Add m-esr52 at 52.6.0

1 files changed, 214 insertions, 0 deletions

diff --git a/dom/canvas/WebGLTransformFeedback.cpp b/dom/canvas/WebGLTransformFeedback.cpp
new file mode 100644
index 000000000..feec581ea
--- /dev/null
+++ b/dom/canvas/WebGLTransformFeedback.cpp
@@ -0,0 +1,214 @@
+/* -*- 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 "WebGLTransformFeedback.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGL2RenderingContextBinding.h"
+#include "WebGL2Context.h"
+
+namespace mozilla {
+
+WebGLTransformFeedback::WebGLTransformFeedback(WebGLContext* webgl, GLuint tf)
+    : WebGLRefCountedObject(webgl)
+    , mGLName(tf)
+    , mIndexedBindings(webgl->mGLMaxTransformFeedbackSeparateAttribs)
+    , mIsPaused(false)
+    , mIsActive(false)
+{
+    mContext->mTransformFeedbacks.insertBack(this);
+}
+
+WebGLTransformFeedback::~WebGLTransformFeedback()
+{
+    DeleteOnce();
+}
+
+void
+WebGLTransformFeedback::Delete()
+{
+    if (mGLName) {
+        mContext->MakeContextCurrent();
+        mContext->gl->fDeleteTransformFeedbacks(1, &mGLName);
+    }
+    removeFrom(mContext->mTransformFeedbacks);
+}
+
+////////////////////////////////////////
+
+void
+WebGLTransformFeedback::BeginTransformFeedback(GLenum primMode)
+{
+    const char funcName[] = "beginTransformFeedback";
+
+    if (mIsActive)
+        return mContext->ErrorInvalidOperation("%s: Already active.", funcName);
+
+    switch (primMode) {
+    case LOCAL_GL_POINTS:
+    case LOCAL_GL_LINES:
+    case LOCAL_GL_TRIANGLES:
+        break;
+    default:
+        mContext->ErrorInvalidEnum("%s: `primitiveMode` must be one of POINTS, LINES, or"
+                                   " TRIANGLES.",
+                                   funcName);
+        return;
+    }
+
+    const auto& prog = mContext->mCurrentProgram;
+    if (!prog ||
+        !prog->IsLinked() ||
+        !prog->LinkInfo()->componentsPerTFVert.size())
+    {
+        mContext->ErrorInvalidOperation("%s: Current program not valid for transform"
+                                        " feedback.",
+                                        funcName);
+        return;
+    }
+
+    const auto& linkInfo = prog->LinkInfo();
+    const auto& componentsPerTFVert = linkInfo->componentsPerTFVert;
+
+    size_t minVertCapacity = SIZE_MAX;
+    for (size_t i = 0; i < componentsPerTFVert.size(); i++) {
+        const auto& indexedBinding = mIndexedBindings[i];
+        const auto& componentsPerVert = componentsPerTFVert[i];
+
+        const auto& buffer = indexedBinding.mBufferBinding;
+        if (!buffer) {
+            mContext->ErrorInvalidOperation("%s: No buffer attached to required transform"
+                                            " feedback index %u.",
+                                            funcName, (uint32_t)i);
+            return;
+        }
+
+        const size_t vertCapacity = buffer->ByteLength() / 4 / componentsPerVert;
+        minVertCapacity = std::min(minVertCapacity, vertCapacity);
+    }
+
+    ////
+
+    const auto& gl = mContext->gl;
+    gl->MakeCurrent();
+    gl->fBeginTransformFeedback(primMode);
+
+    ////
+
+    mIsActive = true;
+    MOZ_ASSERT(!mIsPaused);
+
+    mActive_Program = prog;
+    mActive_PrimMode = primMode;
+    mActive_VertPosition = 0;
+    mActive_VertCapacity = minVertCapacity;
+
+    ////
+
+    mActive_Program->mNumActiveTFOs++;
+}
+
+
+void
+WebGLTransformFeedback::EndTransformFeedback()
+{
+    const char funcName[] = "endTransformFeedback";
+
+    if (!mIsActive)
+        return mContext->ErrorInvalidOperation("%s: Not active.", funcName);
+
+    ////
+
+    const auto& gl = mContext->gl;
+    gl->MakeCurrent();
+    gl->fEndTransformFeedback();
+
+    ////
+
+    mIsActive = false;
+    mIsPaused = false;
+
+    ////
+
+    mActive_Program->mNumActiveTFOs--;
+}
+
+void
+WebGLTransformFeedback::PauseTransformFeedback()
+{
+    const char funcName[] = "pauseTransformFeedback";
+
+    if (!mIsActive ||
+        mIsPaused)
+    {
+        mContext->ErrorInvalidOperation("%s: Not active or is paused.", funcName);
+        return;
+    }
+
+    ////
+
+    const auto& gl = mContext->gl;
+    gl->MakeCurrent();
+    gl->fPauseTransformFeedback();
+
+    ////
+
+    mIsPaused = true;
+}
+
+void
+WebGLTransformFeedback::ResumeTransformFeedback()
+{
+    const char funcName[] = "resumeTransformFeedback";
+
+    if (!mIsPaused)
+        return mContext->ErrorInvalidOperation("%s: Not paused.", funcName);
+
+    if (mContext->mCurrentProgram != mActive_Program) {
+        mContext->ErrorInvalidOperation("%s: Active program differs from original.",
+                                        funcName);
+        return;
+    }
+
+    ////
+
+    const auto& gl = mContext->gl;
+    gl->MakeCurrent();
+    gl->fResumeTransformFeedback();
+
+    ////
+
+    MOZ_ASSERT(mIsActive);
+    mIsPaused = false;
+}
+
+////////////////////////////////////////
+
+void
+WebGLTransformFeedback::AddBufferBindCounts(int8_t addVal) const
+{
+    const GLenum target = LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER;
+    WebGLBuffer::AddBindCount(target, mGenericBufferBinding.get(), addVal);
+    for (const auto& binding : mIndexedBindings) {
+        WebGLBuffer::AddBindCount(target, binding.mBufferBinding.get(), addVal);
+    }
+}
+
+////////////////////////////////////////
+
+JSObject*
+WebGLTransformFeedback::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
+{
+    return dom::WebGLTransformFeedbackBinding::Wrap(cx, this, givenProto);
+}
+
+NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLTransformFeedback, AddRef)
+NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLTransformFeedback, Release)
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLTransformFeedback,
+                                      mGenericBufferBinding,
+                                      mIndexedBindings,
+                                      mActive_Program)
+
+} // namespace mozilla