gecko-dev/gfx/gl/GLSharedHandleHelpers.cpp

331 строка
9.8 KiB
C++

/* 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 "GLContextEGL.h"
#include "GLSharedHandleHelpers.h"
#ifdef MOZ_WIDGET_ANDROID
#include "nsSurfaceTexture.h"
#endif
namespace mozilla {
namespace gl {
enum SharedHandleType {
SharedHandleType_Image
#ifdef MOZ_WIDGET_ANDROID
, SharedHandleType_SurfaceTexture
#endif
};
class SharedTextureHandleWrapper
{
public:
SharedTextureHandleWrapper(SharedHandleType aHandleType) : mHandleType(aHandleType)
{
}
virtual ~SharedTextureHandleWrapper()
{
}
SharedHandleType Type() { return mHandleType; }
SharedHandleType mHandleType;
};
#ifdef MOZ_WIDGET_ANDROID
class SurfaceTextureWrapper: public SharedTextureHandleWrapper
{
public:
SurfaceTextureWrapper(nsSurfaceTexture* aSurfaceTexture) :
SharedTextureHandleWrapper(SharedHandleType_SurfaceTexture)
, mSurfaceTexture(aSurfaceTexture)
{
}
virtual ~SurfaceTextureWrapper() {
mSurfaceTexture = nullptr;
}
nsSurfaceTexture* SurfaceTexture() { return mSurfaceTexture; }
nsRefPtr<nsSurfaceTexture> mSurfaceTexture;
};
#endif // MOZ_WIDGET_ANDROID
class EGLTextureWrapper : public SharedTextureHandleWrapper
{
public:
EGLTextureWrapper() :
SharedTextureHandleWrapper(SharedHandleType_Image)
, mEGLImage(nullptr)
, mSyncObject(nullptr)
{
}
// Args are the active GL context, and a texture in that GL
// context for which to create an EGLImage. After the EGLImage
// is created, the texture is unused by EGLTextureWrapper.
bool CreateEGLImage(GLContext *ctx, uintptr_t texture) {
MOZ_ASSERT(!mEGLImage && texture && sEGLLibrary.HasKHRImageBase());
static const EGLint eglAttributes[] = {
LOCAL_EGL_NONE
};
EGLContext eglContext = GLContextEGL::Cast(ctx)->GetEGLContext();
mEGLImage = sEGLLibrary.fCreateImage(EGL_DISPLAY(), eglContext, LOCAL_EGL_GL_TEXTURE_2D,
(EGLClientBuffer)texture, eglAttributes);
if (!mEGLImage) {
#ifdef DEBUG
printf_stderr("Could not create EGL images: ERROR (0x%04x)\n", sEGLLibrary.fGetError());
#endif
return false;
}
return true;
}
virtual ~EGLTextureWrapper() {
if (mEGLImage) {
sEGLLibrary.fDestroyImage(EGL_DISPLAY(), mEGLImage);
mEGLImage = nullptr;
}
}
const EGLImage GetEGLImage() {
return mEGLImage;
}
// Insert a sync point on the given context, which should be the current active
// context.
bool MakeSync(GLContext *ctx) {
MOZ_ASSERT(mSyncObject == nullptr);
if (sEGLLibrary.IsExtensionSupported(GLLibraryEGL::KHR_fence_sync)) {
mSyncObject = sEGLLibrary.fCreateSync(EGL_DISPLAY(), LOCAL_EGL_SYNC_FENCE, nullptr);
// We need to flush to make sure the sync object enters the command stream;
// we can't use EGL_SYNC_FLUSH_COMMANDS_BIT at wait time, because the wait
// happens on a different thread/context.
ctx->fFlush();
}
if (mSyncObject == EGL_NO_SYNC) {
// we failed to create one, so just do a finish
ctx->fFinish();
}
return true;
}
bool WaitSync() {
if (!mSyncObject) {
// if we have no sync object, then we did a Finish() earlier
return true;
}
// wait at most 1 second; this should really be never/rarely hit
const uint64_t ns_per_ms = 1000 * 1000;
EGLTime timeout = 1000 * ns_per_ms;
EGLint result = sEGLLibrary.fClientWaitSync(EGL_DISPLAY(), mSyncObject, 0, timeout);
sEGLLibrary.fDestroySync(EGL_DISPLAY(), mSyncObject);
mSyncObject = nullptr;
return result == LOCAL_EGL_CONDITION_SATISFIED;
}
private:
EGLImage mEGLImage;
EGLSync mSyncObject;
};
static bool DoesEGLContextSupportSharingWithEGLImage(GLContext *gl)
{
return sEGLLibrary.HasKHRImageBase() &&
sEGLLibrary.HasKHRImageTexture2D() &&
gl->IsExtensionSupported(GLContext::OES_EGL_image);
}
SharedTextureHandle CreateSharedHandle(GLContext* gl,
SharedTextureShareType shareType,
void* buffer,
SharedTextureBufferType bufferType)
{
// unimplemented outside of EGL
if (gl->GetContextType() != GLContextType::EGL)
return 0;
// Both EGLImage and SurfaceTexture only support same-process currently, but
// it's possible to make SurfaceTexture work across processes. We should do that.
