X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fprogram.cpp;h=8ac13bbd0ce21454cb5af1b269dacc0fc6770205;hb=d9c437291135255422c71918cd0cab8a735848af;hp=35304554ea33b9d0911d299522ae847755223534;hpb=8366f8951984aa436938b1bb18a57067ff2260c1;p=libs%2Fgl.git

diff --git a/source/core/program.cpp b/source/core/program.cpp
index 35304554..8ac13bbd 100644
--- a/source/core/program.cpp
+++ b/source/core/program.cpp
@@ -1,73 +1,28 @@
-#include <cstring>
-#include <set>
 #include <msp/core/algorithm.h>
-#include <msp/core/maputils.h>
-#include <msp/core/raii.h>
-#include <msp/gl/extensions/arb_es2_compatibility.h>
-#include <msp/gl/extensions/arb_fragment_shader.h>
-#include <msp/gl/extensions/arb_gl_spirv.h>
-#include <msp/gl/extensions/arb_geometry_shader4.h>
-#include <msp/gl/extensions/arb_separate_shader_objects.h>
-#include <msp/gl/extensions/arb_shader_objects.h>
-#include <msp/gl/extensions/arb_uniform_buffer_object.h>
-#include <msp/gl/extensions/arb_vertex_shader.h>
-#include <msp/gl/extensions/ext_gpu_shader4.h>
-#include <msp/gl/extensions/khr_debug.h>
-#include <msp/gl/extensions/nv_non_square_matrices.h>
-#include <msp/io/print.h>
-#include "buffer.h"
 #include "error.h"
 #include "program.h"
-#include "resources.h"
-#include "glsl/compiler.h"
 
 using namespace std;
 
-namespace {
-
-template<typename T, void (*&func)(GLint, GLsizei, const T *)>
-void uniform_wrapper(unsigned index, unsigned count, const void *data)
-{
-	func(index, count, static_cast<const T *>(data));
-}
-
-template<typename T, void (*&func)(GLint, GLsizei, GLboolean, const T *)>
-void uniform_matrix_wrapper(unsigned index, unsigned count, const void *data)
-{
-	func(index, count, false, static_cast<const T *>(data));
-}
-
-}
-
 namespace Msp {
 namespace GL {
 
-Program::Program()
-{
-	init();
-}
-
 Program::Program(const Module &mod, const map<string, int> &spec_values)
 {
-	init();
 	add_stages(mod, spec_values);
 }
 
-void Program::init()
+Program::Program(Program &&other):
+	ProgramBackend(move(other)),
+	reflect_data(move(other.reflect_data)),
+	specialized_spirv(other.specialized_spirv)
 {
-	static Require _req(ARB_shader_objects);
-
-	id = glCreateProgram();
-	fill(stage_ids, stage_ids+MAX_STAGES, 0);
-	linked = false;
+	other.specialized_spirv = 0;
 }
 
 Program::~Program()
 {
-	for(unsigned i=0; i<MAX_STAGES; ++i)
-		if(stage_ids[i])
-			glDeleteShader(stage_ids[i]);
-	glDeleteProgram(id);
+	delete specialized_spirv;
 }
 
 void Program::add_stages(const Module &mod, const map<string, int> &spec_values)
@@ -75,234 +30,37 @@ void Program::add_stages(const Module &mod, const map<string, int> &spec_values)
 	if(has_stages())
 		throw invalid_operation("Program::add_stages");
 
-	TransientData transient;
+	reflect_data = ReflectData();
+	const Module *final_module = &mod;
+
 	switch(mod.get_format())
 	{
 	case Module::GLSL:
-		add_glsl_stages(static_cast<const GlslModule &>(mod), spec_values, transient);
+		add_glsl_stages(static_cast<const GlslModule &>(mod), spec_values);
 		break;
 	case Module::SPIR_V:
-		add_spirv_stages(static_cast<const SpirVModule &>(mod), spec_values, transient);
+		if(static_cast<const SpirVModule &>(mod).is_specializable())
+		{
+			specialized_spirv = static_cast<const SpirVModule &>(mod).specialize(spec_values);
+			final_module = specialized_spirv;
+		}
+		add_spirv_stages(*static_cast<const SpirVModule *>(final_module), spec_values);
 		break;
 	default:
 		throw invalid_argument("Program::add_stages");
 	}
 
