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// Copyright (c) 2021-2025 The Khronos Group Inc.
// Copyright (c) 2021-2025 Valve Corporation
// Copyright (c) 2021-2025 LunarG, Inc.
//
// 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
#extension GL_GOOGLE_include_directive : enable
#include "common.h"
#include "push_data.h"
layout (push_constant) uniform UniformInfo {
DrawMeshPushData pc;
};
/*
Matching Struct from the API
struct VkDrawMeshTasksIndirectCommandEXT {
uint32_t groupCountX;
uint32_t groupCountY;
uint32_t groupCountZ;
};
*/
const uint kGroupCountX = 0;
const uint kGroupCountY = 1;
const uint kGroupCountZ = 2;
layout(set = kValPipeDescSet, binding = kPreDrawBinding_IndirectBuffer)
readonly buffer DrawBuffer {
uint draw_buffer[];
};
layout(set = kValPipeDescSet, binding = kPreDrawBinding_CountBuffer)
readonly buffer CountBuffer {
uint count_buffer[];
};
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
void main() {
const uint draw_i = gl_GlobalInvocationID.x;
if ((pc.flags & kDrawMeshFlags_DrawCountFromBuffer) != 0) {
// Need to clamp draw count value stored in count buffer to the maxDrawCount
// that was specified at vkCmdDrawIndexedIndirect time.
// pc.api_draw_count is used to store maxDrawCount
const uint draw_count = min(count_buffer[pc.api_count_buffer_offset_dwords], pc.api_draw_count);
if (draw_i >= draw_count) return;
}
const uint draw_mesh_task_indirect_cmd_i = draw_i * pc.api_stride_dwords + pc.api_offset_dwords;
const uint x = draw_buffer[ draw_mesh_task_indirect_cmd_i + kGroupCountX ];
const uint y = draw_buffer[ draw_mesh_task_indirect_cmd_i + kGroupCountY ];
const uint z = draw_buffer[ draw_mesh_task_indirect_cmd_i + kGroupCountZ ];
if (x > pc.max_workgroup_count_x) {
GpuavLogError2(kErrorGroupGpuPreDraw, kErrorSubCodePreDrawGroupCountX, x, draw_i);
}
if (y > pc.max_workgroup_count_y) {
GpuavLogError2(kErrorGroupGpuPreDraw, kErrorSubCodePreDrawGroupCountY, y, draw_i);
}
if (z > pc.max_workgroup_count_z) {
GpuavLogError2(kErrorGroupGpuPreDraw, kErrorSubCodePreDrawGroupCountZ, z, draw_i);
}
const uint total = x * y * z;
if (total > pc.max_workgroup_total_count) {
GpuavLogError2(kErrorGroupGpuPreDraw, kErrorSubCodePreDrawGroupCountTotal, total, draw_i);
}
}
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