From 7a05624e1b3371a2823a46749083fe4bc9eb4a60 Mon Sep 17 00:00:00 2001
From: Cameron Cawley
Date: Sun, 8 Sep 2019 19:37:48 +0100
Subject: ANDROID: Rewrite to make use of OpenGLGraphicsManager (#1695)

* ANDROID: Rewrite to make use of OpenGLGraphicsManager

* ANDROID: Fix emulated mouse button up events
---
 backends/platform/android/graphics.cpp | 134 +++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 backends/platform/android/graphics.cpp

(limited to 'backends/platform/android/graphics.cpp')

diff --git a/backends/platform/android/graphics.cpp b/backends/platform/android/graphics.cpp
new file mode 100644
index 0000000000..c22e9bf326
--- /dev/null
+++ b/backends/platform/android/graphics.cpp
@@ -0,0 +1,134 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+// Allow use of stuff in <time.h>
+#define FORBIDDEN_SYMBOL_EXCEPTION_time_h
+
+// Disable printf override in common/forbidden.h to avoid
+// clashes with log.h from the Android SDK.
+// That header file uses
+//   __attribute__ ((format(printf, 3, 4)))
+// which gets messed up by our override mechanism; this could
+// be avoided by either changing the Android SDK to use the equally
+// legal and valid
+//   __attribute__ ((format(printf, 3, 4)))
+// or by refining our printf override to use a varadic macro
+// (which then wouldn't be portable, though).
+// Anyway, for now we just disable the printf override globally
+// for the Android port
+#define FORBIDDEN_SYMBOL_EXCEPTION_printf
+
+#include "backends/platform/android/android.h"
+#include "backends/platform/android/graphics.h"
+#include "backends/platform/android/jni.h"
+
+//
+// AndroidGraphicsManager
+//
+AndroidGraphicsManager::AndroidGraphicsManager() {
+	ENTER();
+
+	// Initialize our OpenGL ES context.
+	initSurface();
+
+}
+
+AndroidGraphicsManager::~AndroidGraphicsManager() {
+	ENTER();
+
+	deinitSurface();
+}
+
+void AndroidGraphicsManager::initSurface() {
+	LOGD("initializing surface");
+
+	assert(!JNI::haveSurface());
+	JNI::initSurface();
+
+	// Notify the OpenGL code about our context.
+	// FIXME: Support OpenGL ES 2 contexts
+	setContextType(OpenGL::kContextGLES);
+
+	// We default to RGB565 and RGBA5551 which is closest to the actual output
+	// mode we setup.
+	notifyContextCreate(Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0), Graphics::PixelFormat(2, 5, 5, 5, 1, 11, 6, 1, 0));
+
+	handleResize(JNI::egl_surface_width, JNI::egl_surface_height);
+}
+
+void AndroidGraphicsManager::deinitSurface() {
+	if (!JNI::haveSurface())
+		return;
+
+	LOGD("deinitializing surface");
+
+	notifyContextDestroy();
+
+	JNI::deinitSurface();
+}
+
+void AndroidGraphicsManager::updateScreen() {
+	//ENTER();
+
+	if (!JNI::haveSurface())
+		return;
+
+	OpenGLGraphicsManager::updateScreen();
+}
+
+void AndroidGraphicsManager::displayMessageOnOSD(const char *msg) {
+	ENTER("%s", msg);
+
+	JNI::displayMessageOnOSD(msg);
+}
+
+bool AndroidGraphicsManager::loadVideoMode(uint requestedWidth, uint requestedHeight, const Graphics::PixelFormat &format) {
+	ENTER("%d, %d, %s", requestedWidth, requestedHeight, format.toString().c_str());
+
+	// We get this whenever a new resolution is requested. Since Android is
+	// using a fixed output size we do nothing like that here.
+	// TODO: Support screen rotation
+	return true;
+}
+
+void AndroidGraphicsManager::refreshScreen() {
+	//ENTER();
+
+	JNI::swapBuffers();
+}
+
+void *AndroidGraphicsManager::getProcAddress(const char *name) const {
+	ENTER("%s", name);
+
+	// TODO: Support dynamically loaded OpenGL
+	return nullptr;
+}
+
+bool AndroidGraphicsManager::notifyMousePosition(Common::Point &mouse) {
+	mouse.x = CLIP<int16>(mouse.x, _activeArea.drawRect.left, _activeArea.drawRect.right);
+	mouse.y = CLIP<int16>(mouse.y, _activeArea.drawRect.top, _activeArea.drawRect.bottom);
+
+	setMousePosition(mouse.x, mouse.y);
+	mouse = convertWindowToVirtual(mouse.x, mouse.y);
+
+	return true;
+}
-- 
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