#!/bin/bash
set -u
set -e

if [ -z "$ANDROID_BUILD_TOP" ] ; then
    echo "ANDROID_BUILD_TOP is not set, did you run lunch?"
    exit 1
fi

# Avoid spewing files in any location other than the intended one.
if [ ! -x "$PWD/gen" ] ; then
    echo "Run this script from its parent directory".
    exit 1
fi

rm -rf out generated

mkdir out

# Create stub Java files for Android APIs that are used by the code we generate.
# This allows us to test the generated code without building the rest of Android.

mkdir -p out/javax/microedition/khronos/opengles
mkdir -p out/com/google/android/gles_jni
mkdir -p out/android/app
mkdir -p out/android/graphics
mkdir -p out/android/view
mkdir -p out/android/opengl
mkdir -p out/android/content
mkdir -p out/android/content/pm
mkdir -p out/android/os
mkdir -p out/android/util

echo "package android.graphics;" > out/android/graphics/Canvas.java
echo "public interface Canvas {}" >> out/android/graphics/Canvas.java

echo "package android.app; import android.content.pm.IPackageManager; public class AppGlobals { public static IPackageManager getPackageManager() { return null;} }" > out/android/app/AppGlobals.java
# echo "package android.content; import android.content.pm.PackageManager; public interface Context { public PackageManager getPackageManager(); }" > out/android/content/Context.java
echo "package android.content.pm; public class ApplicationInfo {public int targetSdkVersion;}" > out/android/content/pm/ApplicationInfo.java
echo "package android.content.pm; public interface IPackageManager {ApplicationInfo getApplicationInfo(java.lang.String packageName, int flags, java.lang.String userId) throws android.os.RemoteException;}" > out/android/content/pm/IPackageManager.java
echo "package android.os; public class Build {public static class VERSION_CODES { public static final int CUPCAKE = 3;};	}" > out/android/os/Build.java
echo "package android.os; public class UserHandle {public static String myUserId() { return \"\"; } }" > out/android/os/UserHandle.java
echo "package android.os; public class RemoteException extends Exception {}" > out/android/os/RemoteException.java
echo "package android.util; public class Log {public static void w(String a, String b) {} public static void e(String a, String b) {}}" > out/android/util/Log.java

echo "package android.opengl; public abstract class EGLObjectHandle { public int getHandle() { return 0; } }" > out/android/opengl/EGLObjectHandle.java


echo "package android.graphics;" > out/android/graphics/SurfaceTexture.java
echo "public interface SurfaceTexture {}" >> out/android/graphics/SurfaceTexture.java
echo "package android.view;" > out/android/view/SurfaceView.java
echo "public interface SurfaceView { SurfaceHolder getHolder(); }" >> out/android/view/SurfaceView.java
echo "package android.view;" > out/android/view/Surface.java
echo "public interface Surface {}" >> out/android/view/Surface.java
echo "package android.view;" > out/android/view/SurfaceHolder.java
echo "public interface SurfaceHolder { Surface getSurface(); }" >> out/android/view/SurfaceHolder.java

cp static/egl/*.java out/android/opengl/

GLFILE=out/javax/microedition/khronos/opengles/GL.java
cp stubs/jsr239/GLHeader.java-if $GLFILE

GLGEN_FILES="CFunc.java CType.java CodeEmitter.java EGLCodeEmitter.java GenerateEGL.java GenerateGL.java GenerateGLES.java GLESCodeEmitter.java JFunc.java JniCodeEmitter.java JType.java Jsr239CodeEmitter.java ParameterChecker.java"

pushd src > /dev/null
javac ${GLGEN_FILES}
JAVAC_RESULT=$?
if [ $JAVAC_RESULT -ne 0 ]; then
    echo "Could not compile glgen."
    exit $JAVAC_RESULT
fi
popd > /dev/null

echo "Generating JSR239-like APIs"
java -classpath src GenerateGL -c specs/jsr239/glspec-1.0 \
                                  specs/jsr239/glspec-1.0ext \
                                  specs/jsr239/glspec-1.1 \
                                  specs/jsr239/glspec-1.1ext \
                                  specs/jsr239/glspec-1.1extpack \
                                  specs/jsr239/glspec-checks
JAVA_RESULT=$?
if [ $JAVA_RESULT -ne 0 ]; then
    echo "Could not run GenerateGL."
    exit $JAVA_RESULT
fi

