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::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 WebGLContext::BufferData(GLenum target, WebGLsizeiptr size, GLenum usage) {
const FuncScope funcScope(*this, "bufferData");
if (IsContextLost()) return;
if (!ValidateNonNegative("size", size)) return;
////
const auto checkedSize = CheckedInt<size_t>(size);
if (!checkedSize.isValid())
return ErrorOutOfMemory("size too large for platform.");
const UniqueBuffer zeroBuffer(calloc(checkedSize.value(), 1u));
if (!zeroBuffer) return ErrorOutOfMemory("Failed to allocate zeros.");
BufferDataImpl(target, uint64_t{checkedSize.value()},
(const uint8_t*)zeroBuffer.get(), usage);
}
void
WebGLContext::BufferDataT(GLenum target,
const BufferT& data,
GLenum usage)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(target, "bufferData"))
return;
const WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
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, 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
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");
}
}
bool
WebGLContext::DoFakeVertexAttrib0(GLuint vertexCount)
{
WebGLVertexAttrib0Status whatDoesAttrib0Need = WhatDoesVertexAttrib0Need();
if (MOZ_LIKELY(whatDoesAttrib0Need == WebGLVertexAttrib0Status::Default))
return true;
if (!mAlreadyWarnedAboutFakeVertexAttrib0) {
GenerateWarning("Drawing without vertex attrib 0 array enabled forces the browser "
"to do expensive emulation work when running on desktop OpenGL "
"platforms, for example on Mac. It is preferable to always draw "
"with vertex attrib 0 array enabled, by using bindAttribLocation "
"to bind some always-used attribute to location 0.");
mAlreadyWarnedAboutFakeVertexAttrib0 = true;
}
CheckedUint32 checked_dataSize = CheckedUint32(vertexCount) * 4 * sizeof(GLfloat);
if (!checked_dataSize.isValid()) {
ErrorOutOfMemory("Integer overflow trying to construct a fake vertex attrib 0 array for a draw-operation "
"with %d vertices. Try reducing the number of vertices.", vertexCount);
return false;
}
GLuint dataSize = checked_dataSize.value();
if (!mFakeVertexAttrib0BufferObject) {
gl->fGenBuffers(1, &mFakeVertexAttrib0BufferObject);
}
// if the VBO status is already exactly what we need, or if the only difference is that it's initialized and
// we don't need it to be, then consider it OK
bool vertexAttrib0BufferStatusOK =
mFakeVertexAttrib0BufferStatus == whatDoesAttrib0Need ||
(mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray &&
whatDoesAttrib0Need == WebGLVertexAttrib0Status::EmulatedUninitializedArray);
if (!vertexAttrib0BufferStatusOK ||
mFakeVertexAttrib0BufferObjectSize < dataSize ||
mFakeVertexAttrib0BufferObjectVector[0] != mVertexAttrib0Vector[0] ||
mFakeVertexAttrib0BufferObjectVector[1] != mVertexAttrib0Vector[1] ||
mFakeVertexAttrib0BufferObjectVector[2] != mVertexAttrib0Vector[2] ||
mFakeVertexAttrib0BufferObjectVector[3] != mVertexAttrib0Vector[3])
{
mFakeVertexAttrib0BufferStatus = whatDoesAttrib0Need;
mFakeVertexAttrib0BufferObjectSize = dataSize;
mFakeVertexAttrib0BufferObjectVector[0] = mVertexAttrib0Vector[0];
mFakeVertexAttrib0BufferObjectVector[1] = mVertexAttrib0Vector[1];
mFakeVertexAttrib0BufferObjectVector[2] = mVertexAttrib0Vector[2];
mFakeVertexAttrib0BufferObjectVector[3] = mVertexAttrib0Vector[3];
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
GetAndFlushUnderlyingGLErrors();
if (mFakeVertexAttrib0BufferStatus == WebGLVertexAttrib0Status::EmulatedInitializedArray) {
auto array = MakeUniqueFallible<GLfloat[]>(4 * vertexCount);
if (!array) {
ErrorOutOfMemory("Fake attrib0 array.");
return false;
}
for(size_t i = 0; i < vertexCount; ++i) {
array[4 * i + 0] = mVertexAttrib0Vector[0];
array[4 * i + 1] = mVertexAttrib0Vector[1];
array[4 * i + 2] = mVertexAttrib0Vector[2];
array[4 * i + 3] = mVertexAttrib0Vector[3];
}
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, array.get(), LOCAL_GL_DYNAMIC_DRAW);
} else {
gl->fBufferData(LOCAL_GL_ARRAY_BUFFER, dataSize, nullptr, LOCAL_GL_DYNAMIC_DRAW);
}
GLenum error = GetAndFlushUnderlyingGLErrors();
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mBoundArrayBuffer ? mBoundArrayBuffer->mGLName : 0);
// note that we do this error checking and early return AFTER having restored the buffer binding above
if (error) {
ErrorOutOfMemory("Ran out of memory trying to construct a fake vertex attrib 0 array for a draw-operation "
"with %d vertices. Try reducing the number of vertices.", vertexCount);
return false;
}
}
gl->fBindBuffer(LOCAL_GL_ARRAY_BUFFER, mFakeVertexAttrib0BufferObject);
gl->fVertexAttribPointer(0, 4, LOCAL_GL_FLOAT, LOCAL_GL_FALSE, 0, 0);
return true;
}
