Upstream ResourceManager

content/browser/android/resource_manager_impl.cc

+// Copyright 2014 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 "content/browser/android/resource_manager_impl.h"
+
+#include "content/browser/android/ui_resource_android_impl.h"
+#include "content/public/browser/android/ui_resource_provider.h"
+#include "jni/ResourceManager_jni.h"
+#include "ui/gfx/android/java_bitmap.h"
+
+namespace content {
+
+ResourceManager::Resource::Resource() {
+}
+
+ResourceManager::Resource::~Resource() {
+}
+
+gfx::Rect ResourceManager::Resource::Border(const gfx::Size& bounds) {
+  return Border(bounds, gfx::InsetsF(1.f, 1.f, 1.f, 1.f));
+}
+
+gfx::Rect ResourceManager::Resource::Border(const gfx::Size& bounds,
+                                            const gfx::InsetsF& scale) {
+  // Calculate whether or not we need to scale down the border if the bounds of
+  // the layer are going to be smaller than the aperture padding.
+  float x_scale = std::min((float)bounds.width() / size.width(), 1.f);
+  float y_scale = std::min((float)bounds.height() / size.height(), 1.f);
+
+  float left_scale = std::min(x_scale * scale.left(), 1.f);
+  float right_scale = std::min(x_scale * scale.right(), 1.f);
+  float top_scale = std::min(y_scale * scale.top(), 1.f);
+  float bottom_scale = std::min(y_scale * scale.bottom(), 1.f);
+
+  return gfx::Rect(aperture.x() * left_scale, aperture.y() * top_scale,
+                   (size.width() - aperture.width()) * right_scale,
+                   (size.height() - aperture.height()) * bottom_scale);
+}
+
+// static
+ResourceManagerImpl* ResourceManagerImpl::FromJavaObject(jobject jobj) {
+  return reinterpret_cast<ResourceManagerImpl*>(
+      Java_ResourceManager_getNativePtr(base::android::AttachCurrentThread(),
+                                        jobj));
+}
+
+ResourceManagerImpl::ResourceManagerImpl(
+    content::UIResourceProvider* ui_resource_provider)
+    : ui_resource_provider_(ui_resource_provider) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  java_obj_.Reset(env, Java_ResourceManager_create(
+                           env, base::android::GetApplicationContext(),
+                           reinterpret_cast<intptr_t>(this)).obj());
+  DCHECK(!java_obj_.is_null());
+}
+
+ResourceManagerImpl::~ResourceManagerImpl() {
+  Java_ResourceManager_destroy(base::android::AttachCurrentThread(),
+                               java_obj_.obj());
+}
+
+base::android::ScopedJavaLocalRef<jobject> ResourceManagerImpl::GetJavaObject(
+    JNIEnv* env) {
+  return base::android::ScopedJavaLocalRef<jobject>(java_obj_);
+}
+
+ResourceManager::Resource* ResourceManagerImpl::GetResource(
+    ResourceKind res_type,
+    int res_id) {
+  DCHECK_GE(res_type, RESOURCE_KIND_FIRST);
+  DCHECK_LE(res_type, RESOURCE_KIND_LAST);
+
+  Resource* resource = resources_[res_type].Lookup(res_id);
+
+  if (!resource || res_type == RESOURCE_KIND_DYNAMIC ||
+      res_type == RESOURCE_KIND_DYNAMIC_BITMAP) {
+    Java_ResourceManager_resourceRequested(base::android::AttachCurrentThread(),
+                                           java_obj_.obj(), res_type, res_id);
+    resource = resources_[res_type].Lookup(res_id);
+  }
+
+  return resource;
+}
+
+void ResourceManagerImpl::PreloadResource(ResourceKind res_type, int res_id) {
+  DCHECK_GE(res_type, RESOURCE_KIND_FIRST);
+  DCHECK_LE(res_type, RESOURCE_KIND_LAST);
+
+  // Don't send out a query if the resource is already loaded.
+  if (resources_[res_type].Lookup(res_id))
+    return;
+
+  Java_ResourceManager_preloadResource(base::android::AttachCurrentThread(),
+                                       java_obj_.obj(), res_type, res_id);
+}
+
+void ResourceManagerImpl::OnResourceReady(JNIEnv* env,
+                                          jobject jobj,
+                                          jint res_type,
+                                          jint res_id,
+                                          jobject bitmap,
+                                          jint padding_left,
+                                          jint padding_top,
+                                          jint padding_right,
+                                          jint padding_bottom,
+                                          jint aperture_left,
+                                          jint aperture_top,
+                                          jint aperture_right,
+                                          jint aperture_bottom) {
+  DCHECK_GE(res_type, RESOURCE_KIND_FIRST);
+  DCHECK_LE(res_type, RESOURCE_KIND_LAST);
+
+  Resource* resource = resources_[res_type].Lookup(res_id);
+  if (!resource) {
+    resource = new Resource();
+    resources_[res_type].AddWithID(resource, res_id);
+  }
+
+  gfx::JavaBitmap jbitmap(bitmap);
+  resource->size = jbitmap.size();
+  resource->padding.SetRect(padding_left, padding_top,
+                            padding_right - padding_left,
+                            padding_bottom - padding_top);
+  resource->aperture.SetRect(aperture_left, aperture_top,
+                             aperture_right - aperture_left,
+                             aperture_bottom - aperture_top);
+  resource->ui_resource = UIResourceAndroidImpl::CreateFromJavaBitmap(
+      ui_resource_provider_, jbitmap);
+}
+
+// static
+bool ResourceManagerImpl::RegisterResourceManager(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace content