Delete SkImageDecoder

src/images/SkImageDecoder.cpp

-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkImageDecoder.h"
-#include "SkBitmap.h"
-#include "SkImagePriv.h"
-#include "SkPixelRef.h"
-#include "SkStream.h"
-#include "SkTemplates.h"
-#include "SkCanvas.h"
-
-SkImageDecoder::SkImageDecoder()
-    : fPeeker(nullptr)
-    , fAllocator(nullptr)
-    , fSampleSize(1)
-    , fDefaultPref(kUnknown_SkColorType)
-    , fPreserveSrcDepth(false)
-    , fDitherImage(true)
-    , fSkipWritingZeroes(false)
-    , fPreferQualityOverSpeed(false)
-    , fRequireUnpremultipliedColors(false) {
-}
-
-SkImageDecoder::~SkImageDecoder() {
-    SkSafeUnref(fPeeker);
-    SkSafeUnref(fAllocator);
-}
-
-void SkImageDecoder::copyFieldsToOther(SkImageDecoder* other) {
-    if (nullptr == other) {
-        return;
-    }
-    other->setPeeker(fPeeker);
-    other->setAllocator(fAllocator);
-    other->setSampleSize(fSampleSize);
-    other->setPreserveSrcDepth(fPreserveSrcDepth);
-    other->setDitherImage(fDitherImage);
-    other->setSkipWritingZeroes(fSkipWritingZeroes);
-    other->setPreferQualityOverSpeed(fPreferQualityOverSpeed);
-    other->setRequireUnpremultipliedColors(fRequireUnpremultipliedColors);
-}
-
-SkImageDecoder::Format SkImageDecoder::getFormat() const {
-    return kUnknown_Format;
-}
-
-const char* SkImageDecoder::getFormatName() const {
-    return GetFormatName(this->getFormat());
-}
-
-const char* SkImageDecoder::GetFormatName(Format format) {
-    switch (format) {
-        case kUnknown_Format:
-            return "Unknown Format";
-        case kBMP_Format:
-            return "BMP";
-        case kGIF_Format:
-            return "GIF";
-        case kICO_Format:
-            return "ICO";
-        case kPKM_Format:
-            return "PKM";
-        case kKTX_Format:
-            return "KTX";
-        case kASTC_Format:
-            return "ASTC";
-        case kJPEG_Format:
-            return "JPEG";
-        case kPNG_Format:
-            return "PNG";
-        case kWBMP_Format:
-            return "WBMP";
-        case kWEBP_Format:
-            return "WEBP";
-        default:
-            SkDEBUGFAIL("Invalid format type!");
-    }
-    return "Unknown Format";
-}
-
-SkPngChunkReader* SkImageDecoder::setPeeker(SkPngChunkReader* peeker) {
-    SkRefCnt_SafeAssign(fPeeker, peeker);
-    return peeker;
-}
-
-SkBitmap::Allocator* SkImageDecoder::setAllocator(SkBitmap::Allocator* alloc) {
-    SkRefCnt_SafeAssign(fAllocator, alloc);
-    return alloc;
-}
-
-void SkImageDecoder::setSampleSize(int size) {
-    if (size < 1) {
-        size = 1;
-    }
-    fSampleSize = size;
-}
-
-bool SkImageDecoder::allocPixelRef(SkBitmap* bitmap,
-                                   SkColorTable* ctable) const {
-    return bitmap->tryAllocPixels(fAllocator, ctable);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkColorType SkImageDecoder::getPrefColorType(SrcDepth srcDepth, bool srcHasAlpha) const {
-    SkColorType ct = fDefaultPref;
-    if (fPreserveSrcDepth) {
-        switch (srcDepth) {
-            case kIndex_SrcDepth:
-                ct = kIndex_8_SkColorType;
-                break;
-            case k8BitGray_SrcDepth:
-                ct = kN32_SkColorType;
-                break;
-            case k32Bit_SrcDepth:
-                ct = kN32_SkColorType;
-                break;
-        }
-    }
-    return ct;
-}
-
-SkImageDecoder::Result SkImageDecoder::decode(SkStream* stream, SkBitmap* bm, SkColorType pref,
-                                              Mode mode) {
-    // we reset this to false before calling onDecode
-    fShouldCancelDecode = false;
-    // assign this, for use by getPrefColorType(), in case fUsePrefTable is false
-    fDefaultPref = pref;
-
-    // pass a temporary bitmap, so that if we return false, we are assured of
-    // leaving the caller's bitmap untouched.
-    SkBitmap tmp;
-    const Result result = this->onDecode(stream, &tmp, mode);
-    if (kFailure != result) {
-        bm->swap(tmp);
-    }
-    return result;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-bool SkImageDecoder::DecodeFile(const char file[], SkBitmap* bm, SkColorType pref,  Mode mode,
-                                Format* format) {
-    SkASSERT(file);
-    SkASSERT(bm);
-
-    SkAutoTDelete<SkStreamRewindable> stream(SkStream::NewFromFile(file));
-    if (stream.get()) {
-        if (SkImageDecoder::DecodeStream(stream, bm, pref, mode, format)) {
-            if (SkPixelRef* pr = bm->pixelRef()) {
-                pr->setURI(file);
-            }
-            return true;
-        }
-    }
-    return false;
-}
-
-bool SkImageDecoder::DecodeMemory(const void* buffer, size_t size, SkBitmap* bm, SkColorType pref,
-                                  Mode mode, Format* format) {
-    if (0 == size) {
-        return false;
-    }
-    SkASSERT(buffer);
-
-    SkMemoryStream  stream(buffer, size);
-    return SkImageDecoder::DecodeStream(&stream, bm, pref, mode, format);
-}
-
-bool SkImageDecoder::DecodeStream(SkStreamRewindable* stream, SkBitmap* bm, SkColorType pref,
-                                  Mode mode, Format* format) {
-    SkASSERT(stream);
-    SkASSERT(bm);
-
-    bool success = false;
-    SkImageDecoder* codec = SkImageDecoder::Factory(stream);
-
-    if (codec) {
-        success = codec->decode(stream, bm, pref, mode) != kFailure;
-        if (success && format) {
-            *format = codec->getFormat();
-            if (kUnknown_Format == *format) {
-                if (stream->rewind()) {
-                    *format = GetStreamFormat(stream);
-                }
-            }
-        }
-        delete codec;
-    }
-    return success;
-}
-
-bool SkImageDecoder::decodeYUV8Planes(SkStream* stream, SkISize componentSizes[3], void* planes[3],
-                                      size_t rowBytes[3], SkYUVColorSpace* colorSpace) {
-    // we reset this to false before calling onDecodeYUV8Planes
-    fShouldCancelDecode = false;
-
-    return this->onDecodeYUV8Planes(stream, componentSizes, planes, rowBytes, colorSpace);
-}