X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogrambuilder.cpp;h=247c249b380901623e1dfc02ac573966e445a89f;hp=26689bcef6ee20687c4586a201cf3f5bac5fbb7d;hb=HEAD;hpb=a1eb8711ba225bb4423868c50369ad5592465171 diff --git a/source/programbuilder.cpp b/source/programbuilder.cpp deleted file mode 100644 index 26689bce..00000000 --- a/source/programbuilder.cpp +++ /dev/null @@ -1,926 +0,0 @@ -#include -#include -#include -#include -#include "extension.h" -#include "program.h" -#include "programbuilder.h" -#include "shader.h" -#include "vertexformat.h" - -using namespace std; - -namespace Msp { -namespace GL { - -/* -Naming conventions: - n_* Normalized vector - l_* Lighting component - - obj_* Object space - eye_* Eye space - tbn_* Tangent-Binormal-Normal space - shd_* Shadow space - env_* Environment space - *_dir Direction vector - - zzz_* Wildcard space, resolved by the builder - All wildcard spaces within an expression must match - - xxx_yyy_* Matrix that transforms between yyy to xxx - The vector is on the side of its designated space, result will be - in the other space - *_matrix A matrix (duh) - *_rmatrix A mat4 that works with a row vector - - rgb_* Color with rgb components only - color_* Color with rgba components -*/ - -/* The array is stored in reverse order, so that variables always come after -anything that might need them. */ -const ProgramBuilder::VariableDefinition ProgramBuilder::standard_variables[] = -{ - { FRAGMENT, "gl_FragColor", "vec4", "frag_color", "g" }, - { FRAGMENT, "frag_color", "vec4", "color_base", "!t" }, - { FRAGMENT, "frag_color", "vec4", "tex_sample", "!l!s!mt" }, - { FRAGMENT, "frag_color", "vec4", "tex_sample*color_base", "l|s|mt" }, - { FRAGMENT, "color_base", "vec4", "vec4(1.0)", "!l!s!m" }, - { FRAGMENT, "color_base", "vec4", "color", "!l!sm" }, - { FRAGMENT, "color_base", "vec4", "vec4(vec3(l_shadow), 1.0)", "!ls!m" }, - { FRAGMENT, "color_base", "vec4", "color*vec4(vec3(l_shadow), 1.0)", "!lsm" }, - { FRAGMENT, "color_base", "vec4", "vec4(rgb_light_env, 1.0)", "l!m" }, - { FRAGMENT, "color_base", "vec4", "vec4(rgb_light_env, material.diffuse.a)", "lm" }, - { FRAGMENT, "rgb_light_env", "vec3", "rgb_light_full+reflect_sample.rgb*reflectivity", "e" }, - { FRAGMENT, "rgb_light_env", "vec3", "rgb_light_full", "!e" }, - { FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow+ambient_product_diffuse.rgb", "m" }, - { FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow", "!m" }, - { FRAGMENT, "ambient_product_diffuse", "vec4", "gl_FrontLightModelProduct.sceneColor", "g" }, - { FRAGMENT, "ambient_product_diffuse", "vec4", "ambient_color*material.diffuse", "!g" }, - { FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light*l_shadow", "s" }, - { FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light", "!s" }, - { FRAGMENT, "rgb_light[i]", "vec3", "vec3(l_diffuse[i])", "!m!p" }, - { FRAGMENT, "rgb_light[i]", "vec3", "vec3(l_diffuse[i]+l_specular[i])", "!mp" }, - { FRAGMENT, "rgb_light[i]", "vec3", "l_diffuse[i]*light_product_diffuse[i].rgb", "m!p" }, - { FRAGMENT, "rgb_light[i]", "vec3", "l_diffuse[i]*light_product_diffuse[i].rgb+l_specular[i]*light_product_specular[i].rgb", "mp" }, - { FRAGMENT, "light_product_diffuse[i]", "vec4", "gl_FrontLightProduct[i].diffuse", "g" }, - { FRAGMENT, "light_product_diffuse[i]", "vec4", "light_sources[i].diffuse*material.diffuse", "!g" }, - { FRAGMENT, "light_product_specular[i]", "vec4", "gl_FrontLightProduct[i].specular", "g" }, - { FRAGMENT, "light_product_specular[i]", "vec4", "light_sources[i].specular*material.specular", "!g" }, - { FRAGMENT, "reflect_sample", "vec4", "textureCube(environment, env_reflect_dir)", 