Cleanup

src/com/persesgames/jogl/shader/Program.java

@@ -0,0 +1,107 @@
+package com.persesgames.jogl.shader;
+
+import com.persesgames.jogl.Renderer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.media.opengl.GL2ES2;
+import java.util.HashMap;
+import java.util.Map;
+
+/*-----------------------------------------------------+
+ |                      App                             |
+ |                    pPPAPPp                           |
+ |                   APP  PPa                           |
+ |                  APA  pPP  PapA  PapA                |
+ |                 PPA   APA pP  P pP  P                |
+ |             APPPPPPPA PPp Ap Ap Ap Ap                |
+ |             apPPA    aPP  P     P                    |
+ |              APA     pPP  p     p                    |
+ |             pPP      PPA                             |
+ |             PPp      PPPp                            |
+ |                                                      |
+ | Created by:    App Software                          |
+ | Email:         info@appsoftware.nl                   |
+ | Web:           http://www.appsoftware.nl/            |
+ |                                                      |
+ +-----------------------------------------------------*/
+
+public abstract class Program {
+
+    protected GL2ES2              gl;
+
+    protected int                 program;
+
+    private Map<String, Integer>  uniformLocations = new HashMap<>();
+    private Map<String, Integer>  attribLocations = new HashMap<>();
+
+    public Program(GL2ES2 gl) {
+        this.gl = gl;
+    }
+
+    public int getUniformLocation(String uniform) {
+        Integer result = uniformLocations.get(uniform);
+
+        if (result == null) {
+            result = gl.glGetUniformLocation(program, uniform);
+
+            uniformLocations.put(uniform, result);
+        }
+
+        return result;
+    }
+
+    public int getAttribLocation(String attrib) {
+        Integer result = attribLocations.get(attrib);
+
+        if (result == null) {
+            result = gl.glGetAttribLocation(program, attrib);
+
+            attribLocations.put(attrib, result);
+        }
+
+        return result;
+    }
+
+    public void bindAttributeLocation(int location, String name) {
+        gl.glBindAttribLocation(program, location, name);
+    }
+
+    public void begin() {
+        gl.glUseProgram(program);
+    }
+
+    public void end() {
+        gl.glUseProgram(0);
+    }
+
+    protected void dispose() {
+        gl.glDeleteProgram(program);
+    }
+
+    protected int createAndCompileShader(int type, String shaderString) {
+        int shader = gl.glCreateShader(type);
+
+        String[] vlines = new String[]{shaderString};
+        int[] vlengths = new int[]{vlines[0].length()};
+
+        gl.glShaderSource(shader, vlines.length, vlines, vlengths, 0);
+        gl.glCompileShader(shader);
+
+        int[] compiled = new int[1];
+        gl.glGetShaderiv(shader, GL2ES2.GL_COMPILE_STATUS, compiled, 0);
+
+        if (compiled[0] == 0) {
+            int[] logLength = new int[1];
+            gl.glGetShaderiv(shader, GL2ES2.GL_INFO_LOG_LENGTH, logLength, 0);
+
+            byte[] log = new byte[logLength[0]];
+            gl.glGetShaderInfoLog(shader, logLength[0], (int[]) null, 0, log, 0);
+
+            throw new IllegalStateException("Error compiling the shader: " + new String(log));
+        }
+
+        return shader;
+    }
+
+}