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Fixed dynamic text rendering when no text is precached at all.

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the_fiddler 2008-04-13 18:29:36 +00:00
parent c56152fe3b
commit 40b074179e
1 changed files with 35 additions and 28 deletions
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53
Source/Utilities/Fonts/TextPrinter.cs
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@ -27,43 +27,49 @@ namespace OpenTK.Graphics
{
//static Regex break_point = new Regex("[ .,/*-+?\\!=]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
//static char[] split_chars = new char[] { ' ', '\n', '\t', ',', '.', '/', '?', '!', ';', '\\', '-', '+', '*', '=' };
static bool functionality_checked = false;
static ITextPrinterImplementation printer;
float[] viewport = new float[4];
// 8 chars by default
Vector2[] vertices = new Vector2[8 * 8]; // Interleaved, vertex, texcoord, vertex, etc...
Vector2[] vertices = new Vector2[8 * 8]; // Interleaved, vertex, texcoord, vertex, etc... Starts with 8 chars, will expand as needed.
ushort[] indices = new ushort[6 * 8];
#region --- Constructor ---
/// <summary>
/// Constructs a new DefaultLayoutProvider object.
/// Constructs a new TextPrinter object.
/// </summary>
public TextPrinter() { }
#endregion
#region static void CheckNeededFunctionality()
#region --- Private Members ---
#region static ITextPrinterImplementation Printer
/// <summary>
/// Checks the machine's capabilities and selects the fastest method to print text.
/// </summary>
static void CheckNeededFunctionality()
static ITextPrinterImplementation Printer
{
get
{
if (printer == null)
{
printer = (ITextPrinterImplementation)new DisplayListTextPrinter();
/*
GL.SupportsExtension("VERSION_1_5") ?
(ITextPrinterImplementation)new VboTextPrinter() :
GL.SupportsExtension("ARB_vertex_buffer_object") ? null :
GL.SupportsExtension("VERSION_1_1") ? null : null;
*/
//GL.SupportsExtension("VERSION_1_5") ?
//(ITextPrinterImplementation)new VboTextPrinter() :
//GL.SupportsExtension("ARB_vertex_buffer_object") ? null :
//GL.SupportsExtension("VERSION_1_1") ? null : null;
if (printer == null)
throw new NotSupportedException("TextPrinter requires at least OpenGL 1.1 support.");
functionality_checked = true;
Debug.Print("Using {0} for font printing.", printer);
}
return printer;
}
}
#endregion
#endregion
@ -138,14 +144,11 @@ namespace OpenTK.Graphics
/// <exception cref="NotSupportedException">Occurs when OpenGL 1.1 is not supported.</exception>
public void Prepare(string text, TextureFont font, out TextHandle handle, float width, bool wordWarp, StringAlignment alignment, bool rightToLeft)
{
if (!functionality_checked)
CheckNeededFunctionality();
int num_indices;
PerformLayout(text, font, width, wordWarp, alignment, rightToLeft, ref vertices, ref indices, out num_indices);
handle = printer.Load(vertices, indices, num_indices);
handle = Printer.Load(vertices, indices, num_indices);
handle.font = font;
}
@ -262,7 +265,7 @@ namespace OpenTK.Graphics
{
GL.BindTexture(TextureTarget.Texture2D, handle.font.Texture);
printer.Draw(handle);
Printer.Draw(handle);
}
#endregion
@ -278,7 +281,10 @@ namespace OpenTK.Graphics
{
int num_indices;
PerformLayout(text, font, 0, false, StringAlignment.Near, false, ref vertices, ref indices, out num_indices);
printer.Draw(vertices, indices, num_indices);
GL.BindTexture(TextureTarget.Texture2D, font.Texture);
Printer.Draw(vertices, indices, num_indices);
}
#endregion
@ -290,6 +296,9 @@ namespace OpenTK.Graphics
/// </summary>
public void Begin()
{
if (GraphicsContext.CurrentContext == null)
throw new GraphicsContextException("No GraphicsContext is current in the calling thread.");
GL.GetFloat(GetPName.Viewport, viewport);
// Prepare to draw text. We want pixel perfect precision, so we setup a 2D mode,
@ -305,9 +314,7 @@ namespace OpenTK.Graphics
GL.PushMatrix();
GL.LoadIdentity();
GL.PushAttrib(AttribMask.TextureBit);
GL.PushAttrib(AttribMask.EnableBit);
GL.PushAttrib(AttribMask.ColorBufferBit);
GL.PushAttrib(AttribMask.TextureBit | AttribMask.EnableBit | AttribMask.ColorBufferBit);
GL.Enable(EnableCap.Texture2D);
GL.Enable(EnableCap.Blend);