1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "ui/gl/gl_fence_arb.h"
7 #include "base/strings/stringprintf.h"
8 #include "ui/gl/gl_bindings.h"
14 std::string
GetGLErrors() {
15 // Clears and logs all current gl errors.
16 std::string accumulated_errors
;
18 while ((error
= glGetError()) != GL_NO_ERROR
) {
19 accumulated_errors
+= base::StringPrintf("0x%x ", error
);
21 return accumulated_errors
;
26 GLFenceARB::GLFenceARB() {
27 sync_
= glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE
, 0);
28 DCHECK_EQ(GL_TRUE
, glIsSync(sync_
));
32 bool GLFenceARB::HasCompleted() {
33 // Handle the case where FenceSync failed.
37 DCHECK_EQ(GL_TRUE
, glIsSync(sync_
));
38 // We could potentially use glGetSynciv here, but it doesn't work
39 // on OSX 10.7 (always says the fence is not signaled yet).
40 // glClientWaitSync works better, so let's use that instead.
41 GLenum result
= glClientWaitSync(sync_
, 0, 0);
42 if (result
== GL_WAIT_FAILED
) {
43 LOG(FATAL
) << "Failed to wait for GLFence. error code:" << GetGLErrors();
45 return result
!= GL_TIMEOUT_EXPIRED
;
48 void GLFenceARB::ClientWait() {
49 DCHECK_EQ(GL_TRUE
, glIsSync(sync_
));
51 glClientWaitSync(sync_
, GL_SYNC_FLUSH_COMMANDS_BIT
, GL_TIMEOUT_IGNORED
);
52 DCHECK_NE(static_cast<GLenum
>(GL_TIMEOUT_EXPIRED
), result
);
53 if (result
== GL_WAIT_FAILED
) {
54 LOG(FATAL
) << "Failed to wait for GLFence. error code:" << GetGLErrors();
58 void GLFenceARB::ServerWait() {
59 DCHECK_EQ(GL_TRUE
, glIsSync(sync_
));
60 glWaitSync(sync_
, 0, GL_TIMEOUT_IGNORED
);
63 GLFenceARB::~GLFenceARB() {
64 DCHECK_EQ(GL_TRUE
, glIsSync(sync_
));