bool
WebGLContext::ValidateAttribPointer(bool integerMode, GLuint index, GLint size, GLenum type,
WebGLboolean normalized, GLsizei stride,
WebGLintptr byteOffset, const char* info)
{
WebGLBuffer* buffer = mBoundArrayBuffer;
if (!buffer) {
ErrorInvalidOperation("%s: must have valid GL_ARRAY_BUFFER binding", info);
return false;
}
GLsizei requiredAlignment = 0;
if (!ValidateAttribPointerType(integerMode, type, &requiredAlignment, info))
return false;
// requiredAlignment should always be a power of two
MOZ_ASSERT(IsPowerOfTwo(requiredAlignment));
GLsizei requiredAlignmentMask = requiredAlignment - 1;
if (size < 1 || size > 4) {
ErrorInvalidValue("%s: invalid element size", info);
return false;
}
// see WebGL spec section 6.6 "Vertex Attribute Data Stride"
if (stride < 0 || stride > 255) {
ErrorInvalidValue("%s: negative or too large stride", info);
return false;
}
if (byteOffset < 0) {
ErrorInvalidValue("%s: negative offset", info);
return false;
}
if (stride & requiredAlignmentMask) {
ErrorInvalidOperation("%s: stride doesn't satisfy the alignment "
"requirement of given type", info);
return false;
}
if (byteOffset & requiredAlignmentMask) {
ErrorInvalidOperation("%s: byteOffset doesn't satisfy the alignment "
"requirement of given type", info);
return false;
}
return true;
}
IndexedBufferBinding* WebGLContext::ValidateIndexedBufferSlot(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:
ErrorInvalidEnumInfo("target", target);
return nullptr;
}
if (index >= bindings->size()) {
ErrorInvalidValue("`index` >= %s.", maxIndexEnum);
return nullptr;
}
return &(*bindings)[index];
}
void
WebGLContext::GetParameterIndexed(JSContext* cx, GLenum pname, GLuint index,
JS::MutableHandle<JS::Value> retval)
{
if (IsContextLost()) {
retval.setNull();
return;
}
MakeContextCurrent();
switch (pname) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
{
if (index >= mGLMaxTransformFeedbackSeparateAttribs) {
ErrorInvalidValue("getParameterIndexed: index should be less than MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS", index);
retval.setNull();
return;
}
retval.setNull(); // See bug 903594
return;
}
default:
break;
}
ErrorInvalidEnumInfo("getParameterIndexed: parameter", pname);
retval.setNull();
}
void
WebGL2Context::GetIndexedParameter(JSContext* cx, GLenum target, GLuint index,
JS::MutableHandleValue retval, ErrorResult& out_error)
{
const char funcName[] = "getIndexedParameter";
retval.set(JS::NullValue());
if (IsContextLost())
return;
const std::vector<IndexedBufferBinding>* bindings;
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_START:
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
bindings = &(mBoundTransformFeedback->mIndexedBindings);
break;
case LOCAL_GL_UNIFORM_BUFFER_BINDING:
case LOCAL_GL_UNIFORM_BUFFER_START:
case LOCAL_GL_UNIFORM_BUFFER_SIZE:
bindings = &mIndexedUniformBufferBindings;
break;
default:
ErrorInvalidEnumInfo("getIndexedParameter: target", target);
return;
}
if (index >= bindings->size()) {
ErrorInvalidValue("%s: `index` must be < %s.", funcName,
"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
return;
}
const auto& binding = (*bindings)[index];
JS::Value ret = JS::NullValue();
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
case LOCAL_GL_UNIFORM_BUFFER_BINDING:
if (binding.mBufferBinding) {
ret = WebGLObjectAsJSValue(cx, binding.mBufferBinding.get(), out_error);
}
break;
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_START:
case LOCAL_GL_UNIFORM_BUFFER_START:
ret = JS::NumberValue(binding.mRangeStart);
break;
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
case LOCAL_GL_UNIFORM_BUFFER_SIZE:
ret = JS::NumberValue(binding.mRangeSize);
break;
}
retval.set(ret);
}
void
WebGLContext::BufferSubDataT(GLenum target,
WebGLsizeiptr byteOffset,
const BufferT& data)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(target, "bufferSubData"))
return;
WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
if (byteOffset < 0)
return ErrorInvalidValue("bufferSubData: negative offset");
WebGLBuffer* boundBuffer = bufferSlot.get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
data.ComputeLengthAndData();
CheckedInt<WebGLsizeiptr> checked_neededByteLength =
CheckedInt<WebGLsizeiptr>(byteOffset) + data.Length();
if (!checked_neededByteLength.isValid()) {
ErrorInvalidValue("bufferSubData: Integer overflow computing the needed"
" byte length.");
return;
}
if (checked_neededByteLength.value() > boundBuffer->ByteLength()) {
ErrorInvalidValue("bufferSubData: Not enough data. Operation requires"
" %d bytes, but buffer only has %d bytes.",
checked_neededByteLength.value(),
boundBuffer->ByteLength());
return;
}
boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.Data(),
data.Length());
MakeContextCurrent();
gl->fBufferSubData(target, byteOffset, data.Length(), data.Data());
}
void WebGL2Context::GetBufferSubData(GLenum target, GLintptr offset,
const dom::Nullable<dom::ArrayBuffer>& maybeData)
{
// If returnedData is null then an INVALID_VALUE error is
// generated.
