152 lines
No EOL
6.9 KiB
C#
152 lines
No EOL
6.9 KiB
C#
#region --- License ---
|
|
/* Licensed under the MIT/X11 license.
|
|
* Copyright (c) 2006-2008 the OpenTK Team.
|
|
* This notice may not be removed from any source distribution.
|
|
* See license.txt for licensing details.
|
|
*/
|
|
#endregion
|
|
|
|
// TODO: Find paint program that can properly export 8/16-bit Textures and make sure they are loaded correctly.
|
|
|
|
using System;
|
|
using System.Diagnostics;
|
|
using System.Drawing;
|
|
using System.Drawing.Imaging;
|
|
|
|
using OpenTK;
|
|
using OpenTK.Graphics;
|
|
using OpenTK.Graphics.OpenGL;
|
|
|
|
namespace Examples.TextureLoaders
|
|
{
|
|
class ImageGDI
|
|
{
|
|
|
|
public static void LoadFromDisk( string filename, out uint texturehandle, out TextureTarget dimension )
|
|
{
|
|
dimension = (TextureTarget) 0;
|
|
texturehandle = TextureLoaderParameters.OpenGLDefaultTexture;
|
|
ErrorCode GLError = ErrorCode.NoError;
|
|
|
|
Bitmap CurrentBitmap = null;
|
|
|
|
try // Exceptions will be thrown if any Problem occurs while working on the file.
|
|
{
|
|
CurrentBitmap = new Bitmap( filename );
|
|
if ( TextureLoaderParameters.FlipImages )
|
|
CurrentBitmap.RotateFlip( RotateFlipType.RotateNoneFlipY );
|
|
|
|
if ( CurrentBitmap.Height > 1 )
|
|
dimension = TextureTarget.Texture2D;
|
|
else
|
|
dimension = TextureTarget.Texture1D;
|
|
|
|
GL.GenTextures( 1, out texturehandle );
|
|
GL.BindTexture( dimension, texturehandle );
|
|
|
|
#region Load Texture
|
|
OpenTK.Graphics.OpenGL.PixelInternalFormat pif;
|
|
OpenTK.Graphics.OpenGL.PixelFormat pf;
|
|
OpenTK.Graphics.OpenGL.PixelType pt;
|
|
|
|
if (TextureLoaderParameters.Verbose)
|
|
Trace.WriteLine( "File: " + filename + " Format: " + CurrentBitmap.PixelFormat );
|
|
|
|
switch ( CurrentBitmap.PixelFormat )
|
|
{
|
|
case System.Drawing.Imaging.PixelFormat.Format8bppIndexed: // misses glColorTable setup
|
|
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgb8;
|
|
pf = OpenTK.Graphics.OpenGL.PixelFormat.ColorIndex;
|
|
pt = OpenTK.Graphics.OpenGL.PixelType.Bitmap;
|
|
break;
|
|
case System.Drawing.Imaging.PixelFormat.Format16bppArgb1555:
|
|
case System.Drawing.Imaging.PixelFormat.Format16bppRgb555: // does not work
|
|
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgb5A1;
|
|
pf = OpenTK.Graphics.OpenGL.PixelFormat.Bgr;
|
|
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedShort5551Ext;
|
|
break;
|
|
/* case System.Drawing.Imaging.PixelFormat.Format16bppRgb565:
|
|
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.R5G6B5IccSgix;
|
|
pf = OpenTK.Graphics.OpenGL.PixelFormat.R5G6B5IccSgix;
|
|
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
|
|
break;
|
|
*/
|
|
case System.Drawing.Imaging.PixelFormat.Format24bppRgb: // works
|
|
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgb8;
|
|
pf = OpenTK.Graphics.OpenGL.PixelFormat.Bgr;
|
|
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
|
|
break;
|
|
case System.Drawing.Imaging.PixelFormat.Format32bppRgb: // has alpha too? wtf?
