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Unified Diff: gpu/command_buffer/service/mailbox_manager.cc

Issue 10106015: Allow textures to be moved from one GL context group to another. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 8 years, 8 months ago
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Index: gpu/command_buffer/service/mailbox_manager.cc
===================================================================
--- gpu/command_buffer/service/mailbox_manager.cc (revision 0)
+++ gpu/command_buffer/service/mailbox_manager.cc (revision 0)
@@ -0,0 +1,125 @@
+// 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 "gpu/command_buffer/service/mailbox_manager.h"
+
+#include "base/rand_util.h"
+#include "crypto/hmac.h"
+#include "gpu/command_buffer/service/gl_utils.h"
+#include "gpu/command_buffer/service/texture_definition.h"
+
+namespace gpu {
+namespace gles2 {
+
+MailboxManager::MailboxManager()
+ : hmac_(crypto::HMAC::SHA256),
+ textures_(std::ptr_fun(&MailboxManager::TargetNameLess)) {
+ unsigned char private_key[GL_MAILBOX_SIZE_CHROMIUM / 2];
+ base::RandBytes(private_key, sizeof(private_key));
+ bool success = hmac_.Init(private_key, sizeof(private_key));
+ DCHECK(success);
+}
+
+MailboxManager::~MailboxManager() {
+}
+
+void MailboxManager::GenerateMailboxName(MailboxName* name) {
+ base::RandBytes(name->key, sizeof(name->key));
+ SignMailboxName(name);
+}
+
+TextureDefinition* MailboxManager::ConsumeTexture(unsigned target,
+ const MailboxName& name) {
+ if (!IsMailboxNameValid(name))
+ return NULL;
+
+ TextureDefinitionMap::iterator it =
+ textures_.find(TargetName(target, name));
+ if (it == textures_.end()) {
+ NOTREACHED();
+ return NULL;
+ }
+
+ TextureDefinition* definition = it->second.definition.release();
+ textures_.erase(it);
+
+ return definition;
+}
+
+bool MailboxManager::ProduceTexture(unsigned target,
+ const MailboxName& name,
+ TextureDefinition* definition,
+ TextureManager* owner) {
+ if (!IsMailboxNameValid(name))
+ return false;
+
+ TextureDefinitionMap::iterator it =
+ textures_.find(TargetName(target, name));
+ if (it != textures_.end()) {
+ NOTREACHED();
+ GLuint service_id = it->second.definition->ReleaseServiceId();
+ glDeleteTextures(1, &service_id);
+ it->second = OwnedTextureDefinition(definition, owner);
+ } else {
+ textures_.insert(std::make_pair(
+ TargetName(target, name),
+ OwnedTextureDefinition(definition, owner)));
+ }
+
+ return true;
+}
+
+void MailboxManager::DestroyOwnedTextures(TextureManager* owner,
+ bool have_context) {
+ TextureDefinitionMap::iterator it = textures_.begin();
+ while (it != textures_.end()) {
+ TextureDefinitionMap::iterator current_it = it;
+ ++it;
+ if (current_it->second.owner == owner) {
+ NOTREACHED();
+ GLuint service_id = current_it->second.definition->ReleaseServiceId();
+ if (have_context)
+ glDeleteTextures(1, &service_id);
+ textures_.erase(current_it);
+ }
+ }
+}
+
+void MailboxManager::SignMailboxName(MailboxName* name) {
+ bool success = hmac_.Sign(
+ base::StringPiece(reinterpret_cast<char*>(name->key), sizeof(name->key)),
+ reinterpret_cast<unsigned char*>(name->signature),
+ sizeof(name->signature));
+ DCHECK(success);
+}
+
+bool MailboxManager::IsMailboxNameValid(const MailboxName& name) {
+ return hmac_.Verify(
+ base::StringPiece(reinterpret_cast<const char*>(name.key),
+ sizeof(name.key)),
+ base::StringPiece(reinterpret_cast<const char*>(name.signature),
+ sizeof(name.signature)));
+}
+
+MailboxManager::TargetName::TargetName(unsigned target, const MailboxName& name)
+ : target(target),
+ name(name) {
+}
+
+bool MailboxManager::TargetNameLess(MailboxManager::TargetName lhs,
+ MailboxManager::TargetName rhs) {
+ return memcmp(&lhs, &rhs, sizeof(lhs)) < 0;
+}
+
+MailboxManager::OwnedTextureDefinition::OwnedTextureDefinition(
+ TextureDefinition* definition,
+ TextureManager* owner)
+ : definition(definition),
+ owner(owner) {
+}
+
+MailboxManager::OwnedTextureDefinition::~OwnedTextureDefinition() {
+}
+} // namespace gles2
+} // namespace gpu
Property changes on: gpu\command_buffer\service\mailbox_manager.cc
___________________________________________________________________
Added: svn:eol-style
+ LF
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