stephenseo/blue_noise_generation
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base: stephenseo:e35a7e8720a6f12bc610d1d464f99c3095c7418d
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stephenseo:main
stephenseo:dev_optimize2
stephenseo:dev
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compare: stephenseo:b88f3e9f4ce2e8b06eb0c0b2aecd69511bb85fe5
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stephenseo:dev_optimize2
stephenseo:dev
stephenseo:main

2 commits
e35a7e8720 ... b88f3e9f4c

Author SHA1 Message Date
Stephen Seo
b88f3e9f4c Cleanup unused code 
More cleanup of unused code.
 2024-04-12 13:24:53 +09:00
Stephen Seo
4dbae98e8f Cleanup unused code 
More cleanup of unused code.
 2024-04-12 13:08:05 +09:00
2 changed files with 1 additions and 429 deletions
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380
src/blue_noise.cpp
View file

@ -284,52 +284,6 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
std::vector<bool> pbp = random_noise(size, pixel_count);
bool reversed_pbp = false;
VkBuffer staging_pbp_buffer;
VkDeviceMemory staging_pbp_buffer_mem;
if (!internal::vulkan_create_buffer(device, phys_device, size * sizeof(int),
VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
VK_MEMORY_PROPERTY_HOST_CACHED_BIT,
staging_pbp_buffer,
staging_pbp_buffer_mem)) {
std::clog << "get_filter ERROR: Failed to create staging pbp buffer!\n";
return {};
}
utility::Cleanup cleanup_staging_pbp_buf(
[device](void *ptr) {
vkDestroyBuffer(device, *((VkBuffer *)ptr), nullptr);
},
&staging_pbp_buffer);
utility::Cleanup cleanup_staging_pbp_buf_mem(
[device](void *ptr) {
vkFreeMemory(device, *((VkDeviceMemory *)ptr), nullptr);
},
&staging_pbp_buffer_mem);
VkBuffer staging_filter_buffer;
VkDeviceMemory staging_filter_buffer_mem;
if (!internal::vulkan_create_buffer(device, phys_device, size * sizeof(int),
VK_BUFFER_USAGE_TRANSFER_DST_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
VK_MEMORY_PROPERTY_HOST_CACHED_BIT,
staging_filter_buffer,
staging_filter_buffer_mem)) {
std::clog << "get_filter ERROR: Failed to create staging pbp buffer!\n";
return {};
}
utility::Cleanup cleanup_staging_filter_buf(
[device](void *ptr) {
vkDestroyBuffer(device, *((VkBuffer *)ptr), nullptr);
},
&staging_filter_buffer);
utility::Cleanup cleanup_staging_filter_buf_mem(
[device](void *ptr) {
vkFreeMemory(device, *((VkDeviceMemory *)ptr), nullptr);
},
&staging_filter_buffer_mem);
std::vector<std::size_t> changed_indices;
VkDeviceSize phys_atom_size;
{
VkPhysicalDeviceProperties props;
@ -381,8 +335,6 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
pbp[max] = false;
changed_indices.push_back(max);
// get second buffer's min
int second_min;
vulkan_minmax_opt = vulkan_filter_and_minmax(
@ -399,11 +351,9 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
if (second_min == max) {
pbp[max] = true;
changed_indices.push_back(max);
break;
} else {
pbp[second_min] = true;
changed_indices.push_back(second_min);
}
#ifndef NDEBUG
@ -452,7 +402,6 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
std::tie(std::ignore, max) = vulkan_minmax_opt.value();
pbp.at(max) = false;
dither_array.at(max) = i;
changed_indices.push_back(max);
#ifndef NDEBUG
if (set.find(max) != set.end()) {
std::cout << "\nWARNING: Reusing index " << max << '\n';
@ -485,7 +434,6 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
std::tie(min, std::ignore) = vulkan_minmax_opt.value();
pbp.at(min) = true;
dither_array.at(min) = i;
changed_indices.push_back(min);
#ifndef NDEBUG
if (set.find(min) != set.end()) {
std::cout << "\nWARNING: Reusing index " << min << '\n';
@ -503,7 +451,6 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
std::cout << i << ' ';
#endif
if (first_reversed_run) {
changed_indices.clear();
first_reversed_run = false;
}
auto vulkan_minmax_opt = vulkan_filter_and_minmax(
@ -519,7 +466,6 @@ std::vector<unsigned int> dither::internal::blue_noise_vulkan_impl(
std::tie(std::ignore, max) = vulkan_minmax_opt.value();
pbp.at(max) = true;
dither_array.at(max) = i;
changed_indices.push_back(max);
#ifndef NDEBUG
if (set.find(max) != set.end()) {
std::cout << "\nWARNING: Reusing index " << max << '\n';
@ -566,10 +512,6 @@ std::optional<std::pair<int, int>> dither::internal::vulkan_filter_and_minmax(
}
}
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax Staging to max_in_buf...\n";
#endif
VkMappedMemoryRange range{};
{
range.sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
