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// Copyright 2018 The Amber Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/format.h"
#include "src/make_unique.h"
namespace amber {
Format::Format() = default;
Format::Format(const Format& b) {
type_ = b.type_;
layout_ = b.layout_;
pack_size_in_bytes_ = b.pack_size_in_bytes_;
column_count_ = b.column_count_;
for (const auto& comp : b.components_) {
components_.push_back(
MakeUnique<Component>(comp->type, comp->mode, comp->num_bits));
}
RebuildSegments();
}
Format::~Format() = default;
Format& Format::operator=(const Format& b) {
type_ = b.type_;
layout_ = b.layout_;
pack_size_in_bytes_ = b.pack_size_in_bytes_;
column_count_ = b.column_count_;
for (const auto& comp : b.components_) {
components_.push_back(
MakeUnique<Component>(comp->type, comp->mode, comp->num_bits));
}
RebuildSegments();
return *this;
}
uint32_t Format::SizeInBytes() const {
uint32_t size = 0;
for (const auto& seg : segments_)
size += static_cast<uint32_t>(seg.GetComponent()->SizeInBytes());
return size;
}
bool Format::AreAllComponents(FormatMode mode, uint32_t bits) const {
for (const auto& comp : components_) {
if (comp->mode != mode || comp->num_bits != bits)
return false;
}
return true;
}
bool Format::Equal(const Format* b) const {
if (type_ != b->type_ || layout_ != b->layout_ ||
pack_size_in_bytes_ != b->pack_size_in_bytes_ ||
column_count_ != b->column_count_) {
return false;
}
if (components_.size() != b->components_.size())
return false;
for (uint32_t i = 0; i < components_.size(); ++i) {
if (components_[i]->type != b->components_[i]->type ||
components_[i]->mode != b->components_[i]->mode ||
components_[i]->num_bits != b->components_[i]->num_bits) {
return false;
}
}
return true;
}
uint32_t Format::InputNeededPerElement() const {
uint32_t count = 0;
for (const auto& seg : segments_) {
if (seg.IsPadding())
continue;
count += 1;
}
return count;
}
void Format::AddComponent(FormatComponentType type,
FormatMode mode,
uint8_t bits) {
components_.push_back(MakeUnique<Component>(type, mode, bits));
RebuildSegments();
}
void Format::SetColumnCount(uint32_t c) {
column_count_ = c;
RebuildSegments();
}
void Format::SetLayout(Layout layout) {
layout_ = layout;
RebuildSegments();
}
void Format::RebuildSegments() {
segments_.clear();
for (size_t i = 0; i < column_count_; ++i) {
for (size_t k = 0; k < components_.size(); ++k) {
segments_.push_back(Segment{components_[k].get()});
}
// In std140 a matrix (column count > 1) has each row stored like an array
// which rounds up to a vec4.
//
// In std140 and std430 a vector of size 3N will round up to a vector of 4N.
if ((layout_ == Layout::kStd140 && column_count_ > 1) || RowCount() == 3) {
for (size_t k = 0; k < (4 - RowCount()); ++k) {
// TODO(dsinclair): This component will be wrong if all the components
// aren't the same size. This will be the case when we have struct
// support ....
segments_.push_back(Segment{components_[0].get()});
segments_.back().SetIsPadding();
}
}
}
}
std::string Format::GenerateName() const {
std::string name = "";
std::string parts = "ARGB";
for (const auto& comp : components_) {
name += parts[static_cast<uint8_t>(comp->type)] +
std::to_string(comp->num_bits);
}
name += "_";
switch (components_[0]->mode) {
case FormatMode::kUNorm:
case FormatMode::kUFloat:
case FormatMode::kUScaled:
case FormatMode::kSNorm:
case FormatMode::kSScaled:
case FormatMode::kSRGB:
return "";
case FormatMode::kUInt:
name += "UINT";
break;
case FormatMode::kSInt:
name += "SINT";
break;
case FormatMode::kSFloat:
name += "SFLOAT";
break;
}
return name;
}
} // namespace amber
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