mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-25 08:15:37 +00:00
Now uses Alpha texture. Corrected issue with PixelInternalFormat enum not being used. Added preliminary layout code.
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the_fiddler
parent
339ae77c29
commit
22c1e5011d
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@ -1,4 +1,10 @@
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using System;
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#region --- License ---
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/* Copyright (c) 2006, 2007 Stefanos Apostolopoulos
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* See license.txt for license info
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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@ -11,21 +17,26 @@ using OpenTK.Platform;
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namespace OpenTK.Fonts
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{
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public class TextureFont : IDisposable
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public class TextureFont : IFont
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{
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Font font;
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Dictionary<char, int> loaded_glyphs = new Dictionary<char, int>(36);
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Graphics gfx = Graphics.FromImage(new Bitmap(1, 1));
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//class BBox { public int X, Y, Width, Height; }
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Font font;
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//Dictionary<char, int> loaded_glyphs = new Dictionary<char, int>(36);
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Dictionary<char, RectangleF> loaded_glyphs = new Dictionary<char, RectangleF>(64);
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Graphics gfx = Graphics.FromImage(new Bitmap(1, 1));
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static int texture;
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static TexturePacker<Glyph> pack;
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static int texture_width, texture_height;
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float[] viewport = new float[6];
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#region --- Constructor ---
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/// <summary>
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/// Constructs a new TextureFont object, using the specified System.Drawing.Font.
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/// </summary>
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/// <param name="font"></param>
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/// <param name="font">The System.Drawing.Font to use.</param>
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public TextureFont(Font font)
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{
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if (font == null)
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@ -34,6 +45,41 @@ namespace OpenTK.Fonts
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this.font = font;
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}
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#endregion
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#region private void PrepareTexturePacker()
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/// <summary>
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/// Calculates the optimal size for the font texture and TexturePacker, and creates both.
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/// </summary>
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private void PrepareTexturePacker()
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{
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// Calculate the size of the texture packer. We want a power-of-two size
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// that is less than 1024 (supported in Geforce256-era cards), but large
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// enough to hold at least 256 (16*16) font glyphs.
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// TODO: Find the actual card limits, maybe?
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int size = (int)(font.Size * 16);
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size = (int)System.Math.Pow(2.0, System.Math.Ceiling(System.Math.Log((double)size, 2.0)));
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if (size > 1024)
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size = 1024;
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texture_width = size;
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texture_height = size;
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pack = new TexturePacker<Glyph>(texture_width, texture_height);
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GL.GenTextures(1, out texture);
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GL.BindTexture(GL.Enums.TextureTarget.TEXTURE_2D, texture);
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GL.TexParameter(GL.Enums.TextureTarget.TEXTURE_2D, GL.Enums.TextureParameterName.TEXTURE_MIN_FILTER, (int)GL.Enums.All.LINEAR);
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GL.TexParameter(GL.Enums.TextureTarget.TEXTURE_2D, GL.Enums.TextureParameterName.TEXTURE_MAG_FILTER, (int)GL.Enums.All.LINEAR);
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GL.TexImage2D(GL.Enums.TextureTarget.TEXTURE_2D, 0, GL.Enums.PixelInternalFormat.ALPHA, texture_width, texture_height, 0,
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GL.Enums.PixelFormat.RGBA, GL.Enums.PixelType.UNSIGNED_BYTE, IntPtr.Zero);
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}
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#endregion
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#region public void LoadGlyphs(string glyphs)
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/// <summary>
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/// Prepares the specified glyphs for rendering.
