Add m-esr52 at 52.6.0

1 files changed, 290 insertions, 0 deletions

diff --git a/dom/canvas/WebGLBuffer.cpp b/dom/canvas/WebGLBuffer.cpp
new file mode 100644
index 000000000..f202c9950
--- /dev/null
+++ b/dom/canvas/WebGLBuffer.cpp
@@ -0,0 +1,290 @@
+/* -*- Mode: C++; tab-width: 20; 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 "WebGLBuffer.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "WebGLContext.h"
+#include "WebGLElementArrayCache.h"
+
+namespace mozilla {
+
+WebGLBuffer::WebGLBuffer(WebGLContext* webgl, GLuint buf)
+    : WebGLRefCountedObject(webgl)
+    , mGLName(buf)
+    , mContent(Kind::Undefined)
+    , mUsage(LOCAL_GL_STATIC_DRAW)
+    , mByteLength(0)
+    , mTFBindCount(0)
+    , mNonTFBindCount(0)
+{
+    mContext->mBuffers.insertBack(this);
+}
+
+WebGLBuffer::~WebGLBuffer()
+{
+    DeleteOnce();
+}
+
+void
+WebGLBuffer::SetContentAfterBind(GLenum target)
+{
+    if (mContent != Kind::Undefined)
+        return;
+
+    switch (target) {
+    case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
+        mContent = Kind::ElementArray;
+        if (!mCache) {
+            mCache.reset(new WebGLElementArrayCache);
+        }
+        break;
+
+    case LOCAL_GL_ARRAY_BUFFER:
+    case LOCAL_GL_PIXEL_PACK_BUFFER:
+    case LOCAL_GL_PIXEL_UNPACK_BUFFER:
+    case LOCAL_GL_UNIFORM_BUFFER:
+    case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+    case LOCAL_GL_COPY_READ_BUFFER:
+    case LOCAL_GL_COPY_WRITE_BUFFER:
+        mContent = Kind::OtherData;
+        break;
+
+    default:
+        MOZ_CRASH("GFX: invalid target");
+    }
+}
+
+void
+WebGLBuffer::Delete()
+{
+    mContext->MakeContextCurrent();
+    mContext->gl->fDeleteBuffers(1, &mGLName);
+    mByteLength = 0;
+    mCache = nullptr;
+    LinkedListElement<WebGLBuffer>::remove(); // remove from mContext->mBuffers
+}
+
+////////////////////////////////////////
+
+static bool
+ValidateBufferUsageEnum(WebGLContext* webgl, const char* funcName, GLenum usage)
+{
+    switch (usage) {
+    case LOCAL_GL_STREAM_DRAW:
+    case LOCAL_GL_STATIC_DRAW:
+    case LOCAL_GL_DYNAMIC_DRAW:
+        return true;
+
+    case LOCAL_GL_DYNAMIC_COPY:
+    case LOCAL_GL_DYNAMIC_READ:
+    case LOCAL_GL_STATIC_COPY:
+    case LOCAL_GL_STATIC_READ:
+    case LOCAL_GL_STREAM_COPY:
+    case LOCAL_GL_STREAM_READ:
+        if (MOZ_LIKELY(webgl->IsWebGL2()))
+            return true;
+        break;
+
+    default:
+        break;
+    }
+
+    webgl->ErrorInvalidEnum("%s: Invalid `usage`: 0x%04x", funcName, usage);
+    return false;
+}
+
+void
+WebGLBuffer::BufferData(GLenum target, size_t size, const void* data, GLenum usage)
+{
+    const char funcName[] = "bufferData";
+
+    // Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
+    // is like intptr_t.
+    if (!CheckedInt<GLsizeiptr>(size).isValid())
+        return mContext->ErrorOutOfMemory("%s: bad size", funcName);
+
+    if (!ValidateBufferUsageEnum(mContext, funcName, usage))
+        return;
+
+    const auto& gl = mContext->gl;
+    gl->MakeCurrent();
+    const ScopedLazyBind lazyBind(gl, target, this);
+    mContext->InvalidateBufferFetching();
+
+#ifdef XP_MACOSX
+    // bug 790879
+    if (gl->WorkAroundDriverBugs() &&
+        size > INT32_MAX)
+    {
+        mContext->ErrorOutOfMemory("%s: Allocation size too large.", funcName);
+        return;
+    }
+#endif
+
+    const bool sizeChanges = (size != ByteLength());
+    if (sizeChanges) {
+        gl::GLContext::LocalErrorScope errorScope(*gl);
+        gl->fBufferData(target, size, data, usage);
+        const auto error = errorScope.GetError();
+
+        if (error) {
+            MOZ_ASSERT(error == LOCAL_GL_OUT_OF_MEMORY);
+            mContext->ErrorOutOfMemory("%s: Error from driver: 0x%04x", funcName, error);
+            return;
+        }
+    } else {
+        gl->fBufferData(target, size, data, usage);
+    }
+
+    mUsage = usage;
+    mByteLength = size;
+
+    // Warning: Possibly shared memory.  See bug 1225033.