0 }, - { FRAGMENT, "env_reflect_dir", "vec3", "env_eye_matrix*eye_reflect_dir", 0 }, - { FRAGMENT, "eye_reflect_dir", "vec3", "eye_tbn_matrix*tbn_reflect_dir", "n" }, - { FRAGMENT, "zzz_reflect_dir", "vec3", "reflect(zzz_incident_dir, n_zzz_normal)", 0 }, - { FRAGMENT, "l_shadow", "float", "mix(1.0, shadow_sample, shadow_darkness)", 0 }, - { FRAGMENT, "shadow_sample", "float", "shadow2D(shadow, shd_vertex).r", 0 }, - { FRAGMENT, "l_diffuse[i]", "float", "max(dot(n_zzz_normal, n_zzz_light_dir[i]), 0.0)", 0 }, - { FRAGMENT, "l_specular[i]", "float", "pow(max(dot(n_zzz_half_vec[i], n_zzz_normal), 0.0), material.shininess)", 0 }, - { FRAGMENT, "n_zzz_half_vec[i]", "vec3", "normalize(zzz_light_dir[i]-zzz_incident_dir)", 0 }, - { FRAGMENT, "n_zzz_light_dir[i]", "vec3", "normalize(zzz_light_dir[i])", 0 }, - { FRAGMENT, "n_tbn_normal", "vec3", "normal_sample*2.0-1.0", "n" }, - { FRAGMENT, "n_eye_normal", "vec3", "normalize(eye_normal)", "!n" }, - { FRAGMENT, "normal_sample", "vec3", "texture2D(normalmap, texture_coord).xyz", 0 }, - { FRAGMENT, "tex_sample", "vec4", "texture2D(texture, texture_coord)", 0 }, - - { VERTEX, "gl_Position", "vec4", "projection_matrix*eye_vertex", 0 }, - { VERTEX, "shd_vertex", "vec3", "vec3(dot(eye_vertex, gl_EyePlaneS[shadow_unit]), dot(eye_vertex, gl_EyePlaneT[shadow_unit]), dot(eye_vertex, gl_EyePlaneR[shadow_unit]))", "g" }, - { VERTEX, "shd_vertex", "vec3", "(shd_eye_matrix*eye_vertex).xyz", "!g" }, - { VERTEX, "tbn_light_dir[i]", "vec3", "eye_light_dir[i]*eye_tbn_matrix", 0 }, - { VERTEX, "eye_light_dir[i]", "vec3", "normalize(eye_light_position[i].xyz-eye_vertex.xyz*eye_light_position[i].w)", 0 }, - { VERTEX, "eye_light_position[i]", "vec4", "light_sources[i].position", 0 }, - { VERTEX, "tbn_incident_dir", "vec3", "eye_incident_dir*eye_tbn_matrix", 0 }, - { VERTEX, "eye_incident_dir", "vec3", "normalize(eye_vertex.xyz)", 0 }, - { VERTEX, "eye_tbn_matrix", "mat3", "mat3(eye_tangent, eye_binormal, eye_normal)", 0 }, - { VERTEX, "eye_vertex", "vec4", "eye_obj_matrix*vertex", 0 }, - { VERTEX, "eye_normal", "vec3", "eye_obj_normal_matrix*normal", 0 }, - { VERTEX, "eye_tangent", "vec3", "eye_obj_normal_matrix*tangent", 0 }, - { VERTEX, "eye_binormal", "vec3", "eye_obj_normal_matrix*binormal", 0 }, - { VERTEX, "texture_coord", "vec2", "texcoord.xy", 0 }, - - { ATTRIBUTE, "vertex", "vec4", "gl_Vertex", 0 }, - { ATTRIBUTE, "texcoord", "vec4", "gl_MultiTexCoord0", 0 }, - { ATTRIBUTE, "color", "vec4", "gl_Color", 0 }, - { ATTRIBUTE, "normal", "vec3", "gl_Normal", 0 }, - { ATTRIBUTE, "tangent", "vec3", 0, 0 }, - { ATTRIBUTE, "binormal", "vec3", 0, 0 }, - - { UNIFORM, "shadow_unit", "int", 0, 0 }, - { UNIFORM, "texture", "sampler2D", 0, 0 }, - { UNIFORM, "shadow", "sampler2DShadow", 0, 0 }, - { UNIFORM, "shadow_darkness", "float", 0, 0 }, - { UNIFORM, "normalmap", "sampler2D", 0, 0 }, - { UNIFORM, "environment", "samplerCube", 0, 0 }, - { UNIFORM, "env_eye_matrix", "mat3", 0, 0 }, - { UNIFORM, "reflectivity", "float", 0, 0 }, - { UNIFORM, "eye_obj_matrix", "mat4", "gl_ModelViewMatrix", 0 }, - { UNIFORM, "eye_obj_normal_matrix", "mat3", "gl_NormalMatrix", 0 }, - { UNIFORM, "projection_matrix", "mat4", "gl_ProjectionMatrix", 0 }, - { UNIFORM, "shd_eye_matrix", "mat4", 0, 0 }, - { UNIFORM, "light_sources", "struct { vec4 position; vec4 diffuse; vec4 specular; }[MAX_LIGHTS]", "gl_LightSource[i]", 0 }, - { UNIFORM, "ambient_color", "vec4", 0, 0 }, - { UNIFORM, "material", "struct { vec4 ambient; vec4 diffuse; vec4 specular; float shininess; }", "gl_FrontMaterial", 0 }, - - // Terminator entry - { NO_SCOPE, 0, 0, 0, 0 } -}; - -const char ProgramBuilder::interfaces[] = { 0, 0, 0, 'v', 0 }; - -ProgramBuilder::ProgramBuilder(const StandardFeatures &f): - features(f), - feature_flags(features.create_flags()), - optimize(true) -{ - if(!features.custom.empty()) - { - const char *whitespace = " \t\n"; - string::size_type start = 0; - while(1) - { - start = features.custom.find_first_not_of(whitespace, start); - if(start==string::npos) - break; - - string::size_type semicolon = features.custom.find(';', start); - if(semicolon==start) - { - ++start; - continue; - } - else if(semicolon==string::npos) - throw invalid_variable_definition(features.custom.substr(start)); - - string::size_type equals = features.custom.find('=', start); - if(equals>semicolon) - equals = string::npos; - - VariableDefinition var; - string::size_type decl_end = min(equals, semicolon); - for(unsigned i=0;; ++i) - { - string::size_type word_end = features.custom.find_first_of(whitespace, start); - word_end = min(word_end, decl_end); - features.custom[word_end] = 0; - - const char *word = &features.custom[start]; - if(i==0) - { - if(!strcmp(word, "uniform")) - var.scope = UNIFORM; - else if(!strcmp(word, "attribute")) - var.scope = ATTRIBUTE; - else if(!strcmp(word, "vertex")) - var.scope = VERTEX; - else if(!strcmp(word, "fragment")) - var.scope = FRAGMENT; - else - throw invalid_variable_definition(word); - } - else if(i==1) - var.type = word; - else if(i==2) - var.name = word; - - start = features.custom.find_first_not_of(whitespace, word_end+1); - if(start>=decl_end) - break; - } - - if(equals!=string::npos) - { - start = features.custom.find_first_not_of(whitespace, equals+1); - if(start>=semicolon) - throw invalid_variable_definition("no expression"); - features.custom[semicolon] = 0; - var.expression = &features.custom[start]; - } - else - var.expression = 0; - - var.flags = 0; - for(const VariableDefinition *j=standard_variables; j->name; ++j) - if(!strcmp(var.name, j->name)) - var.flags = "o"; - - custom_variables.push_front(var); - - start = semicolon+1; - } - } -} - -void ProgramBuilder::set_optimize(bool o) -{ - optimize = o; -} - -Program *ProgramBuilder::create_program() const -{ - Program *prog = new Program; - add_shaders(*prog); - return prog; -} - -void ProgramBuilder::add_shaders(Program &prog) const -{ - list variables; - list resolved_vars; - - variables.push_front(ShaderVariable("gl_Position")); - variables.push_front(ShaderVariable(features.legacy ? "gl_FragColor" : "frag_color")); - - list::const_iterator next_custom = custom_variables.begin(); - for(const VariableDefinition *i=standard_variables; i->name; ) - { - const VariableDefinition *def = 0; - if(next_custom!=custom_variables.end() && (!strcmp(next_custom->name, i->name) || !next_custom->flags)) - { - def = &*next_custom; - ++next_custom; - } - else - { - def = i; - ++i; - - // Skip over anything that isn't used with the supplied flags - if(def->flags && !evaluate_flags(def->flags)) - continue; - } - - // See if this variable can satisfy any unresolved variables - ShaderVariable *last_resolved = 0; - for(list::iterator j=variables.begin(); j!