Add calls to EnsureGPUMemoryAvailable into GLES2DecoderImpl

gpu/command_buffer/service/renderbuffer_manager.cc

 // 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/logging.h"
 #include "base/debug/trace_event.h"
 #include "base/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_info_count_(0),
       have_context_(true) {
 }
 
 RenderbufferManager::~RenderbufferManager() {
   DCHECK(renderbuffer_infos_.empty());
   // If this triggers, that means something is keeping a reference to
   // a RenderbufferInfo belonging to this.
   CHECK_EQ(renderbuffer_info_count_, 0u);
 
   DCHECK_EQ(0, num_uncleared_renderbuffers_);
 }
 
 size_t RenderbufferManager::RenderbufferInfo::EstimatedSize() {
-  return width_ * height_ * samples_ *
-         GLES2Util::RenderbufferBytesPerPixel(internal_format_);
+  uint32 size = 0;
+  RenderbufferManager::ComputeEstimatedRenderbufferSize(
+      width_, height_, samples_, internal_format_, &size);
+  return size;
 }
 
 void RenderbufferManager::RenderbufferInfo::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_);
 }
 
@@ skipping 85 matching lines @@
   for (RenderbufferInfoMap::const_iterator it = renderbuffer_infos_.begin();
        it != renderbuffer_infos_.end(); ++it) {
     if (it->second->service_id() == service_id) {
       *client_id = it->first;
       return true;
     }
   }
   return false;
 }
 
+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