cc/layers/texture_layer_impl.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/layers/texture_layer_impl.h"
   6
   7 #include <vector>
   8
   9 #include "base/strings/stringprintf.h"
  10 #include "cc/output/renderer.h"
  11 #include "cc/quads/texture_draw_quad.h"
  12 #include "cc/resources/platform_color.h"
  13 #include "cc/resources/scoped_resource.h"
  14 #include "cc/resources/single_release_callback_impl.h"
  15 #include "cc/trees/layer_tree_impl.h"
  16 #include "cc/trees/occlusion.h"
  17
  18 namespace cc {
  19
  20 TextureLayerImpl::TextureLayerImpl(LayerTreeImpl* tree_impl, int id)
  21     : LayerImpl(tree_impl, id),
  22       external_texture_resource_(0),
  23       premultiplied_alpha_(true),
  24       blend_background_color_(false),
  25       flipped_(true),
  26       nearest_neighbor_(false),
  27       uv_top_left_(0.f, 0.f),
  28       uv_bottom_right_(1.f, 1.f),
  29       own_mailbox_(false),
  30       valid_texture_copy_(false) {
  31   vertex_opacity_[0] = 1.0f;
  32   vertex_opacity_[1] = 1.0f;
  33   vertex_opacity_[2] = 1.0f;
  34   vertex_opacity_[3] = 1.0f;
  35 }
  36
  37 TextureLayerImpl::~TextureLayerImpl() { FreeTextureMailbox(); }
  38
  39 void TextureLayerImpl::SetTextureMailbox(
  40     const TextureMailbox& mailbox,
  41     scoped_ptr<SingleReleaseCallbackImpl> release_callback) {
  42   DCHECK_EQ(mailbox.IsValid(), !!release_callback);
  43   FreeTextureMailbox();
  44   texture_mailbox_ = mailbox;
  45   release_callback_ = release_callback.Pass();
  46   own_mailbox_ = true;
  47   valid_texture_copy_ = false;
  48   SetNeedsPushProperties();
  49 }
  50
  51 scoped_ptr<LayerImpl> TextureLayerImpl::CreateLayerImpl(
  52     LayerTreeImpl* tree_impl) {
  53   return TextureLayerImpl::Create(tree_impl, id());
  54 }
  55
  56 void TextureLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  57   LayerImpl::PushPropertiesTo(layer);
  58
  59   TextureLayerImpl* texture_layer = static_cast<TextureLayerImpl*>(layer);
  60   texture_layer->SetFlipped(flipped_);
  61   texture_layer->SetUVTopLeft(uv_top_left_);
  62   texture_layer->SetUVBottomRight(uv_bottom_right_);
  63   texture_layer->SetVertexOpacity(vertex_opacity_);
  64   texture_layer->SetPremultipliedAlpha(premultiplied_alpha_);
  65   texture_layer->SetBlendBackgroundColor(blend_background_color_);
  66   texture_layer->SetNearestNeighbor(nearest_neighbor_);
  67   if (own_mailbox_) {
  68     texture_layer->SetTextureMailbox(texture_mailbox_,
  69                                      release_callback_.Pass());
  70     own_mailbox_ = false;
  71   }
  72 }
  73
  74 bool TextureLayerImpl::WillDraw(DrawMode draw_mode,
  75                                 ResourceProvider* resource_provider) {
  76   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
  77     return false;
  78
  79   if (own_mailbox_) {
  80     DCHECK(!external_texture_resource_);
  81     if ((draw_mode == DRAW_MODE_HARDWARE && texture_mailbox_.IsTexture()) ||
  82         (draw_mode == DRAW_MODE_SOFTWARE &&
  83          texture_mailbox_.IsSharedMemory())) {
  84       external_texture_resource_ =
  85           resource_provider->CreateResourceFromTextureMailbox(
  86               texture_mailbox_, release_callback_.Pass());
  87       DCHECK(external_texture_resource_);
  88       texture_copy_ = nullptr;
  89       valid_texture_copy_ = false;
  90     }
  91     if (external_texture_resource_)
  92       own_mailbox_ = false;
  93   }
  94
  95   if (!valid_texture_copy_ && draw_mode == DRAW_MODE_HARDWARE &&
  96       texture_mailbox_.IsSharedMemory()) {
  97     DCHECK(!external_texture_resource_);
  98     // Have to upload a copy to a texture for it to be used in a
  99     // hardware draw.
 100     if (!texture_copy_)
 101       texture_copy_ = ScopedResource::Create(resource_provider);
 102     if (texture_copy_->size() != texture_mailbox_.shared_memory_size() ||
 103         resource_provider->InUseByConsumer(texture_copy_->id()))
 104       texture_copy_->Free();
 105
 106     if (!texture_copy_->id()) {
 107       texture_copy_->Allocate(texture_mailbox_.shared_memory_size(),
 108                               ResourceProvider::TEXTURE_HINT_IMMUTABLE,
 109                               resource_provider->best_texture_format());
 110     }
 111
 112     if (texture_copy_->id()) {
 113       std::vector<uint8> swizzled;
 114       uint8* pixels = texture_mailbox_.shared_bitmap()->pixels();
 115
 116       if (!PlatformColor::SameComponentOrder(texture_copy_->format())) {
 117         // Swizzle colors. This is slow, but should be really uncommon.
