Revert of Provides multiple implementations of Android's SkBitmapRegionDecoder

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index e31a249f70bcbf58eb340c7de3719c3b87e738f3..2c80fac6be9506e9e26a7a4c180be33e93e06984 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -60,163 +60,6 @@
 void GMSrc::modifyGrContextOptions(GrContextOptions* options) const {
     SkAutoTDelete<skiagm::GM> gm(fFactory(nullptr));
     gm->modifyGrContextOptions(options);
-}
-
-/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
-
-BRDSrc::BRDSrc(Path path, SkBitmapRegionDecoderInterface::Strategy strategy, Mode mode,
-        CodecSrc::DstColorType dstColorType, uint32_t sampleSize)
-    : fPath(path)
-    , fStrategy(strategy)
-    , fMode(mode)
-    , fDstColorType(dstColorType)
-    , fSampleSize(sampleSize)
-{}
-
-bool BRDSrc::veto(SinkFlags flags) const {
-    // No need to test to non-raster or indirect backends.
-    return flags.type != SinkFlags::kRaster
-        || flags.approach != SinkFlags::kDirect;
-}
-
-static SkBitmapRegionDecoderInterface* create_brd(Path path,
-        SkBitmapRegionDecoderInterface::Strategy strategy) {
-    SkAutoTUnref<SkData> encoded(SkData::NewFromFileName(path.c_str()));
-    if (!encoded) {
-        return NULL;
-    }
-    return SkBitmapRegionDecoderInterface::CreateBitmapRegionDecoder(new SkMemoryStream(encoded),
-            strategy);
-}
-
-Error BRDSrc::draw(SkCanvas* canvas) const {
-    SkColorType colorType = canvas->imageInfo().colorType();
-    if (kRGB_565_SkColorType == colorType &&
-            CodecSrc::kGetFromCanvas_DstColorType != fDstColorType) {
-        return Error::Nonfatal("Testing non-565 to 565 is uninteresting.");
-    }
-    switch (fDstColorType) {
-        case CodecSrc::kGetFromCanvas_DstColorType:
-            break;
-        case CodecSrc::kIndex8_Always_DstColorType:
-            colorType = kIndex_8_SkColorType;
-            break;
-        case CodecSrc::kGrayscale_Always_DstColorType:
-            colorType = kGray_8_SkColorType;
-            break;
-    }
-
-    SkAutoTDelete<SkBitmapRegionDecoderInterface> brd(create_brd(fPath, fStrategy));
-    if (nullptr == brd.get()) {
-        return Error::Nonfatal(SkStringPrintf("Could not create brd for %s.", fPath.c_str()));
-    }
-
-    const uint32_t width = brd->width();
-    const uint32_t height = brd->height();
-    // Visually inspecting very small output images is not necessary.
-    if ((width / fSampleSize <= 10 || height / fSampleSize <= 10) && 1 != fSampleSize) {
-        return Error::Nonfatal("Scaling very small images is uninteresting.");
-    }
-    switch (fMode) {
-        case kFullImage_Mode: {
-            SkAutoTDelete<SkBitmap> bitmap(brd->decodeRegion(0, 0, width, height, fSampleSize,
-                    colorType));
-            if (nullptr == bitmap.get() || colorType != bitmap->colorType()) {
-                return Error::Nonfatal("Cannot convert to color type.\n");
-            }
-            canvas->drawBitmap(*bitmap, 0, 0);
-            return "";
-        }
-        case kDivisor_Mode: {
-            const uint32_t divisor = 2;
-            if (width < divisor || height < divisor) {
-                return Error::Nonfatal("Divisor is larger than image dimension.\n");
-            }
-
-            // Use a border to test subsets that extend outside the image.
-            // We will not allow the border to be larger than the image dimensions.  Allowing
-            // these large borders causes off by one errors that indicate a problem with the
-            // test suite, not a problem with the implementation.
-            const uint32_t maxBorder = SkTMin(width, height) / (fSampleSize * divisor);
-            const uint32_t scaledBorder = SkTMin(5u, maxBorder);
-            const uint32_t unscaledBorder = scaledBorder * fSampleSize;
-
-            // We may need to clear the canvas to avoid uninitialized memory.
