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      1 /*
      2  * Copyright 2014 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "Benchmark.h"
      9 #include "Resources.h"
     10 #include "SkCanvas.h"
     11 #include "SkData.h"
     12 #include "SkDecodingImageGenerator.h"
     13 #include "SkImageDecoder.h"
     14 #include "SkOSFile.h"
     15 #include "SkPixelRef.h"
     16 
     17 #ifndef SK_IGNORE_ETC1_SUPPORT
     18 
     19 #include "etc1.h"
     20 
     21 // This takes the etc1 data pointed to by orig, and copies it `factor` times in each
     22 // dimension. The return value is the new data or NULL on error.
     23 static etc1_byte* create_expanded_etc1_bitmap(const uint8_t* orig, int factor) {
     24     SkASSERT(NULL != orig);
     25     SkASSERT(factor > 1);
     26 
     27     const etc1_byte* origData = reinterpret_cast<const etc1_byte*>(orig);
     28     if (!etc1_pkm_is_valid(orig)) {
     29         return NULL;
     30     }
     31 
     32     etc1_uint32 origWidth = etc1_pkm_get_width(origData);
     33     etc1_uint32 origHeight = etc1_pkm_get_height(origData);
     34 
     35     // The width and height must be aligned along block boundaries
     36     static const etc1_uint32 kETC1BlockWidth = 4;
     37     static const etc1_uint32 kETC1BlockHeight = 4;
     38     if ((origWidth % kETC1BlockWidth) != 0 ||
     39         (origHeight % kETC1BlockHeight) != 0) {
     40         return NULL;
     41     }
     42 
     43     // The picture must be at least as large as a block.
     44     if (origWidth <= kETC1BlockWidth || origHeight <= kETC1BlockHeight) {
     45         return NULL;
     46     }
     47 
     48     etc1_uint32 newWidth = origWidth * factor;
     49     etc1_uint32 newHeight = origHeight * factor;
     50 
     51     etc1_uint32 newDataSz = etc1_get_encoded_data_size(newWidth, newHeight);
     52     etc1_byte* newData = reinterpret_cast<etc1_byte *>(
     53         sk_malloc_throw(newDataSz + ETC_PKM_HEADER_SIZE));
     54     etc1_pkm_format_header(newData, newWidth, newHeight);
     55 
     56     etc1_byte* copyInto = newData;
     57 
     58     copyInto += ETC_PKM_HEADER_SIZE;
     59     origData += ETC_PKM_HEADER_SIZE;
     60 
     61     etc1_uint32 origBlocksX = (origWidth >> 2);
     62     etc1_uint32 origBlocksY = (origHeight >> 2);
     63     etc1_uint32 newBlocksY = (newHeight >> 2);
     64     etc1_uint32 origRowSzInBytes = origBlocksX * ETC1_ENCODED_BLOCK_SIZE;
     65 
     66     for (etc1_uint32 j = 0; j < newBlocksY; ++j) {
     67         const etc1_byte* rowStart = origData + ((j % origBlocksY) * origRowSzInBytes);
     68         for(etc1_uint32 i = 0; i < newWidth; i += origWidth) {
     69             memcpy(copyInto, rowStart, origRowSzInBytes);
     70             copyInto += origRowSzInBytes;
     71         }
     72     }
     73     return newData;
     74 }
     75 
     76 // This is the base class for all of the benches in this file. In general
     77 // the ETC1 benches should all be working on the same data. Due to the
     78 // simplicity of the PKM file, that data is the 128x128 mandrill etc1
     79 // compressed texture repeated by some factor (currently 8 -> 1024x1024)
     80 class ETCBitmapBenchBase : public Benchmark {
     81 public:
     82     ETCBitmapBenchBase() : fPKMData(loadPKM()) {
     83         if (NULL == fPKMData) {
     84             SkDebugf("Could not load PKM data!");
     85         }
     86     }
     87 
     88 protected:
     89     SkAutoDataUnref fPKMData;
     90 
     91 private:
     92     SkData *loadPKM() {
     93         SkString resourcePath = GetResourcePath();
     94         SkString filename = SkOSPath::SkPathJoin(resourcePath.c_str(),
     95                                                  "mandrill_128.pkm");
     96 
     97         // Expand the data
     98         SkAutoDataUnref fileData(SkData::NewFromFileName(filename.c_str()));
     99         if (NULL == fileData) {
    100             SkDebugf("Could not open the file. Did you forget to set the resourcePath?\n");
    101             return NULL;
    102         }
    103 
    104         const etc1_uint32 kExpansionFactor = 8;
    105         etc1_byte* expandedETC1 =
    106             create_expanded_etc1_bitmap(fileData->bytes(), kExpansionFactor);
    107         if (NULL == expandedETC1) {
    108             SkDebugf("Error expanding ETC1 data by factor of %d\n", kExpansionFactor);
    109             return NULL;
    110         }
    111 
    112         etc1_uint32 width = etc1_pkm_get_width(expandedETC1);
    113         etc1_uint32 height = etc1_pkm_get_width(expandedETC1);
    114         etc1_uint32 dataSz = ETC_PKM_HEADER_SIZE + etc1_get_encoded_data_size(width, height);
    115         return SkData::NewFromMalloc(expandedETC1, dataSz);
    116     }
    117 
    118     typedef Benchmark INHERITED;
    119 };
    120 
    121 // This is the rendering benchmark. Prior to rendering the data, create a
    122 // bitmap using the etc1 data.
