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-rw-r--r--gfx/gl/EGLUtils.cpp114
1 files changed, 114 insertions, 0 deletions
diff --git a/gfx/gl/EGLUtils.cpp b/gfx/gl/EGLUtils.cpp
new file mode 100644
index 000000000..bc55d7fb0
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+++ b/gfx/gl/EGLUtils.cpp
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+/* 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 "EGLUtils.h"
+
+#include "GLContextEGL.h"
+
+namespace mozilla {
+namespace gl {
+
+bool
+DoesEGLContextSupportSharingWithEGLImage(GLContext* gl)
+{
+ return sEGLLibrary.HasKHRImageBase() &&
+ sEGLLibrary.HasKHRImageTexture2D() &&
+ gl->IsExtensionSupported(GLContext::OES_EGL_image);
+}
+
+EGLImage
+CreateEGLImage(GLContext* gl, GLuint tex)
+{
+ MOZ_ASSERT(DoesEGLContextSupportSharingWithEGLImage(gl));
+
+ EGLClientBuffer clientBuffer = (EGLClientBuffer)((uint64_t)tex);
+ EGLContext eglContext = GLContextEGL::Cast(gl)->mContext;
+ EGLImage image = sEGLLibrary.fCreateImage(EGL_DISPLAY(),
+ eglContext,
+ LOCAL_EGL_GL_TEXTURE_2D,
+ clientBuffer,
+ nullptr);
+ return image;
+}
+
+////////////////////////////////////////////////////////////////////////
+// EGLImageWrapper
+
+/*static*/ EGLImageWrapper*
+EGLImageWrapper::Create(GLContext* gl, GLuint tex)
+{
+ MOZ_ASSERT(DoesEGLContextSupportSharingWithEGLImage(gl));
+
+ GLLibraryEGL& library = sEGLLibrary;
+ EGLDisplay display = EGL_DISPLAY();
+ EGLContext eglContext = GLContextEGL::Cast(gl)->mContext;
+ EGLClientBuffer clientBuffer = (EGLClientBuffer)((uint64_t)tex);
+ EGLImage image = library.fCreateImage(display,
+ eglContext,
+ LOCAL_EGL_GL_TEXTURE_2D,
+ clientBuffer,
+ nullptr);
+ if (!image) {
+#ifdef DEBUG
+ printf_stderr("Could not create EGL images: ERROR (0x%04x)\n",
+ sEGLLibrary.fGetError());
+#endif
+ return nullptr;
+ }
+
+ return new EGLImageWrapper(library, display, image);
+}
+
+EGLImageWrapper::~EGLImageWrapper()
+{
+ mLibrary.fDestroyImage(mDisplay, mImage);
+}
+
+bool
+EGLImageWrapper::FenceSync(GLContext* gl)
+{
+ MOZ_ASSERT(!mSync);
+
+ if (mLibrary.IsExtensionSupported(GLLibraryEGL::KHR_fence_sync)) {
+ mSync = mLibrary.fCreateSync(mDisplay,
+ 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.
+ gl->fFlush();
+ }
+
+ if (!mSync) {
+ // we failed to create one, so just do a finish
+ gl->fFinish();
+ }
+
+ return true;
+}
+
+bool
+EGLImageWrapper::ClientWaitSync()
+{
+ if (!mSync) {
+ // 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 = mLibrary.fClientWaitSync(mDisplay,
+ mSync,
+ 0,
+ timeout);
+ mLibrary.fDestroySync(mDisplay, mSync);
+ mSync = nullptr;
+
+ return result == LOCAL_EGL_CONDITION_SATISFIED;
+}
+
+} // namespace gl
+} // namespace mozilla