gl::Error StaticVertexBufferInterface::storeVertexAttributes(const gl::VertexAttribute &attrib,
GLenum currentValueType,
GLint start,
GLsizei count,
GLsizei instances,
unsigned int *outStreamOffset,
const uint8_t *sourceData)
{
unsigned int streamOffset;
gl::Error error = VertexBufferInterface::storeVertexAttributes(attrib, currentValueType, start, count, instances, &streamOffset, sourceData);
if (error.isError())
{
return error;
}
size_t attributeOffset = static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib);
VertexElement element = { attrib.type, attrib.size, static_cast<GLuint>(ComputeVertexAttributeStride(attrib)), attrib.normalized, attrib.pureInteger, attributeOffset, streamOffset };
mCache.push_back(element);
if (outStreamOffset)
{
*outStreamOffset = streamOffset;
}
return gl::Error(GL_NO_ERROR);
}
// static
angle::Result VertexDataManager::StoreStaticAttrib(const gl::Context *context,
TranslatedAttribute *translated)
{
ASSERT(translated->attribute && translated->binding);
const auto &attrib = *translated->attribute;
const auto &binding = *translated->binding;
gl::Buffer *buffer = binding.getBuffer().get();
ASSERT(buffer && attrib.enabled && !DirectStoragePossible(context, attrib, binding));
BufferD3D *bufferD3D = GetImplAs<BufferD3D>(buffer);
// Compute source data pointer
const uint8_t *sourceData = nullptr;
const int offset = static_cast<int>(ComputeVertexAttributeOffset(attrib, binding));
ANGLE_TRY(bufferD3D->getData(context, &sourceData));
sourceData += offset;
unsigned int streamOffset = 0;
translated->storage = nullptr;
ANGLE_TRY(bufferD3D->getFactory()->getVertexSpaceRequired(context, attrib, binding, 1, 0,
&translated->stride));
auto *staticBuffer = bufferD3D->getStaticVertexBuffer(attrib, binding);
ASSERT(staticBuffer);
if (staticBuffer->empty())
{
// Convert the entire buffer
int totalCount =
ElementsInBuffer(attrib, binding, static_cast<unsigned int>(bufferD3D->getSize()));
int startIndex = offset / static_cast<int>(ComputeVertexAttributeStride(attrib, binding));
ANGLE_TRY(staticBuffer->storeStaticAttribute(context, attrib, binding, -startIndex,
totalCount, 0, sourceData));
}
unsigned int firstElementOffset =
(static_cast<unsigned int>(offset) /
static_cast<unsigned int>(ComputeVertexAttributeStride(attrib, binding))) *
translated->stride;
VertexBuffer *vertexBuffer = staticBuffer->getVertexBuffer();
CheckedNumeric<unsigned int> checkedOffset(streamOffset);
checkedOffset += firstElementOffset;
ANGLE_CHECK_HR_MATH(GetImplAs<ContextD3D>(context), checkedOffset.IsValid());
translated->vertexBuffer.set(vertexBuffer);
translated->serial = vertexBuffer->getSerial();
translated->baseOffset = streamOffset + firstElementOffset;
// Instanced vertices do not apply the 'start' offset
translated->usesFirstVertexOffset = (binding.getDivisor() == 0);
return angle::Result::Continue();
}
gl::Error VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib,
GLenum currentValueType,
GLint start,
GLsizei count,
GLsizei instances,
unsigned int offset,
const uint8_t *sourceData)
{
if (!mBuffer)
{
return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
}
int inputStride = static_cast<int>(ComputeVertexAttributeStride(attrib));
// This will map the resource if it isn't already mapped.
