stephenseo/blue_noise_generation
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Make OpenCL default backend

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Order of backends to use:
OpenCL -> Vulkan -> CPU threads

Unless I figure out a way to make Vulkan faster, OpenCL will be the
default backend used, or at least it will have higher priority than
Vulkan if both OpenCL and Vulkan is available.
This commit is contained in:
Stephen Seo 2024-04-01 11:19:16 +09:00
parent f3d1ad425c
commit 2854aa5104
1 changed files with 89 additions and 89 deletions
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178
src/blue_noise.cpp
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@ -519,6 +519,95 @@ std::vector<float> dither::internal::vulkan_buf_to_vec(float *mapped,
image::Bl dither::blue_noise(int width, int height, int threads,
bool use_opencl, bool use_vulkan) {
#if DITHERING_OPENCL_ENABLED == 1
if (use_opencl) {
// try to use OpenCL
do {
cl_device_id device;
cl_context context;
cl_program program;
cl_int err;
cl_platform_id platform;
int filter_size = (width + height) / 2;
err = clGetPlatformIDs(1, &platform, nullptr);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to identify a platform\n";
break;
}
err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, nullptr);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to get a device\n";
break;
}
context = clCreateContext(nullptr, 1, &device, nullptr, nullptr, &err);
{
char buf[1024];
std::ifstream program_file("src/blue_noise.cl");
if (!program_file.good()) {
std::cerr << "ERROR: Failed to read \"src/blue_noise.cl\" "
"(not found?)\n";
break;
}
std::string program_string;
while (program_file.good()) {
program_file.read(buf, 1024);
if (int read_count = program_file.gcount(); read_count > 0) {
program_string.append(buf, read_count);
}
}
const char *string_ptr = program_string.c_str();
std::size_t program_size = program_string.size();
program = clCreateProgramWithSource(
context, 1, (const char **)&string_ptr, &program_size, &err);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to create the program\n";
clReleaseContext(context);
break;
}
err = clBuildProgram(program, 1, &device, nullptr, nullptr, nullptr);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to build the program\n";
std::size_t log_size;
clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, 0,
nullptr, &log_size);
std::unique_ptr<char[]> log = std::make_unique<char[]>(log_size + 1);
log[log_size] = 0;
clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, log_size,
log.get(), nullptr);
std::cerr << log.get() << std::endl;
clReleaseProgram(program);
clReleaseContext(context);
break;
}
}
std::cout << "OpenCL: Initialized, trying cl_impl..." << std::endl;
std::vector<unsigned int> result = internal::blue_noise_cl_impl(
width, height, filter_size, context, device, program);
clReleaseProgram(program);
clReleaseContext(context);
if (!result.empty()) {
return internal::rangeToBl(result, width);
}
std::cout << "ERROR: Empty result\n";
} while (false);
}
#else
std::clog << "WARNING: Not compiled with OpenCL support!\n";
#endif
#if DITHERING_VULKAN_ENABLED == 1
if (use_vulkan) {
// Try to use Vulkan.
@ -1212,95 +1301,6 @@ ENDOF_VULKAN:
std::clog << "WARNING: Not compiled with Vulkan support!\n";
#endif // DITHERING_VULKAN_ENABLED == 1
#if DITHERING_OPENCL_ENABLED == 1
if (use_opencl) {
// try to use OpenCL
do {
cl_device_id device;
cl_context context;
cl_program program;
cl_int err;
cl_platform_id platform;
int filter_size = (width + height) / 2;
err = clGetPlatformIDs(1, &platform, nullptr);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to identify a platform\n";
break;
}
err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, nullptr);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to get a device\n";
break;
}
context = clCreateContext(nullptr, 1, &device, nullptr, nullptr, &err);
{
char buf[1024];
std::ifstream program_file("src/blue_noise.cl");
if (!program_file.good()) {
std::cerr << "ERROR: Failed to read \"src/blue_noise.cl\" "
"(not found?)\n";
break;
}
std::string program_string;
while (program_file.good()) {
program_file.read(buf, 1024);
if (int read_count = program_file.gcount(); read_count > 0) {
program_string.append(buf, read_count);
}
}
const char *string_ptr = program_string.c_str();
std::size_t program_size = program_string.size();
program = clCreateProgramWithSource(
context, 1, (const char **)&string_ptr, &program_size, &err);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to create the program\n";
clReleaseContext(context);
break;
}
err = clBuildProgram(program, 1, &device, nullptr, nullptr, nullptr);
if (err != CL_SUCCESS) {
std::cerr << "OpenCL: Failed to build the program\n";
std::size_t log_size;
clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, 0,
nullptr, &log_size);
std::unique_ptr<char[]> log = std::make_unique<char[]>(log_size + 1);
log[log_size] = 0;
clGetProgramBuildInfo(program, device, CL_PROGRAM_BUILD_LOG, log_size,
log.get(), nullptr);
std::cerr << log.get() << std::endl;
clReleaseProgram(program);
clReleaseContext(context);
break;
}
}
std::cout << "OpenCL: Initialized, trying cl_impl..." << std::endl;
std::vector<unsigned int> result = internal::blue_noise_cl_impl(
width, height, filter_size, context, device, program);
clReleaseProgram(program);
clReleaseContext(context);
if (!result.empty()) {
return internal::rangeToBl(result, width);
}
std::cout << "ERROR: Empty result\n";
} while (false);
}
#else
std::clog << "WARNING: Not compiled with OpenCL support!\n";
#endif
std::cout << "Vulkan/OpenCL: Failed to setup/use or is not enabled, using "
"regular impl..."
<< std::endl;