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Diffstat (limited to 'skia/images/SkImageDecoder_libbmp.cpp')
-rw-r--r-- | skia/images/SkImageDecoder_libbmp.cpp | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/skia/images/SkImageDecoder_libbmp.cpp b/skia/images/SkImageDecoder_libbmp.cpp deleted file mode 100644 index 32a7a6d..0000000 --- a/skia/images/SkImageDecoder_libbmp.cpp +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright 2007, The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "bmpdecoderhelper.h" -#include "SkImageDecoder.h" -#include "SkScaledBitmapSampler.h" -#include "SkStream.h" -#include "SkColorPriv.h" -#include "SkTDArray.h" - -class SkBMPImageDecoder : public SkImageDecoder { -public: - SkBMPImageDecoder() {} - - virtual Format getFormat() const { - return kBMP_Format; - } - -protected: - virtual bool onDecode(SkStream* stream, SkBitmap* bm, - SkBitmap::Config pref, Mode mode); -}; - -SkImageDecoder* SkImageDecoder_BMP_Factory(SkStream*); -SkImageDecoder* SkImageDecoder_BMP_Factory(SkStream* stream) { - static const char kBmpMagic[] = { 'B', 'M' }; - - size_t len = stream->getLength(); - char buffer[sizeof(kBmpMagic)]; - - if (len > sizeof(kBmpMagic) && - stream->read(buffer, sizeof(kBmpMagic)) == sizeof(kBmpMagic) && - !memcmp(buffer, kBmpMagic, sizeof(kBmpMagic))) { - return SkNEW(SkBMPImageDecoder); - } - return NULL; -} - -/////////////////////////////////////////////////////////////////////////////// - -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 NULL; - } - - fRGB.setCount(width * height * 3); // 3 == r, g, b - return fRGB.begin(); - } - - int width() const { return fWidth; } - int height() const { return fHeight; } - uint8_t* rgb() const { return fRGB.begin(); } - -private: - SkTDArray<uint8_t> fRGB; - int fWidth; - int fHeight; - bool fJustBounds; -}; - -bool SkBMPImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, - SkBitmap::Config prefConfig, Mode mode) { - - size_t length = stream->getLength(); - SkAutoMalloc storage(length); - - if (stream->read(storage.get(), length) != length) { - return false; - } - - 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*)storage.get(), length, - max_pixels, &callback)) { - return false; - } - } - - // 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 - storage.free(); - - int width = callback.width(); - int height = callback.height(); - SkBitmap::Config config = SkBitmap::kARGB_8888_Config; - - // only accept prefConfig if it makes sense for us - if (SkBitmap::kARGB_4444_Config == prefConfig || - SkBitmap::kRGB_565_Config == config) { - config = prefConfig; - } - - SkScaledBitmapSampler sampler(width, height, getSampleSize()); - - bm->setConfig(config, sampler.scaledWidth(), sampler.scaledHeight()); - bm->setIsOpaque(true); - if (justBounds) { - return true; - } - - if (!this->allocPixelRef(bm, NULL)) { - return false; - } - - SkAutoLockPixels alp(*bm); - - if (!sampler.begin(bm, SkScaledBitmapSampler::kRGB, getDitherImage())) { - return false; - } - - 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 true; -} |