| // Copyright 2016 The Chromium 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 "cc/layers/nine_patch_generator.h" |
| |
| #include "cc/trees/layer_tree_impl.h" |
| #include "components/viz/common/quads/render_pass.h" |
| #include "components/viz/common/quads/texture_draw_quad.h" |
| #include "ui/gfx/geometry/rect_conversions.h" |
| #include "ui/gfx/geometry/rect_f.h" |
| |
| namespace cc { |
| |
| namespace { |
| |
| // Maximum number of patches that can be produced for one NinePatchLayer. |
| const int kMaxOcclusionPatches = 12; |
| const int kMaxPatches = 9; |
| |
| gfx::RectF BoundsToRect(int x1, int y1, int x2, int y2) { |
| return gfx::RectF(x1, y1, x2 - x1, y2 - y1); |
| } |
| |
| gfx::RectF NormalizedRect(const gfx::RectF& rect, |
| float total_width, |
| float total_height) { |
| return gfx::RectF(rect.x() / total_width, rect.y() / total_height, |
| rect.width() / total_width, rect.height() / total_height); |
| } |
| |
| } // namespace |
| |
| NinePatchGenerator::Patch::Patch(const gfx::RectF& image_rect, |
| const gfx::Size& total_image_bounds, |
| const gfx::RectF& output_rect) |
| : image_rect(image_rect), |
| normalized_image_rect(NormalizedRect(image_rect, |
| total_image_bounds.width(), |
| total_image_bounds.height())), |
| output_rect(output_rect) {} |
| |
| NinePatchGenerator::NinePatchGenerator() |
| : fill_center_(false), nearest_neighbor_(false) {} |
| |
| bool NinePatchGenerator::SetLayout(const gfx::Size& image_bounds, |
| const gfx::Size& output_bounds, |
| const gfx::Rect& aperture, |
| const gfx::Rect& border, |
| const gfx::Rect& output_occlusion, |
| bool fill_center, |
| bool nearest_neighbor) { |
| if (image_bounds_ == image_bounds && output_bounds_ == output_bounds && |
| image_aperture_ == aperture && border_ == border && |
| fill_center_ == fill_center && output_occlusion_ == output_occlusion && |
| nearest_neighbor_ == nearest_neighbor) |
| return false; |
| |
| image_bounds_ = image_bounds; |
| output_bounds_ = output_bounds; |
| image_aperture_ = aperture; |
| border_ = border; |
| fill_center_ = fill_center; |
| output_occlusion_ = output_occlusion; |
| nearest_neighbor_ = nearest_neighbor; |
| |
| return true; |
| } |
| |
| void NinePatchGenerator::CheckGeometryLimitations() { |
| // |border| is in layer space. It cannot exceed the bounds of the layer. |
| DCHECK_GE(output_bounds_.width(), border_.width()); |
| DCHECK_GE(output_bounds_.height(), border_.height()); |
| |
| // Sanity Check on |border| |
| DCHECK_LE(border_.x(), border_.width()); |
| DCHECK_LE(border_.y(), border_.height()); |
| DCHECK_GE(border_.x(), 0); |
| DCHECK_GE(border_.y(), 0); |
| |
| // |aperture| is in image space. It cannot exceed the bounds of the bitmap. |
| DCHECK(!image_aperture_.size().IsEmpty()); |
| DCHECK(gfx::Rect(image_bounds_).Contains(image_aperture_)) |
| << "image_bounds_ " << gfx::Rect(image_bounds_).ToString() |
| << " image_aperture_ " << image_aperture_.ToString(); |
| |
| // Sanity check on |output_occlusion_|. It should always be within the |
| // border. |
| gfx::Rect border_rect(border_.x(), border_.y(), |
| output_bounds_.width() - border_.width(), |
| output_bounds_.height() - border_.height()); |
| DCHECK(output_occlusion_.IsEmpty() || output_occlusion_.Contains(border_rect)) |
| << "border_rect " << border_rect.ToString() << " output_occlusion_ " |
| << output_occlusion_.ToString(); |
| } |
| |
| std::vector<NinePatchGenerator::Patch> |