ANGLE_TRY(mapResource());
uint8_t *output = mMappedResourceData + offset;
const uint8_t *input = sourceData;
if (instances == 0 || attrib.divisor == 0)
{
input += inputStride * start;
}
gl::VertexFormatType vertexFormatType = gl::GetVertexFormatType(attrib, currentValueType);
const D3D_FEATURE_LEVEL featureLevel = mRenderer->getRenderer11DeviceCaps().featureLevel;
const d3d11::VertexFormat &vertexFormatInfo = d3d11::GetVertexFormatInfo(vertexFormatType, featureLevel);
ASSERT(vertexFormatInfo.copyFunction != NULL);
vertexFormatInfo.copyFunction(input, inputStride, count, output);
return gl::NoError();
}
bool VertexBufferInterface::directStoragePossible(const gl::VertexAttribute &attrib,
const gl::VertexAttribCurrentValueData ¤tValue) const
{
gl::Buffer *buffer = attrib.buffer.get();
BufferD3D *storage = buffer ? BufferD3D::makeBufferD3D(buffer->getImplementation()) : NULL;
if (!storage || !storage->supportsDirectBinding())
{
return false;
}
// Alignment restrictions: In D3D, vertex data must be aligned to
// the format stride, or to a 4-byte boundary, whichever is smaller.
// (Undocumented, and experimentally confirmed)
size_t alignment = 4;
bool requiresConversion = false;
if (attrib.type != GL_FLOAT)
{
gl::VertexFormat vertexFormat(attrib, currentValue.Type);
unsigned int outputElementSize;
getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
alignment = std::min<size_t>(outputElementSize, 4);
requiresConversion = (mRenderer->getVertexConversionType(vertexFormat) & VERTEX_CONVERT_CPU) != 0;
}
bool isAligned = (static_cast<size_t>(ComputeVertexAttributeStride(attrib)) % alignment == 0) &&
(static_cast<size_t>(attrib.offset) % alignment == 0);
return !requiresConversion && isAligned;
}
gl::Error VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue,
GLint start, GLsizei count, GLsizei instances, unsigned int offset)
{
if (!mBuffer)
{
return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
}
gl::Buffer *buffer = attrib.buffer.get();
int inputStride = ComputeVertexAttributeStride(attrib);
ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
if (FAILED(result))
{
return gl::Error(GL_OUT_OF_MEMORY, "Failed to map internal vertex buffer, HRESULT: 0x%08x.", result);
}
uint8_t *output = reinterpret_cast<uint8_t*>(mappedResource.pData) + offset;
const uint8_t *input = NULL;
if (attrib.enabled)
{
if (buffer)
{
BufferD3D *storage = BufferD3D::makeFromBuffer(buffer);
gl::Error error = storage->getData(&input);
if (error.isError())
{
return error;
}
input += static_cast<int>(attrib.offset);
}
else
{
input = static_cast<const uint8_t*>(attrib.pointer);
}
}
else
{
input = reinterpret_cast<const uint8_t*>(currentValue.FloatValues);
}
if (instances == 0 || attrib.divisor == 0)
{
input += inputStride * start;
}
gl::VertexFormat vertexFormat(attrib, currentValue.Type);
const d3d11::VertexFormat &vertexFormatInfo = d3d11::GetVertexFormatInfo(vertexFormat);
ASSERT(vertexFormatInfo.copyFunction != NULL);
vertexFormatInfo.copyFunction(input, inputStride, count, output);
dxContext->Unmap(mBuffer, 0);
return gl::Error(GL_NO_ERROR);
}
bool VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue,
GLint start, GLsizei count, GLsizei instances, unsigned int offset)
{
if (mBuffer)
{
gl::Buffer *buffer = attrib.buffer.get();
int inputStride = ComputeVertexAttributeStride(attrib);
ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
D3D11_MAPPED_SUBRESOURCE mappedResource;
HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
if (FAILED(result))
{
ERR("Vertex buffer map failed with error 0x%08x", result);
return false;
}
uint8_t* output = reinterpret_cast<uint8_t*>(mappedResource.pData) + offset;
const uint8_t *input = NULL;
if (attrib.enabled)
{
if (buffer)
{
Buffer11 *storage = Buffer11::makeBuffer11(buffer->getImplementation());
input = static_cast<const uint8_t*>(storage->getData()) + static_cast<int>(attrib.offset);