@ -586,10 +528,6 @@ std::optional<std::pair<int, int>> dither::internal::vulkan_filter_and_minmax(
vkResetCommandBuffer(command_buffer, 0);
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax begin command buffer...\n";
#endif
VkCommandBufferBeginInfo begin_info{};
begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
@ -599,9 +537,6 @@ std::optional<std::pair<int, int>> dither::internal::vulkan_filter_and_minmax(
return std::nullopt;
}
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax bind and dispatch filter...\n";
#endif
vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_COMPUTE,
filter_in_out_pipeline);
vkCmdBindDescriptorSets(command_buffer, VK_PIPELINE_BIND_POINT_COMPUTE,
@ -632,18 +567,10 @@ std::optional<std::pair<int, int>> dither::internal::vulkan_filter_and_minmax(
buf_mem_barriers[0].offset = 0;
buf_mem_barriers[0].size = VK_WHOLE_SIZE;
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax filter barrier...\n";
#endif
vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 1, &mem_barrier, 1,
buf_mem_barriers.data(), 0, nullptr);
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax copy buffer...\n";
#endif
{
VkBufferCopy copy_region{};
copy_region.size = sizeof(FloatAndIndex) * size;
@ -661,10 +588,6 @@ std::optional<std::pair<int, int>> dither::internal::vulkan_filter_and_minmax(
buf_mem_barriers[0].dstAccessMask =
VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_SHADER_WRITE_BIT;
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax max_in to min_in barrier...\n";
#endif
vkCmdPipelineBarrier(command_buffer, VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, 0, 1,
&mem_barrier, 1, buf_mem_barriers.data(), 0, nullptr);
@ -717,9 +640,6 @@ std::optional<std::pair<int, int>> dither::internal::vulkan_filter_and_minmax(
buf_mem_barriers[3].offset = 0;
buf_mem_barriers[3].size = VK_WHOLE_SIZE;
#ifndef NDEBUG
std::clog << "Vulkan filter_and_minmax begin minmax loop...\n";
#endif
while (current_size > 1) {
next_size = (current_size + 1) / 2;
@ -1110,57 +1030,6 @@ image::Bl dither::blue_noise(int width, int height, int threads,
internal::vulkan_find_queue_families(phys_device).computeFamily.value(),
0, &compute_queue);
VkDescriptorSetLayout compute_desc_set_layout;
utility::Cleanup compute_desc_set_layout_cleanup{};
{
std::array<VkDescriptorSetLayoutBinding, 4> compute_layout_bindings{};
compute_layout_bindings[0].binding = 0;
compute_layout_bindings[0].descriptorCount = 1;
compute_layout_bindings[0].descriptorType =
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
compute_layout_bindings[0].pImmutableSamplers = nullptr;
compute_layout_bindings[0].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
compute_layout_bindings[1].binding = 1;
compute_layout_bindings[1].descriptorCount = 1;
compute_layout_bindings[1].descriptorType =
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
compute_layout_bindings[1].pImmutableSamplers = nullptr;
compute_layout_bindings[1].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
compute_layout_bindings[2].binding = 2;
compute_layout_bindings[2].descriptorCount = 1;
compute_layout_bindings[2].descriptorType =
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
compute_layout_bindings[2].pImmutableSamplers = nullptr;
compute_layout_bindings[2].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
compute_layout_bindings[3].binding = 3;
compute_layout_bindings[3].descriptorCount = 1;
compute_layout_bindings[3].descriptorType =
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
compute_layout_bindings[3].pImmutableSamplers = nullptr;
compute_layout_bindings[3].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
VkDescriptorSetLayoutCreateInfo layout_info{};
layout_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
layout_info.bindingCount = compute_layout_bindings.size();
layout_info.pBindings = compute_layout_bindings.data();
if (vkCreateDescriptorSetLayout(device, &layout_info, nullptr,
&compute_desc_set_layout) != VK_SUCCESS) {
std::clog
<< "WARNING: Failed to create compute descriptor set layout!\n";
goto ENDOF_VULKAN;
}
compute_desc_set_layout_cleanup = utility::Cleanup(
[device](void *ptr) {
vkDestroyDescriptorSetLayout(
device, *((VkDescriptorSetLayout *)ptr), nullptr);
},
&compute_desc_set_layout);
}
VkDescriptorSetLayout filter_in_out_layout;
utility::Cleanup filter_in_out_layout_cleanup{};
{
@ -1275,33 +1144,10 @@ image::Bl dither::blue_noise(int width, int height, int threads,
// Check and compile compute shader.