| NinePatchGenerator::ComputeQuadsWithoutOcclusion() const { |
| float image_width = image_bounds_.width(); |
| float image_height = image_bounds_.height(); |
| float output_width = output_bounds_.width(); |
| float output_height = output_bounds_.height(); |
| gfx::RectF output_aperture(border_.x(), border_.y(), |
| output_width - border_.width(), |
| output_height - border_.height()); |
| |
| std::vector<Patch> patches; |
| patches.reserve(kMaxPatches); |
| |
| // Top-left. |
| patches.push_back( |
| Patch(BoundsToRect(0, 0, image_aperture_.x(), image_aperture_.y()), |
| image_bounds_, |
| BoundsToRect(0, 0, output_aperture.x(), output_aperture.y()))); |
| |
| // Top-right. |
| patches.push_back(Patch(BoundsToRect(image_aperture_.right(), 0, image_width, |
| image_aperture_.y()), |
| image_bounds_, |
| BoundsToRect(output_aperture.right(), 0, output_width, |
| output_aperture.y()))); |
| |
| // Bottom-left. |
| patches.push_back(Patch(BoundsToRect(0, image_aperture_.bottom(), |
| image_aperture_.x(), image_height), |
| image_bounds_, |
| BoundsToRect(0, output_aperture.bottom(), |
| output_aperture.x(), output_height))); |
| |
| // Bottom-right. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.right(), image_aperture_.bottom(), |
| image_width, image_height), |
| image_bounds_, |
| BoundsToRect(output_aperture.right(), output_aperture.bottom(), |
| output_width, output_height))); |
| |
| // Top. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.x(), 0, image_aperture_.right(), |
| image_aperture_.y()), |
| image_bounds_, |
| BoundsToRect(output_aperture.x(), 0, output_aperture.right(), |
| output_aperture.y()))); |
| |
| // Left. |
| patches.push_back( |
| Patch(BoundsToRect(0, image_aperture_.y(), image_aperture_.x(), |
| image_aperture_.bottom()), |
| image_bounds_, |
| BoundsToRect(0, output_aperture.y(), output_aperture.x(), |
| output_aperture.bottom()))); |
| |
| // Right. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.right(), image_aperture_.y(), |
| image_width, image_aperture_.bottom()), |
| image_bounds_, |
| BoundsToRect(output_aperture.right(), output_aperture.y(), |
| output_width, output_aperture.bottom()))); |
| |
| // Bottom. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.x(), image_aperture_.bottom(), |
| image_aperture_.right(), image_height), |
| image_bounds_, |
| BoundsToRect(output_aperture.x(), output_aperture.bottom(), |
| output_aperture.right(), output_height))); |
| |
| // Center. |
| if (fill_center_) { |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.x(), image_aperture_.y(), |
| image_aperture_.right(), image_aperture_.bottom()), |
| image_bounds_, |
| BoundsToRect(output_aperture.x(), output_aperture.y(), |
| output_aperture.right(), output_aperture.bottom()))); |
| } |
| |
| return patches; |
| } |
| |
| std::vector<NinePatchGenerator::Patch> |
| NinePatchGenerator::ComputeQuadsWithOcclusion() const { |
| float image_width = image_bounds_.width(); |
| float image_height = image_bounds_.height(); |
| |
| float output_width = output_bounds_.width(); |
| float output_height = output_bounds_.height(); |
| |
| float layer_border_right = border_.width() - border_.x(); |
| float layer_border_bottom = border_.height() - border_.y(); |
| |
| float image_aperture_right = image_width - image_aperture_.right(); |
| float image_aperture_bottom = image_height - image_aperture_.bottom(); |
| |
| float output_occlusion_right = output_width - output_occlusion_.right(); |
