Shaders Mod Framebuffer

private static void setupFrameBuffer() {
        if (dfb != 0) {
            glDeleteFramebuffersEXT(dfb);
            glDeleteTextures(dfbDepthTextures);
            glDeleteTextures(dfbColorTextures);
        }

        dfb = glGenFramebuffersEXT();
        glGenTextures((IntBuffer)dfbDepthTextures.clear().limit(usedDepthBuffers));
        glGenTextures((IntBuffer)dfbColorTextures.clear().limit(MaxColorBuffers*2));
        //glGenTextures((IntBuffer)dfbColorTexturesAlt.clear().limit(usedColorBuffers));
        dfbDepthTextures.position(0);
        dfbColorTextures.position(0); dfbColorTextures.get(dfbColorTexturesA).position(0);

        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, dfb);
        glDrawBuffers(GL_NONE);
        glReadBuffer(GL_NONE);

        for (int i=0; i < usedDepthBuffers; ++i)
        {
            glBindTexture(GL_TEXTURE_2D, dfbDepthTextures.get(i));
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, renderWidth, renderHeight, 0, GL_DEPTH_COMPONENT, GL11.GL_FLOAT, (ByteBuffer)null);
        }

        glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, dfbDepthTextures.get(0), 0);
        glDrawBuffers(dfbDrawBuffers);
        glReadBuffer(GL_NONE);
        checkGLError("FT d");

        for (int i = 0; i < usedColorBuffers; ++i) {
            glBindTexture(GL_TEXTURE_2D, dfbColorTexturesA[i]);
//          glTexParameteri(GL11.GL_TEXTURE_2D, GL12.GL_TEXTURE_MAX_LEVEL, 0);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
            glTexImage2D(GL_TEXTURE_2D, 0, gbuffersFormat[i], renderWidth, renderHeight, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, (ByteBuffer)null);
            glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i, GL_TEXTURE_2D, dfbColorTexturesA[i], 0);
            checkGLError("FT c");
        }
        for (int i = 0; i < usedColorBuffers; ++i) {
            glBindTexture(GL_TEXTURE_2D, dfbColorTexturesA[MaxColorBuffers+i]);
//          glTexParameteri(GL11.GL_TEXTURE_2D, GL12.GL_TEXTURE_MAX_LEVEL, 0);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
            glTexImage2D(GL_TEXTURE_2D, 0, gbuffersFormat[i], renderWidth, renderHeight, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, (ByteBuffer)null);
            checkGLError("FT ca");
        }

        int status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);

        if (status==GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT)
        {
            printChatAndLogError("Failed framebuffer incomplete formats");
            for (int i = 0; i < usedColorBuffers; ++i) {
                glBindTexture(GL_TEXTURE_2D, dfbColorTextures.get(i));
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, renderWidth, renderHeight, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, (ByteBuffer)null);
                glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i, GL_TEXTURE_2D, dfbColorTextures.get(i), 0);
                checkGLError("FT c");
            }
            status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
            if (status == GL_FRAMEBUFFER_COMPLETE_EXT) {
                SMCLog.info("complete");
            }
        }

        glBindTexture(GL_TEXTURE_2D, 0);

        if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
            printChatAndLogError("Failed creating framebuffer! (Status " + status + ")");
        } else {
            SMCLog.info("Framebuffer created.");
        }
    }

    private static void setupShadowFrameBuffer() {
        if (usedShadowDepthBuffers == 0) {
            return;
        }

        if (sfb != 0) {
            glDeleteFramebuffersEXT(sfb);
            glDeleteTextures(sfbDepthTextures);
            glDeleteTextures(sfbColorTextures);
        }

        sfb = glGenFramebuffersEXT();
        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, sfb);
        glDrawBuffers(drawBuffersNone);
        glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);

        glGenTextures((IntBuffer)sfbDepthTextures.clear().limit(usedShadowDepthBuffers));
        glGenTextures((IntBuffer)sfbColorTextures.clear().limit(usedShadowColorBuffers));
        //printIntBuffer(sfbDepthTextures);
        //printIntBuffer(sfbColorTextures);
        sfbDepthTextures.position(0); sfbColorTextures.position(0);

        // depth
        for (int i=0; i < usedShadowDepthBuffers; ++i)
        {
            glBindTexture(GL_TEXTURE_2D, sfbDepthTextures.get(i));
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
            int filter = shadowFilterNearest[i]? GL_NEAREST : GL_LINEAR;
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
            if (shadowHardwareFilteringEnabled[i])
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, shadowMapWidth, shadowMapHeight, 0, GL_DEPTH_COMPONENT, GL11.GL_FLOAT, (FloatBuffer)null);
        }
        glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, sfbDepthTextures.get(0), 0);
        checkGLError("FT sd");

        // color shadow
        for (int i=0; i < usedShadowColorBuffers; ++i) {
            glBindTexture(GL_TEXTURE_2D, sfbColorTextures.get(i));
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
            int filter = shadowColorFilterNearest[i]? GL_NEAREST : GL_LINEAR;
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, shadowMapWidth, shadowMapHeight, 0, GL12.GL_BGRA, GL12.GL_UNSIGNED_INT_8_8_8_8_REV, (ByteBuffer)null);
            glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i, GL_TEXTURE_2D, sfbColorTextures.get(i), 0);
            checkGLError("FT sc");
        }

        glBindTexture(GL_TEXTURE_2D, 0);

        int status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
        if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
            printChatAndLogError("Failed creating shadow framebuffer! (Status " + status + ")");
        } else {
            SMCLog.info("Shadow framebuffer created.");
        }
    }