if (maybeData.IsNull())
return ErrorInvalidValue("getBufferSubData: returnedData is null");
const dom::ArrayBuffer& data = maybeData.Value();
GetBufferSubDataT(target, offset, data);
}
bool
WebGL1Context::ValidateUniformMatrixTranspose(bool transpose, const char* info)
{
if (transpose) {
ErrorInvalidValue("%s: transpose must be FALSE as per the "
"OpenGL ES 2.0 spec", info);
return false;
}
return true;
}
void
WebGLContext::BufferData(GLenum target,
const dom::Nullable<dom::ArrayBuffer>& maybeData,
GLenum usage)
{
if (maybeData.IsNull()) {
// see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
return ErrorInvalidValue("bufferData: null object passed");
}
BufferDataT(target, maybeData.Value(), usage);
}
/* This doesn't belong here. It's part of state querying */
void
WebGL2Context::GetIndexedParameter(GLenum target, GLuint index,
dom::Nullable<dom::OwningWebGLBufferOrLongLong>& retval)
{
retval.SetNull();
if (IsContextLost())
return;
GLint64 data = 0;
MakeContextCurrent();
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
if (index >= mGLMaxTransformFeedbackSeparateAttribs)
return ErrorInvalidValue("getIndexedParameter: index should be less than "
"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
retval.SetValue().SetAsWebGLBuffer() =
mBoundTransformFeedbackBuffers[index].get();
return;
case LOCAL_GL_UNIFORM_BUFFER_BINDING:
if (index >= mGLMaxUniformBufferBindings)
return ErrorInvalidValue("getIndexedParameter: index should be than "
"MAX_UNIFORM_BUFFER_BINDINGS");
retval.SetValue().SetAsWebGLBuffer() = mBoundUniformBuffers[index].get();
return;
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_START:
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
case LOCAL_GL_UNIFORM_BUFFER_START:
case LOCAL_GL_UNIFORM_BUFFER_SIZE:
gl->fGetInteger64i_v(target, index, &data);
retval.SetValue().SetAsLongLong() = data;
return;
}
ErrorInvalidEnumInfo("getIndexedParameter: target", target);
}
bool
WebGLContext::ValidateAttribIndex(GLuint index, const char* info)
{
bool valid = (index < MaxVertexAttribs());
if (!valid) {
if (index == GLuint(-1)) {
ErrorInvalidValue("%s: -1 is not a valid `index`. This value"
" probably comes from a getAttribLocation()"
" call, where this return value -1 means"
" that the passed name didn't correspond to"
" an active attribute in the specified"
" program.", info);
} else {
ErrorInvalidValue("%s: `index` must be less than"
" MAX_VERTEX_ATTRIBS.", info);
}
}
return valid;
}
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;
// ValidateBufferTarget
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
if (index >= mGLMaxTransformFeedbackSeparateAttribs)
return ErrorInvalidValue("bindBufferRange: index should be less than "
"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
break;
case LOCAL_GL_UNIFORM_BUFFER:
if (index >= mGLMaxUniformBufferBindings)
return ErrorInvalidValue("bindBufferRange: index should be less than "
"MAX_UNIFORM_BUFFER_BINDINGS");
break;
default:
return ErrorInvalidEnumInfo("bindBufferRange: target", target);
}
if (!ValidateBufferForTarget(target, buffer, "bindBufferRange"))
return;
WebGLContextUnchecked::BindBufferRange(target, index, buffer, offset, size);
UpdateBoundBufferIndexed(target, index, buffer);
}
bool WebGL2Context::ValidateClearBuffer(const char* info, GLenum buffer, GLint drawbuffer, size_t elemCount)
{
size_t requiredElements = -1;
GLint maxDrawbuffer = -1;
switch (buffer) {
case LOCAL_GL_COLOR:
case LOCAL_GL_FRONT:
case LOCAL_GL_BACK:
case LOCAL_GL_LEFT:
case LOCAL_GL_RIGHT:
case LOCAL_GL_FRONT_AND_BACK:
requiredElements = 4;
maxDrawbuffer = mGLMaxDrawBuffers - 1;
break;
case LOCAL_GL_DEPTH:
case LOCAL_GL_STENCIL:
requiredElements = 1;
maxDrawbuffer = 0;
break;
default:
ErrorInvalidEnumInfo(info, buffer);
return false;
}
if (drawbuffer < 0 || drawbuffer > maxDrawbuffer) {
ErrorInvalidValue("%s: invalid drawbuffer %d. This buffer only supports drawbuffer values between 0 and %d",
info, drawbuffer, maxDrawbuffer);
return false;
}
if (elemCount < requiredElements) {
ErrorInvalidValue("%s: Not enough elements. Require %u. Given %u.",
info, requiredElements, elemCount);
return false;
}
return true;
}
bool
WebGLContext::ValidateDataOffsetSize(WebGLintptr offset, WebGLsizeiptr size, WebGLsizeiptr bufferSize, const char* info)
{
if (offset < 0) {
ErrorInvalidValue("%s: offset must be positive", info);
return false;
}
if (size < 0) {
ErrorInvalidValue("%s: size must be positive", info);
return false;
}
// *** Careful *** WebGLsizeiptr is always 64-bits but GLsizeiptr
// is like intptr_t. On some platforms it is 32-bits.
CheckedInt<GLsizeiptr> neededBytes = CheckedInt<GLsizeiptr>(offset) + size;
if (!neededBytes.isValid() || neededBytes.value() > bufferSize) {
ErrorInvalidValue("%s: invalid range", info);
return false;
}
return true;
}
/**
* Check data ranges [readOffset, readOffset + size] and [writeOffset,
* writeOffset + size] for overlap.
*
* It is assumed that offset and size have already been validated with
* ValidateDataOffsetSize().