| float output_occlusion_bottom = output_height - output_occlusion_.bottom(); |
| |
| gfx::RectF image_occlusion(BoundsToRect( |
| border_.x() == 0 |
| ? 0 |
| : (output_occlusion_.x() * image_aperture_.x() / border_.x()), |
| border_.y() == 0 |
| ? 0 |
| : (output_occlusion_.y() * image_aperture_.y() / border_.y()), |
| image_width - (layer_border_right == 0 |
| ? 0 |
| : output_occlusion_right * image_aperture_right / |
| layer_border_right), |
| image_height - (layer_border_bottom == 0 |
| ? 0 |
| : output_occlusion_bottom * image_aperture_bottom / |
| layer_border_bottom))); |
| gfx::RectF output_aperture(border_.x(), border_.y(), |
| output_width - border_.width(), |
| output_height - border_.height()); |
| |
| std::vector<Patch> patches; |
| patches.reserve(kMaxOcclusionPatches); |
| |
| // Top-left-left. |
| patches.push_back( |
| Patch(BoundsToRect(0, 0, image_occlusion.x(), image_aperture_.y()), |
| image_bounds_, |
| BoundsToRect(0, 0, output_occlusion_.x(), output_aperture.y()))); |
| |
| // Top-left-right. |
| patches.push_back( |
| Patch(BoundsToRect(image_occlusion.x(), 0, image_aperture_.x(), |
| image_occlusion.y()), |
| image_bounds_, |
| BoundsToRect(output_occlusion_.x(), 0, output_aperture.x(), |
| output_occlusion_.y()))); |
| |
| // Top-center. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.x(), 0, image_aperture_.right(), |
| image_occlusion.y()), |
| image_bounds_, |
| BoundsToRect(output_aperture.x(), 0, output_aperture.right(), |
| output_occlusion_.y()))); |
| |
| // Top-right-left. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.right(), 0, image_occlusion.right(), |
| image_occlusion.y()), |
| image_bounds_, |
| BoundsToRect(output_aperture.right(), 0, output_occlusion_.right(), |
| output_occlusion_.y()))); |
| |
| // Top-right-right. |
| patches.push_back(Patch(BoundsToRect(image_occlusion.right(), 0, image_width, |
| image_aperture_.y()), |
| image_bounds_, |
| BoundsToRect(output_occlusion_.right(), 0, |
| output_width, output_aperture.y()))); |
| |
| // Left-center. |
| patches.push_back( |
| Patch(BoundsToRect(0, image_aperture_.y(), image_occlusion.x(), |
| image_aperture_.bottom()), |
| image_bounds_, |
| BoundsToRect(0, output_aperture.y(), output_occlusion_.x(), |
| output_aperture.bottom()))); |
| |
| // Right-center. |
| patches.push_back( |
| Patch(BoundsToRect(image_occlusion.right(), image_aperture_.y(), |
| image_width, image_aperture_.bottom()), |
| image_bounds_, |
| BoundsToRect(output_occlusion_.right(), output_aperture.y(), |
| output_width, output_aperture.bottom()))); |
| |
| // Bottom-left-left. |
| patches.push_back(Patch(BoundsToRect(0, image_aperture_.bottom(), |
| image_occlusion.x(), image_height), |
| image_bounds_, |
| BoundsToRect(0, output_aperture.bottom(), |
| output_occlusion_.x(), output_height))); |
| |
| // Bottom-left-right. |
| patches.push_back( |
| Patch(BoundsToRect(image_occlusion.x(), image_occlusion.bottom(), |
| image_aperture_.x(), image_height), |
| image_bounds_, |
| BoundsToRect(output_occlusion_.x(), output_occlusion_.bottom(), |
| output_aperture.x(), output_height))); |
| |
| // Bottom-center. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.x(), image_occlusion.bottom(), |
| image_aperture_.right(), image_height), |
| image_bounds_, |
| BoundsToRect(output_aperture.x(), output_occlusion_.bottom(), |
| output_aperture.right(), output_height))); |
| |
| // Bottom-right-left. |