-	finalize(mod, transient);
-}
-
-bool Program::has_stages() const
-{
-	for(unsigned i=0; i<MAX_STAGES; ++i)
-		if(stage_ids[i])
-			return true;
-	return false;
-}
-
-unsigned Program::add_stage(Stage type)
-{
-	GLenum gl_type;
-	switch(type)
-	{
-	case VERTEX: { static Require _req(ARB_vertex_shader); gl_type = GL_VERTEX_SHADER; } break;
-	case GEOMETRY: { static Require _req(ARB_geometry_shader4); gl_type = GL_GEOMETRY_SHADER; } break;
-	case FRAGMENT: { static Require _req(ARB_fragment_shader); gl_type = GL_FRAGMENT_SHADER; } break;
-	default: throw invalid_argument("Program::add_stage");
-	}
-
-	if(stage_ids[type])
-		throw invalid_operation("Program::add_stage");
-
-	unsigned stage_id = glCreateShader(gl_type);
-	stage_ids[type] = stage_id;
-	glAttachShader(id, stage_id);
-
-#ifdef DEBUG
-	if(!debug_name.empty() && KHR_debug)
-		set_stage_debug_name(stage_id, type);
-#endif
-
-	return stage_id;
-}
-
-void Program::add_glsl_stages(const GlslModule &mod, const map<string, int> &spec_values, TransientData &transient)
-{
-	SL::Compiler compiler;
-	compiler.set_source(mod.get_prepared_source(), "<module>");
-	compiler.specialize(spec_values);
-	compiler.compile(SL::Compiler::PROGRAM);
-#ifdef DEBUG
-	string diagnostics = compiler.get_diagnostics();
-	if(!diagnostics.empty())
-		IO::print("Program diagnostics:\n%s\n", diagnostics);
-#endif
-
-	vector<SL::Stage::Type> stages = compiler.get_stages();
-	if(stages.empty())
-		throw invalid_argument("Program::add_glsl_stages");
-
-	for(SL::Stage::Type st: stages)
-	{
-		unsigned stage_id = 0;
-		switch(st)
-		{
-		case SL::Stage::VERTEX: stage_id = add_stage(VERTEX); break;
-		case SL::Stage::GEOMETRY: stage_id = add_stage(GEOMETRY); break;
-		case SL::Stage::FRAGMENT: stage_id = add_stage(FRAGMENT); break;
-		default: throw invalid_operation("Program::add_glsl_stages");
-		}
-
-		string stage_src = compiler.get_stage_glsl(st);
-		const char *src_ptr = stage_src.data();
-		int src_len = stage_src.size();
-		glShaderSource(stage_id, 1, &src_ptr, &src_len);
-
-		if(st==SL::Stage::VERTEX)
-		{
-			for(const auto &kvp: compiler.get_vertex_attributes())
-				glBindAttribLocation(id, kvp.second, kvp.first.c_str());
-		}
-
-		if(st==SL::Stage::FRAGMENT && EXT_gpu_shader4)
-		{
-			for(const auto &kvp: compiler.get_fragment_outputs())
-				glBindFragDataLocation(id, kvp.second, kvp.first.c_str());
-		}
-
-		compile_glsl_stage(mod, stage_id);
-	}
-
-	transient.textures = compiler.get_texture_bindings();
-	transient.blocks = compiler.get_uniform_block_bindings();
-}
-
-void Program::compile_glsl_stage(const GlslModule &mod, unsigned stage_id)
-{
-	glCompileShader(stage_id);
-	int status = 0;
-	glGetShaderiv(stage_id, GL_COMPILE_STATUS, &status);
-
-	int info_log_len = 0;
-	glGetShaderiv(stage_id, GL_INFO_LOG_LENGTH, &info_log_len);
-	string info_log(info_log_len+1, 0);
-	glGetShaderInfoLog(stage_id, info_log_len+1, &info_log_len, &info_log[0]);
-	info_log.erase(info_log_len);
-	info_log = mod.get_source_map().translate_errors(info_log);
-
-	if(!status)
-		throw compile_error(info_log);
-#ifdef DEBUG
-	if(!info_log.empty())
-		IO::print("Shader compile info log:\n%s", info_log);
-#endif
-}
-
-void Program::add_spirv_stages(const SpirVModule &mod, const map<string, int> &spec_values, TransientData &transient)
-{
-	static Require _req(ARB_gl_spirv);
-	static Require _req2(ARB_ES2_compatibility);
-
-	unsigned n_stages = 0;
-	unsigned used_stage_ids[MAX_STAGES];
-	for(const SpirVModule::EntryPoint &e: mod.get_entry_points())
+	if(final_module->get_format()==Module::SPIR_V)
 	{
-		unsigned stage_id = 0;
-		switch(e.stage)
-		{
-		case SpirVModule::VERTEX: stage_id = add_stage(VERTEX); break;
-		case SpirVModule::GEOMETRY: stage_id = add_stage(GEOMETRY); break;
-		case SpirVModule::FRAGMENT: stage_id = add_stage(FRAGMENT); break;
-		default: throw invalid_operation("Program::add_spirv_stages");
-		}
-
-		used_stage_ids[n_stages++] = stage_id;
+		const SpirVModule &spirv_mod = *static_cast<const SpirVModule *>(final_module);
+		collect_uniforms(spirv_mod);
+		collect_attributes(spirv_mod);
+		collect_builtins(spirv_mod);
 	}
 
