3 #include <msp/strings/format.h>
4 #include <msp/strings/utils.h>
7 #include "programbuilder.h"
9 #include "vertexformat.h"
19 l_* Lighting component
23 tbn_* Tangent-Binormal-Normal space
25 env_* Environment space
26 *_dir Direction vector
28 zzz_* Wildcard space, resolved by the builder
29 All wildcard spaces within an expression must match
31 xxx_yyy_* Matrix that transforms between yyy to xxx
32 The vector is on the side of its designated space, result will be
34 *_matrix A matrix (duh)
35 *_rmatrix A mat4 that works with a row vector
37 rgb_* Color with rgb components only
38 color_* Color with rgba components
41 /* The array is stored in reverse order, so that variables always come after
42 anything that might need them. */
43 const ProgramBuilder::VariableDefinition ProgramBuilder::standard_variables[] =
45 { FRAGMENT, "gl_FragColor", "vec4", "frag_color", "g" },
46 { FRAGMENT, "frag_color", "vec4", "color_base", "!t" },
47 { FRAGMENT, "frag_color", "vec4", "tex_sample", "!l!s!mt" },
48 { FRAGMENT, "frag_color", "vec4", "tex_sample*color_base", "l|s|mt" },
49 { FRAGMENT, "color_base", "vec4", "vec4(1.0)", "!l!s!m" },
50 { FRAGMENT, "color_base", "vec4", "color", "!l!sm" },
51 { FRAGMENT, "color_base", "vec4", "vec4(vec3(l_shadow), 1.0)", "!ls!m" },
52 { FRAGMENT, "color_base", "vec4", "color*vec4(vec3(l_shadow), 1.0)", "!lsm" },
53 { FRAGMENT, "color_base", "vec4", "vec4(rgb_light_env, 1.0)", "l!m" },
54 { FRAGMENT, "color_base", "vec4", "vec4(rgb_light_env, material.diffuse.a)", "lm" },
55 { FRAGMENT, "rgb_light_env", "vec3", "rgb_light_full+reflect_sample.rgb*reflectivity", "e" },
56 { FRAGMENT, "rgb_light_env", "vec3", "rgb_light_full", "!e" },
57 { FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow+ambient_product_diffuse.rgb", "m" },
58 { FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow", "!m" },
59 { FRAGMENT, "ambient_product_diffuse", "vec4", "gl_FrontLightModelProduct.sceneColor", "g" },
60 { FRAGMENT, "ambient_product_diffuse", "vec4", "ambient_color*material.diffuse", "!g" },
61 { FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light*l_shadow", "s" },
62 { FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light", "!s" },
63 { FRAGMENT, "rgb_light[i]", "vec3", "vec3(l_diffuse[i])", "!m!p" },
64 { FRAGMENT, "rgb_light[i]", "vec3", "vec3(l_diffuse[i]+l_specular[i])", "!mp" },
65 { FRAGMENT, "rgb_light[i]", "vec3", "l_diffuse[i]*light_product_diffuse[i].rgb", "m!p" },
66 { FRAGMENT, "rgb_light[i]", "vec3", "l_diffuse[i]*light_product_diffuse[i].rgb+l_specular[i]*light_product_specular[i].rgb", "mp" },
67 { FRAGMENT, "light_product_diffuse[i]", "vec4", "gl_FrontLightProduct[i].diffuse", "g" },
68 { FRAGMENT, "light_product_diffuse[i]", "vec4", "light_sources[i].diffuse*material.diffuse", "!g" },
69 { FRAGMENT, "light_product_specular[i]", "vec4", "gl_FrontLightProduct[i].specular", "g" },
70 { FRAGMENT, "light_product_specular[i]", "vec4", "light_sources[i].specular*material.specular", "!g" },
71 { FRAGMENT, "reflect_sample", "vec4", "textureCube(environment, env_reflect_dir)", 0 },
72 { FRAGMENT, "env_reflect_dir", "vec3", "env_eye_matrix*eye_reflect_dir", 0 },