{
std::array<const char *, 3> filenames{
"blue_noise.glsl", "src/blue_noise.glsl", "../src/blue_noise.glsl"};
bool success = false;
for (const auto filename : filenames) {
std::ifstream ifs(filename);
if (ifs.good()) {
ifs.close();
std::string command("glslc -fshader-stage=compute -o compute.spv ");
command.append(filename);
if (std::system(command.c_str()) != 0) {
std::clog << "WARNING: Failed to compile " << filename << "!\n";
goto ENDOF_VULKAN;
} else {
success = true;
break;
}
}
}
if (!success) {
std::clog << "WARNING: Could not find blue_noise.glsl!\n";
goto ENDOF_VULKAN;
}
std::array<const char *, 3> filter_in_out_filenames{
"blue_noise_filter.glsl", "src/blue_noise_filter.glsl",
"../src/blue_noise_filter.glsl"};
success = false;
bool success = false;
for (const auto filename : filter_in_out_filenames) {
std::ifstream ifs(filename);
if (ifs.good()) {
@ -1349,91 +1195,6 @@ image::Bl dither::blue_noise(int width, int height, int threads,
}
}
// create compute pipeline.
VkPipelineLayout compute_pipeline_layout;
VkPipeline compute_pipeline;
utility::Cleanup cleanup_pipeline_layout{};
utility::Cleanup cleanup_pipeline{};
{
// Load shader.
std::vector<char> shader;
{
std::ifstream ifs("compute.spv");
if (!ifs.good()) {
std::clog << "WARNING: Failed to find compute.spv!\n";
goto ENDOF_VULKAN;
}
ifs.seekg(0, std::ios_base::end);
auto size = ifs.tellg();
shader.resize(size);
ifs.seekg(0);
ifs.read(shader.data(), size);
ifs.close();
}
VkShaderModuleCreateInfo shader_module_create_info{};
shader_module_create_info.sType =
VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
shader_module_create_info.codeSize = shader.size();
shader_module_create_info.pCode =
reinterpret_cast<const uint32_t *>(shader.data());
VkShaderModule compute_shader_module;
if (vkCreateShaderModule(device, &shader_module_create_info, nullptr,
&compute_shader_module) != VK_SUCCESS) {
std::clog << "WARNING: Failed to create shader module!\n";
goto ENDOF_VULKAN;
}
utility::Cleanup cleanup_shader_module(
[device](void *ptr) {
vkDestroyShaderModule(device, *((VkShaderModule *)ptr), nullptr);
},
&compute_shader_module);
VkPipelineShaderStageCreateInfo compute_shader_stage_info{};
compute_shader_stage_info.sType =
VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
compute_shader_stage_info.stage = VK_SHADER_STAGE_COMPUTE_BIT;
compute_shader_stage_info.module = compute_shader_module;
compute_shader_stage_info.pName = "main";
VkPipelineLayoutCreateInfo pipeline_layout_info{};
pipeline_layout_info.sType =
VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
pipeline_layout_info.setLayoutCount = 1;
pipeline_layout_info.pSetLayouts = &compute_desc_set_layout;
if (vkCreatePipelineLayout(device, &pipeline_layout_info, nullptr,
&compute_pipeline_layout) != VK_SUCCESS) {
std::clog << "WARNING: Failed to create compute pipeline layout!\n";
goto ENDOF_VULKAN;
}
cleanup_pipeline_layout = utility::Cleanup(
[device](void *ptr) {
vkDestroyPipelineLayout(device, *((VkPipelineLayout *)ptr),
nullptr);
},
&compute_pipeline_layout);
VkComputePipelineCreateInfo pipeline_info{};
pipeline_info.sType = VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO;
pipeline_info.layout = compute_pipeline_layout;
pipeline_info.stage = compute_shader_stage_info;
if (vkCreateComputePipelines(device, VK_NULL_HANDLE, 1, &pipeline_info,
nullptr, &compute_pipeline) != VK_SUCCESS) {
std::clog << "WARNING: Failed to create compute pipeline!\n";
goto ENDOF_VULKAN;
}
cleanup_pipeline = utility::Cleanup(
