Minimal port of Android EGL code from Dolphin.

Common/GL/GLInterface/EGL.cpp

@@ -0,0 +1,228 @@
+// Copyright 2012 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <array>
+#include <cstdlib>
+
+#include "Common/GL/GLInterface/EGL.h"
+#include "Common/Log.h"
+
+// Show the current FPS
+void cInterfaceEGL::Swap()
+{
+	eglSwapBuffers(egl_dpy, egl_surf);
+}
+void cInterfaceEGL::SwapInterval(int Interval)
+{
+	eglSwapInterval(egl_dpy, Interval);
+}
+
+void* cInterfaceEGL::GetFuncAddress(const std::string& name)
+{
+	return (void*)eglGetProcAddress(name.c_str());
+}
+
+void cInterfaceEGL::DetectMode()
+{
+	if (s_opengl_mode != MODE_DETECT)
+		return;
+
+	EGLint num_configs;
+	bool supportsGL = false, supportsGLES2 = false, supportsGLES3 = false;
+	std::array<int, 3> renderable_types = {
+		EGL_OPENGL_BIT,
+		(1 << 6), /* EGL_OPENGL_ES3_BIT_KHR */
+		EGL_OPENGL_ES2_BIT,
+	};
+
+	for (auto renderable_type : renderable_types)
+	{
+		// attributes for a visual in RGBA format with at least
+		// 8 bits per color
+		int attribs[] = {
+			EGL_RED_SIZE, 8,
+			EGL_GREEN_SIZE, 8,
+			EGL_BLUE_SIZE, 8,
+			EGL_RENDERABLE_TYPE, renderable_type,
+			EGL_NONE
+		};
+
+		// Get how many configs there are
+		if (!eglChooseConfig( egl_dpy, attribs, nullptr, 0, &num_configs))
+		{
+			INFO_LOG(G3D, "Error: couldn't get an EGL visual config\n");
+			continue;
+		}
+
+		EGLConfig* config = new EGLConfig[num_configs];
+
+		// Get all the configurations
+		if (!eglChooseConfig(egl_dpy, attribs, config, num_configs, &num_configs))
+		{
+			INFO_LOG(G3D, "Error: couldn't get an EGL visual config\n");
+			delete[] config;
+			continue;
+		}
+
+		for (int i = 0; i < num_configs; ++i)
+		{
+			EGLint attribVal;
+			bool ret;
+			ret = eglGetConfigAttrib(egl_dpy, config[i], EGL_RENDERABLE_TYPE, &attribVal);
+			if (ret)
+			{
+				if (attribVal & EGL_OPENGL_BIT)
+					supportsGL = true;
+				if (attribVal & (1 << 6)) /* EGL_OPENGL_ES3_BIT_KHR */
+					supportsGLES3 = true;
+				if (attribVal & EGL_OPENGL_ES2_BIT)
+					supportsGLES2 = true;
+			}
+		}
+		delete[] config;
+	}
+
+	if (supportsGL)
+		s_opengl_mode = GLInterfaceMode::MODE_OPENGL;
+	else if (supportsGLES3)
+		s_opengl_mode = GLInterfaceMode::MODE_OPENGLES3;
+	else if (supportsGLES2)
+		s_opengl_mode = GLInterfaceMode::MODE_OPENGLES2;
+
+	if (s_opengl_mode == GLInterfaceMode::MODE_DETECT) // Errored before we found a mode
+		s_opengl_mode = GLInterfaceMode::MODE_OPENGL; // Fall back to OpenGL
+}
+
+// Create rendering window.
+// Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize()
+bool cInterfaceEGL::Create(void *window_handle, bool core)
+{
+	const char *s;
+	EGLint egl_major, egl_minor;
+
+	egl_dpy = OpenDisplay();
+
+	if (!egl_dpy)
+	{
+		INFO_LOG(G3D, "Error: eglGetDisplay() failed\n");
+		return false;
+	}
+
+	if (!eglInitialize(egl_dpy, &egl_major, &egl_minor))
+	{
+		INFO_LOG(G3D, "Error: eglInitialize() failed\n");
