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First commit
Former-commit-id: 9340873f9cfb15264004c32d6e4b8f8bd6828d94 Former-commit-id: 1916747c109876aa064412e01204c3aeda9bbbc0
This commit is contained in:
Song Minjae
234
src/shader/ShaderVariable.java
Executable file
234
src/shader/ShaderVariable.java
Executable file
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package shader;
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import java.nio.FloatBuffer;
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import java.nio.IntBuffer;
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import java.util.HashMap;
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import java.util.Map;
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import org.lwjgl.BufferUtils;
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import org.lwjgl.opengl.GL20;
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/**
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* Class used to keep track of variables associated with this
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* shader.</br>
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*
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* @author Chronocide (Jeremy Klix)
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*
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*/
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class ShaderVariable{
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public enum Qualifier{
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ATTRIBUTE("attribute"), UNIFORM("uniform"), VARYING("varying");
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private static final Map<String, ShaderVariable.Qualifier> stringToEnum =
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new HashMap<String, ShaderVariable.Qualifier>();
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static{
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for(ShaderVariable.Qualifier qual : values()){
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stringToEnum.put(qual.toString(),qual);
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}
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}
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private String name;
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Qualifier(String name){
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this.name = name;
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}
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public String toString(){
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return name;
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}
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public static ShaderVariable.Qualifier fromString(String token){
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return stringToEnum.get(token);
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}
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}
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public enum Type{
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BOOLEAN("boolean"), DOUBLE("double"), FLOAT("float"),
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INTEGER("integer");
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private String name;
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Type(String name){
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this.name = name;
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}
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public String toString(){
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return name;
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}
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}
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private static final String TYPE_WARN =
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"Warning!\nProblem setting %s variable. " +
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"Expected type %s but got type %s instead.\n";
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private static final String QUAL_WARN =
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"Warning!\nProblem setting %s variable. " +
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"Expected qualifier %s but got %s instead.\n";
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private ShaderVariable.Qualifier qualifier = null;
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private ShaderVariable.Type type = null;
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private int vecSize; //size of vector
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private int size; //size of array non arrays are size 1
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private int programID;
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private int location = -1;
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/**Set true if GLSL has removed this unused variable*/
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private boolean isCulled = false;
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String name = "";
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ShaderVariable(int programID, String name,
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ShaderVariable.Qualifier qual,
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ShaderVariable.Type type,
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int vecSize,
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int size){
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this.programID = programID;
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this.name = name;
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this.qualifier = qual;
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this.type = type;
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if(vecSize<1){
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throw new IllegalArgumentException("size of elements must be greater than 0");
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}
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this.vecSize = vecSize;
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if(size<1){
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throw new IllegalArgumentException("number of elements must be greater than 0");
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}
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this.size = size;
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}
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public String toString(){
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return name;
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}
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public boolean equals(Object obj){
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if(obj instanceof ShaderVariable){
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return this.toString().equals(obj.toString());
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}
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return false;
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}
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public int hashCode(){
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return name.hashCode();
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}
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//TODO TEST
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void setUniformValue(boolean[] vals){
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if(this.type!=Type.BOOLEAN){
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System.err.printf(TYPE_WARN, this.name, this.type, Type.BOOLEAN);
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}
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if(this.qualifier!=Qualifier.UNIFORM){
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System.err.printf(QUAL_WARN, this.name, this.qualifier, Qualifier.UNIFORM);
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}
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if(vals.length!=vecSize){
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throw new AssertionError("Incorrect number of arguments.");
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}
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//No GL methods to set boolean uniforms exist
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if(location==-1){
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CharSequence param = new StringBuffer(name);
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location = GL20.glGetUniformLocation(programID, param);
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locationCheck();
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}
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IntBuffer fb = BufferUtils.createIntBuffer(vals.length);
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for(boolean b : vals){
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fb.put(b? 1 : 0);
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}
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fb.flip();
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switch(vecSize){
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case 1: GL20.glUniform1(location, fb); break;
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case 2: GL20.glUniform2(location, fb); break;
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case 3: GL20.glUniform3(location, fb); break;
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case 4: GL20.glUniform4(location, fb); break;
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}
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}
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void setUniformValue(float[] vals){
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if(this.type!=Type.FLOAT){
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System.err.printf(TYPE_WARN, this.name, this.type, Type.FLOAT);
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}
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if(this.qualifier!=Qualifier.UNIFORM){
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System.err.printf(QUAL_WARN, this.name, this.qualifier, Qualifier.UNIFORM);
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}
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if(vals.length!=vecSize*size){
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throw new AssertionError("Incorrect number of values.\n" +
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"Expected " + vecSize*size + " vlaues but got " +
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vals.length + " values instead.");
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}
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if(location==-1){
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CharSequence param = new StringBuffer(name);
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location = GL20.glGetUniformLocation(programID, param);
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locationCheck();
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}
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FloatBuffer fb = BufferUtils.createFloatBuffer(vals.length);
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fb.put(vals);
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fb.flip();
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switch(vecSize){
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case 1: GL20.glUniform1(location, fb); break;
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case 2: GL20.glUniform2(location, fb); break;
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case 3: GL20.glUniform3(location, fb); break;
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case 4: GL20.glUniform4(location, fb); break;
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}
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}
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void setUniformValue(int[] vals){
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if(this.type!=Type.INTEGER){
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System.err.printf(TYPE_WARN, this.type, Type.INTEGER);
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}
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if(this.qualifier!=Qualifier.UNIFORM){
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System.err.printf(QUAL_WARN, this.name, this.qualifier, Qualifier.UNIFORM);
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}
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if(vals.length!=vecSize*size){
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throw new AssertionError("Incorrect number of values.\n" +
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"Expected " + vecSize*size + " vlaues but got " +
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vals.length + " values instead.");
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}
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if(location==-1){
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CharSequence param = new StringBuffer(name);
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location = GL20.glGetUniformLocation(programID, param);
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locationCheck();
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}
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IntBuffer fb = BufferUtils.createIntBuffer(vals.length);
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fb.put(vals);
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fb.flip();
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switch(vecSize){
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case 1: GL20.glUniform1(location, fb); break;
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case 2: GL20.glUniform2(location, fb); break;
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case 3: GL20.glUniform3(location, fb); break;
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case 4: GL20.glUniform4(location, fb); break;
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}
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}
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private void locationCheck(){
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if(location==-1 && !isCulled){
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System.err.println("Location for variable " + name +
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"could not be found.\nGLSL may remove " +
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"any vairable that does not contribute " +
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"to an output. Check and ensure " +
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"that " + name + "is an active variable.\n");
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isCulled = true;
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}
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}
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}
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