2 * Copyright 2014 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
12 #include "SkImageGenerator.h"
13 #include "SkImageDecoder.h"
15 #include "SkPixelRef.h"
17 #ifndef SK_IGNORE_ETC1_SUPPORT
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) {
27 const etc1_byte* origData = reinterpret_cast<const etc1_byte*>(orig);
28 if (!etc1_pkm_is_valid(orig)) {
32 etc1_uint32 origWidth = etc1_pkm_get_width(origData);
33 etc1_uint32 origHeight = etc1_pkm_get_height(origData);
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) {
43 // The picture must be at least as large as a block.
44 if (origWidth <= kETC1BlockWidth || origHeight <= kETC1BlockHeight) {
48 etc1_uint32 newWidth = origWidth * factor;
49 etc1_uint32 newHeight = origHeight * factor;
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);
56 etc1_byte* copyInto = newData;
58 copyInto += ETC_PKM_HEADER_SIZE;
59 origData += ETC_PKM_HEADER_SIZE;
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;
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;
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 {
82 ETCBitmapBenchBase() : fPKMData(loadPKM()) {
83 if (NULL == fPKMData) {
84 SkDebugf("Could not load PKM data!");
89 SkAutoDataUnref fPKMData;
93 SkString pkmFilename = GetResourcePath("mandrill_128.pkm");
95 SkAutoDataUnref fileData(SkData::NewFromFileName(pkmFilename.c_str()));
96 if (NULL == fileData) {
97 SkDebugf("Could not open the file. Did you forget to set the resourcePath?\n");
101 const etc1_uint32 kExpansionFactor = 8;
102 etc1_byte* expandedETC1 =
103 create_expanded_etc1_bitmap(fileData->bytes(), kExpansionFactor);
104 if (NULL == expandedETC1) {
105 SkDebugf("Error expanding ETC1 data by factor of %d\n", kExpansionFactor);
109 etc1_uint32 width = etc1_pkm_get_width(expandedETC1);
110 etc1_uint32 height = etc1_pkm_get_width(expandedETC1);
111 etc1_uint32 dataSz = ETC_PKM_HEADER_SIZE + etc1_get_encoded_data_size(width, height);
112 return SkData::NewFromMalloc(expandedETC1, dataSz);
115 typedef Benchmark INHERITED;
118 // This is the rendering benchmark. Prior to rendering the data, create a
119 // bitmap using the etc1 data.
120 class ETCBitmapBench : public ETCBitmapBenchBase {
122 ETCBitmapBench(bool decompress, Backend backend)
123 : fDecompress(decompress), fBackend(backend) { }
125 bool isSuitableFor(Backend backend) SK_OVERRIDE {
126 return backend == this->fBackend;
130 const char* onGetName() SK_OVERRIDE {
131 if (kGPU_Backend == this->fBackend) {
132 if (this->fDecompress) {
133 return "etc1bitmap_render_gpu_decompressed";
135 return "etc1bitmap_render_gpu_compressed";
138 SkASSERT(kRaster_Backend == this->fBackend);
139 if (this->fDecompress) {
140 return "etc1bitmap_render_raster_decompressed";
142 return "etc1bitmap_render_raster_compressed";
147 void onPreDraw() SK_OVERRIDE {
148 if (NULL == fPKMData) {
149 SkDebugf("Failed to load PKM data!\n");
154 if (!SkInstallDiscardablePixelRef(fPKMData, &(this->fBitmap))) {
155 SkDebugf("Could not install discardable pixel ref.\n");
159 // Decompress it if necessary
160 if (this->fDecompress) {
161 this->fBitmap.lockPixels();
165 void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
166 for (int i = 0; i < loops; ++i) {
167 canvas->drawBitmap(this->fBitmap, 0, 0, NULL);
173 bool decompress() const { return fDecompress; }
174 Backend backend() const { return fBackend; }
176 const bool fDecompress;
177 const Backend fBackend;
178 typedef ETCBitmapBenchBase INHERITED;
181 // This benchmark is identical to the previous benchmark, but it explicitly forces
182 // an upload to the GPU before each draw call. We do this by notifying the bitmap
183 // that the pixels have changed (even though they haven't).
184 class ETCBitmapUploadBench : public ETCBitmapBench {
186 ETCBitmapUploadBench(bool decompress, Backend backend)
187 : ETCBitmapBench(decompress, backend) { }
190 const char* onGetName() SK_OVERRIDE {
191 if (kGPU_Backend == this->backend()) {
192 if (this->decompress()) {
193 return "etc1bitmap_upload_gpu_decompressed";
195 return "etc1bitmap_upload_gpu_compressed";
198 SkASSERT(kRaster_Backend == this->backend());
199 if (this->decompress()) {
200 return "etc1bitmap_upload_raster_decompressed";
202 return "etc1bitmap_upload_raster_compressed";
207 void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
208 SkPixelRef* pr = fBitmap.pixelRef();
209 for (int i = 0; i < loops; ++i) {
211 pr->notifyPixelsChanged();
213 canvas->drawBitmap(this->fBitmap, 0, 0, NULL);
218 typedef ETCBitmapBench INHERITED;
221 DEF_BENCH(return new ETCBitmapBench(false, Benchmark::kRaster_Backend);)
222 DEF_BENCH(return new ETCBitmapBench(true, Benchmark::kRaster_Backend);)
224 DEF_BENCH(return new ETCBitmapBench(false, Benchmark::kGPU_Backend);)
225 DEF_BENCH(return new ETCBitmapBench(true, Benchmark::kGPU_Backend);)
227 DEF_BENCH(return new ETCBitmapUploadBench(false, Benchmark::kRaster_Backend);)
228 DEF_BENCH(return new ETCBitmapUploadBench(true, Benchmark::kRaster_Backend);)
230 DEF_BENCH(return new ETCBitmapUploadBench(false, Benchmark::kGPU_Backend);)
231 DEF_BENCH(return new ETCBitmapUploadBench(true, Benchmark::kGPU_Backend);)
233 #endif // SK_IGNORE_ETC1_SUPPORT