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SPIRV-Cross/main.cpp
Chip Davis 7eecf5a46b MSL: Support SPV_KHR_multiview. 
This is needed to support `VK_KHR_multiview`, which is in turn needed
for Vulkan 1.1 support. Unfortunately, Metal provides no native support
for this, and Apple is once again less than forthcoming, so we have to
implement it all ourselves.

Tessellation and geometry shaders are deliberately unsupported for now.
The problem is that the current implementation encodes the `ViewIndex`
as part of the `InstanceIndex`, which in the SPIR-V environment at least
only exists in the vertex shader. So we need to work out a way to pass
the view index along to the later stages.

This implementation runs vertex shaders for all views up to the highest
bit set in the view mask, even those whose bits are clear. The fragments
for the inactive views are then discarded. Avoiding this is difficult:
calculating the view indices becomes far more complicated if we can only
run for those views which are set in the mask.
2019-06-29 09:43:55 -05:00

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/*
* Copyright 2015-2019 Arm Limited
*
* 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.
*/
#include "spirv_cpp.hpp"
#include "spirv_cross_util.hpp"
#include "spirv_glsl.hpp"
#include "spirv_hlsl.hpp"
#include "spirv_msl.hpp"
#include "spirv_parser.hpp"
#include "spirv_reflect.hpp"
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <functional>
#include <limits>
#include <memory>
#include <stdexcept>
#include <unordered_map>
#include <unordered_set>
#ifdef HAVE_SPIRV_CROSS_GIT_VERSION
#include "gitversion.h"
#endif
#ifdef _MSC_VER
#pragma warning(disable : 4996)
#endif
using namespace spv;
using namespace SPIRV_CROSS_NAMESPACE;
using namespace std;
#ifdef SPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS
static inline void THROW(const char *str)
{
fprintf(stderr, "SPIRV-Cross will abort: %s\n", str);
fflush(stderr);
abort();
}
#else
#define THROW(x) throw runtime_error(x)
#endif
struct CLIParser;
struct CLICallbacks
{
void add(const char *cli, const function<void(CLIParser &)> &func)
{
callbacks[cli] = func;
}
unordered_map<string, function<void(CLIParser &)>> callbacks;
function<void()> error_handler;
function<void(const char *)> default_handler;
};
struct CLIParser
{
CLIParser(CLICallbacks cbs_, int argc_, char *argv_[])
: cbs(move(cbs_))
, argc(argc_)
, argv(argv_)
{
}
bool parse()
{
#ifndef SPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS
try
#endif
{
while (argc && !ended_state)
{
const char *next = *argv++;
argc--;
if (*next != '-' && cbs.default_handler)
{
cbs.default_handler(next);
}
else
{
auto itr = cbs.callbacks.find(next);
if (itr == ::end(cbs.callbacks))
{
THROW("Invalid argument");
}
itr->second(*this);
}
}
return true;
}
#ifndef SPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS
catch (...)
{
if (cbs.error_handler)
{
cbs.error_handler();
}
return false;
}
#endif
}
void end()
{
ended_state = true;
}
uint32_t next_uint()
{
if (!argc)
{
THROW("Tried to parse uint, but nothing left in arguments");
}
uint64_t val = stoul(*argv);
if (val > numeric_limits<uint32_t>::max())
{
THROW("next_uint() out of range");
}
argc--;
argv++;
return uint32_t(val);
}
double next_double()
{
if (!argc)
{
THROW("Tried to parse double, but nothing left in arguments");
}
double val = stod(*argv);
argc--;
argv++;
return val;
}
// Return a string only if it's not prefixed with `--`, otherwise return the default value
const char *next_value_string(const char *default_value)
{
if (!argc)
{
return default_value;
}
if (0 == strncmp("--", *argv, 2))
{
return default_value;
}
return next_string();
}
const char *next_string()
{
if (!argc)
{
THROW("Tried to parse string, but nothing left in arguments");
}
const char *ret = *argv;
argc--;
argv++;
return ret;
}
CLICallbacks cbs;
int argc;
char **argv;
bool ended_state = false;
};
static vector<uint32_t> read_spirv_file(const char *path)
{
FILE *file = fopen(path, "rb");
if (!file)
{
fprintf(stderr, "Failed to open SPIR-V file: %s\n", path);
return {};
}
fseek(file, 0, SEEK_END);
long len = ftell(file) / sizeof(uint32_t);
rewind(file);
vector<uint32_t> spirv(len);
if (fread(spirv.data(), sizeof(uint32_t), len, file) != size_t(len))
spirv.clear();
fclose(file);
return spirv;
}
static bool write_string_to_file(const char *path, const char *string)
{
FILE *file = fopen(path, "w");
if (!file)
{
fprintf(stderr, "Failed to write file: %s\n", path);
return false;
}
fprintf(file, "%s", string);
fclose(file);
return true;
}
static void print_resources(const Compiler &compiler, const char *tag, const SmallVector<Resource> &resources)
{
fprintf(stderr, "%s\n", tag);
fprintf(stderr, "=============\n\n");
bool print_ssbo = !strcmp(tag, "ssbos");
for (auto &res : resources)
{
auto &type = compiler.get_type(res.type_id);
if (print_ssbo && compiler.buffer_is_hlsl_counter_buffer(res.id))
continue;
// If we don't have a name, use the fallback for the type instead of the variable
// for SSBOs and UBOs since those are the only meaningful names to use externally.
