The Tor Browser: content/canvas/src/WebGLContextBuffers.cpp@6474c204b198 (annotated)

content/canvas/src/WebGLContextBuffers.cpp@6474c204b198 (annotated)

content/canvas/src/WebGLContextBuffers.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- 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"
 using namespace mozilla;
 using namespace mozilla::dom;
 void
 WebGLContext::BindBuffer(GLenum target, WebGLBuffer *buffer)
 {
     if (IsContextLost())
         return;
     if (!ValidateObjectAllowDeletedOrNull("bindBuffer", buffer))
         return;
     // silently ignore a deleted buffer
     if (buffer && buffer->IsDeleted())
         return;
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bindBuffer");
     if (!bufferSlot) {
         return;
     }
     if (buffer) {
         if (!buffer->Target()) {
             buffer->SetTarget(target);
             buffer->SetHasEverBeenBound(true);
         } else if (target != buffer->Target()) {
             return ErrorInvalidOperation("bindBuffer: buffer already bound to a different target");
         }
     }
     *bufferSlot = buffer;
     MakeContextCurrent();
     gl->fBindBuffer(target, buffer ? buffer->GLName() : 0);
 }
 void
 WebGLContext::BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buffer)
 {
     if (IsContextLost())
         return;
     if (!ValidateObjectAllowDeletedOrNull("bindBufferBase", buffer))
         return;
     // silently ignore a deleted buffer
     if (buffer && buffer->IsDeleted()) {
         return;
     }
     WebGLRefPtr<WebGLBuffer>* indexedBufferSlot = GetBufferSlotByTargetIndexed(target, index, "bindBufferBase");
     if (!indexedBufferSlot) {
         return;
     }
     if (buffer) {
         if (!buffer->Target()) {
             buffer->SetTarget(target);
             buffer->SetHasEverBeenBound(true);
         } else if (target != buffer->Target()) {
             return ErrorInvalidOperation("bindBuffer: buffer already bound to a different target");
         }
     }
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bindBuffer");
     MOZ_ASSERT(bufferSlot, "GetBufferSlotByTarget(Indexed) mismatch");
     *indexedBufferSlot = buffer;
     *bufferSlot = buffer;
     MakeContextCurrent();
     gl->fBindBufferBase(target, index, buffer ? buffer->GLName() : 0);
 }
 void
 WebGLContext::BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
                               WebGLintptr offset, WebGLsizeiptr size)
 {
     if (IsContextLost())
         return;
     if (!ValidateObjectAllowDeletedOrNull("bindBufferRange", buffer))
         return;
     // silently ignore a deleted buffer
     if (buffer && buffer->IsDeleted())
         return;
     WebGLRefPtr<WebGLBuffer>* indexedBufferSlot = GetBufferSlotByTargetIndexed(target, index, "bindBufferBase");
     if (!indexedBufferSlot) {
         return;
     }
     if (buffer) {
         if (!buffer->Target()) {
             buffer->SetTarget(target);
             buffer->SetHasEverBeenBound(true);
         } else if (target != buffer->Target()) {
             return ErrorInvalidOperation("bindBuffer: buffer already bound to a different target");
         }
         CheckedInt<WebGLsizeiptr> checked_neededByteLength = CheckedInt<WebGLsizeiptr>(offset) + size;
         if (!checked_neededByteLength.isValid() ||
             checked_neededByteLength.value() > buffer->ByteLength())
         {
             return ErrorInvalidValue("bindBufferRange: invalid range");
         }
     }
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bindBuffer");
     MOZ_ASSERT(bufferSlot, "GetBufferSlotByTarget(Indexed) mismatch");
     *indexedBufferSlot = buffer;
     *bufferSlot = buffer;
     MakeContextCurrent();
     gl->fBindBufferRange(target, index, buffer ? buffer->GLName() : 0, offset, size);
 }
 void
 WebGLContext::BufferData(GLenum target, WebGLsizeiptr size,
                          GLenum usage)
 {
     if (IsContextLost())
         return;
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferData");
     if (!bufferSlot) {
         return;
     }
     if (size < 0)
         return ErrorInvalidValue("bufferData: negative size");
     if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
         return;
     // careful: WebGLsizeiptr is always 64-bit, but GLsizeiptr is like intptr_t.
     if (!CheckedInt<GLsizeiptr>(size).isValid())
         return ErrorOutOfMemory("bufferData: bad size");
     WebGLBuffer* boundBuffer = bufferSlot->get();
     if (!boundBuffer)
         return ErrorInvalidOperation("bufferData: no buffer bound!");
     void* zeroBuffer = calloc(size, 1);
     if (!zeroBuffer)
         return ErrorOutOfMemory("bufferData: out of memory");
     MakeContextCurrent();
     InvalidateBufferFetching();
     GLenum error = CheckedBufferData(target, size, zeroBuffer, usage);
     free(zeroBuffer);
     if (error) {
         GenerateWarning("bufferData generated error %s", ErrorName(error));
         return;
     }
     boundBuffer->SetByteLength(size);