}
else
{
input = static_cast<const uint8_t*>(attrib.pointer);
}
}
else
{
input = reinterpret_cast<const uint8_t*>(currentValue.FloatValues);
}
if (instances == 0 || attrib.divisor == 0)
{
input += inputStride * start;
}
gl::VertexFormat vertexFormat(attrib, currentValue.Type);
const d3d11::VertexFormat &vertexFormatInfo = d3d11::GetVertexFormatInfo(vertexFormat);
ASSERT(vertexFormatInfo.copyFunction != NULL);
vertexFormatInfo.copyFunction(input, inputStride, count, output);
dxContext->Unmap(mBuffer, 0);
return true;
}
else
{
ERR("Vertex buffer not initialized.");
return false;
}
}
static int ElementsInBuffer(const gl::VertexAttribute &attrib, unsigned int size)
{
// Size cannot be larger than a GLsizei
if (size > static_cast<unsigned int>(std::numeric_limits<int>::max()))
{
size = static_cast<unsigned int>(std::numeric_limits<int>::max());
}
GLsizei stride = ComputeVertexAttributeStride(attrib);
return (size - attrib.offset % stride + (stride - ComputeVertexAttributeTypeSize(attrib))) / stride;
}
bool StaticVertexBufferInterface::storeVertexAttributes(const gl::VertexAttribute &attrib, const gl::VertexAttribCurrentValueData ¤tValue,
GLint start, GLsizei count, GLsizei instances, unsigned int *outStreamOffset)
{
unsigned int streamOffset;
if (VertexBufferInterface::storeVertexAttributes(attrib, currentValue, start, count, instances, &streamOffset))
{
size_t attributeOffset = static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib);
VertexElement element = { attrib.type, attrib.size, ComputeVertexAttributeStride(attrib), attrib.normalized, attrib.pureInteger, attributeOffset, streamOffset };
mCache.push_back(element);
if (outStreamOffset)
{
*outStreamOffset = streamOffset;
}
return true;
}
else
{
return false;
}
}
bool StaticVertexBufferInterface::lookupAttribute(const gl::VertexAttribute &attrib, unsigned int *outStreamOffset)
{
for (unsigned int element = 0; element < mCache.size(); element++)
{
if (mCache[element].type == attrib.type &&
mCache[element].size == attrib.size &&
mCache[element].stride == ComputeVertexAttributeStride(attrib) &&
mCache[element].normalized == attrib.normalized &&
mCache[element].pureInteger == attrib.pureInteger)
{
size_t offset = (static_cast<size_t>(attrib.offset) % ComputeVertexAttributeStride(attrib));
if (mCache[element].attributeOffset == offset)
{
if (outStreamOffset)
{
*outStreamOffset = mCache[element].streamOffset;
}
return true;
}
}
}
return false;
}
// static
void VertexDataManager::StoreDirectAttrib(TranslatedAttribute *directAttrib, GLint start)
{
const auto &attrib = *directAttrib->attribute;
gl::Buffer *buffer = attrib.buffer.get();
BufferD3D *bufferD3D = buffer ? GetImplAs<BufferD3D>(buffer) : nullptr;
// Instanced vertices do not apply the 'start' offset
GLint firstVertexIndex = (attrib.divisor > 0 ? 0 : start);
ASSERT(DirectStoragePossible(attrib));
directAttrib->vertexBuffer.set(nullptr);
directAttrib->storage = bufferD3D;
directAttrib->serial = bufferD3D->getSerial();
directAttrib->stride = static_cast<unsigned int>(ComputeVertexAttributeStride(attrib));
directAttrib->offset =
static_cast<unsigned int>(attrib.offset + directAttrib->stride * firstVertexIndex);
}
// static
void VertexDataManager::StoreDirectAttrib(const gl::Context *context,
TranslatedAttribute *directAttrib)
{
ASSERT(directAttrib->attribute && directAttrib->binding);
const auto &attrib = *directAttrib->attribute;
const auto &binding = *directAttrib->binding;
gl::Buffer *buffer = binding.getBuffer().get();
ASSERT(buffer);
BufferD3D *bufferD3D = GetImplAs<BufferD3D>(buffer);
ASSERT(DirectStoragePossible(context, attrib, binding));
directAttrib->vertexBuffer.set(nullptr);
directAttrib->storage = bufferD3D;
directAttrib->serial = bufferD3D->getSerial();
directAttrib->stride = static_cast<unsigned int>(ComputeVertexAttributeStride(attrib, binding));