// Push constant blocks are still accessed by name and not block name, even though they are technically Blocks.
bool is_push_constant = compiler.get_storage_class(res.id) == StorageClassPushConstant;
bool is_block = compiler.get_decoration_bitset(type.self).get(DecorationBlock) ||
compiler.get_decoration_bitset(type.self).get(DecorationBufferBlock);
bool is_sized_block = is_block && (compiler.get_storage_class(res.id) == StorageClassUniform ||
compiler.get_storage_class(res.id) == StorageClassUniformConstant);
uint32_t fallback_id = !is_push_constant && is_block ? res.base_type_id : res.id;
uint32_t block_size = 0;
uint32_t runtime_array_stride = 0;
if (is_sized_block)
{
auto &base_type = compiler.get_type(res.base_type_id);
block_size = uint32_t(compiler.get_declared_struct_size(base_type));
runtime_array_stride = uint32_t(compiler.get_declared_struct_size_runtime_array(base_type, 1) -
compiler.get_declared_struct_size_runtime_array(base_type, 0));
}
Bitset mask;
if (print_ssbo)
mask = compiler.get_buffer_block_flags(res.id);
else
mask = compiler.get_decoration_bitset(res.id);
string array;
for (auto arr : type.array)
array = join("[", arr ? convert_to_string(arr) : "", "]") + array;
fprintf(stderr, " ID %03u : %s%s", res.id,
!res.name.empty() ? res.name.c_str() : compiler.get_fallback_name(fallback_id).c_str(), array.c_str());
if (mask.get(DecorationLocation))
fprintf(stderr, " (Location : %u)", compiler.get_decoration(res.id, DecorationLocation));
if (mask.get(DecorationDescriptorSet))
fprintf(stderr, " (Set : %u)", compiler.get_decoration(res.id, DecorationDescriptorSet));
if (mask.get(DecorationBinding))
fprintf(stderr, " (Binding : %u)", compiler.get_decoration(res.id, DecorationBinding));
if (mask.get(DecorationInputAttachmentIndex))
fprintf(stderr, " (Attachment : %u)", compiler.get_decoration(res.id, DecorationInputAttachmentIndex));
if (mask.get(DecorationNonReadable))
fprintf(stderr, " writeonly");
if (mask.get(DecorationNonWritable))
fprintf(stderr, " readonly");
if (is_sized_block)
{
fprintf(stderr, " (BlockSize : %u bytes)", block_size);
if (runtime_array_stride)
fprintf(stderr, " (Unsized array stride: %u bytes)", runtime_array_stride);
}
uint32_t counter_id = 0;
if (print_ssbo && compiler.buffer_get_hlsl_counter_buffer(res.id, counter_id))
fprintf(stderr, " (HLSL counter buffer ID: %u)", counter_id);
fprintf(stderr, "\n");
}
fprintf(stderr, "=============\n\n");
}
static const char *execution_model_to_str(spv::ExecutionModel model)
{
switch (model)
{
case spv::ExecutionModelVertex:
return "vertex";
case spv::ExecutionModelTessellationControl:
return "tessellation control";
case ExecutionModelTessellationEvaluation:
return "tessellation evaluation";
case ExecutionModelGeometry:
return "geometry";
case ExecutionModelFragment:
return "fragment";
case ExecutionModelGLCompute:
return "compute";
case ExecutionModelRayGenerationNV:
return "raygenNV";
case ExecutionModelIntersectionNV:
return "intersectionNV";
case ExecutionModelCallableNV:
return "callableNV";
case ExecutionModelAnyHitNV:
return "anyhitNV";
case ExecutionModelClosestHitNV:
return "closesthitNV";
case ExecutionModelMissNV:
return "missNV";
default:
return "???";
}
}
static void print_resources(const Compiler &compiler, const ShaderResources &res)
{
auto &modes = compiler.get_execution_mode_bitset();
fprintf(stderr, "Entry points:\n");
auto entry_points = compiler.get_entry_points_and_stages();
for (auto &e : entry_points)
fprintf(stderr, " %s (%s)\n", e.name.c_str(), execution_model_to_str(e.execution_model));
fprintf(stderr, "\n");
fprintf(stderr, "Execution modes:\n");
modes.for_each_bit([&](uint32_t i) {
auto mode = static_cast<ExecutionMode>(i);
uint32_t arg0 = compiler.get_execution_mode_argument(mode, 0);
uint32_t arg1 = compiler.get_execution_mode_argument(mode, 1);
uint32_t arg2 = compiler.get_execution_mode_argument(mode, 2);
switch (static_cast<ExecutionMode>(i))
{
case ExecutionModeInvocations:
fprintf(stderr, " Invocations: %u\n", arg0);
break;
case ExecutionModeLocalSize:
fprintf(stderr, " LocalSize: (%u, %u, %u)\n", arg0, arg1, arg2);
break;
case ExecutionModeOutputVertices:
