Convert view manager to surfaces with uploading shim in client lib

mojo/services/public/cpp/view_manager/lib/bitmap_uploader.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 "mojo/services/public/cpp/view_manager/lib/bitmap_uploader.h"
+
+#ifndef GL_GLEXT_PROTOTYPES
+#define GL_GLEXT_PROTOTYPES
+#endif  // GL_GLEXT_PROTOTYPES
+
+#include "base/bind.h"
+#include "cc/surfaces/surface_id.h"
+#include "cc/surfaces/surface_id_allocator.h"
+#include "gpu/GLES2/gl2chromium.h"
+#include "gpu/GLES2/gl2extchromium.h"
+#include "gpu/command_buffer/common/mailbox.h"
+#include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
+#include "mojo/services/public/cpp/surfaces/surfaces_type_converters.h"
+#include "mojo/services/public/cpp/surfaces/surfaces_utils.h"
+#include "third_party/khronos/GLES2/gl2.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace mojo {
+
+namespace {
+void LostContext(void*) {
+  DCHECK(false);
+}
+}
+
+BitmapUploader::BitmapUploader(SurfacesServicePtr surfaces_service,
+                               GpuPtr gpu_service)
+    : surfaces_service_(surfaces_service.Pass()),
+      gpu_service_(gpu_service.Pass()),
+      next_resource_id_(1u),
+      weak_factory_(this) {
+  surfaces_service_->CreateSurfaceConnection(base::Bind(
+      &BitmapUploader::OnSurfaceConnectionCreated, weak_factory_.GetWeakPtr()));
+  CommandBufferPtr gles2_client;
+  gpu_service_->CreateOffscreenGLES2Context(Get(&gles2_client));
+  gles2_context_ =
+      MojoGLES2CreateContext(gles2_client.PassMessagePipe().release().value(),
+                             &LostContext,
+                             NULL,
+                             Environment::GetDefaultAsyncWaiter());
+  MojoGLES2MakeCurrent(gles2_context_);
+}
+
+BitmapUploader::~BitmapUploader() {
+  MojoGLES2DestroyContext(gles2_context_);
+}
+
+void BitmapUploader::OnSurfaceConnectionCreated(SurfacePtr surface,
+                                                uint32_t id_namespace) {
+  surface_ = surface.Pass();
+  surface_.set_client(this);
+  id_allocator_.reset(new cc::SurfaceIdAllocator(id_namespace));
+  if (!bitmap_.isNull()) {
+    Upload(bitmap_, done_callback_);
+    bitmap_.reset();
+    done_callback_.Reset();
+  }
+}
+void BitmapUploader::BindTextureForSize(const gfx::Size size) {
+  // TODO(jamesr): Recycle textures.
+  GLuint texture = 0u;
+  glGenTextures(1, &texture);
+  glBindTexture(GL_TEXTURE_2D, texture);
+  glTexImage2D(GL_TEXTURE_2D,
+               0,
+               GL_RGBA,
+               size.width(),
+               size.height(),
+               0,
+               GL_RGBA,
+               GL_UNSIGNED_BYTE,
+               0);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+}
+
+void BitmapUploader::Upload(
+    SkBitmap bitmap,
+    const base::Callback<void(SurfaceIdPtr)>& done_callback) {
+  if (bitmap.width() == 0 || bitmap.height() == 0) {
+    done_callback.Run(SurfaceId::New());
+    return;
+  }
+  if (!surface_) {  // Can't upload yet, store for later.
+    bitmap_ = bitmap;
+    done_callback_ = done_callback;
+    return;
+  }
+  gfx::Size bitmap_size(bitmap.width(), bitmap.height());
+  if (id_.is_null() || bitmap_size != surface_size_) {
+    if (!id_.is_null())
+      surface_->DestroySurface(SurfaceId::From(id_));
+    id_ = id_allocator_->GenerateId();
+    surface_->CreateSurface(SurfaceId::From(id_), Size::From(bitmap_size));
+    surface_size_ = bitmap_size;
+  }
+
+  BindTextureForSize(bitmap_size);
+  bitmap.lockPixels();
+  glTexSubImage2D(GL_TEXTURE_2D,
+                  0,
+                  0,
+                  0,
+                  bitmap_size.width(),
+                  bitmap_size.height(),
+                  GL_RGBA,
+                  GL_UNSIGNED_BYTE,
+                  bitmap.getPixels());
+  bitmap.unlockPixels();
+
+  gpu::Mailbox mailbox = gpu::Mailbox::Generate();
+  glProduceTextureCHROMIUM(GL_TEXTURE_2D, mailbox.name);
+  GLuint sync_point = glInsertSyncPointCHROMIUM();
+
+  TransferableResourcePtr resource = TransferableResource::New();
+  resource->id = next_resource_id_++;
+  resource->format = mojo::RESOURCE_FORMAT_RGBA_8888;
+  resource->filter = GL_LINEAR;
+  resource->size = Size::From(bitmap_size);
+  MailboxHolderPtr mailbox_holder = MailboxHolder::New();
+  mailbox_holder->mailbox = Mailbox::From(mailbox);
+  mailbox_holder->texture_target = GL_TEXTURE_2D;
+  mailbox_holder->sync_point = sync_point;
+  resource->mailbox_holder = mailbox_holder.Pass();
+  resource->is_repeated = false;
+  resource->is_software = false;
+
+  gfx::Rect bitmap_rect(bitmap_size);
+
+  QuadPtr quad = Quad::New();
+  quad->material = MATERIAL_TEXTURE_CONTENT;
+  quad->rect = Rect::From(bitmap_rect);
+  quad->opaque_rect = Rect::From(bitmap_rect);
+  quad->visible_rect = Rect::From(bitmap_rect);
+  quad->needs_blending = true;
+  quad->shared_quad_state_index = 0u;
+
+  TextureQuadStatePtr texture_state = TextureQuadState::New();
+  texture_state->resource_id = resource->id;
+  texture_state->premultiplied_alpha = true;
+  texture_state->uv_top_left = PointF::From(gfx::PointF(0.f, 0.f));
+  texture_state->uv_bottom_right = PointF::From(gfx::PointF(1.f, 1.f));
+  texture_state->background_color = Color::From(SK_ColorRED);
+  for (int i = 0; i < 4; ++i)
+    texture_state->vertex_opacity.push_back(1.f);
+  texture_state->flipped = false;
+
+  quad->texture_quad_state = texture_state.Pass();
+
+  SharedQuadStatePtr sqs = CreateDefaultSQS(bitmap_size);
+
+  PassPtr pass = CreateDefaultPass(1, bitmap_rect);
+
+  pass->quads.push_back(quad.Pass());
+  pass->shared_quad_states.push_back(sqs.Pass());
+
+  FramePtr frame = Frame::New();
+  frame->resources.push_back(resource.Pass());
+  frame->passes.push_back(pass.Pass());
+
+  surface_->SubmitFrame(SurfaceId::From(id_), frame.Pass());
+  done_callback.Run(SurfaceId::From(id_));
+}
+
+void BitmapUploader::ReturnResources(Array<ReturnedResourcePtr> resources) {
+  // TODO(jamesr): Recycle.
+  for (size_t i = 0; i < resources.size(); ++i) {
+    ReturnedResourcePtr resource = resources[i].Pass();
+    DCHECK_EQ(1, resource->count);
+    glWaitSyncPointCHROMIUM(resource->sync_point);
+    glDeleteTextures(1, &resource->id);
+  }
+}
+
+}  // namespace mojo