chromium/third_party/blink/renderer/core/layout/shapes/shape.cc

/*
 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "third_party/blink/renderer/core/layout/shapes/shape.h"

#include <algorithm>
#include <memory>
#include <utility>

#include "cc/paint/paint_flags.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/core/layout/geometry/logical_size.h"
#include "third_party/blink/renderer/core/layout/geometry/writing_mode_converter.h"
#include "third_party/blink/renderer/core/layout/shapes/box_shape.h"
#include "third_party/blink/renderer/core/layout/shapes/ellipse_shape.h"
#include "third_party/blink/renderer/core/layout/shapes/polygon_shape.h"
#include "third_party/blink/renderer/core/layout/shapes/raster_shape.h"
#include "third_party/blink/renderer/core/svg/graphics/svg_image.h"
#include "third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_array_buffer.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h"
#include "third_party/blink/renderer/platform/geometry/float_rounded_rect.h"
#include "third_party/blink/renderer/platform/geometry/length_functions.h"
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include "third_party/blink/renderer/platform/graphics/graphics_types.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_canvas.h"
#include "third_party/blink/renderer/platform/graphics/static_bitmap_image.h"
#include "third_party/blink/renderer/platform/graphics/unaccelerated_static_bitmap_image.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "ui/gfx/geometry/size_f.h"

namespace blink {

namespace {

// This helps to scan pixel data in a logical direction.
class LogicalPixelScanner { … };

}  // namespace

static std::unique_ptr<Shape> CreateInsetShape(const FloatRoundedRect& bounds) { … }

std::unique_ptr<Shape> Shape::CreateShape(const BasicShape* basic_shape,
                                          const LogicalSize& logical_box_size,
                                          WritingMode writing_mode,
                                          float margin) { … }

std::unique_ptr<Shape> Shape::CreateEmptyRasterShape(WritingMode writing_mode,
                                                     float margin) { … }

static bool ExtractImageData(Image* image,
                             const gfx::Size& image_size,
                             ArrayBufferContents& contents,
                             RespectImageOrientationEnum respect_orientation) { … }

static std::unique_ptr<RasterShapeIntervals> ExtractIntervalsFromImageData(
    ArrayBufferContents& contents,
    float threshold,
    int content_block_size,
    const gfx::Size& image_physical_size,
    const gfx::Rect& image_logical_rect,
    const gfx::Rect& margin_logical_rect,
    WritingMode writing_mode) { … }

static bool IsValidRasterShapeSize(const gfx::Size& size) { … }

std::unique_ptr<Shape> Shape::CreateRasterShape(
    Image* image,
    float threshold,
    int content_block_size,
    const gfx::Rect& image_logical_rect,
    const gfx::Rect& margin_logical_rect,
    WritingMode writing_mode,
    float margin,
    RespectImageOrientationEnum respect_orientation) { … }

std::unique_ptr<Shape> Shape::CreateLayoutBoxShape(
    const FloatRoundedRect& rounded_rect,
    WritingMode writing_mode,
    float margin) { … }

}  // namespace blink