-	if(!n_stages)
-		throw invalid_argument("Program::add_spirv_stages");
-
-	const vector<uint32_t> &code = mod.get_code();
-	glShaderBinary(n_stages, used_stage_ids, GL_SHADER_BINARY_FORMAT_SPIR_V, &code[0], code.size()*4);
+	finalize_uniforms();
 
-	const vector<SpirVModule::Constant> &spec_consts = mod.get_spec_constants();
-	vector<unsigned> spec_id_array;
-	vector<unsigned> spec_value_array;
-	spec_id_array.reserve(spec_consts.size());
-	spec_value_array.reserve(spec_consts.size());
-	for(const SpirVModule::Constant &c: spec_consts)
-	{
-		auto i = spec_values.find(c.name);
-		if(i!=spec_values.end())
-		{
-			spec_id_array.push_back(c.constant_id);
-			spec_value_array.push_back(i->second);
-			transient.spec_values[c.constant_id] = i->second;
-		}
-	}
-
-	auto j = mod.get_entry_points().begin();
-	for(unsigned i=0; i<MAX_STAGES; ++i)
-		if(stage_ids[i])
-			glSpecializeShader(stage_ids[i], j->name.c_str(), spec_id_array.size(), &spec_id_array[0], &spec_value_array[0]);
-}
-
-void Program::finalize(const Module &mod, const TransientData &transient)
-{
-	reflect_data = ReflectData();
-
-	glLinkProgram(id);
-	int status = 0;
-	glGetProgramiv(id, GL_LINK_STATUS, &status);
-	linked = status;
-
-	int info_log_len = 0;
-	glGetProgramiv(id, GL_INFO_LOG_LENGTH, &info_log_len);
-	string info_log(info_log_len+1, 0);
-	glGetProgramInfoLog(id, info_log_len+1, &info_log_len, &info_log[0]);
-	info_log.erase(info_log_len);
-	if(mod.get_format()==Module::GLSL)
-		info_log = static_cast<const GlslModule &>(mod).get_source_map().translate_errors(info_log);
-
-	if(!linked)
-		throw compile_error(info_log);
-#ifdef DEBUG
-	if(!info_log.empty())
-		IO::print("Program link info log:\n%s", info_log);
-#endif
-
-	if(mod.get_format()==Module::GLSL)
-	{
-		query_uniforms();
-		query_attributes();
-		for(unsigned i=0; i<reflect_data.uniform_blocks.size(); ++i)
-		{
-			auto j = transient.blocks.find(reflect_data.uniform_blocks[i].name);
-			if(j!=transient.blocks.end())
-			{
-				glUniformBlockBinding(id, i, j->second);
-				reflect_data.uniform_blocks[i].bind_point = j->second;
-			}
-		}
-
-		if(!ARB_separate_shader_objects)
-			glUseProgram(id);
-		for(const auto &kvp: transient.textures)
-		{
-			int location = get_uniform_location(kvp.first);
-			if(location>=0)
-			{
-				if(ARB_separate_shader_objects)
-					glProgramUniform1i(id, location, kvp.second);
-				else
-					glUniform1i(location, kvp.second);
-			}
-		}
-	}
-	else if(mod.get_format()==Module::SPIR_V)
-	{
-		collect_uniforms(static_cast<const SpirVModule &>(mod), transient.spec_values);
-		collect_attributes(static_cast<const SpirVModule &>(mod));
-	}
+	reflect_data.update_used_bindings();
 
 	for(const ReflectData::UniformInfo &u: reflect_data.uniforms)
 		require_type(u.type);
@@ -310,250 +68,64 @@ void Program::finalize(const Module &mod, const TransientData &transient)
 		require_type(a.type);
 }
 