73 { FRAGMENT, "eye_reflect_dir", "vec3", "eye_tbn_matrix*tbn_reflect_dir", "n" },
74 { FRAGMENT, "zzz_reflect_dir", "vec3", "reflect(zzz_incident_dir, n_zzz_normal)", 0 },
75 { FRAGMENT, "l_shadow", "float", "mix(1.0, shadow_sample, shadow_darkness)", 0 },
76 { FRAGMENT, "shadow_sample", "float", "shadow2D(shadow, shd_vertex).r", 0 },
77 { FRAGMENT, "l_diffuse[i]", "float", "max(dot(n_zzz_normal, n_zzz_light_dir[i]), 0.0)", 0 },
78 { FRAGMENT, "l_specular[i]", "float", "pow(max(dot(n_zzz_half_vec[i], n_zzz_normal), 0.0), material.shininess)", 0 },
79 { FRAGMENT, "n_zzz_half_vec[i]", "vec3", "normalize(zzz_light_dir[i]-zzz_incident_dir)", 0 },
80 { FRAGMENT, "n_zzz_light_dir[i]", "vec3", "normalize(zzz_light_dir[i])", 0 },
81 { FRAGMENT, "n_tbn_normal", "vec3", "normal_sample*2.0-1.0", "n" },
82 { FRAGMENT, "n_eye_normal", "vec3", "normalize(eye_normal)", "!n" },
83 { FRAGMENT, "normal_sample", "vec3", "texture2D(normalmap, texture_coord).xyz", 0 },
84 { FRAGMENT, "tex_sample", "vec4", "texture2D(texture, texture_coord)", 0 },
86 { VERTEX, "gl_Position", "vec4", "projection_matrix*eye_vertex", 0 },
87 { 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" },
88 { VERTEX, "shd_vertex", "vec3", "(shd_eye_matrix*eye_vertex).xyz", "!g" },
89 { VERTEX, "tbn_light_dir[i]", "vec3", "eye_light_dir[i]*eye_tbn_matrix", 0 },
90 { VERTEX, "eye_light_dir[i]", "vec3", "normalize(eye_light_position[i].xyz-eye_vertex.xyz*eye_light_position[i].w)", 0 },
91 { VERTEX, "eye_light_position[i]", "vec4", "light_sources[i].position", 0 },
92 { VERTEX, "tbn_incident_dir", "vec3", "eye_incident_dir*eye_tbn_matrix", 0 },
93 { VERTEX, "eye_incident_dir", "vec3", "normalize(eye_vertex.xyz)", 0 },
94 { VERTEX, "eye_tbn_matrix", "mat3", "mat3(eye_tangent, eye_binormal, eye_normal)", 0 },
95 { VERTEX, "eye_vertex", "vec4", "eye_obj_matrix*vertex", 0 },
96 { VERTEX, "eye_normal", "vec3", "eye_obj_normal_matrix*normal", 0 },
97 { VERTEX, "eye_tangent", "vec3", "eye_obj_normal_matrix*tangent", 0 },
98 { VERTEX, "eye_binormal", "vec3", "eye_obj_normal_matrix*binormal", 0 },
99 { VERTEX, "texture_coord", "vec2", "texcoord.xy", 0 },
101 { ATTRIBUTE, "vertex", "vec4", "gl_Vertex", 0 },
102 { ATTRIBUTE, "texcoord", "vec4", "gl_MultiTexCoord0", 0 },
103 { ATTRIBUTE, "color", "vec4", "gl_Color", 0 },
104 { ATTRIBUTE, "normal", "vec3", "gl_Normal", 0 },
105 { ATTRIBUTE, "tangent", "vec3", 0, 0 },
106 { ATTRIBUTE, "binormal", "vec3", 0, 0 },
108 { UNIFORM, "shadow_unit", "int", 0, 0 },
109 { UNIFORM, "texture", "sampler2D", 0, 0 },
110 { UNIFORM, "shadow", "sampler2DShadow", 0, 0 },
111 { UNIFORM, "shadow_darkness", "float", 0, 0 },
112 { UNIFORM, "normalmap", "sampler2D", 0, 0 },
113 { UNIFORM, "environment", "samplerCube", 0, 0 },
114 { UNIFORM, "env_eye_matrix", "mat3", 0, 0 },
115 { UNIFORM, "reflectivity", "float", 0, 0 },
116 { UNIFORM, "eye_obj_matrix", "mat4", "gl_ModelViewMatrix", 0 },
117 { UNIFORM, "eye_obj_normal_matrix", "mat3", "gl_NormalMatrix", 0 },
118 { UNIFORM, "projection_matrix", "mat4", "gl_ProjectionMatrix", 0 },
119 { UNIFORM, "shd_eye_matrix", "mat4", 0, 0 },
