Initial import.

1 files changed, 191 insertions, 0 deletions

diff --git a/chromium/gpu/command_buffer/service/renderbuffer_manager.cc b/chromium/gpu/command_buffer/service/renderbuffer_manager.cc
new file mode 100644
index 00000000000..0190c449452
--- /dev/null
+++ b/chromium/gpu/command_buffer/service/renderbuffer_manager.cc
@@ -0,0 +1,191 @@
+// 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/renderbuffer_manager.h"
+#include "base/debug/trace_event.h"
+#include "base/logging.h"
+#include "base/strings/stringprintf.h"
+#include "gpu/command_buffer/common/gles2_cmd_utils.h"
+#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
+#include "gpu/command_buffer/service/memory_tracking.h"
+#include "ui/gl/gl_implementation.h"
+
+namespace gpu {
+namespace gles2 {
+
+RenderbufferManager::RenderbufferManager(
+    MemoryTracker* memory_tracker,
+    GLint max_renderbuffer_size,
+    GLint max_samples)
+    : memory_tracker_(
+          new MemoryTypeTracker(memory_tracker, MemoryTracker::kUnmanaged)),
+      max_renderbuffer_size_(max_renderbuffer_size),
+      max_samples_(max_samples),
+      num_uncleared_renderbuffers_(0),
+      renderbuffer_count_(0),
+      have_context_(true) {
+}
+
+RenderbufferManager::~RenderbufferManager() {
+  DCHECK(renderbuffers_.empty());
+  // If this triggers, that means something is keeping a reference to
+  // a Renderbuffer belonging to this.
+  CHECK_EQ(renderbuffer_count_, 0u);
+
+  DCHECK_EQ(0, num_uncleared_renderbuffers_);
+}
+
+size_t Renderbuffer::EstimatedSize() {
+  uint32 size = 0;
+  RenderbufferManager::ComputeEstimatedRenderbufferSize(
+      width_, height_, samples_, internal_format_, &size);
+  return size;
+}
+
+void Renderbuffer::AddToSignature(
+    std::string* signature) const {
+  DCHECK(signature);
+  *signature += base::StringPrintf(
+      "|Renderbuffer|internal_format=%04x|samples=%d|width=%d|height=%d",
+      internal_format_, samples_, width_, height_);
+}
+
+Renderbuffer::Renderbuffer(RenderbufferManager* manager,
+                           GLuint client_id,
+                           GLuint service_id)
+    : manager_(manager),
+      client_id_(client_id),
+      service_id_(service_id),
+      cleared_(true),
+      has_been_bound_(false),
+      samples_(0),
+      internal_format_(GL_RGBA4),
+      width_(0),
+      height_(0) {
+  manager_->StartTracking(this);
+}
+
+Renderbuffer::~Renderbuffer() {
+  if (manager_) {
+    if (manager_->have_context_) {
+      GLuint id = service_id();
+      glDeleteRenderbuffersEXT(1, &id);
+    }
+    manager_->StopTracking(this);
+    manager_ = NULL;
+  }
+}
+
+void RenderbufferManager::Destroy(bool have_context) {
+  have_context_ = have_context;
+  renderbuffers_.clear();
+  DCHECK_EQ(0u, memory_tracker_->GetMemRepresented());
+}
+
+void RenderbufferManager::StartTracking(Renderbuffer* /* renderbuffer */) {
+  ++renderbuffer_count_;
+}
+
+void RenderbufferManager::StopTracking(Renderbuffer* renderbuffer) {
+  --renderbuffer_count_;
+  if (!renderbuffer->cleared()) {
+    --num_uncleared_renderbuffers_;
+  }
+  memory_tracker_->TrackMemFree(renderbuffer->EstimatedSize());
+}
+
+void RenderbufferManager::SetInfo(
+    Renderbuffer* renderbuffer,
+    GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height) {
+  DCHECK(renderbuffer);
+  if (!renderbuffer->cleared()) {
+    --num_uncleared_renderbuffers_;
+  }
+  memory_tracker_->TrackMemFree(renderbuffer->EstimatedSize());
+  renderbuffer->SetInfo(samples, internalformat, width, height);
+  memory_tracker_->TrackMemAlloc(renderbuffer->EstimatedSize());
+  if (!renderbuffer->cleared()) {
+    ++num_uncleared_renderbuffers_;
+  }
+}
+
+void RenderbufferManager::SetCleared(Renderbuffer* renderbuffer,
+                                     bool cleared) {
+  DCHECK(renderbuffer);
+  if (!renderbuffer->cleared()) {
+    --num_uncleared_renderbuffers_;
+  }
+  renderbuffer->set_cleared(cleared);
+  if (!renderbuffer->cleared()) {
+    ++num_uncleared_renderbuffers_;
+  }
+}
+
+void RenderbufferManager::CreateRenderbuffer(
+    GLuint client_id, GLuint service_id) {
+  scoped_refptr<Renderbuffer> renderbuffer(
+      new Renderbuffer(this, client_id, service_id));
+  std::pair<RenderbufferMap::iterator, bool> result =
+      renderbuffers_.insert(std::make_pair(client_id, renderbuffer));
+  DCHECK(result.second);
+  if (!renderbuffer->cleared()) {
+    ++num_uncleared_renderbuffers_;
+  }
+}
+
+Renderbuffer* RenderbufferManager::GetRenderbuffer(
+    GLuint client_id) {
+  RenderbufferMap::iterator it = renderbuffers_.find(client_id);
+  return it != renderbuffers_.end() ? it->second.get() : NULL;
+}
+
+void RenderbufferManager::RemoveRenderbuffer(GLuint client_id) {
+  RenderbufferMap::iterator it = renderbuffers_.find(client_id);
+  if (it != renderbuffers_.end()) {
+    Renderbuffer* renderbuffer = it->second.get();
+    renderbuffer->MarkAsDeleted();
+    renderbuffers_.erase(it);
+  }
+}
+
+bool RenderbufferManager::ComputeEstimatedRenderbufferSize(
+    int width, int height, int samples, int internal_format, uint32* size) {
+  DCHECK(size);
+
+  uint32 temp = 0;
+  if (!SafeMultiplyUint32(width, height, &temp)) {
+    return false;
+  }
+  if (!SafeMultiplyUint32(temp, samples, &temp)) {
+    return false;
+  }
+  GLenum impl_format = InternalRenderbufferFormatToImplFormat(internal_format);
+  if (!SafeMultiplyUint32(
+      temp, GLES2Util::RenderbufferBytesPerPixel(impl_format), &temp)) {
+    return false;
+  }
+  *size = temp;
+  return true;
+}
+
+GLenum RenderbufferManager::InternalRenderbufferFormatToImplFormat(
+    GLenum impl_format) {
+  if (gfx::GetGLImplementation() != gfx::kGLImplementationEGLGLES2) {
+    switch (impl_format) {
+      case GL_DEPTH_COMPONENT16:
+        return GL_DEPTH_COMPONENT;
+      case GL_RGBA4:
+      case GL_RGB5_A1:
+        return GL_RGBA;
+      case GL_RGB565:
+        return GL_RGB;
+    }
+  }
+  return impl_format;
+}
+
+}  // namespace gles2
+}  // namespace gpu
+
+