-            // Assume we are scaling a 780x780 image with sampleSize = 8.
-            // The output image should be 97x97.
-            // Each subset will be 390x390.
-            // Each scaled subset be 48x48.
-            // Four scaled subsets will only fill a 96x96 image.
-            // The bottom row and last column will not be touched.
-            // This is an unfortunate result of our rounding rules when scaling.
-            // Maybe we need to consider testing scaled subsets without trying to
-            // combine them to match the full scaled image?  Or maybe this is the
-            // best we can do?
-            canvas->clear(0);
-
-            for (uint32_t x = 0; x < divisor; x++) {
-                for (uint32_t y = 0; y < divisor; y++) {
-                    // Calculate the subset dimensions
-                    uint32_t subsetWidth = width / divisor;
-                    uint32_t subsetHeight = height / divisor;
-                    const int left = x * subsetWidth;
-                    const int top = y * subsetHeight;
-
-                    // Increase the size of the last subset in each row or column, when the
-                    // divisor does not divide evenly into the image dimensions
-                    subsetWidth += (x + 1 == divisor) ? (width % divisor) : 0;
-                    subsetHeight += (y + 1 == divisor) ? (height % divisor) : 0;
-
-                    // Increase the size of the subset in order to have a border on each side
-                    const int decodeLeft = left - unscaledBorder;
-                    const int decodeTop = top - unscaledBorder;
-                    const uint32_t decodeWidth = subsetWidth + unscaledBorder * 2;
-                    const uint32_t decodeHeight = subsetHeight + unscaledBorder * 2;
-                    SkAutoTDelete<SkBitmap> bitmap(brd->decodeRegion(decodeLeft,
-                            decodeTop, decodeWidth, decodeHeight, fSampleSize, colorType));
-                    if (nullptr == bitmap.get() || colorType != bitmap->colorType()) {
-                        return Error::Nonfatal("Cannot convert to color type.\n");
-                    }
-
-                    canvas->drawBitmapRect(*bitmap,
-                            SkRect::MakeXYWH((SkScalar) scaledBorder, (SkScalar) scaledBorder,
-                                    (SkScalar) (subsetWidth / fSampleSize),
-                                    (SkScalar) (subsetHeight / fSampleSize)),
-                            SkRect::MakeXYWH((SkScalar) (left / fSampleSize),
-                                    (SkScalar) (top / fSampleSize),
-                                    (SkScalar) (subsetWidth / fSampleSize),
-                                    (SkScalar) (subsetHeight / fSampleSize)),
-                            nullptr);
-                }
-            }
-            return "";
-        }
-        default:
-            SkASSERT(false);
-            return "Error: Should not be reached.\n";
-    }
-}
-
-SkISize BRDSrc::size() const {
-    SkAutoTDelete<SkBitmapRegionDecoderInterface> brd(create_brd(fPath, fStrategy));
-    if (brd) {
-        return SkISize::Make(SkTMax(1, brd->width() / (int) fSampleSize),
-                SkTMax(1, brd->height() / (int) fSampleSize));
-    }
-    return SkISize::Make(0, 0);
-}
-
-static SkString get_scaled_name(const Path& path, float scale) {
-    return SkStringPrintf("%s_%.3f", SkOSPath::Basename(path.c_str()).c_str(), scale);
-}
-
-Name BRDSrc::name() const {
-    // We will replicate the names used by CodecSrc so that images can
-    // be compared in Gold.
-    if (1 == fSampleSize) {
-        return SkOSPath::Basename(fPath.c_str());
-    }
-    return get_scaled_name(fPath, BRDSrc::GetScale(fSampleSize));
 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
@@ -650,8 +493,9 @@
 Name CodecSrc::name() const {
     if (1.0f == fScale) {
         return SkOSPath::Basename(fPath.c_str());
-    }
-    return get_scaled_name(fPath, fScale);
+    } else {
+        return SkStringPrintf("%s_%.3f", SkOSPath::Basename(fPath.c_str()).c_str(), fScale);
+    }
 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/