X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogrambuilder.cpp;h=247c249b380901623e1dfc02ac573966e445a89f;hp=829691b61c8fbd8929262fe8a5da6e6404e167ef;hb=4a1e2b6a68095e6bb7c212be57abb5a1509739b9;hpb=437609f708f2918067ec64f6d02261d113b1cac0

diff --git a/source/programbuilder.cpp b/source/programbuilder.cpp
index 829691b6..247c249b 100644
--- a/source/programbuilder.cpp
+++ b/source/programbuilder.cpp
@@ -162,11 +162,12 @@ const ProgramBuilder::VariableDefinition ProgramBuilder::standard_variables[] =
 	{ NO_SCOPE, 0, 0, 0, 0 }
 };
 
-const char ProgramBuilder::interfaces[] = { 0, 0, 0, 0, 0, 'v', 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())
@@ -259,6 +260,9 @@ ProgramBuilder::ProgramBuilder(const StandardFeatures &f):
 		}
 	}
 
+	if(!features.geometry)
+		enabled_scopes &= ~(1<<GEOMETRY);
+
 	if(!features.legacy)
 	{
 		aliases["texture1D"] = "texture";
@@ -469,7 +473,7 @@ string ProgramBuilder::create_source(const list<ShaderVariable *> &variables, Va
 		if(iface&INPUT)
 		{
 			const char *qualifier = (features.legacy ? scope==VERTEX ? "attribute" : "varying" : "in");
-			source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope-1]));
+			source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[previous_scope(scope, enabled_scopes)]));
 		}
 
 		if(iface&OUTPUT)
@@ -743,9 +747,21 @@ string ProgramBuilder::replace_identifiers(const char *expression, const map<str
 	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(loop);
+	string expr = var.create_expression(enabled_scopes, loop);
 	return replace_identifiers(expr.c_str(), aliases, true);
 }
 
@@ -762,12 +778,13 @@ ProgramBuilder::StandardFeatures::StandardFeatures():
 	shadow(false),
 	reflection(false),
 	clipping(false),
-	max_clip_planes(1)
+	max_clip_planes(1),
+	geometry(false)
 {
 	if(get_gl_api()==OPENGL_ES2)
-		legacy = !(get_glsl_version()>=Version(3, 0));
+		legacy = get_glsl_version()<Version(3, 0);
 	else
-		legacy = !(get_glsl_version()>=Version(1, 30));
+		legacy = get_glsl_version()<Version(1, 30);
 }
 
 string ProgramBuilder::StandardFeatures::create_flags() const
@@ -876,7 +893,7 @@ void ProgramBuilder::ShaderVariable::resolve_space(const string &space)
 			(*i)->resolve_space(space);
 }
 
-void ProgramBuilder::ShaderVariable::resolve_array(const StandardFeatures &features, unsigned size_hint)
+void ProgramBuilder::ShaderVariable::resolve_array(const StandardFeatures &feat, unsigned size_hint)
 {
 	if(array_size)
 		return;
@@ -893,9 +910,9 @@ void ProgramBuilder::ShaderVariable::resolve_array(const StandardFeatures &featu
 	if(variable && variable->scope==UNIFORM)
 	{
 		if(array_subscript=="MAX_LIGHTS")
-			array_size = features.max_lights;
+			array_size = feat.max_lights;
 		else if(array_subscript=="MAX_CLIP_PLANES")
-			array_size = features.max_clip_planes;
+			array_size = feat.max_clip_planes;
 		else if(isnumrc(array_subscript))
 			array_size = lexical_cast<unsigned>(array_subscript);
 		else
@@ -919,7 +936,7 @@ void ProgramBuilder::ShaderVariable::resolve_array(const StandardFeatures &featu
 	{
 		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(features, array_size);
+				(*i)->resolve_array(feat, array_size);
 	}
 }
 
@@ -1075,18 +1092,19 @@ string ProgramBuilder::ShaderVariable::create_declaration(char iface, bool loop)
 		return format("%s %s%s", variable->type, resolved_name, array);
 }
 
-string ProgramBuilder::ShaderVariable::create_replacement(VariableScope from_scope, const char *loop) const
+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);
-		if((iface&INPUT) && interfaces[from_scope-1])
-			replacement = format("%c_%s", interfaces[from_scope-1], replacement);
+		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(loop);
+			replacement = create_expression(scopes, loop);
 			if(inline_parens)
 				replacement = "("+replacement+")";
 			return replacement;
@@ -1105,12 +1123,12 @@ string ProgramBuilder::ShaderVariable::create_replacement(VariableScope from_sco
 	return replacement;
 }
 
-string ProgramBuilder::ShaderVariable::create_expression(const char *loop) const
+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, loop);
+		string replacement = (*i)->create_replacement(variable->scope, scopes, loop);
 		if(replacement!=(*i)->name)
 			replace_map[(*i)->name] = replacement;
 	}
@@ -1128,6 +1146,7 @@ ProgramBuilder::StandardFeatures::Loader::Loader(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);