-void Program::query_uniforms()
-{
-	unsigned count = 0;
-	glGetProgramiv(id, GL_ACTIVE_UNIFORMS, reinterpret_cast<int *>(&count));
-	reflect_data.uniforms.reserve(count);
-	vector<string> uniform_names(count);
-	for(unsigned i=0; i<count; ++i)
-	{
-		char name[128];
-		int len = 0;
-		int size;
-		GLenum type;
-		glGetActiveUniform(id, i, sizeof(name), &len, &size, &type, name);
-		if(len && strncmp(name, "gl_", 3))
-		{
-			/* Some implementations report the first element of a uniform array,
-			others report just the name of the array itself. */
-			if(len>3 && !strcmp(name+len-3, "[0]"))
-				name[len-3] = 0;
-
-			reflect_data.uniforms.push_back(ReflectData::UniformInfo());
-			ReflectData::UniformInfo &info = reflect_data.uniforms.back();
-			info.name = name;
-			info.tag = name;
-			info.array_size = size;
-			info.type = from_gl_type(type);
-			uniform_names[i] = name;
-		}
-	}
-
-	sort_member(reflect_data.uniforms, &ReflectData::UniformInfo::tag);
-
-	if(ARB_uniform_buffer_object)
-	{
-		vector<ReflectData::UniformInfo *> uniforms_by_index(count);
-		for(unsigned i=0; i<count; ++i)
-			if(!uniform_names[i].empty())
-				// The element is already known to be present
-				uniforms_by_index[i] = &*lower_bound_member(reflect_data.uniforms, Tag(uniform_names[i]), &ReflectData::UniformInfo::tag);
-		query_uniform_blocks(uniforms_by_index);
-	}
-
-	reflect_data.uniform_blocks.push_back(ReflectData::UniformBlockInfo());
-	ReflectData::UniformBlockInfo &default_block = reflect_data.uniform_blocks.back();
-
-	for(ReflectData::UniformInfo &u: reflect_data.uniforms)
-		if(!u.block)
-		{
-			u.location = glGetUniformLocation(id, u.name.c_str());
-			u.block = &default_block;
-			u.array_stride = get_type_size(u.type);
-			if(is_matrix(u.type))
-				u.matrix_stride = get_type_size(get_matrix_column_type(u.type));
-			default_block.uniforms.push_back(&u);
-
-			if(u.location>=0)
-			{
-				UniformCall::FuncPtr func = 0;
-				if(u.type==FLOAT)
-					func = &uniform_wrapper<float, glUniform1fv>;
-				else if(u.type==FLOAT_VEC2)
-					func = &uniform_wrapper<float, glUniform2fv>;
-				else if(u.type==FLOAT_VEC3)
-					func = &uniform_wrapper<float, glUniform3fv>;
-				else if(u.type==FLOAT_VEC4)
-					func = &uniform_wrapper<float, glUniform4fv>;
-				else if(u.type==INT)
-					func = &uniform_wrapper<int, glUniform1iv>;
-				else if(u.type==INT_VEC2)
-					func = &uniform_wrapper<int, glUniform2iv>;
-				else if(u.type==INT_VEC3)
-					func = &uniform_wrapper<int, glUniform3iv>;
-				else if(u.type==INT_VEC4)
-					func = &uniform_wrapper<int, glUniform4iv>;
-				else if(u.type==FLOAT_MAT2)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix2fv>;
-				else if(u.type==FLOAT_MAT3)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix3fv>;
-				else if(u.type==FLOAT_MAT4)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix4fv>;
-				else if(u.type==FLOAT_MAT2x3)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix2x3fv>;
-				else if(u.type==FLOAT_MAT3x2)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix3x2fv>;
-				else if(u.type==FLOAT_MAT2x4)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix2x4fv>;
-				else if(u.type==FLOAT_MAT4x2)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix4x2fv>;
-				else if(u.type==FLOAT_MAT3x4)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix3x4fv>;
-				else if(u.type==FLOAT_MAT4x3)
-					func = &uniform_matrix_wrapper<float, glUniformMatrix4x3fv>;
-				else if(is_image(u.type))
-					glGetUniformiv(id, u.location, &u.binding);
-
-				if(func)
-					uniform_calls.push_back(UniformCall(u.location, u.array_size, func));
-			}
-		}
-
-	default_block.sort_uniforms();
