cc/quads/render_pass.cc

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/quads/render_pass.h"
   6
   7 #include "base/values.h"
   8 #include "cc/base/math_util.h"
   9 #include "cc/debug/traced_value.h"
  10 #include "cc/output/copy_output_request.h"
  11 #include "cc/quads/draw_quad.h"
  12 #include "cc/quads/render_pass_draw_quad.h"
  13 #include "cc/quads/shared_quad_state.h"
  14
  15 namespace {
  16 const size_t kDefaultNumSharedQuadStatesToReserve = 32;
  17 const size_t kDefaultNumQuadsToReserve = 128;
  18 }
  19
  20 namespace cc {
  21
  22 void* RenderPass::Id::AsTracingId() const {
  23   COMPILE_ASSERT(sizeof(size_t) <= sizeof(void*),  // NOLINT(runtime/sizeof)
  24                  size_t_bigger_than_pointer);
  25   return reinterpret_cast<void*>(base::HashPair(layer_id, index));
  26 }
  27
  28 scoped_ptr<RenderPass> RenderPass::Create() {
  29   return make_scoped_ptr(new RenderPass());
  30 }
  31
  32 scoped_ptr<RenderPass> RenderPass::Create(size_t num_layers) {
  33   return make_scoped_ptr(new RenderPass(num_layers));
  34 }
  35
  36 RenderPass::RenderPass() : id(Id(-1, -1)), has_transparent_background(true) {
  37   shared_quad_state_list.reserve(kDefaultNumSharedQuadStatesToReserve);
  38   quad_list.reserve(kDefaultNumQuadsToReserve);
  39 }
  40
  41 RenderPass::RenderPass(size_t num_layers)
  42     : id(Id(-1, -1)), has_transparent_background(true) {
  43   // Each layer usually produces one shared quad state, so the number of layers
  44   // is a good hint for what to reserve here.
  45   shared_quad_state_list.reserve(num_layers);
  46   quad_list.reserve(kDefaultNumQuadsToReserve);
  47 }
  48
  49 RenderPass::~RenderPass() {
  50   TRACE_EVENT_OBJECT_DELETED_WITH_ID(
  51       TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"),
  52       "cc::RenderPass", id.AsTracingId());
  53 }
  54
  55 scoped_ptr<RenderPass> RenderPass::Copy(Id new_id) const {
  56   scoped_ptr<RenderPass> copy_pass(Create());
  57   copy_pass->SetAll(new_id,
  58                     output_rect,
  59                     damage_rect,
  60                     transform_to_root_target,
  61                     has_transparent_background);
  62   return copy_pass.Pass();
  63 }
  64
  65 // static
  66 void RenderPass::CopyAll(const ScopedPtrVector<RenderPass>& in,
  67                          ScopedPtrVector<RenderPass>* out) {
  68   for (size_t i = 0; i < in.size(); ++i) {
  69     RenderPass* source = in[i];
  70
  71     // Since we can't copy these, it's wrong to use CopyAll in a situation where
  72     // you may have copy_requests present.
