--- /dev/null
+#include <cstring>
+#include <msp/core/algorithm.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 "error.h"
+#include "program.h"
+#include "program_backend.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 {
+
+OpenGLProgram::OpenGLProgram():
+ linked(false)
+{
+ static Require _req(ARB_shader_objects);
+
+ id = glCreateProgram();
+ fill(stage_ids, stage_ids+MAX_STAGES, 0);
+}
+
+OpenGLProgram::~OpenGLProgram()
+{
+ for(unsigned i=0; i<MAX_STAGES; ++i)
+ if(stage_ids[i])
+ glDeleteShader(stage_ids[i]);
+ glDeleteProgram(id);
+}
+
+bool OpenGLProgram::has_stages() const
+{
+ for(unsigned i=0; i<MAX_STAGES; ++i)
+ if(stage_ids[i])
+ return true;
+ return false;
+}
+
+unsigned OpenGLProgram::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 OpenGLProgram::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 OpenGLProgram::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 OpenGLProgram::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())
+ {
+ 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;
+ }
+
+ 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);
+
+ 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 OpenGLProgram::finalize(const Module &mod)
+{
+ 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
+}
+
+void OpenGLProgram::query_uniforms()
+{
+ ReflectData &rd = static_cast<Program *>(this)->reflect_data;
+
+ unsigned count = 0;
+ glGetProgramiv(id, GL_ACTIVE_UNIFORMS, reinterpret_cast<int *>(&count));
+ rd.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;
+
+ rd.uniforms.push_back(ReflectData::UniformInfo());
+ ReflectData::UniformInfo &info = rd.uniforms.back();
+ info.name = name;
+ info.tag = name;
+ info.array_size = size;
+ info.type = from_gl_type(type);
+ uniform_names[i] = name;
+ }
+ }
+
+ sort_member(rd.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(rd.uniforms, Tag(uniform_names[i]), &ReflectData::UniformInfo::tag);
+ query_uniform_blocks(uniforms_by_index);
+ }
+
+ rd.uniform_blocks.push_back(ReflectData::UniformBlockInfo());
+ ReflectData::UniformBlockInfo &default_block = rd.uniform_blocks.back();
+
+ for(ReflectData::UniformInfo &u: rd.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(is_image(u.type))
+ glGetUniformiv(id, u.location, &u.binding);
+ else 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>;
+
+ 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();
+ rd.update_layout_hash();
+}
+
+void OpenGLProgram::query_uniform_blocks(const vector<ReflectData::UniformInfo *> &uniforms_by_index)
+{
+ ReflectData &rd = static_cast<Program *>(this)->reflect_data;
+
+ unsigned count = 0;
+ glGetProgramiv(id, GL_ACTIVE_UNIFORM_BLOCKS, reinterpret_cast<int *>(&count));
+ // Reserve an extra index for the default block
+ rd.uniform_blocks.reserve(count+1);
+ for(unsigned i=0; i<count; ++i)
+ {
+ char name[128];
+ int len;
+ glGetActiveUniformBlockName(id, i, sizeof(name), &len, name);
+ rd.uniform_blocks.push_back(ReflectData::UniformBlockInfo());
+ ReflectData::UniformBlockInfo &info = rd.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 OpenGLProgram::query_attributes()
+{
+ ReflectData &rd = static_cast<Program *>(this)->reflect_data;
+
+ unsigned count = 0;
+ glGetProgramiv(id, GL_ACTIVE_ATTRIBUTES, reinterpret_cast<int *>(&count));
+ rd.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;
+
+ rd.attributes.push_back(ReflectData::AttributeInfo());
+ ReflectData::AttributeInfo &info = rd.attributes.back();
+ info.name = name;
+ info.location = glGetAttribLocation(id, name);
+ info.array_size = size;
+ info.type = from_gl_type(type);
+ }
+ }
+}
+
+void OpenGLProgram::apply_bindings(const TransientData &transient)
+{
+ ReflectData &rd = static_cast<Program *>(this)->reflect_data;
+
+ for(unsigned i=0; i<rd.uniform_blocks.size(); ++i)
+ {
+ auto j = transient.blocks.find(rd.uniform_blocks[i].name);
+ if(j!=transient.blocks.end())
+ {
+ glUniformBlockBinding(id, i, j->second);
+ rd.uniform_blocks[i].bind_point = j->second;
+ }
+ }
+
+ if(!ARB_separate_shader_objects)
+ glUseProgram(id);
+ for(const auto &kvp: transient.textures)
+ {
+ int location = static_cast<const Program *>(this)->get_uniform_location(kvp.first);
+ if(location>=0)
+ {
+ if(ARB_separate_shader_objects)
+ glProgramUniform1i(id, location, kvp.second);
+ else
+ glUniform1i(location, kvp.second);
+ }
+ }
+}
+
+void OpenGLProgram::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 OpenGLProgram::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
+}
+
+} // namespace GL
+} // namespace Msp
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