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// 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/quads/nine_patch_generator.h"
#include "cc/layers/draw_properties.h"
#include "cc/quads/render_pass.h"
#include "cc/quads/texture_draw_quad.h"
#include "cc/trees/layer_tree_impl.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,
RenderPass* render_pass,
SharedQuadState* shared_quad_state,
const std::vector<Patch>& patches) {
if (!ui_resource_id)
return;
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);
gfx::Rect opaque_rect = opaque ? visible_rect : gfx::Rect();
if (!visible_rect.IsEmpty()) {
gfx::RectF image_rect = patch.normalized_image_rect;
TextureDrawQuad* quad =
render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
quad->SetNew(shared_quad_state, output_rect, opaque_rect, visible_rect,
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 = base::MakeUnique<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 = base::MakeUnique<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 = base::MakeUnique<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