120 { UNIFORM, "light_sources", "struct { vec4 position; vec4 diffuse; vec4 specular; }[MAX_LIGHTS]", "gl_LightSource[i]", 0 },
121 { UNIFORM, "ambient_color", "vec4", 0, 0 },
122 { UNIFORM, "material", "struct { vec4 ambient; vec4 diffuse; vec4 specular; float shininess; }", "gl_FrontMaterial", 0 },
125 { NO_SCOPE, 0, 0, 0, 0 }
128 const char ProgramBuilder::interfaces[] = { 0, 0, 0, 'v', 0 };
130 ProgramBuilder::ProgramBuilder(const StandardFeatures &f):
132 feature_flags(features.create_flags()),
135 if(!features.custom.empty())
137 const char *whitespace = " \t\n";
138 string::size_type start = 0;
141 start = features.custom.find_first_not_of(whitespace, start);
142 if(start==string::npos)
145 string::size_type semicolon = features.custom.find(';', start);
151 else if(semicolon==string::npos)
152 throw invalid_variable_definition(features.custom.substr(start));
154 string::size_type equals = features.custom.find('=', start);
156 equals = string::npos;
158 VariableDefinition var;
159 string::size_type decl_end = min(equals, semicolon);
160 for(unsigned i=0;; ++i)
162 string::size_type word_end = features.custom.find_first_of(whitespace, start);
163 word_end = min(word_end, decl_end);
164 features.custom[word_end] = 0;
166 const char *word = &features.custom[start];
169 if(!strcmp(word, "uniform"))
171 else if(!strcmp(word, "attribute"))
172 var.scope = ATTRIBUTE;
173 else if(!strcmp(word, "vertex"))
175 else if(!strcmp(word, "fragment"))
176 var.scope = FRAGMENT;
178 throw invalid_variable_definition(word);
185 start = features.custom.find_first_not_of(whitespace, word_end+1);
190 if(equals!=string::npos)
192 start = features.custom.find_first_not_of(whitespace, equals+1);
194 throw invalid_variable_definition("no expression");
195 features.custom[semicolon] = 0;
196 var.expression = &features.custom[start];
202 for(const VariableDefinition *j=standard_variables; j->name; ++j)
203 if(!strcmp(var.name, j->name))
206 custom_variables.push_front(var);
213 void ProgramBuilder::set_optimize(bool o)
218 Program *ProgramBuilder::create_program() const
220 Program *prog = new Program;
225 void ProgramBuilder::add_shaders(Program &prog) const
227 list<ShaderVariable> variables;
228 list<ShaderVariable *> resolved_vars;
230 variables.push_front(ShaderVariable("gl_Position"));
231 variables.push_front(ShaderVariable(features.legacy ? "gl_FragColor" : "frag_color"));
233 list<VariableDefinition>::const_iterator next_custom = custom_variables.begin();
234 for(const VariableDefinition *i=standard_variables; i->name; )
236 const VariableDefinition *def = 0;
237 if(next_custom!=custom_variables.end() && (!strcmp(next_custom->name, i->name) || !next_custom->flags))
247 // Skip over anything that isn't used with the supplied flags
248 if(def->flags && !evaluate_flags(def->flags))
252 // See if this variable can satisfy any unresolved variables
253 ShaderVariable *last_resolved = 0;
254 for(list<ShaderVariable>::iterator j=variables.begin(); j!=variables.end(); ++j)
259 if(!name_match(def->name, j->resolved_name.c_str()))
264 /* We've already resolved a non-fuzzy variable in this iteration.
