83ccff716f
The graphics JNI code is now separate from libandroid_runtime and it along with HWUI headers are no longer visible to targets outside the boundary of what is to become the UI mainline module The exposed headers to targets outside the module are now restriced to C APIs contained in the apex header directory. Bug: 137655431 Test: CtsUiRenderingTestCases Change-Id: I30d34055b6870dc1039f190a88f4a747cee17300
94 lines
3.6 KiB
C++
94 lines
3.6 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "NinePatchPeeker.h"
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#include <SkBitmap.h>
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#include <cutils/compiler.h>
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using namespace android;
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bool NinePatchPeeker::readChunk(const char tag[], const void* data, size_t length) {
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if (!strcmp("npTc", tag) && length >= sizeof(Res_png_9patch)) {
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Res_png_9patch* patch = (Res_png_9patch*) data;
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size_t patchSize = patch->serializedSize();
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if (length != patchSize) {
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return false;
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}
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// You have to copy the data because it is owned by the png reader
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Res_png_9patch* patchNew = (Res_png_9patch*) malloc(patchSize);
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memcpy(patchNew, patch, patchSize);
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Res_png_9patch::deserialize(patchNew);
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patchNew->fileToDevice();
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free(mPatch);
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mPatch = patchNew;
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mPatchSize = patchSize;
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} else if (!strcmp("npLb", tag) && length == sizeof(int32_t) * 4) {
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mHasInsets = true;
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memcpy(&mOpticalInsets, data, sizeof(int32_t) * 4);
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} else if (!strcmp("npOl", tag) && length == 24) { // 4 int32_ts, 1 float, 1 int32_t sized byte
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mHasInsets = true;
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memcpy(&mOutlineInsets, data, sizeof(int32_t) * 4);
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mOutlineRadius = ((const float*)data)[4];
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mOutlineAlpha = ((const int32_t*)data)[5] & 0xff;
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}
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return true; // keep on decoding
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}
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static void scaleDivRange(int32_t* divs, int count, float scale, int maxValue) {
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for (int i = 0; i < count; i++) {
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divs[i] = int32_t(divs[i] * scale + 0.5f);
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if (i > 0 && divs[i] == divs[i - 1]) {
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divs[i]++; // avoid collisions
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}
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}
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if (CC_UNLIKELY(divs[count - 1] > maxValue)) {
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// if the collision avoidance above put some divs outside the bounds of the bitmap,
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// slide outer stretchable divs inward to stay within bounds
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int highestAvailable = maxValue;
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for (int i = count - 1; i >= 0; i--) {
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divs[i] = highestAvailable;
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if (i > 0 && divs[i] <= divs[i-1]) {
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// keep shifting
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highestAvailable = divs[i] - 1;
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} else {
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break;
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}
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}
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}
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}
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void NinePatchPeeker::scale(float scaleX, float scaleY, int scaledWidth, int scaledHeight) {
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if (!mPatch) {
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return;
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}
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// The max value for the divRange is one pixel less than the actual max to ensure that the size
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// of the last div is not zero. A div of size 0 is considered invalid input and will not render.
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if (!SkScalarNearlyEqual(scaleX, 1.0f)) {
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mPatch->paddingLeft = int(mPatch->paddingLeft * scaleX + 0.5f);
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mPatch->paddingRight = int(mPatch->paddingRight * scaleX + 0.5f);
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scaleDivRange(mPatch->getXDivs(), mPatch->numXDivs, scaleX, scaledWidth - 1);
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}
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if (!SkScalarNearlyEqual(scaleY, 1.0f)) {
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mPatch->paddingTop = int(mPatch->paddingTop * scaleY + 0.5f);
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mPatch->paddingBottom = int(mPatch->paddingBottom * scaleY + 0.5f);
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scaleDivRange(mPatch->getYDivs(), mPatch->numYDivs, scaleY, scaledHeight - 1);
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}
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}
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