*/
bool
WebGLContext::ValidateDataRanges(WebGLintptr readOffset, WebGLintptr writeOffset, WebGLsizeiptr size, const char* info)
{
MOZ_ASSERT((CheckedInt<WebGLsizeiptr>(readOffset) + size).isValid());
MOZ_ASSERT((CheckedInt<WebGLsizeiptr>(writeOffset) + size).isValid());
bool separate = (readOffset + size < writeOffset || writeOffset + size < readOffset);
if (!separate) {
ErrorInvalidValue("%s: ranges [readOffset, readOffset + size) and [writeOffset, "
"writeOffset + size) overlap", info);
}
return separate;
}
bool
WebGLContext::ValidateAttribArraySetter(const char* name, uint32_t setterElemSize,
uint32_t arrayLength)
{
if (IsContextLost())
return false;
if (arrayLength < setterElemSize) {
ErrorInvalidValue("%s: Array must have >= %d elements.", name,
setterElemSize);
return false;
}
return true;
}
void
WebGLContext::BufferData(GLenum target, WebGLsizeiptr size, GLenum usage)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(target, "bufferData"))
return;
WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
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!");
UniquePtr<uint8_t> zeroBuffer((uint8_t*)calloc(size, 1));
if (!zeroBuffer)
return ErrorOutOfMemory("bufferData: out of memory");
MakeContextCurrent();
InvalidateBufferFetching();
GLenum error = CheckedBufferData(target, size, zeroBuffer.get(), usage);
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
WebGL2Context::BindSampler(GLuint unit, WebGLSampler* sampler)
{
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull("bindSampler", sampler))
return;
if (GLint(unit) >= mGLMaxTextureUnits)
return ErrorInvalidValue("bindSampler: unit must be < %d", mGLMaxTextureUnits);
if (sampler && sampler->IsDeleted())
return ErrorInvalidOperation("bindSampler: binding deleted sampler");
WebGLContextUnchecked::BindSampler(unit, sampler);
mBoundSamplers[unit] = sampler;
}
void
WebGLContext::Clear(GLbitfield mask)
{
const char funcName[] = "clear";
if (IsContextLost())
return;
MakeContextCurrent();
uint32_t m = mask & (LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT | LOCAL_GL_STENCIL_BUFFER_BIT);
if (mask != m)
return ErrorInvalidValue("%s: invalid mask bits", funcName);
if (mask == 0) {
GenerateWarning("Calling gl.clear(0) has no effect.");
} else if (mRasterizerDiscardEnabled) {
GenerateWarning("Calling gl.clear() with RASTERIZER_DISCARD enabled has no effects.");
}
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments(funcName))
return;
gl->fClear(mask);
return;
} else {
ClearBackbufferIfNeeded();
}
// Ok, we're clearing the default framebuffer/screen.
{
ScopedMaskWorkaround autoMask(*this);
gl->fClear(mask);
}
Invalidate();
mShouldPresent = true;
}
bool
WebGLContext::DrawArrays_check(GLint first, GLsizei count, GLsizei primcount,
const char* info)
{
if (first < 0 || count < 0) {
ErrorInvalidValue("%s: negative first or count", info);
return false;
}
if (primcount < 0) {
ErrorInvalidValue("%s: negative primcount", info);
return false;
}
if (!ValidateStencilParamsForDrawCall()) {
return false;
}
// If count is 0, there's nothing to do.
if (count == 0 || primcount == 0) {
return false;
}
// Any checks below this depend on a program being available.
if (!mCurrentProgram) {
ErrorInvalidOperation("%s: null CURRENT_PROGRAM", info);
return false;
}
if (!ValidateBufferFetching(info)) {
return false;
}
CheckedInt<GLsizei> checked_firstPlusCount = CheckedInt<GLsizei>(first) + count;
if (!checked_firstPlusCount.isValid()) {
ErrorInvalidOperation("%s: overflow in first+count", info);
return false;
}
if (uint32_t(checked_firstPlusCount.value()) > mMaxFetchedVertices) {
ErrorInvalidOperation("%s: bound vertex attribute buffers do not have sufficient size for given first and count", info);
return false;
}
if (uint32_t(primcount) > mMaxFetchedInstances) {
ErrorInvalidOperation("%s: bound instance attribute buffers do not have sufficient size for given primcount", info);
return false;
}
MOZ_ASSERT(gl->IsCurrent());
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments(info))
return false;
} else {
ClearBackbufferIfNeeded();
}
if (!DoFakeVertexAttrib0(checked_firstPlusCount.value())) {
return false;
}
return true;
}
void
WebGL2Context::GetBufferSubDataT(GLenum target, GLintptr offset, const BufferT& data)
{
if (IsContextLost())
return;
// For the WebGLBuffer bound to the passed target, read
// returnedData.byteLength bytes from the buffer starting at byte
// offset offset and write them to returnedData.
// If zero is bound to target, an INVALID_OPERATION error is
// generated.
if (!ValidateBufferTarget(target, "getBufferSubData"))
return;
// If offset is less than zero, an INVALID_VALUE error is
// generated.
if (offset < 0)
return ErrorInvalidValue("getBufferSubData: negative offset");
WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
WebGLBuffer* boundBuffer = bufferSlot.get();
if (!boundBuffer)
return ErrorInvalidOperation("getBufferSubData: no buffer bound");
// If offset + returnedData.byteLength would extend beyond the end
// of the buffer an INVALID_VALUE error is generated.
data.ComputeLengthAndData();
CheckedInt<WebGLsizeiptr> neededByteLength = CheckedInt<WebGLsizeiptr>(offset) + data.LengthAllowShared();
if (!neededByteLength.isValid()) {
ErrorInvalidValue("getBufferSubData: Integer overflow computing the needed"
" byte length.");
return;
}
if (neededByteLength.value() > boundBuffer->ByteLength()) {
ErrorInvalidValue("getBufferSubData: Not enough data. Operation requires"
" %d bytes, but buffer only has %d bytes.",
neededByteLength.value(), boundBuffer->ByteLength());
return;
}
// If target is TRANSFORM_FEEDBACK_BUFFER, and any transform
// feedback object is currently active, an INVALID_OPERATION error
// is generated.
