Revert of Change SkDecodingImageGenerator API

tests/ImageDecodingTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 #include "TestClassDef.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkData.h"
-#include "SkDecodingImageGenerator.h"
-#include "SkDiscardableMemoryPool.h"
 #include "SkForceLinking.h"
 #include "SkGradientShader.h"
 #include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
-#include "SkImageGenerator.h"
-#include "SkImagePriv.h"
 #include "SkOSFile.h"
 #include "SkPoint.h"
 #include "SkShader.h"
 #include "SkStream.h"
 #include "SkString.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 /**
  *  Interprets c as an unpremultiplied color, and returns the
@@ skipping 116 matching lines @@
     SkString resourcePath = skiatest::Test::GetResourcePath();
     if (resourcePath.isEmpty()) {
         SkDebugf("Could not run unpremul test because resourcePath not specified.");
         return;
     }
     SkOSFile::Iter iter(resourcePath.c_str());
     SkString basename;
     if (iter.next(&basename)) {
         do {
             SkString filename = SkOSPath::SkPathJoin(resourcePath.c_str(), basename.c_str());
-            // SkDebugf("about to decode \"%s\"\n", filename.c_str());
+            //SkDebugf("about to decode \"%s\"\n", filename.c_str());
             compare_unpremul(reporter, filename);
         } while (iter.next(&basename));
     } else {
         SkDebugf("Failed to find any files :(\n");
     }
 }
 
 #ifdef SK_DEBUG
 // Create a stream containing a bitmap encoded to Type type.
 static SkMemoryStream* create_image_stream(SkImageEncoder::Type type) {
@@ skipping 27 matching lines @@
 // Only runs in debug mode since we are testing for a crash.
 static void test_stream_life() {
     const SkImageEncoder::Type gTypes[] = {
 #ifdef SK_BUILD_FOR_ANDROID
         SkImageEncoder::kJPEG_Type,
         SkImageEncoder::kPNG_Type,
 #endif
         SkImageEncoder::kWEBP_Type,
     };
     for (size_t i = 0; i < SK_ARRAY_COUNT(gTypes); ++i) {
-        // SkDebugf("encoding to %i\n", i);
+        //SkDebugf("encoding to %i\n", i);
         SkAutoTUnref<SkMemoryStream> stream(create_image_stream(gTypes[i]));
         if (NULL == stream.get()) {
             SkDebugf("no stream\n");
             continue;
         }
         SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
         if (NULL == decoder.get()) {
             SkDebugf("no decoder\n");
             continue;
         }
         int width, height;
         if (!decoder->buildTileIndex(stream.get(), &width, &height)) {
             SkDebugf("could not build a tile index\n");
             continue;
         }
         // Now unref the stream to make sure it survives
         stream.reset(NULL);
         SkBitmap bm;
         decoder->decodeSubset(&bm, SkIRect::MakeWH(width, height),
                               SkBitmap::kARGB_8888_Config);
     }
 }
 
 // Test inside SkScaledBitmapSampler.cpp
 extern void test_row_proc_choice();
 
