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

#include "global.glsl"

#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() {
  OutUV = positions[gl_VertexIndex] * 0.5 + 0.5;
  OutUV.y = 1 - OutUV.y;

  gl_Position = vec4(positions[gl_VertexIndex] + vec2(gl_InstanceIndex, 0), gl_InstanceIndex, 1.0) * Global.view.world_to_clip;
}

#endif

#if FRAGMENT_SHADER

layout(location = 0) in vec2 InUV;

layout(location = 0) out vec4 FragColor;

layout(push_constant, std430) uniform constants {
    uint color_texture;
    uint color_sampler;
} PushConstants;

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

#endif