OpenGL 4 Shading Language Cookbook - Third Edition

Getting ready

Create a texture to store the results of our fractal calculation. The image should be bound to the image texture unit 0 using glBindImageTexture:

GLuint imgTex; 
glGenTextures(1, &imgTex); 
glActiveTexture(GL_TEXTURE0); 
glBindTexture(GL_TEXTURE_2D, imgTex); 
glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 256, 256);  glBindImageTexture(0, imgTex, 0, GL_FALSE, 0, GL_READ_WRITE,  
                   GL_RGBA8);