108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
namespace android {
|
|
namespace NinePatchUtils {
|
|
|
|
static inline void SetLatticeDivs(SkCanvas::Lattice* lattice, const Res_png_9patch& chunk,
|
|
int width, int height) {
|
|
lattice->fXCount = chunk.numXDivs;
|
|
lattice->fYCount = chunk.numYDivs;
|
|
lattice->fXDivs = chunk.getXDivs();
|
|
lattice->fYDivs = chunk.getYDivs();
|
|
|
|
// We'll often see ninepatches where the last div is equal to the width or height.
|
|
// This doesn't provide any additional information and is not supported by Skia.
|
|
if (lattice->fXCount > 0 && width == lattice->fXDivs[lattice->fXCount - 1]) {
|
|
lattice->fXCount--;
|
|
}
|
|
if (lattice->fYCount > 0 && height == lattice->fYDivs[lattice->fYCount - 1]) {
|
|
lattice->fYCount--;
|
|
}
|
|
}
|
|
|
|
static inline int NumDistinctRects(const SkCanvas::Lattice& lattice) {
|
|
int xRects;
|
|
if (lattice.fXCount > 0) {
|
|
xRects = (0 == lattice.fXDivs[0]) ? lattice.fXCount : lattice.fXCount + 1;
|
|
} else {
|
|
xRects = 1;
|
|
}
|
|
|
|
int yRects;
|
|
if (lattice.fYCount > 0) {
|
|
yRects = (0 == lattice.fYDivs[0]) ? lattice.fYCount : lattice.fYCount + 1;
|
|
} else {
|
|
yRects = 1;
|
|
}
|
|
return xRects * yRects;
|
|
}
|
|
|
|
static inline void SetLatticeFlags(SkCanvas::Lattice* lattice, SkCanvas::Lattice::RectType* flags,
|
|
int numFlags, const Res_png_9patch& chunk, SkColor* colors) {
|
|
lattice->fRectTypes = flags;
|
|
lattice->fColors = colors;
|
|
sk_bzero(flags, numFlags * sizeof(SkCanvas::Lattice::RectType));
|
|
sk_bzero(colors, numFlags * sizeof(SkColor));
|
|
|
|
bool needPadRow = lattice->fYCount > 0 && 0 == lattice->fYDivs[0];
|
|
bool needPadCol = lattice->fXCount > 0 && 0 == lattice->fXDivs[0];
|
|
|
|
int yCount = lattice->fYCount;
|
|
if (needPadRow) {
|
|
// Skip flags for the degenerate first row of rects.
|
|
flags += lattice->fXCount + 1;
|
|
colors += lattice->fXCount + 1;
|
|
yCount--;
|
|
}
|
|
|
|
int i = 0;
|
|
bool setFlags = false;
|
|
for (int y = 0; y < yCount + 1; y++) {
|
|
for (int x = 0; x < lattice->fXCount + 1; x++) {
|
|
if (0 == x && needPadCol) {
|
|
// First rect of each column is degenerate, skip the flag.
|
|
flags++;
|
|
colors++;
|
|
continue;
|
|
}
|
|
|
|
uint32_t currentColor = chunk.getColors()[i++];
|
|
if (Res_png_9patch::TRANSPARENT_COLOR == currentColor) {
|
|
*flags = SkCanvas::Lattice::kTransparent;
|
|
setFlags = true;
|
|
} else if (Res_png_9patch::NO_COLOR != currentColor) {
|
|
*flags = SkCanvas::Lattice::kFixedColor;
|
|
*colors = currentColor;
|
|
setFlags = true;
|
|
}
|
|
|
|
flags++;
|
|
colors++;
|
|
}
|
|
}
|
|
|
|
if (!setFlags) {
|
|
lattice->fRectTypes = nullptr;
|
|
lattice->fColors = nullptr;
|
|
}
|
|
}
|
|
|
|
} // namespace NinePatchUtils
|
|
} // namespace android
|