directAttrib->baseOffset =
static_cast<unsigned int>(ComputeVertexAttributeOffset(attrib, binding));
// Instanced vertices do not apply the 'start' offset
directAttrib->usesFirstVertexOffset = (binding.getDivisor() == 0);
}
gl::Error VertexDataManager::storeAttribute(TranslatedAttribute *translated,
GLint start,
GLsizei count,
GLsizei instances)
{
const gl::VertexAttribute &attrib = *translated->attribute;
gl::Buffer *buffer = attrib.buffer.get();
ASSERT(buffer || attrib.pointer);
ASSERT(attrib.enabled);
BufferD3D *storage = buffer ? GetImplAs<BufferD3D>(buffer) : NULL;
StaticVertexBufferInterface *staticBuffer =
storage ? storage->getStaticVertexBuffer(attrib) : NULL;
VertexBufferInterface *vertexBuffer = staticBuffer ? staticBuffer : static_cast<VertexBufferInterface*>(mStreamingBuffer);
bool directStorage = vertexBuffer->directStoragePossible(attrib, translated->currentValueType);
// Instanced vertices do not apply the 'start' offset
GLint firstVertexIndex = (instances > 0 && attrib.divisor > 0 ? 0 : start);
translated->vertexBuffer = vertexBuffer->getVertexBuffer();
if (directStorage)
{
translated->storage = storage;
translated->serial = storage->getSerial();
translated->stride = static_cast<unsigned int>(ComputeVertexAttributeStride(attrib));
translated->offset = static_cast<unsigned int>(attrib.offset + translated->stride * firstVertexIndex);
return gl::Error(GL_NO_ERROR);
}
// Compute source data pointer
const uint8_t *sourceData = nullptr;
if (buffer)
{
gl::Error error = storage->getData(&sourceData);
if (error.isError())
{
return error;
}
sourceData += static_cast<int>(attrib.offset);
}
else
{
sourceData = static_cast<const uint8_t*>(attrib.pointer);
}
unsigned int streamOffset = 0;
unsigned int outputElementSize = 0;
if (staticBuffer)
{
gl::Error error = staticBuffer->getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
if (error.isError())
{
return error;
}
if (!staticBuffer->lookupAttribute(attrib, &streamOffset))
{
// Convert the entire buffer
int totalCount =
ElementsInBuffer(attrib, static_cast<unsigned int>(storage->getSize()));
int startIndex = static_cast<int>(attrib.offset) /
static_cast<int>(ComputeVertexAttributeStride(attrib));
error = staticBuffer->storeVertexAttributes(attrib,
translated->currentValueType,
-startIndex,
totalCount,
0,
&streamOffset,
sourceData);
if (error.isError())
{
return error;
}
}
unsigned int firstElementOffset =
(static_cast<unsigned int>(attrib.offset) /
static_cast<unsigned int>(ComputeVertexAttributeStride(attrib))) *
outputElementSize;
unsigned int startOffset = (instances == 0 || attrib.divisor == 0) ? firstVertexIndex * outputElementSize : 0;
if (streamOffset + firstElementOffset + startOffset < streamOffset)
{
return gl::Error(GL_OUT_OF_MEMORY);
}
streamOffset += firstElementOffset + startOffset;
}
else
{
size_t totalCount = ComputeVertexAttributeElementCount(attrib, count, instances);
gl::Error error = mStreamingBuffer->getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
if (error.isError())
{
return error;
}
error = mStreamingBuffer->storeVertexAttributes(
attrib, translated->currentValueType, firstVertexIndex,
static_cast<GLsizei>(totalCount), instances, &streamOffset, sourceData);
if (error.isError())
{
return error;
}
}
translated->storage = nullptr;
translated->serial = vertexBuffer->getSerial();
translated->stride = outputElementSize;
translated->offset = streamOffset;
return gl::Error(GL_NO_ERROR);
}
// static
gl::Error VertexDataManager::StoreStaticAttrib(TranslatedAttribute *translated,
GLint start,
GLsizei count,
GLsizei instances)
{
const gl::VertexAttribute &attrib = *translated->attribute;
gl::Buffer *buffer = attrib.buffer.get();
ASSERT(buffer && attrib.enabled && !DirectStoragePossible(attrib));
BufferD3D *bufferD3D = GetImplAs<BufferD3D>(buffer);
