Add m-esr52 at 52.6.0

1 files changed, 531 insertions, 0 deletions

diff --git a/dom/canvas/WebGLContextBuffers.cpp b/dom/canvas/WebGLContextBuffers.cpp
new file mode 100644
index 0000000000..af506c01c1
--- /dev/null
+++ b/dom/canvas/WebGLContextBuffers.cpp
@@ -0,0 +1,531 @@
+/* -*- 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 "WebGLContext.h"
+
+#include "GLContext.h"
+#include "WebGLBuffer.h"
+#include "WebGLVertexArray.h"
+
+namespace mozilla {
+
+WebGLRefPtr<WebGLBuffer>*
+WebGLContext::ValidateBufferSlot(const char* funcName, GLenum target)
+{
+    WebGLRefPtr<WebGLBuffer>* slot = nullptr;
+
+    switch (target) {
+    case LOCAL_GL_ARRAY_BUFFER:
+        slot = &mBoundArrayBuffer;
+        break;
+
+    case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
+        slot = &(mBoundVertexArray->mElementArrayBuffer);
+        break;
+    }
+
+    if (IsWebGL2()) {
+        switch (target) {
+        case LOCAL_GL_COPY_READ_BUFFER:
+            slot = &mBoundCopyReadBuffer;
+            break;
+
+        case LOCAL_GL_COPY_WRITE_BUFFER:
+            slot = &mBoundCopyWriteBuffer;
+            break;
+
+        case LOCAL_GL_PIXEL_PACK_BUFFER:
+            slot = &mBoundPixelPackBuffer;
+            break;
+
+        case LOCAL_GL_PIXEL_UNPACK_BUFFER:
+            slot = &mBoundPixelUnpackBuffer;
+            break;
+
+        case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+            slot = &(mBoundTransformFeedback->mGenericBufferBinding);
+            break;
+
+        case LOCAL_GL_UNIFORM_BUFFER:
+            slot = &mBoundUniformBuffer;
+            break;
+        }
+    }
+
+    if (!slot) {
+        ErrorInvalidEnum("%s: Bad `target`: 0x%04x", funcName, target);
+        return nullptr;
+    }
+
+    return slot;
+}
+
+WebGLBuffer*
+WebGLContext::ValidateBufferSelection(const char* funcName, GLenum target)
+{
+    const auto& slot = ValidateBufferSlot(funcName, target);
+    if (!slot)
+        return nullptr;
+    const auto& buffer = *slot;
+
+    if (!buffer) {
+        ErrorInvalidOperation("%s: Buffer for `target` is null.", funcName);
+        return nullptr;
+    }
+
+    if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER) {
+        if (mBoundTransformFeedback->IsActiveAndNotPaused()) {
+            ErrorInvalidOperation("%s: Cannot select TRANSFORM_FEEDBACK_BUFFER when"
+                                  " transform feedback is active and unpaused.",
+                                  funcName);
+            return nullptr;
+        }
+        if (buffer->IsBoundForNonTF()) {
+            ErrorInvalidOperation("%s: Specified WebGLBuffer is currently bound for"
+                                  " non-transform-feedback.",
+                                  funcName);
+            return nullptr;
+        }
+    } else {
+        if (buffer->IsBoundForTF()) {
+            ErrorInvalidOperation("%s: Specified WebGLBuffer is currently bound for"
+                                  " transform feedback.",
+                                  funcName);
+            return nullptr;
+        }
+    }
+
+    return buffer.get();
+}
+
+IndexedBufferBinding*
+WebGLContext::ValidateIndexedBufferSlot(const char* funcName, GLenum target, GLuint index)
+{
+    decltype(mIndexedUniformBufferBindings)* bindings;
+    const char* maxIndexEnum;
+    switch (target) {
+    case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+        bindings = &(mBoundTransformFeedback->mIndexedBindings);
+        maxIndexEnum = "MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS";
+        break;
+
+    case LOCAL_GL_UNIFORM_BUFFER:
+        bindings = &mIndexedUniformBufferBindings;
+        maxIndexEnum = "MAX_UNIFORM_BUFFER_BINDINGS";
+        break;
+
+    default:
+        ErrorInvalidEnum("%s: Bad `target`: 0x%04x", funcName, target);
+        return nullptr;
+    }
+
+    if (index >= bindings->size()) {
+        ErrorInvalidValue("%s: `index` >= %s.", funcName, maxIndexEnum);
+        return nullptr;
+    }
+
+    return &(*bindings)[index];
+}
+
+////////////////////////////////////////
+
+void
+WebGLContext::BindBuffer(GLenum target, WebGLBuffer* buffer)
+{
+    const char funcName[] = "bindBuffer";
+    if (IsContextLost())
+        return;
+
+    if (buffer && !ValidateObject(funcName, *buffer))
+        return;
+
+    const auto& slot = ValidateBufferSlot(funcName, target);
+    if (!slot)
+        return;
+
+    if (buffer && !buffer->ValidateCanBindToTarget(funcName, target))