265 If there are multiple variables that can be resolved, they refer
266 to the same variable. */
267 j->resolve(*last_resolved);
272 resolved_vars.push_front(&*j);
279 vector<string> identifiers = extract_identifiers(def->expression);
280 for(vector<string>::const_iterator k=identifiers.begin(); k!=identifiers.end(); ++k)
282 // Use an existing variable if possible, but only if it's not fuzzy
283 ShaderVariable *var = 0;
284 for(list<ShaderVariable>::iterator l=variables.begin(); (!var && l!=variables.end()); ++l)
285 if(!l->fuzzy_space && l->resolved_name==*k)
290 variables.push_back(ShaderVariable(*k));
291 var = &variables.back();
293 j->add_reference(*var);
298 // Array sizes need to be resolved for inline processing
299 for(list<ShaderVariable>::iterator i=variables.end(); i!=variables.begin(); )
300 (--i)->resolve_array(features);
302 for(list<ShaderVariable *>::const_iterator i=resolved_vars.begin(); i!=resolved_vars.end(); ++i)
303 (*i)->check_inline(features.legacy, !optimize);
305 prog.attach_shader_owned(new VertexShader(create_source(resolved_vars, VERTEX)));
306 prog.attach_shader_owned(new FragmentShader(create_source(resolved_vars, FRAGMENT)));
310 prog.bind_fragment_data(0, "frag_color");
311 prog.bind_attribute(VERTEX4, "vertex");
312 if(features.lighting)
313 prog.bind_attribute(NORMAL3, "normal");
314 else if(features.material)
315 prog.bind_attribute(COLOR4_FLOAT, "color");
316 if(features.texture || features.normalmap)
317 prog.bind_attribute(TEXCOORD4, "texcoord");
319 if(features.normalmap)
321 prog.bind_attribute(get_component_type(TANGENT3), "tangent");
322 prog.bind_attribute(get_component_type(BINORMAL3), "binormal");
326 string ProgramBuilder::create_source(const list<ShaderVariable *> &variables, VariableScope scope) const
331 source += "#version 130\n";
333 for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
334 if((*i)->variable->scope==UNIFORM && (*i)->is_referenced_from(scope) && !(*i)->inlined)
335 source += format("uniform %s;\n", (*i)->create_declaration());
337 /* Interface variables need to have global declarations. */
338 for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
340 if(!(*i)->resolved_name.compare(0, 3, "gl_"))
343 InterfaceFlags interface = (*i)->get_interface_flags(scope);
347 const char *qualifier = (features.legacy ? scope==VERTEX ? "attribute" : "varying" : "in");
348 source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope-1]));
353 const char *qualifier = (features.legacy ? "varying" : "out");
354 source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope]));
358 source += "void main()\n{\n";
360 list<ShaderVariable *> loop_vars;
361 unsigned loop_size = 0;
362 for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
364 if(!loop_vars.empty() && !loop_vars.back()->in_loop && (*i)->array_size!=loop_size)
366 /* Declare all variables that need to be visible outside the loop.
