130 lines
3.5 KiB
C#
130 lines
3.5 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see LICENSE.
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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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using System.IO;
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using System;
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namespace OpenRA.Renderer.Glsl
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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)
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{
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Gl.glGenTextures(1, out texture);
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GraphicsDevice.CheckGlError();
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}
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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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void PrepareTexture()
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{
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GraphicsDevice.CheckGlError();
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Gl.glBindTexture(Gl.GL_TEXTURE_2D, texture);
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GraphicsDevice.CheckGlError();
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Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_NEAREST);
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GraphicsDevice.CheckGlError();
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Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_NEAREST);
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GraphicsDevice.CheckGlError();
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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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}
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public void SetData(byte[] colors, int width, int height)
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{
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if (!IsPowerOf2(width) || !IsPowerOf2(height))
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throw new InvalidDataException("Non-power-of-two array {0}x{1}".F(width, height));
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unsafe
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{
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fixed (byte* ptr = &colors[0])
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{
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IntPtr intPtr = new IntPtr((void*)ptr);
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PrepareTexture();
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Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, width, height,
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0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, intPtr);
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GraphicsDevice.CheckGlError();
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}
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}
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}
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// An array of RGBA
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public void SetData(uint[,] colors)
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{
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int width = colors.GetUpperBound(1) + 1;
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int height = colors.GetUpperBound(0) + 1;
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if (!IsPowerOf2(width) || !IsPowerOf2(height))
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throw new InvalidDataException("Non-power-of-two array {0}x{1}".F(width,height));
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unsafe
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{
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fixed (uint* ptr = &colors[0,0])
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{
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IntPtr intPtr = new IntPtr((void *) ptr);
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PrepareTexture();
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Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, width, height,
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0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, intPtr);
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GraphicsDevice.CheckGlError();
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}
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}
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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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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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PrepareTexture();
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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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