HD4000 Bug

gistfile1.cpp

// Create a texture and bind it to two FBOs
GLuint textureName;
glGenTextures(1, &textureName); 
glBindTexture(GL_TEXTURE_RECTANGLE, textureName); 
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); 

GLuint fboNames[2];
glGenFramebuffers(2, fboNames); 
glBindFramebuffer(GL_FRAMEBUFFER, fboNames[0]); 
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_RECTANGLE, textureName, 0); 

glBindFramebuffer(GL_FRAMEBUFFER, fboNames[1]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_RECTANGLE, textureName, 0);

glBindTexture(GL_TEXTURE_RECTANGLE, textureName); 
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); 

glBindFramebuffer(GL_FRAMEBUFFER, fboNames[0]); 

// Removing this line resolves the error
glCheckFramebufferStatus(GL_FRAMEBUFFER); // Returns GL_FRAMEBUFFER_COMPLETE

glBindFramebuffer(GL_FRAMEBUFFER, fboNames[1]);
GLenum bufferTarget = GL_COLOR_ATTACHMENT0;
glDrawBuffers(1, &bufferTarget);

// Adding this line resolves the error 
// glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_RECTANGLE, 1, 0); 

glCheckFramebufferStatus(GL_FRAMEBUFFER); // Returns GL_FRAMEBUFFER_COMPLETE

//This call causes a GL_INVALID_FRAMEBUFFER_OPERATION error.
glClear(GL_COLOR_BUFFER_BIT);