367 Output variables are already declared. */
368 for(list<ShaderVariable *>::const_iterator j=loop_vars.begin(); j!=loop_vars.end(); ++j)
370 InterfaceFlags interface = (*j)->get_interface_flags(scope);
371 if(!(*j)->in_loop && !(interface&OUTPUT))
372 source += format("\t%s;\n", (*j)->create_declaration());
375 source += format("\tfor(int i=0; i<%d; ++i)\n\t{\n", loop_size);
376 for(list<ShaderVariable *>::const_iterator j=loop_vars.begin(); j!=loop_vars.end(); ++j)
378 if((*j)->variable->scope==scope && !(*j)->inlined)
382 decl = (*j)->create_declaration(0, true);
385 decl = (*j)->resolved_name;
389 const char *oper = ((*j)->array_sum ? "+=" : "=");
390 source += format("\t\t%s %s %s;\n", decl, oper, (*j)->create_expression("i"));
393 InterfaceFlags interface = (*j)->get_interface_flags(scope);
396 string expr = ((*j)->inlined ? (*j)->create_expression("i") : (*j)->resolved_name+"[i]");
397 source += format("\t\t%c_%s[i] = %s;\n", interfaces[scope], (*j)->resolved_name, expr);
405 InterfaceFlags interface = (*i)->get_interface_flags(scope);
407 if((*i)->array_size>1)
409 if((*i)->variable->scope==scope || (interface&OUTPUT))
411 loop_size = (*i)->array_size;
412 loop_vars.push_back(*i);
417 if((*i)->variable->scope==scope && !(*i)->inlined)
419 string decl = ((interface&GOAL) ? (*i)->resolved_name : (*i)->create_declaration());
420 source += format("\t%s = %s;\n", decl, (*i)->create_expression());
423 if((interface&(OUTPUT|GOAL))==OUTPUT)
425 string expr = ((*i)->inlined ? (*i)->create_expression() : (*i)->resolved_name);
426 source += format("\t%c_%s = %s;\n", interfaces[scope], (*i)->resolved_name, expr);
435 bool ProgramBuilder::evaluate_flags(const char *flags) const
442 for(const char *i=flags; *i; ++i)
444 if(*i>='a' && *i<='z')
446 bool found = (feature_flags.find(*i)!=string::npos);
448 cond = (cond || found);
450 cond = (cond && !found);
452 cond = (cond && found);
462 ProgramBuilder::MatchType ProgramBuilder::name_match(const char *n1, const char *n2, const char **space)
469 if(*n1==*n2 || *n1=='z' || *n2=='z')
473 int side = (*n1=='z' ? 1 : 2);
486 else if(i>=zzz+3 || side!=zside)
496 return (!*n1 && !*n2) ? (zzz>=0 ? FUZZY : EXACT) : ((*n1=='[' || *n2=='[') ? ARRAY : NO_MATCH);
499 bool ProgramBuilder::parse_identifier(const char *ptr, unsigned &start, unsigned &length)
503 bool subscript = false;
504 for(const char *i=ptr;; ++i)
510 if(isalpha(*i) || *i=='_')
529 length = i+1-(ptr+start);
532 else if(!isalpha(*i) || i>ptr+start+length+1)
535 else if(!isalnum(*i) && *i!='_')
537 length = i-(ptr+start);
547 vector<string> ProgramBuilder::extract_identifiers(const char *expression)
549 vector<string> result;
550 const char *ptr = expression;
553 while(parse_identifier(ptr, start, length))
555 result.push_back(string(ptr+start, length));
561 string ProgramBuilder::replace_identifiers(const char *expression, const map<string, string> &replace_map)
564 const char *ptr = expression;
567 while(parse_identifier(ptr, start, length))
569 result.append(ptr, start);
570 string identifier(ptr+start, length);
571 map<string, string>::const_iterator i = replace_map.find(identifier);
572 if(i!=replace_map.end())
575 result += identifier;
583 ProgramBuilder::StandardFeatures::StandardFeatures():
592 legacy(!(get_glsl_version()>=Version(1, 30)))
595 string ProgramBuilder::StandardFeatures::create_flags() const
621 ProgramBuilder::ShaderVariable::ShaderVariable(const std::string &n):
625 fuzzy_space(name.find("zzz")!=string::npos),
629 inline_parens(false),
632 string::size_type bracket = name.find('[');
633 if(bracket!=string::npos)
634 array_subscript = name.substr(bracket+1, name.size()-bracket-2);
637 void ProgramBuilder::ShaderVariable::resolve(const VariableDefinition &var)
640 const char *space = 0;
641 MatchType match = name_match(var.name, resolved_name.c_str(), &space);
644 resolve_space(string(space, 3));
645 else if(match==ARRAY)