  73     DCHECK_EQ(source->copy_requests.size(), 0u);
  74
  75     scoped_ptr<RenderPass> copy_pass(Create());
  76     copy_pass->SetAll(source->id,
  77                       source->output_rect,
  78                       source->damage_rect,
  79                       source->transform_to_root_target,
  80                       source->has_transparent_background);
  81     for (size_t i = 0; i < source->shared_quad_state_list.size(); ++i) {
  82       SharedQuadState* copy_shared_quad_state =
  83           copy_pass->CreateAndAppendSharedQuadState();
  84       copy_shared_quad_state->CopyFrom(source->shared_quad_state_list[i]);
  85     }
  86     for (size_t i = 0, sqs_i = 0; i < source->quad_list.size(); ++i) {
  87       while (source->quad_list[i]->shared_quad_state !=
  88              source->shared_quad_state_list[sqs_i]) {
  89         ++sqs_i;
  90         DCHECK_LT(sqs_i, source->shared_quad_state_list.size());
  91       }
  92       DCHECK(source->quad_list[i]->shared_quad_state ==
  93              source->shared_quad_state_list[sqs_i]);
  94
  95       DrawQuad* quad = source->quad_list[i];
  96
  97       if (quad->material == DrawQuad::RENDER_PASS) {
  98         const RenderPassDrawQuad* pass_quad =
  99             RenderPassDrawQuad::MaterialCast(quad);
 100         copy_pass->quad_list.push_back(
 101             pass_quad->Copy(copy_pass->shared_quad_state_list[sqs_i],
 102                             pass_quad->render_pass_id).PassAs<DrawQuad>());
 103       } else {
 104         copy_pass->quad_list.push_back(source->quad_list[i]->Copy(
 105             copy_pass->shared_quad_state_list[sqs_i]));
 106       }
 107     }
 108     out->push_back(copy_pass.Pass());
 109   }
 110 }
 111
 112 void RenderPass::SetNew(Id id,
 113                         const gfx::Rect& output_rect,
 114                         const gfx::Rect& damage_rect,
 115                         const gfx::Transform& transform_to_root_target) {
 116   DCHECK_GT(id.layer_id, 0);
 117   DCHECK_GE(id.index, 0);
 118   DCHECK(damage_rect.IsEmpty() || output_rect.Contains(damage_rect))
 119       << "damage_rect: " << damage_rect.ToString()
 120       << " output_rect: " << output_rect.ToString();
 121
 122   this->id = id;
 123   this->output_rect = output_rect;
 124   this->damage_rect = damage_rect;
 125   this->transform_to_root_target = transform_to_root_target;
 126
 127   DCHECK(quad_list.empty());
 128   DCHECK(shared_quad_state_list.empty());
 129 }
 130
 131 void RenderPass::SetAll(Id id,
 132                         const gfx::Rect& output_rect,
 133                         const gfx::Rect& damage_rect,
 134                         const gfx::Transform& transform_to_root_target,
 135                         bool has_transparent_background) {
 136   DCHECK_GT(id.layer_id, 0);
 137   DCHECK_GE(id.index, 0);
 138
 139   this->id = id;
 140   this->output_rect = output_rect;
 141   this->damage_rect = damage_rect;
 142   this->transform_to_root_target = transform_to_root_target;
 143   this->has_transparent_background = has_transparent_background;
 144
 145   DCHECK(quad_list.empty());
 146   DCHECK(shared_quad_state_list.empty());
 147 }
 148
 149 scoped_ptr<base::Value> RenderPass::AsValue() const {
 150   scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue());
 151   value->Set("output_rect", MathUtil::AsValue(output_rect).release());
 152   value->Set("damage_rect", MathUtil::AsValue(damage_rect).release());
 153   value->SetBoolean("has_transparent_background", has_transparent_background);
 154   value->SetInteger("copy_requests", copy_requests.size());
 155   scoped_ptr<base::ListValue> shared_states_value(new base::ListValue());
 156   for (size_t i = 0; i < shared_quad_state_list.size(); ++i) {
 157     shared_states_value->Append(shared_quad_state_list[i]->AsValue().release());
 158   }
 159   value->Set("shared_quad_state_list", shared_states_value.release());
 160   scoped_ptr<base::ListValue> quad_list_value(new base::ListValue());
 161   for (size_t i = 0; i < quad_list.size(); ++i) {
 162     quad_list_value->Append(quad_list[i]->AsValue().release());
 163   }
 164   value->Set("quad_list", quad_list_value.release());
 165
 166   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
 167       TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"),
 168       value.get(), "cc::RenderPass", id.AsTracingId());
 169   return value.PassAs<base::Value>();
 170 }
 171
 172 SharedQuadState* RenderPass::CreateAndAppendSharedQuadState() {
 173   shared_quad_state_list.push_back(SharedQuadState::Create());
 174   return shared_quad_state_list.back();
 175 }
 176
 177 }  // namespace cc