+++ /dev/null
-#include <algorithm>
-#include <cstring>
-#include <set>
-#include <msp/gl/extensions/arb_uniform_buffer_object.h>
-#include <msp/strings/format.h>
-#include <msp/strings/utils.h>
-#include "extension.h"
-#include "program.h"
-#include "programbuilder.h"
-#include "shader.h"
-#include "vertexformat.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
-/*
-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", 0 },
- { FRAGMENT, "frag_color", "vec4", "incoming_color", "!f" },
- { FRAGMENT, "frag_color", "vec4", "vec4(mix(fog_color.rgb, incoming_color.rgb, fog_value), incoming_color.a)", "f" },
- { FRAGMENT, "fog_value", "float", "exp(-fog_coord*fog_density)", 0 },
-
- { FRAGMENT, "incoming_color", "vec4", "basic_color", "!e!l" },
- { FRAGMENT, "incoming_color", "vec4", "vec4(rgb_surface, surface_alpha)", "!el" },
- { FRAGMENT, "incoming_color", "vec4", "vec4(rgb_surface+rgb_reflection, surface_alpha)", "e" },
-
- { FRAGMENT, "rgb_reflection", "vec3", "reflect_sample.rgb*reflectivity", 0 },
- { 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, "rgb_surface", "vec3", "rgb_unlit_surface", "!l" },
- { FRAGMENT, "rgb_surface", "vec3", "rgb_lit_surface", "l" },
- { FRAGMENT, "rgb_unlit_surface", "vec3", "basic_color.rgb", "!s" },
- { FRAGMENT, "rgb_unlit_surface", "vec3", "basic_color.rgb*l_shadow", "s" },
- { FRAGMENT, "rgb_lit_surface", "vec3", "rgb_illumination_diffuse", "!m!t" },
- { FRAGMENT, "rgb_lit_surface", "vec3", "rgb_illumination_diffuse*diffuse_sample.rgb", "!mt" },
- { FRAGMENT, "rgb_lit_surface", "vec3", "rgb_surface_ambient+rgb_surface_diffuse", "m!p" },
- { FRAGMENT, "rgb_lit_surface", "vec3", "rgb_surface_ambient+rgb_surface_diffuse+rgb_surface_specular", "mp" },
-
- { FRAGMENT, "surface_alpha", "float", "basic_color.a", "!m" },
- { FRAGMENT, "surface_alpha", "float", "basic_color.a", "m!l" },
- { FRAGMENT, "surface_alpha", "float", "material.diffuse.a", "ml!t" },
- { FRAGMENT, "surface_alpha", "float", "material.diffuse.a*diffuse_sample.a", "mlt" },
- { FRAGMENT, "basic_color", "vec4", "vec4(1.0)", "!m!t" },
- { FRAGMENT, "basic_color", "vec4", "diffuse_sample", "!mt" },
- { FRAGMENT, "basic_color", "vec4", "color", "m!t" },
- { FRAGMENT, "basic_color", "vec4", "color*diffuse_sample", "mt" },
-
- { FRAGMENT, "rgb_surface_ambient", "vec3", "rgb_illumination_ambient*material.ambient.rgb", "!t" },
- { FRAGMENT, "rgb_surface_ambient", "vec3", "rgb_illumination_ambient*material.ambient.rgb*diffuse_sample.rgb", "t" },
- { FRAGMENT, "rgb_illumination_ambient", "vec3", "ambient_color.rgb", "!y" },
- { FRAGMENT, "rgb_illumination_ambient", "vec3", "ambient_color.rgb+l_skylight*sky_color.rgb", "y" },
- { FRAGMENT, "l_skylight", "float", "dot(n_zzz_normal, zzz_sky_dir)*0.5+0.5", 0 },
-
- { FRAGMENT, "rgb_surface_specular", "vec3", "rgb_illumination_specular*material.specular.rgb", 0 },
- { FRAGMENT, "rgb_illumination_specular", "vec3", "rgb_illumination_specular_direct", "!y|e" },
- { FRAGMENT, "rgb_illumination_specular", "vec3", "rgb_illumination_specular_direct+l_sky_specular*sky_color.rgb", "y!e" },
- { FRAGMENT, "rgb_illumination_specular_direct", "vec3", "rgb_light_specular", "!s" },
- { FRAGMENT, "rgb_illumination_specular_direct", "vec3", "rgb_light_specular*l_shadow", "s" },
- { FRAGMENT, "rgb_light_specular[i]", "vec3", "l_specular[i]*light_sources[i].specular.rgb", 0 },
- { FRAGMENT, "l_sky_specular", "float", "pow((1.0-pow(clamp(dot(zzz_reflect_dir, zzz_sky_dir)-horizon_limit, -1.0, 0.0), 2.0)), material.shininess/2.0)", 0 },