=variables.end(); ++j) - { - if(j->variable) - continue; - - if(!name_match(def->name, j->resolved_name.c_str())) - continue; - - if(last_resolved) - { - /* We've already resolved a non-fuzzy variable in this iteration. - If there are multiple variables that can be resolved, they refer - to the same variable. */ - j->resolve(*last_resolved); - continue; - } - - j->resolve(*def); - resolved_vars.push_front(&*j); - if(!j->fuzzy_space) - last_resolved = &*j; - - if(!def->expression) - continue; - - vector identifiers = extract_identifiers(def->expression); - for(vector::const_iterator k=identifiers.begin(); k!=identifiers.end(); ++k) - { - // Use an existing variable if possible, but only if it's not fuzzy - ShaderVariable *var = 0; - for(list::iterator l=variables.begin(); (!var && l!=variables.end()); ++l) - if(!l->fuzzy_space && l->resolved_name==*k) - var = &*l; - - if(!var) - { - variables.push_back(ShaderVariable(*k)); - var = &variables.back(); - } - j->add_reference(*var); - } - } - } - - // Array sizes need to be resolved for inline processing - for(list::iterator i=variables.end(); i!=variables.begin(); ) - (--i)->resolve_array(features); - - for(list::const_iterator i=resolved_vars.begin(); i!=resolved_vars.end(); ++i) - (*i)->check_inline(features.legacy, !optimize); - - prog.attach_shader_owned(new VertexShader(create_source(resolved_vars, VERTEX))); - prog.attach_shader_owned(new FragmentShader(create_source(resolved_vars, FRAGMENT))); - - if(!features.legacy) - { - prog.bind_fragment_data(0, "frag_color"); - prog.bind_attribute(VERTEX4, "vertex"); - if(features.lighting) - prog.bind_attribute(NORMAL3, "normal"); - else if(features.material) - prog.bind_attribute(COLOR4_FLOAT, "color"); - if(features.texture || features.normalmap) - prog.bind_attribute(TEXCOORD4, "texcoord"); - } - if(features.normalmap) - { - prog.bind_attribute(get_component_type(TANGENT3), "tangent"); - prog.bind_attribute(get_component_type(BINORMAL3), "binormal"); - } -} - -string ProgramBuilder::create_source(const list &variables, VariableScope scope) const -{ - string source; - - if(!features.legacy) - source += "#version 130\n"; - - for(list::const_iterator i=variables.begin(); i!=variables.end(); ++i) - if((*i)->variable->scope==UNIFORM && (*i)->is_referenced_from(scope) && !(*i)->inlined) - source += format("uniform %s;\n", (*i)->create_declaration()); - - /* Interface variables need to have global declarations. */ - for(list::const_iterator i=variables.begin(); i!=variables.end(); ++i) - { - if(!(*i)->resolved_name.compare(0, 3, "gl_")) - continue; - - InterfaceFlags interface = (*i)->get_interface_flags(scope); - - if(interface&INPUT) - { - const char *qualifier = (features.legacy ? scope==VERTEX ? "attribute" : "varying" : "in"); - source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope-1])); - } - - if(interface&OUTPUT) - { - const char *qualifier = (features.legacy ? "varying" : "out"); - source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope])); - } - } - - source += "void main()\n{\n"; - - list loop_vars; - unsigned loop_size = 0; - for(list::const_iterator i=variables.begin(); i!=variables.end(); ++i) - { - if(!loop_vars.empty() && !loop_vars.back()->in_loop && (*i)->array_size!=loop_size) - { - /* Declare all variables that need to be visible outside the loop. - Output variables are already declared. */ - for(list::const_iterator j=loop_vars.begin(); j!