+        return;
+
+    gl->MakeCurrent();
+    gl->fBindBuffer(target, buffer ? buffer->mGLName : 0);
+
+    WebGLBuffer::SetSlot(target, buffer, slot);
+    if (buffer) {
+        buffer->SetContentAfterBind(target);
+    }
+
+    switch (target) {
+    case LOCAL_GL_PIXEL_PACK_BUFFER:
+    case LOCAL_GL_PIXEL_UNPACK_BUFFER:
+        gl->fBindBuffer(target, 0);
+        break;
+    }
+}
+
+////////////////////////////////////////
+
+bool
+WebGLContext::ValidateIndexedBufferBinding(const char* funcName, GLenum target,
+                                           GLuint index,
+                                           WebGLRefPtr<WebGLBuffer>** const out_genericBinding,
+                                           IndexedBufferBinding** const out_indexedBinding)
+{
+    *out_genericBinding = ValidateBufferSlot(funcName, target);
+    if (!*out_genericBinding)
+        return false;
+
+    *out_indexedBinding = ValidateIndexedBufferSlot(funcName, target, index);
+    if (!*out_indexedBinding)
+        return false;
+
+    if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER &&
+        mBoundTransformFeedback->mIsActive)
+    {
+        ErrorInvalidOperation("%s: Cannot update indexed buffer bindings on active"
+                              " transform feedback objects.",
+                              funcName);
+        return false;
+    }
+
+    return true;
+}
+
+void
+WebGLContext::BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buffer)
+{
+    const char funcName[] = "bindBufferBase";
+    if (IsContextLost())
+        return;
+
+    if (buffer && !ValidateObject(funcName, *buffer))
+        return;
+
+    WebGLRefPtr<WebGLBuffer>* genericBinding;
+    IndexedBufferBinding* indexedBinding;
+    if (!ValidateIndexedBufferBinding(funcName, target, index, &genericBinding,
+                                      &indexedBinding))
+    {
+        return;
+    }
+
+    if (buffer && !buffer->ValidateCanBindToTarget(funcName, target))
+        return;
+
+    ////
+
+    gl->MakeCurrent();
+    gl->fBindBufferBase(target, index, buffer ? buffer->mGLName : 0);
+
+    ////
+
+    WebGLBuffer::SetSlot(target, buffer, genericBinding);
+    WebGLBuffer::SetSlot(target, buffer, &indexedBinding->mBufferBinding);
+    indexedBinding->mRangeStart = 0;
+    indexedBinding->mRangeSize = 0;
+
+    if (buffer) {
+        buffer->SetContentAfterBind(target);
+    }
+}
+
+void
+WebGLContext::BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
+                              WebGLintptr offset, WebGLsizeiptr size)
+{
+    const char funcName[] = "bindBufferRange";
+    if (IsContextLost())
+        return;
+
+    if (buffer && !ValidateObject(funcName, *buffer))
+        return;
+
+    if (!ValidateNonNegative(funcName, "offset", offset) ||
+        !ValidateNonNegative(funcName, "size", size))
+    {
+        return;
+    }
+
+    WebGLRefPtr<WebGLBuffer>* genericBinding;
+    IndexedBufferBinding* indexedBinding;
+    if (!ValidateIndexedBufferBinding(funcName, target, index, &genericBinding,
+                                      &indexedBinding))
+    {
+        return;
+    }
+
+    if (buffer && !buffer->ValidateCanBindToTarget(funcName, target))
+        return;
+
+    if (buffer && !size) {
+        ErrorInvalidValue("%s: size must be non-zero for non-null buffer.", funcName);
+        return;
+    }
+
+    ////
+
+    gl->MakeCurrent();
+
+    switch (target) {
+    case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
+        if (offset % 4 != 0 || size % 4 != 0) {
+            ErrorInvalidValue("%s: For %s, `offset` and `size` must be multiples of 4.",
+                              funcName, "TRANSFORM_FEEDBACK_BUFFER");
+            return;
+        }
+        break;
+
+    case LOCAL_GL_UNIFORM_BUFFER:
+        {
+            GLuint offsetAlignment = 0;
+            gl->GetUIntegerv(LOCAL_GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &offsetAlignment);
+            if (offset % offsetAlignment != 0) {
+                ErrorInvalidValue("%s: For %s, `offset` must be a multiple of %s.",
+                                  funcName, "UNIFORM_BUFFER",
+                                  "UNIFORM_BUFFER_OFFSET_ALIGNMENT");
+                return;
+            }
+        }
+        break;
+    }
+
+    ////
+
+#ifdef XP_MACOSX
+    if (buffer && buffer->Content() == WebGLBuffer::Kind::Undefined &&
+        gl->WorkAroundDriverBugs())
+    {
+        // BindBufferRange will fail if the buffer's contents is undefined.
