// DEFINES

#define OIT_LAYERS 16

#define IMG_MAX 100
#define BUF_MAX 25
#define UNI_MAX 50

// SPEC CONSTANTS

layout (constant_id = 0) const bool ALBEDO_TEX   = false;
layout (constant_id = 1) const bool AMBIENT_TEX  = false;
layout (constant_id = 2) const bool SPECULAR_TEX = false;
layout (constant_id = 3) const bool ALPHA_TEX    = false;

// SET 0

layout (rgba16f, set = 0, binding = 0) uniform image2D DrawImage;
layout (         set = 0, binding = 1) uniform sampler SamplerNearest;

// SET 1

layout (set = 1, binding = 0)         uniform Globals {
	mat4 view;
	mat4 projection;
	vec4 light_color;
	vec4 ambient_color;
	vec3 light_direction;
	vec2 res;
} G;
layout (set = 1, binding = 1, rg32ui) uniform coherent uimageBuffer ImageABuffer;
layout (set = 1, binding = 2, r32ui)  uniform coherent uimage2D ImageAux;

// SET 2

layout (set = 2, binding = 0) uniform texture2D AlbedoTex;
layout (set = 2, binding = 1) uniform texture2D AmbientTex;
layout (set = 2, binding = 2) uniform texture2D SpecularTex;
layout (set = 2, binding = 3) uniform texture2D AlphaTex;
layout (set = 2, binding = 4) uniform MaterialData {
	vec4  ambient;
	vec4  diffuse;
	vec4  specular;
	float shininess;
	float alpha;
} Material;

layout (set = 3, binding = 0) uniform ModelState {
	mat4 model_matrix;
} State; 

// PUSH CONSTANTS

layout (push_constant) uniform PushConstants {
	uint t0; 
	uint t1;
	uint t2;
	uint t3;
	uint m0;
	uint s0;
} PC;

// ALIAS MACROS

#define ModelMatrix    State.model_matrix
#define ModelAmbient   Material.ambient
#define ModelDiffuse   Material.diffuse
#define ModelSpecular  Material.specular
#define ModelShininess Material.shininess
#define ModelAlpha     Material.alpha