我正在尝试加载并在屏幕上显示一个纹理,但是我正在接收一个黑色的盒子,以便显示它。
两个主要方法是“LoadTexture”和“Draw Image”,我假设错误就在其中一个。
using System;
using System.Diagnostics;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using System.Drawing;
using System.Drawing.Imaging;
namespace FailRender
{
public class FailRender: GameWindow
{
public FailRender() : base(800, 600, GraphicsMode.Default, "Hoard of Upgrades")
{
GL.ClearColor(0, 0.1f, 0.4f, 1);
texture = LoadTexture("sand.jpg");
}
private int texture;
public int LoadTexture(string file)
{
Bitmap bitmap = new Bitmap(file);
int tex;
GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);
GL.GenTextures(1, out tex);
GL.BindTexture(TextureTarget.Texture2D, tex);
BitmapData data = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, data.Width, data.Height, 0,
OpenTK.Graphics.OpenGL.PixelFormat.Rgba, PixelType.UnsignedByte, data.Scan0);
bitmap.UnlockBits(data);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
return tex;
}
public static void DrawImage(int image)
{
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
GL.LoadIdentity();
GL.Ortho(0, 800, 0, 600, -1, 1);
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
GL.LoadIdentity();
GL.Disable(EnableCap.Lighting);
GL.Enable(EnableCap.Texture2D);
GL.Color4(1, 0, 0, 1);
GL.BindTexture(TextureTarget.Texture2D, image);
GL.Begin(BeginMode.Quads);
GL.TexCoord2(0, 0);
GL.Vertex3(0, 0, 0);
GL.TexCoord2(1, 0);
GL.Vertex3(256, 0, 0);
GL.TexCoord2(1, 1);
GL.Vertex3(256, 256, 0);
GL.TexCoord2(0, 1);
GL.Vertex3(0, 256, 0);
GL.End();
GL.Disable(EnableCap.Texture2D);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Projection);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Modelview);
}
protected override void OnRenderFrame( FrameEventArgs e )
{
GL.Clear( ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit );
DrawImage(texture);
SwapBuffers();
}
}
public class Program
{
[STAThread]
public static void Main()
{
using (FailRender win = new FailRender())
{
win.Run();
}
}
}
}
答案 0 :(得分:5)
删除“GL.Color4(1,0,0,1);”
行并将加载纹理函数更改为:
public int LoadTexture(string file)
{
Bitmap bitmap = new Bitmap(file);
int tex;
GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);
GL.GenTextures(1, out tex);
GL.BindTexture(TextureTarget.Texture2D, tex);
BitmapData data = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, data.Width, data.Height, 0,
OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, data.Scan0);
bitmap.UnlockBits(data);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int) TextureMinFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int) TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int) TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int) TextureWrapMode.Repeat);
return tex;
}
修复了这个问题。 System.Drawing.PixelFormat.Argb
采用OpenGL格式Bgra
。