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 "gm.h" 9 10#include "Resources.h" 11#include "SkCanvas.h" 12#include "SkData.h" 13#include "SkDecodingImageGenerator.h" 14#include "SkImageDecoder.h" 15#include "SkOSFile.h" 16 17#ifndef SK_IGNORE_ETC1_SUPPORT 18 19#include "etc1.h" 20 21/** 22 * Remove the last row and column of ETC1 blocks, effectively 23 * making a texture that started as power of two into a texture 24 * that is no longer power of two... 25 */ 26bool slice_etc1_data(void *data, int* width, int* height) { 27 28 // First, parse the data and get to it... 29 etc1_byte *origData = reinterpret_cast<etc1_byte *>(data); 30 if (!etc1_pkm_is_valid(origData)) { 31 return false; 32 } 33 34 int origW = etc1_pkm_get_width(origData); 35 int origH = etc1_pkm_get_height(origData); 36 37 int blockWidth = (origW + 3) >> 2; 38 int blockHeight = (origH + 3) >> 2; 39 40 // Make sure that we have blocks to trim off.. 41 if (blockWidth < 2 || blockHeight < 2) { 42 return false; 43 } 44 45 int newWidth = (blockWidth - 1) << 2; 46 int newHeight = (blockHeight - 1) << 2; 47 48 size_t newDataSz = etc1_get_encoded_data_size(newWidth, newHeight) + ETC_PKM_HEADER_SIZE; 49 SkAutoMalloc am(newDataSz); 50 51 etc1_byte *newData = reinterpret_cast<etc1_byte *>(am.get()); 52 53 etc1_pkm_format_header(newData, newWidth, newHeight); 54 newData += ETC_PKM_HEADER_SIZE; 55 origData += ETC_PKM_HEADER_SIZE; 56 57 for (int j = 0; j < blockHeight - 1; ++j) { 58 memcpy(newData, origData, (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE); 59 origData += blockWidth*ETC1_ENCODED_BLOCK_SIZE; 60 newData += (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE; 61 } 62 63 // Stick the data back whence it came 64 memcpy(data, am.get(), newDataSz); 65 *width = newWidth; 66 *height = newHeight; 67 68 return true; 69} 70#endif // SK_IGNORE_ETC1_SUPPORT 71 72namespace skiagm { 73 74/** 75 * Test decoding an image from a PKM or KTX file and then 76 * from compressed ETC1 data. 77 */ 78class ETC1BitmapGM : public GM { 79public: 80 ETC1BitmapGM() { } 81 virtual ~ETC1BitmapGM() { } 82 83protected: 84 virtual SkString onShortName() SK_OVERRIDE { 85 SkString str = SkString("etc1bitmap_"); 86 str.append(this->fileExtension()); 87 return str; 88 } 89 90 virtual SkISize onISize() SK_OVERRIDE { 91 return SkISize::Make(128, 128); 92 } 93 94 virtual SkString fileExtension() const = 0; 95 96 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 97 SkBitmap bm; 98 SkString filename = GetResourcePath("mandrill_128."); 99 filename.append(this->fileExtension()); 100 SkAutoTUnref<SkData> fileData(SkData::NewFromFileName(filename.c_str())); 101 if (NULL == fileData) { 102 SkDebugf("Could not open the file. Did you forget to set the resourcePath?\n"); 103 return; 104 } 105 106 if (!SkInstallDiscardablePixelRef( 107 SkDecodingImageGenerator::Create( 108 fileData, SkDecodingImageGenerator::Options()), &bm)) { 109 SkDebugf("Could not install discardable pixel ref.