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What is uniform buffer object?
A Buffer Object that is used to store uniform data for a shader program is called a Uniform Buffer Object. They can be used to share uniforms between different programs, as well as quickly change between sets of uniforms for the same program object.
What is a SSBO?
A Shader Storage Buffer Object is a Buffer Object that is used to store and retrieve data from within the OpenGL Shading Language. SSBOs are a lot like Uniform Buffer Objects. Buffer objects that store SSBOs are bound to SSBO binding points, just as buffer objects for uniforms are bound to UBO binding points.
Where are the binding points for uniform buffers?
The context has GL_MAX_UNIFORM_BUFFER_BINDINGS binding locations for uniform buffers. This value is usually the sum of the maximum uniform block count for all 3 possible stages. This list of uniform binding locations is analogous to the set of texture image unit binding points.
How are Buffer objects associated with uniform blocks?
Buffer objects are associated with a program’s uniform block similarly to the way that texture objects are associated with sampler uniforms. The context has GL_MAX_UNIFORM_BUFFER_BINDINGS binding locations for uniform buffers. This value is usually the sum of the maximum uniform block count for all 3 possible stages.
How to create uniform Buffer object in OpenGL?
OpenGL gives you an option to have one UBO, parts of which are bound to several binding points. But we don’t need this in this tutorial at all . Now that binding points are ready, we just have to connect uniform blocks in shader programs with the binding points. This also has to be set up only once during initialization.
How is a uniform buffer bound in GLSL?
A uniform buffer in GLSL has a block index which ultimately is associated with a buffer binding index, to which a buffer object is bound. But there are too many differences in the details of these things to try to form any kind of structural basis for treating these constructs the same way in a formalized object.