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Diffstat (limited to 'WebCore/platform/graphics/android/ImageSourceAndroid.cpp')
| -rw-r--r-- | WebCore/platform/graphics/android/ImageSourceAndroid.cpp | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/WebCore/platform/graphics/android/ImageSourceAndroid.cpp b/WebCore/platform/graphics/android/ImageSourceAndroid.cpp deleted file mode 100644 index a6bf6c6..0000000 --- a/WebCore/platform/graphics/android/ImageSourceAndroid.cpp +++ /dev/null @@ -1,361 +0,0 @@ -/* - * Copyright 2007, The Android Open Source Project - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "config.h" -#include "ImageDecoder.h" -#include "ImageSource.h" -#include "IntSize.h" -#include "NotImplemented.h" -#include "SharedBuffer.h" -#include "PlatformString.h" - -#include "JavaSharedClient.h" - -#include "SkBitmapRef.h" -#include "SkImageRef.h" -#include "SkImageDecoder.h" -#include "SkStream.h" -#include "SkTemplates.h" - -SkPixelRef* SkCreateRLEPixelRef(const SkBitmap& src); - -//#define TRACE_SUBSAMPLE_BITMAPS -//#define TRACE_RLE_BITMAPS - -#include "SkImageRef_GlobalPool.h" -#include "SkImageRef_ashmem.h" - -// made this up, so we don't waste a file-descriptor on small images, plus -// we don't want to lose too much on the round-up to a page size (4K) -#define MIN_ASHMEM_ALLOC_SIZE (32*1024) - -// don't use RLE for images smaller than this, since they incur a drawing cost -// (and don't work as patterns yet) we only want to use RLE when we must -#define MIN_RLE_ALLOC_SIZE (512*1024) - -static bool should_use_ashmem(const SkBitmap& bm) { - return bm.getSize() >= MIN_ASHMEM_ALLOC_SIZE; -} - -/* Images larger than this should be subsampled. Using ashmem, the decoded - pixels will be purged as needed, so this value can be pretty large. Making - it too small hurts image quality (e.g. abc.com background). 2Meg works for - the sites I've tested, but if we hit important sites that need more, we - should try increasing it and see if it has negative impact on performance - (i.e. we end up thrashing because we need to keep decoding images that have - been purged. - - Perhaps this value should be some fraction of the available RAM... -*/ -static size_t computeMaxBitmapSizeForCache() { - return 2*1024*1024; -} - -/* 8bit images larger than this should be recompressed in RLE, to reduce - on the imageref cache. - - Downside: performance, since we have to decode/encode - and then rle-decode when we draw. -*/ -static bool shouldReencodeAsRLE(const SkBitmap& bm) { - const SkBitmap::Config c = bm.config(); - return (SkBitmap::kIndex8_Config == c || SkBitmap::kA8_Config == c) - && - bm.width() >= 64 // narrower than this won't compress well in RLE - && - bm.getSize() > MIN_RLE_ALLOC_SIZE; -} - -/////////////////////////////////////////////////////////////////////////////// - -class PrivateAndroidImageSourceRec : public SkBitmapRef { -public: - PrivateAndroidImageSourceRec(const SkBitmap& bm, int origWidth, - int origHeight, int sampleSize) - : SkBitmapRef(bm), fSampleSize(sampleSize), fAllDataReceived(false) { - this->setOrigSize(origWidth, origHeight); - } - - int fSampleSize; - bool fAllDataReceived; -}; - -using namespace android; - -namespace WebCore { - -class SharedBufferStream : public SkMemoryStream { -public: - SharedBufferStream(SharedBuffer* buffer) - : SkMemoryStream(buffer->data(), buffer->size(), false) { - fBuffer = buffer; - buffer->ref(); - } - - virtual ~SharedBufferStream() { - // we can't necessarily call fBuffer->deref() here, as we may be - // in a different thread from webkit, and SharedBuffer is not - // threadsafe. Therefore we defer it until it can be executed in the - // webkit thread. -// SkDebugf("-------- enqueue buffer %p for deref\n", fBuffer); - JavaSharedClient::EnqueueFunctionPtr(CallDeref, fBuffer); - } - -private: - // don't allow this to change our data. should not get called, but we - // override here just to be sure - virtual void setMemory(const void* data, size_t length, bool copyData) { - sk_throw(); - } - - // we share ownership of this with webkit - SharedBuffer* fBuffer; - - // will be invoked in the webkit thread - static void CallDeref(void* buffer) { -// SkDebugf("-------- call deref on buffer %p\n", buffer); - ((SharedBuffer*)buffer)->deref(); - } -}; - - -/////////////////////////////////////////////////////////////////////////////// - -ImageSource::ImageSource() { - m_decoder.m_image = NULL; -} - -ImageSource::~ImageSource() { - delete m_decoder.m_image; -} - -bool ImageSource::initialized() const { - return m_decoder.m_image != NULL; -} - -static int computeSampleSize(const SkBitmap& bitmap) { - const size_t maxSize = computeMaxBitmapSizeForCache(); - size_t size = bitmap.getSize(); - int sampleSize = 1; - - while (size > maxSize) { - sampleSize <<= 1; - size >>= 2; - } - -#ifdef TRACE_SUBSAMPLE_BITMAPS - if (sampleSize > 1) { - SkDebugf("------- bitmap [%d %d] config=%d origSize=%d predictSize=%d sampleSize=%d\n", - bitmap.width(), bitmap.height(), bitmap.config(), - bitmap.getSize(), size, sampleSize); - } -#endif - return sampleSize; -} - -static SkPixelRef* convertToRLE(SkBitmap* bm, const void* data, size_t len) { - if (!shouldReencodeAsRLE(*bm)) { - return NULL; - } - - SkBitmap tmp; - - if (!SkImageDecoder::DecodeMemory(data, len, &tmp) || !tmp.getPixels()) { - return NULL; - } - - SkPixelRef* ref = SkCreateRLEPixelRef(tmp); - if (NULL == ref) { - return NULL; - } - -#ifdef TRACE_RLE_BITMAPS - SkDebugf("---- reencode bitmap as RLE: [%d %d] encodeSize=%d\n", - tmp.width(), tmp.height(), len); -#endif - - bm->setConfig(SkBitmap::kRLE_Index8_Config, tmp.width(), tmp.height()); - return ref; -} - -void ImageSource::clearURL() -{ - m_decoder.m_url.reset(); -} - -void ImageSource::setURL(const String& url) -{ - if (url.startsWith("data:")) { - clearURL(); - } else { - m_decoder.m_url.setUTF16(url.characters(), url.length()); - } -} - -void ImageSource::setData(SharedBuffer* data, bool allDataReceived) -{ - if (NULL == m_decoder.m_image) { - SkBitmap tmp; - - SkMemoryStream stream(data->data(), data->size(), false); - SkImageDecoder* codec = SkImageDecoder::Factory(&stream); - SkAutoTDelete<SkImageDecoder> ad(codec); - - if (!codec || !codec->decode(&stream, &tmp, SkBitmap::kNo_Config, - SkImageDecoder::kDecodeBounds_Mode)) { - return; - } - - int origW = tmp.width(); - int origH = tmp.height(); - int sampleSize = computeSampleSize(tmp); - if (sampleSize > 1) { - codec->setSampleSize(sampleSize); - stream.rewind(); - if (!codec->decode(&stream, &tmp, SkBitmap::kNo_Config, - SkImageDecoder::kDecodeBounds_Mode)) { - return; - } - } - - m_decoder.m_image = new PrivateAndroidImageSourceRec(tmp, origW, origH, - sampleSize); - -// SkDebugf("----- started: [%d %d] %s\n", origW, origH, m_decoder.m_url.c_str()); - } - - PrivateAndroidImageSourceRec* decoder = m_decoder.m_image; - if (allDataReceived && !decoder->fAllDataReceived) { - decoder->fAllDataReceived = true; - - SkBitmap* bm = &decoder->bitmap(); - SkPixelRef* ref = convertToRLE(bm, data->data(), data->size()); - - if (NULL == ref) { - SkStream* strm = new SharedBufferStream(data); - // imageref now owns the stream object - if (should_use_ashmem(*bm)) { -// SkDebugf("---- use ashmem for image [%d %d]\n", bm->width(), bm->height()); - ref = new SkImageRef_ashmem(strm, bm->config(), decoder->fSampleSize); - } else { -// SkDebugf("---- use globalpool for image [%d %d]\n", bm->width(), bm->height()); - ref = new SkImageRef_GlobalPool(strm, bm->config(), decoder->fSampleSize); - } - - // SkDebugf("----- allDataReceived [%d %d]\n", bm->width(), bm->height()); - } - - // we promise to never change the pixels (makes picture recording fast) - ref->setImmutable(); - // give it the URL if we have one - ref->setURI(m_decoder.m_url); - // our bitmap is now the only owner of the imageref - bm->setPixelRef(ref)->unref(); - -// SkDebugf("---- finished: [%d %d] %s\n", bm->width(), bm->height(), ref->getURI()); - } -} - -bool ImageSource::isSizeAvailable() -{ - return m_decoder.m_image != NULL; -} - -IntSize ImageSource::size() const -{ - if (m_decoder.m_image) { - return IntSize(m_decoder.m_image->origWidth(), m_decoder.m_image->origHeight()); - } - return IntSize(0, 0); -} - -int ImageSource::repetitionCount() -{ - return 1; - // A property with value 0 means loop forever. -} - -size_t ImageSource::frameCount() const -{ - // i.e. 0 frames if we're not decoded, or 1 frame if we are - return m_decoder.m_image != NULL; -} - -SkBitmapRef* ImageSource::createFrameAtIndex(size_t index) -{ - SkASSERT(index == 0); - SkASSERT(m_decoder.m_image != NULL); - m_decoder.m_image->ref(); - return m_decoder.m_image; -} - -float ImageSource::frameDurationAtIndex(size_t index) -{ - SkASSERT(index == 0); - float duration = 0; - - // Many annoying ads specify a 0 duration to make an image flash as quickly as possible. - // We follow Firefox's behavior and use a duration of 100 ms for any frames that specify - // a duration of <= 10 ms. See gfxImageFrame::GetTimeout in Gecko or Radar 4051389 for more. - if (duration <= 0.010f) - duration = 0.100f; - return duration; -} - -bool ImageSource::frameHasAlphaAtIndex(size_t index) -{ - SkASSERT(0 == index); - - if (NULL == m_decoder.m_image) - return true; // if we're not sure, assume the worse-case - const PrivateAndroidImageSourceRec& decoder = *m_decoder.m_image; - // if we're 16bit, we know even without all the data available - if (decoder.bitmap().getConfig() == SkBitmap::kRGB_565_Config) - return false; - - if (!decoder.fAllDataReceived) - return true; // if we're not sure, assume the worse-case - - return !decoder.bitmap().isOpaque(); -} - -bool ImageSource::frameIsCompleteAtIndex(size_t index) -{ - SkASSERT(0 == index); - return m_decoder.m_image && m_decoder.m_image->fAllDataReceived; -} - -void ImageSource::clear() -{ - // do nothing, since the cache is managed elsewhere -} - -IntSize ImageSource::frameSizeAtIndex(size_t index) const -{ - // for now, all (1) of our frames are the same size - return this->size(); -} - -} |