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// Copyright 2019 The Android Open Source Project
//
// 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.
#version 450
#include "Etc2ShaderLib.comp"
layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
layout(push_constant) uniform ImageFormatBlock {
uint compFormat;
uint baseLayer;
}
u_pushConstant;
layout(binding = 0, rgba32ui) readonly uniform WITH_TYPE(uimage) u_image0;
layout(binding = 1, rg16_snorm) writeonly uniform WITH_TYPE(image) u_image1;
void main(void) {
ivec3 pos = ivec3(gl_GlobalInvocationID.xyz);
pos.z += int(u_pushConstant.baseLayer);
uvec4 srcBlock = imageLoad(u_image0, WITH_TYPE(getPos)(pos));
float[16] decompressedR =
eac_decode_single_channel_block_float(flip32(srcBlock[0]), flip32(srcBlock[1]), true);
float[16] decompressedG =
eac_decode_single_channel_block_float(flip32(srcBlock[2]), flip32(srcBlock[3]), true);
for (int y = 0; y < WITH_TYPE(BLOCK_Y_SIZE_); y++) {
for (int x = 0; x < 4; x++) {
imageStore(u_image1, WITH_TYPE(getPos)(ivec3(pos.xy * 4 + ivec2(x, y), pos.z)),
vec4(decompressedR[y * 4 + x], decompressedG[y * 4 + x], 0, 1));
}
}
}
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