-#endif  // SK_DEBUG
+#endif // SK_DEBUG
 
 DEF_TEST(ImageDecoding, reporter) {
     test_unpremul(reporter);
 #ifdef SK_DEBUG
     test_stream_life();
     test_row_proc_choice();
 #endif
 }
-
-////////////////////////////////////////////////////////////////////////////////
-
-// example of how Android will do this inside their BitmapFactory
-static SkPixelRef* install_pixel_ref(SkBitmap* bitmap,
-                                     SkStreamRewindable* stream,
-                                     int sampleSize, bool ditherImage) {
-    SkASSERT(bitmap != NULL);
-    SkASSERT(stream != NULL);
-    SkASSERT(stream->rewind());
-    SkASSERT(stream->unique());
-    SkColorType colorType;
-    if (!SkBitmapConfigToColorType(bitmap->config(), &colorType)) {
-        return NULL;
-    }
-    SkDecodingImageGenerator::Options opts(sampleSize, ditherImage, colorType);
-    SkAutoTDelete<SkImageGenerator> gen(
-        SkDecodingImageGenerator::Create(stream, opts));
-    SkImageInfo info;
-    if ((NULL == gen.get()) || !gen->getInfo(&info)) {
-        return NULL;
-    }
-    SkDiscardableMemory::Factory* factory = NULL;
-    if (info.getSafeSize(info.minRowBytes()) < (32 * 1024)) {
-        // only use ashmem for large images, since mmaps come at a price
-        factory = SkGetGlobalDiscardableMemoryPool();
-    }
-    if (SkInstallDiscardablePixelRef(gen.detach(), bitmap, factory)) {
-        return bitmap->pixelRef();
-    }
-    return NULL;
-}
-/**
- *  A test for the SkDecodingImageGenerator::Create and
- *  SkInstallDiscardablePixelRef functions.
- */
-DEF_TEST(ImprovedBitmapFactory, reporter) {
-    SkString resourcePath = skiatest::Test::GetResourcePath();
-    SkString directory = SkOSPath::SkPathJoin(resourcePath.c_str(), "encoding");
-    SkString path = SkOSPath::SkPathJoin(directory.c_str(), "randPixels.png");
-    SkAutoTUnref<SkStreamRewindable> stream(
-        SkStream::NewFromFile(path.c_str()));
-    if (sk_exists(path.c_str())) {
-        SkBitmap bm;
-        SkAssertResult(bm.setConfig(SkBitmap::kARGB_8888_Config, 1, 1));
-        REPORTER_ASSERT(reporter,
-            NULL != install_pixel_ref(&bm, stream.detach(), 1, true));
-        SkAutoLockPixels alp(bm);
-        REPORTER_ASSERT(reporter, NULL != bm.getPixels());
-    }
-}
-
-
-////////////////////////////////////////////////////////////////////////////////
-
-#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
-static inline bool check_rounding(int value, int dividend, int divisor) {
-    // returns true if (dividend/divisor) rounds up OR down to value
-    return (((divisor * value) > (dividend - divisor))
-            && ((divisor * value) < (dividend + divisor)));
-}
-#endif  // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
-namespace {
-// expected output for 8x8 bitmap
-const int kExpectedWidth = 8;
-const int kExpectedHeight = 8;
-const SkColor kExpectedPixels[] = {
-    0xffbba570, 0xff395f5d, 0xffe25c39, 0xff197666,
-    0xff3cba27, 0xffdefcb0, 0xffc13874, 0xfffa0093,
-    0xffbda60e, 0xffc01db6, 0xff2bd688, 0xff9362d4,
-    0xffc641b2, 0xffa5cede, 0xff606eba, 0xff8f4bf3,
-    0xff3bf742, 0xff8f02a8, 0xff5509df, 0xffc7027e,
-    0xff24aa8a, 0xff886c96, 0xff625481, 0xff403689,
-    0xffc52152, 0xff78ccd6, 0xffdcb4ab, 0xff09d27d,
-    0xffca00f3, 0xff605d47, 0xff446fb2, 0xff576e46,
-    0xff273df9, 0xffb41a83, 0xfff812c3, 0xffccab67,
-    0xff034218, 0xff7db9a7, 0xff821048, 0xfffe4ab4,
-    0xff6fac98, 0xff941d27, 0xff5fe411, 0xfffbb283,
-    0xffd86e99, 0xff169162, 0xff71128c, 0xff39cab4,
-    0xffa7fe63, 0xff4c956b, 0xffbc22e0, 0xffb272e4,
-    0xff129f4a, 0xffe34513, 0xff3d3742, 0xffbd190a,
-    0xffb07222, 0xff2e23f8, 0xfff089d9, 0xffb35738,
-    0xffa86022, 0xff3340fe, 0xff95fe71, 0xff6a71df
-};
-SK_COMPILE_ASSERT((kExpectedWidth * kExpectedHeight)
-                  == SK_ARRAY_COUNT(kExpectedPixels), array_size_mismatch);
-}  // namespace
-
-/**
- * Given either a SkStream or a SkData, try to decode the encoded
- * image using the specified options and report errors.
- */
-static void test_options(skiatest::Reporter* reporter,
-                         const SkDecodingImageGenerator::Options& opts,
-                         SkStreamRewindable* encodedStream,
-                         SkData* encodedData,
-                         bool useData,
-                         const SkString& path) {
-    SkBitmap bm;
-    bool success = false;
-    if (useData) {
-        if (NULL == encodedData) {
-            return;
-        }
-        success = SkInstallDiscardablePixelRef(
-            SkDecodingImageGenerator::Create(encodedData, opts), &bm, NULL);
-    } else {
-        if (NULL == encodedStream) {
-            return;
-        }
-        success = SkInstallDiscardablePixelRef(
