OpenGL Mutlisampling Multiple Render Target FBO's - opengl

Question

I am trying Deferred Shading and I am having troubles trying to MultiSample a Multiple Render Target. It Seems as if I am only copying over one anti-Aliased Texture instead of 3 (Diffuse,Position,Normals). Only the Diffuse are copied.
This is the Anti Alias FBO creation for my Geometry Pass:
IntBuffer drawBuffs = BufferUtils.createIntBuffer(3);
private void CreateFBOAntiAlias() {
AntiAliasFrameBuffer = glGenFramebuffers();
GL30.glBindFramebuffer(GL_FRAMEBUFFER, AntiAliasFrameBuffer);
textureColorMultiSampled = generateMultiSampleTexture(4);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL32.GL_TEXTURE_2D_MULTISAMPLE, textureColorMultiSampled,
0);
texturePositionMultiSampled = generateMultiSampleTexture(4);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1,
GL32.GL_TEXTURE_2D_MULTISAMPLE, texturePositionMultiSampled ,
0);
textureNormalMultiSampled = generateMultiSampleTexture(4);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2,
GL32.GL_TEXTURE_2D_MULTISAMPLE, textureNormalMultiSampled ,
0);
drawBuffs.put(0, GL30.GL_COLOR_ATTACHMENT0);
drawBuffs.put(1, GL30.GL_COLOR_ATTACHMENT1);
drawBuffs.put(2, GL30.GL_COLOR_ATTACHMENT2);
GL20.glDrawBuffers(drawBuffs);
AntiAliasRenderBufferObject = glGenRenderbuffers();
glBindRenderbuffer(GL_RENDERBUFFER, AntiAliasRenderBufferObject);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, 4,
GL_DEPTH24_STENCIL8, width, height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, AntiAliasRenderBufferObject);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
System.err
.println("ERROR::FRAMEBUFFER:: Framebuffer is not complete!");
} else {
System.err.println("FrameBuffer AntiAliasFBO success");
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
private int generateMultiSampleTexture(int samples) {
int texture;
texture = GL11.glGenTextures();
GL11.glBindTexture(GL32.GL_TEXTURE_2D_MULTISAMPLE, texture);
GL32.glTexImage2DMultisample(GL32.GL_TEXTURE_2D_MULTISAMPLE, samples,
GL11.GL_RGBA8, width, height, true);
GL11.glBindTexture(GL32.GL_TEXTURE_2D_MULTISAMPLE, 0);
return texture;
}
This is the creation for my Target FBO:
public void CreateFBO() {
fbo_handle = glGenFramebuffers();
diffuse_handle = GL11.glGenTextures();
position_handle = GL11.glGenTextures();
normal_handle = GL11.glGenTextures();
glBindFramebuffer(GL_FRAMEBUFFER, fbo_handle);
//////////////////DIFFUSE////////////////////////////////////
GL11.glBindTexture(GL11.GL_TEXTURE_2D, diffuse_handle);
GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, width, height,0,
GL11.GL_RGBA, GL11.GL_INT, (ByteBuffer) null);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL11.GL_TEXTURE_2D, diffuse_handle, 0);
/////////////////POSITION////////////////////////////////////
GL11.glBindTexture(GL11.GL_TEXTURE_2D, position_handle);
GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0,
GL11.GL_RGBA, GL11.GL_INT, (ByteBuffer) null);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1,
GL11.GL_TEXTURE_2D, position_handle, 0);
///////////////NORMALS/////////////////////////////////////////
GL11.glBindTexture(GL11.GL_TEXTURE_2D, normal_handle);
GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL_RGBA16F, width, height, 0,
GL11.GL_RGBA, GL11.GL_INT, (ByteBuffer) null);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2,
GL11.GL_TEXTURE_2D, normal_handle, 0);
//////////////////////////////////////////////////////////////////
drawBuffs.put(0, GL30.GL_COLOR_ATTACHMENT0);
drawBuffs.put(1, GL30.GL_COLOR_ATTACHMENT1);
drawBuffs.put(2, GL30.GL_COLOR_ATTACHMENT2);
GL20.glDrawBuffers(drawBuffs);
rbo_depth_buffer_handle = glGenRenderbuffers();
glBindRenderbuffer(GL_RENDERBUFFER, rbo_depth_buffer_handle);
glRenderbufferStorage(GL_RENDERBUFFER, GL14.GL_DEPTH_COMPONENT32,
width, height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, rbo_depth_buffer_handle);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
System.err.println("Framebuffer configuration error");
} else {
System.err.println("Deferred configuration Success");
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
I bind my AA FBO during the Geometry pass, unbind it and perform a Blit from the AA FBO to my Target FBO and Render the Fullscreen Quad with undesire results.
public void blit() {
GL11.glEnable(GL13.GL_MULTISAMPLE);
glBindFramebuffer(GL_READ_FRAMEBUFFER, AntiAliasFrameBuffer);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_handle);
glBlitFramebuffer(0, 0, width, height, 0, 0, width, height,
GL11.GL_COLOR_BUFFER_BIT, GL11.GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
Edit: I've tried blitting from a normal MRT fbo to another normal MRT FBO without the Multi-Sampling calls and again it seems i'm copying over just ONE texture. Rhe root of my problem is incorrectly blitting an MRT to another MRT.

Answer 1

Whew, ok My main problem was my blitting was incorrect. The blitting Method should be
public void blit() {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindFramebuffer(GL_READ_FRAMEBUFFER, AntiAliasFrameBuffer);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_handle);
GL11.glReadBuffer(GL_COLOR_ATTACHMENT0);
GL11.glDrawBuffer(GL_COLOR_ATTACHMENT0);
glBlitFramebuffer(0, 0, width, height, 0, 0, width, height,
GL11.GL_COLOR_BUFFER_BIT, GL11.GL_NEAREST);
GL11.glReadBuffer(GL_COLOR_ATTACHMENT1);
GL11.glDrawBuffer(GL_COLOR_ATTACHMENT1);
glBlitFramebuffer(0, 0, width, height, 0, 0, width, height,
GL11.GL_COLOR_BUFFER_BIT, GL11.GL_NEAREST);
GL11.glReadBuffer(GL_COLOR_ATTACHMENT2);
GL11.glDrawBuffer(GL_COLOR_ATTACHMENT2);
glBlitFramebuffer(0, 0, width, height, 0, 0, width, height,
GL11.GL_COLOR_BUFFER_BIT, GL11.GL_NEAREST);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
the general setup for my AA FBO/FBO is correct, and all textures are copied over successfully and with major improvement over Aliasing.