1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
package net.tylermurphy.Minecraft.Render.Util;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.nio.FloatBuffer;
import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL20;
import org.joml.Matrix4f;
import org.joml.Vector2f;
import org.joml.Vector3f;
import org.joml.Vector4f;
import net.tylermurphy.Minecraft.Util.Constants;
public abstract class ShaderProgram {
private int programID;
private int vertexShaderID;
private int fragmentShaderID;
private static FloatBuffer matrixBuffer = BufferUtils.createFloatBuffer(16);
public ShaderProgram(String vertexFile,String fragmentFile){
vertexShaderID = loadShader(vertexFile,GL20.GL_VERTEX_SHADER);
fragmentShaderID = loadShader(fragmentFile,GL20.GL_FRAGMENT_SHADER);
programID = GL20.glCreateProgram();
GL20.glAttachShader(programID, vertexShaderID);
GL20.glAttachShader(programID, fragmentShaderID);
bindAttributes();
GL20.glLinkProgram(programID);
GL20.glValidateProgram(programID);
getAllUniformLocations();
}
protected abstract void getAllUniformLocations();
protected int getUniformLocation(String uniformName){
return GL20.glGetUniformLocation(programID,uniformName);
}
public void start(){
GL20.glUseProgram(programID);
}
public void stop(){
GL20.glUseProgram(0);
}
public void cleanUp(){
stop();
GL20.glDetachShader(programID, vertexShaderID);
GL20.glDetachShader(programID, fragmentShaderID);
GL20.glDeleteShader(vertexShaderID);
GL20.glDeleteShader(fragmentShaderID);
GL20.glDeleteProgram(programID);
}
protected abstract void bindAttributes();
protected void bindAttribute(int attribute, String variableName){
GL20.glBindAttribLocation(programID, attribute, variableName);
}
protected void loadFloat(int location, float value){
GL20.glUniform1f(location, value);
}
protected void loadInt(int location, int value){
GL20.glUniform1i(location, value);
}
protected void loadVector(int location, Vector3f vector){
GL20.glUniform3f(location,vector.x,vector.y,vector.z);
}
protected void loadVector(int location, Vector4f vector){
GL20.glUniform4f(location,vector.x,vector.y,vector.z, vector.w);
}
protected void load2DVector(int location, Vector2f vector){
GL20.glUniform2f(location,vector.x,vector.y);
}
protected void loadBoolean(int location, boolean value){
float toLoad = 0;
if(value){
toLoad = 1;
}
GL20.glUniform1f(location, toLoad);
}
protected void loadMatrix(int location, Matrix4f matrix){
matrix.get(matrixBuffer);
GL20.glUniformMatrix4fv(location, false, matrixBuffer);
}
private static int loadShader(String file, int type){
StringBuilder shaderSource = new StringBuilder();
try{
FileReader fr = new FileReader(new File(Constants.SHADER_LOCATION + file));
BufferedReader reader = new BufferedReader(fr);
String line;
while((line = reader.readLine())!=null){
shaderSource.append(line).append("//\n");
}
reader.close();
}catch(IOException e){
e.printStackTrace();
System.exit(-1);
}
int shaderID = GL20.glCreateShader(type);
GL20.glShaderSource(shaderID, shaderSource);
GL20.glCompileShader(shaderID);
if(GL20.glGetShaderi(shaderID, GL20.GL_COMPILE_STATUS )== GL11.GL_FALSE){
System.out.println(GL20.glGetShaderInfoLog(shaderID, 500));
System.err.println("Could not compile shader!");
System.exit(-1);
}
return shaderID;
}
}
|