- { FRAGMENT, "l_specular[i]", "float", "pow(max(dot(n_zzz_half_vec[i], n_zzz_normal), 0.0), material.shininess)", 0 },
-
- { FRAGMENT, "rgb_surface_diffuse", "vec3", "rgb_illumination_diffuse*material.diffuse.rgb", "!t" },
- { FRAGMENT, "rgb_surface_diffuse", "vec3", "rgb_illumination_diffuse*material.diffuse.rgb*diffuse_sample.rgb", "t" },
- { FRAGMENT, "rgb_illumination_diffuse", "vec3", "rgb_light_diffuse", "!s" },
- { FRAGMENT, "rgb_illumination_diffuse", "vec3", "rgb_light_diffuse*l_shadow", "s" },
- { FRAGMENT, "rgb_light_diffuse[i]", "vec3", "l_diffuse[i]*light_sources[i].diffuse.rgb", 0 },
- { FRAGMENT, "l_diffuse[i]", "float", "max(dot(n_zzz_normal, n_zzz_light_dir[i]), 0.0)", 0 },
-
- { FRAGMENT, "l_shadow", "float", "mix(1.0, shadow_sample, shadow_darkness)", 0 },
- { FRAGMENT, "shadow_sample", "float", "shadow2D(shadow, shd_vertex)", 0 },
-
- { FRAGMENT, "zzz_reflect_dir", "vec3", "reflect(zzz_incident_dir, n_zzz_normal)", 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(normal_map, texture_coord).xyz", 0 },
- { FRAGMENT, "diffuse_sample", "vec4", "texture2D(diffuse_map, texture_coord)", 0 },
-
- { VERTEX, "gl_Position", "vec4", "projection_matrix*eye_vertex", 0 },
- { VERTEX, "gl_ClipDistance[i]", "float", "dot(eye_vertex, clip_planes[i].equation)", "c" },
- { VERTEX, "fog_coord", "float", "-eye_vertex.z", 0 },
- { VERTEX, "shd_vertex", "vec3", "(shd_eye_matrix*eye_vertex).xyz", 0 },
- { VERTEX, "tbn_sky_dir", "vec3", "eye_sky_dir*eye_tbn_matrix", "n" },
- { 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, "diffuse_map", "sampler2D", 0, 0 },
- { UNIFORM, "shadow", "sampler2DShadow", 0, 0 },
- { UNIFORM, "ShadowMap::shadow_darkness", "float", 0, 0 },
- { UNIFORM, "normal_map", "sampler2D", 0, 0 },
- { UNIFORM, "environment", "samplerCube", 0, 0 },
- { UNIFORM, "EnvMap::env_eye_matrix", "mat3", 0, 0 },
- { UNIFORM, "Material::reflectivity", "float", 0, 0 },
- { UNIFORM, "eye_obj_matrix", "mat4", "gl_ModelViewMatrix", 0 },
- { UNIFORM, "eye_obj_normal_matrix", "mat3", "gl_NormalMatrix", 0 },
- { UNIFORM, "Transform::projection_matrix", "mat4", "gl_ProjectionMatrix", 0 },
- { UNIFORM, "ShadowMap::shd_eye_matrix", "mat4", 0, 0 },
- { UNIFORM, "Lighting::light_sources", "LightSourceParameters[MAX_LIGHTS]", "gl_LightSource[i]", 0 },
- { UNIFORM, "Lighting::ambient_color", "vec4", "gl_LightModel.ambient", 0 },
- { UNIFORM, "Lighting::sky_color", "vec4", 0, 0 },
- { UNIFORM, "Lighting::eye_sky_dir", "vec3", 0, 0 },
- { UNIFORM, "Lighting::horizon_limit", "float", 0, 0 },
- { UNIFORM, "Lighting::fog_color", "vec4", "gl_Fog.color", 0 },
- { UNIFORM, "Lighting::fog_density", "float", "gl_Fog.density", 0 },
- { UNIFORM, "Material::material", "MaterialParameters", "gl_FrontMaterial", 0 },
- { UNIFORM, "Clipping::clip_planes", "ClipPlane[MAX_CLIP_PLANES]", 0, 0 },
-
- { TYPE, "LightSourceParameters", "struct { vec4 position; vec4 diffuse; vec4 specular; }", "gl_LightSourceParameters", 0 },
- { TYPE, "MaterialParameters", "struct { vec4 ambient; vec4 diffuse; vec4 specular; float shininess; }", "gl_MaterialParameters", 0 },
- { TYPE, "ClipPlane", "struct { vec4 equation; }", 0, 0 },
-
- // Terminator entry
- { NO_SCOPE, 0, 0, 0, 0 }
-};
-
-const char ProgramBuilder::interfaces[] = { 0, 0, 0, 0, 0, 'v', 'g', 0 };
-
-ProgramBuilder::ProgramBuilder(const StandardFeatures &f):
- features(f),
- feature_flags(features.create_flags()),
- enabled_scopes((1<<N_SCOPES)-1),
