Enable GLES3 on Android

Add necessary build flags and switch from using a
GLES2 context to a GLES3 one.

This also enables building for OpenXR

Co-authored-by: m4gr3d <fhuyakou@gmail.com>
Co-authored-by: dsnopek <dsnopek@gmail.com>

13 files changed, 40 insertions, 44 deletions

diff --git a/drivers/gles3/shaders/stdlib_inc.glsl b/drivers/gles3/shaders/stdlib_inc.glsl
index d5051760d7..d819940b1d 100644
--- a/drivers/gles3/shaders/stdlib_inc.glsl
+++ b/drivers/gles3/shaders/stdlib_inc.glsl
@@ -38,7 +38,6 @@ vec2 unpackSnorm2x16(uint p) {
 	vec2 v = vec2(float(p & uint(0xffff)), float(p >> uint(16)));
 	return clamp((v - 32767.0) * vec2(0.00003051851), vec2(-1.0), vec2(1.0));
 }
-#endif
 
 uint packUnorm4x8(vec4 v) {
 	uvec4 uv = uvec4(round(clamp(v, vec4(0.0), vec4(1.0)) * 255.0));
@@ -58,3 +57,5 @@ vec4 unpackSnorm4x8(uint p) {
 	vec4 v = vec4(float(p & uint(0xff)), float((p >> uint(8)) & uint(0xff)), float((p >> uint(16)) & uint(0xff)), float(p >> uint(24)));
 	return clamp((v - vec4(127.0)) * vec4(0.00787401574), vec4(-1.0), vec4(1.0));
 }
+
+#endif
diff --git a/main/main.cpp b/main/main.cpp
index d857c93b73..2d0843a331 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1540,6 +1540,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	if (rendering_driver.is_empty() && rendering_method.is_empty() && project_manager) {
 		rendering_driver = "opengl3";
 		rendering_method = "gl_compatibility";
+		default_renderer_mobile = "gl_compatibility";
 	}
 #endif
 	if (renderer_hints.is_empty()) {
diff --git a/modules/openxr/extensions/openxr_opengl_extension.cpp b/modules/openxr/extensions/openxr_opengl_extension.cpp
index 569030cc11..234c5f8391 100644
--- a/modules/openxr/extensions/openxr_opengl_extension.cpp
+++ b/modules/openxr/extensions/openxr_opengl_extension.cpp
@@ -138,7 +138,7 @@ void *OpenXROpenGLExtension::set_session_create_and_get_next_pointer(void *p_nex
 
 	graphics_binding_gl.display = eglGetCurrentDisplay();
 	graphics_binding_gl.config = (EGLConfig)0; // https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/master/src/tests/hello_xr/graphicsplugin_opengles.cpp#L122
-	graphics_binding_gl.context = eglGetCurrentContext();
+	graphics_binding_gl.context = (void *)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT);
 #else
 	graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_XLIB_KHR;
 	graphics_binding_gl.next = p_next_pointer;
diff --git a/modules/openxr/openxr_api.cpp b/modules/openxr/openxr_api.cpp
index d6580ebfa6..59d3865acd 100644
--- a/modules/openxr/openxr_api.cpp
+++ b/modules/openxr/openxr_api.cpp
@@ -51,7 +51,7 @@
 #define XR_USE_GRAPHICS_API_VULKAN
 #endif
 #ifdef GLES3_ENABLED
-#ifdef ANDROID
+#ifdef ANDROID_ENABLED
 #define XR_USE_GRAPHICS_API_OPENGL_ES
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
@@ -59,7 +59,7 @@
 #include <GLES3/gl3ext.h>
 #else
 #define XR_USE_GRAPHICS_API_OPENGL
-#endif // ANDROID
+#endif // ANDROID_ENABLED
 #ifdef X11_ENABLED
 #include OPENGL_INCLUDE_H
 #define GL_GLEXT_PROTOTYPES 1
diff --git a/platform/android/detect.py b/platform/android/detect.py
index 57a8d34d0e..d4d6154472 100644
--- a/platform/android/detect.py
+++ b/platform/android/detect.py
@@ -161,7 +161,6 @@ def configure(env: "Environment"):
             "-fpic -ffunction-sections -funwind-tables -fstack-protector-strong -fvisibility=hidden -fno-strict-aliasing".split()
         )
     )
-    env.Append(CPPDEFINES=["GLES_ENABLED"])
 
