зеркало из https://github.com/mozilla/gecko-dev.git
132 строки
3.7 KiB
C++
132 строки
3.7 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "EGLUtils.h"
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#include "GLContextEGL.h"
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#include "GLLibraryEGL.h"
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namespace mozilla {
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namespace gl {
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bool
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DoesEGLContextSupportSharingWithEGLImage(GLContext* gl)
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{
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auto* egl = gl::GLLibraryEGL::Get();
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return egl->HasKHRImageBase() &&
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egl->HasKHRImageTexture2D() &&
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gl->IsExtensionSupported(GLContext::OES_EGL_image);
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}
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EGLImage
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CreateEGLImage(GLContext* gl, GLuint tex)
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{
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MOZ_ASSERT(DoesEGLContextSupportSharingWithEGLImage(gl));
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auto* egl = gl::GLLibraryEGL::Get();
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EGLClientBuffer clientBuffer = (EGLClientBuffer)((uint64_t)tex);
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EGLContext eglContext = GLContextEGL::Cast(gl)->mContext;
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EGLImage image = egl->fCreateImage(EGL_DISPLAY(),
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eglContext,
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LOCAL_EGL_GL_TEXTURE_2D,
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clientBuffer,
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nullptr);
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return image;
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}
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////////////////////////////////////////////////////////////////////////
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// EGLImageWrapper
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/*static*/ EGLImageWrapper*
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EGLImageWrapper::Create(GLContext* gl, GLuint tex)
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{
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MOZ_ASSERT(DoesEGLContextSupportSharingWithEGLImage(gl));
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auto* egl = gl::GLLibraryEGL::Get();
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EGLDisplay display = EGL_DISPLAY();
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EGLContext eglContext = GLContextEGL::Cast(gl)->mContext;
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EGLClientBuffer clientBuffer = (EGLClientBuffer)((uint64_t)tex);
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EGLImage image = egl->fCreateImage(display,
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eglContext,
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LOCAL_EGL_GL_TEXTURE_2D,
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clientBuffer,
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nullptr);
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if (!image) {
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#ifdef DEBUG
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printf_stderr("Could not create EGL images: ERROR (0x%04x)\n",
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egl->fGetError());
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#endif
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return nullptr;
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}
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return new EGLImageWrapper(egl, display, image);
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}
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EGLImageWrapper::EGLImageWrapper(GLLibraryEGL* library,
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EGLDisplay display,
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EGLImage image)
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: mLibrary(library)
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, mDisplay(display)
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, mImage(image)
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, mSync(0)
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{
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MOZ_ASSERT(mImage);
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}
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EGLImageWrapper::~EGLImageWrapper()
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{
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mLibrary->fDestroyImage(mDisplay, mImage);
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}
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bool
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EGLImageWrapper::FenceSync(GLContext* gl)
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{
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MOZ_ASSERT(!mSync);
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if (mLibrary->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync)) {
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mSync = mLibrary->fCreateSync(mDisplay,
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LOCAL_EGL_SYNC_FENCE,
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nullptr);
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// We need to flush to make sure the sync object enters the command stream;
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// we can't use EGL_SYNC_FLUSH_COMMANDS_BIT at wait time, because the wait
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// happens on a different thread/context.
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gl->fFlush();
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}
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if (!mSync) {
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// we failed to create one, so just do a finish
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gl->fFinish();
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}
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return true;
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}
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bool
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EGLImageWrapper::ClientWaitSync()
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{
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if (!mSync) {
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// if we have no sync object, then we did a Finish() earlier
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return true;
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}
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// wait at most 1 second; this should really be never/rarely hit
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const uint64_t ns_per_ms = 1000 * 1000;
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EGLTime timeout = 1000 * ns_per_ms;
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EGLint result = mLibrary->fClientWaitSync(mDisplay,
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mSync,
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0,
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timeout);
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mLibrary->fDestroySync(mDisplay, mSync);
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mSync = nullptr;
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return result == LOCAL_EGL_CONDITION_SATISFIED;
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}
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} // namespace gl
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} // namespace mozilla
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