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_tracker.h"
17
18 namespace cc {
19
TextureLayerImpl(LayerTreeImpl * tree_impl,int id)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 uv_top_left_(0.f, 0.f),
27 uv_bottom_right_(1.f, 1.f),
28 own_mailbox_(false),
29 valid_texture_copy_(false) {
30 vertex_opacity_[0] = 1.0f;
31 vertex_opacity_[1] = 1.0f;
32 vertex_opacity_[2] = 1.0f;
33 vertex_opacity_[3] = 1.0f;
34 }
35
~TextureLayerImpl()36 TextureLayerImpl::~TextureLayerImpl() { FreeTextureMailbox(); }
37
SetTextureMailbox(const TextureMailbox & mailbox,scoped_ptr<SingleReleaseCallbackImpl> release_callback)38 void TextureLayerImpl::SetTextureMailbox(
39 const TextureMailbox& mailbox,
40 scoped_ptr<SingleReleaseCallbackImpl> release_callback) {
41 DCHECK_EQ(mailbox.IsValid(), !!release_callback);
42 FreeTextureMailbox();
43 texture_mailbox_ = mailbox;
44 release_callback_ = release_callback.Pass();
45 own_mailbox_ = true;
46 valid_texture_copy_ = false;
47 SetNeedsPushProperties();
48 }
49
CreateLayerImpl(LayerTreeImpl * tree_impl)50 scoped_ptr<LayerImpl> TextureLayerImpl::CreateLayerImpl(
51 LayerTreeImpl* tree_impl) {
52 return TextureLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
53 }
54
PushPropertiesTo(LayerImpl * layer)55 void TextureLayerImpl::PushPropertiesTo(LayerImpl* layer) {
56 LayerImpl::PushPropertiesTo(layer);
57
58 TextureLayerImpl* texture_layer = static_cast<TextureLayerImpl*>(layer);
59 texture_layer->SetFlipped(flipped_);
60 texture_layer->SetUVTopLeft(uv_top_left_);
61 texture_layer->SetUVBottomRight(uv_bottom_right_);
62 texture_layer->SetVertexOpacity(vertex_opacity_);
63 texture_layer->SetPremultipliedAlpha(premultiplied_alpha_);
64 texture_layer->SetBlendBackgroundColor(blend_background_color_);
65 if (own_mailbox_) {
66 texture_layer->SetTextureMailbox(texture_mailbox_,
67 release_callback_.Pass());
68 own_mailbox_ = false;
69 }
70 }
71
WillDraw(DrawMode draw_mode,ResourceProvider * resource_provider)72 bool TextureLayerImpl::WillDraw(DrawMode draw_mode,
73 ResourceProvider* resource_provider) {
74 if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
75 return false;
76
77 if (own_mailbox_) {
78 DCHECK(!external_texture_resource_);
79 if ((draw_mode == DRAW_MODE_HARDWARE && texture_mailbox_.IsTexture()) ||
80 (draw_mode == DRAW_MODE_SOFTWARE &&
81 texture_mailbox_.IsSharedMemory())) {
82 external_texture_resource_ =
83 resource_provider->CreateResourceFromTextureMailbox(
84 texture_mailbox_, release_callback_.Pass());
85 DCHECK(external_texture_resource_);
86 texture_copy_.reset();
87 valid_texture_copy_ = false;
88 }
89 if (external_texture_resource_)
90 own_mailbox_ = false;
91 }
92
93 if (!valid_texture_copy_ && draw_mode == DRAW_MODE_HARDWARE &&
94 texture_mailbox_.IsSharedMemory()) {
95 DCHECK(!external_texture_resource_);
96 // Have to upload a copy to a texture for it to be used in a
97 // hardware draw.
98 if (!texture_copy_)
99 texture_copy_ = ScopedResource::Create(resource_provider);
100 if (texture_copy_->size() != texture_mailbox_.shared_memory_size() ||
101 resource_provider->InUseByConsumer(texture_copy_->id()))
102 texture_copy_->Free();
103
104 if (!texture_copy_->id()) {
105 texture_copy_->Allocate(texture_mailbox_.shared_memory_size(),
106 ResourceProvider::TextureHintImmutable,
107 resource_provider->best_texture_format());
108 }
109
110 if (texture_copy_->id()) {
111 std::vector<uint8> swizzled;
112 uint8* pixels =
113 static_cast<uint8*>(texture_mailbox_.shared_memory()->memory());
114
115 if (!PlatformColor::SameComponentOrder(texture_copy_->format())) {
116 // Swizzle colors. This is slow, but should be really uncommon.