+		return false;
+	}
+
+	/* Detection code */
+	EGLConfig config;
+	EGLint num_configs;
+
+	DetectMode();
+
+	// attributes for a visual in RGBA format with at least
+	// 8 bits per color
+	int attribs[] = {
+		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL_RED_SIZE, 8,
+		EGL_GREEN_SIZE, 8,
+		EGL_BLUE_SIZE, 8,
+		EGL_NONE };
+
+	EGLint ctx_attribs[] = {
+		EGL_CONTEXT_CLIENT_VERSION, 2,
+		EGL_NONE
+	};
+	switch (s_opengl_mode)
+	{
+		case MODE_OPENGL:
+			attribs[1] = EGL_OPENGL_BIT;
+			ctx_attribs[0] = EGL_NONE;
+		break;
+		case MODE_OPENGLES2:
+			attribs[1] = EGL_OPENGL_ES2_BIT;
+			ctx_attribs[1] = 2;
+		break;
+		case MODE_OPENGLES3:
+			attribs[1] = (1 << 6); /* EGL_OPENGL_ES3_BIT_KHR */
+			ctx_attribs[1] = 3;
+		break;
+		default:
+			ERROR_LOG(G3D, "Unknown opengl mode set\n");
+			return false;
+		break;
+	}
+
+	if (!eglChooseConfig( egl_dpy, attribs, &config, 1, &num_configs))
+	{
+		INFO_LOG(G3D, "Error: couldn't get an EGL visual config\n");
+		exit(1);
+	}
+
+	if (s_opengl_mode == MODE_OPENGL)
+		eglBindAPI(EGL_OPENGL_API);
+	else
+		eglBindAPI(EGL_OPENGL_ES_API);
+
+	EGLNativeWindowType host_window = (EGLNativeWindowType) window_handle;
+	EGLNativeWindowType native_window = InitializePlatform(host_window, config);
+
+	s = eglQueryString(egl_dpy, EGL_VERSION);
+	INFO_LOG(G3D, "EGL_VERSION = %s\n", s);
+
+	s = eglQueryString(egl_dpy, EGL_VENDOR);
+	INFO_LOG(G3D, "EGL_VENDOR = %s\n", s);
+
+	s = eglQueryString(egl_dpy, EGL_EXTENSIONS);
+	INFO_LOG(G3D, "EGL_EXTENSIONS = %s\n", s);
+
+	s = eglQueryString(egl_dpy, EGL_CLIENT_APIS);
+	INFO_LOG(G3D, "EGL_CLIENT_APIS = %s\n", s);
+
+	egl_ctx = eglCreateContext(egl_dpy, config, EGL_NO_CONTEXT, ctx_attribs );
+	if (!egl_ctx)
+	{
+		INFO_LOG(G3D, "Error: eglCreateContext failed\n");
+		exit(1);
+	}
+
+	egl_surf = eglCreateWindowSurface(egl_dpy, config, native_window, nullptr);
+	if (!egl_surf)
+	{
+		INFO_LOG(G3D, "Error: eglCreateWindowSurface failed\n");
+		exit(1);
+	}
+
+	return true;
+}
+
+bool cInterfaceEGL::MakeCurrent()
+{
+	return eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx);
+}
+
+bool cInterfaceEGL::ClearCurrent()
+{
+	return eglMakeCurrent(egl_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+}
+
+// Close backend
+void cInterfaceEGL::Shutdown()
+{
+	ShutdownPlatform();
+	if (egl_ctx && !eglMakeCurrent(egl_dpy, egl_surf, egl_surf, egl_ctx))
+		NOTICE_LOG(G3D, "Could not release drawing context.");
+	if (egl_ctx)
+	{
+		eglMakeCurrent(egl_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+		if (!eglDestroyContext(egl_dpy, egl_ctx))
+			NOTICE_LOG(G3D, "Could not destroy drawing context.");
+		if (!eglDestroySurface(egl_dpy, egl_surf))
+			NOTICE_LOG(G3D, "Could not destroy window surface.");
+		if (!eglTerminate(egl_dpy))
+			NOTICE_LOG(G3D, "Could not destroy display connection.");
+		egl_ctx = nullptr;
+		egl_dpy = nullptr;
+	}
+}