// Instanced vertices do not apply the 'start' offset
GLint firstVertexIndex = (attrib.divisor > 0 ? 0 : start);
// Compute source data pointer
const uint8_t *sourceData = nullptr;
gl::Error error = bufferD3D->getData(&sourceData);
if (error.isError())
{
return error;
}
sourceData += static_cast<int>(attrib.offset);
unsigned int streamOffset = 0;
auto errorOrOutputElementSize = bufferD3D->getFactory()->getVertexSpaceRequired(attrib, 1, 0);
if (errorOrOutputElementSize.isError())
{
return errorOrOutputElementSize.getError();
}
translated->storage = nullptr;
translated->stride = errorOrOutputElementSize.getResult();
auto *staticBuffer = bufferD3D->getStaticVertexBuffer(attrib);
ASSERT(staticBuffer);
if (staticBuffer->empty())
{
// Convert the entire buffer
int totalCount = ElementsInBuffer(attrib, static_cast<unsigned int>(bufferD3D->getSize()));
int startIndex = static_cast<int>(attrib.offset) /
static_cast<int>(ComputeVertexAttributeStride(attrib));
error = staticBuffer->storeStaticAttribute(attrib, -startIndex, totalCount, 0, sourceData);
if (error.isError())
{
return error;
}
}
unsigned int firstElementOffset =
(static_cast<unsigned int>(attrib.offset) /
static_cast<unsigned int>(ComputeVertexAttributeStride(attrib))) *
translated->stride;
ASSERT(attrib.divisor == 0 || firstVertexIndex == 0);
unsigned int startOffset = firstVertexIndex * translated->stride;
if (streamOffset + firstElementOffset + startOffset < streamOffset)
{
return gl::Error(GL_OUT_OF_MEMORY);
}
VertexBuffer *vertexBuffer = staticBuffer->getVertexBuffer();
translated->vertexBuffer.set(vertexBuffer);
translated->serial = vertexBuffer->getSerial();
translated->offset = streamOffset + firstElementOffset + startOffset;
return gl::Error(GL_NO_ERROR);
}
gl::Error VertexArrayGL::streamAttributes(const std::vector<GLuint> &activeAttribLocations, size_t streamingDataSize,
size_t maxAttributeDataSize, const gl::RangeUI &indexRange) const
{
if (mStreamingArrayBuffer == 0)
{
mFunctions->genBuffers(1, &mStreamingArrayBuffer);
mStreamingArrayBufferSize = 0;
}
// If first is greater than zero, a slack space needs to be left at the beginning of the buffer so that
// the same 'first' argument can be passed into the draw call.
const size_t bufferEmptySpace = maxAttributeDataSize * indexRange.start;
const size_t requiredBufferSize = streamingDataSize + bufferEmptySpace;
mStateManager->bindBuffer(GL_ARRAY_BUFFER, mStreamingArrayBuffer);
if (requiredBufferSize > mStreamingArrayBufferSize)
{
mFunctions->bufferData(GL_ARRAY_BUFFER, requiredBufferSize, nullptr, GL_DYNAMIC_DRAW);
mStreamingArrayBufferSize = requiredBufferSize;
}
// Unmapping a buffer can return GL_FALSE to indicate that the system has corrupted the data
// somehow (such as by a screen change), retry writing the data a few times and return OUT_OF_MEMORY
// if that fails.
GLboolean unmapResult = GL_FALSE;
size_t unmapRetryAttempts = 5;
while (unmapResult != GL_TRUE && --unmapRetryAttempts > 0)
{
uint8_t *bufferPointer = reinterpret_cast<uint8_t*>(mFunctions->mapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY));
size_t curBufferOffset = bufferEmptySpace;
const size_t streamedVertexCount = indexRange.end - indexRange.start + 1;
const auto &attribs = mData.getVertexAttributes();
for (size_t activeAttrib = 0; activeAttrib < activeAttribLocations.size(); activeAttrib++)
{
GLuint idx = activeAttribLocations[activeAttrib];
const auto &attrib = attribs[idx];
if (attrib.enabled && attrib.buffer.get() == nullptr)
{
const size_t sourceStride = ComputeVertexAttributeStride(attrib);
const size_t destStride = ComputeVertexAttributeTypeSize(attrib);
const uint8_t *inputPointer = reinterpret_cast<const uint8_t*>(attrib.pointer);
// Pack the data when copying it, user could have supplied a very large stride that would
// cause the buffer to be much larger than needed.