WebGLTransformFeedback* currentTF = mBoundTransformFeedback;
if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER && currentTF) {
if (currentTF->mIsActive)
return ErrorInvalidOperation("getBufferSubData: Currently bound transform"
" feedback is active");
// https://github.com/NVIDIA/WebGL/commit/63aff5e58c1d79825a596f0f4aa46174b9a5f72c
// Performing reads and writes on a buffer that is currently
// bound for transform feedback causes undefined results in
// GLES3.0 and OpenGL 4.5. In practice results of reads and
// writes might be consistent as long as transform feedback
// objects are not active, but neither GLES3.0 nor OpenGL 4.5
// spec guarantees this - just being bound for transform
// feedback is sufficient to cause undefined results.
BindTransformFeedback(LOCAL_GL_TRANSFORM_FEEDBACK, nullptr);
}
/* If the buffer is written and read sequentially by other
* operations and getBufferSubData, it is the responsibility of
* the WebGL API to ensure that data are access
* consistently. This applies even if the buffer is currently
* bound to a transform feedback binding point.
*/
void* ptr = gl->fMapBufferRange(target, offset, data.LengthAllowShared(), LOCAL_GL_MAP_READ_BIT);
// Warning: Possibly shared memory. See bug 1225033.
memcpy(data.DataAllowShared(), ptr, data.LengthAllowShared());
gl->fUnmapBuffer(target);
if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER && currentTF) {
BindTransformFeedback(LOCAL_GL_TRANSFORM_FEEDBACK, currentTF);
}
}
void
WebGLContext::BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
WebGLintptr offset, WebGLsizeiptr size)
{
const char funcName[] = "bindBufferRange";
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull(funcName, buffer))
return;
if (buffer && buffer->IsDeleted())
return ErrorInvalidOperation("%s: Cannot bind a deleted object.", funcName);
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;
////
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);
////
*genericBinding = buffer;
indexedBinding->mBufferBinding = buffer;
indexedBinding->mRangeStart = offset;
indexedBinding->mRangeSize = size;
if (buffer) {
buffer->SetContentAfterBind(target);
}
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
mBoundTransformFeedback->OnIndexedBindingsChanged();
break;
case LOCAL_GL_UNIFORM:
OnUBIndexedBindingsChanged();
break;
}
}
bool
WebGLContext::DrawElements_check(GLsizei count, GLenum type,
WebGLintptr byteOffset, GLsizei primcount,
const char* info, GLuint* out_upperBound)
{
if (count < 0 || byteOffset < 0) {
ErrorInvalidValue("%s: negative count or offset", info);
return false;
}
if (primcount < 0) {
ErrorInvalidValue("%s: negative primcount", info);
return false;
}
if (!ValidateStencilParamsForDrawCall()) {
return false;
}
// If count is 0, there's nothing to do.
if (count == 0 || primcount == 0)
return false;
uint8_t bytesPerElem = 0;
switch (type) {
case LOCAL_GL_UNSIGNED_BYTE:
bytesPerElem = 1;
break;
case LOCAL_GL_UNSIGNED_SHORT:
bytesPerElem = 2;
break;
case LOCAL_GL_UNSIGNED_INT:
if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::OES_element_index_uint)) {
bytesPerElem = 4;
}
break;
}
if (!bytesPerElem) {
ErrorInvalidEnum("%s: Invalid `type`: 0x%04x", info, type);
return false;
}
if (byteOffset % bytesPerElem != 0) {
ErrorInvalidOperation("%s: `byteOffset` must be a multiple of the size of `type`",
info);
return false;
}
const GLsizei first = byteOffset / bytesPerElem;
const CheckedUint32 checked_byteCount = bytesPerElem * CheckedUint32(count);
if (!checked_byteCount.isValid()) {
ErrorInvalidValue("%s: overflow in byteCount", info);
return false;
}
// Any checks below this depend on a program being available.