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/// </summary>
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@ -47,7 +93,11 @@ namespace OpenTK.Fonts
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}
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}
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private int LoadGlyph(char c)
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#endregion
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#region private RectangleF LoadGlyph(char c)
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private RectangleF LoadGlyph(char c)
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{
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if (pack == null)
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PrepareTexturePacker();
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@ -55,21 +105,54 @@ namespace OpenTK.Fonts
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Glyph g = new Glyph(c, font);
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Rectangle rect = pack.Add(g);
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using (Bitmap bmp = new Bitmap(g.Width, g.Height, PixelFormat.Format32bppArgb))
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using (Bitmap bmp = new Bitmap(rect.Width, rect.Height, PixelFormat.Format32bppArgb))
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using (Graphics gfx = Graphics.FromImage(bmp))
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{
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// Upload texture and create Display List:
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GL.BindTexture(GL.Enums.TextureTarget.TEXTURE_2D, texture);
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gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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//gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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//gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
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gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
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gfx.Clear(Color.Transparent);
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gfx.DrawString(g.Character.ToString(), g.Font, Brushes.White, 0.0f, 0.0f);
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BitmapData data = bmp.LockBits(new Rectangle(0, 0, g.Width, g.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
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BitmapData bmp_data = bmp.LockBits(new Rectangle(0, 0, rect.Width, rect.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
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GL.TexSubImage2D(GL.Enums.TextureTarget.TEXTURE_2D, 0, rect.Left, rect.Top, rect.Width, rect.Height,
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GL.Enums.PixelFormat.RGBA, GL.Enums.PixelType.UNSIGNED_BYTE, data.Scan0);
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bmp.UnlockBits(data);
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GL.Enums.PixelFormat.RGBA, GL.Enums.PixelType.UNSIGNED_BYTE, bmp_data.Scan0);
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bmp.UnlockBits(bmp_data);
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RectangleF f_rect = RectangleF.FromLTRB(
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rect.Left / (float)texture_width,
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rect.Top / (float)texture_height,
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rect.Right / (float)texture_width,
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rect.Bottom / (float)texture_height);
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loaded_glyphs.Add(g.Character, f_rect);
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return f_rect;
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/*
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byte[] data = new byte[rect.Width * rect.Height * 4];
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int i = 0;
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for (int y = 0; y < rect.Height - 1; y++)
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{
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for (int x = 0; x < rect.Width - 1; x++)
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{
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data[i++] = bmp.GetPixel(x, y).R;
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data[i++] = bmp.GetPixel(x, y).G;
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data[i++] = bmp.GetPixel(x, y).B;
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data[i++] = bmp.GetPixel(x, y).A;
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}
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}
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unsafe
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{
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fixed (byte* data_ptr = data)
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GL.TexSubImage2D(GL.Enums.TextureTarget.TEXTURE_2D, 0, rect.Left, rect.Top, rect.Width, rect.Height,
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GL.Enums.PixelFormat.RGBA, GL.Enums.PixelType.UNSIGNED_BYTE, (IntPtr)data_ptr);
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}
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float left = rect.Left / (float)texture_width;
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float bottom = rect.Bottom / (float)texture_height;
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@ -77,12 +160,13 @@ namespace OpenTK.Fonts
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float top = rect.Top / (float)texture_height;
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float width = rect.Right - rect.Left;
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float height = rect.Bottom - rect.Top;
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*/
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/*
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int list = GL.GenLists(1);
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GL.NewList(list, GL.Enums.ListMode.COMPILE);
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GL.Enable(GL.Enums.EnableCap.BLEND);
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GL.BlendFunc(GL.Enums.BlendingFactorSrc.ONE, GL.Enums.BlendingFactorDest.ONE_MINUS_SRC_ALPHA);
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GL.BlendFunc(GL.Enums.BlendingFactorSrc.SRC_ALPHA, GL.Enums.BlendingFactorDest.ONE_MINUS_SRC_ALPHA);
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GL.Begin(GL.Enums.BeginMode.QUADS);
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@ -109,36 +193,71 @@ namespace OpenTK.Fonts
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loaded_glyphs.Add(g.Character, list);
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return list;
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*/
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}
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}
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#endregion
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public void Draw()
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{
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ILayoutProvider l = new DefaultLayoutProvider();
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l.PerformLayout("ato e -et uq39tu, /q3t.q/t.q3t q 34t34qwt .", this,
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new RectangleF(9.0f, 9.0f, 300.0f, 100.0f), StringAlignment.Near, false);
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}
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#region
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public bool GlyphData(char glyph, ref RectangleF textureRectangle, out float width, out float height, out int texture)
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{
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if (loaded_glyphs.TryGetValue(glyph, out textureRectangle))
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{
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width = textureRectangle.Width * texture_width;
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height = textureRectangle.Height * texture_height;
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texture = TextureFont.texture;
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return true;
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}
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width = height = texture = 0;
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return false;
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}
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#endregion
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#region public RectangleF FindRectangle(char c)
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/// <summary>
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/// Calculates the optimal size for the font texture and TexturePacker, and creates both.
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/// Looks up the specified glyph and returns it's bounding System.Drawing.Rectangle in the font texture.