if (destStride == sourceStride)
{
// Can copy in one go, the data is packed
memcpy(bufferPointer + curBufferOffset,
inputPointer + (sourceStride * indexRange.start),
destStride * streamedVertexCount);
}
else
{
// Copy each vertex individually
for (size_t vertexIdx = indexRange.start; vertexIdx <= indexRange.end; vertexIdx++)
{
memcpy(bufferPointer + curBufferOffset + (destStride * vertexIdx),
inputPointer + (sourceStride * vertexIdx),
destStride);
}
}
// Compute where the 0-index vertex would be.
const size_t vertexStartOffset = curBufferOffset - (indexRange.start * destStride);
mFunctions->vertexAttribPointer(idx, attrib.size, attrib.type,
attrib.normalized, destStride,
reinterpret_cast<const GLvoid*>(vertexStartOffset));
curBufferOffset += destStride * streamedVertexCount;
// Mark the applied attribute as dirty by setting an invalid size so that if it doesn't
// need to be streamed later, there is no chance that the caching will skip it.
mAppliedAttributes[idx].size = static_cast<GLuint>(-1);
}
}
unmapResult = mFunctions->unmapBuffer(GL_ARRAY_BUFFER);
}
if (unmapResult != GL_TRUE)
{
return gl::Error(GL_OUT_OF_MEMORY, "Failed to unmap the client data streaming buffer.");
}
return gl::Error(GL_NO_ERROR);
}
gl::Error VertexArrayGL::streamAttributes(const gl::AttributesMask &activeAttributesMask,
GLsizei instanceCount,
const gl::IndexRange &indexRange) const
{
// Sync the vertex attribute state and track what data needs to be streamed
size_t streamingDataSize = 0;
size_t maxAttributeDataSize = 0;
computeStreamingAttributeSizes(activeAttributesMask, instanceCount, indexRange,
&streamingDataSize, &maxAttributeDataSize);
if (streamingDataSize == 0)
{
return gl::NoError();
}
if (mStreamingArrayBuffer == 0)
{
mFunctions->genBuffers(1, &mStreamingArrayBuffer);
mStreamingArrayBufferSize = 0;
}
// If first is greater than zero, a slack space needs to be left at the beginning of the buffer
// so that the same 'first' argument can be passed into the draw call.
const size_t bufferEmptySpace = maxAttributeDataSize * indexRange.start;
const size_t requiredBufferSize = streamingDataSize + bufferEmptySpace;
mStateManager->bindBuffer(gl::BufferBinding::Array, mStreamingArrayBuffer);
if (requiredBufferSize > mStreamingArrayBufferSize)
{
mFunctions->bufferData(GL_ARRAY_BUFFER, requiredBufferSize, nullptr, GL_DYNAMIC_DRAW);
mStreamingArrayBufferSize = requiredBufferSize;
}
// Unmapping a buffer can return GL_FALSE to indicate that the system has corrupted the data
// somehow (such as by a screen change), retry writing the data a few times and return
// OUT_OF_MEMORY if that fails.
GLboolean unmapResult = GL_FALSE;
size_t unmapRetryAttempts = 5;
while (unmapResult != GL_TRUE && --unmapRetryAttempts > 0)
{
uint8_t *bufferPointer = MapBufferRangeWithFallback(mFunctions, GL_ARRAY_BUFFER, 0,
requiredBufferSize, GL_MAP_WRITE_BIT);
size_t curBufferOffset = bufferEmptySpace;
const auto &attribs = mState.getVertexAttributes();
const auto &bindings = mState.getVertexBindings();
gl::AttributesMask attribsToStream = (mAttributesNeedStreaming & activeAttributesMask);
for (auto idx : attribsToStream)
{
const auto &attrib = attribs[idx];
ASSERT(IsVertexAttribPointerSupported(idx, attrib));
const auto &binding = bindings[attrib.bindingIndex];
ASSERT(AttributeNeedsStreaming(attrib, binding));
GLuint adjustedDivisor = GetAdjustedDivisor(mAppliedNumViews, binding.getDivisor());
const size_t streamedVertexCount = ComputeVertexBindingElementCount(
adjustedDivisor, indexRange.vertexCount(), instanceCount);
const size_t sourceStride = ComputeVertexAttributeStride(attrib, binding);
const size_t destStride = ComputeVertexAttributeTypeSize(attrib);
// Vertices do not apply the 'start' offset when the divisor is non-zero even when doing
// a non-instanced draw call
const size_t firstIndex = adjustedDivisor == 0 ? indexRange.start : 0;
// Attributes using client memory ignore the VERTEX_ATTRIB_BINDING state.