[device](void *ptr) {
vkDestroyPipeline(device, *((VkPipeline *)ptr), nullptr);
},
&compute_pipeline);
}
VkPipelineLayout filter_in_out_pipeline_layout;
VkPipeline filter_in_out_pipeline;
utility::Cleanup cleanup_filter_in_out_pipeline_layout{};
@ -1632,8 +1393,6 @@ image::Bl dither::blue_noise(int width, int height, int threads,
int filter_size = (width + height) / 2;
std::vector<float> precomputed = internal::precompute_gaussian(filter_size);
VkDeviceSize precomputed_size = sizeof(float) * precomputed.size();
VkDeviceSize filter_out_size = sizeof(float) * width * height;
VkDeviceSize pbp_size = sizeof(int) * width * height;
VkDeviceSize other_size = sizeof(int) * 3;
VkBuffer precomputed_buf;
@ -1695,48 +1454,6 @@ image::Bl dither::blue_noise(int width, int height, int threads,
precomputed_size);
}
VkBuffer filter_out_buf;
VkDeviceMemory filter_out_buf_mem;
if (!internal::vulkan_create_buffer(device, phys_device, filter_out_size,
VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
filter_out_buf, filter_out_buf_mem)) {
std::clog << "WARNING: Failed to create filter_out buffer!\n";
goto ENDOF_VULKAN;
}
utility::Cleanup cleanup_filter_out_buf(
[device](void *ptr) {
vkDestroyBuffer(device, *((VkBuffer *)ptr), nullptr);
},
&filter_out_buf);
utility::Cleanup cleanup_filter_out_buf_mem(
[device](void *ptr) {
vkFreeMemory(device, *((VkDeviceMemory *)ptr), nullptr);
},
&filter_out_buf_mem);
VkBuffer pbp_buf;
VkDeviceMemory pbp_buf_mem;
if (!internal::vulkan_create_buffer(device, phys_device, pbp_size,
VK_BUFFER_USAGE_STORAGE_BUFFER_BIT |
VK_BUFFER_USAGE_TRANSFER_DST_BIT,
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
pbp_buf, pbp_buf_mem)) {
std::clog << "WARNING: Failed to create pbp buffer!\n";
goto ENDOF_VULKAN;
}
utility::Cleanup cleanup_pbp_buf(
[device](void *ptr) {
vkDestroyBuffer(device, *((VkBuffer *)ptr), nullptr);
},
&pbp_buf);
utility::Cleanup cleanup_pbp_buf_mem(
[device](void *ptr) {
vkFreeMemory(device, *((VkDeviceMemory *)ptr), nullptr);
},
&pbp_buf_mem);
VkBuffer other_buf;
VkDeviceMemory other_buf_mem;
utility::Cleanup cleanup_other_buf{};
@ -1947,33 +1664,6 @@ image::Bl dither::blue_noise(int width, int height, int threads,
staging_buf, state_buf, sizeof(int));
}
VkDescriptorPool descriptor_pool;
utility::Cleanup cleanup_descriptor_pool{};
{
VkDescriptorPoolSize pool_size{};
pool_size.type = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
pool_size.descriptorCount = 4;
VkDescriptorPoolCreateInfo pool_info{};
pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
pool_info.poolSizeCount = 1;
pool_info.pPoolSizes = &pool_size;
pool_info.maxSets = 1;
if (vkCreateDescriptorPool(device, &pool_info, nullptr,
&descriptor_pool) != VK_SUCCESS) {
std::clog << "WARNING: Failed to create descriptor pool!\n";
goto ENDOF_VULKAN;
}
cleanup_descriptor_pool = utility::Cleanup(
[device](void *ptr) {
vkDestroyDescriptorPool(device, *((VkDescriptorPool *)ptr),
nullptr);
},
&descriptor_pool);
}
VkDescriptorPool filter_in_out_desc_pool;
utility::Cleanup cleanup_filter_in_out_desc_pool{};
{
@ -2031,74 +1721,6 @@ image::Bl dither::blue_noise(int width, int height, int threads,
&minmax_descriptor_pool);
}
VkDescriptorSet compute_descriptor_set;
{
VkDescriptorSetAllocateInfo alloc_info{};
alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
alloc_info.descriptorPool = descriptor_pool;
alloc_info.descriptorSetCount = 1;
alloc_info.pSetLayouts = &compute_desc_set_layout;
if (vkAllocateDescriptorSets(device, &alloc_info,
