{
if (glyph.Bounds.Width == 0 || glyph.Bounds.Height == 0)
{
return;
}
// Render glyph to byte buffer
var buffer = new byte[glyph.Bounds.Width * glyph.Bounds.Height];
Array.Clear(buffer, 0, buffer.Length);
var g = glyph.Index;
glyph.Font.RenderGlyphBitmap(buffer,
glyph.Bounds.Width,
glyph.Bounds.Height,
glyph.Bounds.Width,
g);
// Byte buffer to RGBA
var colorBuffer = new Color[glyph.Bounds.Width * glyph.Bounds.Height];
for (var i = 0; i < colorBuffer.Length; ++i)
{
var c = buffer[i];
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = colorBuffer[i].A = c;
}
// Write to texture
if (Texture == null)
{
Texture = new Texture2D(device, Width, Height);
}
Texture.SetData(0, glyph.Bounds, colorBuffer, 0, colorBuffer.Length);
}
}
}