Part 10 of cc/ directory shuffles: layers

cc/io_surface_layer_impl.cc

-// Copyright 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 "cc/io_surface_layer_impl.h"
-
-#include "base/stringprintf.h"
-#include "cc/output/gl_renderer.h"  // For the GLC() macro.
-#include "cc/output/output_surface.h"
-#include "cc/quad_sink.h"
-#include "cc/quads/io_surface_draw_quad.h"
-#include "cc/trees/layer_tree_impl.h"
-#include "gpu/GLES2/gl2extchromium.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
-#include "third_party/khronos/GLES2/gl2.h"
-#include "third_party/khronos/GLES2/gl2ext.h"
-
-namespace cc {
-
-IOSurfaceLayerImpl::IOSurfaceLayerImpl(LayerTreeImpl* tree_impl, int id)
-    : LayerImpl(tree_impl, id),
-      io_surface_id_(0),
-      io_surface_changed_(false),
-      io_surface_texture_id_(0) {}
-
-IOSurfaceLayerImpl::~IOSurfaceLayerImpl() {
-  if (!io_surface_texture_id_)
-    return;
-
-  OutputSurface* output_surface = layer_tree_impl()->output_surface();
-  // FIXME: Implement this path for software compositing.
-  WebKit::WebGraphicsContext3D* context3d = output_surface->context3d();
-  if (context3d)
-    context3d->deleteTexture(io_surface_texture_id_);
-}
-
-scoped_ptr<LayerImpl> IOSurfaceLayerImpl::CreateLayerImpl(
-    LayerTreeImpl* tree_impl) {
-  return IOSurfaceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
-}
-
-void IOSurfaceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
-  LayerImpl::PushPropertiesTo(layer);
-
-  IOSurfaceLayerImpl* io_surface_layer =
-      static_cast<IOSurfaceLayerImpl*>(layer);
-  io_surface_layer->SetIOSurfaceProperties(io_surface_id_, io_surface_size_);
-}
-
-void IOSurfaceLayerImpl::WillDraw(ResourceProvider* resource_provider) {
-  LayerImpl::WillDraw(resource_provider);
-
-  if (io_surface_changed_) {
-    WebKit::WebGraphicsContext3D* context3d =
-        resource_provider->GraphicsContext3D();
-    if (!context3d) {
-      // FIXME: Implement this path for software compositing.
-      return;
-    }
-
-    // FIXME: Do this in a way that we can track memory usage.
-    if (!io_surface_texture_id_)
-      io_surface_texture_id_ = context3d->createTexture();
-
-    GLC(context3d, context3d->activeTexture(GL_TEXTURE0));
-    GLC(context3d,
-        context3d->bindTexture(GL_TEXTURE_RECTANGLE_ARB,
-                               io_surface_texture_id_));
-    GLC(context3d,
-        context3d->texParameteri(
-            GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
-    GLC(context3d,
-        context3d->texParameteri(
-            GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
-    GLC(context3d,
-        context3d->texParameteri(
-            GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
-    GLC(context3d,
-        context3d->texParameteri(
-            GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
-    context3d->texImageIOSurface2DCHROMIUM(GL_TEXTURE_RECTANGLE_ARB,
-                                           io_surface_size_.width(),
-                                           io_surface_size_.height(),
-                                           io_surface_id_,
-                                           0);
-    // Do not check for error conditions. texImageIOSurface2DCHROMIUM is
-    // supposed to hold on to the last good IOSurface if the new one is already
-    // closed. This is only a possibility during live resizing of plugins.
-    // However, it seems that this is not sufficient to completely guard against
-    // garbage being drawn. If this is found to be a significant issue, it may
-    // be necessary to explicitly tell the embedder when to free the surfaces it
-    // has allocated.
-    io_surface_changed_ = false;
-  }
-}
-
-void IOSurfaceLayerImpl::AppendQuads(QuadSink* quad_sink,
-                                     AppendQuadsData* append_quads_data) {
-  SharedQuadState* shared_quad_state =
-      quad_sink->UseSharedQuadState(CreateSharedQuadState());
-  AppendDebugBorderQuad(quad_sink, shared_quad_state, append_quads_data);
-
-  gfx::Rect quad_rect(gfx::Point(), content_bounds());
-  gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
-  scoped_ptr<IOSurfaceDrawQuad> quad = IOSurfaceDrawQuad::Create();
-  quad->SetNew(shared_quad_state,
-               quad_rect,
-               opaque_rect,
-               io_surface_size_,
-               io_surface_texture_id_,
-               IOSurfaceDrawQuad::FLIPPED);
-  quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
-}
-
-void IOSurfaceLayerImpl::DumpLayerProperties(std::string* str,
-                                             int indent) const {
-  str->append(IndentString(indent));
-  base::StringAppendF(str,
-                      "iosurface id: %u texture id: %u\n",
-                      io_surface_id_,
-                      io_surface_texture_id_);
-  LayerImpl::DumpLayerProperties(str, indent);
-}
-
-void IOSurfaceLayerImpl::DidLoseOutputSurface() {
-  // We don't have a valid texture ID in the new context; however,
-  // the IOSurface is still valid.
-  io_surface_texture_id_ = 0;
-  io_surface_changed_ = true;
-}
-
-void IOSurfaceLayerImpl::SetIOSurfaceProperties(unsigned io_surface_id,
-                                                gfx::Size size) {
-  if (io_surface_id_ != io_surface_id)
-    io_surface_changed_ = true;
-
-  io_surface_id_ = io_surface_id;
-  io_surface_size_ = size;
-}
-
-const char* IOSurfaceLayerImpl::LayerTypeAsString() const {
-  return "IOSurfaceLayer";
-}
-
-}  // namespace cc