WebGLState constructor

WebGLState(dynamic gl, WebGLExtensions extensions, WebGLCapabilities capabilities)

Implementation

WebGLState(this.gl, this.extensions, this.capabilities) {
  isWebGL2 = capabilities.isWebGL2;

  colorBuffer = ColorBuffer(gl);
  depthBuffer = DepthBuffer(gl);
  stencilBuffer = StencilBuffer(gl);

  colorBuffer.enable = enable;
  colorBuffer.disable = disable;

  depthBuffer.enable = enable;
  depthBuffer.disable = disable;

  stencilBuffer.enable = enable;
  stencilBuffer.disable = disable;

  maxTextures = gl.getParameter(gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS);
  emptyTextures[gl.TEXTURE_2D] =
      createTexture(gl.TEXTURE_2D, gl.TEXTURE_2D, 1);
  emptyTextures[gl.TEXTURE_CUBE_MAP] =
      createTexture(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_CUBE_MAP_POSITIVE_X, 6);

  // init

  colorBuffer.setClear(0, 0, 0, 1, false);
  depthBuffer.setClear(1);
  stencilBuffer.setClear(0);

  enable(gl.DEPTH_TEST);
  depthBuffer.setFunc(LessEqualDepth);

  setFlipSided(false);
  setCullFace(CullFaceBack);
  enable(gl.CULL_FACE);

  setBlending(NoBlending, null, null, null, null, null, null, false);

  equationToGL = {
    AddEquation: gl.FUNC_ADD,
    SubtractEquation: gl.FUNC_SUBTRACT,
    ReverseSubtractEquation: gl.FUNC_REVERSE_SUBTRACT
  };

  equationToGL[MinEquation] = gl.MIN;
  equationToGL[MaxEquation] = gl.MAX;

  factorToGL = {
    ZeroFactor: gl.ZERO,
    OneFactor: gl.ONE,
    SrcColorFactor: gl.SRC_COLOR,
    SrcAlphaFactor: gl.SRC_ALPHA,
    SrcAlphaSaturateFactor: gl.SRC_ALPHA_SATURATE,
    DstColorFactor: gl.DST_COLOR,
    DstAlphaFactor: gl.DST_ALPHA,
    OneMinusSrcColorFactor: gl.ONE_MINUS_SRC_COLOR,
    OneMinusSrcAlphaFactor: gl.ONE_MINUS_SRC_ALPHA,
    OneMinusDstColorFactor: gl.ONE_MINUS_DST_COLOR,
    OneMinusDstAlphaFactor: gl.ONE_MINUS_DST_ALPHA
  };

  scissorParam = gl.getParameter(gl.SCISSOR_BOX);
  viewportParam = gl.getParameter(gl.VIEWPORT);

  // currentScissor = new Vector4.init().fromArray( scissorParam );
  // currentViewport = new Vector4.init().fromArray( viewportParam );

  currentScissor = Vector4.init();
  currentViewport = Vector4.init();
}