Shader Preprocessor automatic uniform buffer layout fill

[Xenation]

When preprocessing a shader, for each uniform buffer layout, check for missing fields and add them. This can currently only be done for the global buffers.

Exemple

Expected fields:

• mat4x4 projectionMatrix
• mat4x4 viewMatrix
• ivec2 resolution
• uint sampleCount

Input code:

layout (std140, binding = 1) uniform Camera {
	ivec2 resolution;
	uint sampleCount;
};

Output code:

layout (std140, binding = 1) uniform Camera {
	mat4x4 projectionMatrix;
	mat4x4 viewMatrix;
	ivec2 resolution;
	uint sampleCount;
};