=loop_vars.end(); ++j) - { - InterfaceFlags interface = (*j)->get_interface_flags(scope); - if(!(*j)->in_loop && !(interface&OUTPUT)) - source += format("\t%s;\n", (*j)->create_declaration()); - } - - source += format("\tfor(int i=0; i<%d; ++i)\n\t{\n", loop_size); - for(list::const_iterator j=loop_vars.begin(); j!=loop_vars.end(); ++j) - { - if((*j)->variable->scope==scope && !(*j)->inlined) - { - string decl; - if((*j)->in_loop) - decl = (*j)->create_declaration(0, true); - else - { - decl = (*j)->resolved_name; - if(!(*j)->array_sum) - decl += "[i]"; - } - const char *oper = ((*j)->array_sum ? "+=" : "="); - source += format("\t\t%s %s %s;\n", decl, oper, (*j)->create_expression("i")); - } - - InterfaceFlags interface = (*j)->get_interface_flags(scope); - if(interface&OUTPUT) - { - string expr = ((*j)->inlined ? (*j)->create_expression("i") : (*j)->resolved_name+"[i]"); - source += format("\t\t%c_%s[i] = %s;\n", interfaces[scope], (*j)->resolved_name, expr); - } - } - source += "\t}\n"; - - loop_vars.clear(); - } - - InterfaceFlags interface = (*i)->get_interface_flags(scope); - - if((*i)->array_size>1) - { - if((*i)->variable->scope==scope || (interface&OUTPUT)) - { - loop_size = (*i)->array_size; - loop_vars.push_back(*i); - } - continue; - } - - if((*i)->variable->scope==scope && !(*i)->inlined) - { - string decl = ((interface&GOAL) ? (*i)->resolved_name : (*i)->create_declaration()); - source += format("\t%s = %s;\n", decl, (*i)->create_expression()); - } - - if((interface&(OUTPUT|GOAL))==OUTPUT) - { - string expr = ((*i)->inlined ? (*i)->create_expression() : (*i)->resolved_name); - source += format("\t%c_%s = %s;\n", interfaces[scope], (*i)->resolved_name, expr); - } - } - - source += '}'; - - return source; -} - -bool ProgramBuilder::evaluate_flags(const char *flags) const -{ - if(!flags) - return true; - - bool cond = true; - char oper = '&'; - for(const char *i=flags; *i; ++i) - { - if(*i>='a' && *i<='z') - { - bool found = (feature_flags.find(*i)!=string::npos); - if(oper=='|') - cond = (cond || found); - else if(oper=='!') - cond = (cond && !found); - else if(oper=='&') - cond = (cond && found); - oper = '&'; - } - else - oper = *i; - } - - return cond; -} - -ProgramBuilder::MatchType ProgramBuilder::name_match(const char *n1, const char *n2, const char **space) -{ - int i = 0; - int zzz = -1; - int zside = 0; - while(*n1 && *n2) - { - if(*n1==*n2 || *n1=='z' || *n2=='z') - { - if(*n1!=*n2) - { - int side = (*n1=='z' ? 1 : 2); - if(zzz<0) - { - zzz = i; - zside = side; - if(space) - { - if(*n1=='z') - *space = n2; - else - *space = n1; - } - } - else if(i>=zzz+3 || side!=zside) - return NO_MATCH; - } - } - else - return NO_MATCH; - ++n1; - ++n2; - ++i; - } - return (!*n1 && !*n2) ? (zzz>=0 ? FUZZY : EXACT) : ((*n1=='[' || *n2=='[') ? ARRAY : NO_MATCH); -} - -bool ProgramBuilder::parse_identifier(const char *ptr, unsigned &start, unsigned &length) -{ - bool found = false; - bool member = false; - bool subscript = false; - for(const char *i=ptr;; ++i) - { - if(!found) - { - if(!*i) - return false; - if(isalpha(*i) || *i=='_') - { - if(!member) - { - start = i-ptr; - found = true; - } - } - else if(*i=='.') - member = true; - else - member = false; - } - else - { - if(subscript) - { - if(*i==']') - { - length = i+1-(ptr+start); - return true; - } - else if(!isalpha(*i) || i>ptr+start+length+1) - return true; - } - else if(!isalnum(*i) && *i!