if (!mCurrentProgram) {
ErrorInvalidOperation("%s: null CURRENT_PROGRAM", info);
return false;
}
if (!mBoundVertexArray->mElementArrayBuffer) {
ErrorInvalidOperation("%s: must have element array buffer binding", info);
return false;
}
WebGLBuffer& elemArrayBuffer = *mBoundVertexArray->mElementArrayBuffer;
if (!elemArrayBuffer.ByteLength()) {
ErrorInvalidOperation("%s: bound element array buffer doesn't have any data", info);
return false;
}
CheckedInt<GLsizei> checked_neededByteCount = checked_byteCount.toChecked<GLsizei>() + byteOffset;
if (!checked_neededByteCount.isValid()) {
ErrorInvalidOperation("%s: overflow in byteOffset+byteCount", info);
return false;
}
if (uint32_t(checked_neededByteCount.value()) > elemArrayBuffer.ByteLength()) {
ErrorInvalidOperation("%s: bound element array buffer is too small for given count and offset", info);
return false;
}
if (!ValidateBufferFetching(info))
return false;
if (!mMaxFetchedVertices ||
!elemArrayBuffer.Validate(type, mMaxFetchedVertices - 1, first, count, out_upperBound))
{
ErrorInvalidOperation(
"%s: bound vertex attribute buffers do not have sufficient "
"size for given indices from the bound element array", info);
return false;
}
if (uint32_t(primcount) > mMaxFetchedInstances) {
ErrorInvalidOperation("%s: bound instance attribute buffers do not have sufficient size for given primcount", info);
return false;
}
// Bug 1008310 - Check if buffer has been used with a different previous type
if (elemArrayBuffer.IsElementArrayUsedWithMultipleTypes()) {
GenerateWarning("%s: bound element array buffer previously used with a type other than "
"%s, this will affect performance.",
info,
WebGLContext::EnumName(type));
}
MOZ_ASSERT(gl->IsCurrent());
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments(info))
return false;
} else {
ClearBackbufferIfNeeded();
}
if (!DoFakeVertexAttrib0(mMaxFetchedVertices)) {
return false;
}
return true;
}
bool
WebGL2Context::ValidateClearBuffer(const char* funcName, GLenum buffer, GLint drawBuffer,
size_t availElemCount, GLuint elemOffset,
GLenum funcType)
{
if (elemOffset > availElemCount) {
ErrorInvalidValue("%s: Offset too big for list.", funcName);
return false;
}
availElemCount -= elemOffset;
////
size_t requiredElements;
GLint maxDrawBuffer;
switch (buffer) {
case LOCAL_GL_COLOR:
requiredElements = 4;
maxDrawBuffer = mGLMaxDrawBuffers - 1;
break;
case LOCAL_GL_DEPTH:
case LOCAL_GL_STENCIL:
requiredElements = 1;
maxDrawBuffer = 0;
break;
case LOCAL_GL_DEPTH_STENCIL:
requiredElements = 2;
maxDrawBuffer = 0;
break;
default:
ErrorInvalidEnumInfo(funcName, buffer);
return false;
}
if (drawBuffer < 0 || drawBuffer > maxDrawBuffer) {
ErrorInvalidValue("%s: Invalid drawbuffer %d. This buffer only supports"
" `drawbuffer` values between 0 and %u.",
funcName, drawBuffer, maxDrawBuffer);
return false;
}
if (availElemCount < requiredElements) {
ErrorInvalidValue("%s: Not enough elements. Require %u. Given %u.",
funcName, requiredElements, availElemCount);
return false;
}
////
MakeContextCurrent();
const auto& fb = mBoundDrawFramebuffer;
if (fb) {
if (!fb->ValidateAndInitAttachments(funcName))
return false;
if (!fb->ValidateClearBufferType(funcName, buffer, drawBuffer, funcType))
return false;
} else if (buffer == LOCAL_GL_COLOR) {
if (drawBuffer != 0)
return true;
if (mDefaultFB_DrawBuffer0 == LOCAL_GL_NONE)
return true;
if (funcType != LOCAL_GL_FLOAT) {
ErrorInvalidOperation("%s: For default framebuffer, COLOR is always of type"
" FLOAT.",
funcName);
return false;
}
}
return true;
}
void
WebGLContext::DrawBuffers(const dom::Sequence<GLenum>& buffers)
{
if (IsContextLost())
return;
const size_t buffersLength = buffers.Length();
if (!buffersLength) {
return ErrorInvalidValue("drawBuffers: invalid <buffers> (buffers must not be empty)");
}
if (!mBoundDrawFramebuffer) {
// OK: we are rendering in the default framebuffer
/* EXT_draw_buffers :
If the GL is bound to the default framebuffer, then <buffersLength> must be 1
and the constant must be BACK or NONE. When draw buffer zero is
BACK, color values are written into the sole buffer for single-
buffered contexts, or into the back buffer for double-buffered
contexts. If DrawBuffersEXT is supplied with a constant other than
BACK and NONE, the error INVALID_OPERATION is generated.
*/
if (buffersLength != 1) {
return ErrorInvalidValue("drawBuffers: invalid <buffers> (main framebuffer: buffers.length must be 1)");
}
if (buffers[0] == LOCAL_GL_NONE || buffers[0] == LOCAL_GL_BACK) {
gl->Screen()->SetDrawBuffer(buffers[0]);
return;
}
return ErrorInvalidOperation("drawBuffers: invalid operation (main framebuffer: buffers[0] must be GL_NONE or GL_BACK)");
}
// OK: we are rendering in a framebuffer object
if (buffersLength > size_t(mGLMaxDrawBuffers)) {
/* EXT_draw_buffers :
The maximum number of draw buffers is implementation-dependent. The
number of draw buffers supported can be queried by calling
GetIntegerv with the symbolic constant MAX_DRAW_BUFFERS_EXT. An
INVALID_VALUE error is generated if <buffersLength> is greater than
MAX_DRAW_BUFFERS_EXT.
*/
return ErrorInvalidValue("drawBuffers: invalid <buffers> (buffers.length > GL_MAX_DRAW_BUFFERS)");
}
for (uint32_t i = 0; i < buffersLength; i++)
{
/* EXT_draw_buffers :
If the GL is bound to a draw framebuffer object, the <i>th buffer listed
in <bufs> must be COLOR_ATTACHMENT<i>_EXT or NONE. Specifying a
buffer out of order, BACK, or COLOR_ATTACHMENT<m>_EXT where <m> is
greater than or equal to the value of MAX_COLOR_ATTACHMENTS_EXT,
will generate the error INVALID_OPERATION.
*/
/* WEBGL_draw_buffers :
The value of the MAX_COLOR_ATTACHMENTS_WEBGL parameter must be greater than or equal to that of the MAX_DRAW_BUFFERS_WEBGL parameter.