 118         size_t bytes = texture_mailbox_.SharedMemorySizeInBytes();
 119         swizzled.resize(bytes);
 120         for (size_t i = 0; i < bytes; i += 4) {
 121           swizzled[i] = pixels[i + 2];
 122           swizzled[i + 1] = pixels[i + 1];
 123           swizzled[i + 2] = pixels[i];
 124           swizzled[i + 3] = pixels[i + 3];
 125         }
 126         pixels = &swizzled[0];
 127       }
 128
 129       resource_provider->SetPixels(
 130           texture_copy_->id(),
 131           pixels,
 132           gfx::Rect(texture_mailbox_.shared_memory_size()),
 133           gfx::Rect(texture_mailbox_.shared_memory_size()),
 134           gfx::Vector2d());
 135
 136       valid_texture_copy_ = true;
 137     }
 138   }
 139   return (external_texture_resource_ || valid_texture_copy_) &&
 140          LayerImpl::WillDraw(draw_mode, resource_provider);
 141 }
 142
 143 void TextureLayerImpl::AppendQuads(RenderPass* render_pass,
 144                                    AppendQuadsData* append_quads_data) {
 145   DCHECK(external_texture_resource_ || valid_texture_copy_);
 146
 147   SharedQuadState* shared_quad_state =
 148       render_pass->CreateAndAppendSharedQuadState();
 149   PopulateSharedQuadState(shared_quad_state);
 150
 151   AppendDebugBorderQuad(
 152       render_pass, content_bounds(), shared_quad_state, append_quads_data);
 153
 154   SkColor bg_color = blend_background_color_ ?
 155       background_color() : SK_ColorTRANSPARENT;
 156   bool opaque = contents_opaque() || (SkColorGetA(bg_color) == 0xFF);
 157
 158   gfx::Rect quad_rect(content_bounds());
 159   gfx::Rect opaque_rect = opaque ? quad_rect : gfx::Rect();
 160   gfx::Rect visible_quad_rect =
 161       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 162           quad_rect);
 163   if (visible_quad_rect.IsEmpty())
 164     return;
 165
 166   TextureDrawQuad* quad =
 167       render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 168   ResourceProvider::ResourceId id =
 169       valid_texture_copy_ ? texture_copy_->id() : external_texture_resource_;
 170   quad->SetNew(shared_quad_state,
 171                quad_rect,
 172                opaque_rect,
 173                visible_quad_rect,
 174                id,
 175                premultiplied_alpha_,
 176                uv_top_left_,
 177                uv_bottom_right_,
 178                bg_color,
 179                vertex_opacity_,
 180                flipped_,
 181                nearest_neighbor_);
 182 }
 183
 184 SimpleEnclosedRegion TextureLayerImpl::VisibleContentOpaqueRegion() const {
 185   if (contents_opaque())
 186     return SimpleEnclosedRegion(visible_content_rect());
 187
 188   if (blend_background_color_ && (SkColorGetA(background_color()) == 0xFF))
 189     return SimpleEnclosedRegion(visible_content_rect());
 190
 191   return SimpleEnclosedRegion();
 192 }
 193
 194 void TextureLayerImpl::ReleaseResources() {
 195   FreeTextureMailbox();
 196   texture_copy_ = nullptr;
 197   external_texture_resource_ = 0;
 198   valid_texture_copy_ = false;
 199 }
 200
 201 void TextureLayerImpl::SetPremultipliedAlpha(bool premultiplied_alpha) {
 202   premultiplied_alpha_ = premultiplied_alpha;
 203   SetNeedsPushProperties();
 204 }
 205
 206 void TextureLayerImpl::SetBlendBackgroundColor(bool blend) {
 207   blend_background_color_ = blend;
 208   SetNeedsPushProperties();
 209 }
 210
 211 void TextureLayerImpl::SetFlipped(bool flipped) {
 212   flipped_ = flipped;
 213   SetNeedsPushProperties();
 214 }
 215
 216 void TextureLayerImpl::SetNearestNeighbor(bool nearest_neighbor) {
 217   nearest_neighbor_ = nearest_neighbor;
 218   SetNeedsPushProperties();
 219 }
 220
 221 void TextureLayerImpl::SetUVTopLeft(const gfx::PointF top_left) {
 222   uv_top_left_ = top_left;
 223   SetNeedsPushProperties();
 224 }
 225
 226 void TextureLayerImpl::SetUVBottomRight(const gfx::PointF bottom_right) {
 227   uv_bottom_right_ = bottom_right;
 228   SetNeedsPushProperties();
 229 }
 230
 231 // 1--2
 232 // |  |
 233 // 0--3
 234 void TextureLayerImpl::SetVertexOpacity(const float vertex_opacity[4]) {
 235   vertex_opacity_[0] = vertex_opacity[0];
 236   vertex_opacity_[1] = vertex_opacity[1];
 237   vertex_opacity_[2] = vertex_opacity[2];
 238   vertex_opacity_[3] = vertex_opacity[3];
 239   SetNeedsPushProperties();
 240 }
 241
 242 const char* TextureLayerImpl::LayerTypeAsString() const {
 243   return "cc::TextureLayerImpl";
 244 }
 245
 246 void TextureLayerImpl::FreeTextureMailbox() {
 247   if (own_mailbox_) {
 248     DCHECK(!external_texture_resource_);
 249     if (release_callback_) {
 250       release_callback_->Run(texture_mailbox_.sync_point(),
 251                              false,
 252                              layer_tree_impl()->BlockingMainThreadTaskRunner());
 253     }
 254     texture_mailbox_ = TextureMailbox();
 255     release_callback_ = nullptr;
 256   } else if (external_texture_resource_) {
 257     DCHECK(!own_mailbox_);
 258     ResourceProvider* resource_provider =
 259         layer_tree_impl()->resource_provider();
 260     resource_provider->DeleteResource(external_texture_resource_);
 261     external_texture_resource_ = 0;
 262   }
 263 }
 264
 265 }  // namespace cc