fprintf(stderr, " OutputVertices: %u\n", arg0);
break;
#define CHECK_MODE(m) \
case ExecutionMode##m: \
fprintf(stderr, " %s\n", #m); \
break
CHECK_MODE(SpacingEqual);
CHECK_MODE(SpacingFractionalEven);
CHECK_MODE(SpacingFractionalOdd);
CHECK_MODE(VertexOrderCw);
CHECK_MODE(VertexOrderCcw);
CHECK_MODE(PixelCenterInteger);
CHECK_MODE(OriginUpperLeft);
CHECK_MODE(OriginLowerLeft);
CHECK_MODE(EarlyFragmentTests);
CHECK_MODE(PointMode);
CHECK_MODE(Xfb);
CHECK_MODE(DepthReplacing);
CHECK_MODE(DepthGreater);
CHECK_MODE(DepthLess);
CHECK_MODE(DepthUnchanged);
CHECK_MODE(LocalSizeHint);
CHECK_MODE(InputPoints);
CHECK_MODE(InputLines);
CHECK_MODE(InputLinesAdjacency);
CHECK_MODE(Triangles);
CHECK_MODE(InputTrianglesAdjacency);
CHECK_MODE(Quads);
CHECK_MODE(Isolines);
CHECK_MODE(OutputPoints);
CHECK_MODE(OutputLineStrip);
CHECK_MODE(OutputTriangleStrip);
CHECK_MODE(VecTypeHint);
CHECK_MODE(ContractionOff);
default:
break;
}
});
fprintf(stderr, "\n");
print_resources(compiler, "subpass inputs", res.subpass_inputs);
print_resources(compiler, "inputs", res.stage_inputs);
print_resources(compiler, "outputs", res.stage_outputs);
print_resources(compiler, "textures", res.sampled_images);
print_resources(compiler, "separate images", res.separate_images);
print_resources(compiler, "separate samplers", res.separate_samplers);
print_resources(compiler, "images", res.storage_images);
print_resources(compiler, "ssbos", res.storage_buffers);
print_resources(compiler, "ubos", res.uniform_buffers);
print_resources(compiler, "push", res.push_constant_buffers);
print_resources(compiler, "counters", res.atomic_counters);
print_resources(compiler, "acceleration structures", res.acceleration_structures);
}
static void print_push_constant_resources(const Compiler &compiler, const SmallVector<Resource> &res)
{
for (auto &block : res)
{
auto ranges = compiler.get_active_buffer_ranges(block.id);
fprintf(stderr, "Active members in buffer: %s\n",
!block.name.empty() ? block.name.c_str() : compiler.get_fallback_name(block.id).c_str());
fprintf(stderr, "==================\n\n");
for (auto &range : ranges)
{
const auto &name = compiler.get_member_name(block.base_type_id, range.index);
fprintf(stderr, "Member #%3u (%s): Offset: %4u, Range: %4u\n", range.index,
!name.empty() ? name.c_str() : compiler.get_fallback_member_name(range.index).c_str(),
unsigned(range.offset), unsigned(range.range));
}
fprintf(stderr, "==================\n\n");
}
}
static void print_spec_constants(const Compiler &compiler)
{
auto spec_constants = compiler.get_specialization_constants();
fprintf(stderr, "Specialization constants\n");
fprintf(stderr, "==================\n\n");
for (auto &c : spec_constants)
fprintf(stderr, "ID: %u, Spec ID: %u\n", c.id, c.constant_id);
fprintf(stderr, "==================\n\n");
}
static void print_capabilities_and_extensions(const Compiler &compiler)
{
fprintf(stderr, "Capabilities\n");
fprintf(stderr, "============\n");
for (auto &capability : compiler.get_declared_capabilities())
fprintf(stderr, "Capability: %u\n", static_cast<unsigned>(capability));
fprintf(stderr, "============\n\n");
fprintf(stderr, "Extensions\n");
fprintf(stderr, "============\n");
for (auto &ext : compiler.get_declared_extensions())
fprintf(stderr, "Extension: %s\n", ext.c_str());
fprintf(stderr, "============\n\n");
}
struct PLSArg
{
PlsFormat format;
string name;
};
struct Remap
{
string src_name;
string dst_name;
unsigned components;
};
struct VariableTypeRemap
{
string variable_name;
string new_variable_type;
};
struct InterfaceVariableRename
{
StorageClass storageClass;
uint32_t location;
string variable_name;
};
struct CLIArguments
{
const char *input = nullptr;
const char *output = nullptr;
const char *cpp_interface_name = nullptr;
uint32_t version = 0;
uint32_t shader_model = 0;
uint32_t msl_version = 0;
bool es = false;
bool set_version = false;
bool set_shader_model = false;
bool set_msl_version = false;
bool set_es = false;
bool dump_resources = false;
bool force_temporary = false;
bool flatten_ubo = false;
bool fixup = false;
bool yflip = false;
bool sso = false;
bool support_nonzero_baseinstance = true;
