| // Copyright (c) 2021 The Khronos Group Inc. |
| // Copyright (c) 2021 Valve Corporation |
| // Copyright (c) 2021 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. |
| // |
| // * Author: Tony Barbour <tony@lunarg.com> |
| // |
| |
| #version 450 |
| #define VAL_OUT_RECORD_SZ 10 |
| #extension GL_GOOGLE_include_directive : enable |
| #include "gpu_pre_draw_constants.h" |
| |
| #define countLimit push_constant_word_0 |
| #define maxWrites push_constant_word_1 |
| #define countOffset push_constant_word_2 |
| |
| #define draw_count push_constant_word_1 |
| #define first_instance_offset push_constant_word_2 |
| #define draw_stride push_constant_word_3 |
| |
| layout(set = 0, binding = 0) buffer OutputBuffer { |
| uint count; |
| uint data[]; |
| } Output; |
| layout(set = 0, binding = 1) buffer CountBuffer { uint data[]; } Count; |
| layout(set = 0, binding = 1) buffer DrawBuffer { uint data[]; } Draws; |
| layout(push_constant) uniform ufoo { |
| uint push_constant_word_0; |
| uint push_constant_word_1; |
| uint push_constant_word_2; |
| uint push_constant_word_3; |
| } u_info; |
| void valErrorOut(uint error, uint count) { |
| uint vo_idx = atomicAdd(Output.count, VAL_OUT_RECORD_SZ); |
| if (vo_idx + VAL_OUT_RECORD_SZ > Output.data.length()) |
| return; |
| Output.data[vo_idx + _kInstValidationOutError] = _kInstErrorPreDrawValidate; |
| Output.data[vo_idx + _kInstValidationOutError + 1] = error; |
| Output.data[vo_idx + _kInstValidationOutError + 2] = count; |
| } |
| void main() { |
| if (gl_VertexIndex == 0) { |
| if (u_info.countLimit > 0) { |
| // Validate count buffer |
| uint countIn = Count.data[u_info.countOffset]; |
| if (countIn > u_info.maxWrites) { |
| valErrorOut(pre_draw_count_exceeds_bufsize_error, countIn); |
| } |
| else if (countIn > u_info.countLimit) { |
| valErrorOut(pre_draw_count_exceeds_limit_error, countIn); |
| } |
| } else { |
| // Validate firstInstances |
| uint fi_index = u_info.first_instance_offset; |
| for (uint i = 0; i < u_info.draw_count; i++) { |
| if (Draws.data[fi_index] != 0) { |
| valErrorOut(pre_draw_first_instance_error, i); |
| break; |
| } |
| fi_index += u_info.draw_stride; |
| } |
| } |
| } |
| } |