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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // 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. | ||
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| #include "impeller/entity/contents/color_source_text_contents.h" | ||
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| #include "impeller/entity/contents/content_context.h" | ||
| #include "impeller/entity/contents/texture_contents.h" | ||
| #include "impeller/renderer/render_pass.h" | ||
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| namespace impeller { | ||
|
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| ColorSourceTextContents::ColorSourceTextContents() = default; | ||
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| ColorSourceTextContents::~ColorSourceTextContents() = default; | ||
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| void ColorSourceTextContents::SetTextContents( | ||
| std::shared_ptr<TextContents> text_contents) { | ||
| text_contents_ = std::move(text_contents); | ||
| } | ||
|
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| void ColorSourceTextContents::SetColorSourceContents( | ||
| std::shared_ptr<ColorSourceContents> color_source_contents) { | ||
| color_source_contents_ = std::move(color_source_contents); | ||
| } | ||
|
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| std::optional<Rect> ColorSourceTextContents::GetCoverage( | ||
| const Entity& entity) const { | ||
| return text_contents_->GetCoverage(entity); | ||
| } | ||
|
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| void ColorSourceTextContents::SetTextPosition(Point position) { | ||
| position_ = position; | ||
| } | ||
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| bool ColorSourceTextContents::Render(const ContentContext& renderer, | ||
| const Entity& entity, | ||
| RenderPass& pass) const { | ||
| auto coverage = text_contents_->GetCoverage(entity); | ||
| if (!coverage.has_value()) { | ||
| return true; | ||
| } | ||
| auto transform = entity.GetTransformation(); | ||
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| text_contents_->SetColor(Color::Black()); | ||
| color_source_contents_->SetGeometry( | ||
| Geometry::MakeRect(Rect::MakeSize(coverage->size))); | ||
|
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| // offset the color source so it behaves as if it were drawn in the original | ||
| // position. | ||
| auto effect_transform = | ||
| color_source_contents_->GetInverseMatrix().Invert().Translate(-position_); | ||
| color_source_contents_->SetEffectTransform(effect_transform); | ||
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| auto new_texture = renderer.MakeSubpass( | ||
| "Text Color Blending", ISize::Ceil(coverage.value().size), | ||
| [&](const ContentContext& context, RenderPass& pass) { | ||
| Entity sub_entity; | ||
| sub_entity.SetTransformation(transform); | ||
| sub_entity.SetContents(text_contents_); | ||
| sub_entity.SetBlendMode(BlendMode::kSource); | ||
| if (!sub_entity.Render(context, pass)) { | ||
| return false; | ||
| } | ||
|
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| sub_entity.SetContents(color_source_contents_); | ||
| sub_entity.SetBlendMode(BlendMode::kSourceIn); | ||
| return sub_entity.Render(context, pass); | ||
| }); | ||
| if (!new_texture) { | ||
| return false; | ||
| } | ||
|
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| auto dest_rect = Rect::MakeSize(new_texture->GetSize()) | ||
| .TransformBounds(transform.Invert()) | ||
| .Shift(position_); | ||
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| auto texture_contents = TextureContents::MakeRect(dest_rect); | ||
| texture_contents->SetTexture(new_texture); | ||
| texture_contents->SetSourceRect(Rect::MakeSize(new_texture->GetSize())); | ||
| return texture_contents->Render(renderer, entity, pass); | ||
| } | ||
|
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| } // namespace impeller |
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