#version 450

/* Copyright (c) 2021-2025, Arm Limited and Contributors
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 the "License";
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Downscale pass. Simple and naive :)

layout(local_size_x = 8, local_size_y = 8) in;

#include "blur_common.h"

const float SCALE = 1.75;

void main()
{
    if (all(lessThan(gl_GlobalInvocationID.xy, registers.resolution)))
    {
        vec2 uv = (vec2(gl_GlobalInvocationID.xy) + 0.5) * registers.inv_resolution;
        vec3 rgb = bloom_blur(uv, SCALE);
        imageStore(out_tex, ivec2(gl_GlobalInvocationID.xy), vec4(rgb, 1.0));
    }
}