*/
if (buffers[i] != LOCAL_GL_NONE &&
buffers[i] != GLenum(LOCAL_GL_COLOR_ATTACHMENT0 + i)) {
return ErrorInvalidOperation("drawBuffers: invalid operation (buffers[i] must be GL_NONE or GL_COLOR_ATTACHMENTi)");
}
}
MakeContextCurrent();
gl->fDrawBuffers(buffersLength, buffers.Elements());
}
void
WebGL2Context::BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
if (IsContextLost())
return;
const GLbitfield validBits = LOCAL_GL_COLOR_BUFFER_BIT |
LOCAL_GL_DEPTH_BUFFER_BIT |
LOCAL_GL_STENCIL_BUFFER_BIT;
if ((mask | validBits) != validBits) {
ErrorInvalidValue("blitFramebuffer: Invalid bit set in mask.");
return;
}
switch (filter) {
case LOCAL_GL_NEAREST:
case LOCAL_GL_LINEAR:
break;
default:
ErrorInvalidEnumInfo("blitFramebuffer: Bad `filter`:", filter);
return;
}
const GLbitfield depthAndStencilBits = LOCAL_GL_DEPTH_BUFFER_BIT |
LOCAL_GL_STENCIL_BUFFER_BIT;
if (mask & depthAndStencilBits &&
filter != LOCAL_GL_NEAREST)
{
ErrorInvalidOperation("blitFramebuffer: DEPTH_BUFFER_BIT and"
" STENCIL_BUFFER_BIT can only be used with"
" NEAREST filtering.");
return;
}
if (mBoundReadFramebuffer == mBoundDrawFramebuffer) {
// TODO: It's actually more complicated than this. We need to check that
// the underlying buffers are not the same, not the framebuffers
// themselves.
ErrorInvalidOperation("blitFramebuffer: Source and destination must"
" differ.");
return;
}
GLsizei srcSamples;
const webgl::FormatInfo* srcColorFormat = nullptr;
const webgl::FormatInfo* srcDepthFormat = nullptr;
const webgl::FormatInfo* srcStencilFormat = nullptr;
if (mBoundReadFramebuffer) {
if (!mBoundReadFramebuffer->ValidateAndInitAttachments("blitFramebuffer's READ_FRAMEBUFFER"))
return;
if (!GetFBInfoForBlit(mBoundReadFramebuffer, "READ_FRAMEBUFFER", &srcSamples,
&srcColorFormat, &srcDepthFormat, &srcStencilFormat))
{
return;
}
} else {
srcSamples = 0; // Always 0.
GetBackbufferFormats(mOptions, &srcColorFormat, &srcDepthFormat,
&srcStencilFormat);
}
GLsizei dstSamples;
const webgl::FormatInfo* dstColorFormat = nullptr;
const webgl::FormatInfo* dstDepthFormat = nullptr;
const webgl::FormatInfo* dstStencilFormat = nullptr;
if (mBoundDrawFramebuffer) {
if (!mBoundDrawFramebuffer->ValidateAndInitAttachments("blitFramebuffer's DRAW_FRAMEBUFFER"))
return;
if (!GetFBInfoForBlit(mBoundDrawFramebuffer, "DRAW_FRAMEBUFFER", &dstSamples,
&dstColorFormat, &dstDepthFormat, &dstStencilFormat))
{
return;
}
} else {
dstSamples = gl->Screen()->Samples();
GetBackbufferFormats(mOptions, &dstColorFormat, &dstDepthFormat,
&dstStencilFormat);
}
if (mask & LOCAL_GL_COLOR_BUFFER_BIT) {
const auto fnSignlessType = [](const webgl::FormatInfo* format)
-> webgl::ComponentType
{
if (!format)
return webgl::ComponentType::None;
switch (format->componentType) {
case webgl::ComponentType::UInt:
return webgl::ComponentType::Int;
case webgl::ComponentType::NormUInt:
return webgl::ComponentType::NormInt;
default:
return format->componentType;
}
};
const auto srcType = fnSignlessType(srcColorFormat);
const auto dstType = fnSignlessType(dstColorFormat);
if (srcType != dstType) {
ErrorInvalidOperation("blitFramebuffer: Color buffer format component type"
" mismatch.");
return;
}
const bool srcIsInt = (srcType == webgl::ComponentType::Int);
if (srcIsInt && filter != LOCAL_GL_NEAREST) {
ErrorInvalidOperation("blitFramebuffer: Integer read buffers can only"
" be filtered with NEAREST.");
return;
}
}
/* GLES 3.0.4, p199:
* Calling BlitFramebuffer will result in an INVALID_OPERATION error if
* mask includes DEPTH_BUFFER_BIT or STENCIL_BUFFER_BIT, and the source
* and destination depth and stencil buffer formats do not match.
*
* jgilbert: The wording is such that if only DEPTH_BUFFER_BIT is specified,
* the stencil formats must match. This seems wrong. It could be a spec bug,
* or I could be missing an interaction in one of the earlier paragraphs.