     if get_min_sdk_version(env["ndk_platform"]) >= 24:
         env.Append(CPPDEFINES=[("_FILE_OFFSET_BITS", 64)])
@@ -184,9 +183,13 @@ def configure(env: "Environment"):
 
     env.Prepend(CPPPATH=["#platform/android"])
     env.Append(CPPDEFINES=["ANDROID_ENABLED", "UNIX_ENABLED"])
-    env.Append(LIBS=["OpenSLES", "EGL", "GLESv2", "android", "log", "z", "dl"])
+    env.Append(LIBS=["OpenSLES", "EGL", "android", "log", "z", "dl"])
 
     if env["vulkan"]:
         env.Append(CPPDEFINES=["VULKAN_ENABLED"])
         if not env["use_volk"]:
             env.Append(LIBS=["vulkan"])
+
+    if env["opengl3"]:
+        env.Append(CPPDEFINES=["GLES3_ENABLED"])
+        env.Append(LIBS=["GLESv3"])
diff --git a/platform/android/display_server_android.cpp b/platform/android/display_server_android.cpp
index 1b261b489e..f76f3844e9 100644
--- a/platform/android/display_server_android.cpp
+++ b/platform/android/display_server_android.cpp
@@ -41,6 +41,10 @@
 #include "platform/android/vulkan/vulkan_context_android.h"
 #include "servers/rendering/renderer_rd/renderer_compositor_rd.h"
 #endif
+#ifdef GLES3_ENABLED
+#include "drivers/gles3/rasterizer_gles3.h"
+#include <EGL/egl.h>
+#endif
 
 DisplayServerAndroid *DisplayServerAndroid::get_singleton() {
 	return static_cast<DisplayServerAndroid *>(DisplayServer::get_singleton());
@@ -323,7 +327,7 @@ int64_t DisplayServerAndroid::window_get_native_handle(HandleType p_handle_type,
 		}
 #ifdef GLES3_ENABLED
 		case OPENGL_CONTEXT: {
-			return eglGetCurrentContext();
+			return reinterpret_cast<int64_t>(eglGetCurrentContext());
 		}
 #endif
 		default: {
@@ -449,6 +453,14 @@ DisplayServer *DisplayServerAndroid::create_func(const String &p_rendering_drive
 	DisplayServer *ds = memnew(DisplayServerAndroid(p_rendering_driver, p_mode, p_vsync_mode, p_flags, p_position, p_resolution, r_error));
 	if (r_error != OK) {
 		OS::get_singleton()->alert("Your video card driver does not support any of the supported Vulkan versions.", "Unable to initialize Video driver");
+		if (p_rendering_driver == "vulkan") {
+			OS::get_singleton()->alert("Your video card driver does not support the selected Vulkan version.\n"
+									   "Please try exporting your game using the gl_compatibility renderer.",
+					"Unable to initialize Video driver");
+		} else {
+			OS::get_singleton()->alert("Your video card driver does not support OpenGL ES 3.0.",
+					"Unable to initialize Video driver");
+		}
 	}
 	return ds;
 }
@@ -493,28 +505,11 @@ void DisplayServerAndroid::notify_surface_changed(int p_width, int p_height) {
 DisplayServerAndroid::DisplayServerAndroid(const String &p_rendering_driver, DisplayServer::WindowMode p_mode, DisplayServer::VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, Error &r_error) {
 	rendering_driver = p_rendering_driver;
 
-	// TODO: rendering_driver is broken, change when different drivers are supported again
-	rendering_driver = "vulkan";
-
 	keep_screen_on = GLOBAL_GET("display/window/energy_saving/keep_screen_on");
 
