83 lines
2.4 KiB
C#
83 lines
2.4 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
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* This file is part of OpenRA.
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*
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* OpenRA is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* OpenRA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OpenRA. If not, see <http://www.gnu.org/licenses/>.
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*/
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#endregion
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using System.Drawing;
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using System.Drawing.Imaging;
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using OpenRA.FileFormats.Graphics;
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using Tao.OpenGl;
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namespace OpenRA.GlRenderer
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{
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public class Texture : ITexture
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{
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internal int texture;
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public Texture(GraphicsDevice dev, Bitmap bitmap)
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{
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Gl.glGenTextures(1, out texture);
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GraphicsDevice.CheckGlError();
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SetData(bitmap);
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}
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public void SetData(Bitmap bitmap)
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{
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if (!IsPowerOf2(bitmap.Width) || !IsPowerOf2(bitmap.Height))
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{
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//throw new InvalidOperationException( "non-power-of-2-texture" );
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bitmap = new Bitmap(bitmap, new Size(NextPowerOf2(bitmap.Width), NextPowerOf2(bitmap.Height)));
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}
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Gl.glBindTexture(Gl.GL_TEXTURE_2D, texture);
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GraphicsDevice.CheckGlError();
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var bits = bitmap.LockBits(
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new Rectangle(0, 0, bitmap.Width, bitmap.Height),
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ImageLockMode.ReadOnly,
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PixelFormat.Format32bppArgb);
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Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_BASE_LEVEL, 0);
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GraphicsDevice.CheckGlError();
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Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAX_LEVEL, 0);
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GraphicsDevice.CheckGlError();
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Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, bits.Width, bits.Height,
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0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, bits.Scan0); // todo: weird strides
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GraphicsDevice.CheckGlError();
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bitmap.UnlockBits(bits);
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}
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bool IsPowerOf2(int v)
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{
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return (v & (v - 1)) == 0;
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}
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int NextPowerOf2(int v)
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{
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--v;
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v |= v >> 1;
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v |= v >> 2;
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v |= v >> 4;
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v |= v >> 8;
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++v;
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return v;
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}
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}
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}
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