#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"
eye_* Eye space
tbn_* Tangent-Binormal-Normal space
shd_* Shadow space
+ env_* Environment space
*_dir Direction vector
zzz_* Wildcard space, resolved by the builder
color_* Color with rgba components
*/
-/* The array are stored in reverse order, so that variables always come after
+/* The array is stored in reverse order, so that variables always come after
anything that might need them. */
-const ProgramBuilder::StandardVariable ProgramBuilder::standard_variables[] =
-{
- { FRAGMENT, "gl_FragColor", 0, "color_base", "!t" },
- { FRAGMENT, "gl_FragColor", 0, "tex_sample", "!l!s!mt" },
- { FRAGMENT, "gl_FragColor", 0, "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_full, 1.0)", "l!m" },
- { FRAGMENT, "color_base", "vec4", "vec4(rgb_light_full, gl_FrontMaterial.diffuse.a)", "lm" },
- { FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow+gl_FrontLightModelProduct.sceneColor.rgb", "m" },
- { FRAGMENT, "rgb_light_full", "vec3", "rgb_light_shadow", "!m" },
- { FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light*l_shadow", "s" },
- { FRAGMENT, "rgb_light_shadow", "vec3", "rgb_light", "!s" },
- { FRAGMENT, "rgb_light", "vec3", "vec3(l_diffuse)", "!m!p" },
- { FRAGMENT, "rgb_light", "vec3", "vec3(l_diffuse+l_specular)", "!mp" },
- { FRAGMENT, "rgb_light", "vec3", "l_diffuse*gl_FrontLightProduct[0].diffuse.rgb", "m!p" },
- { FRAGMENT, "rgb_light", "vec3", "l_diffuse*gl_FrontLightProduct[0].diffuse.rgb+l_specular*gl_FrontLightProduct[0].specular.rgb", "mp" },
+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).r", 0 },
- { FRAGMENT, "l_diffuse", "float", "max(dot(n_zzz_normal, n_zzz_light_dir), 0.0)", 0 },
- { FRAGMENT, "l_specular", "float", "pow(max(dot(n_zzz_half_vec, n_zzz_normal), 0.0), gl_FrontMaterial.shininess)", 0 },
- { FRAGMENT, "n_zzz_half_vec", "vec3", "normalize(zzz_light_dir-zzz_incident_dir)", 0 },
- { FRAGMENT, "n_zzz_light_dir", "vec3", "normalize(zzz_light_dir)", 0 },
- { FRAGMENT, "n_tbn_normal", "vec3", "texture2D(normalmap, texture_coord).xyz*2.0-1.0", "n" },
- { FRAGMENT, "n_eye_normal", "vec3", "normalize(eye_normal)", "!n" },
- { FRAGMENT, "tex_sample", "vec4", "texture2D(texture, texture_coord)", 0 },
+ { FRAGMENT, "shadow_sample", "float", "shadow2D(shadow, shd_vertex)", 0 },
- { VERTEX, "gl_Position", 0, "gl_ProjectionMatrix*eye_vertex", 0 },
- { VERTEX, "shd_vertex", "vec3", "eye_vertex*eye_shd_rmatrix", 0 },
- { VERTEX, "eye_shd_rmatrix", "mat4", "mat4(gl_EyePlaneS[shadow_unit], gl_EyePlaneT[shadow_unit], gl_EyePlaneR[shadow_unit], vec4(0.0, 0.0, 0.0, 1.0))", 0 },
- { VERTEX, "tbn_light_dir", "vec3", "eye_light_dir*eye_tbn_matrix", 0 },
- { VERTEX, "eye_light_dir", "vec3", "normalize(gl_LightSource[0].position.xyz-eye_vertex.xyz*gl_LightSource[0].position.w)", 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", "gl_ModelViewMatrix*gl_Vertex", "!r" },
- { VERTEX, "eye_vertex", "vec4", "transform_vertex(gl_Vertex)", "r" },
- { VERTEX, "eye_normal", "vec3", "gl_NormalMatrix*gl_Normal", "!r" },
- { VERTEX, "eye_normal", "vec3", "transform_normal(gl_Normal)", "r" },
- { VERTEX, "eye_tangent", "vec3", "gl_NormalMatrix*tangent", "!r" },
- { VERTEX, "eye_tangent", "vec3", "transform_normal(tangent)", "r" },
- { VERTEX, "eye_binormal", "vec3", "gl_NormalMatrix*binormal", "!r" },
- { VERTEX, "eye_binormal", "vec3", "transform_normal(binormal)", "r" },
- { VERTEX, "color", "vec4", "gl_Color", 0 },
- { VERTEX, "texture_coord", "vec2", "gl_MultiTexCoord0.xy", 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, "diffuse_map", "sampler2D", 0, 0 },
{ UNIFORM, "shadow", "sampler2DShadow", 0, 0 },
- { UNIFORM, "shadow_darkness", "float", 0, 0 },
- { UNIFORM, "normalmap", "sampler2D", 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 }