='_') - { - length = i-(ptr+start); - if(*i=='[') - subscript = true; - else - return true; - } - } - } -} - -vector ProgramBuilder::extract_identifiers(const char *expression) -{ - vector result; - const char *ptr = expression; - unsigned start = 0; - unsigned length = 0; - while(parse_identifier(ptr, start, length)) - { - result.push_back(string(ptr+start, length)); - ptr += start+length; - } - return result; -} - -string ProgramBuilder::replace_identifiers(const char *expression, const map &replace_map) -{ - string result; - const char *ptr = expression; - unsigned start = 0; - unsigned length = 0; - while(parse_identifier(ptr, start, length)) - { - result.append(ptr, start); - string identifier(ptr+start, length); - map::const_iterator i = replace_map.find(identifier); - if(i!=replace_map.end()) - result += i->second; - else - result += identifier; - ptr += start+length; - } - result += ptr; - return result; -} - - -ProgramBuilder::StandardFeatures::StandardFeatures(): - texture(false), - material(false), - lighting(false), - max_lights(1), - specular(false), - normalmap(false), - shadow(false), - reflection(false), - legacy(!(get_glsl_version()>=Version(1, 30))) -{ } - -string ProgramBuilder::StandardFeatures::create_flags() const -{ - string flags; - if(texture) - flags += 't'; - if(material) - flags += 'm'; - if(lighting) - { - flags += 'l'; - if(specular) - flags += 'p'; - if(normalmap) - flags += 'n'; - } - if(shadow) - flags += 's'; - if(reflection) - flags += 'e'; - if(legacy) - flags += 'g'; - - return flags; -} - - -ProgramBuilder::ShaderVariable::ShaderVariable(const std::string &n): - name(n), - variable(0), - resolved_name(n), - fuzzy_space(name.find("zzz")!=string::npos), - array_sum(false), - array_size(0), - inlined(false), - inline_parens(false), - in_loop(false) -{ - string::size_type bracket = name.find('['); - if(bracket!=string::npos) - array_subscript = name.substr(bracket+1, name.size()-bracket-2); -} - -void ProgramBuilder::ShaderVariable::resolve(const VariableDefinition &var) -{ - variable = &var; - const char *space = 0; - MatchType match = name_match(var.name, resolved_name.c_str(), &space); - - if(match==FUZZY) - resolve_space(string(space, 3)); - else if(match==ARRAY) - { - if(array_subscript.empty()) - array_sum = true; - else if(var.scope==UNIFORM) - { - const char *bracket = strrchr(variable->type, '['); - if(bracket) - array_subscript = string(bracket+1, strlen(bracket)-2); - } - } -} - -void ProgramBuilder::ShaderVariable::resolve(ShaderVariable &var) -{ - for(list::iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i) - (*i)->update_reference(*this, var); - var.referenced_by.insert(var.referenced_by.end(), referenced_by.begin(), referenced_by.end()); -} - -void ProgramBuilder::ShaderVariable::resolve_space(const string &space) -{ - if(fuzzy_space) - { - resolved_space = space; - - string::size_type zzz = resolved_name.find("zzz"); - resolved_name.replace(zzz, 3, resolved_space); - fuzzy_space = false; - - // Resolving the space could have affected other variables that use this one - for(list::iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i) - (*i)->resolve_space(space); - } - - for(list::iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i) - if((*i)->fuzzy_space) - (*i)->resolve_space(space); -} - -void ProgramBuilder::ShaderVariable::resolve_array(const StandardFeatures &features, unsigned size_hint) -{ - if(array_size) - return; - if(!array_sum && array_subscript.empty()) - return; - - if(!array_subscript.empty()) - { - string::size_type bracket = resolved_name.find('['); - if(bracket!