1 files changed, 86 insertions, 0 deletions
diff --git a/samples/browseable/MediaEffects/src/com.example.android.mediaeffects/GLToolbox.java b/samples/browseable/MediaEffects/src/com.example.android.mediaeffects/GLToolbox.java
new file mode 100644
index 000000000..02a8c590d
--- /dev/null
+++ b/samples/browseable/MediaEffects/src/com.example.android.mediaeffects/GLToolbox.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.mediaeffects;
+
+import android.opengl.GLES20;
+
+public class GLToolbox {
+
+    public static int loadShader(int shaderType, String source) {
+        int shader = GLES20.glCreateShader(shaderType);
+        if (shader != 0) {
+            GLES20.glShaderSource(shader, source);
+            GLES20.glCompileShader(shader);
+            int[] compiled = new int[1];
+            GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
+            if (compiled[0] == 0) {
+                String info = GLES20.glGetShaderInfoLog(shader);
+                GLES20.glDeleteShader(shader);
+                throw new RuntimeException("Could not compile shader " + shaderType + ":" + info);
+            }
+        }
+        return shader;
+    }
+
+    public static int createProgram(String vertexSource, String fragmentSource) {
+        int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource);
+        if (vertexShader == 0) {
+            return 0;
+        }
+        int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource);
+        if (pixelShader == 0) {
+            return 0;
+        }
+
+        int program = GLES20.glCreateProgram();
+        if (program != 0) {
+            GLES20.glAttachShader(program, vertexShader);
+            checkGlError("glAttachShader");
+            GLES20.glAttachShader(program, pixelShader);
+            checkGlError("glAttachShader");
+            GLES20.glLinkProgram(program);
+            int[] linkStatus = new int[1];
+            GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus,
+                    0);
+            if (linkStatus[0] != GLES20.GL_TRUE) {
+                String info = GLES20.glGetProgramInfoLog(program);
+                GLES20.glDeleteProgram(program);
+                throw new RuntimeException("Could not link program: " + info);
+            }
+        }
+        return program;
+    }
+
+    public static void checkGlError(String op) {
+        int error;
+        while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
+            throw new RuntimeException(op + ": glError " + error);
+        }
+    }
+
+    public static void initTexParams() {
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,
+                GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D,
+                GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S,
+                GLES20.GL_CLAMP_TO_EDGE);
+        GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T,
+                GLES20.GL_CLAMP_TO_EDGE);
+    }
+
+}