 #if defined(GLES3_ENABLED)
 	if (rendering_driver == "opengl3") {
-		bool gl_initialization_error = false;
-
-		if (RasterizerGLES3::is_viable() == OK) {
-			RasterizerGLES3::register_config();
-			RasterizerGLES3::make_current();
-		} else {
-			gl_initialization_error = true;
-		}
-
-		if (gl_initialization_error) {
-			OS::get_singleton()->alert("Your device does not support any of the supported OpenGL versions.\n"
-									   "Please try updating your Android version.",
-					"Unable to initialize video driver");
-			return;
-		}
+		RasterizerGLES3::make_current();
 	}
 #endif
 
diff --git a/platform/android/java/app/AndroidManifest.xml b/platform/android/java/app/AndroidManifest.xml
index 2d4c4763a2..1db135826a 100644
--- a/platform/android/java/app/AndroidManifest.xml
+++ b/platform/android/java/app/AndroidManifest.xml
@@ -13,7 +13,7 @@
         android:xlargeScreens="true" />
 
     <uses-feature
-        android:glEsVersion="0x00020000"
+        android:glEsVersion="0x00030000"
         android:required="true" />
 
     <application
diff --git a/platform/android/java/editor/src/main/AndroidManifest.xml b/platform/android/java/editor/src/main/AndroidManifest.xml
index 6aa5f06f31..f3ddaafd0e 100644
--- a/platform/android/java/editor/src/main/AndroidManifest.xml
+++ b/platform/android/java/editor/src/main/AndroidManifest.xml
@@ -11,7 +11,7 @@
         android:xlargeScreens="true" />
 
     <uses-feature
-        android:glEsVersion="0x00020000"
+        android:glEsVersion="0x00030000"
         android:required="true" />
 
     <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
diff --git a/platform/android/java/lib/src/org/godotengine/godot/GodotGLRenderView.java b/platform/android/java/lib/src/org/godotengine/godot/GodotGLRenderView.java
index 252554126d..f8d937521b 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/GodotGLRenderView.java
+++ b/platform/android/java/lib/src/org/godotengine/godot/GodotGLRenderView.java
@@ -68,7 +68,7 @@ import java.io.InputStream;
  *   See ContextFactory class definition below.
  *
  * - The class must use a custom EGLConfigChooser to be able to select
- *   an EGLConfig that supports 2.0. This is done by providing a config
+ *   an EGLConfig that supports 3.0. This is done by providing a config
  *   specification to eglChooseConfig() that has the attribute
  *   EGL10.ELG_RENDERABLE_TYPE containing the EGL_OPENGL_ES2_BIT flag
  *   set. See ConfigChooser class definition below.
diff --git a/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularConfigChooser.java b/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularConfigChooser.java
index 445238b1c2..9834fdfb88 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularConfigChooser.java
+++ b/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularConfigChooser.java
@@ -45,20 +45,18 @@ public class RegularConfigChooser implements GLSurfaceView.EGLConfigChooser {
 
 	private int[] mValue = new int[1];
 
-	// FIXME: Add support for Vulkan.
-
-	/* This EGL config specification is used to specify 2.0 rendering.
+	/* This EGL config specification is used to specify 3.0 rendering.
 	 * We use a minimum size of 4 bits for red/green/blue, but will
 	 * perform actual matching in chooseConfig() below.
 	 */
 	private static int EGL_OPENGL_ES2_BIT = 4;
-	private static int[] s_configAttribs2 = {
+	private static int[] s_configAttribs = {
 		EGL10.EGL_RED_SIZE, 4,
 		EGL10.EGL_GREEN_SIZE, 4,
 		EGL10.EGL_BLUE_SIZE, 4,
-		//  EGL10.EGL_DEPTH_SIZE,     16,
+		// EGL10.EGL_DEPTH_SIZE,     16,
 		// EGL10.EGL_STENCIL_SIZE,   EGL10.EGL_DONT_CARE,
-		EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, //apparently there is no EGL_OPENGL_ES3_BIT
 		EGL10.EGL_NONE
 	};
 