// https://www.opengl.org/registry/specs/ARB/vertex_attrib_binding.txt
const uint8_t *inputPointer = reinterpret_cast<const uint8_t *>(attrib.pointer);
// Pack the data when copying it, user could have supplied a very large stride that
// would cause the buffer to be much larger than needed.
if (destStride == sourceStride)
{
// Can copy in one go, the data is packed
memcpy(bufferPointer + curBufferOffset, inputPointer + (sourceStride * firstIndex),
destStride * streamedVertexCount);
}
else
{
// Copy each vertex individually
for (size_t vertexIdx = 0; vertexIdx < streamedVertexCount; vertexIdx++)
{
uint8_t *out = bufferPointer + curBufferOffset + (destStride * vertexIdx);
const uint8_t *in = inputPointer + sourceStride * (vertexIdx + firstIndex);
memcpy(out, in, destStride);
}
}
// Compute where the 0-index vertex would be.
const size_t vertexStartOffset = curBufferOffset - (firstIndex * destStride);
callVertexAttribPointer(static_cast<GLuint>(idx), attrib,
static_cast<GLsizei>(destStride),
static_cast<GLintptr>(vertexStartOffset));
curBufferOffset += destStride * streamedVertexCount;
}
unmapResult = mFunctions->unmapBuffer(GL_ARRAY_BUFFER);
}
if (unmapResult != GL_TRUE)
{
return gl::OutOfMemory() << "Failed to unmap the client data streaming buffer.";
}
return gl::NoError();
}
gl::Error VertexDataManager::storeAttribute(const gl::VertexAttribute &attrib,
const gl::VertexAttribCurrentValueData ¤tValue,
TranslatedAttribute *translated,
GLint start,
GLsizei count,
GLsizei instances)
{
gl::Buffer *buffer = attrib.buffer.get();
ASSERT(buffer || attrib.pointer);
BufferD3D *storage = buffer ? GetImplAs<BufferD3D>(buffer) : NULL;
StaticVertexBufferInterface *staticBuffer = storage ? storage->getStaticVertexBufferForAttribute(attrib) : NULL;
VertexBufferInterface *vertexBuffer = staticBuffer ? staticBuffer : static_cast<VertexBufferInterface*>(mStreamingBuffer);
bool directStorage = vertexBuffer->directStoragePossible(attrib, currentValue);
unsigned int streamOffset = 0;
unsigned int outputElementSize = 0;
// Instanced vertices do not apply the 'start' offset
GLint firstVertexIndex = (instances > 0 && attrib.divisor > 0 ? 0 : start);
if (directStorage)
{
outputElementSize = ComputeVertexAttributeStride(attrib);
streamOffset = static_cast<unsigned int>(attrib.offset + outputElementSize * firstVertexIndex);
}
else if (staticBuffer)
{
gl::Error error = staticBuffer->getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
if (error.isError())
{
return error;
}
if (!staticBuffer->lookupAttribute(attrib, &streamOffset))
{
// Convert the entire buffer
int totalCount = ElementsInBuffer(attrib, storage->getSize());
int startIndex = attrib.offset / ComputeVertexAttributeStride(attrib);
error = staticBuffer->storeVertexAttributes(attrib, currentValue, -startIndex, totalCount,
0, &streamOffset);
// Each staticBuffer only contains the data for one attribute, so we know that it won't be modified again.