     if (!boundBuffer->ElementArrayCacheBufferData(nullptr, size)) {
         return ErrorOutOfMemory("bufferData: out of memory");
     }
 }
 void
 WebGLContext::BufferData(GLenum target,
                          const Nullable<ArrayBuffer> &maybeData,
                          GLenum usage)
 {
     if (IsContextLost())
         return;
     if (maybeData.IsNull()) {
         // see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
         return ErrorInvalidValue("bufferData: null object passed");
     }
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferData");
     if (!bufferSlot) {
         return;
     }
     const ArrayBuffer& data = maybeData.Value();
     data.ComputeLengthAndData();
     // Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
     // is like intptr_t.
     if (!CheckedInt<GLsizeiptr>(data.Length()).isValid())
         return ErrorOutOfMemory("bufferData: bad size");
     if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
         return;
     WebGLBuffer* boundBuffer = bufferSlot->get();
     if (!boundBuffer)
         return ErrorInvalidOperation("bufferData: no buffer bound!");
     MakeContextCurrent();
     InvalidateBufferFetching();
     GLenum error = CheckedBufferData(target, data.Length(), data.Data(), usage);
     if (error) {
         GenerateWarning("bufferData generated error %s", ErrorName(error));
         return;
     }
     boundBuffer->SetByteLength(data.Length());
     if (!boundBuffer->ElementArrayCacheBufferData(data.Data(), data.Length())) {
         return ErrorOutOfMemory("bufferData: out of memory");
     }
 }
 void
 WebGLContext::BufferData(GLenum target, const ArrayBufferView& data,
                          GLenum usage)
 {
     if (IsContextLost())
         return;
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferSubData");
     if (!bufferSlot) {
         return;
     }
     if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
         return;
     WebGLBuffer* boundBuffer = bufferSlot->get();
     if (!boundBuffer)
         return ErrorInvalidOperation("bufferData: no buffer bound!");
     data.ComputeLengthAndData();
     // Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
     // is like intptr_t.
     if (!CheckedInt<GLsizeiptr>(data.Length()).isValid())
         return ErrorOutOfMemory("bufferData: bad size");
     InvalidateBufferFetching();
     MakeContextCurrent();
     GLenum error = CheckedBufferData(target, data.Length(), data.Data(), usage);
     if (error) {
         GenerateWarning("bufferData generated error %s", ErrorName(error));
         return;
     }
     boundBuffer->SetByteLength(data.Length());
     if (!boundBuffer->ElementArrayCacheBufferData(data.Data(), data.Length())) {
         return ErrorOutOfMemory("bufferData: out of memory");
     }
 }
 void
 WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
                             const Nullable<ArrayBuffer> &maybeData)
 {
     if (IsContextLost())
         return;
     if (maybeData.IsNull()) {
         // see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
         return;
     }
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferSubData");
     if (!bufferSlot) {
         return;
     }
     if (byteOffset < 0)
         return ErrorInvalidValue("bufferSubData: negative offset");
     WebGLBuffer* boundBuffer = bufferSlot->get();
     if (!boundBuffer)
         return ErrorInvalidOperation("bufferData: no buffer bound!");
     const ArrayBuffer& data = maybeData.Value();
     data.ComputeLengthAndData();
     CheckedInt<WebGLsizeiptr> checked_neededByteLength = CheckedInt<WebGLsizeiptr>(byteOffset) + data.Length();
     if (!checked_neededByteLength.isValid())
         return ErrorInvalidValue("bufferSubData: integer overflow computing the needed byte length");
     if (checked_neededByteLength.value() > boundBuffer->ByteLength())
         return ErrorInvalidValue("bufferSubData: not enough data - operation requires %d bytes, but buffer only has %d bytes",
                                  checked_neededByteLength.value(), boundBuffer->ByteLength());
     MakeContextCurrent();
     boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.Data(), data.Length());
     gl->fBufferSubData(target, byteOffset, data.Length(), data.Data());
 }
 void
 WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
                             const ArrayBufferView& data)
 {
     if (IsContextLost())
         return;
     WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferSubData");
     if (!bufferSlot) {
         return;
     }
     if (byteOffset < 0)
         return ErrorInvalidValue("bufferSubData: negative offset");
     WebGLBuffer* boundBuffer = bufferSlot->get();
     if (!boundBuffer)
         return ErrorInvalidOperation("bufferSubData: no buffer bound!");
     data.ComputeLengthAndData();
     CheckedInt<WebGLsizeiptr> checked_neededByteLength = CheckedInt<WebGLsizeiptr>(byteOffset) + data.Length();