+        // Bind so driver initializes the buffer.
+        gl->fBindBuffer(target, buffer->mGLName);
+    }
+#endif
+
+    gl->fBindBufferRange(target, index, buffer ? buffer->mGLName : 0, offset, size);
+
+    ////
+
+    WebGLBuffer::SetSlot(target, buffer, genericBinding);
+    WebGLBuffer::SetSlot(target, buffer, &indexedBinding->mBufferBinding);
+    indexedBinding->mRangeStart = offset;
+    indexedBinding->mRangeSize = size;
+
+    if (buffer) {
+        buffer->SetContentAfterBind(target);
+    }
+}
+
+////////////////////////////////////////
+
+void
+WebGLContext::BufferDataImpl(GLenum target, size_t dataLen, const uint8_t* data,
+                             GLenum usage)
+{
+    const char funcName[] = "bufferData";
+
+    const auto& buffer = ValidateBufferSelection(funcName, target);
+    if (!buffer)
+        return;
+
+    buffer->BufferData(target, dataLen, data, usage);
+}
+
+////
+
+void
+WebGLContext::BufferData(GLenum target, WebGLsizeiptr size, GLenum usage)
+{
+    const char funcName[] = "bufferData";
+    if (IsContextLost())
+        return;
+
+    if (!ValidateNonNegative(funcName, "size", size))
+        return;
+
+    ////
+
+    const UniqueBuffer zeroBuffer(calloc(size, 1));
+    if (!zeroBuffer)
+        return ErrorOutOfMemory("%s: Failed to allocate zeros.", funcName);
+
+    BufferDataImpl(target, size_t(size), (const uint8_t*)zeroBuffer.get(), usage);
+}
+
+void
+WebGLContext::BufferData(GLenum target, const dom::Nullable<dom::ArrayBuffer>& maybeSrc,
+                         GLenum usage)
+{
+    if (IsContextLost())
+        return;
+
+    if (!ValidateNonNull("bufferData", maybeSrc))
+        return;
+    const auto& src = maybeSrc.Value();
+
+    src.ComputeLengthAndData();
+    BufferDataImpl(target, src.LengthAllowShared(), src.DataAllowShared(), usage);
+}
+
+void
+WebGLContext::BufferData(GLenum target, const dom::ArrayBufferView& src, GLenum usage,
+                         GLuint srcElemOffset, GLuint srcElemCountOverride)
+{
+    const char funcName[] = "bufferData";
+    if (IsContextLost())
+        return;
+
+    uint8_t* bytes;
+    size_t byteLen;
+    if (!ValidateArrayBufferView(funcName, src, srcElemOffset, srcElemCountOverride,
+                                 &bytes, &byteLen))
+    {
+        return;
+    }
+
+    BufferDataImpl(target, byteLen, bytes, usage);
+}
+
+////////////////////////////////////////
+
+void
+WebGLContext::BufferSubDataImpl(GLenum target, WebGLsizeiptr dstByteOffset,
+                                size_t dataLen, const uint8_t* data)
+{
+    const char funcName[] = "bufferSubData";
+
+    if (!ValidateNonNegative(funcName, "byteOffset", dstByteOffset))
+        return;
+
+    const auto& buffer = ValidateBufferSelection(funcName, target);
+    if (!buffer)
+        return;
+
+    if (!buffer->ValidateRange(funcName, dstByteOffset, dataLen))
+        return;
+
+    if (!CheckedInt<GLintptr>(dataLen).isValid()) {
+        ErrorOutOfMemory("%s: Size too large.", funcName);
+        return;
+    }
+    const GLintptr glDataLen(dataLen);
+
+    ////
+
+    MakeContextCurrent();
+    const ScopedLazyBind lazyBind(gl, target, buffer);
+
+    // Warning: Possibly shared memory.  See bug 1225033.
