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// Copyright 2013 The Flutter 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 "vertices_contents.h"
#include "impeller/entity/contents/content_context.h"
#include "impeller/entity/contents/filters/color_filter_contents.h"
#include "impeller/entity/contents/filters/filter_contents.h"
#include "impeller/entity/contents/texture_contents.h"
#include "impeller/entity/position.vert.h"
#include "impeller/entity/position_color.vert.h"
#include "impeller/entity/vertices.frag.h"
#include "impeller/geometry/color.h"
#include "impeller/renderer/formats.h"
#include "impeller/renderer/render_pass.h"
#include "impeller/renderer/sampler_library.h"
#include "impeller/renderer/vertex_buffer.h"
namespace impeller {
VerticesContents::VerticesContents() = default;
VerticesContents::~VerticesContents() = default;
std::optional<Rect> VerticesContents::GetCoverage(const Entity& entity) const {
return geometry_->GetCoverage(entity.GetTransformation());
};
void VerticesContents::SetGeometry(std::shared_ptr<VerticesGeometry> geometry) {
geometry_ = std::move(geometry);
}
void VerticesContents::SetSourceContents(std::shared_ptr<Contents> contents) {
src_contents_ = std::move(contents);
}
std::shared_ptr<VerticesGeometry> VerticesContents::GetGeometry() const {
return geometry_;
}
void VerticesContents::SetAlpha(Scalar alpha) {
alpha_ = alpha;
}
void VerticesContents::SetBlendMode(BlendMode blend_mode) {
blend_mode_ = blend_mode;
}
const std::shared_ptr<Contents>& VerticesContents::GetSourceContents() const {
return src_contents_;
}
bool VerticesContents::Render(const ContentContext& renderer,
const Entity& entity,
RenderPass& pass) const {
if (blend_mode_ == BlendMode::kClear) {
return true;
}
std::shared_ptr<Contents> src_contents = src_contents_;
if (geometry_->HasTextureCoordinates()) {
auto contents = std::make_shared<VerticesUVContents>(*this);
if (!geometry_->HasVertexColors()) {
contents->SetAlpha(alpha_);
return contents->Render(renderer, entity, pass);
}
src_contents = contents;
}
auto dst_contents = std::make_shared<VerticesColorContents>(*this);
auto contents = ColorFilterContents::MakeBlend(
blend_mode_, {FilterInput::Make(dst_contents, false),
FilterInput::Make(src_contents, false)});
contents->SetAlpha(alpha_);
return contents->Render(renderer, entity, pass);
}
//------------------------------------------------------
// VerticesUVContents
VerticesUVContents::VerticesUVContents(const VerticesContents& parent)
: parent_(parent) {}
VerticesUVContents::~VerticesUVContents() {}
std::optional<Rect> VerticesUVContents::GetCoverage(
const Entity& entity) const {
return parent_.GetCoverage(entity);
}
void VerticesUVContents::SetAlpha(Scalar alpha) {
alpha_ = alpha;
}
bool VerticesUVContents::Render(const ContentContext& renderer,
const Entity& entity,
RenderPass& pass) const {
using VS = TexturePipeline::VertexShader;
using FS = TexturePipeline::FragmentShader;
auto src_contents = parent_.GetSourceContents();
auto snapshot = src_contents->RenderToSnapshot(renderer, entity);
if (!snapshot.has_value()) {
return false;
}
Command cmd;
cmd.label = "VerticesUV";
auto& host_buffer = pass.GetTransientsBuffer();
auto geometry = parent_.GetGeometry();
auto coverage = src_contents->GetCoverage(Entity{});
if (!coverage.has_value()) {
return false;
}
auto geometry_result = geometry->GetPositionUVBuffer(
coverage.value(), Matrix(), renderer, entity, pass);
auto opts = OptionsFromPassAndEntity(pass, entity);
opts.primitive_type = geometry_result.type;
cmd.pipeline = renderer.GetTexturePipeline(opts);
cmd.stencil_reference = entity.GetStencilDepth();
cmd.BindVertices(geometry_result.vertex_buffer);
VS::FrameInfo frame_info;
frame_info.mvp = geometry_result.transform;
frame_info.texture_sampler_y_coord_scale =
snapshot->texture->GetYCoordScale();
VS::BindFrameInfo(cmd, host_buffer.EmplaceUniform(frame_info));
FS::FragInfo frag_info;
frag_info.alpha = alpha_ * snapshot->opacity;
FS::BindFragInfo(cmd, host_buffer.EmplaceUniform(frag_info));
FS::BindTextureSampler(cmd, snapshot->texture,
renderer.GetContext()->GetSamplerLibrary()->GetSampler(
snapshot->sampler_descriptor));
return pass.AddCommand(std::move(cmd));
}
//------------------------------------------------------
// VerticesColorContents
VerticesColorContents::VerticesColorContents(const VerticesContents& parent)
: parent_(parent) {}
VerticesColorContents::~VerticesColorContents() {}
std::optional<Rect> VerticesColorContents::GetCoverage(
const Entity& entity) const {
return parent_.GetCoverage(entity);
}
void VerticesColorContents::SetAlpha(Scalar alpha) {
alpha_ = alpha;
}
bool VerticesColorContents::Render(const ContentContext& renderer,
const Entity& entity,
RenderPass& pass) const {
using VS = GeometryColorPipeline::VertexShader;
using FS = GeometryColorPipeline::FragmentShader;
Command cmd;
cmd.label = "VerticesColors";
auto& host_buffer = pass.GetTransientsBuffer();
auto geometry = parent_.GetGeometry();
auto geometry_result =
geometry->GetPositionColorBuffer(renderer, entity, pass);
auto opts = OptionsFromPassAndEntity(pass, entity);
opts.primitive_type = geometry_result.type;
cmd.pipeline = renderer.GetGeometryColorPipeline(opts);
cmd.stencil_reference = entity.GetStencilDepth();
cmd.BindVertices(geometry_result.vertex_buffer);
VS::FrameInfo frame_info;
frame_info.mvp = geometry_result.transform;
VS::BindFrameInfo(cmd, host_buffer.EmplaceUniform(frame_info));
FS::FragInfo frag_info;
frag_info.alpha = alpha_;
FS::BindFragInfo(cmd, host_buffer.EmplaceUniform(frag_info));
return pass.AddCommand(std::move(cmd));
}
} // namespace impeller