     if (!checked_neededByteLength.isValid())
         return ErrorInvalidValue("bufferSubData: integer overflow computing the needed byte length");
     if (checked_neededByteLength.value() > boundBuffer->ByteLength())
         return ErrorInvalidValue("bufferSubData: not enough data -- operation requires %d bytes, but buffer only has %d bytes",
                                  checked_neededByteLength.value(), boundBuffer->ByteLength());
     boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.Data(), data.Length());
     MakeContextCurrent();
     gl->fBufferSubData(target, byteOffset, data.Length(), data.Data());
 }
 already_AddRefed<WebGLBuffer>
 WebGLContext::CreateBuffer()
 {
     if (IsContextLost())
         return nullptr;
     nsRefPtr<WebGLBuffer> globj = new WebGLBuffer(this);
     return globj.forget();
 }
 void
 WebGLContext::DeleteBuffer(WebGLBuffer *buffer)
 {
     if (IsContextLost())
         return;
     if (!ValidateObjectAllowDeletedOrNull("deleteBuffer", buffer))
         return;
     if (!buffer || buffer->IsDeleted())
         return;
     if (mBoundArrayBuffer == buffer) {
         BindBuffer(LOCAL_GL_ARRAY_BUFFER,
                    static_cast<WebGLBuffer*>(nullptr));
     }
     if (mBoundVertexArray->mBoundElementArrayBuffer == buffer) {
         BindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER,
                    static_cast<WebGLBuffer*>(nullptr));
     }
     for (int32_t i = 0; i < mGLMaxVertexAttribs; i++) {
         if (mBoundVertexArray->HasAttrib(i) && mBoundVertexArray->mAttribs[i].buf == buffer)
             mBoundVertexArray->mAttribs[i].buf = nullptr;
     }
     buffer->RequestDelete();
 }
 bool
 WebGLContext::IsBuffer(WebGLBuffer *buffer)
 {
     if (IsContextLost())
         return false;
     return ValidateObjectAllowDeleted("isBuffer", buffer) &&
            !buffer->IsDeleted() &&
            buffer->HasEverBeenBound();
 }
 bool
 WebGLContext::ValidateBufferUsageEnum(GLenum target, const char *infos)
 {
     switch (target) {
         case LOCAL_GL_STREAM_DRAW:
         case LOCAL_GL_STATIC_DRAW:
         case LOCAL_GL_DYNAMIC_DRAW:
             return true;
         default:
             break;
     }
     ErrorInvalidEnumInfo(infos, target);
     return false;
 }
 WebGLRefPtr<WebGLBuffer>*
 WebGLContext::GetBufferSlotByTarget(GLenum target, const char* infos)
 {
     switch (target) {
         case LOCAL_GL_ARRAY_BUFFER:
             return &mBoundArrayBuffer;
         case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
             return &mBoundVertexArray->mBoundElementArrayBuffer;
         case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
             if (!IsWebGL2()) {
                 break;
             }
             return &mBoundTransformFeedbackBuffer;
         default:
             break;
     }
     ErrorInvalidEnum("%s: target: invalid enum value 0x%x", infos, target);
     return nullptr;
 }
 WebGLRefPtr<WebGLBuffer>*
 WebGLContext::GetBufferSlotByTargetIndexed(GLenum target, GLuint index, const char* infos)
 {
     switch (target) {
         case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
             if (index >= mGLMaxTransformFeedbackSeparateAttribs) {
                 ErrorInvalidValue("%s: index should be less than MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS", infos, index);
                 return nullptr;
             }
             return nullptr; // See bug 903594
         default:
             break;
     }
     ErrorInvalidEnum("%s: target: invalid enum value 0x%x", infos, target);
     return nullptr;
 }
 GLenum
 WebGLContext::CheckedBufferData(GLenum target,
                                 GLsizeiptr size,
                                 const GLvoid *data,
                                 GLenum usage)
 {
 #ifdef XP_MACOSX
     // bug 790879
     if (gl->WorkAroundDriverBugs() &&
         int64_t(size) > INT32_MAX) // the cast avoids a potential always-true warning on 32bit
     {
         GenerateWarning("Rejecting valid bufferData call with size %lu to avoid a Mac bug", size);
         return LOCAL_GL_INVALID_VALUE;
     }
 #endif
     WebGLBuffer *boundBuffer = nullptr;
     if (target == LOCAL_GL_ARRAY_BUFFER) {
         boundBuffer = mBoundArrayBuffer;
     } else if (target == LOCAL_GL_ELEMENT_ARRAY_BUFFER) {
         boundBuffer = mBoundVertexArray->mBoundElementArrayBuffer;
     }
     MOZ_ASSERT(boundBuffer != nullptr, "no buffer bound for this target");
     bool sizeChanges = uint32_t(size) != boundBuffer->ByteLength();
     if (sizeChanges) {
         GetAndFlushUnderlyingGLErrors();
         gl->fBufferData(target, size, data, usage);
         GLenum error = GetAndFlushUnderlyingGLErrors();
         return error;
     } else {
         gl->fBufferData(target, size, data, usage);
         return LOCAL_GL_NO_ERROR;
     }
 }

The Tor Browser / annotate

content/canvas/src/WebGLContextBuffers.cpp@6474c204b198 (annotated)

content/canvas/src/WebGLContextBuffers.cpp