public static void DrawQuad(Texture tex, float sx, float sy, float fx, float fy, float colorr = 1.0, float colorg = 1.0, float colorb = 1.0, float depth = 0.0, float alpha = 1.0, float tsx = 0.0, float tsy = 0.0, float tfx = 1.0, float tfy = 1.0)
{
check();
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, tex.Pointer);
GL.Color4(colorr, colorg, colorb, alpha);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Begin(BeginMode.Quads);
// Top-left!
GL.TexCoord2(tsx, tsy);
GL.Vertex3(sx, sy, depth);
// Top-right!
GL.TexCoord2(tfx, tsy);
GL.Vertex3(fx, sy, depth);
// Bottom-right!
GL.TexCoord2(tfx, tfy);
GL.Vertex3(fx, fy, depth);
// Bottom-left!
GL.TexCoord2(tsx, tfy);
GL.Vertex3(sx, fy, depth);
GL.End();
GL.Disable(EnableCap.Texture2D);
}
private void drawCursor(Texture t, int x, int y)
{
Graphics.DrawQuad(t, x, y, x + t.Width, y + t.Height);
}
public static void DestroyTexture(Texture tex)
{
check(true);
GL.DeleteTexture(tex.Pointer);
tex.Pointer = 0;
}
public static void UploadTexture(Texture tex, System.Drawing.Bitmap bitmap)
{
check(true);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, tex.Pointer);
lock (bitmap)
{
BitmapData bd = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
// Actually upload the data.
GL.TexImage2D(TextureTarget.Texture2D, 0, (int)PixelInternalFormat.Rgba8, bd.Width, bd.Height,
0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bd.Scan0);
bitmap.UnlockBits(bd);
}
GL.Disable(EnableCap.Texture2D);
}