    123 class ETCBitmapBench : public ETCBitmapBenchBase {
    124 public:
    125     ETCBitmapBench(bool decompress, Backend backend)
    126         : fDecompress(decompress), fBackend(backend) { }
    127 
    128     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
    129         return backend == this->fBackend;
    130     }
    131 
    132 protected:
    133     virtual const char* onGetName() SK_OVERRIDE {
    134         if (kGPU_Backend == this->fBackend) {
    135             if (this->fDecompress) {
    136                 return "etc1bitmap_render_gpu_decompressed";
    137             } else {
    138                 return "etc1bitmap_render_gpu_compressed";
    139             }
    140         } else {
    141             SkASSERT(kRaster_Backend == this->fBackend);
    142             if (this->fDecompress) {
    143                 return "etc1bitmap_render_raster_decompressed";
    144             } else {
    145                 return "etc1bitmap_render_raster_compressed";
    146             }
    147         }
    148     }
    149 
    150     virtual void onPreDraw() SK_OVERRIDE {
    151         if (NULL == fPKMData) {
    152             SkDebugf("Failed to load PKM data!\n");
    153             return;
    154         }
    155 
    156         // Install pixel ref
    157         if (!SkInstallDiscardablePixelRef(
    158                 SkDecodingImageGenerator::Create(
    159                     fPKMData, SkDecodingImageGenerator::Options()), &(this->fBitmap))) {
    160             SkDebugf("Could not install discardable pixel ref.\n");
    161             return;
    162         }
    163 
    164         // Decompress it if necessary
    165         if (this->fDecompress) {
    166             this->fBitmap.lockPixels();
    167         }
    168     }
    169 
    170     virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
    171         for (int i = 0; i < loops; ++i) {
    172             canvas->drawBitmap(this->fBitmap, 0, 0, NULL);
    173         }
    174     }
    175 
    176 protected:
    177     SkBitmap fBitmap;
    178     bool decompress() const { return fDecompress; }
    179     Backend backend() const { return fBackend; }
    180 private:
    181     const bool fDecompress;
    182     const Backend fBackend;
    183     typedef ETCBitmapBenchBase INHERITED;
    184 };
    185 
    186 // This benchmark is identical to the previous benchmark, but it explicitly forces
    187 // an upload to the GPU before each draw call. We do this by notifying the bitmap
    188 // that the pixels have changed (even though they haven't).
    189 class ETCBitmapUploadBench : public ETCBitmapBench {
    190 public:
    191     ETCBitmapUploadBench(bool decompress, Backend backend)
    192         : ETCBitmapBench(decompress, backend) { }
    193 
    194 protected:
    195     virtual const char* onGetName() SK_OVERRIDE {
    196         if (kGPU_Backend == this->backend()) {
    197             if (this->decompress()) {
    198                 return "etc1bitmap_upload_gpu_decompressed";
    199             } else {
    200                 return "etc1bitmap_upload_gpu_compressed";
    201             }
    202         } else {
    203             SkASSERT(kRaster_Backend == this->backend());
    204             if (this->decompress()) {
    205                 return "etc1bitmap_upload_raster_decompressed";
    206             } else {
    207                 return "etc1bitmap_upload_raster_compressed";
    208             }
    209         }
    210     }
    211 
    212     virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
    213         SkPixelRef* pr = fBitmap.pixelRef();
    214         for (int i = 0; i < loops; ++i) {
    215             if (pr) {
    216                 pr->notifyPixelsChanged();
    217             }
    218             canvas->drawBitmap(this->fBitmap, 0, 0, NULL);
    219         }
    220     }
    221 
    222 private:
    223     typedef ETCBitmapBench INHERITED;
    224 };
    225 
    226 DEF_BENCH(return new ETCBitmapBench(false, Benchmark::kRaster_Backend);)
    227 DEF_BENCH(return new ETCBitmapBench(true, Benchmark::kRaster_Backend);)
    228 
    229 DEF_BENCH(return new ETCBitmapBench(false, Benchmark::kGPU_Backend);)
    230 DEF_BENCH(return new ETCBitmapBench(true, Benchmark::kGPU_Backend);)
    231 
    232 DEF_BENCH(return new ETCBitmapUploadBench(false, Benchmark::kRaster_Backend);)
    233 DEF_BENCH(return new ETCBitmapUploadBench(true, Benchmark::kRaster_Backend);)
    234 
    235 DEF_BENCH(return new ETCBitmapUploadBench(false, Benchmark::kGPU_Backend);)
    236 DEF_BENCH(return new ETCBitmapUploadBench(true, Benchmark::kGPU_Backend);)
    237 
    238 #endif  // SK_IGNORE_ETC1_SUPPORT
    239