647 if(array_subscript.empty())
649 else if(var.scope==UNIFORM)
651 const char *bracket = strrchr(variable->type, '[');
653 array_subscript = string(bracket+1, strlen(bracket)-2);
658 void ProgramBuilder::ShaderVariable::resolve(ShaderVariable &var)
660 for(list<ShaderVariable *>::iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
661 (*i)->update_reference(*this, var);
662 var.referenced_by.insert(var.referenced_by.end(), referenced_by.begin(), referenced_by.end());
665 void ProgramBuilder::ShaderVariable::resolve_space(const string &space)
669 resolved_space = space;
671 string::size_type zzz = resolved_name.find("zzz");
672 resolved_name.replace(zzz, 3, resolved_space);
675 // Resolving the space could have affected other variables that use this one
676 for(list<ShaderVariable *>::iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
677 (*i)->resolve_space(space);
680 for(list<ShaderVariable *>::iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
681 if((*i)->fuzzy_space)
682 (*i)->resolve_space(space);
685 void ProgramBuilder::ShaderVariable::resolve_array(const StandardFeatures &features, unsigned size_hint)
689 if(!array_sum && array_subscript.empty())
692 if(!array_subscript.empty())
694 string::size_type bracket = resolved_name.find('[');
695 if(bracket!=string::npos)
696 resolved_name = resolved_name.substr(0, bracket);
699 if(variable && variable->scope==UNIFORM)
701 if(array_subscript=="MAX_LIGHTS")
702 array_size = features.max_lights;
703 else if(isnumrc(array_subscript))
704 array_size = lexical_cast<unsigned>(array_subscript);
706 throw invalid_variable_definition("invalid array size");
711 for(list<ShaderVariable *>::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
714 array_size = (*i)->array_size;
719 if(!array_size && size_hint)
720 array_size = size_hint;
724 for(list<ShaderVariable *>::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
725 if(!(*i)->array_subscript.empty() && !(*i)->array_size)
726 (*i)->resolve_array(features, array_size);
730 void ProgramBuilder::ShaderVariable::add_reference(ShaderVariable &var)
732 referenced_vars.push_back(&var);
733 var.referenced_by.push_back(this);
734 if(var.fuzzy_space && !resolved_space.empty())
735 var.resolve_space(resolved_space);
738 void ProgramBuilder::ShaderVariable::update_reference(ShaderVariable &from, ShaderVariable &to)
740 replace(referenced_vars.begin(), referenced_vars.end(), &from, &to);
741 replace(referenced_by.begin(), referenced_by.end(), &from, &to);
742 if(from.fuzzy_space && !to.fuzzy_space && !to.resolved_space.empty())
743 resolve_space(to.resolved_space);
746 void ProgramBuilder::ShaderVariable::check_inline(bool allow_legacy, bool trivial_only)
748 if(variable->expression)
750 if(array_sum && array_size>1)
752 if(!allow_legacy && !strncmp(variable->expression, "gl_", 3))
755 // Never inline goal variables
756 if(referenced_by.empty())
759 // Inline an expression consisting of a single identifier
760 unsigned start, length;
761 if(parse_identifier(variable->expression, start, length))
762 if(start==0 && variable->expression[length]==0)
771 /* If all references to the variable come from arrays in the same scope
772 and of the same size, the variable can be embedded in the loop. */
773 in_loop = (array_size>1 && !array_sum);
774 for(list<ShaderVariable *>::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
775 if((*i)->variable->scope!=variable->scope || (*i)->array_size!=array_size)
778 /* Count all refs to this variable. Refs from array variables count once
779 per loop iteration. */
780 unsigned total_refs = 0;
781 unsigned in_scope_refs = 0;
782 for(list<ShaderVariable *>::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
784 unsigned count = max((*i)->array_size*!in_loop, 1U);
786 if((*i)->variable->scope==variable->scope)
787 in_scope_refs += count;
790 /* Inline if there's only one ref, or if all refs are in other scopes.