echo "Generating static OpenGLES bindings"
java -classpath src GenerateGLES
JAVA_RESULT=$?
if [ $JAVA_RESULT -ne 0 ]; then
    echo "Could not run GenerateGLES."
    exit $JAVA_RESULT
fi

echo "Generating static EGL bindings"
java -classpath src GenerateEGL
JAVA_RESULT=$?
if [ $JAVA_RESULT -ne 0 ]; then
    echo "Could not run GenerateEGL."
    exit $JAVA_RESULT
fi

rm src/*.class

# Add UnsupportedAppUsage.java to known sources.
mkdir -p out/android/compat/annotation
cp ${ANDROID_BUILD_TOP}/tools/platform-compat/java/android/compat/annotation/UnsupportedAppUsage.java out/android/compat/annotation

pushd out > /dev/null
mkdir classes
javac -d classes    android/opengl/EGL14.java \
                    android/opengl/EGL15.java \
                    android/opengl/EGLExt.java \
                    com/google/android/gles_jni/GLImpl.java \
                    javax/microedition/khronos/opengles/GL10.java \
                    javax/microedition/khronos/opengles/GL10Ext.java \
                    javax/microedition/khronos/opengles/GL11.java \
                    javax/microedition/khronos/opengles/GL11Ext.java \
                    javax/microedition/khronos/opengles/GL11ExtensionPack.java \
                    android/opengl/GLES10.java \
                    android/opengl/GLES10Ext.java \
                    android/opengl/GLES11.java \
                    android/opengl/GLES11Ext.java \
                    android/opengl/GLES20.java \
                    android/opengl/GLES30.java \
                    android/opengl/GLES31.java \
                    android/opengl/GLES31Ext.java \
                    android/opengl/GLES32.java \
                    android/compat/annotation/UnsupportedAppUsage.java
popd > /dev/null
JAVA_RESULT=$?
if [ $JAVA_RESULT -ne 0 ]; then
    echo "Could not compile generated classes."
    exit $JAVA_RESULT
fi

rm -rf generated
mkdir -p generated/C
cp out/com_google_android_gles_jni_GLImpl.cpp generated/C
cp -r out/com generated
cp -r out/javax generated

cp out/android_opengl_*.cpp generated/C
mkdir -p generated/android/opengl
cp -r out/android/opengl generated/android

rm -rf out
KEEP_GENERATED=0
SAID_PLEASE=0

# compareGenerated destDir generatedDir file
compareGenerated() {
    if cmp -s $1/$3 $2/$3 ; then
        echo "#    " $3 unchanged
    else
        echo "#    " $3 changed
        if [ $SAID_PLEASE == "0" ] ; then
            echo Please evaluate the following commands:
            echo
            SAID_PLEASE=1
        fi
        echo "    cp $2/$3 $1/$3"
        echo "    (cd $1; git add $3)"
        KEEP_GENERATED=1
    fi
}

compareGenerated ${ANDROID_BUILD_TOP}/frameworks/base/core/jni generated/C com_google_android_gles_jni_GLImpl.cpp
compareGenerated ${ANDROID_BUILD_TOP}/frameworks/base/opengl/java/com/google/android/gles_jni generated/com/google/android/gles_jni GLImpl.java

for x in GL.java GL10.java GL10Ext.java GL11.java GL11Ext.java GL11ExtensionPack.java
do
    compareGenerated ${ANDROID_BUILD_TOP}/frameworks/base/opengl/java/javax/microedition/khronos/opengles generated/javax/microedition/khronos/opengles $x
done

for x in EGL14 EGL15 EGLExt GLES10 GLES10Ext GLES11 GLES11Ext GLES20 GLES30 GLES31 GLES31Ext GLES32
do
    compareGenerated ${ANDROID_BUILD_TOP}/frameworks/base/opengl/java/android/opengl generated/android/opengl ${x}.java
    compareGenerated ${ANDROID_BUILD_TOP}/frameworks/base/core/jni generated/C android_opengl_${x}.cpp
done

for x in EGLConfig EGLContext EGLDisplay EGLObjectHandle EGLSurface EGLImage EGLSync
do
    compareGenerated ${ANDROID_BUILD_TOP}/frameworks/base/opengl/java/android/opengl generated/android/opengl ${x}.java
done

if [ $KEEP_GENERATED == "0" ] ; then
    rm -rf generated
fi