- 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 if(!strcmp(word, "function"))
- var.scope = FUNCTION;
- 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 || (var.scope==FUNCTION && features.custom[start]=='('))
- break;
- }
-
- if(equals!=string::npos)
- {
- if(var.scope==FUNCTION)
- throw invalid_variable_definition("function with expression");
- 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 if(var.scope==FUNCTION)
- {
- string::size_type left_paren = features.custom.find('(', start);
- string::size_type right_paren = features.custom.find(')', start);
- if(left_paren>semicolon || right_paren>semicolon)
- throw invalid_variable_definition("no argument list");
- features.custom[right_paren] = 0;
- var.expression = &features.custom[left_paren+1];
- }
- 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;
- }
- }
-
- if(!features.geometry)
- enabled_scopes &= ~(1<<GEOMETRY);
-
- if(!features.legacy)
- {
- aliases["texture1D"] = "texture";
- aliases["texture2D"] = "texture";
- aliases["texture3D"] = "texture";
- aliases["textureCube"] = "texture";
- aliases["shadow2D"] = "texture";
- }
- else
- aliases["shadow2D"] = "shadow2D(...).r";
-}
-
-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<ShaderVariable> variables;
- list<ShaderVariable *> resolved_vars;
-
- if(features.clipping)
- variables.push_back(ShaderVariable("gl_ClipDistance[i]"));
- variables.push_front(ShaderVariable("gl_Position"));
- variables.push_front(ShaderVariable(features.legacy ? "gl_FragColor" : "frag_color"));
-
- list<VariableDefinition>::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;
- }
-
- if(def->scope==TYPE)
- {
- for(list<ShaderVariable *>::iterator j=resolved_vars.begin(); j!=resolved_vars.end(); ++j)
- if(!(*j)->type && name_match(def->name, (*j)->variable->type))
- (*j)->resolve_type(*def);
-
- continue;
- }
-
- const char *def_uq_name = unqualified_name(def->name);
-
- // See if this variable can satisfy any unresolved variables
- ShaderVariable *last_resolved = 0;
- for(list<ShaderVariable>::iterator j=variables.begin(); j!=variables.end(); ++j)
- {
- if(j->variable)
- continue;
-
- if(!name_match(def_uq_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<string> identifiers = extract_identifiers(def->expression);
- for(vector<string>::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<ShaderVariable>::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<ShaderVariable>::iterator i=variables.end(); i!=variables.begin(); )
- (--i)->resolve_array(features);
-
- bool legacy_variables = evaluate_flags("g");
- for(list<ShaderVariable *>::const_iterator i=resolved_vars.begin(); i!=resolved_vars.end(); ++i)
- (*i)->check_inline(legacy_variables, !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)
- {
- // OpenGL ES does not support binding fragment shader outputs
- if(get_gl_api()!=OPENGL_ES2)
- 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.normal_map)
- prog.bind_attribute(TEXCOORD4, "texcoord");
- }
- if(features.normal_map)
- {
- prog.bind_attribute(get_component_type(TANGENT3), "tangent");
- prog.bind_attribute(get_component_type(BINORMAL3), "binormal");
- }
-}
-
-string ProgramBuilder::create_source(const list<ShaderVariable *> &variables, VariableScope scope) const
-{
- string source;
-
- bool use_blocks = !features.legacy && ARB_uniform_buffer_object;
-
- if(!features.legacy)
- {
- if(get_gl_api()==OPENGL_ES2)
- {
- if(use_blocks)
- source += "#version 300 es\n";
- }
- else
- {