bool msl_capture_output_to_buffer = false;
bool msl_swizzle_texture_samples = false;
bool msl_ios = false;
bool msl_pad_fragment_output = false;
bool msl_domain_lower_left = false;
bool msl_argument_buffers = false;
bool msl_texture_buffer_native = false;
bool msl_multiview = false;
bool glsl_emit_push_constant_as_ubo = false;
bool glsl_emit_ubo_as_plain_uniforms = false;
bool emit_line_directives = false;
SmallVector<uint32_t> msl_discrete_descriptor_sets;
SmallVector<PLSArg> pls_in;
SmallVector<PLSArg> pls_out;
SmallVector<Remap> remaps;
SmallVector<string> extensions;
SmallVector<VariableTypeRemap> variable_type_remaps;
SmallVector<InterfaceVariableRename> interface_variable_renames;
SmallVector<HLSLVertexAttributeRemap> hlsl_attr_remap;
string entry;
string entry_stage;
struct Rename
{
string old_name;
string new_name;
ExecutionModel execution_model;
};
SmallVector<Rename> entry_point_rename;
uint32_t iterations = 1;
bool cpp = false;
string reflect;
bool msl = false;
bool hlsl = false;
bool hlsl_compat = false;
bool hlsl_support_nonzero_base = false;
bool vulkan_semantics = false;
bool flatten_multidimensional_arrays = false;
bool use_420pack_extension = true;
bool remove_unused = false;
bool combined_samplers_inherit_bindings = false;
};
static void print_version()
{
#ifdef HAVE_SPIRV_CROSS_GIT_VERSION
fprintf(stderr, "%s\n", SPIRV_CROSS_GIT_REVISION);
#else
fprintf(stderr, "Git revision unknown. Build with CMake to create timestamp and revision info.\n");
#endif
}
static void print_help()
{
print_version();
fprintf(stderr, "Usage: spirv-cross\n"
"\t[--output <output path>]\n"
"\t[SPIR-V file]\n"
"\t[--es]\n"
"\t[--no-es]\n"
"\t[--version <GLSL version>]\n"
"\t[--dump-resources]\n"
"\t[--help]\n"
"\t[--revision]\n"
"\t[--force-temporary]\n"
"\t[--vulkan-semantics]\n"
"\t[--flatten-ubo]\n"
"\t[--fixup-clipspace]\n"
"\t[--flip-vert-y]\n"
"\t[--iterations iter]\n"
"\t[--cpp]\n"
"\t[--cpp-interface-name <name>]\n"
"\t[--glsl-emit-push-constant-as-ubo]\n"
"\t[--glsl-emit-ubo-as-plain-uniforms]\n"
"\t[--msl]\n"
"\t[--msl-version <MMmmpp>]\n"
"\t[--msl-capture-output]\n"
"\t[--msl-swizzle-texture-samples]\n"
"\t[--msl-ios]\n"
"\t[--msl-pad-fragment-output]\n"
"\t[--msl-domain-lower-left]\n"
"\t[--msl-argument-buffers]\n"
"\t[--msl-texture-buffer-native]\n"
"\t[--msl-discrete-descriptor-set <index>]\n"
"\t[--msl-multiview]\n"
"\t[--hlsl]\n"
"\t[--reflect]\n"
"\t[--shader-model]\n"
"\t[--hlsl-enable-compat]\n"
"\t[--hlsl-support-nonzero-basevertex-baseinstance]\n"
"\t[--separate-shader-objects]\n"
"\t[--pls-in format input-name]\n"
"\t[--pls-out format output-name]\n"
"\t[--remap source_name target_name components]\n"
"\t[--extension ext]\n"
"\t[--entry name]\n"
"\t[--stage <stage (vert, frag, geom, tesc, tese comp)>]\n"
"\t[--remove-unused-variables]\n"
"\t[--flatten-multidimensional-arrays]\n"
"\t[--no-420pack-extension]\n"
"\t[--remap-variable-type <variable_name> <new_variable_type>]\n"
"\t[--rename-interface-variable <in|out> <location> <new_variable_name>]\n"
"\t[--set-hlsl-vertex-input-semantic <location> <semantic>]\n"
"\t[--rename-entry-point <old> <new> <stage>]\n"
"\t[--combined-samplers-inherit-bindings]\n"
"\t[--no-support-nonzero-baseinstance]\n"
"\t[--emit-line-directives]\n"
"\n");
}
static bool remap_generic(Compiler &compiler, const SmallVector<Resource> &resources, const Remap &remap)
{
auto itr =
find_if(begin(resources), end(resources), [&remap](const Resource &res) { return res.name == remap.src_name; });
if (itr != end(resources))
{
compiler.set_remapped_variable_state(itr->id, true);
compiler.set_name(itr->id, remap.dst_name);
compiler.set_subpass_input_remapped_components(itr->id, remap.components);
return true;
}
else
return false;
}
static vector<PlsRemap> remap_pls(const SmallVector<PLSArg> &pls_variables, const SmallVector<Resource> &resources,
const SmallVector<Resource> *secondary_resources)
{
vector<PlsRemap> ret;
for (auto &pls : pls_variables)
{
bool found = false;
for (auto &res : resources)
{
if (res.name == pls.name)
{
ret.push_back({ res.id, pls.format });
found = true;
break;
}
}