&compute_descriptor_set) != VK_SUCCESS) {
std::clog << "WARNING: Failed to allocate descriptor set!\n";
goto ENDOF_VULKAN;
}
std::array<VkWriteDescriptorSet, 4> descriptor_writes{};
descriptor_writes[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
descriptor_writes[0].dstSet = compute_descriptor_set;
descriptor_writes[0].dstBinding = 0;
descriptor_writes[0].dstArrayElement = 0;
descriptor_writes[0].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
descriptor_writes[0].descriptorCount = 1;
VkDescriptorBufferInfo precomputed_info{};
precomputed_info.buffer = precomputed_buf;
precomputed_info.offset = 0;
precomputed_info.range = VK_WHOLE_SIZE;
descriptor_writes[0].pBufferInfo = &precomputed_info;
descriptor_writes[1].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
descriptor_writes[1].dstSet = compute_descriptor_set;
descriptor_writes[1].dstBinding = 1;
descriptor_writes[1].dstArrayElement = 0;
descriptor_writes[1].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
descriptor_writes[1].descriptorCount = 1;
VkDescriptorBufferInfo filter_out_info{};
filter_out_info.buffer = filter_out_buf;
filter_out_info.offset = 0;
filter_out_info.range = VK_WHOLE_SIZE;
descriptor_writes[1].pBufferInfo = &filter_out_info;
descriptor_writes[2].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
descriptor_writes[2].dstSet = compute_descriptor_set;
descriptor_writes[2].dstBinding = 2;
descriptor_writes[2].dstArrayElement = 0;
descriptor_writes[2].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
descriptor_writes[2].descriptorCount = 1;
VkDescriptorBufferInfo pbp_info{};
pbp_info.buffer = pbp_buf;
pbp_info.offset = 0;
pbp_info.range = VK_WHOLE_SIZE;
descriptor_writes[2].pBufferInfo = &pbp_info;
descriptor_writes[3].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
descriptor_writes[3].dstSet = compute_descriptor_set;
descriptor_writes[3].dstBinding = 3;
descriptor_writes[3].dstArrayElement = 0;
descriptor_writes[3].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
descriptor_writes[3].descriptorCount = 1;
VkDescriptorBufferInfo other_info{};
other_info.buffer = other_buf;
other_info.offset = 0;
other_info.range = VK_WHOLE_SIZE;
descriptor_writes[3].pBufferInfo = &other_info;
vkUpdateDescriptorSets(device, descriptor_writes.size(),
descriptor_writes.data(), 0, nullptr);
}
VkDescriptorSet filter_in_out_desc_set;
{
VkDescriptorSetAllocateInfo alloc_info{};

50
src/blue_noise.glsl
View file

@ -1,50 +0,0 @@
#version 450
int twoToOne(int x, int y, int width, int height) {
while (x < 0) {
x += width;
}
while (y < 0) {
y += height;
}
x = x % width;
y = y % height;
return x + y * width;
}
layout(binding = 0) readonly buffer PreComputed { float precomputed[]; };
layout(binding = 1) writeonly buffer FilterOut { float filter_out[]; };
layout(binding = 2) readonly buffer PBP { int pbp[]; };
layout(binding = 3) readonly buffer Other {
int width;
int height;
int filter_size;
};
layout(local_size_x = 256) in;
void main() {
uint index = gl_GlobalInvocationID.x;
if (index >= width * height) {
return;
}
int x = int(index % width);
int y = int(index / width);
float sum = 0.0F;
for (int q = 0; q < filter_size; ++q) {
int q_prime = height - filter_size / 2 + y + q;
for (int p = 0; p < filter_size; ++p) {
int p_prime = width - filter_size / 2 + x + p;
if (pbp[twoToOne(p_prime, q_prime, width, height)] != 0) {
sum += precomputed[twoToOne(p, q, filter_size, filter_size)];
}
}
}
filter_out[index] = sum;
}