-	if(!default_block.uniforms.empty())
-	{
-		const ReflectData::UniformInfo &uni = *default_block.uniforms.back();
-		default_block.data_size = uni.location*16+uni.array_size*get_type_size(uni.type);
-	}
-	default_block.update_layout_hash();
-	reflect_data.update_layout_hash();
-}
-
-void Program::query_uniform_blocks(const vector<ReflectData::UniformInfo *> &uniforms_by_index)
-{
-	unsigned count = 0;
-	glGetProgramiv(id, GL_ACTIVE_UNIFORM_BLOCKS, reinterpret_cast<int *>(&count));
-	// Reserve an extra index for the default block
-	reflect_data.uniform_blocks.reserve(count+1);
-	for(unsigned i=0; i<count; ++i)
-	{
-		char name[128];
-		int len;
-		glGetActiveUniformBlockName(id, i, sizeof(name), &len, name);
-		reflect_data.uniform_blocks.push_back(ReflectData::UniformBlockInfo());
-		ReflectData::UniformBlockInfo &info = reflect_data.uniform_blocks.back();
-		info.name = name;
-
-		int value;
-		glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_DATA_SIZE, &value);
-		info.data_size = value;
-
-		glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_BINDING, &value);
-		info.bind_point = value;
-
-		glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &value);
-		vector<int> indices(value);
-		glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, &indices[0]);
-		for(int j: indices)
-		{
-			if(!uniforms_by_index[j])
-				throw logic_error("Program::link");
-			info.uniforms.push_back(uniforms_by_index[j]);
-			uniforms_by_index[j]->block = &info;
-		}
-
-		vector<unsigned> query_indices(indices.begin(), indices.end());
-		vector<int> values(indices.size());
-		glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_OFFSET, &values[0]);
-		for(unsigned j=0; j<indices.size(); ++j)
-			uniforms_by_index[indices[j]]->offset = values[j];
-
-		query_indices.clear();
-		for(int j: indices)
-			if(uniforms_by_index[j]->array_size>1)
-				query_indices.push_back(j);
-		if(!query_indices.empty())
-		{
-			glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
-			for(unsigned j=0; j<query_indices.size(); ++j)
-				uniforms_by_index[query_indices[j]]->array_stride = values[j];
-		}
-
-		query_indices.clear();
-		for(int j: indices)
-		{
-			DataType t = uniforms_by_index[j]->type;
-			if(is_matrix(t))
-				query_indices.push_back(j);
-		}
-		if(!query_indices.empty())
-		{
-			glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
-			for(unsigned j=0; j<query_indices.size(); ++j)
-				uniforms_by_index[query_indices[j]]->matrix_stride = values[j];
-		}
-
-		info.sort_uniforms();
-		info.update_layout_hash();
-	}
-}
-
-void Program::query_attributes()
-{
-	unsigned count = 0;
-	glGetProgramiv(id, GL_ACTIVE_ATTRIBUTES, reinterpret_cast<int *>(&count));
-	reflect_data.attributes.reserve(count);
-	for(unsigned i=0; i<count; ++i)
-	{
-		char name[128];
-		int len = 0;
-		int size;
-		GLenum type;
-		glGetActiveAttrib(id, i, sizeof(name), &len, &size, &type, name);
-		if(len && strncmp(name, "gl_", 3))
-		{
-			if(len>3 && !strcmp(name+len-3, "[0]"))
-				name[len-3] = 0;
-
-			reflect_data.attributes.push_back(ReflectData::AttributeInfo());
-			ReflectData::AttributeInfo &info = reflect_data.attributes.back();
-			info.name = name;
-			info.location = glGetAttribLocation(id, name);
-			info.array_size = size;
-			info.type = from_gl_type(type);
-		}
-	}
-}
-
-void Program::collect_uniforms(const SpirVModule &mod, const map<unsigned, int> &spec_values)
+void Program::collect_uniforms(const SpirVModule &mod)
 {
 	// Prepare the default block
-	reflect_data.uniform_blocks.push_back(ReflectData::UniformBlockInfo());
+	reflect_data.uniform_blocks.emplace_back();
 	vector<vector<string> > block_uniform_names(1);
 
