Method createVertShader

src/main/java/net/optifine/shaders/Shaders.java:2602–2704

(Program program, String filename)

    }

    private static int createVertShader(Program program, String filename)
    {
        int i = ARBShaderObjects.glCreateShaderObjectARB(ARBVertexShader.GL_VERTEX_SHADER_ARB);

        if (i == 0)
        {
            return 0;
        }
        else
        {
            StringBuilder stringbuilder = new StringBuilder(131072);
            BufferedReader bufferedreader = null;

            try
            {
                bufferedreader = new BufferedReader(getShaderReader(filename));
            }
            catch (Exception var10)
            {
                ARBShaderObjects.glDeleteObjectARB(i);
                return 0;
            }

            ShaderOption[] ashaderoption = getChangedOptions(shaderPackOptions);
            List<String> list = new ArrayList();

            if (bufferedreader != null)
            {
                try
                {
                    bufferedreader = ShaderPackParser.resolveIncludes(bufferedreader, filename, shaderPack, 0, list, 0);
                    MacroState macrostate = new MacroState();

                    while (true)
                    {
                        String s = bufferedreader.readLine();

                        if (s == null)
                        {
                            bufferedreader.close();
                            break;
                        }

                        s = applyOptions(s, ashaderoption);
                        stringbuilder.append(s).append('\n');

                        if (macrostate.processLine(s))
                        {
                            ShaderLine shaderline = ShaderParser.parseLine(s);

                            if (shaderline != null)
                            {
                                if (shaderline.isAttribute("mc_Entity"))
                                {
                                    useEntityAttrib = true;
                                    progUseEntityAttrib = true;
                                }
                                else if (shaderline.isAttribute("mc_midTexCoord"))