///<param name="filename">Note that filename is required even if passing a byte[], because filename is used as the key to identify duplicate textures</param>
///<param name="source">Whether to load the texture from file path, from an embedded resource in the entry assembly, or from 'textureBytes'</param>
///<param name="textureBytes">Used only if source == TextureLoadSource.FromByteArray</param>
public static Surface Create(GLWindow window, string texture_filename, TextureMinFilter minFilter, TextureMagFilter magFilter,
TextureLoadSource source, byte[] textureBytes, string frag_shader, bool has_depth, params int[] vertex_attrib_counts)
{
Surface s = new Surface();
s.window = window;
int dims = has_depth? 3 : 2;
s.UseDepthBuffer = has_depth;
VertexAttributes attribs = VertexAttributes.Create(vertex_attrib_counts);
s.vbo = VBO.Create(dims, attribs);
s.texture = Texture.Create(texture_filename, null, minFilter, magFilter, source, textureBytes);
s.shader = Shader.Create(frag_shader);
if (window != null)
{
window.Surfaces.Add(s);
}
return(s);
}
protected void LoadTexture(string filename, string filenameOfTextureToReplace = null, TextureMinFilter minFilter = TextureMinFilter.Nearest,
TextureMagFilter magFilter = TextureMagFilter.Nearest, TextureLoadSource source = TextureLoadSource.FromFilePath, byte[] textureBytes = null)
{
if (String.IsNullOrEmpty(filename))
{
throw new ArgumentException(filename);
}
if (texture_info.ContainsKey(filename))
{
Texture t = texture_info[filename];
TextureIndex = t.TextureIndex;
TextureHeightPx = t.TextureHeightPx;
TextureWidthPx = t.TextureWidthPx;
}
else
{
int num;
if (filenameOfTextureToReplace != null && texture_info.ContainsKey(filenameOfTextureToReplace))
{
num = texture_info[filenameOfTextureToReplace].TextureIndex;
texture_info.Remove(filenameOfTextureToReplace);
}
else
{
if (max_textures == -1)
{
GL.GetInteger(GetPName.MaxTextureImageUnits, out max_textures);
}
num = next_texture++;
if (num == max_textures) //todo: eventually fix this
{
throw new NotSupportedException("This machine only supports " + num + " texture units, and this GL code isn't smart enough to switch them out yet, sorry.");
}
}
GL.ActiveTexture(TextureUnit.Texture0 + num);
int id = GL.GenTexture(); //todo: eventually i'll want to support more than 16 or 32 textures. At that time I'll need to store this ID somewhere.
GL.BindTexture(TextureTarget.Texture2D, id); //maybe a list of Scenes which are lists of textures needed, and then i'll bind all those and make sure to track their texture units.
Bitmap bmp;
if (source == TextureLoadSource.FromEmbedded)
{
bmp = new Bitmap(Assembly.GetEntryAssembly().GetManifestResourceStream(filename));
}
else if (source == TextureLoadSource.FromByteArray)
{
if (textureBytes == null)
{
throw new ArgumentNullException(nameof(textureBytes));
}
using (System.IO.MemoryStream ms = new System.IO.MemoryStream(textureBytes)){
bmp = new Bitmap(ms);
}
}
else
{
bmp = new Bitmap(filename);
}
BitmapData bmp_data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, bmp_data.Width, bmp_data.Height, 0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bmp_data.Scan0);
bmp.UnlockBits(bmp_data);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)minFilter);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)magFilter);
TextureIndex = num;
TextureHeightPx = bmp.Height;
TextureWidthPx = bmp.Width;
Texture t = new Texture(); //this one goes into the dictionary as an easy way to store the index/height/width of this filename.
t.TextureIndex = num;
t.TextureHeightPx = bmp.Height;
t.TextureWidthPx = bmp.Width;
texture_info.Add(filename, t);
}
}
protected static Dictionary <string, Texture> texture_info = new Dictionary <string, Texture>(); //the Textures contained herein are used only to store index/height/width
///<param name="filename">Note that filename is required even if passing a byte[], because filename is used as the key to identify duplicate textures</param>
///<param name="textureBytes">Used only if source == TextureLoadSource.FromByteArray</param>
public static Texture Create(string filename, string filenameOfTextureToReplace = null, TextureMinFilter minFilter = TextureMinFilter.Nearest,
TextureMagFilter magFilter = TextureMagFilter.Nearest, TextureLoadSource source = TextureLoadSource.FromFilePath, byte[] textureBytes = null)
{
Texture t = new Texture();
t.Sprite = new List <SpriteType>();
t.LoadTexture(filename, filenameOfTextureToReplace, minFilter, magFilter, source, textureBytes);
return(t);
}