 	for(const SpirVModule::Variable &v: mod.get_variables())
 	{
-		if(v.storage==SpirVModule::UNIFORM && v.struct_type)
+		if((v.storage==SpirVModule::UNIFORM || v.storage==SpirVModule::PUSH_CONSTANT) && v.struct_type)
 		{
-			reflect_data.uniform_blocks.push_back(ReflectData::UniformBlockInfo());
+			reflect_data.uniform_blocks.emplace_back();
 			ReflectData::UniformBlockInfo &info = reflect_data.uniform_blocks.back();
 			info.name = v.struct_type->name;
-			info.bind_point = v.binding;
 			info.data_size = v.struct_type->size;
+			if(v.storage==SpirVModule::PUSH_CONSTANT)
+			{
+				info.bind_point = ReflectData::PUSH_CONSTANT;
+				reflect_data.push_constants_size = info.data_size;
+			}
+			else
+			{
+				if(v.binding>=0)
+					info.bind_point = v.binding | (v.descriptor_set<<20);
+				else
+					info.bind_point = ReflectData::DEFAULT_BLOCK;
+				reflect_data.n_descriptor_sets = max(reflect_data.n_descriptor_sets, v.descriptor_set+1);
+			}
 
 			string prefix;
 			if(!v.name.empty())
 				prefix = v.struct_type->name+".";
-			block_uniform_names.push_back(vector<string>());
-			collect_block_uniforms(*v.struct_type, prefix, 0, spec_values, block_uniform_names.back());
+			block_uniform_names.emplace_back();
+			collect_block_uniforms(*v.struct_type, prefix, 0, block_uniform_names.back());
 		}
-		else if(v.storage==SpirVModule::UNIFORM_CONSTANT && v.location>=0)
+		else if(v.storage==SpirVModule::UNIFORM_CONSTANT && (v.location>=0 || v.binding>=0))
 		{
 			block_uniform_names[0].push_back(v.name);
-			reflect_data.uniforms.push_back(ReflectData::UniformInfo());
+			reflect_data.uniforms.emplace_back();
 			ReflectData::UniformInfo &info = reflect_data.uniforms.back();
 			info.name = v.name;
 			info.tag = v.name;
 			info.location = v.location;
-			info.binding = v.binding;
-			info.array_size = v.array_size;
+			if(v.binding>=0)
+				info.binding = v.binding | (v.descriptor_set<<20);
+			reflect_data.n_descriptor_sets = max(reflect_data.n_descriptor_sets, v.descriptor_set+1);
+			info.array_size = max(v.array_size, 1U);
 			info.type = v.type;
 		}
 	}
 
 	sort_member(reflect_data.uniforms, &ReflectData::UniformInfo::tag);
 
+	if(block_uniform_names.front().empty())
+	{
+		reflect_data.uniform_blocks.erase(reflect_data.uniform_blocks.begin());
+		block_uniform_names.erase(block_uniform_names.begin());
+	}
+
 	for(unsigned i=0; i<reflect_data.uniform_blocks.size(); ++i)
 	{
 		ReflectData::UniformBlockInfo &block = reflect_data.uniform_blocks[i];
@@ -571,40 +143,31 @@ void Program::collect_uniforms(const SpirVModule &mod, const map<unsigned, int>
 	reflect_data.update_layout_hash();
 }
 
