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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "../client/atomicops.h"
#include "../client/share_group.h"
#include "../client/gles2_implementation.h"
#include "../client/program_info_manager.h"
#include "../common/id_allocator.h"
#include "../common/logging.h"
namespace gpu {
namespace gles2 {
COMPILE_ASSERT(gpu::kInvalidResource == 0,
INVALID_RESOURCE_NOT_0_AS_GL_EXPECTS);
// The standard id handler.
class IdHandler : public IdHandlerInterface {
public:
IdHandler() { }
virtual ~IdHandler() { }
// Overridden from IdHandlerInterface.
virtual void Destroy(GLES2Implementation* /* gl_impl */) {
}
// Overridden from IdHandlerInterface.
virtual void MakeIds(
GLES2Implementation* /* gl_impl */,
GLuint id_offset, GLsizei n, GLuint* ids) {
if (id_offset == 0) {
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = id_allocator_.AllocateID();
}
} else {
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = id_allocator_.AllocateIDAtOrAbove(id_offset);
id_offset = ids[ii] + 1;
}
}
}
// Overridden from IdHandlerInterface.
virtual bool FreeIds(
GLES2Implementation* gl_impl,
GLsizei n, const GLuint* ids, DeleteFn delete_fn) {
for (GLsizei ii = 0; ii < n; ++ii) {
id_allocator_.FreeID(ids[ii]);
}
(gl_impl->*delete_fn)(n, ids);
// We need to ensure that the delete call is evaluated on the service side
// before any other contexts issue commands using these client ids.
gl_impl->helper()->CommandBufferHelper::Flush();
return true;
}
// Overridden from IdHandlerInterface.
virtual bool MarkAsUsedForBind(GLuint id) {
return id == 0 ? true : id_allocator_.MarkAsUsed(id);
}
protected:
IdAllocator id_allocator_;
};
// An id handler that require Gen before Bind.
class StrictIdHandler : public IdHandler {
public:
StrictIdHandler() { }
virtual ~StrictIdHandler() { }
// Overridden from IdHandler.
virtual bool MarkAsUsedForBind(GLuint id) {
GPU_DCHECK(id == 0 || id_allocator_.InUse(id));
return IdHandler::MarkAsUsedForBind(id);
}
};
// An id handler for ids that are never reused.
class NonReusedIdHandler : public IdHandlerInterface {
public:
NonReusedIdHandler() : last_id_(0) { }
virtual ~NonReusedIdHandler() { }
// Overridden from IdHandlerInterface.
virtual void Destroy(GLES2Implementation* /* gl_impl */) {
}
// Overridden from IdHandlerInterface.
virtual void MakeIds(
GLES2Implementation* /* gl_impl */,
GLuint id_offset, GLsizei n, GLuint* ids) {
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = ++last_id_ + id_offset;
}
}
// Overridden from IdHandlerInterface.
virtual bool FreeIds(
GLES2Implementation* gl_impl,
GLsizei n, const GLuint* ids, DeleteFn delete_fn) {
// Ids are never freed.
(gl_impl->*delete_fn)(n, ids);
return true;
}
// Overridden from IdHandlerInterface.
virtual bool MarkAsUsedForBind(GLuint /* id */) {
// This is only used for Shaders and Programs which have no bind.
return false;
}
private:
GLuint last_id_;
};
// An id handler for shared ids.
class SharedIdHandler : public IdHandlerInterface {
public:
SharedIdHandler(
id_namespaces::IdNamespaces id_namespace)
: id_namespace_(id_namespace) {
}
virtual ~SharedIdHandler() { }
// Overridden from IdHandlerInterface.
virtual void Destroy(GLES2Implementation* /* gl_impl */) {
}
virtual void MakeIds(
GLES2Implementation* gl_impl,
GLuint id_offset, GLsizei n, GLuint* ids) {
gl_impl->GenSharedIdsCHROMIUM(id_namespace_, id_offset, n, ids);
}
virtual bool FreeIds(
GLES2Implementation* gl_impl,
GLsizei n, const GLuint* ids, DeleteFn delete_fn) {
gl_impl->DeleteSharedIdsCHROMIUM(id_namespace_, n, ids);
(gl_impl->*delete_fn)(n, ids);
// We need to ensure that the delete call is evaluated on the service side
// before any other contexts issue commands using these client ids.
gl_impl->helper()->CommandBufferHelper::Flush();
return true;
}
virtual bool MarkAsUsedForBind(GLuint id) {
// This has no meaning for shared resources.
return true;
}
private:
id_namespaces::IdNamespaces id_namespace_;
};
class ThreadSafeIdHandlerWrapper : public IdHandlerInterface {
public:
ThreadSafeIdHandlerWrapper(IdHandlerInterface* id_handler)
: id_handler_(id_handler) {
}
virtual ~ThreadSafeIdHandlerWrapper() { }
// Overridden from IdHandlerInterface.
virtual void Destroy(GLES2Implementation* gl_impl) {
AutoLock auto_lock(lock_);
id_handler_->Destroy(gl_impl);
}
// Overridden from IdHandlerInterface.
virtual void MakeIds(
GLES2Implementation* gl_impl, GLuint id_offset, GLsizei n, GLuint* ids) {
AutoLock auto_lock(lock_);
id_handler_->MakeIds(gl_impl, id_offset, n, ids);
}
// Overridden from IdHandlerInterface.
virtual bool FreeIds(
GLES2Implementation* gl_impl, GLsizei n, const GLuint* ids,
DeleteFn delete_fn) {
AutoLock auto_lock(lock_);
return id_handler_->FreeIds(gl_impl, n, ids, delete_fn);
}
// Overridden from IdHandlerInterface.
virtual bool MarkAsUsedForBind(GLuint id) {
AutoLock auto_lock(lock_);
return id_handler_->MarkAsUsedForBind(id);
}
private:
IdHandlerInterface* id_handler_;
Lock lock_;
};
ShareGroup::ShareGroup(bool share_resources, bool bind_generates_resource)
: sharing_resources_(share_resources),
bind_generates_resource_(bind_generates_resource),
gles2_(NULL) {
GPU_CHECK(ShareGroup::ImplementsThreadSafeReferenceCounting());
if (bind_generates_resource) {
for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
if (i == id_namespaces::kProgramsAndShaders) {
id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
new NonReusedIdHandler()));
} else {
id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
new IdHandler()));
}
}
} else {
for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
if (i == id_namespaces::kProgramsAndShaders) {
id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
new NonReusedIdHandler()));
} else {
id_handlers_[i].reset(new ThreadSafeIdHandlerWrapper(
new StrictIdHandler()));
}
}
}
program_info_manager_.reset(ProgramInfoManager::Create(false));
}
void ShareGroup::SetGLES2ImplementationForDestruction(
GLES2Implementation* gl_impl) {
gles2_ = gl_impl;
}
ShareGroup::~ShareGroup() {
for (int i = 0; i < id_namespaces::kNumIdNamespaces; ++i) {
id_handlers_[i]->Destroy(gles2_);
id_handlers_[i].reset();
}
}
} // namespace gles2
} // namespace gpu
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