if (!found && secondary_resources)
{
for (auto &res : *secondary_resources)
{
if (res.name == pls.name)
{
ret.push_back({ res.id, pls.format });
found = true;
break;
}
}
}
if (!found)
fprintf(stderr, "Did not find stage input/output/target with name \"%s\".\n", pls.name.c_str());
}
return ret;
}
static PlsFormat pls_format(const char *str)
{
if (!strcmp(str, "r11f_g11f_b10f"))
return PlsR11FG11FB10F;
else if (!strcmp(str, "r32f"))
return PlsR32F;
else if (!strcmp(str, "rg16f"))
return PlsRG16F;
else if (!strcmp(str, "rg16"))
return PlsRG16;
else if (!strcmp(str, "rgb10_a2"))
return PlsRGB10A2;
else if (!strcmp(str, "rgba8"))
return PlsRGBA8;
else if (!strcmp(str, "rgba8i"))
return PlsRGBA8I;
else if (!strcmp(str, "rgba8ui"))
return PlsRGBA8UI;
else if (!strcmp(str, "rg16i"))
return PlsRG16I;
else if (!strcmp(str, "rgb10_a2ui"))
return PlsRGB10A2UI;
else if (!strcmp(str, "rg16ui"))
return PlsRG16UI;
else if (!strcmp(str, "r32ui"))
return PlsR32UI;
else
return PlsNone;
}
static ExecutionModel stage_to_execution_model(const std::string &stage)
{
if (stage == "vert")
return ExecutionModelVertex;
else if (stage == "frag")
return ExecutionModelFragment;
else if (stage == "comp")
return ExecutionModelGLCompute;
else if (stage == "tesc")
return ExecutionModelTessellationControl;
else if (stage == "tese")
return ExecutionModelTessellationEvaluation;
else if (stage == "geom")
return ExecutionModelGeometry;
else
SPIRV_CROSS_THROW("Invalid stage.");
}
static string compile_iteration(const CLIArguments &args, std::vector<uint32_t> spirv_file)
{
Parser spirv_parser(move(spirv_file));
spirv_parser.parse();
unique_ptr<CompilerGLSL> compiler;
bool combined_image_samplers = false;
bool build_dummy_sampler = false;
if (args.cpp)
{
compiler.reset(new CompilerCPP(move(spirv_parser.get_parsed_ir())));
if (args.cpp_interface_name)
static_cast<CompilerCPP *>(compiler.get())->set_interface_name(args.cpp_interface_name);
}
else if (args.msl)
{
compiler.reset(new CompilerMSL(move(spirv_parser.get_parsed_ir())));
auto *msl_comp = static_cast<CompilerMSL *>(compiler.get());
auto msl_opts = msl_comp->get_msl_options();
if (args.set_msl_version)
msl_opts.msl_version = args.msl_version;
msl_opts.capture_output_to_buffer = args.msl_capture_output_to_buffer;
msl_opts.swizzle_texture_samples = args.msl_swizzle_texture_samples;
if (args.msl_ios)
msl_opts.platform = CompilerMSL::Options::iOS;
msl_opts.pad_fragment_output_components = args.msl_pad_fragment_output;
msl_opts.tess_domain_origin_lower_left = args.msl_domain_lower_left;
msl_opts.argument_buffers = args.msl_argument_buffers;
msl_opts.texture_buffer_native = args.msl_texture_buffer_native;
msl_opts.multiview = args.msl_multiview;
msl_comp->set_msl_options(msl_opts);
for (auto &v : args.msl_discrete_descriptor_sets)
msl_comp->add_discrete_descriptor_set(v);
}
else if (args.hlsl)
compiler.reset(new CompilerHLSL(move(spirv_parser.get_parsed_ir())));
else
{
combined_image_samplers = !args.vulkan_semantics;
if (!args.vulkan_semantics)
build_dummy_sampler = true;
compiler.reset(new CompilerGLSL(move(spirv_parser.get_parsed_ir())));
}
if (!args.variable_type_remaps.empty())
{
auto remap_cb = [&](const SPIRType &, const string &name, string &out) -> void {
for (const VariableTypeRemap &remap : args.variable_type_remaps)
if (name == remap.variable_name)
out = remap.new_variable_type;
};
compiler->set_variable_type_remap_callback(move(remap_cb));
}
for (auto &rename : args.entry_point_rename)
compiler->rename_entry_point(rename.old_name, rename.new_name, rename.execution_model);
auto entry_points = compiler->get_entry_points_and_stages();
auto entry_point = args.entry;
ExecutionModel model = ExecutionModelMax;
if (!args.entry_stage.empty())
{
model = stage_to_execution_model(args.entry_stage);
if (entry_point.empty())
{
// Just use the first entry point with this stage.
for (auto &e : entry_points)
{
if (e.execution_model == model)
{
entry_point = e.name;
break;
}
}
if (entry_point.empty())
{
fprintf(stderr, "Could not find an entry point with stage: %s\n", args.entry_stage.c_str());
exit(EXIT_FAILURE);
}
}
else
{
// Make sure both stage and name exists.
