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// Copyright 2016 The Cobalt Authors. All Rights Reserved.
//
// 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.
#ifndef COBALT_CSSOM_MAP_TO_MESH_FUNCTION_H_
#define COBALT_CSSOM_MAP_TO_MESH_FUNCTION_H_
#include <memory>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "cobalt/base/polymorphic_equatable.h"
#include "cobalt/cssom/filter_function.h"
#include "cobalt/cssom/keyword_value.h"
#include "cobalt/cssom/property_value.h"
#include "cobalt/cssom/url_value.h"
#include "third_party/glm/glm/mat4x4.hpp"
namespace cobalt {
namespace cssom {
// Represent a map-to-mesh filter.
class MapToMeshFunction : public FilterFunction {
public:
// A resolution-matched mesh specifier.
class ResolutionMatchedMesh {
public:
ResolutionMatchedMesh(int width_match, int height_match,
const scoped_refptr<PropertyValue>& mesh_url);
int width_match() const { return width_match_; }
int height_match() const { return height_match_; }
const scoped_refptr<PropertyValue>& mesh_url() const { return mesh_url_; }
bool operator==(const MapToMeshFunction::ResolutionMatchedMesh& rhs) const;
bool operator!=(const MapToMeshFunction::ResolutionMatchedMesh& rhs) const;
private:
const int width_match_;
const int height_match_;
const scoped_refptr<PropertyValue> mesh_url_;
};
// Type of the source of the mesh: either a built-in mesh type or a custom
// mesh.
enum MeshSpecType {
// Built-in rectangular mesh.
kRectangular,
// Built-in equirectangular mesh.
kEquirectangular,
// List of custom binary mesh URLs.
kUrls
};
typedef std::vector<std::unique_ptr<ResolutionMatchedMesh>>
ResolutionMatchedMeshListBuilder;
// Contains the specification of the mesh source.
class MeshSpec {
public:
explicit MeshSpec(MeshSpecType mesh_type) : mesh_type_(mesh_type) {
// Check that this is a built-in mesh type.
DCHECK(mesh_type == kRectangular || mesh_type == kEquirectangular);
}
MeshSpec(MeshSpecType mesh_type,
const scoped_refptr<PropertyValue>& mesh_url,
ResolutionMatchedMeshListBuilder resolution_matched_meshes)
: mesh_type_(mesh_type),
mesh_url_(mesh_url),
resolution_matched_meshes_(std::move(resolution_matched_meshes)) {
DCHECK_EQ(mesh_type_, kUrls);
DCHECK(mesh_url);
}
const scoped_refptr<PropertyValue>& mesh_url() const {
DCHECK_EQ(mesh_type_, kUrls);
return mesh_url_;
}
const ResolutionMatchedMeshListBuilder& resolution_matched_meshes() const {
DCHECK_EQ(mesh_type_, kUrls);
return resolution_matched_meshes_;
}
MeshSpecType mesh_type() const { return mesh_type_; }
private:
MeshSpecType mesh_type_;
scoped_refptr<PropertyValue> mesh_url_;
ResolutionMatchedMeshListBuilder resolution_matched_meshes_;
DISALLOW_COPY_AND_ASSIGN(MeshSpec);
};
MapToMeshFunction(std::unique_ptr<MeshSpec> mesh_spec,
float horizontal_fov_in_radians,
float vertical_fov_in_radians, const glm::mat4& transform,
const scoped_refptr<KeywordValue>& stereo_mode)
: mesh_spec_(std::move(mesh_spec)),
horizontal_fov_in_radians_(horizontal_fov_in_radians),
vertical_fov_in_radians_(vertical_fov_in_radians),
transform_(transform),
stereo_mode_(stereo_mode) {
DCHECK(mesh_spec_);
DCHECK_NE(mesh_spec_->mesh_type(), kRectangular);
DCHECK(stereo_mode_);
}
// Alternate constructor for mesh URL lists.
MapToMeshFunction(const scoped_refptr<PropertyValue>& mesh_url,
ResolutionMatchedMeshListBuilder resolution_matched_meshes,
float horizontal_fov_in_radians,
float vertical_fov_in_radians, const glm::mat4& transform,
const scoped_refptr<KeywordValue>& stereo_mode)
: mesh_spec_(new MeshSpec(kUrls, mesh_url,
std::move(resolution_matched_meshes))),
horizontal_fov_in_radians_(horizontal_fov_in_radians),
vertical_fov_in_radians_(vertical_fov_in_radians),
transform_(transform),
stereo_mode_(stereo_mode) {
DCHECK(stereo_mode_);
}
// Alternate constructor for built-in meshes.
MapToMeshFunction(MeshSpecType spec_type, float horizontal_fov_in_radians,
float vertical_fov_in_radians, const glm::mat4& transform,
const scoped_refptr<KeywordValue>& stereo_mode)
: mesh_spec_(new MeshSpec(spec_type)),
horizontal_fov_in_radians_(horizontal_fov_in_radians),
vertical_fov_in_radians_(vertical_fov_in_radians),
transform_(transform),
stereo_mode_(stereo_mode) {
DCHECK_NE(spec_type, kRectangular);
DCHECK(stereo_mode_);
}
// Alternate constructor for built-in meshes without FOV or transforms.
MapToMeshFunction(MeshSpecType spec_type,
const scoped_refptr<KeywordValue>& stereo_mode)
: mesh_spec_(new MeshSpec(spec_type)),
horizontal_fov_in_radians_(0.0f),
vertical_fov_in_radians_(0.0f),
transform_(glm::mat4()),
stereo_mode_(stereo_mode) {
DCHECK_EQ(spec_type, kRectangular);
DCHECK(stereo_mode_);
}
~MapToMeshFunction() override {}
const MeshSpec& mesh_spec() const { return *mesh_spec_; }
float horizontal_fov_in_radians() const { return horizontal_fov_in_radians_; }
float vertical_fov_in_radians() const { return vertical_fov_in_radians_; }
const glm::mat4& transform() const { return transform_; }
const scoped_refptr<KeywordValue>& stereo_mode() const {
return stereo_mode_;
}
std::string ToString() const override;
bool operator==(const MapToMeshFunction& rhs) const;
static const MapToMeshFunction* ExtractFromFilterList(
PropertyValue* filter_list);
DEFINE_POLYMORPHIC_EQUATABLE_TYPE(MapToMeshFunction);
private:
const std::unique_ptr<MeshSpec> mesh_spec_;
const float horizontal_fov_in_radians_;
const float vertical_fov_in_radians_;
const glm::mat4 transform_;
const scoped_refptr<KeywordValue> stereo_mode_;
DISALLOW_COPY_AND_ASSIGN(MapToMeshFunction);
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_MAP_TO_MESH_FUNCTION_H_