- source += "#version 130\n";
- if(use_blocks)
- source += "#extension GL_ARB_uniform_buffer_object: require\n";
- }
- }
-
- if(get_gl_api()==OPENGL_ES2)
- source += "precision mediump float;\n";
-
- set<const VariableDefinition *> declared_types;
- set<string> uniform_blocks;
- for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
- {
- if(!(*i)->is_referenced_from(scope))
- continue;
-
- if((*i)->variable->scope==FUNCTION)
- source += format("%s;\n", (*i)->create_declaration());
- else if((*i)->variable->scope==UNIFORM && !(*i)->inlined)
- {
- if((*i)->type && !declared_types.count((*i)->type))
- {
- source += format("%s;\n", (*i)->create_type_declaration());
- declared_types.insert((*i)->type);
- }
-
- if(!(*i)->resolved_block.empty() && use_blocks)
- uniform_blocks.insert((*i)->resolved_block);
- else
- source += format("uniform %s;\n", (*i)->create_declaration());
- }
- }
-
- for(set<string>::const_iterator i=uniform_blocks.begin(); i!=uniform_blocks.end(); ++i)
- {
- source += format("uniform %s\n{\n", *i);
- for(list<ShaderVariable *>::const_iterator j=variables.begin(); j!=variables.end(); ++j)
- if((*j)->resolved_block==*i)
- source += format("\t%s;\n", (*j)->create_declaration());
- source += "};\n";
- }
-
- /* Interface variables need to have global declarations. */
- for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
- {
- if(!(*i)->resolved_name.compare(0, 3, "gl_"))
- continue;
-
- InterfaceFlags iface = (*i)->get_interface_flags(scope);
-
- if(iface&INPUT)
- {
- const char *qualifier = (features.legacy ? scope==VERTEX ? "attribute" : "varying" : "in");
- source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[previous_scope(scope, enabled_scopes)]));
- }
-
- if(iface&OUTPUT)
- {
- const char *qualifier = (features.legacy ? "varying" : "out");
- source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope]));
- }
- }
-
- // The clip distance array must be declared manually to give it a size
- if(scope==VERTEX && features.clipping)
- source += format("out float gl_ClipDistance[%d];\n", features.max_clip_planes);
-
- source += "void main()\n{\n";
-
- list<ShaderVariable *> loop_vars;
- unsigned loop_size = 0;
- for(list<ShaderVariable *>::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<ShaderVariable *>::const_iterator j=loop_vars.begin(); j!=loop_vars.end(); ++j)
- {
- InterfaceFlags iface = (*j)->get_interface_flags(scope);
- if(!(*j)->in_loop && !(iface&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<ShaderVariable *>::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, create_expression(**j, "i"));
- }
-
- InterfaceFlags iface = (*j)->get_interface_flags(scope);
- if((iface&(OUTPUT|GOAL))==OUTPUT)
- {
- string expr = ((*j)->inlined ? create_expression(**j, "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 iface = (*i)->get_interface_flags(scope);
-
- if((*i)->array_size>1 || ((*i)->array_size==1 && (iface&GOAL)))
- {
- if((*i)->variable->scope==scope || (iface&OUTPUT))
- {
- loop_size = (*i)->array_size;
- loop_vars.push_back(*i);
- }
- continue;
- }
-
- if((*i)->variable->scope==scope && !(*i)->inlined)
- {
- string decl = ((iface&GOAL) ? (*i)->resolved_name : (*i)->create_declaration());
- source += format("\t%s = %s;\n", decl, create_expression(**i));
- }
-
- if((iface&(OUTPUT|GOAL))==OUTPUT)
- {
- string expr = ((*i)->inlined ? create_expression(**i) : (*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;
-}
-
-const char *ProgramBuilder::unqualified_name(const char *name)