bool exists = false;
for (auto &e : entry_points)
{
if (e.execution_model == model && e.name == entry_point)
{
exists = true;
break;
}
}
if (!exists)
{
fprintf(stderr, "Could not find an entry point %s with stage: %s\n", entry_point.c_str(),
args.entry_stage.c_str());
exit(EXIT_FAILURE);
}
}
}
else if (!entry_point.empty())
{
// Make sure there is just one entry point with this name, or the stage
// is ambiguous.
uint32_t stage_count = 0;
for (auto &e : entry_points)
{
if (e.name == entry_point)
{
stage_count++;
model = e.execution_model;
}
}
if (stage_count == 0)
{
fprintf(stderr, "There is no entry point with name: %s\n", entry_point.c_str());
exit(EXIT_FAILURE);
}
else if (stage_count > 1)
{
fprintf(stderr, "There is more than one entry point with name: %s. Use --stage.\n", entry_point.c_str());
exit(EXIT_FAILURE);
}
}
if (!entry_point.empty())
compiler->set_entry_point(entry_point, model);
if (!args.set_version && !compiler->get_common_options().version)
{
fprintf(stderr, "Didn't specify GLSL version and SPIR-V did not specify language.\n");
print_help();
exit(EXIT_FAILURE);
}
CompilerGLSL::Options opts = compiler->get_common_options();
if (args.set_version)
opts.version = args.version;
if (args.set_es)
opts.es = args.es;
opts.force_temporary = args.force_temporary;
opts.separate_shader_objects = args.sso;
opts.flatten_multidimensional_arrays = args.flatten_multidimensional_arrays;
opts.enable_420pack_extension = args.use_420pack_extension;
opts.vulkan_semantics = args.vulkan_semantics;
opts.vertex.fixup_clipspace = args.fixup;
opts.vertex.flip_vert_y = args.yflip;
opts.vertex.support_nonzero_base_instance = args.support_nonzero_baseinstance;
opts.emit_push_constant_as_uniform_buffer = args.glsl_emit_push_constant_as_ubo;
opts.emit_uniform_buffer_as_plain_uniforms = args.glsl_emit_ubo_as_plain_uniforms;
opts.emit_line_directives = args.emit_line_directives;
compiler->set_common_options(opts);
// Set HLSL specific options.
if (args.hlsl)
{
auto *hlsl = static_cast<CompilerHLSL *>(compiler.get());
auto hlsl_opts = hlsl->get_hlsl_options();
if (args.set_shader_model)
{
if (args.shader_model < 30)
{
fprintf(stderr, "Shader model earlier than 30 (3.0) not supported.\n");
exit(EXIT_FAILURE);
}
hlsl_opts.shader_model = args.shader_model;
}
if (args.hlsl_compat)
{
// Enable all compat options.
hlsl_opts.point_size_compat = true;
hlsl_opts.point_coord_compat = true;
}
if (hlsl_opts.shader_model <= 30)
{
combined_image_samplers = true;
build_dummy_sampler = true;
}
hlsl_opts.support_nonzero_base_vertex_base_instance = args.hlsl_support_nonzero_base;
hlsl->set_hlsl_options(hlsl_opts);
}
if (build_dummy_sampler)
{
uint32_t sampler = compiler->build_dummy_sampler_for_combined_images();
if (sampler != 0)
{
// Set some defaults to make validation happy.
compiler->set_decoration(sampler, DecorationDescriptorSet, 0);
compiler->set_decoration(sampler, DecorationBinding, 0);
}
}
ShaderResources res;
if (args.remove_unused)
{
auto active = compiler->get_active_interface_variables();
res = compiler->get_shader_resources(active);
compiler->set_enabled_interface_variables(move(active));
}
else
res = compiler->get_shader_resources();
if (args.flatten_ubo)
{
for (auto &ubo : res.uniform_buffers)
compiler->flatten_buffer_block(ubo.id);
for (auto &ubo : res.push_constant_buffers)
compiler->flatten_buffer_block(ubo.id);
}
auto pls_inputs = remap_pls(args.pls_in, res.stage_inputs, &res.subpass_inputs);
auto pls_outputs = remap_pls(args.pls_out, res.stage_outputs, nullptr);
compiler->remap_pixel_local_storage(move(pls_inputs), move(pls_outputs));
for (auto &ext : args.extensions)
compiler->require_extension(ext);
for (auto &remap : args.remaps)
{
if (remap_generic(*compiler, res.stage_inputs, remap))
continue;
if (remap_generic(*compiler, res.stage_outputs, remap))
continue;
if (remap_generic(*compiler, res.subpass_inputs, remap))
continue;
}
for (auto &rename : args.interface_variable_renames)
{
if (rename.storageClass == StorageClassInput)
spirv_cross_util::rename_interface_variable(*compiler, res.stage_inputs, rename.location,
rename.variable_name);
else if (rename.storageClass == StorageClassOutput)
spirv_cross_util::rename_interface_variable(*compiler, res.stage_outputs, rename.location,
rename.variable_name);
else
{
fprintf(stderr, "error at --rename-interface-variable <in|out> ...\n");
exit(EXIT_FAILURE);
}
}
if (args.dump_resources)
{
print_resources(*compiler, res);
print_push_constant_resources(*compiler, res.push_constant_buffers);
print_spec_constants(*compiler);
print_capabilities_and_extensions(*compiler);
}
if (combined_image_samplers)
{
compiler->build_combined_image_samplers();
if (args.combined_samplers_inherit_bindings)
spirv_cross_util::inherit_combined_sampler_bindings(*compiler);
// Give the remapped combined samplers new names.
