public async Task Initialize()
{
_context = await _canvasReference.CreateWebGLAsync(new WebGLContextAttributes
{
PowerPreference = WebGLContextAttributes.POWER_PREFERENCE_HIGH_PERFORMANCE
});
vertexBuffer = await _context.CreateBufferAsync();
await _context.BindBufferAsync(BufferType.ARRAY_BUFFER, vertexBuffer);
var program = await this.InitProgramAsync(this._context, VS_SOURCE, FS_SOURCE);
var positionLocation = await _context.GetAttribLocationAsync(program, "aPos");
var texcoordLocation = await _context.GetAttribLocationAsync(program, "aTex");
await _context.VertexAttribPointerAsync((uint)positionLocation, 3, DataType.FLOAT, false, 6 *sizeof(float), 0);
await _context.VertexAttribPointerAsync((uint)texcoordLocation, 2, DataType.FLOAT, false, 6 *sizeof(float), 3 *sizeof(float));
await _context.EnableVertexAttribArrayAsync((uint)positionLocation);
await _context.EnableVertexAttribArrayAsync((uint)texcoordLocation);
await _context.UseProgramAsync(program);
var texture = await _context.CreateTextureAsync();
await _context.BindTextureAsync(TextureType.TEXTURE_2D, texture);
}
public static async Task <Texture> BuildAsync(WebGLContext gl, int[] image, int width = 100, int height = 100)
{
var texture = await gl.CreateTextureAsync();
await gl.BindTextureAsync(TextureType.TEXTURE_2D, texture);
//TODO: Create a new version without width&height
await gl.TexImage2DAsync(Texture2DType.TEXTURE_2D, 0, PixelFormat.RGBA, width, height, 0, PixelFormat.RGBA, PixelType.UNSIGNED_BYTE, image);
// WebGL1 has different requirements for power of 2 images vs non power of 2 images
//if ((width & (width - 1)) == 0 && (height & (height - 1)) == 0)
//{
// await gl.GenerateMipmapAsync(TextureType.TEXTURE_2D);
//}
//else
//{
//await gl.TexParameterAsync(TextureType.TEXTURE_2D, TextureParameter.TEXTURE_MAG_FILTER, (int)TextureParameterValue.LINEAR);
await gl.TexParameterAsync(TextureType.TEXTURE_2D, TextureParameter.TEXTURE_MIN_FILTER, (int)TextureParameterValue.LINEAR);
await gl.TexParameterAsync(TextureType.TEXTURE_2D, TextureParameter.TEXTURE_WRAP_S, (int)TextureParameterValue.CLAMP_TO_EDGE);
await gl.TexParameterAsync(TextureType.TEXTURE_2D, TextureParameter.TEXTURE_WRAP_T, (int)TextureParameterValue.CLAMP_TO_EDGE);
return(new Texture(gl, texture, width, height));
}