\n"); 110 return; 111 } 112 113 canvas->drawBitmap(bm, 0, 0); 114 } 115 116private: 117 typedef GM INHERITED; 118}; 119 120// This class specializes ETC1BitmapGM to load the mandrill_128.pkm file. 121class ETC1Bitmap_PKM_GM : public ETC1BitmapGM { 122public: 123 ETC1Bitmap_PKM_GM() : ETC1BitmapGM() { } 124 virtual ~ETC1Bitmap_PKM_GM() { } 125 126protected: 127 128 virtual SkString fileExtension() const SK_OVERRIDE { return SkString("pkm"); } 129 130private: 131 typedef ETC1BitmapGM INHERITED; 132}; 133 134// This class specializes ETC1BitmapGM to load the mandrill_128.ktx file. 135class ETC1Bitmap_KTX_GM : public ETC1BitmapGM { 136public: 137 ETC1Bitmap_KTX_GM() : ETC1BitmapGM() { } 138 virtual ~ETC1Bitmap_KTX_GM() { } 139 140protected: 141 142 virtual SkString fileExtension() const SK_OVERRIDE { return SkString("ktx"); } 143 144private: 145 typedef ETC1BitmapGM INHERITED; 146}; 147 148// This class specializes ETC1BitmapGM to load the mandrill_128.r11.ktx file. 149class ETC1Bitmap_R11_KTX_GM : public ETC1BitmapGM { 150public: 151 ETC1Bitmap_R11_KTX_GM() : ETC1BitmapGM() { } 152 virtual ~ETC1Bitmap_R11_KTX_GM() { } 153 154protected: 155 156 virtual SkString fileExtension() const SK_OVERRIDE { return SkString("r11.ktx"); } 157 158private: 159 typedef ETC1BitmapGM INHERITED; 160}; 161 162#ifndef SK_IGNORE_ETC1_SUPPORT 163/** 164 * Test decoding an image from a PKM file and then 165 * from non-power-of-two compressed ETC1 data. First slice 166 * off a row and column of blocks in order to make it non-power 167 * of two. 168 */ 169class ETC1Bitmap_NPOT_GM : public GM { 170public: 171 ETC1Bitmap_NPOT_GM() { } 172 virtual ~ETC1Bitmap_NPOT_GM() { } 173 174protected: 175 virtual SkString onShortName() SK_OVERRIDE { 176 return SkString("etc1bitmap_npot"); 177 } 178 179 virtual SkISize onISize() SK_OVERRIDE { 180 return SkISize::Make(124, 124); 181 } 182 183 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 184 SkBitmap bm; 185 SkString pkmFilename = GetResourcePath("mandrill_128.pkm"); 186 SkAutoDataUnref fileData(SkData::NewFromFileName(pkmFilename.c_str())); 187 if (NULL == fileData) { 188 SkDebugf("Could not open the file. Did you forget to set the resourcePath?\n"); 189 return; 190 } 191 192 SkAutoMalloc am(fileData->size()); 193 memcpy(am.get(), fileData->data(), fileData->size()); 194 195 int width, height; 196 if (!slice_etc1_data(am.get(), &width, &height)) { 197 SkDebugf("ETC1 Data is poorly formatted.\n"); 198 return; 199 } 200 201 SkASSERT(124 == width); 202 SkASSERT(124 == height); 203 204 size_t dataSz = etc1_get_encoded_data_size(width, height) + ETC_PKM_HEADER_SIZE; 205 SkAutoDataUnref nonPOTData(SkData::NewWithCopy(am.get(), dataSz)); 206 207 if (!SkInstallDiscardablePixelRef( 208 SkDecodingImageGenerator::Create( 209 nonPOTData, SkDecodingImageGenerator::Options()), &bm)) { 210 SkDebugf("Could not install discardable pixel ref.\n"); 211 return; 212 } 213 214 canvas->drawBitmap(bm, 0, 0); 215 } 216 217private: 218 typedef GM INHERITED; 219}; 220#endif // SK_IGNORE_ETC1_SUPPORT 221 222} // namespace skiagm 223 224////////////////////////////////////////////////////////////////////////////// 225 226DEF_GM( return SkNEW(skiagm::ETC1Bitmap_PKM_GM); ) 227DEF_GM( return SkNEW(skiagm::ETC1Bitmap_KTX_GM); ) 228DEF_GM( return SkNEW(skiagm::ETC1Bitmap_R11_KTX_GM); ) 229 230#ifndef SK_IGNORE_ETC1_SUPPORT 231DEF_GM( return SkNEW(skiagm::ETC1Bitmap_NPOT_GM); ) 232#endif // SK_IGNORE_ETC1_SUPPORT 233