=string::npos) - resolved_name = resolved_name.substr(0, bracket); - } - - if(variable && variable->scope==UNIFORM) - { - if(array_subscript=="MAX_LIGHTS") - array_size = features.max_lights; - else if(isnumrc(array_subscript)) - array_size = lexical_cast(array_subscript); - else - throw invalid_variable_definition("invalid array size"); - } - - if(!array_size) - { - for(list::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i) - if((*i)->array_size) - { - array_size = (*i)->array_size; - break; - } - } - - if(!array_size && size_hint) - array_size = size_hint; - - if(array_size) - { - for(list::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i) - if(!(*i)->array_subscript.empty() && !(*i)->array_size) - (*i)->resolve_array(features, array_size); - } -} - -void ProgramBuilder::ShaderVariable::add_reference(ShaderVariable &var) -{ - referenced_vars.push_back(&var); - var.referenced_by.push_back(this); - if(var.fuzzy_space && !resolved_space.empty()) - var.resolve_space(resolved_space); -} - -void ProgramBuilder::ShaderVariable::update_reference(ShaderVariable &from, ShaderVariable &to) -{ - replace(referenced_vars.begin(), referenced_vars.end(), &from, &to); - replace(referenced_by.begin(), referenced_by.end(), &from, &to); - if(from.fuzzy_space && !to.fuzzy_space && !to.resolved_space.empty()) - resolve_space(to.resolved_space); -} - -void ProgramBuilder::ShaderVariable::check_inline(bool allow_legacy, bool trivial_only) -{ - if(variable->expression) - { - if(array_sum && array_size>1) - return; - if(!allow_legacy && !strncmp(variable->expression, "gl_", 3)) - return; - - // Never inline goal variables - if(referenced_by.empty()) - return; - - // Inline an expression consisting of a single identifier - unsigned start, length; - if(parse_identifier(variable->expression, start, length)) - if(start==0 && variable->expression[length]==0) - { - inlined = true; - return; - } - - if(trivial_only) - return; - - /* If all references to the variable come from arrays in the same scope - and of the same size, the variable can be embedded in the loop. */ - in_loop = (array_size>1 && !array_sum); - for(list::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i) - if((*i)->variable->scope!=variable->scope || (*i)->array_size!=array_size) - in_loop = false; - - /* Count all refs to this variable. Refs from array variables count once - per loop iteration. */ - unsigned total_refs = 0; - unsigned in_scope_refs = 0; - for(list::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i) - { - unsigned count = max((*i)->array_size*!in_loop, 1U); - total_refs += count; - if((*i)->variable->scope==variable->scope) - in_scope_refs += count; - } - - /* Inline if there's only one ref, or if all refs are in other scopes. - In the latter case, the actual inlining will happen in the interface - variable assignment. */ - if(total_refs==1 || in_scope_refs==0) - { - inlined = true; - unsigned level = 0; - for(const char *c=variable->expression; (!inline_parens && *c); ++c) - { - if(*c=='(') - ++level; - else if(*c==')') - --level; - else if(level==0 && !isalnum(*c) && *c!='_' && *c!