+ { 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)
{
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("gl_FragColor"));
+ variables.push_front(ShaderVariable(features.legacy ? "gl_FragColor" : "frag_color"));
- for(const StandardVariable *i=standard_variables; i->name; ++i)
+ list<VariableDefinition>::const_iterator next_custom = custom_variables.begin();
+ for(const VariableDefinition *i=standard_variables; i->name; )
{
- // Skip over anything that isn't used with the supplied flags
- if(i->flags && !evaluate_flags(i->flags))
+ 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;
if(j->variable)
continue;
- if(!name_match(i->name, j->resolved_name.c_str()))
+ if(!name_match(def_uq_name, j->resolved_name.c_str()))
continue;
if(last_resolved)
continue;
}
- j->resolve(*i);
+ j->resolve(*def);
resolved_vars.push_front(&*j);
if(!j->fuzzy_space)
last_resolved = &*j;
- if(!i->expression)
+ if(!def->expression)
continue;
- vector<string> identifiers = extract_identifiers(i->expression);
+ 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
}
}
- if(optimize)
- {
- for(list<ShaderVariable *>::const_iterator i=resolved_vars.begin(); i!=resolved_vars.end(); ++i)
- (*i)->check_inline();
- }
+ // 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.normalmap)
+ 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 source;
- for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
- if((*i)->variable->scope==UNIFORM && (*i)->is_referenced_from(scope))
- source += format("uniform %s %s;\n", (*i)->variable->type, (*i)->resolved_name);
+ bool use_blocks = !features.legacy && ARB_uniform_buffer_object;
- if(scope==VERTEX)
+ if(!features.legacy)
{
- for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
- if((*i)->variable->scope==ATTRIBUTE)
- source += format("attribute %s %s;\n", (*i)->variable->type, (*i)->resolved_name);
+ 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";
+ }
}
- /* Any variables defined in vertex scope but referenced from fragment scope
- should be exported as varyings over the interface. */
- list<ShaderVariable *> varyings;
+ 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)->variable->scope==VERTEX && (*i)->is_referenced_from(FRAGMENT))
+ {
+ 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)
{
- varyings.push_back(*i);
- source += format("varying %s v_%s;\n", (*i)->variable->type, (*i)->resolved_name);
+ 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";
+ }
- if(scope==VERTEX && features.transform)
+ /* Interface variables need to have global declarations. */
+ for(list<ShaderVariable *>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
{
- // Add the prototypes here, until I come up with something better
- source += "vec4 transform_vertex(vec4);\n";
- source += "vec3 transform_normal(vec3);\n";
+ 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((*i)->variable->scope==scope && !(*i)->inlined)
+ {
+ if(!loop_vars.empty() && !loop_vars.back()->in_loop && (*i)->array_size!=loop_size)
{
- source += '\t';
- if((*i)->variable->type)
+ /* 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)
{
- source += (*i)->variable->type;
- source += ' ';
+ InterfaceFlags iface = (*j)->get_interface_flags(scope);
+ if(!(*j)->in_loop && !(iface&OUTPUT))
+ source += format("\t%s;\n", (*j)->create_declaration());
}
- source += format("%s = %s;\n", (*i)->resolved_name, (*i)->get_expression());
+
+ 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();
}
- if(scope==VERTEX)
- {
- for(list<ShaderVariable *>::const_iterator i=varyings.begin(); i!=varyings.end(); ++i)
+ InterfaceFlags iface = (*i)->get_interface_flags(scope);
+
+ if((*i)->array_size>1 || ((*i)->array_size==1 && (iface&GOAL)))
{
- if((*i)->inlined)
- source += format("\tv_%s = %s;\n", (*i)->resolved_name, (*i)->get_expression());
- else