// We can therefore safely unmap it here without hurting perf.
staticBuffer->getVertexBuffer()->hintUnmapResource();
if (error.isError())
{
return error;
}
}
unsigned int firstElementOffset = (attrib.offset / ComputeVertexAttributeStride(attrib)) * outputElementSize;
unsigned int startOffset = (instances == 0 || attrib.divisor == 0) ? firstVertexIndex * outputElementSize : 0;
if (streamOffset + firstElementOffset + startOffset < streamOffset)
{
return gl::Error(GL_OUT_OF_MEMORY);
}
streamOffset += firstElementOffset + startOffset;
}
else
{
int totalCount = StreamingBufferElementCount(attrib, count, instances);
gl::Error error = mStreamingBuffer->getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
if (error.isError())
{
return error;
}
error = mStreamingBuffer->storeVertexAttributes(attrib, currentValue, firstVertexIndex,
totalCount, instances, &streamOffset);
if (error.isError())
{
return error;
}
}
translated->storage = directStorage ? storage : NULL;
translated->vertexBuffer = vertexBuffer->getVertexBuffer();
translated->serial = directStorage ? storage->getSerial() : vertexBuffer->getSerial();
translated->divisor = attrib.divisor;
translated->attribute = &attrib;
translated->currentValueType = currentValue.Type;
translated->stride = outputElementSize;
translated->offset = streamOffset;
return gl::Error(GL_NO_ERROR);
}
gl::Error VertexDataManager::storeAttribute(const gl::VertexAttribute &attrib,
const gl::VertexAttribCurrentValueData ¤tValue,
TranslatedAttribute *translated,
GLint start,
GLsizei count,
GLsizei instances)
{
gl::Buffer *buffer = attrib.buffer.get();
ASSERT(buffer || attrib.pointer);
BufferD3D *storage = buffer ? BufferD3D::makeBufferD3D(buffer->getImplementation()) : NULL;
StaticVertexBufferInterface *staticBuffer = storage ? storage->getStaticVertexBuffer() : NULL;
VertexBufferInterface *vertexBuffer = staticBuffer ? staticBuffer : static_cast<VertexBufferInterface*>(mStreamingBuffer);
bool directStorage = vertexBuffer->directStoragePossible(attrib, currentValue);
unsigned int streamOffset = 0;
unsigned int outputElementSize = 0;
if (directStorage)
{
outputElementSize = ComputeVertexAttributeStride(attrib);
streamOffset = attrib.offset + outputElementSize * start;
}
else if (staticBuffer)
{
gl::Error error = staticBuffer->getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
if (error.isError())
{
return error;
}
if (!staticBuffer->lookupAttribute(attrib, &streamOffset))
{
// Convert the entire buffer
int totalCount = ElementsInBuffer(attrib, storage->getSize());
int startIndex = attrib.offset / ComputeVertexAttributeStride(attrib);
gl::Error error = staticBuffer->storeVertexAttributes(attrib, currentValue, -startIndex, totalCount,
0, &streamOffset);
if (error.isError())
{
return error;
}
}
unsigned int firstElementOffset = (attrib.offset / ComputeVertexAttributeStride(attrib)) * outputElementSize;
unsigned int startOffset = (instances == 0 || attrib.divisor == 0) ? start * outputElementSize : 0;
if (streamOffset + firstElementOffset + startOffset < streamOffset)
{
return gl::Error(GL_OUT_OF_MEMORY);
}
streamOffset += firstElementOffset + startOffset;
}
else
{
int totalCount = StreamingBufferElementCount(attrib, count, instances);
gl::Error error = mStreamingBuffer->getVertexBuffer()->getSpaceRequired(attrib, 1, 0, &outputElementSize);
if (error.isError())
{
return error;
}
error = mStreamingBuffer->storeVertexAttributes(attrib, currentValue, start, totalCount, instances, &streamOffset);
if (error.isError())
{
return error;
}
}
translated->storage = directStorage ? storage : NULL;
translated->vertexBuffer = vertexBuffer->getVertexBuffer();
translated->serial = directStorage ? storage->getSerial() : vertexBuffer->getSerial();
translated->divisor = attrib.divisor;
translated->attribute = &attrib;
translated->currentValueType = currentValue.Type;
translated->stride = outputElementSize;
translated->offset = streamOffset;
return gl::Error(GL_NO_ERROR);
}