='.') - inline_parens = true; - } - } - } -} - -bool ProgramBuilder::ShaderVariable::is_referenced_from(VariableScope scope) const -{ - for(list::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i) - if((*i)->variable->scope==scope) - return true; - return false; -} - -ProgramBuilder::InterfaceFlags ProgramBuilder::ShaderVariable::get_interface_flags(VariableScope scope) const -{ - /* Uniforms are available to all stages and are not passed through - interfaces */ - if(variable->scope==UNIFORM) - return NO_INTERFACE; - - int flags = NO_INTERFACE; - - for(list::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i) - { - /* Variables used in a later scope than they are declared in need to go - through the interface */ - if((*i)->variable->scope>scope && variable->scope<=scope) - flags |= OUTPUT; - if((*i)->variable->scope>=scope && variable->scopescope!=ATTRIBUTE || scope!=VERTEX) - flags |= INPUT; - } - - // Variables without any references are goals and also outputs. - if(referenced_by.empty() && variable->scope==scope) - flags |= OUTPUT|GOAL; - - return static_cast(flags); -} - -string ProgramBuilder::ShaderVariable::create_declaration(char interface, bool loop) const -{ - if(variable->scope==UNIFORM && !array_subscript.empty()) - { - const char *bracket = strrchr(variable->type, '['); - if(bracket) - return format("%s %s[%d]", string(variable->type, bracket), resolved_name, array_size); - } - - string array; - if(!array_sum && array_size>1 && !loop) - array = format("[%d]", array_size); - - if(interface) - return format("%s %c_%s%s", variable->type, interface, resolved_name, array); - else - return format("%s %s%s", variable->type, resolved_name, array); -} - -string ProgramBuilder::ShaderVariable::create_replacement(VariableScope from_scope, const char *loop) const -{ - string replacement = resolved_name; - InterfaceFlags interface = NO_INTERFACE; - if(variable) - { - interface = get_interface_flags(from_scope); - if((interface&INPUT) && interfaces[from_scope-1]) - replacement = format("%c_%s", interfaces[from_scope-1], replacement); - else if(inlined) - { - replacement = create_expression(loop); - if(inline_parens) - replacement = "("+replacement+")"; - return replacement; - } - } - - // Add an array subscript, unless the variable is embedded in a loop - if(!array_subscript.empty() && !in_loop) - { - if(loop) - return format("%s[%s]", replacement, loop); - else if(!variable || variable->scope==UNIFORM) - return replacement+"[0]"; - } - - return replacement; -} - -string ProgramBuilder::ShaderVariable::create_expression(const char *loop) const -{ - map replace_map; - for(list::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i) - { - string replacement = (*i)->create_replacement(variable->scope, loop); - if(replacement!=(*i)->name) - replace_map[(*i)->name] = replacement; - } - - if(replace_map.empty()) - return variable->expression; - else - return replace_identifiers(variable->expression, replace_map); -} - - -ProgramBuilder::StandardFeatures::Loader::Loader(StandardFeatures &f): - DataFile::ObjectLoader(f) -{ - add("custom", &StandardFeatures::custom); - add("lighting", &StandardFeatures::lighting); - add("material", &StandardFeatures::material); - add("max_lights", &StandardFeatures::max_lights); - add("normalmap", &StandardFeatures::normalmap); - add("reflection", &StandardFeatures::reflection); - add("shadow", &StandardFeatures::shadow); - add("specular", &StandardFeatures::specular); - add("texture", &StandardFeatures::texture); -} - -} // namespace GL -} // namespace Msp