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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the definition for resource classes and the resource map.
#ifndef O3D_COMMAND_BUFFER_SERVICE_CROSS_RESOURCE_H_
#define O3D_COMMAND_BUFFER_SERVICE_CROSS_RESOURCE_H_
#include <vector>
#include "base/scoped_ptr.h"
#include "core/cross/types.h"
#include "command_buffer/common/cross/resource.h"
namespace o3d {
namespace command_buffer {
// Base class for resources, just providing a common Destroy function.
class Resource {
public:
Resource() {}
virtual ~Resource() {}
private:
DISALLOW_COPY_AND_ASSIGN(Resource);
};
// VertexBuffer class, representing a vertex buffer resource.
class VertexBuffer: public Resource {
public:
VertexBuffer(unsigned int size, unsigned int flags)
: size_(size),
flags_(flags) {}
virtual ~VertexBuffer() {}
// Returns the vertex buffer flags.
unsigned int flags() const { return flags_; }
// Sets the vertex buffer flags.
void set_flags(unsigned int flags) { flags_ = flags; }
// Returns the vertex buffer size.
unsigned int size() const { return size_; }
// Sets the vertex buffer size.
void set_size(unsigned int size) { size_ = size; }
protected:
unsigned int size_;
unsigned int flags_;
private:
DISALLOW_COPY_AND_ASSIGN(VertexBuffer);
};
// IndexBuffer class, representing an index buffer resource.
class IndexBuffer: public Resource {
public:
IndexBuffer(unsigned int size, unsigned int flags)
: size_(size),
flags_(flags) {}
virtual ~IndexBuffer() {}
// Returns the index buffer flags.
unsigned int flags() const { return flags_; }
// Sets the index buffer flags.
void set_flags(unsigned int flags) { flags_ = flags; }
// Returns the index buffer size.
unsigned int size() const { return size_; }
// Sets the index buffer size.
void set_size(unsigned int size) { size_ = size; }
protected:
unsigned int size_;
unsigned int flags_;
private:
DISALLOW_COPY_AND_ASSIGN(IndexBuffer);
};
// VertexStruct class, representing a vertex struct resource.
class VertexStruct: public Resource {
public:
// The representation of an input data stream.
struct Element {
ResourceID vertex_buffer;
unsigned int offset;
unsigned int stride;
vertex_struct::Type type;
vertex_struct::Semantic semantic;
unsigned int semantic_index;
};
explicit VertexStruct(unsigned int count)
: count_(count),
elements_(new Element[count]) {
memset(elements_.get(), 0, count * sizeof(Element)); // NOLINT
}
// Returns the number of inputs in this struct.
unsigned int count() const { return count_; }
// Returns an element by index.
Element &GetElement(unsigned int i) {
DCHECK_GT(count_, i);
return elements_[i];
}
protected:
unsigned int count_;
scoped_array<Element> elements_;
private:
DISALLOW_COPY_AND_ASSIGN(VertexStruct);
};
// Effect class, representing an effect.
class Effect: public Resource {
public:
Effect() {}
private:
DISALLOW_COPY_AND_ASSIGN(Effect);
};
// EffectParam class, representing an effect parameter.
class EffectParam: public Resource {
public:
explicit EffectParam(effect_param::DataType data_type)
: data_type_(data_type) {
}
// Gets the data type of this parameter.
effect_param::DataType data_type() const { return data_type_; }
private:
effect_param::DataType data_type_;
DISALLOW_COPY_AND_ASSIGN(EffectParam);
};
// Texture class, representing a texture resource.
class Texture: public Resource {
public:
Texture(texture::Type type,
unsigned int levels,
texture::Format format,
bool enable_render_surfaces,
unsigned int flags)
: type_(type),
levels_(levels),
format_(format),
render_surfaces_enabled_(enable_render_surfaces),
flags_(flags) {}
virtual ~Texture() {}
// Returns the type of the texture.
texture::Type type() const { return type_; }
// Returns the texture flags.
unsigned int flags() const { return flags_; }
// Returns the texture format.
texture::Format format() const { return format_; }
// Returns whether the texture supports render surfaces
bool render_surfaces_enabled() const { return render_surfaces_enabled_; }
// Returns the number of mipmap levels in the texture.
unsigned int levels() const { return levels_; }
private:
texture::Type type_;
unsigned int levels_;
texture::Format format_;
bool render_surfaces_enabled_;
unsigned int flags_;
DISALLOW_COPY_AND_ASSIGN(Texture);
};
// RenderSurface class, representing a render surface/target
class RenderSurface: public Resource {
public:
RenderSurface() {}
private:
DISALLOW_COPY_AND_ASSIGN(RenderSurface);
};
// RenderSurface class, representing a render surface/target
class RenderDepthStencilSurface: public Resource {
public:
RenderDepthStencilSurface() {}
private:
DISALLOW_COPY_AND_ASSIGN(RenderDepthStencilSurface);
};
// Texture class, representing a sampler resource.
class Sampler: public Resource {
public:
Sampler() {}
private:
DISALLOW_COPY_AND_ASSIGN(Sampler);
};
// Base of ResourceMap. Contains most of the implementation of ResourceMap, to
// avoid template bloat.
class ResourceMapBase {
public:
ResourceMapBase() : resources_() {}
~ResourceMapBase() {}
// Assigns a resource to a resource ID. Assigning a resource to an ID that
// already has an existing resource will destroy that existing resource. The
// map takes ownership of the resource.
void Assign(ResourceID id, Resource* resource);
// Destroys a resource.
bool Destroy(ResourceID id);
// Destroy all resources.
void DestroyAllResources();
// Gets a resource by ID.
Resource *Get(ResourceID id) {
return (id < resources_.size()) ? resources_[id] : NULL;
}
private:
typedef std::vector<Resource *> Container;
Container resources_;
};
// Resource Map class, allowing resource ID <-> Resource association. This is a
// dense map, optimized for retrieval (O(1)).
template<class T> class ResourceMap {
public:
ResourceMap() : container_() {}
~ResourceMap() {}
// Assigns a resource to a resource ID. Assigning a resource to an ID that
// already has an existing resource will destroy that existing resource. The
// map takes ownership of the resource.
void Assign(ResourceID id, T* resource) {
container_.Assign(id, resource);
}
// Destroys a resource.
bool Destroy(ResourceID id) {
return container_.Destroy(id);
}
// Destroy all resources.
void DestroyAllResources() {
return container_.DestroyAllResources();
}
// Gets a resource by ID.
T *Get(ResourceID id) {
return down_cast<T*>(container_.Get(id));
}
private:
ResourceMapBase container_;
};
} // namespace command_buffer
} // namespace o3d
#endif // O3D_COMMAND_BUFFER_SERVICE_CROSS_RESOURCE_H_
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