791 In the latter case, the actual inlining will happen in the interface
792 variable assignment. */
793 if(total_refs==1 || in_scope_refs==0)
797 for(const char *c=variable->expression; (!inline_parens && *c); ++c)
803 else if(level==0 && !isalnum(*c) && *c!='_' && *c!='.')
804 inline_parens = true;
810 bool ProgramBuilder::ShaderVariable::is_referenced_from(VariableScope scope) const
812 for(list<ShaderVariable *>::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
813 if((*i)->variable->scope==scope)
818 ProgramBuilder::InterfaceFlags ProgramBuilder::ShaderVariable::get_interface_flags(VariableScope scope) const
820 /* Uniforms are available to all stages and are not passed through
822 if(variable->scope==UNIFORM)
825 int flags = NO_INTERFACE;
827 for(list<ShaderVariable *>::const_iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
829 /* Variables used in a later scope than they are declared in need to go
830 through the interface */
831 if((*i)->variable->scope>scope && variable->scope<=scope)
833 if((*i)->variable->scope>=scope && variable->scope<scope)
834 if(!inlined || variable->scope!=ATTRIBUTE || scope!=VERTEX)
838 // Variables without any references are goals and also outputs.
839 if(referenced_by.empty() && variable->scope==scope)
840 flags |= OUTPUT|GOAL;
842 return static_cast<InterfaceFlags>(flags);
845 string ProgramBuilder::ShaderVariable::create_declaration(char interface, bool loop) const
847 if(variable->scope==UNIFORM && !array_subscript.empty())
849 const char *bracket = strrchr(variable->type, '[');
851 return format("%s %s[%d]", string(variable->type, bracket), resolved_name, array_size);
855 if(!array_sum && array_size>1 && !loop)
856 array = format("[%d]", array_size);
859 return format("%s %c_%s%s", variable->type, interface, resolved_name, array);
861 return format("%s %s%s", variable->type, resolved_name, array);
864 string ProgramBuilder::ShaderVariable::create_replacement(VariableScope from_scope, const char *loop) const
866 string replacement = resolved_name;
867 InterfaceFlags interface = NO_INTERFACE;
870 interface = get_interface_flags(from_scope);
871 if((interface&INPUT) && interfaces[from_scope-1])
872 replacement = format("%c_%s", interfaces[from_scope-1], replacement);
875 replacement = create_expression(loop);
877 replacement = "("+replacement+")";
882 // Add an array subscript, unless the variable is embedded in a loop
883 if(!array_subscript.empty() && !in_loop)
886 return format("%s[%s]", replacement, loop);
887 else if(!variable || variable->scope==UNIFORM)
888 return replacement+"[0]";
894 string ProgramBuilder::ShaderVariable::create_expression(const char *loop) const
896 map<string, string> replace_map;
897 for(list<ShaderVariable *>::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
899 string replacement = (*i)->create_replacement(variable->scope, loop);
900 if(replacement!=(*i)->name)
901 replace_map[(*i)->name] = replacement;
904 if(replace_map.empty())
905 return variable->expression;
907 return replace_identifiers(variable->expression, replace_map);
911 ProgramBuilder::StandardFeatures::Loader::Loader(StandardFeatures &f):
912 DataFile::ObjectLoader<StandardFeatures>(f)
914 add("custom", &StandardFeatures::custom);
915 add("lighting", &StandardFeatures::lighting);
916 add("material", &StandardFeatures::material);
917 add("max_lights", &StandardFeatures::max_lights);
918 add("normalmap", &StandardFeatures::normalmap);
919 add("reflection", &StandardFeatures::reflection);
920 add("shadow", &StandardFeatures::shadow);
921 add("specular", &StandardFeatures::specular);
922 add("texture", &StandardFeatures::texture);