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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "AndroidSurfaceTexture.h"
#include "GLContextEGL.h"
#include "GLBlitHelper.h"
#include "GLImages.h"
#ifdef MOZ_WIDGET_ANDROID
# include "mozilla/java/GeckoSurfaceTextureNatives.h"
# include "AndroidNativeWindow.h"
#endif // MOZ_WIDGET_ANDROID
namespace mozilla {
namespace gl {
class AndroidSharedBlitGL final {
public:
explicit AndroidSharedBlitGL(const EGLNativeWindowType window) {
StaticMutexAutoLock lock(sMutex);
if (!sContext) {
MOZ_ASSERT(sInstanceCount == 0);
sContext = CreateContext();
if (!sContext) {
return;
}
}
const auto& egl = *(sContext->mEgl);
mTargetSurface = egl.fCreateWindowSurface(sContext->mConfig, window, 0);
++sInstanceCount;
}
~AndroidSharedBlitGL() {
StaticMutexAutoLock lock(sMutex);
if (mTargetSurface != EGL_NO_SURFACE) {
const auto& egl = *(sContext->mEgl);
egl.fDestroySurface(mTargetSurface);
}
// Destroy shared GL context when no one uses it.
if (--sInstanceCount == 0) {
sContext = nullptr;
}
}
void Blit(layers::SurfaceTextureImage* img, const gfx::IntSize& imageSize) {
StaticMutexAutoLock lock(sMutex);
MOZ_ASSERT(sContext);
// Setting overide also makes conext and surface current.
sContext->SetEGLSurfaceOverride(mTargetSurface);
#ifdef MOZ_WIDGET_ANDROID
sContext->BlitHelper()->BlitImage(img, imageSize, OriginPos::BottomLeft);
#else
MOZ_CRASH("bad platform");
#endif
sContext->SwapBuffers();
// This method is called through binder IPC and could run on any thread in
// the pool. Release the context and surface from this thread after use so
// they can be bound to another thread later.
UnmakeCurrent(sContext);
}
private:
static already_AddRefed<GLContextEGL> CreateContextImpl(bool aUseGles) {
sMutex.AssertCurrentThreadOwns();
MOZ_ASSERT(!sContext);
nsCString ignored;
const auto egl = gl::DefaultEglDisplay(&ignored);
EGLConfig eglConfig;
CreateConfig(*egl, &eglConfig, /* bpp */ 24, /* depth buffer? */ false,
aUseGles);
auto gl = GLContextEGL::CreateGLContext(egl, {}, eglConfig, EGL_NO_SURFACE,
true, &ignored);
if (!gl) {
NS_WARNING("Fail to create GL context for native blitter.");
return nullptr;
}
// Yield the current state made in constructor.
UnmakeCurrent(gl);
return gl.forget();
}
static already_AddRefed<GLContextEGL> CreateContext() {
RefPtr<GLContextEGL> gl;
#if !defined(MOZ_WIDGET_ANDROID)
gl = CreateContextImpl(/* aUseGles */ false);
#endif // !defined(MOZ_WIDGET_ANDROID)
if (!gl) {
gl = CreateContextImpl(/* aUseGles */ true);
}
return gl.forget();
}
static bool UnmakeCurrent(GLContextEGL* const gl) {
sMutex.AssertCurrentThreadOwns();
MOZ_ASSERT(gl);
if (!gl->IsCurrent()) {
return true;
}
const auto& egl = *(gl->mEgl);
return egl.fMakeCurrent(EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
static StaticMutex sMutex;
static StaticRefPtr<GLContextEGL> sContext;
static size_t sInstanceCount;
EGLSurface mTargetSurface;
};
StaticMutex AndroidSharedBlitGL::sMutex;
StaticRefPtr<GLContextEGL> AndroidSharedBlitGL::sContext;
size_t AndroidSharedBlitGL::sInstanceCount = 0;
// -
#ifdef MOZ_WIDGET_ANDROID
void AndroidSurfaceTexture::GetTransformMatrix(
java::sdk::SurfaceTexture::Param surfaceTexture,
gfx::Matrix4x4* outMatrix) {
JNIEnv* const env = jni::GetEnvForThread();
auto jarray = jni::FloatArray::LocalRef::Adopt(env, env->NewFloatArray(16));
surfaceTexture->GetTransformMatrix(jarray);
jfloat* array = env->GetFloatArrayElements(jarray.Get(), nullptr);
memcpy(&(outMatrix->_11), array, sizeof(float) * 16);
env->ReleaseFloatArrayElements(jarray.Get(), array, 0);
}
class GLBlitterSupport final
: public java::GeckoSurfaceTexture::NativeGLBlitHelper::Natives<
GLBlitterSupport> {
public:
using Base =
java::GeckoSurfaceTexture::NativeGLBlitHelper::Natives<GLBlitterSupport>;
using Base::AttachNative;
using Base::DisposeNative;
using Base::GetNative;
static java::GeckoSurfaceTexture::NativeGLBlitHelper::LocalRef NativeCreate(
jint sourceTextureHandle, jni::Object::Param targetSurface, jint width,
jint height) {
AndroidNativeWindow win(java::GeckoSurface::Ref::From(targetSurface));
auto helper = java::GeckoSurfaceTexture::NativeGLBlitHelper::New();
const auto& eglWindow = win.NativeWindow();
GLBlitterSupport::AttachNative(
helper,
MakeUnique<GLBlitterSupport>(MakeUnique<AndroidSharedBlitGL>(eglWindow),
sourceTextureHandle, width, height));
return helper;
}
GLBlitterSupport(UniquePtr<AndroidSharedBlitGL>&& gl,
jint sourceTextureHandle, jint width, jint height)
: mGl(std::move(gl)),
mSourceTextureHandle(sourceTextureHandle),
mSize(width, height) {}
void Blit() {
RefPtr<layers::SurfaceTextureImage> img = new layers::SurfaceTextureImage(
mSourceTextureHandle, mSize, false, OriginPos::TopLeft);
mGl->Blit(img, mSize);
}
private:
const UniquePtr<AndroidSharedBlitGL> mGl;
const AndroidSurfaceTextureHandle mSourceTextureHandle;
const gfx::IntSize mSize;
};
void AndroidSurfaceTexture::Init() { GLBlitterSupport::Init(); }
#endif // MOZ_WIDGET_ANDROID
} // namespace gl
} // namespace mozilla
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