@@ -75,7 +73,7 @@ public class RegularConfigChooser implements GLSurfaceView.EGLConfigChooser {
 		/* Get the number of minimally matching EGL configurations
 		 */
 		int[] num_config = new int[1];
-		egl.eglChooseConfig(display, s_configAttribs2, null, 0, num_config);
+		egl.eglChooseConfig(display, s_configAttribs, null, 0, num_config);
 
 		int numConfigs = num_config[0];
 
@@ -86,7 +84,7 @@ public class RegularConfigChooser implements GLSurfaceView.EGLConfigChooser {
 		/* Allocate then read the array of minimally matching EGL configs
 		 */
 		EGLConfig[] configs = new EGLConfig[numConfigs];
-		egl.eglChooseConfig(display, s_configAttribs2, configs, numConfigs, num_config);
+		egl.eglChooseConfig(display, s_configAttribs, configs, numConfigs, num_config);
 
 		if (GLUtils.DEBUG) {
 			GLUtils.printConfigs(egl, display, configs);
diff --git a/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularContextFactory.java b/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularContextFactory.java
index 5d62723170..8fb86bf6d0 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularContextFactory.java
+++ b/platform/android/java/lib/src/org/godotengine/godot/xr/regular/RegularContextFactory.java
@@ -52,17 +52,16 @@ public class RegularContextFactory implements GLSurfaceView.EGLContextFactory {
 	private static int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
 
 	public EGLContext createContext(EGL10 egl, EGLDisplay display, EGLConfig eglConfig) {
-		// FIXME: Add support for Vulkan.
-		Log.w(TAG, "creating OpenGL ES 2.0 context :");
+		Log.w(TAG, "creating OpenGL ES 3.0 context :");
 
 		GLUtils.checkEglError(TAG, "Before eglCreateContext", egl);
 		EGLContext context;
 		if (GLUtils.use_debug_opengl) {
-			int[] attrib_list2 = { EGL_CONTEXT_CLIENT_VERSION, 2, _EGL_CONTEXT_FLAGS_KHR, _EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR, EGL10.EGL_NONE };
-			context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list2);
+			int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 3, _EGL_CONTEXT_FLAGS_KHR, _EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR, EGL10.EGL_NONE };
+			context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
 		} else {
-			int[] attrib_list2 = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE };
-			context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list2);
+			int[] attrib_list = { EGL_CONTEXT_CLIENT_VERSION, 3, EGL10.EGL_NONE };
+			context = egl.eglCreateContext(display, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
 		}
 		GLUtils.checkEglError(TAG, "After eglCreateContext", egl);
 		return context;
diff --git a/platform/android/java/nativeSrcsConfigs/CMakeLists.txt b/platform/android/java/nativeSrcsConfigs/CMakeLists.txt
index 711f7cd502..1325063a57 100644
--- a/platform/android/java/nativeSrcsConfigs/CMakeLists.txt
+++ b/platform/android/java/nativeSrcsConfigs/CMakeLists.txt
@@ -17,4 +17,4 @@ target_include_directories(${PROJECT_NAME}
         SYSTEM PUBLIC
         ${GODOT_ROOT_DIR})
 
-add_definitions(-DUNIX_ENABLED -DVULKAN_ENABLED -DANDROID_ENABLED)
+add_definitions(-DUNIX_ENABLED -DVULKAN_ENABLED -DANDROID_ENABLED -DGLES3_ENABLED)
diff --git a/platform/android/os_android.cpp b/platform/android/os_android.cpp
index cb43f26425..4f81e4bccd 100644
--- a/platform/android/os_android.cpp
+++ b/platform/android/os_android.cpp
@@ -478,7 +478,6 @@ OS_Android::OS_Android(GodotJavaWrapper *p_godot_java, GodotIOJavaWrapper *p_god
 
 #if defined(GLES3_ENABLED)
 	gl_extensions = nullptr;
-	use_gl2 = false;
 #endif
 
 #if defined(VULKAN_ENABLED)