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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "OpenGLRenderer"
     18 
     19 #include <utils/Log.h>
     20 
     21 #include "PatchCache.h"
     22 #include "Properties.h"
     23 
     24 namespace android {
     25 namespace uirenderer {
     26 
     27 ///////////////////////////////////////////////////////////////////////////////
     28 // Constructors/destructor
     29 ///////////////////////////////////////////////////////////////////////////////
     30 
     31 PatchCache::PatchCache(): mMaxEntries(DEFAULT_PATCH_CACHE_SIZE) {
     32 }
     33 
     34 PatchCache::PatchCache(uint32_t maxEntries): mMaxEntries(maxEntries) {
     35 }
     36 
     37 PatchCache::~PatchCache() {
     38     clear();
     39 }
     40 
     41 ///////////////////////////////////////////////////////////////////////////////
     42 // Caching
     43 ///////////////////////////////////////////////////////////////////////////////
     44 
     45 void PatchCache::clear() {
     46     size_t count = mCache.size();
     47     for (size_t i = 0; i < count; i++) {
     48         delete mCache.valueAt(i);
     49     }
     50     mCache.clear();
     51 }
     52 
     53 Patch* PatchCache::get(const float bitmapWidth, const float bitmapHeight,
     54         const float pixelWidth, const float pixelHeight,
     55         const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
     56         const uint32_t width, const uint32_t height, const int8_t numColors) {
     57 
     58     int8_t transparentQuads = 0;
     59     uint32_t colorKey = 0;
     60 
     61     if (uint8_t(numColors) < sizeof(uint32_t) * 4) {
     62         for (int8_t i = 0; i < numColors; i++) {
     63             if (colors[i] == 0x0) {
     64                 transparentQuads++;
     65                 colorKey |= 0x1 << i;
     66             }
     67         }
     68     }
     69 
     70     // If the 9patch is made of only transparent quads
     71     if (transparentQuads == int8_t((width + 1) * (height + 1))) {
     72         return NULL;
     73     }
     74 
     75     const PatchDescription description(bitmapWidth, bitmapHeight,
     76             pixelWidth, pixelHeight, width, height, transparentQuads, colorKey);
     77 
     78     ssize_t index = mCache.indexOfKey(description);
     79     Patch* mesh = NULL;
     80     if (index >= 0) {
     81         mesh = mCache.valueAt(index);
     82     }
     83 
     84     if (!mesh) {
     85         PATCH_LOGD("New patch mesh "
     86                 "xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
     87                 width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
     88 
     89         mesh = new Patch(width, height, transparentQuads);
     90         mesh->updateColorKey(colorKey);
     91         mesh->copy(xDivs, yDivs);
     92         mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
     93 
     94         if (mCache.size() >= mMaxEntries) {
     95             delete mCache.valueAt(mCache.size() - 1);
     96             mCache.removeItemsAt(mCache.size() - 1, 1);
     97         }
     98 
     99         mCache.add(description, mesh);
    100     } else if (!mesh->matches(xDivs, yDivs, colorKey)) {
    101         PATCH_LOGD("Patch mesh does not match, refreshing vertices");
    102         mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
    103     }
    104 
    105     return mesh;
    106 }
    107 
    108 }; // namespace uirenderer
    109 }; // namespace android
    110