/**
* reads a list of ShaderNode{} blocks
*
* @param statements the list of statements to parse
* @throws IOException
*/
protected void readShaderNode(List<Statement> statements) throws IOException {
for (Statement statement : statements) {
String line = statement.getLine();
String[] split = statement.getLine().split("[ \\{]");
if (line.startsWith("Definition")) {
ShaderNodeDefinition def = findDefinition(statement);
shaderNode.setDefinition(def);
if (def.isNoOutput()) {
techniqueDef.getShaderGenerationInfo().getUnusedNodes().remove(shaderNode.getName());
}
} else if (line.startsWith("Condition")) {
String condition = line.substring(line.lastIndexOf(":") + 1).trim();
extractCondition(condition, statement);
shaderNode.setCondition(conditionParser.getFormattedExpression());
} else if (line.startsWith("InputMapping")) {
for (Statement statement1 : statement.getContents()) {
VariableMapping mapping = readInputMapping(statement1);
techniqueDef
.getShaderGenerationInfo()
.getUnusedNodes()
.remove(mapping.getRightVariable().getNameSpace());
shaderNode.getInputMapping().add(mapping);
}
} else if (line.startsWith("OutputMapping")) {
for (Statement statement1 : statement.getContents()) {
VariableMapping mapping = readOutputMapping(statement1);
techniqueDef.getShaderGenerationInfo().getUnusedNodes().remove(shaderNode.getName());
shaderNode.getOutputMapping().add(mapping);
}
} else {
throw new MatParseException("ShaderNodeDefinition", split[0], statement);
}
}
}
/**
* Reads alist of ShaderNodes
*
* @param statements the list of statements to read
* @throws IOException
*/
public void readNodes(List<Statement> statements) throws IOException {
if (techniqueDef.getShaderNodes() == null) {
techniqueDef.setShaderNodes(new ArrayList<ShaderNode>());
techniqueDef.setShaderGenerationInfo(new ShaderGenerationInfo());
}
for (Statement statement : statements) {
String[] split = statement.getLine().split("[ \\{]");
if (statement.getLine().startsWith("ShaderNode ")) {
String name = statement.getLine().substring("ShaderNode".length()).trim();
if (nodes == null) {
nodes = new HashMap<String, ShaderNode>();
}
if (!nodes.containsKey(name)) {
shaderNode = new ShaderNode();
shaderNode.setName(name);
techniqueDef.getShaderGenerationInfo().getUnusedNodes().add(name);
readShaderNode(statement.getContents());
nodes.put(name, shaderNode);
techniqueDef.getShaderNodes().add(shaderNode);
} else {
throw new MatParseException("ShaderNode " + name + " is already defined", statement);
}
} else {
throw new MatParseException("ShaderNode", split[0], statement);
}
}
}
/**
* stores a global output
*
* @param var the variable to store
* @param statement1 the statement being read
* @throws IOException
*/
public void storeGlobal(ShaderNodeVariable var, Statement statement1) throws IOException {
var.setShaderOutput(true);
if (shaderNode.getDefinition().getType() == Shader.ShaderType.Vertex) {
ShaderNodeVariable global = techniqueDef.getShaderGenerationInfo().getVertexGlobal();
if (global != null) {
// global.setCondition(mergeConditions(global.getCondition(),
// var.getCondition(), "||"));
// var.setCondition(global.getCondition());
if (!global.getName().equals(var.getName())) {
throw new MatParseException(
"A global output is already defined for the vertex shader: "
+ global.getName()
+ ". vertex shader can only have one global output",
statement1);
}
} else {
techniqueDef.getShaderGenerationInfo().setVertexGlobal(var);
}
} else if (shaderNode.getDefinition().getType() == Shader.ShaderType.Fragment) {
storeVariable(var, techniqueDef.getShaderGenerationInfo().getFragmentGlobals());
}
}
/**
* store a varying
*
* @param node the shaderNode
* @param variable the variable to store
*/
public void storeVaryings(ShaderNode node, ShaderNodeVariable variable) {
variable.setShaderOutput(true);
if (node.getDefinition().getType() == Shader.ShaderType.Vertex
&& shaderNode.getDefinition().getType() == Shader.ShaderType.Fragment) {
DeclaredVariable dv = varyings.get(variable.getName());
if (dv == null) {
techniqueDef.getShaderGenerationInfo().getVaryings().add(variable);
dv = new DeclaredVariable(variable);
varyings.put(variable.getName(), dv);
}
dv.addNode(shaderNode);
// if a variable is declared with the same name as an input and an output and is a varying,
// set it as a shader output so it's declared as a varying only once.
for (VariableMapping variableMapping : node.getInputMapping()) {
if (variableMapping.getLeftVariable().getName().equals(variable.getName())) {
variableMapping.getLeftVariable().setShaderOutput(true);
}
}
}
}
/**
* store a fragment uniform
*
* @param var the variable ot store
*/
public void storeFragmentUniform(ShaderNodeVariable var) {
storeVariable(var, techniqueDef.getShaderGenerationInfo().getFragmentUniforms());
}
/**
* store an attribute
*
* @param var the variable ot store
*/
public void storeAttribute(ShaderNodeVariable var) {
storeVariable(var, techniqueDef.getShaderGenerationInfo().getAttributes());
}