for (auto &remap : compiler->get_combined_image_samplers())
{
compiler->set_name(remap.combined_id, join("SPIRV_Cross_Combined", compiler->get_name(remap.image_id),
compiler->get_name(remap.sampler_id)));
}
}
if (args.hlsl)
{
auto *hlsl_compiler = static_cast<CompilerHLSL *>(compiler.get());
uint32_t new_builtin = hlsl_compiler->remap_num_workgroups_builtin();
if (new_builtin)
{
hlsl_compiler->set_decoration(new_builtin, DecorationDescriptorSet, 0);
hlsl_compiler->set_decoration(new_builtin, DecorationBinding, 0);
}
}
if (args.hlsl)
{
for (auto &remap : args.hlsl_attr_remap)
static_cast<CompilerHLSL *>(compiler.get())->add_vertex_attribute_remap(remap);
}
return compiler->compile();
}
static int main_inner(int argc, char *argv[])
{
CLIArguments args;
CLICallbacks cbs;
cbs.add("--help", [](CLIParser &parser) {
print_help();
parser.end();
});
cbs.add("--revision", [](CLIParser &parser) {
print_version();
parser.end();
});
cbs.add("--output", [&args](CLIParser &parser) { args.output = parser.next_string(); });
cbs.add("--es", [&args](CLIParser &) {
args.es = true;
args.set_es = true;
});
cbs.add("--no-es", [&args](CLIParser &) {
args.es = false;
args.set_es = true;
});
cbs.add("--version", [&args](CLIParser &parser) {
args.version = parser.next_uint();
args.set_version = true;
});
cbs.add("--dump-resources", [&args](CLIParser &) { args.dump_resources = true; });
cbs.add("--force-temporary", [&args](CLIParser &) { args.force_temporary = true; });
cbs.add("--flatten-ubo", [&args](CLIParser &) { args.flatten_ubo = true; });
cbs.add("--fixup-clipspace", [&args](CLIParser &) { args.fixup = true; });
cbs.add("--flip-vert-y", [&args](CLIParser &) { args.yflip = true; });
cbs.add("--iterations", [&args](CLIParser &parser) { args.iterations = parser.next_uint(); });
cbs.add("--cpp", [&args](CLIParser &) { args.cpp = true; });
cbs.add("--reflect", [&args](CLIParser &parser) { args.reflect = parser.next_value_string("json"); });
cbs.add("--cpp-interface-name", [&args](CLIParser &parser) { args.cpp_interface_name = parser.next_string(); });
cbs.add("--metal", [&args](CLIParser &) { args.msl = true; }); // Legacy compatibility
cbs.add("--glsl-emit-push-constant-as-ubo", [&args](CLIParser &) { args.glsl_emit_push_constant_as_ubo = true; });
cbs.add("--glsl-emit-ubo-as-plain-uniforms", [&args](CLIParser &) { args.glsl_emit_ubo_as_plain_uniforms = true; });
cbs.add("--msl", [&args](CLIParser &) { args.msl = true; });
cbs.add("--hlsl", [&args](CLIParser &) { args.hlsl = true; });
cbs.add("--hlsl-enable-compat", [&args](CLIParser &) { args.hlsl_compat = true; });
cbs.add("--hlsl-support-nonzero-basevertex-baseinstance",
[&args](CLIParser &) { args.hlsl_support_nonzero_base = true; });
cbs.add("--vulkan-semantics", [&args](CLIParser &) { args.vulkan_semantics = true; });
cbs.add("--flatten-multidimensional-arrays", [&args](CLIParser &) { args.flatten_multidimensional_arrays = true; });
cbs.add("--no-420pack-extension", [&args](CLIParser &) { args.use_420pack_extension = false; });
cbs.add("--msl-capture-output", [&args](CLIParser &) { args.msl_capture_output_to_buffer = true; });
cbs.add("--msl-swizzle-texture-samples", [&args](CLIParser &) { args.msl_swizzle_texture_samples = true; });
cbs.add("--msl-ios", [&args](CLIParser &) { args.msl_ios = true; });
cbs.add("--msl-pad-fragment-output", [&args](CLIParser &) { args.msl_pad_fragment_output = true; });
cbs.add("--msl-domain-lower-left", [&args](CLIParser &) { args.msl_domain_lower_left = true; });
cbs.add("--msl-argument-buffers", [&args](CLIParser &) { args.msl_argument_buffers = true; });
cbs.add("--msl-discrete-descriptor-set",
[&args](CLIParser &parser) { args.msl_discrete_descriptor_sets.push_back(parser.next_uint()); });
cbs.add("--msl-texture-buffer-native", [&args](CLIParser &) { args.msl_texture_buffer_native = true; });
cbs.add("--msl-multiview", [&args](CLIParser &) { args.msl_multiview = true; });
cbs.add("--extension", [&args](CLIParser &parser) { args.extensions.push_back(parser.next_string()); });
cbs.add("--rename-entry-point", [&args](CLIParser &parser) {
auto old_name = parser.next_string();
auto new_name = parser.next_string();
auto model = stage_to_execution_model(parser.next_string());
