Add renderer/surface view files

CMakeLists.txt

@@ -393,7 +393,7 @@ else()
 endif()
 
 if(ANDROID)
-    target_link_libraries(Alber PRIVATE log)
+    target_link_libraries(Alber PRIVATE EGL log)
 endif()
 
 if(ENABLE_LTO OR ENABLE_USER_BUILD)

src/jni_driver.cpp

@@ -1,11 +1,36 @@
 #include <jni.h>
+#include <stdexcept>
 #include <android/log.h>
+#include <EGL/egl.h>
+#include "renderer_gl/renderer_gl.hpp"
 #include "emulator.hpp"
 
-std::unique_ptr<Emulator> emulator;
+std::unique_ptr<Emulator> emulator = nullptr;
+RendererGL* renderer = nullptr;
 
 extern "C" JNIEXPORT void JNICALL Java_com_panda3ds_pandroid_AlberDriver_Initialize(JNIEnv* env, jobject obj) {
-    __android_log_print(ANDROID_LOG_INFO, "Panda3DS", "Initializing Alber Driver");
     emulator = std::make_unique<Emulator>();
-    __android_log_print(ANDROID_LOG_INFO, "Panda3DS", "Done");
+    if (emulator->getRendererType() != RendererType::OpenGL) {
+        throw std::runtime_error("Renderer is not OpenGL");
+    }
+    renderer = static_cast<RendererGL*>(emulator->getRenderer());
+    __android_log_print(ANDROID_LOG_INFO, "AlberDriver", "OpenGL ES Before %d.%d", GLVersion.major, GLVersion.minor);
+    if (!gladLoadGLES2Loader(reinterpret_cast<GLADloadproc>(eglGetProcAddress))) {
+		throw std::runtime_error("OpenGL ES init failed");
+	}
+    __android_log_print(ANDROID_LOG_INFO, "AlberDriver", "OpenGL ES %d.%d", GLVersion.major, GLVersion.minor);
+	emulator->initGraphicsContext(nullptr);
+    // girlboss it for now :3
+    emulator->loadROM("/data/data/com.panda3ds.pandroid/files/rom.3ds");
+}
+
+extern "C" JNIEXPORT void JNICALL Java_com_panda3ds_pandroid_AlberDriver_RunFrame(JNIEnv* env, jobject obj, jint fbo) {
+    renderer->setFBO(fbo);
+    renderer->resetStateManager();
+    emulator->runFrame();
+}
+
+extern "C" JNIEXPORT void JNICALL Java_com_panda3ds_pandroid_AlberDriver_Finalize(JNIEnv* env, jobject obj) {
+    emulator = nullptr;
+    renderer = nullptr;
 }

src/pandroid/app/src/main/java/com/panda3ds/pandroid/AlberDriver.java

@@ -2,7 +2,13 @@ package com.panda3ds.pandroid;
 
 public class AlberDriver {
 
+    AlberDriver() {
+        super();
+    }
+
     public static native void Initialize();
+    public static native void RunFrame(int fbo);
+    public static native void Finalize();
 
     static {
         System.loadLibrary("Alber");

src/pandroid/app/src/main/java/com/panda3ds/pandroid/MainActivity.java

@@ -2,15 +2,20 @@ package com.panda3ds.pandroid;
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.os.Build;
 import android.os.Bundle;
+import android.view.WindowInsets;
+import android.view.View;
 
 public class MainActivity extends AppCompatActivity {
 
+    PandaGlSurfaceView glView;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
 
-        AlberDriver.Initialize();
+        glView = new PandaGlSurfaceView(this);
+        setContentView(glView);
     }
 }

src/pandroid/app/src/main/java/com/panda3ds/pandroid/PandaGlRenderer.java

@@ -0,0 +1,79 @@
+package com.panda3ds.pandroid;
+
+import javax.microedition.khronos.egl.EGLConfig;
+import javax.microedition.khronos.opengles.GL10;
+
+import static android.opengl.GLES32.*;
+
+import android.content.res.Resources;
+import android.opengl.GLSurfaceView;
+import android.util.DisplayMetrics;
+import android.util.Log;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.FloatBuffer;
+
+public class PandaGlRenderer implements GLSurfaceView.Renderer {
+    int screenWidth, screenHeight;
+    int screenTexture;
+    public int screenFbo;
+
+    PandaGlRenderer() {
+        super();
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        if (screenTexture != 0) {
+            glDeleteTextures(1, new int[]{screenTexture}, 0);
+        }
+        if (screenFbo != 0) {
+            glDeleteFramebuffers(1, new int[]{screenFbo}, 0);
+        }
+        super.finalize();
+    }
+    
+    public void onSurfaceCreated(GL10 unused, EGLConfig config) {
+        Log.i("pandroid", glGetString(GL_EXTENSIONS));
+        Log.w("pandroid", glGetString(GL_VERSION));
+        screenWidth = Resources.getSystem().getDisplayMetrics().widthPixels;
+        screenHeight = Resources.getSystem().getDisplayMetrics().heightPixels;
+
+        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        int[] generateBuffer = new int[1];
+        glGenTextures(1, generateBuffer, 0);
+        screenTexture = generateBuffer[0];
+        glBindTexture(GL_TEXTURE_2D, screenTexture);
+        glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, screenWidth, screenHeight);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glBindTexture(GL_TEXTURE_2D, 0);
+
+        glGenFramebuffers(1, generateBuffer, 0);
+        screenFbo = generateBuffer[0];
+        glBindFramebuffer(GL_FRAMEBUFFER, screenFbo);
+        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, screenTexture, 0);
+        glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+        AlberDriver.Initialize();
+    }
+
+    public void onDrawFrame(GL10 unused) {
+        AlberDriver.RunFrame(screenFbo);
+        // is this needed? prob not
+        glBindTexture(GL_TEXTURE_2D, 0);
+        glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+        glBindFramebuffer(GL_READ_FRAMEBUFFER, screenFbo);
+        glBlitFramebuffer(0, 0, 400, 480, 0, 0, screenWidth, screenHeight, GL_COLOR_BUFFER_BIT, GL_LINEAR);
+    }
+
+    public void onSurfaceChanged(GL10 unused, int width, int height) {
+        glViewport(0, 0, width, height);
+        screenWidth = width;
+        screenHeight = height;
+        glDisable(GL_SCISSOR_TEST);
+    }
+}

src/pandroid/app/src/main/java/com/panda3ds/pandroid/PandaGlSurfaceView.java

@@ -0,0 +1,19 @@
+package com.panda3ds.pandroid;
+
+import android.app.Activity;
+import android.content.Context;
+import android.opengl.GLSurfaceView;
+import android.util.DisplayMetrics;
+
+import com.panda3ds.pandroid.PandaGlRenderer;
+
+public class PandaGlSurfaceView extends GLSurfaceView {
+    final PandaGlRenderer renderer;
+
+    public PandaGlSurfaceView(Context context) {
+        super(context);
+        setEGLContextClientVersion(3);
+        renderer = new PandaGlRenderer();
+        setRenderer(renderer);
+    }
+}