Bug 1048721 - Implement WebGL2Sync. r=jgilbert

dom/canvas/WebGL2ContextSync.cpp

@@ -4,7 +4,9 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "WebGL2Context.h"
+
 #include "GLContext.h"
+#include "WebGLSync.h"
 
 using namespace mozilla;
 using namespace mozilla::dom;
@@ -15,38 +17,117 @@ using namespace mozilla::dom;
 already_AddRefed<WebGLSync>
 WebGL2Context::FenceSync(GLenum condition, GLbitfield flags)
 {
-    MOZ_CRASH("Not Implemented.");
+   if (IsContextLost())
-    return nullptr;
+       return nullptr;
+
+   if (condition != LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE) {
+       ErrorInvalidEnum("fenceSync: condition must be SYNC_GPU_COMMANDS_COMPLETE");
+       return nullptr;
+   }
+
+   if (flags != 0) {
+       ErrorInvalidValue("fenceSync: flags must be 0");
+       return nullptr;
+   }
+
+   MakeContextCurrent();
+   nsRefPtr<WebGLSync> globj = new WebGLSync(this, condition, flags);
+   return globj.forget();
 }
 
 bool
 WebGL2Context::IsSync(WebGLSync* sync)
 {
-    MOZ_CRASH("Not Implemented.");
+   if (IsContextLost())
-    return false;
+       return false;
+
+   return ValidateObjectAllowDeleted("isSync", sync) && !sync->IsDeleted();
 }
 
 void
 WebGL2Context::DeleteSync(WebGLSync* sync)
 {
-    MOZ_CRASH("Not Implemented.");
+    if (IsContextLost())
+        return;
+
+    if (!ValidateObjectAllowDeletedOrNull("deleteSync", sync))
+        return;
+
+    if (!sync || sync->IsDeleted())
+        return;
+
+    sync->RequestDelete();
 }
 
 GLenum
 WebGL2Context::ClientWaitSync(WebGLSync* sync, GLbitfield flags, GLuint64 timeout)
 {
-    MOZ_CRASH("Not Implemented.");
+    if (IsContextLost())
-    return LOCAL_GL_FALSE;
+        return LOCAL_GL_WAIT_FAILED;
+
+    if (!sync || sync->IsDeleted()) {
+        ErrorInvalidValue("clientWaitSync: sync is not a sync object.");
+        return LOCAL_GL_WAIT_FAILED;
+    }
+
+    if (flags != 0 && flags != LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT) {
+        ErrorInvalidValue("clientWaitSync: flag must be SYNC_FLUSH_COMMANDS_BIT or 0");
+        return LOCAL_GL_WAIT_FAILED;
+    }
+
+    MakeContextCurrent();
+    return gl->fClientWaitSync(sync->mGLName, flags, timeout);
 }
 
 void
 WebGL2Context::WaitSync(WebGLSync* sync, GLbitfield flags, GLuint64 timeout)
 {
-    MOZ_CRASH("Not Implemented.");
+    if (IsContextLost())
+        return;
+
+    if (!sync || sync->IsDeleted()) {
+        ErrorInvalidValue("waitSync: sync is not a sync object.");
+        return;
+    }
+
+    if (flags != 0) {
+        ErrorInvalidValue("waitSync: flags must be 0");
+        return;
+    }
+
+    if (timeout != LOCAL_GL_TIMEOUT_IGNORED) {
+        ErrorInvalidValue("waitSync: timeout must be TIMEOUT_IGNORED");
+        return;
+    }
+
+    MakeContextCurrent();
+    gl->fWaitSync(sync->mGLName, flags, timeout);
 }
 
 void
 WebGL2Context::GetSyncParameter(JSContext*, WebGLSync* sync, GLenum pname, JS::MutableHandleValue retval)
 {
-    MOZ_CRASH("Not Implemented.");
+    if (IsContextLost())
+        return;
+
+    if (!sync || sync->IsDeleted()) {
+        ErrorInvalidValue("getSyncParameter: sync is not a sync object.");
+        return;
+    }
+
+    retval.set(JS::NullValue());
+
+    GLint result = 0;
+    switch (pname) {
+    case LOCAL_GL_OBJECT_TYPE:
+    case LOCAL_GL_SYNC_STATUS:
+    case LOCAL_GL_SYNC_CONDITION:
+    case LOCAL_GL_SYNC_FLAGS:
+        MakeContextCurrent();
+        gl->fGetSynciv(sync->mGLName, pname, 1, nullptr, &result);
+        retval.set(JS::Int32Value(result));
+        break;
+    }
+
+    ErrorInvalidEnum("getSyncParameter: Invalid pname 0x%04x", pname);
 }

dom/canvas/WebGLContext.h

@@ -1591,6 +1591,7 @@ public:
     friend class WebGLBuffer;
     friend class WebGLSampler;
     friend class WebGLShader;
+    friend class WebGLSync;
     friend class WebGLTransformFeedback;
     friend class WebGLUniformLocation;
     friend class WebGLVertexArray;

dom/canvas/WebGLSync.cpp

@@ -9,26 +9,30 @@
 
 namespace mozilla {
 
-WebGLSync::WebGLSync(WebGLContext* webgl):
+WebGLSync::WebGLSync(WebGLContext* webgl, GLenum condition, GLbitfield flags)
-    WebGLContextBoundObject(webgl)
+    : WebGLContextBoundObject(webgl)
 {
-    MOZ_CRASH("Not Implemented.");
+   mGLName = mContext->gl->fFenceSync(condition, flags);
 }
 
 WebGLSync::~WebGLSync()
-{}
+{
+    DeleteOnce();
+}
 
 void
 WebGLSync::Delete()
 {
-    MOZ_CRASH("Not Implemented.");
+    mContext->MakeContextCurrent();
+    mContext->gl->fDeleteSync(mGLName);
+    mGLName = 0;
+    LinkedListElement<WebGLSync>::remove();
 }
 
 WebGLContext*
 WebGLSync::GetParentObject() const
 {
-    MOZ_CRASH("Not Implemented.");
+    return Context();
-    return nullptr;
 }
 
 // -------------------------------------------------------------------------

dom/canvas/WebGLSync.h

@@ -21,7 +21,7 @@ class WebGLSync final
     friend class WebGL2Context;
 
 public:
-    explicit WebGLSync(WebGLContext* webgl);
+    WebGLSync(WebGLContext* webgl, GLenum condition, GLbitfield flags);
 
     void Delete();
     WebGLContext* GetParentObject() const;
@@ -33,6 +33,8 @@ public:
 
 private:
     ~WebGLSync();
+
+    GLsync mGLName;
 };
 
 } // namespace mozilla