+    if (!ElementArrayCacheBufferData(data, size)) {
+        mByteLength = 0;
+        mContext->ErrorOutOfMemory("%s: Failed update index buffer cache.", funcName);
+    }
+}
+
+bool
+WebGLBuffer::ValidateRange(const char* funcName, size_t byteOffset, size_t byteLen) const
+{
+    auto availLength = mByteLength;
+    if (byteOffset > availLength) {
+        mContext->ErrorInvalidValue("%s: Offset passes the end of the buffer.", funcName);
+        return false;
+    }
+    availLength -= byteOffset;
+
+    if (byteLen > availLength) {
+        mContext->ErrorInvalidValue("%s: Offset+size passes the end of the buffer.",
+                                    funcName);
+        return false;
+    }
+
+    return true;
+}
+
+////////////////////////////////////////
+
+bool
+WebGLBuffer::ElementArrayCacheBufferData(const void* ptr,
+                                         size_t bufferSizeInBytes)
+{
+    if (mContext->IsWebGL2())
+        return true;
+
+    if (mContent == Kind::ElementArray)
+        return mCache->BufferData(ptr, bufferSizeInBytes);
+
+    return true;
+}
+
+void
+WebGLBuffer::ElementArrayCacheBufferSubData(size_t pos, const void* ptr,
+                                            size_t updateSizeInBytes)
+{
+    if (mContext->IsWebGL2())
+        return;
+
+    if (mContent == Kind::ElementArray)
+        mCache->BufferSubData(pos, ptr, updateSizeInBytes);
+}
+
+size_t
+WebGLBuffer::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const
+{
+    size_t sizeOfCache = mCache ? mCache->SizeOfIncludingThis(mallocSizeOf)
+                                : 0;
+    return mallocSizeOf(this) + sizeOfCache;
+}
+
+bool
+WebGLBuffer::Validate(GLenum type, uint32_t maxAllowed, size_t first, size_t count) const
+{
+    if (mContext->IsWebGL2())
+        return true;
+
+    return mCache->Validate(type, maxAllowed, first, count);
+}
+
+bool
+WebGLBuffer::IsElementArrayUsedWithMultipleTypes() const
+{
+    if (mContext->IsWebGL2())
+        return false;
+
+    return mCache->BeenUsedWithMultipleTypes();
+}
+
+////
+
+bool
+WebGLBuffer::ValidateCanBindToTarget(const char* funcName, GLenum target)
+{
+    /* https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.1
+     *
+     * In the WebGL 2 API, buffers have their WebGL buffer type
+     * initially set to undefined. Calling bindBuffer, bindBufferRange
+     * or bindBufferBase with the target argument set to any buffer
+     * binding point except COPY_READ_BUFFER or COPY_WRITE_BUFFER will
+     * then set the WebGL buffer type of the buffer being bound
+     * according to the table above.
+     *
+     * Any call to one of these functions which attempts to bind a
+     * WebGLBuffer that has the element array WebGL buffer type to a
+     * binding point that falls under other data, or bind a
+     * WebGLBuffer which has the other data WebGL buffer type to
+     * ELEMENT_ARRAY_BUFFER will generate an INVALID_OPERATION error,
+     * and the state of the binding point will remain untouched.
+     */
+
+    if (mContent == WebGLBuffer::Kind::Undefined)
+        return true;
+
+    switch (target) {
+    case LOCAL_GL_COPY_READ_BUFFER:
+    case LOCAL_GL_COPY_WRITE_BUFFER:
+        return true;
+
+    case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
+        if (mContent == WebGLBuffer::Kind::ElementArray)
+            return true;
+        break;
+
+    case LOCAL_GL_ARRAY_BUFFER:
+    case LOCAL_GL_PIXEL_PACK_BUFFER:
+    case LOCAL_GL_PIXEL_UNPACK_BUFFER:
+    case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+    case LOCAL_GL_UNIFORM_BUFFER:
+        if (mContent == WebGLBuffer::Kind::OtherData)
+            return true;
+        break;
+
+    default:
+        MOZ_CRASH();
+    }
+
+    const auto dataType = (mContent == WebGLBuffer::Kind::OtherData) ? "other"
+                                                                     : "element";
+    mContext->ErrorInvalidOperation("%s: Buffer already contains %s data.", funcName,
+                                    dataType);
+    return false;
+}
+
+JSObject*
+WebGLBuffer::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
+{
+    return dom::WebGLBufferBinding::Wrap(cx, this, givenProto);
+}
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLBuffer)
+
+NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLBuffer, AddRef)
+NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLBuffer, Release)
+
+} // namespace mozilla