436 lines
18 KiB
C++

/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
//==============================================================================
// This byte-code is generated from native/java/com/rmsl/juce/JuceOpenGLView.java with min sdk version 16
// See juce_core/native/java/README.txt on how to generate this byte-code.
static const uint8 javaJuceOpenGLView[] =
{
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};
//==============================================================================
struct AndroidGLCallbacks
{
static void attachedToWindow (JNIEnv*, jobject, jlong);
static void detachedFromWindow (JNIEnv*, jobject, jlong);
static void dispatchDraw (JNIEnv*, jobject, jlong, jobject);
};
//==============================================================================
#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
METHOD (constructor, "<init>", "(Landroid/content/Context;J)V") \
METHOD (getParent, "getParent", "()Landroid/view/ViewParent;") \
METHOD (getHolder, "getHolder", "()Landroid/view/SurfaceHolder;") \
METHOD (layout, "layout", "(IIII)V" ) \
CALLBACK (AndroidGLCallbacks::attachedToWindow, "onAttchedWindowNative", "(J)V") \
CALLBACK (AndroidGLCallbacks::detachedFromWindow, "onDetachedFromWindowNative", "(J)V") \
CALLBACK (AndroidGLCallbacks::dispatchDraw, "onDrawNative", "(JLandroid/graphics/Canvas;)V")
DECLARE_JNI_CLASS_WITH_BYTECODE (JuceOpenGLViewSurface, "com/rmsl/juce/JuceOpenGLView", 16, javaJuceOpenGLView, sizeof(javaJuceOpenGLView))
#undef JNI_CLASS_MEMBERS
//==============================================================================
class OpenGLContext::NativeContext : private SurfaceHolderCallback
{
public:
NativeContext (Component& comp,
const OpenGLPixelFormat& pixelFormat,
void* /*contextToShareWith*/,
bool useMultisamplingIn,
OpenGLVersion)
: component (comp),
surface (EGL_NO_SURFACE), context (EGL_NO_CONTEXT)
{
auto env = getEnv();
// Do we have a native peer that we can attach to?
if (component.getPeer()->getNativeHandle() == nullptr)
return;
// Initialise the EGL display
if (! initEGLDisplay (pixelFormat, useMultisamplingIn))
return;
// create a native surface view
surfaceView = GlobalRef (LocalRef<jobject>(env->NewObject (JuceOpenGLViewSurface,
JuceOpenGLViewSurface.constructor,
getAppContext().get(),
reinterpret_cast<jlong> (this))));
if (surfaceView.get() == nullptr)
return;
// add the view to the view hierarchy
// after this the nativecontext can receive callbacks
env->CallVoidMethod ((jobject) component.getPeer()->getNativeHandle(),
AndroidViewGroup.addView, surfaceView.get());
// initialise the geometry of the view
auto bounds = component.getTopLevelComponent()->getLocalArea (&component, component.getLocalBounds());
bounds *= component.getDesktopScaleFactor();
updateWindowPosition (bounds);
hasInitialised = true;
}
~NativeContext() override
{
auto env = getEnv();
if (jobject viewParent = env->CallObjectMethod (surfaceView.get(), JuceOpenGLViewSurface.getParent))
env->CallVoidMethod (viewParent, AndroidViewGroup.removeView, surfaceView.get());
}
//==============================================================================
bool initialiseOnRenderThread (OpenGLContext& aContext)
{
jassert (hasInitialised);
// has the context already attached?
jassert (surface == EGL_NO_SURFACE && context == EGL_NO_CONTEXT);
auto env = getEnv();
ANativeWindow* window = nullptr;
LocalRef<jobject> holder (env->CallObjectMethod (surfaceView.get(), JuceOpenGLViewSurface.getHolder));
if (holder != nullptr)
{
LocalRef<jobject> jSurface (env->CallObjectMethod (holder.get(), AndroidSurfaceHolder.getSurface));
if (jSurface != nullptr)
{
window = ANativeWindow_fromSurface(env, jSurface.get());
// if we didn't succeed the first time, wait 25ms and try again
if (window == nullptr)
{
Thread::sleep (200);
window = ANativeWindow_fromSurface (env, jSurface.get());
}
}
}
if (window == nullptr)
{
// failed to get a pointer to the native window after second try so bail out
jassertfalse;
return false;
}
// create the surface
surface = eglCreateWindowSurface (display, config, window, nullptr);
jassert (surface != EGL_NO_SURFACE);
ANativeWindow_release (window);
// create the OpenGL context
EGLint contextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
context = eglCreateContext (display, config, EGL_NO_CONTEXT, contextAttribs);
jassert (context != EGL_NO_CONTEXT);
juceContext = &aContext;
return true;
}
void shutdownOnRenderThread()
{
jassert (hasInitialised);
// is there a context available to detach?