- source += format("\tv_%s = %s;\n", (*i)->resolved_name, (*i)->resolved_name);
+ 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);
}
}
return cond;
}
-ProgramBuilder::MatchLevel ProgramBuilder::name_match(const char *n1, const char *n2, const char **space)
+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;
++n2;
++i;
}
- return (!*n1 && !*n2) ? zzz>=0 ? FUZZY : EXACT : NO_MATCH;
+ 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)
}
else
{
- if(!isalnum(*i) && *i!='_')
+ 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);
- return true;
+ if(*i=='[')
+ subscript = true;
+ else
+ return true;
}
}
}
{
vector<string> result;
const char *ptr = expression;
- unsigned start, length;
+ unsigned start = 0;
+ unsigned length = 0;
while(parse_identifier(ptr, start, length))
{
result.push_back(string(ptr+start, length));
return result;
}
-string ProgramBuilder::replace_identifiers(const char *expression, const map<string, string> &replace_map)
+string ProgramBuilder::replace_identifiers(const char *expression, const map<string, string> &replace_map, bool with_functions)
{
string result;
const char *ptr = expression;
- unsigned start, length;
+ 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;
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),
- normalmap(false),
+ normal_map(false),
shadow(false),
reflection(false),
- transform(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
{
if(lighting)
{
flags += 'l';
+ if(skylight)
+ flags += 'y';
if(specular)
flags += 'p';
- if(normalmap)
+ if(normal_map)
flags += 'n';
}
+ if(fog)
+ flags += 'f';
if(shadow)
flags += 's';
if(reflection)
flags += 'e';
- if(transform)
- flags += 'r';
+ 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)
-{ }
+ 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 StandardVariable &var)
+void ProgramBuilder::ShaderVariable::resolve(const VariableDefinition &var)
{
variable = &var;
const char *space = 0;
- if(name_match(var.name, resolved_name.c_str(), &space)==FUZZY)
+ 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)
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)
(*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);
resolve_space(to.resolved_space);
}
-void ProgramBuilder::ShaderVariable::check_inline()
+void ProgramBuilder::ShaderVariable::check_inline(bool allow_legacy, bool trivial_only)
{
- if(variable->expression)
+ if(variable->expression && variable->scope>=UNIFORM)
{
- unsigned total_refs = referenced_by.size();
+ 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;
- if(total_refs==1 || (total_refs>0 && in_scope_refs==0))
+ 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;
return false;
}
-string ProgramBuilder::ShaderVariable::get_expression() const
+ProgramBuilder::InterfaceFlags ProgramBuilder::ShaderVariable::get_interface_flags(VariableScope scope) const
{
- map<string, string> replace_map;
- for(list<ShaderVariable *>::const_iterator i=referenced_vars.begin(); i!=referenced_vars.end(); ++i)
- if((*i)->variable)
+ /* 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)
{
- string replacement = (*i)->resolved_name;
- if(variable->scope==FRAGMENT && (*i)->variable->scope==VERTEX)
- replacement = "v_"+replacement;
- else if((*i)->inlined)
- {
- replacement = (*i)->get_expression();
- if((*i)->inline_parens)
- replacement = "("+replacement+")";
- }
- if(replacement!=(*i)->name)
- replace_map[(*i)->name] = replacement;
+ 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;
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("normalmap", &StandardFeatures::normalmap);
+ 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);
- add("transform", &StandardFeatures::transform);
+
+ // Deprecated
+ add("normalmap", &StandardFeatures::normal_map);
}
} // namespace GL
projects / libs / gl.git / blobdiff