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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef AAPT_COMPILE_IMAGE_H
#define AAPT_COMPILE_IMAGE_H
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
#include "android-base/macros.h"
namespace aapt {
/**
* An in-memory image, loaded from disk, with pixels in RGBA_8888 format.
*/
class Image {
public:
explicit Image() = default;
/**
* A `height` sized array of pointers, where each element points to a
* `width` sized row of RGBA_8888 pixels.
*/
std::unique_ptr<uint8_t* []> rows;
/**
* The width of the image in RGBA_8888 pixels. This is int32_t because of
* 9-patch data
* format limitations.
*/
int32_t width = 0;
/**
* The height of the image in RGBA_8888 pixels. This is int32_t because of
* 9-patch data
* format limitations.
*/
int32_t height = 0;
/**
* Buffer to the raw image data stored sequentially.
* Use `rows` to access the data on a row-by-row basis.
*/
std::unique_ptr<uint8_t[]> data;
private:
DISALLOW_COPY_AND_ASSIGN(Image);
};
/**
* A range of pixel values, starting at 'start' and ending before 'end'
* exclusive. Or rather [a, b).
*/
struct Range {
int32_t start = 0;
int32_t end = 0;
explicit Range() = default;
inline explicit Range(int32_t s, int32_t e) : start(s), end(e) {}
};
inline bool operator==(const Range& left, const Range& right) {
return left.start == right.start && left.end == right.end;
}
/**
* Inset lengths from all edges of a rectangle. `left` and `top` are measured
* from the left and top
* edges, while `right` and `bottom` are measured from the right and bottom
* edges, respectively.
*/
struct Bounds {
int32_t left = 0;
int32_t top = 0;
int32_t right = 0;
int32_t bottom = 0;
explicit Bounds() = default;
inline explicit Bounds(int32_t l, int32_t t, int32_t r, int32_t b)
: left(l), top(t), right(r), bottom(b) {}
bool nonZero() const;
};
inline bool Bounds::nonZero() const {
return left != 0 || top != 0 || right != 0 || bottom != 0;
}
inline bool operator==(const Bounds& left, const Bounds& right) {
return left.left == right.left && left.top == right.top &&
left.right == right.right && left.bottom == right.bottom;
}
/**
* Contains 9-patch data from a source image. All measurements exclude the 1px
* border of the
* source 9-patch image.
*/
class NinePatch {
public:
static std::unique_ptr<NinePatch> Create(uint8_t** rows, const int32_t width,
const int32_t height,
std::string* err_out);
/**
* Packs the RGBA_8888 data pointed to by pixel into a uint32_t
* with format 0xAARRGGBB (the way 9-patch expects it).
*/
static uint32_t PackRGBA(const uint8_t* pixel);
/**
* 9-patch content padding/insets. All positions are relative to the 9-patch
* NOT including the 1px thick source border.
*/
Bounds padding;
/**
* Optical layout bounds/insets. This overrides the padding for
* layout purposes. All positions are relative to the 9-patch
* NOT including the 1px thick source border.
* See
* https://developer.android.com/about/versions/android-4.3.html#OpticalBounds
*/
Bounds layout_bounds;
/**
* Outline of the image, calculated based on opacity.
*/
Bounds outline;
/**
* The computed radius of the outline. If non-zero, the outline is a
* rounded-rect.
*/
float outline_radius = 0.0f;
/**
* The largest alpha value within the outline.
*/
uint32_t outline_alpha = 0x000000ffu;
/**
* Horizontal regions of the image that are stretchable.
* All positions are relative to the 9-patch
* NOT including the 1px thick source border.
*/
std::vector<Range> horizontal_stretch_regions;
/**
* Vertical regions of the image that are stretchable.
* All positions are relative to the 9-patch
* NOT including the 1px thick source border.
*/
std::vector<Range> vertical_stretch_regions;
/**
* The colors within each region, fixed or stretchable.
* For w*h regions, the color of region (x,y) is addressable
* via index y*w + x.
*/
std::vector<uint32_t> region_colors;
/**
* Returns serialized data containing the original basic 9-patch meta data.
* Optical layout bounds and round rect outline data must be serialized
* separately using SerializeOpticalLayoutBounds() and
* SerializeRoundedRectOutline().
*/
std::unique_ptr<uint8_t[]> SerializeBase(size_t* out_len) const;
/**
* Serializes the layout bounds.
*/
std::unique_ptr<uint8_t[]> SerializeLayoutBounds(size_t* out_len) const;
/**
* Serializes the rounded-rect outline.
*/
std::unique_ptr<uint8_t[]> SerializeRoundedRectOutline(size_t* out_len) const;
private:
explicit NinePatch() = default;
DISALLOW_COPY_AND_ASSIGN(NinePatch);
};
::std::ostream& operator<<(::std::ostream& out, const Range& range);
::std::ostream& operator<<(::std::ostream& out, const Bounds& bounds);
::std::ostream& operator<<(::std::ostream& out, const NinePatch& nine_patch);
} // namespace aapt
#endif /* AAPT_COMPILE_IMAGE_H */
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