forked from OpenRA/OpenRA
/
Texture.cs
129 lines (113 loc) · 3.48 KB
/
Texture.cs
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#region Copyright & License Information
/*
* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
* This file is part of OpenRA, which is free software. It is made
* available to you under the terms of the GNU General Public License
* as published by the Free Software Foundation. For more information,
* see LICENSE.
*/
#endregion
using System.Drawing;
using System.Drawing.Imaging;
using OpenRA.FileFormats.Graphics;
using Tao.OpenGl;
using System.IO;
using System;
namespace OpenRA.Renderer.Glsl
{
public class Texture : ITexture
{
internal int texture;
public Texture(GraphicsDevice dev)
{
Gl.glGenTextures(1, out texture);
GraphicsDevice.CheckGlError();
}
public Texture(GraphicsDevice dev, Bitmap bitmap)
{
Gl.glGenTextures(1, out texture);
GraphicsDevice.CheckGlError();
SetData(bitmap);
}
void PrepareTexture()
{
GraphicsDevice.CheckGlError();
Gl.glBindTexture(Gl.GL_TEXTURE_2D, texture);
GraphicsDevice.CheckGlError();
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_NEAREST);
GraphicsDevice.CheckGlError();
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_NEAREST);
GraphicsDevice.CheckGlError();
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_BASE_LEVEL, 0);
GraphicsDevice.CheckGlError();
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAX_LEVEL, 0);
GraphicsDevice.CheckGlError();
}
public void SetData(byte[] colors, int width, int height)
{
if (!IsPowerOf2(width) || !IsPowerOf2(height))
throw new InvalidDataException("Non-power-of-two array {0}x{1}".F(width, height));
unsafe
{
fixed (byte* ptr = &colors[0])
{
IntPtr intPtr = new IntPtr((void*)ptr);
PrepareTexture();
Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, width, height,
0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, intPtr);
GraphicsDevice.CheckGlError();
}
}
}
// An array of RGBA
public void SetData(uint[,] colors)
{
int width = colors.GetUpperBound(1) + 1;
int height = colors.GetUpperBound(0) + 1;
if (!IsPowerOf2(width) || !IsPowerOf2(height))
throw new InvalidDataException("Non-power-of-two array {0}x{1}".F(width,height));
unsafe
{
fixed (uint* ptr = &colors[0,0])
{
IntPtr intPtr = new IntPtr((void *) ptr);
PrepareTexture();
Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, width, height,
0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, intPtr);
GraphicsDevice.CheckGlError();
}
}
}
public void SetData(Bitmap bitmap)
{
if (!IsPowerOf2(bitmap.Width) || !IsPowerOf2(bitmap.Height))
{
//throw new InvalidOperationException( "non-power-of-2-texture" );
bitmap = new Bitmap(bitmap, new Size(NextPowerOf2(bitmap.Width), NextPowerOf2(bitmap.Height)));
}
var bits = bitmap.LockBits(
new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
PrepareTexture();
Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, bits.Width, bits.Height,
0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, bits.Scan0); // todo: weird strides
GraphicsDevice.CheckGlError();
bitmap.UnlockBits(bits);
}
bool IsPowerOf2(int v)
{
return (v & (v - 1)) == 0;
}
int NextPowerOf2(int v)
{
--v;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
++v;
return v;
}
}
}