-void Program::collect_block_uniforms(const SpirVModule::Structure &strct, const string &prefix, unsigned base_offset, const map<unsigned, int> &spec_values, vector<string> &uniform_names)
+void Program::collect_block_uniforms(const SpirVModule::Structure &strct, const string &prefix, unsigned base_offset, vector<string> &uniform_names)
 {
 	for(const SpirVModule::StructMember &m: strct.members)
 	{
 		unsigned offset = base_offset+m.offset;
 		if(m.struct_type)
 		{
-			unsigned array_size = m.array_size;
-			if(m.array_size_spec)
-			{
-				array_size = m.array_size_spec->i_value;
-				auto j = spec_values.find(m.array_size_spec->constant_id);
-				if(j!=spec_values.end())
-					array_size = j->second;
-			}
-
-			if(array_size)
+			if(m.array_size)
 			{
-				for(unsigned j=0; j<array_size; ++j, offset+=m.array_stride)
-					collect_block_uniforms(*m.struct_type, format("%s%s[%d].", prefix, m.name, j), offset, spec_values, uniform_names);
+				for(unsigned j=0; j<m.array_size; ++j, offset+=m.array_stride)
+					collect_block_uniforms(*m.struct_type, format("%s%s[%d].", prefix, m.name, j), offset, uniform_names);
 			}
 			else
-				collect_block_uniforms(*m.struct_type, prefix+m.name+".", offset, spec_values, uniform_names);
+				collect_block_uniforms(*m.struct_type, prefix+m.name+".", offset, uniform_names);
 		}
 		else
 		{
 			string name = prefix+m.name;
 			uniform_names.push_back(name);
-			reflect_data.uniforms.push_back(ReflectData::UniformInfo());
+			reflect_data.uniforms.emplace_back();
 			ReflectData::UniformInfo &info = reflect_data.uniforms.back();
 			info.name = name;
 			info.tag = name;
 			info.offset = offset;
-			info.array_size = m.array_size;
+			info.array_size = max(m.array_size, 1U);
 			info.array_stride = m.array_stride;
 			info.matrix_stride = m.matrix_stride;
 			info.type = m.type;
@@ -620,7 +183,7 @@ void Program::collect_attributes(const SpirVModule &mod)
 			for(const SpirVModule::Variable *v: e.globals)
 				if(v->storage==SpirVModule::INPUT)
 				{
-					reflect_data.attributes.push_back(ReflectData::AttributeInfo());
+					reflect_data.attributes.emplace_back();
 					ReflectData::AttributeInfo &info = reflect_data.attributes.back();
 					info.name = v->name;
 					info.location = v->location;
@@ -628,6 +191,22 @@ void Program::collect_attributes(const SpirVModule &mod)
 					info.type = v->type;
 				}
 		}
+
+	sort_member(reflect_data.attributes, &ReflectData::AttributeInfo::name);
+}
+
+void Program::collect_builtins(const SpirVModule &mod)
+{
+	for(const SpirVModule::Variable &v: mod.get_variables())
+		if(v.storage==SpirVModule::OUTPUT && v.struct_type)
+			collect_builtins(*v.struct_type);
+}
+
+void Program::collect_builtins(const SpirVModule::Structure &strct)
+{
+	for(const SpirVModule::StructMember &m: strct.members)
+		if(m.builtin==SpirVModule::CLIP_DISTANCE)
+			reflect_data.n_clip_distances = m.array_size;
 }
 
 const ReflectData::UniformBlockInfo &Program::get_uniform_block_info(const string &name) const
@@ -675,6 +254,12 @@ int Program::get_uniform_binding(Tag tag) const
 	return i!=reflect_data.uniforms.end() && i->tag==tag ? i->binding : -1;
 }
 
+bool Program::uses_binding(int binding) const
+{
+	auto i = lower_bound(reflect_data.used_bindings, binding);
+	return i!=reflect_data.used_bindings.end() && *i==binding;
+}
+
 const ReflectData::AttributeInfo &Program::get_attribute_info(const string &name) const
 {
 	auto i = lower_bound_member(reflect_data.attributes, name, &ReflectData::AttributeInfo::name);
@@ -692,33 +277,6 @@ int Program::get_attribute_location(const string &name) const
 	return i!=reflect_data.attributes.end() && i->name==name ? i->location : -1;
 }
 
-void Program::set_debug_name(const string &name)
-{
-#ifdef DEBUG
-	debug_name = name;
-	if(KHR_debug)
-	{
-		glObjectLabel(GL_PROGRAM, id, name.size(), name.c_str());
-		for(unsigned i=0; i<MAX_STAGES; ++i)
-			if(stage_ids[i])
-				set_stage_debug_name(stage_ids[i], static_cast<Stage>(i));
-	}
-#else
-	(void)name;
-#endif
-}
-
-void Program::set_stage_debug_name(unsigned stage_id, Stage type)
-{
-#ifdef DEBUG
-	static const char *const suffixes[] = { " [VS]", " [GS]", " [FS]" };
-	string name = debug_name+suffixes[type];
-	glObjectLabel(GL_SHADER, stage_id, name.size(), name.c_str());
-#else
-	(void)stage_id; (void)type;
-#endif
-}
-
 
 Program::Loader::Loader(Program &p, Collection &c):
 	DataFile::CollectionObjectLoader<Program>(p, &c)