args.entry_point_rename.push_back({ old_name, new_name, move(model) });
});
cbs.add("--entry", [&args](CLIParser &parser) { args.entry = parser.next_string(); });
cbs.add("--stage", [&args](CLIParser &parser) { args.entry_stage = parser.next_string(); });
cbs.add("--separate-shader-objects", [&args](CLIParser &) { args.sso = true; });
cbs.add("--set-hlsl-vertex-input-semantic", [&args](CLIParser &parser) {
HLSLVertexAttributeRemap remap;
remap.location = parser.next_uint();
remap.semantic = parser.next_string();
args.hlsl_attr_remap.push_back(move(remap));
});
cbs.add("--remap", [&args](CLIParser &parser) {
string src = parser.next_string();
string dst = parser.next_string();
uint32_t components = parser.next_uint();
args.remaps.push_back({ move(src), move(dst), components });
});
cbs.add("--remap-variable-type", [&args](CLIParser &parser) {
string var_name = parser.next_string();
string new_type = parser.next_string();
args.variable_type_remaps.push_back({ move(var_name), move(new_type) });
});
cbs.add("--rename-interface-variable", [&args](CLIParser &parser) {
StorageClass cls = StorageClassMax;
string clsStr = parser.next_string();
if (clsStr == "in")
cls = StorageClassInput;
else if (clsStr == "out")
cls = StorageClassOutput;
uint32_t loc = parser.next_uint();
string var_name = parser.next_string();
args.interface_variable_renames.push_back({ cls, loc, move(var_name) });
});
cbs.add("--pls-in", [&args](CLIParser &parser) {
auto fmt = pls_format(parser.next_string());
auto name = parser.next_string();
args.pls_in.push_back({ move(fmt), move(name) });
});
cbs.add("--pls-out", [&args](CLIParser &parser) {
auto fmt = pls_format(parser.next_string());
auto name = parser.next_string();
args.pls_out.push_back({ move(fmt), move(name) });
});
cbs.add("--shader-model", [&args](CLIParser &parser) {
args.shader_model = parser.next_uint();
args.set_shader_model = true;
});
cbs.add("--msl-version", [&args](CLIParser &parser) {
args.msl_version = parser.next_uint();
args.set_msl_version = true;
});
cbs.add("--remove-unused-variables", [&args](CLIParser &) { args.remove_unused = true; });
cbs.add("--combined-samplers-inherit-bindings",
[&args](CLIParser &) { args.combined_samplers_inherit_bindings = true; });
cbs.add("--no-support-nonzero-baseinstance", [&](CLIParser &) { args.support_nonzero_baseinstance = false; });
cbs.add("--emit-line-directives", [&args](CLIParser &) { args.emit_line_directives = true; });
cbs.default_handler = [&args](const char *value) { args.input = value; };
cbs.error_handler = [] { print_help(); };
CLIParser parser{ move(cbs), argc - 1, argv + 1 };
if (!parser.parse())
return EXIT_FAILURE;
else if (parser.ended_state)
return EXIT_SUCCESS;
if (!args.input)
{
fprintf(stderr, "Didn't specify input file.\n");
print_help();
return EXIT_FAILURE;
}
auto spirv_file = read_spirv_file(args.input);
if (spirv_file.empty())
return EXIT_FAILURE;
// Special case reflection because it has little to do with the path followed by code-outputting compilers
if (!args.reflect.empty())
{
Parser spirv_parser(move(spirv_file));
spirv_parser.parse();
CompilerReflection compiler(move(spirv_parser.get_parsed_ir()));
compiler.set_format(args.reflect);
auto json = compiler.compile();
if (args.output)
write_string_to_file(args.output, json.c_str());
else
printf("%s", json.c_str());
return EXIT_SUCCESS;
}
string compiled_output;
if (args.iterations == 1)
compiled_output = compile_iteration(args, move(spirv_file));
else
{
for (unsigned i = 0; i < args.iterations; i++)
compiled_output = compile_iteration(args, spirv_file);
}
if (args.output)
write_string_to_file(args.output, compiled_output.c_str());
else
printf("%s", compiled_output.c_str());
return EXIT_SUCCESS;
}
int main(int argc, char *argv[])
{
#ifdef SPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS
return main_inner(argc, argv);
#else
// Make sure we catch the exception or it just disappears into the aether on Windows.
try
{
return main_inner(argc, argv);
}
catch (const std::exception &e)
{
fprintf(stderr, "SPIRV-Cross threw an exception: %s\n", e.what());
return EXIT_FAILURE;
}
#endif
}
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