if (shareType != SharedTextureShareType::SameProcess)
return 0;
switch (bufferType) {
#ifdef MOZ_WIDGET_ANDROID
case SharedTextureBufferType::SurfaceTexture:
if (!gl->IsExtensionSupported(GLContext::OES_EGL_image_external)) {
NS_WARNING("Missing GL_OES_EGL_image_external");
return 0;
}
return (SharedTextureHandle) new SurfaceTextureWrapper(reinterpret_cast<nsSurfaceTexture*>(buffer));
#endif
case SharedTextureBufferType::TextureID: {
if (!DoesEGLContextSupportSharingWithEGLImage(gl))
return 0;
GLuint texture = (uintptr_t)buffer;
EGLTextureWrapper* tex = new EGLTextureWrapper();
if (!tex->CreateEGLImage(gl, texture)) {
NS_ERROR("EGLImage creation for EGLTextureWrapper failed");
delete tex;
return 0;
}
return (SharedTextureHandle)tex;
}
default:
NS_ERROR("Unknown shared texture buffer type");
return 0;
}
}
void ReleaseSharedHandle(GLContext* gl,
SharedTextureShareType shareType,
SharedTextureHandle sharedHandle)
{
// unimplemented outside of EGL
if (gl->GetContextType() != GLContextType::EGL)
return;
if (shareType != SharedTextureShareType::SameProcess) {
NS_ERROR("Implementation not available for this sharing type");
return;
}
SharedTextureHandleWrapper* wrapper = reinterpret_cast<SharedTextureHandleWrapper*>(sharedHandle);
switch (wrapper->Type()) {
#ifdef MOZ_WIDGET_ANDROID
case SharedHandleType_SurfaceTexture:
delete wrapper;
break;
#endif
case SharedHandleType_Image: {
NS_ASSERTION(DoesEGLContextSupportSharingWithEGLImage(gl), "EGLImage not supported or disabled in runtime");
EGLTextureWrapper* wrap = (EGLTextureWrapper*)sharedHandle;
delete wrap;
break;
}
default:
NS_ERROR("Unknown shared handle type");
return;
}
}
bool GetSharedHandleDetails(GLContext* gl,
SharedTextureShareType shareType,
SharedTextureHandle sharedHandle,
SharedHandleDetails& details)
{
// unimplemented outside of EGL
if (gl->GetContextType() != GLContextType::EGL)
return false;
if (shareType != SharedTextureShareType::SameProcess)
return false;
SharedTextureHandleWrapper* wrapper = reinterpret_cast<SharedTextureHandleWrapper*>(sharedHandle);
switch (wrapper->Type()) {
#ifdef MOZ_WIDGET_ANDROID
case SharedHandleType_SurfaceTexture: {
SurfaceTextureWrapper* surfaceWrapper = reinterpret_cast<SurfaceTextureWrapper*>(wrapper);
details.mTarget = LOCAL_GL_TEXTURE_EXTERNAL;
details.mTextureFormat = gfx::SurfaceFormat::R8G8B8A8;
surfaceWrapper->SurfaceTexture()->GetTransformMatrix(details.mTextureTransform);
break;
}
#endif
case SharedHandleType_Image:
details.mTarget = LOCAL_GL_TEXTURE_2D;
details.mTextureFormat = gfx::SurfaceFormat::R8G8B8A8;
break;
default:
NS_ERROR("Unknown shared handle type");
return false;
}
return true;
}
bool AttachSharedHandle(GLContext* gl,
SharedTextureShareType shareType,
SharedTextureHandle sharedHandle)
{
// unimplemented outside of EGL
if (gl->GetContextType() != GLContextType::EGL)
return false;
if (shareType != SharedTextureShareType::SameProcess)
return false;
SharedTextureHandleWrapper* wrapper = reinterpret_cast<SharedTextureHandleWrapper*>(sharedHandle);
switch (wrapper->Type()) {
#ifdef MOZ_WIDGET_ANDROID
case SharedHandleType_SurfaceTexture: {
#ifndef DEBUG
/*
* NOTE: SurfaceTexture spams us if there are any existing GL errors, so we'll clear
* them here in order to avoid that.
*/
gl->GetAndClearError();
#endif
SurfaceTextureWrapper* surfaceTextureWrapper = reinterpret_cast<SurfaceTextureWrapper*>(wrapper);
// FIXME: SurfaceTexture provides a transform matrix which is supposed to
// be applied to the texture coordinates. We should return that here
// so we can render correctly. Bug 775083
surfaceTextureWrapper->SurfaceTexture()->UpdateTexImage();
break;
}
#endif // MOZ_WIDGET_ANDROID
case SharedHandleType_Image: {
NS_ASSERTION(DoesEGLContextSupportSharingWithEGLImage(gl), "EGLImage not supported or disabled in runtime");
EGLTextureWrapper* wrap = (EGLTextureWrapper*)sharedHandle;
wrap->WaitSync();
gl->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_2D, wrap->GetEGLImage());
break;
}
default:
NS_ERROR("Unknown shared handle type");
return false;
}
return true;
}
/**
* Detach Shared GL Handle from GL_TEXTURE_2D target
*/
void DetachSharedHandle(GLContext*,
SharedTextureShareType,
SharedTextureHandle)
{
// currently a no-operation
}
}
}