jassert (surface != EGL_NO_SURFACE && context != EGL_NO_CONTEXT);
eglDestroyContext (display, context);
context = EGL_NO_CONTEXT;
eglDestroySurface (display, surface);
surface = EGL_NO_SURFACE;
}
//==============================================================================
bool makeActive() const noexcept
{
if (! hasInitialised)
return false;
if (surface == EGL_NO_SURFACE || context == EGL_NO_CONTEXT)
return false;
if (! eglMakeCurrent (display, surface, surface, context))
return false;
return true;
}
bool isActive() const noexcept { return eglGetCurrentContext() == context; }
static void deactivateCurrentContext()
{
eglMakeCurrent (display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
//==============================================================================
void swapBuffers() const noexcept { eglSwapBuffers (display, surface); }
bool setSwapInterval (const int) { return false; }
int getSwapInterval() const { return 0; }
//==============================================================================
bool createdOk() const noexcept { return hasInitialised; }
void* getRawContext() const noexcept { return surfaceView.get(); }
GLuint getFrameBufferID() const noexcept { return 0; }
//==============================================================================
void updateWindowPosition (Rectangle<int> bounds)
{
if (lastBounds != bounds)
{
auto env = getEnv();
lastBounds = bounds;
auto r = bounds * Desktop::getInstance().getDisplays().getPrimaryDisplay()->scale;
env->CallVoidMethod (surfaceView.get(), JuceOpenGLViewSurface.layout,
(jint) r.getX(), (jint) r.getY(), (jint) r.getRight(), (jint) r.getBottom());
}
}
//==============================================================================
// Android Surface Callbacks:
void surfaceChanged (LocalRef<jobject> holder, int format, int width, int height) override
{
ignoreUnused (holder, format, width, height);
}
void surfaceCreated (LocalRef<jobject> holder) override;
void surfaceDestroyed (LocalRef<jobject> holder) override;
//==============================================================================
struct Locker { Locker (NativeContext&) {} };
Component& component;
private:
//==============================================================================
friend struct AndroidGLCallbacks;
void attachedToWindow()
{
auto* env = getEnv();
LocalRef<jobject> holder (env->CallObjectMethod (surfaceView.get(), JuceOpenGLViewSurface.getHolder));
if (surfaceHolderCallback == nullptr)
surfaceHolderCallback = GlobalRef (CreateJavaInterface (this, "android/view/SurfaceHolder$Callback"));
env->CallVoidMethod (holder, AndroidSurfaceHolder.addCallback, surfaceHolderCallback.get());
}
void detachedFromWindow()
{
if (surfaceHolderCallback != nullptr)
{
auto* env = getEnv();
LocalRef<jobject> holder (env->CallObjectMethod (surfaceView.get(), JuceOpenGLViewSurface.getHolder));
env->CallVoidMethod (holder.get(), AndroidSurfaceHolder.removeCallback, surfaceHolderCallback.get());
surfaceHolderCallback.clear();
}
}
void dispatchDraw (jobject /*canvas*/)
{
if (juceContext != nullptr)
juceContext->triggerRepaint();
}
bool tryChooseConfig (const std::vector<EGLint>& optionalAttribs)
{
std::vector<EGLint> allAttribs
{
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_BLUE_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_RED_SIZE, 8,
EGL_ALPHA_SIZE, 0,
EGL_DEPTH_SIZE, 16
};
allAttribs.insert (allAttribs.end(), optionalAttribs.begin(), optionalAttribs.end());
allAttribs.push_back (EGL_NONE);
EGLint numConfigs{};
return eglChooseConfig (display, allAttribs.data(), &config, 1, &numConfigs);
}
//==============================================================================
bool initEGLDisplay (const OpenGLPixelFormat& pixelFormat, bool multisample)
{
// already initialised?
if (display != EGL_NO_DISPLAY)
return true;
if ((display = eglGetDisplay (EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY)
{
jassertfalse;
return false;
}
if (! eglInitialize (display, nullptr, nullptr))
{
jassertfalse;
return false;
}
if (tryChooseConfig ({ EGL_SAMPLE_BUFFERS, multisample ? 1 : 0, EGL_SAMPLES, pixelFormat.multisamplingLevel }))
return true;
if (tryChooseConfig ({}))
return true;
eglTerminate (display);
jassertfalse;
return false;
}
//==============================================================================
bool hasInitialised = false;
GlobalRef surfaceView;
Rectangle<int> lastBounds;
OpenGLContext* juceContext = nullptr;
EGLSurface surface;
EGLContext context;
GlobalRef surfaceHolderCallback;
static EGLDisplay display;
static EGLConfig config;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NativeContext)
};
//==============================================================================
void AndroidGLCallbacks::attachedToWindow (JNIEnv*, jobject /*this*/, jlong host)
{
if (auto* nativeContext = reinterpret_cast<OpenGLContext::NativeContext*> (host))
nativeContext->attachedToWindow();
}
void AndroidGLCallbacks::detachedFromWindow (JNIEnv*, jobject /*this*/, jlong host)
{
if (auto* nativeContext = reinterpret_cast<OpenGLContext::NativeContext*> (host))
nativeContext->detachedFromWindow();
}
void AndroidGLCallbacks::dispatchDraw (JNIEnv*, jobject /*this*/, jlong host, jobject canvas)
{
if (auto* nativeContext = reinterpret_cast<OpenGLContext::NativeContext*> (host))
nativeContext->dispatchDraw (canvas);
}
//==============================================================================
bool OpenGLHelpers::isContextActive()
{
return eglGetCurrentContext() != EGL_NO_CONTEXT;
}
} // namespace juce