| Flutter Impeller |

entity_playground.cc
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1 // Copyright 2013 The Flutter 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 "impeller/entity/entity_playground.h"
6
7 #include "impeller/entity/contents/content_context.h"
8 #include "impeller/typographer/backends/skia/typographer_context_skia.h"
9 #include "third_party/imgui/imgui.h"
10
11 namespace impeller {
12
13 EntityPlayground::EntityPlayground()
14 : typographer_context_(TypographerContextSkia::Make()) {}
15
16 EntityPlayground::~EntityPlayground() = default;
17
18 void EntityPlayground::SetTypographerContext(
19 std::shared_ptr<TypographerContext> typographer_context) {
20 typographer_context_ = std::move(typographer_context);
21 }
22
23 bool EntityPlayground::OpenPlaygroundHere(EntityPass& entity_pass) {
24 if (!switches_.enable_playground) {
25 return true;
26 }
27
28 ContentContext content_context(GetContext(), typographer_context_);
29 if (!content_context.IsValid()) {
30 return false;
31 }
32
33 // Resolve any lingering tracked clips by assigning an arbitrarily high
34 // number. The number to assign just needs to be at least as high as larger
35 // any previously assigned clip depth in the scene. Normally, Aiks handles
36 // this correctly when wrapping up the base pass as an `impeller::Picture`.
37 entity_pass.PopAllClips(99999);
38
39 auto callback = [&](RenderTarget& render_target) -> bool {
40 return entity_pass.Render(content_context, render_target);
41 };
42 return Playground::OpenPlaygroundHere(callback);
43 }
44
45 std::shared_ptr<ContentContext> EntityPlayground::GetContentContext() const {
46 return std::make_shared<ContentContext>(GetContext(), typographer_context_);
47 }
48
49 bool EntityPlayground::OpenPlaygroundHere(Entity entity) {
50 if (!switches_.enable_playground) {
51 return true;
52 }
53
54 auto content_context = GetContentContext();
55 if (!content_context->IsValid()) {
56 return false;
57 }
58 SinglePassCallback callback = [&](RenderPass& pass) -> bool {
59 content_context->GetRenderTargetCache()->Start();
60 bool result = entity.Render(*content_context, pass);
61 content_context->GetRenderTargetCache()->End();
62 content_context->GetTransientsBuffer().Reset();
63 return result;
64 };
65 return Playground::OpenPlaygroundHere(callback);
66 }
67
68 bool EntityPlayground::OpenPlaygroundHere(EntityPlaygroundCallback callback) {
69 if (!switches_.enable_playground) {
70 return true;
71 }
72
73 ContentContext content_context(GetContext(), typographer_context_);
74 if (!content_context.IsValid()) {
75 return false;
76 }
77 SinglePassCallback pass_callback = [&](RenderPass& pass) -> bool {
78 static bool wireframe = false;
79 if (ImGui::IsKeyPressed(ImGuiKey_Z)) {
80 wireframe = !wireframe;
81 content_context.SetWireframe(wireframe);
82 }
83 content_context.GetRenderTargetCache()->Start();
84 bool result = callback(content_context, pass);
85 content_context.GetRenderTargetCache()->End();
86 content_context.GetTransientsBuffer().Reset();
87 return result;
88 };
89 return Playground::OpenPlaygroundHere(pass_callback);
90 }
91
92 } // namespace impeller
impeller::EntityPass::PopAllClips
void PopAllClips(uint64_t depth)
Definition: entity_pass.cc:135
impeller::EntityPlayground::~EntityPlayground
~EntityPlayground()
typographer_context_skia.h
impeller::Entity
Definition: entity.h:20
impeller::Entity::Render
bool Render(const ContentContext &renderer, RenderPass &parent_pass) const
Definition: entity.cc:173
impeller::EntityPass
Definition: entity_pass.h:43
impeller::Playground::switches_
const PlaygroundSwitches switches_
Definition: playground.h:118
impeller::RenderTarget
Definition: render_target.h:38
impeller::TypographerContextSkia
Definition: typographer_context_skia.h:12
impeller::Playground::SinglePassCallback
std::function< bool(RenderPass &pass)> SinglePassCallback
Definition: playground.h:50
impeller::RenderPass
Render passes encode render commands directed as one specific render target into an underlying comman...
Definition: render_pass.h:33
content_context.h
impeller::ContentContext::GetRenderTargetCache
const std::shared_ptr< RenderTargetAllocator > & GetRenderTargetCache() const
Definition: content_context.h:724
impeller::EntityPlayground::OpenPlaygroundHere
bool OpenPlaygroundHere(Entity entity)
Definition: entity_playground.cc:49
impeller::HostBuffer::Reset
void Reset()
Resets the contents of the HostBuffer to nothing so it can be reused.
Definition: host_buffer.cc:195
impeller::EntityPass::Render
bool Render(ContentContext &renderer, const RenderTarget &render_target) const
Definition: entity_pass.cc:354
impeller::ContentContext::SetWireframe
void SetWireframe(bool wireframe)
Definition: content_context.cc:561
impeller::Playground::OpenPlaygroundHere
bool OpenPlaygroundHere(const Renderer::RenderCallback &render_callback)
Definition: playground.cc:204
impeller::EntityPlayground::EntityPlaygroundCallback
std::function< bool(ContentContext &context, RenderPass &pass)> EntityPlaygroundCallback
Definition: entity_playground.h:20
impeller::EntityPlayground::EntityPlayground
EntityPlayground()
Definition: entity_playground.cc:13
impeller::Playground::GetContext
std::shared_ptr< Context > GetContext() const
Definition: playground.cc:90
impeller::EntityPlayground::SetTypographerContext
void SetTypographerContext(std::shared_ptr< TypographerContext > typographer_context)
Definition: entity_playground.cc:18
impeller
Definition: aiks_blend_unittests.cc:18
impeller::ContentContext::IsValid
bool IsValid() const
Definition: content_context.cc:467
impeller::ContentContext
Definition: content_context.h:366
impeller::PlaygroundSwitches::enable_playground
bool enable_playground
Definition: switches.h:16
impeller::EntityPlayground::GetContentContext
std::shared_ptr< ContentContext > GetContentContext() const
Definition: entity_playground.cc:45
impeller::ContentContext::GetTransientsBuffer
HostBuffer & GetTransientsBuffer() const
Retrieve the currnent host buffer for transient storage.
Definition: content_context.h:752
entity_playground.h