-            SkDecodingImageGenerator::Create(encodedStream->duplicate(), opts),
-            &bm, NULL);
-    }
-
-    REPORTER_ASSERT(reporter, success
-                    || (kARGB_4444_SkColorType == opts.fRequestedColorType));
-    if (!success) {
-        return;
-    }
-    #if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
-    // Android is the only system that use Skia's image decoders in
-    // production.  For now, we'll only verify that samplesize works
-    // on systems where it already is known to work.
-    REPORTER_ASSERT(reporter, check_rounding(bm.height(), kExpectedHeight,
-                                             opts.fSampleSize));
-    REPORTER_ASSERT(reporter, check_rounding(bm.width(), kExpectedWidth,
-                                             opts.fSampleSize));
-    #endif  // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
-    SkAutoLockPixels alp(bm);
-    REPORTER_ASSERT(reporter, bm.getPixels() != NULL);
-
-    SkBitmap::Config requestedConfig
-        = SkColorTypeToBitmapConfig(opts.fRequestedColorType);
-    REPORTER_ASSERT(reporter,
-                    (!opts.fUseRequestedColorType)
-                    || (bm.config() == requestedConfig));
-
-    // Condition under which we should check the decoding results:
-    if ((SkBitmap::kARGB_8888_Config == bm.config())
-        && (NULL != bm.getPixels())
-        && (!path.endsWith(".jpg"))  // lossy
-        && (!path.endsWith(".webp"))  // decoder error
-        && (opts.fSampleSize == 1)) {  // scaled
-        bool pixelError = false;
-        const SkColor* correctPixels = kExpectedPixels;
-        SkASSERT(bm.height() == kExpectedHeight);
-        SkASSERT(bm.width() == kExpectedWidth);
-        for (int y = 0; y < bm.height(); ++y) {
-            for (int x = 0; x < bm.width(); ++x) {
-                pixelError |= (*correctPixels != bm.getColor(x, y));
-                ++correctPixels;
-            }
-        }
-        REPORTER_ASSERT(reporter, !pixelError);
-    }
-}
-
-/**
- *  SkDecodingImageGenerator has an Options struct which lets the
- *  client of the generator set sample size, dithering, and bitmap
- *  config.  This test loops through many possible options and tries
- *  them on a set of 5 small encoded images (each in a different
- *  format).  We test both SkData and SkStreamRewindable decoding.
- */
-DEF_TEST(ImageDecoderOptions, reporter) {
-    const char* files[]  = {
-        "randPixels.bmp",
-        "randPixels.jpg",
-        "randPixels.png",
-        "randPixels.webp",
-        "randPixels.gif"
-    };
-
-    SkString resourceDir = skiatest::Test::GetResourcePath();
-    SkString directory = SkOSPath::SkPathJoin(resourceDir.c_str(), "encoding");
-    if (!sk_exists(directory.c_str())) {
-        return;
-    }
-
-    int scaleList[] = {1, 2, 3, 4};
-    bool ditherList[] = {true, false};
-    SkColorType colorList[] = {
-        kAlpha_8_SkColorType,
-        kRGB_565_SkColorType,
-        kARGB_4444_SkColorType,  // Most decoders will fail on 4444.
-        kPMColor_SkColorType
-        // Note that indexed color is left out of the list.  Lazy
-        // decoding doesn't do indexed color.
-    };
-    const bool useDataList[] = {true, false};
-
-    for (size_t fidx = 0; fidx < SK_ARRAY_COUNT(files); ++fidx) {
-        SkString path = SkOSPath::SkPathJoin(directory.c_str(), files[fidx]);
-        if (!sk_exists(path.c_str())) {
-            continue;
-        }
-
-        SkAutoDataUnref encodedData(SkData::NewFromFileName(path.c_str()));
-        REPORTER_ASSERT(reporter, encodedData.get() != NULL);
-        SkAutoTUnref<SkStreamRewindable> encodedStream(
-            SkStream::NewFromFile(path.c_str()));
-        REPORTER_ASSERT(reporter, encodedStream.get() != NULL);
-
-        for (size_t i = 0; i < SK_ARRAY_COUNT(scaleList); ++i) {
-            for (size_t j = 0; j < SK_ARRAY_COUNT(ditherList); ++j) {
-                for (size_t m = 0; m < SK_ARRAY_COUNT(useDataList); ++m) {
-                    for (size_t k = 0; k < SK_ARRAY_COUNT(colorList); ++k) {
-                        SkDecodingImageGenerator::Options opts(scaleList[i],
-                                                               ditherList[j],
-                                                               colorList[k]);
-                        test_options(reporter, opts, encodedStream, encodedData,
-                                     useDataList[m], path);
-
-                    }
-                    SkDecodingImageGenerator::Options options(scaleList[i],
-                                                              ditherList[j]);
-                    test_options(reporter, options, encodedStream, encodedData,
-                                 useDataList[m], path);
-                }
-            }
-        }
-    }
-}
-