|
|
case System.Drawing.Imaging.PixelFormat.Canonical:
|
|
case System.Drawing.Imaging.PixelFormat.Format32bppArgb: // works
|
|
pif = OpenTK.Graphics.OpenGL.PixelInternalFormat.Rgba;
|
|
pf = OpenTK.Graphics.OpenGL.PixelFormat.Bgra;
|
|
pt = OpenTK.Graphics.OpenGL.PixelType.UnsignedByte;
|
|
break;
|
|
default:
|
|
throw new ArgumentException( "ERROR: Unsupported Pixel Format " + CurrentBitmap.PixelFormat );
|
|
}
|
|
|
|
BitmapData Data = CurrentBitmap.LockBits( new System.Drawing.Rectangle( 0, 0, CurrentBitmap.Width, CurrentBitmap.Height ), ImageLockMode.ReadOnly, CurrentBitmap.PixelFormat );
|
|
|
|
if ( Data.Height > 1 )
|
|
{ // image is 2D
|
|
if (TextureLoaderParameters.BuildMipmapsForUncompressed)
|
|
{
|
|
throw new Exception("Cannot build mipmaps, Glu is deprecated.");
|
|
// Glu.Build2DMipmap(dimension, (int)pif, Data.Width, Data.Height, pf, pt, Data.Scan0);
|
|
}
|
|
else
|
|
GL.TexImage2D(dimension, 0, pif, Data.Width, Data.Height, TextureLoaderParameters.Border, pf, pt, Data.Scan0);
|
|
} else
|
|
{ // image is 1D
|
|
if (TextureLoaderParameters.BuildMipmapsForUncompressed)
|
|
{
|
|
throw new Exception("Cannot build mipmaps, Glu is deprecated.");
|
|
// Glu.Build1DMipmap(dimension, (int)pif, Data.Width, pf, pt, Data.Scan0);
|
|
}
|
|
else
|
|
GL.TexImage1D(dimension, 0, pif, Data.Width, TextureLoaderParameters.Border, pf, pt, Data.Scan0);
|
|
}
|
|
|
|
GL.Finish( );
|
|
GLError = GL.GetError( );
|
|
if ( GLError != ErrorCode.NoError )
|
|
{
|
|
throw new ArgumentException( "Error building TexImage. GL Error: " + GLError );
|
|
}
|
|
|
|
CurrentBitmap.UnlockBits( Data );
|
|
#endregion Load Texture
|
|
|
|
#region Set Texture Parameters
|
|
GL.TexParameter( dimension, TextureParameterName.TextureMinFilter, (int) TextureLoaderParameters.MinificationFilter );
|
|
GL.TexParameter( dimension, TextureParameterName.TextureMagFilter, (int) TextureLoaderParameters.MagnificationFilter );
|
|
|
|
GL.TexParameter( dimension, TextureParameterName.TextureWrapS, (int) TextureLoaderParameters.WrapModeS );
|
|
GL.TexParameter( dimension, TextureParameterName.TextureWrapT, (int) TextureLoaderParameters.WrapModeT );
|
|
|
|
GL.TexEnv( TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (int) TextureLoaderParameters.EnvMode );
|
|
|
|
GLError = GL.GetError( );
|
|
if ( GLError != ErrorCode.NoError )
|
|
{
|
|
throw new ArgumentException( "Error setting Texture Parameters. GL Error: " + GLError );
|
|
}
|
|
#endregion Set Texture Parameters
|
|
|
|
return; // success
|
|
} catch ( Exception e )
|
|
{
|
|
dimension = (TextureTarget) 0;
|
|
texturehandle = TextureLoaderParameters.OpenGLDefaultTexture;
|
|
throw new ArgumentException( "Texture Loading Error: Failed to read file " + filename + ".\n" + e );
|
|
// return; // failure
|
|
} finally
|
|
{
|
|
CurrentBitmap = null;
|
|
}
|
|
}
|
|
|
|
}
|
|
} |