-{
- for(const char *p=name; *p; ++p)
- if(*p==':' && *++p==':')
- name = p+1;
- return name;
-}
-
-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<string> ProgramBuilder::extract_identifiers(const char *expression)
-{
- vector<string> 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<string, string> &replace_map, bool with_functions)
-{
- 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<string, string>::const_iterator i = replace_map.find(identifier);
- if(i!=replace_map.end())
- {
- if(with_functions && ptr[start+length]=='(')
- {
- string::size_type lparen = i->second.find('(');
- string::size_type rparen = i->second.rfind(')');
- if(lparen!=string::npos && rparen!=string::npos)
- {
- unsigned level = 1;
- unsigned j;
- for(j=start+length+1; (ptr[j] && level); ++j)
- {
- level += (ptr[j]=='(');
- level -= (ptr[j]==')');
- }
-
- if(!level)
- {
- string subexpr(ptr+start+length, ptr+j);
- result += i->second.substr(0, lparen);
- result += replace_identifiers(subexpr.c_str(), replace_map, with_functions);
- result += i->second.substr(rparen+1);
- ptr += j;
- continue;
- }
- }
- }
-
- result += i->second;
- }
- else
- result += identifier;
- ptr += start+length;
- }
- result += ptr;
- return result;
-}
-
-ProgramBuilder::VariableScope ProgramBuilder::previous_scope(VariableScope scope, unsigned enabled_scopes)
-{
- while(scope!=NO_SCOPE)
- {
- scope = static_cast<VariableScope>(scope-1);
- if(enabled_scopes&(1<<scope))
- break;
- }
-
- return scope;
-}
-
-string ProgramBuilder::create_expression(const ShaderVariable &var, const char *loop) const
-{
- string expr = var.create_expression(enabled_scopes, loop);
- return replace_identifiers(expr.c_str(), aliases, true);
-}
-
-
-ProgramBuilder::StandardFeatures::StandardFeatures():
- texture(false),
- material(false),
- lighting(false),
- max_lights(1),
- skylight(false),
- fog(false),
- specular(false),
- normal_map(false),
- shadow(false),
- reflection(false),
- clipping(false),
- max_clip_planes(1),
- geometry(false)
-{
- if(get_gl_api()==OPENGL_ES2)
- legacy = get_glsl_version()<Version(3, 0);
- else
- 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(skylight)
- flags += 'y';
- if(specular)
- flags += 'p';
- if(normal_map)
- flags += 'n';
- }
- if(fog)
- flags += 'f';
- if(shadow)
- flags += 's';
- if(reflection)
- flags += 'e';
- if(clipping)
- flags += 'c';
- if(legacy && get_gl_api()==OPENGL)
- flags += 'g';
-
- return flags;
-}
-
-
-ProgramBuilder::ShaderVariable::ShaderVariable(const std::string &n):
- name(n),
- variable(0),
- type(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;
- const char *var_uq_name = unqualified_name(variable->name);
- MatchType match = name_match(var_uq_name, resolved_name.c_str(), &space);
-
- if(var_uq_name!=variable->name)
- resolved_block.assign(variable->name, var_uq_name-2);
-
- 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<ShaderVariable *>::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_type(const VariableDefinition &var)
-{
- type = &var;
-}
-
-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<ShaderVariable *>::iterator i=referenced_by.begin(); i!=referenced_by.end(); ++i)
- (*i)->resolve_space(space);
- }
-
- for(list<ShaderVariable *>::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 &feat, 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 = feat.max_lights;
- else if(array_subscript=="MAX_CLIP_PLANES")
- array_size = feat.max_clip_planes;
