private static GLShader GetShader(WebGLContext gl, string id)
{
var shaderScript = Element.GetById(id);
var str = shaderScript.TextContent;
if (str == "" || str == null)
{
var k = shaderScript.FirstChild;
while (k != null)
{
if (k.NodeType == 3)
{
str += k.TextContent;
}
k = k.NextSibling;
}
}
GLShader shader;
if (shaderScript.GetAttributeValue("type") == "x-shader/x-fragment")
{
shader = gl.CreateShader(gl.FragmentShader);
}
else if (shaderScript.GetAttributeValue("type") == "x-shader/x-vertex")
{
shader = gl.CreateShader(gl.VertexShader);
}
else
{
return(null);
}
gl.ShaderSource(shader, str);
gl.CompileShader(shader);
if (!gl.GetShaderParameter(shader, gl.CompileStatus))
{
throw new Exception("Shader compilation failed");
}
return(shader);
}
private WebGLShader LoadShader(WebGLContext gl, ShaderType type, string source)
{
var shader = gl.CreateShader(type);
gl.ShaderSource(shader, source);
gl.CompileShader(shader);
if (!gl.GetShaderParameter <bool>(shader, ShaderParameter.COMPILE_STATUS))
{
string info = gl.GetShaderInfoLog(shader);
gl.DeleteShader(shader);
throw new Exception("An error occured while compiling the shader: " + info);
}
return(shader);
}
