import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/canvas/WebGL2ContextTransformFeedback.cpp

@@ -0,0 +1,160 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "WebGL2Context.h"
+#include "WebGLActiveInfo.h"
+#include "WebGLProgram.h"
+#include "WebGLTransformFeedback.h"
+#include "GLContext.h"
+
+namespace mozilla {
+
+// -------------------------------------------------------------------------
+// Transform Feedback
+
+already_AddRefed<WebGLTransformFeedback>
+WebGL2Context::CreateTransformFeedback()
+{
+    if (IsContextLost())
+        return nullptr;
+
+    MakeContextCurrent();
+    GLuint tf = 0;
+    gl->fGenTransformFeedbacks(1, &tf);
+
+    RefPtr<WebGLTransformFeedback> ret = new WebGLTransformFeedback(this, tf);
+    return ret.forget();
+}
+
+void
+WebGL2Context::DeleteTransformFeedback(WebGLTransformFeedback* tf)
+{
+    const char funcName[] = "deleteTransformFeedback";
+    if (!ValidateDeleteObject(funcName, tf))
+        return;
+
+    if (tf->mIsActive) {
+        ErrorInvalidOperation("%s: Cannot delete active transform feedbacks.", funcName);
+        return;
+    }
+
+    if (mBoundTransformFeedback == tf) {
+        BindTransformFeedback(LOCAL_GL_TRANSFORM_FEEDBACK, nullptr);
+    }
+
+    tf->RequestDelete();
+}
+
+bool
+WebGL2Context::IsTransformFeedback(const WebGLTransformFeedback* tf)
+{
+    if (!ValidateIsObject("isTransformFeedback", tf))
+        return false;
+
+    MakeContextCurrent();
+    return gl->fIsTransformFeedback(tf->mGLName);
+}
+
+void
+WebGL2Context::BindTransformFeedback(GLenum target, WebGLTransformFeedback* tf)
+{
+    const char funcName[] = "bindTransformFeedback";
+    if (IsContextLost())
+        return;
+
+    if (target != LOCAL_GL_TRANSFORM_FEEDBACK)
+        return ErrorInvalidEnum("%s: `target` must be TRANSFORM_FEEDBACK.", funcName);
+
+    if (tf && !ValidateObject(funcName, *tf))
+        return;
+
+    if (mBoundTransformFeedback->mIsActive &&
+        !mBoundTransformFeedback->mIsPaused)
+    {
+        ErrorInvalidOperation("%s: Currently bound transform feedback is active and not"
+                              " paused.",
+                              funcName);
+        return;
+    }
+
+    ////
+
+    if (mBoundTransformFeedback) {
+        mBoundTransformFeedback->AddBufferBindCounts(-1);
+    }
+
+    mBoundTransformFeedback = (tf ? tf : mDefaultTransformFeedback);
+
+    MakeContextCurrent();
+    gl->fBindTransformFeedback(target, mBoundTransformFeedback->mGLName);
+
+    if (mBoundTransformFeedback) {
+        mBoundTransformFeedback->AddBufferBindCounts(+1);
+    }
+}
+
+void
+WebGL2Context::BeginTransformFeedback(GLenum primMode)
+{
+    if (IsContextLost())
+        return;
+
+    mBoundTransformFeedback->BeginTransformFeedback(primMode);
+}
+
+void
+WebGL2Context::EndTransformFeedback()
+{
+    if (IsContextLost())
+        return;
+
+    mBoundTransformFeedback->EndTransformFeedback();
+}
+
+void
+WebGL2Context::PauseTransformFeedback()
+{
+    if (IsContextLost())
+        return;
+
+    mBoundTransformFeedback->PauseTransformFeedback();
+}
+
+void
+WebGL2Context::ResumeTransformFeedback()
+{
+    if (IsContextLost())
+        return;
+
+    mBoundTransformFeedback->ResumeTransformFeedback();
+}
+
+void
+WebGL2Context::TransformFeedbackVaryings(WebGLProgram& program,
+                                         const dom::Sequence<nsString>& varyings,
+                                         GLenum bufferMode)
+{
+    if (IsContextLost())
+        return;
+
+    if (!ValidateObject("transformFeedbackVaryings: program", program))
+        return;
+
+    program.TransformFeedbackVaryings(varyings, bufferMode);
+}
+
+already_AddRefed<WebGLActiveInfo>
+WebGL2Context::GetTransformFeedbackVarying(const WebGLProgram& program, GLuint index)
+{
+    if (IsContextLost())
+        return nullptr;
+
+    if (!ValidateObject("getTransformFeedbackVarying: program", program))
+        return nullptr;
+
+    return program.GetTransformFeedbackVarying(index);
+}
+
+} // namespace mozilla