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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 "impeller/entity/contents/tiled_texture_contents.h"
#include "impeller/entity/contents/clip_contents.h"
#include "impeller/entity/contents/content_context.h"
#include "impeller/entity/geometry.h"
#include "impeller/entity/tiled_texture_fill.frag.h"
#include "impeller/entity/tiled_texture_fill.vert.h"
#include "impeller/geometry/path_builder.h"
#include "impeller/renderer/render_pass.h"
#include "impeller/renderer/sampler_library.h"
namespace impeller {
TiledTextureContents::TiledTextureContents() = default;
TiledTextureContents::~TiledTextureContents() = default;
void TiledTextureContents::SetTexture(std::shared_ptr<Texture> texture) {
texture_ = std::move(texture);
}
void TiledTextureContents::SetTileModes(Entity::TileMode x_tile_mode,
Entity::TileMode y_tile_mode) {
x_tile_mode_ = x_tile_mode;
y_tile_mode_ = y_tile_mode;
}
void TiledTextureContents::SetSamplerDescriptor(SamplerDescriptor desc) {
sampler_descriptor_ = std::move(desc);
}
bool TiledTextureContents::Render(const ContentContext& renderer,
const Entity& entity,
RenderPass& pass) const {
if (texture_ == nullptr) {
return true;
}
using VS = TiledTextureFillVertexShader;
using FS = TiledTextureFillFragmentShader;
const auto texture_size = texture_->GetSize();
if (texture_size.IsEmpty()) {
return true;
}
auto& host_buffer = pass.GetTransientsBuffer();
VS::VertInfo vert_info;
vert_info.mvp = Matrix::MakeOrthographic(pass.GetRenderTargetSize()) *
entity.GetTransformation();
vert_info.matrix = GetInverseMatrix();
vert_info.texture_size = Vector2{static_cast<Scalar>(texture_size.width),
static_cast<Scalar>(texture_size.height)};
FS::FragInfo frag_info;
frag_info.texture_sampler_y_coord_scale = texture_->GetYCoordScale();
frag_info.x_tile_mode = static_cast<Scalar>(x_tile_mode_);
frag_info.y_tile_mode = static_cast<Scalar>(y_tile_mode_);
frag_info.alpha = GetAlpha();
Command cmd;
cmd.label = "TiledTextureFill";
cmd.pipeline =
renderer.GetTiledTexturePipeline(OptionsFromPassAndEntity(pass, entity));
cmd.stencil_reference = entity.GetStencilDepth();
auto geometry_result =
GetGeometry()->GetPositionBuffer(renderer, entity, pass);
auto options = OptionsFromPassAndEntity(pass, entity);
if (geometry_result.prevent_overdraw) {
options.stencil_compare = CompareFunction::kEqual;
options.stencil_operation = StencilOperation::kIncrementClamp;
}
options.primitive_type = geometry_result.type;
cmd.pipeline = renderer.GetTiledTexturePipeline(options);
cmd.BindVertices(geometry_result.vertex_buffer);
VS::BindVertInfo(cmd, host_buffer.EmplaceUniform(vert_info));
FS::BindFragInfo(cmd, host_buffer.EmplaceUniform(frag_info));
FS::BindTextureSampler(cmd, texture_,
renderer.GetContext()->GetSamplerLibrary()->GetSampler(
sampler_descriptor_));
if (!pass.AddCommand(std::move(cmd))) {
return false;
}
if (geometry_result.prevent_overdraw) {
return ClipRestoreContents().Render(renderer, entity, pass);
}
return true;
}
} // namespace impeller