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Diffstat (limited to 'src/images/SkImageDecoder_libbmp.cpp')
-rw-r--r-- | src/images/SkImageDecoder_libbmp.cpp | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/src/images/SkImageDecoder_libbmp.cpp b/src/images/SkImageDecoder_libbmp.cpp deleted file mode 100644 index b9359bea7a..0000000000 --- a/src/images/SkImageDecoder_libbmp.cpp +++ /dev/null @@ -1,166 +0,0 @@ - -/* - * Copyright 2007 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 "bmpdecoderhelper.h" -#include "SkColorPriv.h" -#include "SkData.h" -#include "SkImageDecoder.h" -#include "SkScaledBitmapSampler.h" -#include "SkStream.h" -#include "SkStreamPriv.h" -#include "SkTDArray.h" - -class SkBMPImageDecoder : public SkImageDecoder { -public: - SkBMPImageDecoder() {} - - Format getFormat() const override { - return kBMP_Format; - } - -protected: - Result onDecode(SkStream* stream, SkBitmap* bm, Mode mode) override; - -private: - typedef SkImageDecoder INHERITED; -}; - -/////////////////////////////////////////////////////////////////////////////// -DEFINE_DECODER_CREATOR(BMPImageDecoder); -/////////////////////////////////////////////////////////////////////////////// - -static bool is_bmp(SkStreamRewindable* stream) { - static const char kBmpMagic[] = { 'B', 'M' }; - - - char buffer[sizeof(kBmpMagic)]; - - return stream->read(buffer, sizeof(kBmpMagic)) == sizeof(kBmpMagic) && - !memcmp(buffer, kBmpMagic, sizeof(kBmpMagic)); -} - -static SkImageDecoder* sk_libbmp_dfactory(SkStreamRewindable* stream) { - if (is_bmp(stream)) { - return new SkBMPImageDecoder; - } - return nullptr; -} - -static SkImageDecoder_DecodeReg gReg(sk_libbmp_dfactory); - -static SkImageDecoder::Format get_format_bmp(SkStreamRewindable* stream) { - if (is_bmp(stream)) { - return SkImageDecoder::kBMP_Format; - } - return SkImageDecoder::kUnknown_Format; -} - -static SkImageDecoder_FormatReg gFormatReg(get_format_bmp); - -/////////////////////////////////////////////////////////////////////////////// - -class SkBmpDecoderCallback : public image_codec::BmpDecoderCallback { -public: - // we don't copy the bitmap, just remember the pointer - SkBmpDecoderCallback(bool justBounds) : fJustBounds(justBounds) {} - - // override from BmpDecoderCallback - virtual uint8* SetSize(int width, int height) { - fWidth = width; - fHeight = height; - if (fJustBounds) { - return nullptr; - } - - fRGB.setCount(width * height * 3); // 3 == r, g, b - return fRGB.begin(); - } - - int width() const { return fWidth; } - int height() const { return fHeight; } - const uint8_t* rgb() const { return fRGB.begin(); } - -private: - SkTDArray<uint8_t> fRGB; - int fWidth; - int fHeight; - bool fJustBounds; -}; - -SkImageDecoder::Result SkBMPImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) { - // First read the entire stream, so that all of the data can be passed to - // the BmpDecoderHelper. - - auto data = SkCopyStreamToData(stream); - if (!data) { - return kFailure; - } - - // Byte length of all of the data. - const size_t length = data->size(); - if (0 == length) { - return kFailure; - } - - const bool justBounds = SkImageDecoder::kDecodeBounds_Mode == mode; - SkBmpDecoderCallback callback(justBounds); - - // Now decode the BMP into callback's rgb() array [r,g,b, r,g,b, ...] - { - image_codec::BmpDecoderHelper helper; - const int max_pixels = 16383*16383; // max width*height - if (!helper.DecodeImage((const char*) data->data(), length, - max_pixels, &callback)) { - return kFailure; - } - } - - // we don't need this anymore, so free it now (before we try to allocate - // the bitmap's pixels) rather than waiting for its destructor - data.reset(nullptr); - - int width = callback.width(); - int height = callback.height(); - SkColorType colorType = this->getPrefColorType(k32Bit_SrcDepth, false); - - // only accept prefConfig if it makes sense for us - if (kARGB_4444_SkColorType != colorType && kRGB_565_SkColorType != colorType) { - colorType = kN32_SkColorType; - } - - SkScaledBitmapSampler sampler(width, height, getSampleSize()); - - bm->setInfo(SkImageInfo::Make(sampler.scaledWidth(), sampler.scaledHeight(), - colorType, kOpaque_SkAlphaType)); - - if (justBounds) { - return kSuccess; - } - - if (!this->allocPixelRef(bm, nullptr)) { - return kFailure; - } - - SkAutoLockPixels alp(*bm); - - if (!sampler.begin(bm, SkScaledBitmapSampler::kRGB, *this)) { - return kFailure; - } - - const int srcRowBytes = width * 3; - const int dstHeight = sampler.scaledHeight(); - const uint8_t* srcRow = callback.rgb(); - - srcRow += sampler.srcY0() * srcRowBytes; - for (int y = 0; y < dstHeight; y++) { - sampler.next(srcRow); - srcRow += sampler.srcDY() * srcRowBytes; - } - return kSuccess; -} |