- else if(isnumrc(array_subscript))
- array_size = lexical_cast<unsigned>(array_subscript);
- else
- throw invalid_variable_definition("invalid array size");
- }
-
- if(!array_size)
- {
- for(list<ShaderVariable *>::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<ShaderVariable *>::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
- if(!(*i)->array_subscript.empty() && !(*i)->array_size)
- (*i)->resolve_array(feat, 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 && variable->scope>=UNIFORM)
- {
- 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<ShaderVariable *>::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<ShaderVariable *>::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<ShaderVariable *>::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<ShaderVariable *>::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->scope<scope)
- if(!inlined || variable->scope!=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<InterfaceFlags>(flags);
-}
-
-string ProgramBuilder::ShaderVariable::create_type_declaration() const
-{
- if(!type)
- throw logic_error("no type");
-
- if(!strncmp(type->type, "struct", 6))
- {
- const char *brace = strchr(type->type, '{');
- if(brace)
- return format("struct %s %s", type->name, brace);
- }
-
- throw invalid_variable_definition("invalid typedef");
-}
-
-string ProgramBuilder::ShaderVariable::create_declaration(char iface, bool loop) const
-{
- if(variable->scope==FUNCTION)
- return format("%s %s(%s)", variable->type, resolved_name, variable->expression);
-
- 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(iface)
- return format("%s %c_%s%s", variable->type, iface, resolved_name, array);
- else
- return format("%s %s%s", variable->type, resolved_name, array);
-}
-
-string ProgramBuilder::ShaderVariable::create_replacement(VariableScope from_scope, unsigned scopes, const char *loop) const
-{
- string replacement = resolved_name;
- InterfaceFlags iface = NO_INTERFACE;
- if(variable)
- {
- iface = get_interface_flags(from_scope);
- VariableScope prev_scope = previous_scope(from_scope, scopes);
- if((iface&INPUT) && interfaces[prev_scope])
- replacement = format("%c_%s", interfaces[prev_scope], replacement);
- else if(inlined)
- {
- replacement = create_expression(scopes, 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(unsigned scopes, const char *loop) const
-{
- map<string, string> replace_map;
- for(list<ShaderVariable *>::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
- {
- string replacement = (*i)->create_replacement(variable->scope, scopes, 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<StandardFeatures>(f)
-{
- add("clipping", &StandardFeatures::clipping);
- add("custom", &StandardFeatures::custom);
- add("fog", &StandardFeatures::fog);
- add("geometry", &StandardFeatures::geometry);
- add("lighting", &StandardFeatures::lighting);
- add("material", &StandardFeatures::material);
- add("max_clip_planes", &StandardFeatures::max_clip_planes);
- add("max_lights", &StandardFeatures::max_lights);
- add("normal_map", &StandardFeatures::normal_map);
- add("reflection", &StandardFeatures::reflection);
- add("shadow", &StandardFeatures::shadow);
- add("skylight", &StandardFeatures::skylight);
- add("specular", &StandardFeatures::specular);
- add("texture", &StandardFeatures::texture);
-
- // Deprecated
- add("normalmap", &StandardFeatures::normal_map);
-}
-
-#pragma GCC diagnostic pop
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / commitdiff