Common/GL/GLInterface/EGL.h

@@ -0,0 +1,32 @@
+// Copyright 2008 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+#include <EGL/egl.h>
+
+#include "Common/GL/GLInterfaceBase.h"
+
+class cInterfaceEGL : public cInterfaceBase
+{
+protected:
+	void DetectMode();
+	EGLSurface egl_surf;
+	EGLContext egl_ctx;
+	EGLDisplay egl_dpy;
+
+	virtual EGLDisplay OpenDisplay() = 0;
+	virtual EGLNativeWindowType InitializePlatform(EGLNativeWindowType host_window, EGLConfig config) = 0;
+	virtual void ShutdownPlatform() = 0;
+public:
+	void SwapInterval(int Interval);
+	void Swap();
+	void SetMode(u32 mode) { s_opengl_mode = mode; }
+	void* GetFuncAddress(const std::string& name);
+	bool Create(void *window_handle, bool core);
+	bool MakeCurrent();
+	bool ClearCurrent();
+	void Shutdown();
+};

Common/GL/GLInterface/EGLAndroid.cpp

@@ -0,0 +1,28 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Common/GL/GLInterface/EGLAndroid.h"
+
+EGLDisplay cInterfaceEGLAndroid::OpenDisplay()
+{
+	return eglGetDisplay(EGL_DEFAULT_DISPLAY);
+}
+
+EGLNativeWindowType cInterfaceEGLAndroid::InitializePlatform(EGLNativeWindowType host_window, EGLConfig config)
+{
+	EGLint format;
+	eglGetConfigAttrib(egl_dpy, config, EGL_NATIVE_VISUAL_ID, &format);
+	ANativeWindow_setBuffersGeometry(host_window, 0, 0, format);
+
+	const int width = ANativeWindow_getWidth(host_window);
+	const int height = ANativeWindow_getHeight(host_window);
+	SetBackBufferDimensions(width, height);
+
+	return host_window;
+}
+
+void cInterfaceEGLAndroid::ShutdownPlatform()
+{
+}
+

Common/GL/GLInterface/EGLAndroid.h

@@ -0,0 +1,15 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "Common/GL/GLInterface/EGL.h"
+
+class cInterfaceEGLAndroid : public cInterfaceEGL
+{
+protected:
+	EGLDisplay OpenDisplay() override;
+	EGLNativeWindowType InitializePlatform(EGLNativeWindowType host_window, EGLConfig config) override;
+	void ShutdownPlatform() override;
+};

Common/GL/GLInterface/GLInterface.cpp

@@ -0,0 +1,40 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Common/GL/GLInterfaceBase.h"
+
+#ifdef ANDROID
+#include "Common/GL/GLInterface/EGLAndroid.h"
+#elif defined(__APPLE__)
+#include "Common/GL/GLInterface/AGL.h"
+#elif defined(_WIN32)
+#include "Common/GL/GLInterface/WGL.h"
+#elif HAVE_X11
+#if defined(USE_EGL) && USE_EGL
+#include "Common/GL/GLInterface/EGLX11.h"
+#else
+#include "Common/GL/GLInterface/GLX.h"
+#endif
+#else
+#error Platform doesnt have a GLInterface
+#endif
+
+cInterfaceBase* HostGL_CreateGLInterface()
+{
+	#ifdef ANDROID
+		return new cInterfaceEGLAndroid;
+	#elif defined(__APPLE__)
+		return new cInterfaceAGL;
+	#elif defined(_WIN32)
+		return new cInterfaceWGL;
+	#elif defined(HAVE_X11) && HAVE_X11
+	#if defined(USE_EGL) && USE_EGL
+		return new cInterfaceEGLX11;
+	#else
+		return new cInterfaceGLX;
+	#endif
+	#else
+		return nullptr;
+	#endif
+}

Common/GL/GLInterfaceBase.h

@@ -0,0 +1,50 @@
+// Copyright 2008 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+
+#include "Common/CommonTypes.h"
+
+enum GLInterfaceMode {
+	MODE_DETECT = 0,
+	MODE_OPENGL,
+	MODE_OPENGLES2,
+	MODE_OPENGLES3,
+};
+
+class cInterfaceBase
+{
+protected:
+	// Window dimensions.
+	u32 s_backbuffer_width;
+	u32 s_backbuffer_height;
+
+	u32 s_opengl_mode;
+public:
+	cInterfaceBase() : s_backbuffer_width(0), s_backbuffer_height(0), s_opengl_mode(MODE_DETECT) {}
+	virtual ~cInterfaceBase() {}
+	virtual void Swap() {}
+	virtual void SetMode(u32 mode) { s_opengl_mode = GLInterfaceMode::MODE_OPENGL; }
+	virtual u32 GetMode() { return s_opengl_mode; }
+	virtual void* GetFuncAddress(const std::string& name) { return nullptr; }
+	virtual bool Create(void *window_handle, bool core = true) { return true; }
+	virtual bool MakeCurrent() { return true; }
+	virtual bool ClearCurrent() { return true; }
+	virtual void Shutdown() {}
+
+	virtual void SwapInterval(int Interval) { }
+	virtual u32 GetBackBufferWidth() { return s_backbuffer_width; }
+	virtual u32 GetBackBufferHeight() { return s_backbuffer_height; }
+	virtual void SetBackBufferDimensions(u32 W, u32 H) {s_backbuffer_width = W; s_backbuffer_height = H; }
+	virtual void Update() { }
+	virtual bool PeekMessages() { return false; }
+};
+
+extern cInterfaceBase *GLInterface;
+
+// This function has to be defined along the Host_ functions from Core/Host.h.
+// Current canonical implementation: DolphinWX/GLInterface/GLInterface.cpp.
+cInterfaceBase* HostGL_CreateGLInterface();