#extension GL_EXT_buffer_reference : require
#extension GL_EXT_scalar_block_layout : require
#extension GL_EXT_nonuniform_qualifier : require

#include "global.glsl"

layout(std430, buffer_reference, buffer_reference_align = 4) readonly buffer PositionBuffer
{
  vec3 positions[];
};

struct OtherData
{
  vec3 normal;
  vec3 tangent;
  vec2 uv;
};

layout(std430, buffer_reference, buffer_reference_align = 4) readonly buffer OtherDataBuffer
{
  OtherData other_data[];
};

layout(push_constant, std430) uniform constants
{
    mat4 local_to_world;
    PositionBuffer positions;
    OtherDataBuffer other_data;
    uint color_texture;
    uint color_sampler;
} PushConstants;

#if VERTEX_SHADER

// QUAD
vec2 positions[6] = vec2[](
    vec2(-1, -1),
    vec2(-1, 1),
    vec2(1, 1),

    vec2(1, 1),
    vec2(1, -1),
    vec2(-1, -1)
);

layout(location = 0) out vec2 OutUV;

void main() {
  PositionBuffer positions_ptr = PushConstants.positions;
  OtherDataBuffer other_data_ptr = PushConstants.other_data;

  OutUV = other_data_ptr.other_data[gl_VertexIndex].uv;

  gl_Position = vec4(positions_ptr.positions[gl_VertexIndex], 1.0) * PushConstants.local_to_world * Global.view.world_to_clip;
}

#endif

#if FRAGMENT_SHADER

layout(location = 0) in vec2 InUV;
layout(location = 0) out vec4 FragColor;

void main() {
  FragColor = vec4(1); // vec4(texture(sampler2D(global_textures2d[PushConstants.color_texture], global_samplers[PushConstants.color_sampler]), InUV).rgb, 1.0);
}

#endif