Saran Tunyasuvunakool
2f0fb1e4ef
OpenGL VSync became broken again in macOS 13 (https://github.com/glfw/glfw/issues/2249). This workaround is similar to https://github.com/glfw/glfw/pull/2277 but is implemented entirely outside of GLFW. PiperOrigin-RevId: 516320722 Change-Id: Ib8a651a942f592c74e00ad3c7b22f2dfd156be5f
76 lines
2.5 KiB
Plaintext
76 lines
2.5 KiB
Plaintext
// Copyright 2023 DeepMind Technologies Limited
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "glfw_corevideo.h"
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#include <condition_variable>
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#include <mutex>
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#include "glfw_adapter.h"
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#include "glfw_dispatch.h"
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// Workaround for perpertually broken OpenGL VSync on macOS,
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// most recently https://github.com/glfw/glfw/issues/2249.
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namespace mujoco {
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namespace {
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static int DisplayLinkCallbackTrampoline(CVDisplayLinkRef display_link,
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const CVTimeStamp* now,
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const CVTimeStamp* output_time,
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CVOptionFlags flags_in,
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CVOptionFlags* flags_out,
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void* user_context) {
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return static_cast<GlfwCoreVideo*>(user_context)->DisplayLinkCallback();
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}
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} // namespace
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GlfwCoreVideo::GlfwCoreVideo(GLFWwindow* window) : window_(window) {
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CVDisplayLinkCreateWithActiveCGDisplays(&display_link_);
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CVDisplayLinkSetOutputCallback(display_link_, &DisplayLinkCallbackTrampoline, this);
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CVDisplayLinkStart(display_link_);
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}
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GlfwCoreVideo::~GlfwCoreVideo() {
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CVDisplayLinkStop(display_link_);
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CVDisplayLinkRelease(display_link_);
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}
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void GlfwCoreVideo::EnqueueSwap() {
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std::unique_lock lock(mu_);
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second_buffer_has_content_ = true;
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}
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void GlfwCoreVideo::WaitForSwap() {
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if (second_buffer_has_content_) {
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std::unique_lock lock(mu_);
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cond_.wait(lock, [this]() { return !this->second_buffer_has_content_; });
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}
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}
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int GlfwCoreVideo::DisplayLinkCallback() {
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if (second_buffer_has_content_) {
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std::unique_lock lock(mu_);
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Glfw().glfwSwapBuffers(window_);
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second_buffer_has_content_ = false;
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cond_.notify_one();
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}
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return kCVReturnSuccess;
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}
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void GlfwCoreVideo::UpdateDisplayLink() {
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NSOpenGLContext* nsgl = Glfw().glfwGetNSGLContext(window_);
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CVDisplayLinkSetCurrentCGDisplayFromOpenGLContext(display_link_, [nsgl CGLContextObj],
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[nsgl.pixelFormat CGLPixelFormatObj]);
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}
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} // namespace mujoco
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