*/
if (mask & LOCAL_GL_DEPTH_BUFFER_BIT &&
dstDepthFormat != srcDepthFormat)
{
ErrorInvalidOperation("blitFramebuffer: Depth buffer formats must match"
" if selected.");
return;
}
if (mask & LOCAL_GL_STENCIL_BUFFER_BIT &&
dstStencilFormat != srcStencilFormat)
{
ErrorInvalidOperation("blitFramebuffer: Stencil buffer formats must"
" match if selected.");
return;
}
if (dstSamples != 0) {
ErrorInvalidOperation("blitFramebuffer: DRAW_FRAMEBUFFER may not have"
" multiple samples.");
return;
}
if (srcSamples != 0) {
if (mask & LOCAL_GL_COLOR_BUFFER_BIT &&
dstColorFormat != srcColorFormat)
{
ErrorInvalidOperation("blitFramebuffer: Color buffer formats must"
" match if selected, when reading from a"
" multisampled source.");
return;
}
if (dstX0 != srcX0 ||
dstX1 != srcX1 ||
dstY0 != srcY0 ||
dstY1 != srcY1)
{
ErrorInvalidOperation("blitFramebuffer: If the source is"
" multisampled, then the source and dest"
" regions must match exactly.");
return;
}
}
MakeContextCurrent();
gl->fBlitFramebuffer(srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
mask, filter);
}
void
WebGL2Context::CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
const char funcName[] = "copyBufferSubData";
if (IsContextLost())
return;
const auto& readBuffer = ValidateBufferSelection(funcName, readTarget);
if (!readBuffer)
return;
const auto& writeBuffer = ValidateBufferSelection(funcName, writeTarget);
if (!writeBuffer)
return;
if (readBuffer->mNumActiveTFOs ||
writeBuffer->mNumActiveTFOs)
{
ErrorInvalidOperation("%s: Buffer is bound to an active transform feedback"
" object.",
funcName);
return;
}
if (!ValidateNonNegative(funcName, "readOffset", readOffset) ||
!ValidateNonNegative(funcName, "writeOffset", writeOffset) ||
!ValidateNonNegative(funcName, "size", size))
{
return;
}
const auto fnValidateOffsetSize = [&](const char* info, GLintptr offset,
const WebGLBuffer* buffer)
{
const auto neededBytes = CheckedInt<size_t>(offset) + size;
if (!neededBytes.isValid() || neededBytes.value() > buffer->ByteLength()) {
ErrorInvalidValue("%s: Invalid %s range.", funcName, info);
return false;
}
return true;
};
if (!fnValidateOffsetSize("read", readOffset, readBuffer) ||
!fnValidateOffsetSize("write", writeOffset, writeBuffer))
{
return;
}
if (readBuffer == writeBuffer &&
!ValidateDataRanges(readOffset, writeOffset, size, funcName))
{
return;
}
const auto& readType = readBuffer->Content();
const auto& writeType = writeBuffer->Content();
MOZ_ASSERT(readType != WebGLBuffer::Kind::Undefined);
MOZ_ASSERT(writeType != WebGLBuffer::Kind::Undefined);
if (writeType != readType) {
ErrorInvalidOperation("%s: Can't copy %s data to %s data.",
funcName,
(readType == WebGLBuffer::Kind::OtherData) ? "other"
: "element",
(writeType == WebGLBuffer::Kind::OtherData) ? "other"
: "element");
return;
}
gl->MakeCurrent();
gl->fCopyBufferSubData(readTarget, writeTarget, readOffset, writeOffset, size);
}
void
WebGL2Context::GetBufferSubData(GLenum target, GLintptr offset,
const dom::ArrayBufferView& data)
{
const char funcName[] = "getBufferSubData";
if (IsContextLost())
return;
if (!ValidateNonNegative(funcName, "offset", offset))
return;
const auto& buffer = ValidateBufferSelection(funcName, target);
if (!buffer)
return;
////
// If offset + returnedData.byteLength would extend beyond the end
// of the buffer an INVALID_VALUE error is generated.
data.ComputeLengthAndData();
const auto neededByteLength = CheckedInt<size_t>(offset) + data.LengthAllowShared();
if (!neededByteLength.isValid()) {
ErrorInvalidValue("%s: Integer overflow computing the needed byte length.",
funcName);
return;
}
if (neededByteLength.value() > buffer->ByteLength()) {
ErrorInvalidValue("%s: Not enough data. Operation requires %d bytes, but buffer"
" only has %d bytes.",
funcName, neededByteLength.value(), buffer->ByteLength());
return;
}
////
if (buffer->mNumActiveTFOs) {
ErrorInvalidOperation("%s: Buffer is bound to an active transform feedback"
" object.",
funcName);
return;
}
if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER &&
mBoundTransformFeedback->mIsActive)
{
ErrorInvalidOperation("%s: Currently bound transform feedback is active.",
funcName);
return;
}
////
gl->MakeCurrent();
const auto ptr = gl->fMapBufferRange(target, offset, data.LengthAllowShared(),
LOCAL_GL_MAP_READ_BIT);
// Warning: Possibly shared memory. See bug 1225033.