+    gl->fBufferSubData(target, dstByteOffset, glDataLen, data);
+
+    // Warning: Possibly shared memory.  See bug 1225033.
+    buffer->ElementArrayCacheBufferSubData(dstByteOffset, data, size_t(glDataLen));
+}
+
+void
+WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr dstByteOffset,
+                            const dom::ArrayBuffer& src)
+{
+    if (IsContextLost())
+        return;
+
+    src.ComputeLengthAndData();
+    BufferSubDataImpl(target, dstByteOffset, src.LengthAllowShared(),
+                      src.DataAllowShared());
+}
+
+void
+WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr dstByteOffset,
+                            const dom::ArrayBufferView& src, GLuint srcElemOffset,
+                            GLuint srcElemCountOverride)
+{
+    const char funcName[] = "bufferSubData";
+    if (IsContextLost())
+        return;
+
+    uint8_t* bytes;
+    size_t byteLen;
+    if (!ValidateArrayBufferView(funcName, src, srcElemOffset, srcElemCountOverride,
+                                 &bytes, &byteLen))
+    {
+        return;
+    }
+
+    BufferSubDataImpl(target, dstByteOffset, byteLen, bytes);
+}
+
+////////////////////////////////////////
+
+already_AddRefed<WebGLBuffer>
+WebGLContext::CreateBuffer()
+{
+    if (IsContextLost())
+        return nullptr;
+
+    GLuint buf = 0;
+    MakeContextCurrent();
+    gl->fGenBuffers(1, &buf);
+
+    RefPtr<WebGLBuffer> globj = new WebGLBuffer(this, buf);
+    return globj.forget();
+}
+
+void
+WebGLContext::DeleteBuffer(WebGLBuffer* buffer)
+{
+    if (!ValidateDeleteObject("deleteBuffer", buffer))
+        return;
+
+    ////
+
+    const auto fnClearIfBuffer = [&](GLenum target, WebGLRefPtr<WebGLBuffer>& bindPoint) {
+        if (bindPoint == buffer) {
+            WebGLBuffer::SetSlot(target, nullptr, &bindPoint);
+        }
+    };
+
+    fnClearIfBuffer(0, mBoundArrayBuffer);
+    fnClearIfBuffer(0, mBoundVertexArray->mElementArrayBuffer);
+
+    for (auto& cur : mBoundVertexArray->mAttribs) {
+        fnClearIfBuffer(0, cur.mBuf);
+    }
+
+    // WebGL binding points
+    if (IsWebGL2()) {
+        fnClearIfBuffer(0, mBoundCopyReadBuffer);
+        fnClearIfBuffer(0, mBoundCopyWriteBuffer);
+        fnClearIfBuffer(0, mBoundPixelPackBuffer);
+        fnClearIfBuffer(0, mBoundPixelUnpackBuffer);
+        fnClearIfBuffer(0, mBoundUniformBuffer);
+        fnClearIfBuffer(LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER,
+                        mBoundTransformFeedback->mGenericBufferBinding);
+
+        if (!mBoundTransformFeedback->mIsActive) {
+            for (auto& binding : mBoundTransformFeedback->mIndexedBindings) {
+                fnClearIfBuffer(LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER,
+                                binding.mBufferBinding);
+            }
+        }
+
+        for (auto& binding : mIndexedUniformBufferBindings) {
+            fnClearIfBuffer(0, binding.mBufferBinding);
+        }
+    }
+
+    ////
+
+    buffer->RequestDelete();
+}
+
+bool
+WebGLContext::IsBuffer(WebGLBuffer* buffer)
+{
+    if (!ValidateIsObject("isBuffer", buffer))
+        return false;
+
+    MakeContextCurrent();
+    return gl->fIsBuffer(buffer->mGLName);
+}
+
+} // namespace mozilla