Delete SkImageDecoder

src/images/SkImageDecoder_pkm.cpp

Index: src/images/SkImageDecoder_pkm.cpp
diff --git a/src/images/SkImageDecoder_pkm.cpp b/src/images/SkImageDecoder_pkm.cpp
deleted file mode 100644
index af68f20d9775fea69a11ff7d85f096d7c2de6361..0000000000000000000000000000000000000000
--- a/src/images/SkImageDecoder_pkm.cpp
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkColorPriv.h"
-#include "SkData.h"
-#include "SkImageDecoder.h"
-#include "SkScaledBitmapSampler.h"
-#include "SkStream.h"
-#include "SkStreamPriv.h"
-#include "SkTextureCompressor.h"
-#include "SkTypes.h"
-
-#include "etc1.h"
-
-class SkPKMImageDecoder : public SkImageDecoder {
-public:
-    SkPKMImageDecoder() { }
-
-    Format getFormat() const override {
-        return kPKM_Format;
-    }
-
-protected:
-    Result onDecode(SkStream* stream, SkBitmap* bm, Mode) override;
-
-private:
-    typedef SkImageDecoder INHERITED;
-};
-
-/////////////////////////////////////////////////////////////////////////////////////////
-
-SkImageDecoder::Result SkPKMImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
-    sk_sp<SkData> data(SkCopyStreamToData(stream));
-    if (!data || !data->size()) {
-        return kFailure;
-    }
-
-    unsigned char* buf = (unsigned char*) data->data();
-
-    // Make sure original PKM header is there...
-    SkASSERT(etc1_pkm_is_valid(buf));
-
-    const unsigned short width = etc1_pkm_get_width(buf);
-    const unsigned short height = etc1_pkm_get_height(buf);
-
-    // Setup the sampler...
-    SkScaledBitmapSampler sampler(width, height, this->getSampleSize());
-
-    // Set the config...
-    bm->setInfo(SkImageInfo::MakeN32(sampler.scaledWidth(), sampler.scaledHeight(),
-                                     kOpaque_SkAlphaType));
-    if (SkImageDecoder::kDecodeBounds_Mode == mode) {
-        return kSuccess;
-    }
-
-    if (!this->allocPixelRef(bm, nullptr)) {
-        return kFailure;
-    }
-
-    // Lock the pixels, since we're about to write to them...
-    SkAutoLockPixels alp(*bm);
-
-    if (!sampler.begin(bm, SkScaledBitmapSampler::kRGB, *this)) {
-        return kFailure;
-    }
-
-    // Advance buffer past the header
-    buf += ETC_PKM_HEADER_SIZE;
-
-    // ETC1 Data is encoded as RGB pixels, so we should extract it as such
-    int nPixels = width * height;
-    SkAutoMalloc outRGBData(nPixels * 3);
-    uint8_t *outRGBDataPtr = reinterpret_cast<uint8_t *>(outRGBData.get());
-
-    // Decode ETC1
-    if (!SkTextureCompressor::DecompressBufferFromFormat(
-            outRGBDataPtr, width*3, buf, width, height, SkTextureCompressor::kETC1_Format)) {
-        return kFailure;
-    }
-
-    // Set each of the pixels...
-    const int srcRowBytes = width * 3;
-    const int dstHeight = sampler.scaledHeight();
-    const uint8_t *srcRow = reinterpret_cast<uint8_t *>(outRGBDataPtr);
-    srcRow += sampler.srcY0() * srcRowBytes;
-    for (int y = 0; y < dstHeight; ++y) {
-        sampler.next(srcRow);
-        srcRow += sampler.srcDY() * srcRowBytes;
-    }
-
-    return kSuccess;
-}
-
-/////////////////////////////////////////////////////////////////////////////////////////
-DEFINE_DECODER_CREATOR(PKMImageDecoder);
-/////////////////////////////////////////////////////////////////////////////////////////
-
-static bool is_pkm(SkStreamRewindable* stream) {
-    // Read the PKM header and make sure it's valid.
-    unsigned char buf[ETC_PKM_HEADER_SIZE];
-    if (stream->read((void*)buf, ETC_PKM_HEADER_SIZE) != ETC_PKM_HEADER_SIZE) {
-        return false;
-    }
-
-    return SkToBool(etc1_pkm_is_valid(buf));
-}
-
-static SkImageDecoder* sk_libpkm_dfactory(SkStreamRewindable* stream) {
-    if (is_pkm(stream)) {
-        return new SkPKMImageDecoder;
-    }
-    return nullptr;
-}
-
-static SkImageDecoder_DecodeReg gReg(sk_libpkm_dfactory);
-
-static SkImageDecoder::Format get_format_pkm(SkStreamRewindable* stream) {
-    if (is_pkm(stream)) {
-        return SkImageDecoder::kPKM_Format;
-    }
-    return SkImageDecoder::kUnknown_Format;
-}
-
-static SkImageDecoder_FormatReg gFormatReg(get_format_pkm);