117 size_t bytes = texture_mailbox_.SharedMemorySizeInBytes();
118 swizzled.resize(bytes);
119 for (size_t i = 0; i < bytes; i += 4) {
120 swizzled[i] = pixels[i + 2];
121 swizzled[i + 1] = pixels[i + 1];
122 swizzled[i + 2] = pixels[i];
123 swizzled[i + 3] = pixels[i + 3];
124 }
125 pixels = &swizzled[0];
126 }
127
128 resource_provider->SetPixels(
129 texture_copy_->id(),
130 pixels,
131 gfx::Rect(texture_mailbox_.shared_memory_size()),
132 gfx::Rect(texture_mailbox_.shared_memory_size()),
133 gfx::Vector2d());
134
135 valid_texture_copy_ = true;
136 }
137 }
138 return (external_texture_resource_ || valid_texture_copy_) &&
139 LayerImpl::WillDraw(draw_mode, resource_provider);
140 }
141
AppendQuads(RenderPass * render_pass,const OcclusionTracker<LayerImpl> & occlusion_tracker,AppendQuadsData * append_quads_data)142 void TextureLayerImpl::AppendQuads(
143 RenderPass* render_pass,
144 const OcclusionTracker<LayerImpl>& occlusion_tracker,
145 AppendQuadsData* append_quads_data) {
146 DCHECK(external_texture_resource_ || valid_texture_copy_);
147
148 SharedQuadState* shared_quad_state =
149 render_pass->CreateAndAppendSharedQuadState();
150 PopulateSharedQuadState(shared_quad_state);
151
152 AppendDebugBorderQuad(
153 render_pass, content_bounds(), shared_quad_state, append_quads_data);
154
155 SkColor bg_color = blend_background_color_ ?
156 background_color() : SK_ColorTRANSPARENT;
157 bool opaque = contents_opaque() || (SkColorGetA(bg_color) == 0xFF);
158
159 gfx::Rect quad_rect(content_bounds());
160 gfx::Rect opaque_rect = opaque ? quad_rect : gfx::Rect();
161 gfx::Rect visible_quad_rect =
162 occlusion_tracker.GetCurrentOcclusionForLayer(
163 draw_properties().target_space_transform)
164 .GetUnoccludedContentRect(quad_rect);
165 if (visible_quad_rect.IsEmpty())
166 return;
167
168 TextureDrawQuad* quad =
169 render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
170 ResourceProvider::ResourceId id =
171 valid_texture_copy_ ? texture_copy_->id() : external_texture_resource_;
172 quad->SetNew(shared_quad_state,
173 quad_rect,
174 opaque_rect,
175 visible_quad_rect,
176 id,
177 premultiplied_alpha_,
178 uv_top_left_,
179 uv_bottom_right_,
180 bg_color,
181 vertex_opacity_,
182 flipped_);
183 }
184
VisibleContentOpaqueRegion() const185 SimpleEnclosedRegion TextureLayerImpl::VisibleContentOpaqueRegion() const {
186 if (contents_opaque())
187 return SimpleEnclosedRegion(visible_content_rect());
188
189 if (blend_background_color_ && (SkColorGetA(background_color()) == 0xFF))
190 return SimpleEnclosedRegion(visible_content_rect());
191
192 return SimpleEnclosedRegion();
193 }
194
ReleaseResources()195 void TextureLayerImpl::ReleaseResources() {
196 FreeTextureMailbox();
197 texture_copy_.reset();
198 external_texture_resource_ = 0;
199 valid_texture_copy_ = false;
200 }
201
SetPremultipliedAlpha(bool premultiplied_alpha)202 void TextureLayerImpl::SetPremultipliedAlpha(bool premultiplied_alpha) {
203 premultiplied_alpha_ = premultiplied_alpha;
204 SetNeedsPushProperties();
205 }
206
SetBlendBackgroundColor(bool blend)207 void TextureLayerImpl::SetBlendBackgroundColor(bool blend) {
208 blend_background_color_ = blend;
209 SetNeedsPushProperties();
210 }
211
SetFlipped(bool flipped)212 void TextureLayerImpl::SetFlipped(bool flipped) {
213 flipped_ = flipped;
214 SetNeedsPushProperties();
215 }
216
SetUVTopLeft(const gfx::PointF top_left)217 void TextureLayerImpl::SetUVTopLeft(const gfx::PointF top_left) {
218 uv_top_left_ = top_left;
219 SetNeedsPushProperties();
220 }
221
SetUVBottomRight(const gfx::PointF bottom_right)222 void TextureLayerImpl::SetUVBottomRight(const gfx::PointF bottom_right) {
223 uv_bottom_right_ = bottom_right;
224 SetNeedsPushProperties();
225 }
226
227 // 1--2
228 // | |
229 // 0--3
SetVertexOpacity(const float vertex_opacity[4])230 void TextureLayerImpl::SetVertexOpacity(const float vertex_opacity[4]) {
231 vertex_opacity_[0] = vertex_opacity[0];
232 vertex_opacity_[1] = vertex_opacity[1];
233 vertex_opacity_[2] = vertex_opacity[2];
234 vertex_opacity_[3] = vertex_opacity[3];
235 SetNeedsPushProperties();
236 }
237
LayerTypeAsString() const238 const char* TextureLayerImpl::LayerTypeAsString() const {
239 return "cc::TextureLayerImpl";
240 }
241
FreeTextureMailbox()242 void TextureLayerImpl::FreeTextureMailbox() {
243 if (own_mailbox_) {
244 DCHECK(!external_texture_resource_);
245 if (release_callback_) {
246 release_callback_->Run(texture_mailbox_.sync_point(),
247 false,
248 layer_tree_impl()->BlockingMainThreadTaskRunner());
249 }
250 texture_mailbox_ = TextureMailbox();
251 release_callback_.reset();
252 } else if (external_texture_resource_) {
253 DCHECK(!own_mailbox_);
254 ResourceProvider* resource_provider =
255 layer_tree_impl()->resource_provider();
256 resource_provider->DeleteResource(external_texture_resource_);
257 external_texture_resource_ = 0;
258 }
259 }
260
261 } // namespace cc
262