| patches.push_back( |
| Patch(BoundsToRect(image_aperture_.right(), image_occlusion.bottom(), |
| image_occlusion.right(), image_height), |
| image_bounds_, |
| BoundsToRect(output_aperture.right(), output_occlusion_.bottom(), |
| output_occlusion_.right(), output_height))); |
| |
| // Bottom-right-right. |
| patches.push_back( |
| Patch(BoundsToRect(image_occlusion.right(), image_aperture_.bottom(), |
| image_width, image_height), |
| image_bounds_, |
| BoundsToRect(output_occlusion_.right(), output_aperture.bottom(), |
| output_width, output_height))); |
| |
| return patches; |
| } |
| |
| std::vector<NinePatchGenerator::Patch> NinePatchGenerator::GeneratePatches() |
| const { |
| DCHECK(!output_bounds_.IsEmpty()); |
| |
| std::vector<Patch> patches; |
| |
| if (output_occlusion_.IsEmpty() || fill_center_) |
| patches = ComputeQuadsWithoutOcclusion(); |
| else |
| patches = ComputeQuadsWithOcclusion(); |
| |
| return patches; |
| } |
| |
| void NinePatchGenerator::AppendQuads(LayerImpl* layer_impl, |
| UIResourceId ui_resource_id, |
| viz::RenderPass* render_pass, |
| viz::SharedQuadState* shared_quad_state, |
| const std::vector<Patch>& patches) { |
| if (!ui_resource_id) |
| return; |
| |
| viz::ResourceId resource = |
| layer_impl->layer_tree_impl()->ResourceIdForUIResource(ui_resource_id); |
| |
| if (!resource) |
| return; |
| |
| const float vertex_opacity[] = {1.0f, 1.0f, 1.0f, 1.0f}; |
| const bool opaque = |
| layer_impl->layer_tree_impl()->IsUIResourceOpaque(ui_resource_id); |
| constexpr bool flipped = false; |
| constexpr bool premultiplied_alpha = true; |
| |
| for (const auto& patch : patches) { |
| gfx::Rect output_rect = gfx::ToEnclosingRect(patch.output_rect); |
| gfx::Rect visible_rect = |
| layer_impl->draw_properties() |
| .occlusion_in_content_space.GetUnoccludedContentRect(output_rect); |
| bool needs_blending = !opaque; |
| if (!visible_rect.IsEmpty()) { |
| gfx::RectF image_rect = patch.normalized_image_rect; |
| auto* quad = render_pass->CreateAndAppendDrawQuad<viz::TextureDrawQuad>(); |
| quad->SetNew(shared_quad_state, output_rect, visible_rect, needs_blending, |
| resource, premultiplied_alpha, image_rect.origin(), |
| image_rect.bottom_right(), SK_ColorTRANSPARENT, |
| vertex_opacity, flipped, nearest_neighbor_, false); |
| layer_impl->ValidateQuadResources(quad); |
| } |
| } |
| } |
| |
| void NinePatchGenerator::AsJson(base::DictionaryValue* dictionary) const { |
| auto list = std::make_unique<base::ListValue>(); |
| list->AppendInteger(image_aperture_.origin().x()); |
| list->AppendInteger(image_aperture_.origin().y()); |
| list->AppendInteger(image_aperture_.size().width()); |
| list->AppendInteger(image_aperture_.size().height()); |
| dictionary->Set("ImageAperture", std::move(list)); |
| |
| list = std::make_unique<base::ListValue>(); |
| list->AppendInteger(image_bounds_.width()); |
| list->AppendInteger(image_bounds_.height()); |
| dictionary->Set("ImageBounds", std::move(list)); |
| |
| dictionary->Set("Border", MathUtil::AsValue(border_)); |
| |
| dictionary->SetBoolean("FillCenter", fill_center_); |
| |
| list = std::make_unique<base::ListValue>(); |
| list->AppendInteger(output_occlusion_.x()); |
| list->AppendInteger(output_occlusion_.y()); |
| list->AppendInteger(output_occlusion_.width()); |
| list->AppendInteger(output_occlusion_.height()); |
| dictionary->Set("OutputOcclusion", std::move(list)); |
| } |
| |
| } // namespace cc |