memcpy(data.DataAllowShared(), ptr, data.LengthAllowShared());
gl->fUnmapBuffer(target);
}
void
WebGL2Context::GetActiveUniforms(JSContext* cx, const WebGLProgram& program,
const dom::Sequence<GLuint>& uniformIndices,
GLenum pname, JS::MutableHandleValue retval)
{
const char funcName[] = "getActiveUniforms";
retval.setNull();
if (IsContextLost())
return;
if (!ValidateUniformEnum(this, pname, funcName))
return;
if (!ValidateObject("getActiveUniforms: program", program))
return;
const auto& numActiveUniforms = program.LinkInfo()->uniforms.size();
for (const auto& curIndex : uniformIndices) {
if (curIndex >= numActiveUniforms) {
ErrorInvalidValue("%s: Too-large active uniform index queried.", funcName);
return;
}
}
const auto& count = uniformIndices.Length();
JS::Rooted<JSObject*> array(cx, JS_NewArrayObject(cx, count));
UniquePtr<GLint[]> samples(new GLint[count]);
if (!array || !samples) {
ErrorOutOfMemory("%s: Failed to allocate buffers.", funcName);
return;
}
retval.setObject(*array);
MakeContextCurrent();
gl->fGetActiveUniformsiv(program.mGLName, count, uniformIndices.Elements(), pname,
samples.get());
switch (pname) {
case LOCAL_GL_UNIFORM_TYPE:
case LOCAL_GL_UNIFORM_SIZE:
case LOCAL_GL_UNIFORM_BLOCK_INDEX:
case LOCAL_GL_UNIFORM_OFFSET:
case LOCAL_GL_UNIFORM_ARRAY_STRIDE:
case LOCAL_GL_UNIFORM_MATRIX_STRIDE:
for (size_t i = 0; i < count; ++i) {
JS::RootedValue value(cx);
value = JS::Int32Value(samples[i]);
if (!JS_DefineElement(cx, array, i, value, JSPROP_ENUMERATE))
return;
}
break;
case LOCAL_GL_UNIFORM_IS_ROW_MAJOR:
for (size_t i = 0; i < count; ++i) {
JS::RootedValue value(cx);
value = JS::BooleanValue(samples[i]);
if (!JS_DefineElement(cx, array, i, value, JSPROP_ENUMERATE))
return;
}
break;
default:
MOZ_CRASH("Invalid pname");
}
}
void
WebGL2Context::InvalidateSubFramebuffer(GLenum target, const dom::Sequence<GLenum>& attachments,
GLint x, GLint y, GLsizei width, GLsizei height,
ErrorResult& rv)
{
const char funcName[] = "invalidateSubFramebuffer";
if (IsContextLost())
return;
MakeContextCurrent();
if (!ValidateFramebufferTarget(target, funcName))
return;
if (width < 0 || height < 0) {
ErrorInvalidValue("%s: width and height must be >= 0.", funcName);
return;
}
const WebGLFramebuffer* fb;
bool isDefaultFB;
switch (target) {
case LOCAL_GL_FRAMEBUFFER:
case LOCAL_GL_DRAW_FRAMEBUFFER:
fb = mBoundDrawFramebuffer;
isDefaultFB = gl->Screen()->IsDrawFramebufferDefault();
break;
case LOCAL_GL_READ_FRAMEBUFFER:
fb = mBoundReadFramebuffer;
isDefaultFB = gl->Screen()->IsReadFramebufferDefault();
break;
default:
MOZ_CRASH("Bad target.");
}
const bool badColorAttachmentIsInvalidOp = true;
for (size_t i = 0; i < attachments.Length(); i++) {
if (!ValidateFramebufferAttachment(fb, attachments[i], funcName,
badColorAttachmentIsInvalidOp))
{
return;
}
}
// InvalidateFramebuffer is a hint to the driver. Should be OK to
// skip calls if not supported, for example by OSX 10.9 GL
// drivers.
if (!gl->IsSupported(gl::GLFeature::invalidate_framebuffer))
return;
if (!fb && !isDefaultFB) {
dom::Sequence<GLenum> tmpAttachments;
if (!TranslateDefaultAttachments(attachments, &tmpAttachments)) {
rv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
gl->fInvalidateSubFramebuffer(target, tmpAttachments.Length(),
tmpAttachments.Elements(), x, y, width, height);
} else {
gl->fInvalidateSubFramebuffer(target, attachments.Length(),
attachments.Elements(), x, y, width, height);
}
}
void
WebGL2Context::FramebufferTextureLayer(GLenum target, GLenum attachment,
WebGLTexture* texture, GLint level, GLint layer)
{
if (IsContextLost())
return;
if (!ValidateFramebufferTarget(target, "framebufferTextureLayer"))
return;
if (!ValidateTextureLayerAttachment(attachment))
return ErrorInvalidEnumInfo("framebufferTextureLayer: attachment:", attachment);
if (texture) {
if (texture->IsDeleted()) {
return ErrorInvalidValue("framebufferTextureLayer: texture must be a valid "
"texture object.");
}
if (layer < 0)
return ErrorInvalidValue("framebufferTextureLayer: layer must be >= 0.");
if (level < 0)
return ErrorInvalidValue("framebufferTextureLayer: level must be >= 0.");
switch (texture->Target().get()) {
case LOCAL_GL_TEXTURE_3D:
if (uint32_t(layer) >= mImplMax3DTextureSize) {
return ErrorInvalidValue("framebufferTextureLayer: layer must be < "
"MAX_3D_TEXTURE_SIZE");
}
if (uint32_t(level) > FloorLog2(mImplMax3DTextureSize)) {
return ErrorInvalidValue("framebufferTextureLayer: layer mube be <= "
"log2(MAX_3D_TEXTURE_SIZE");
}
break;
case LOCAL_GL_TEXTURE_2D_ARRAY:
if (uint32_t(layer) >= mImplMaxArrayTextureLayers) {
return ErrorInvalidValue("framebufferTextureLayer: layer must be < "
"MAX_ARRAY_TEXTURE_LAYERS");
}
if (uint32_t(level) > FloorLog2(mImplMaxTextureSize)) {
return ErrorInvalidValue("framebufferTextureLayer: layer mube be <= "
"log2(MAX_TEXTURE_SIZE");
}
break;
default:
return ErrorInvalidOperation("framebufferTextureLayer: texture must be an "
"existing 3D texture, or a 2D texture array.");
}
}
WebGLFramebuffer* fb;
switch (target) {
case LOCAL_GL_FRAMEBUFFER:
case LOCAL_GL_DRAW_FRAMEBUFFER:
fb = mBoundDrawFramebuffer;
break;
case LOCAL_GL_READ_FRAMEBUFFER:
fb = mBoundReadFramebuffer;
break;
default:
MOZ_CRASH("Bad target.");
}
if (!fb) {
return ErrorInvalidOperation("framebufferTextureLayer: cannot modify"
" framebuffer 0.");
}
fb->FramebufferTextureLayer(attachment, texture, level, layer);
}