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/// This function will add the glyph to the texture font, if it hasn't been previoulsy loaded through LoadGlyphs().
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/// </summary>
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private void PrepareTexturePacker()
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/// <param name="c">The character representing the glyph.</param>
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/// <returns>The System.Drawing.Rectangle that represents the glyph's bounding box in the font texture.</returns>
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/// <seealso cref="LoadGlyphs"/>
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public RectangleF FindRectangle(char c)
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{
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// Calculate the size of the texture packer. We want a power-of-two size
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// that is less than 1024 (supported in Geforce256-era cards), but large
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// enough to hold at least 256 (16*16) font glyphs.
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int size = (int)(font.Size * 16);
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size = (int)System.Math.Pow(2.0, System.Math.Ceiling(System.Math.Log((double)size, 2.0)));
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if (size > 1024)
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size = 1024;
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texture_width = size;
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texture_height = size;
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pack = new TexturePacker<Glyph>(texture_width, texture_height);
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GL.GenTextures(1, out texture);
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GL.BindTexture(GL.Enums.TextureTarget.TEXTURE_2D, texture);
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GL.TexParameter(GL.Enums.TextureTarget.TEXTURE_2D, GL.Enums.TextureParameterName.TEXTURE_MIN_FILTER, (int)GL.Enums.All.LINEAR);
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GL.TexParameter(GL.Enums.TextureTarget.TEXTURE_2D, GL.Enums.TextureParameterName.TEXTURE_MAG_FILTER, (int)GL.Enums.All.NEAREST);
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byte[] data = new byte[texture_height * texture_width * 4];
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GL.TexImage2D(GL.Enums.TextureTarget.TEXTURE_2D, 0, 4, texture_width, texture_height, 0,
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GL.Enums.PixelFormat.RGBA, GL.Enums.PixelType.UNSIGNED_BYTE, data);
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RectangleF rect;
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return loaded_glyphs.TryGetValue(c, out rect) ? rect : LoadGlyph(c);
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}
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#endregion
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#region public int FindTexture(char c)
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/// <summary>
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/// Returns the handle to the OpenGL texture where the specified glyph is located or zero, if the glyph has not been loaded.
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/// </summary>
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/// <param name="c">The character that corresponds to the glyph.</param>
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/// <returns>A handle to the OpenGL texture, or zero.</returns>
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public int FindTexture(char c)
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{
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if (loaded_glyphs.ContainsKey(c))
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return texture;
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return 0;
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}
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#endregion
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#region public void Print(char c)
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#if false
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/// <summary>
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/// Prints a glyph.
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/// </summary>
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@ -159,6 +278,8 @@ namespace OpenTK.Fonts
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/// <seealso cref="PrintFast"/>
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public void Print(char c)
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{
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GL.BindTexture(GL.Enums.TextureTarget.TEXTURE_2D, texture);
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int list;
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if (loaded_glyphs.TryGetValue(c, out list))
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{
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@ -169,7 +290,11 @@ namespace OpenTK.Fonts
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GL.CallList(LoadGlyph(c));
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}
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}
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#endif
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#endregion
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#region public void PrintFast(char c)
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#if false
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/// <summary>
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/// Prints a previously loaded glyph.
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/// </summary>
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@ -184,29 +309,39 @@ namespace OpenTK.Fonts
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{
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GL.CallList(loaded_glyphs[c]);
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}
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#endif
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#endregion
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#region public float Height
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/// <summary>
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/// Gets a float indicating the default line spacing of this font.
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/// </summary>
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public float LineSpacing
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public float Height
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{
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get { return font.Height; }
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}
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#endregion
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#region public float MeasureString(string str)
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/// <summary>
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/// Measures the width of the specified string.
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public float MeasureWidth(string str)
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public SizeF MeasureString(string str)
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{
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float distance = gfx.MeasureString(str, font, 16384, StringFormat.GenericTypographic).Width;
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if (distance == 0)
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distance = font.SizeInPoints * 0.5f;
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return distance;
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SizeF size = gfx.MeasureString(str, font, 16384, StringFormat.GenericTypographic);
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if (size.Width == 0)
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size.Width = font.SizeInPoints * 0.5f;
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return size;
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}
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#region IDisposable Members
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#endregion
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#region --- IDisposable Members ---
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bool disposed;
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