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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 int PatchCache::PatchDescription::compare(
     46         const PatchCache::PatchDescription& lhs, const PatchCache::PatchDescription& rhs) {
     47     int deltaInt = lhs.bitmapWidth - rhs.bitmapWidth;
     48     if (deltaInt != 0) return deltaInt;
     49 
     50     deltaInt = lhs.bitmapHeight - rhs.bitmapHeight;
     51     if (deltaInt != 0) return deltaInt;
     52 
     53     if (lhs.pixelWidth < rhs.pixelWidth) return -1;
     54     if (lhs.pixelWidth > rhs.pixelWidth) return +1;
     55 
     56     if (lhs.pixelHeight < rhs.pixelHeight) return -1;
     57     if (lhs.pixelHeight > rhs.pixelHeight) return +1;
     58 
     59     deltaInt = lhs.xCount - rhs.xCount;
     60     if (deltaInt != 0) return deltaInt;
     61 
     62     deltaInt = lhs.yCount - rhs.yCount;
     63     if (deltaInt != 0) return deltaInt;
     64 
     65     deltaInt = lhs.emptyCount - rhs.emptyCount;
     66     if (deltaInt != 0) return deltaInt;
     67 
     68     deltaInt = lhs.colorKey - rhs.colorKey;
     69     if (deltaInt != 0) return deltaInt;
     70 
     71     return 0;
     72 }
     73 
     74 void PatchCache::clear() {
     75     size_t count = mCache.size();
     76     for (size_t i = 0; i < count; i++) {
     77         delete mCache.valueAt(i);
     78     }
     79     mCache.clear();
     80 }
     81 
     82 Patch* PatchCache::get(const uint32_t bitmapWidth, const uint32_t bitmapHeight,
     83         const float pixelWidth, const float pixelHeight,
     84         const int32_t* xDivs, const int32_t* yDivs, const uint32_t* colors,
     85         const uint32_t width, const uint32_t height, const int8_t numColors) {
     86 
     87     int8_t transparentQuads = 0;
     88     uint32_t colorKey = 0;
     89 
     90     if (uint8_t(numColors) < sizeof(uint32_t) * 4) {
     91         for (int8_t i = 0; i < numColors; i++) {
     92             if (colors[i] == 0x0) {
     93                 transparentQuads++;
     94                 colorKey |= 0x1 << i;
     95             }
     96         }
     97     }
     98 
     99     // If the 9patch is made of only transparent quads
    100     if (transparentQuads == int8_t((width + 1) * (height + 1))) {
    101         return NULL;
    102     }
    103 
    104     const PatchDescription description(bitmapWidth, bitmapHeight,
    105             pixelWidth, pixelHeight, width, height, transparentQuads, colorKey);
    106 
    107     ssize_t index = mCache.indexOfKey(description);
    108     Patch* mesh = NULL;
    109     if (index >= 0) {
    110         mesh = mCache.valueAt(index);
    111     }
    112 
    113     if (!mesh) {
    114         PATCH_LOGD("New patch mesh "
    115                 "xCount=%d yCount=%d, w=%.2f h=%.2f, bw=%.2f bh=%.2f",
    116                 width, height, pixelWidth, pixelHeight, bitmapWidth, bitmapHeight);
    117 
    118         mesh = new Patch(width, height, transparentQuads);
    119         mesh->updateColorKey(colorKey);
    120         mesh->copy(xDivs, yDivs);
    121         mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
    122 
    123         if (mCache.size() >= mMaxEntries) {
    124             delete mCache.valueAt(mCache.size() - 1);
    125             mCache.removeItemsAt(mCache.size() - 1, 1);
    126         }
    127 
    128         mCache.add(description, mesh);
    129     } else if (!mesh->matches(xDivs, yDivs, colorKey, transparentQuads)) {
    130         PATCH_LOGD("Patch mesh does not match, refreshing vertices");
    131         mesh->updateVertices(bitmapWidth, bitmapHeight, 0.0f, 0.0f, pixelWidth, pixelHeight);
    132     }
    133 
    134     return mesh;
    135 }
    136 
    137 }; // namespace uirenderer
    138 }; // namespace android
    139