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Revert of https://codereview.chromium.org/93703004/

Browse Source 
Reason for revert: Test failures

R=scroggo@google.com, djsollen@google.com, reed@google.com, halcanary@google.com
TBR=djsollen@google.com, halcanary@google.com, reed@google.com, scroggo@google.com
NOTREECHECKS=true
NOTRY=true

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/103753007

git-svn-id: http://skia.googlecode.com/svn/trunk@12747 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
commit-bot@chromium.org 2013-12-18 18:33:15 +00:00
parent 1cd71fb013
commit 1ad518bf38
14 changed files with 228 additions and 612 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gm/factory.cpp
View File

@ -12,7 +12,6 @@
#include "SkDiscardableMemoryPool.h"
#include "SkDiscardablePixelRef.h"
#include "SkImageDecoder.h"
#include "SkImageGenerator.h"
#include "SkOSFile.h"
#include "SkStream.h"
@ -36,9 +35,7 @@ protected:
// bitmap is unlocked.
SkAutoTUnref<SkDiscardableMemoryPool> pool(
SkNEW_ARGS(SkDiscardableMemoryPool, (1)));
SkAssertResult(SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(
data, SkDecodingImageGenerator::Options()),
SkAssertResult(SkDecodingImageGenerator::Install(data,
&fBitmap, pool));
}
}
@ -71,4 +68,4 @@ private:
static GM* MyFactory(void*) { return new FactoryGM; }
static GMRegistry reg(MyFactory);
} // namespace skiagm
}

2
include/core/SkImageGenerator.h
View File

@ -21,8 +21,6 @@ class SkImageGenerator;
* the generator. If it succeeds, it will modify destination
* bitmap.
*
* If generator is NULL, will safely return false.
*
* If this fails or when the SkDiscardablePixelRef that is
* installed into destination is destroyed, it will call
* SkDELETE() on the generator. Therefore, generator should be

3
samplecode/SamplePicture.cpp
View File

@ -40,8 +40,7 @@ static SkBitmap load_bitmap() {
SkString path = SkOSPath::SkPathJoin(directory.c_str(), "mandrill_512.png");
SkAutoDataUnref data(SkData::NewFromFileName(path.c_str()));
if (data.get() != NULL) {
SkInstallDiscardablePixelRef(SkDecodingImageGenerator::Create(
data, SkDecodingImageGenerator::Options()), &bm, NULL);
SkDecodingImageGenerator::Install(data.get(), &bm);
}
return bm;
}

37
src/image/SkImagePriv.cpp
View File

@ -9,8 +9,8 @@
#include "SkCanvas.h"
#include "SkPicture.h"
SkBitmap::Config SkColorTypeToBitmapConfig(SkColorType colorType) {
switch (colorType) {
SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo& info) {
switch (info.fColorType) {
case kAlpha_8_SkColorType:
return SkBitmap::kA8_Config;
@ -33,39 +33,6 @@ SkBitmap::Config SkColorTypeToBitmapConfig(SkColorType colorType) {
return SkBitmap::kNo_Config;
}
SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo& info) {
return SkColorTypeToBitmapConfig(info.fColorType);
}
bool SkBitmapConfigToColorType(SkBitmap::Config config, SkColorType* ctOut) {
SkColorType ct;
switch (config) {
case SkBitmap::kA8_Config:
ct = kAlpha_8_SkColorType;
break;
case SkBitmap::kIndex8_Config:
ct = kIndex_8_SkColorType;
break;
case SkBitmap::kRGB_565_Config:
ct = kRGB_565_SkColorType;
break;
case SkBitmap::kARGB_4444_Config:
ct = kARGB_4444_SkColorType;
break;
case SkBitmap::kARGB_8888_Config:
ct = kPMColor_SkColorType;
break;
case SkBitmap::kNo_Config:
default:
return false;
}
if (ctOut) {
*ctOut = ct;
}
return true;
}
SkImage* SkNewImageFromBitmap(const SkBitmap& bm, bool canSharePixelRef) {
SkImageInfo info;
if (!bm.asImageInfo(&info)) {

2
src/image/SkImagePriv.h
View File

@ -14,8 +14,6 @@
class SkPicture;
extern SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo&);
extern SkBitmap::Config SkColorTypeToBitmapConfig(SkColorType);
extern bool SkBitmapConfigToColorType(SkBitmap::Config, SkColorType* ctOut);
// Call this if you explicitly want to use/share this pixelRef in the image
extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*,

315
src/images/SkDecodingImageGenerator.cpp
View File

@ -5,14 +5,13 @@
* found in the LICENSE file.
*/
#include "SkData.h"
#include "SkDecodingImageGenerator.h"
#include "SkData.h"
#include "SkImageDecoder.h"
#include "SkImageInfo.h"
#include "SkImageGenerator.h"
#include "SkImagePriv.h"
#include "SkStream.h"
#include "SkUtils.h"
namespace {
/**
@ -21,55 +20,56 @@ namespace {
*/
class TargetAllocator : public SkBitmap::Allocator {
public:
TargetAllocator(void* target,
size_t rowBytes,
int width,
int height,
SkBitmap::Config config)
TargetAllocator(void* target, size_t rowBytes, const SkImageInfo& info)
: fTarget(target)
, fRowBytes(rowBytes)
, fWidth(width)
, fHeight(height)
, fConfig(config) { }
, fInfo(info) { }
bool isReady() { return (fTarget != NULL); }
virtual bool allocPixelRef(SkBitmap* bm, SkColorTable* ct) {
if ((NULL == fTarget)
|| (fConfig != bm->config())
|| (fWidth != bm->width())
|| (fHeight != bm->height())
|| (ct != NULL)) {
// Call default allocator.
return bm->allocPixels(NULL, ct);
virtual bool allocPixelRef(SkBitmap* bm, SkColorTable* ct) SK_OVERRIDE {
if ((SkImageInfoToBitmapConfig(fInfo) != bm->config())
|| (bm->width() != fInfo.fWidth)
|| (bm->height() != fInfo.fHeight)) {
return false;
}
// make sure fRowBytes is correct.
bm->setConfig(fConfig, fWidth, fHeight, fRowBytes, bm->alphaType());
// TODO(halcanary): verify that all callers of this function
// will respect new RowBytes. Will be moot once rowbytes belongs
// to PixelRef.
bm->setPixels(fTarget, NULL);
fTarget = NULL; // never alloc same pixels twice!
bm->setConfig(bm->config(), bm->width(), bm->height(),
fRowBytes, bm->alphaType());
bm->setPixels(fTarget, ct);
return true;
}
private:
void* fTarget; // Block of memory to be supplied as pixel memory
// in allocPixelRef. Must be large enough to hold
// a bitmap described by fWidth, fHeight, and
// fRowBytes.
size_t fRowBytes; // rowbytes for the destination bitmap
int fWidth; // Along with fHeight and fConfig, the information
int fHeight; // about the bitmap whose pixels this allocator is
// expected to allocate. If they do not match the
// bitmap passed to allocPixelRef, it is assumed
// that the bitmap will be copied to a bitmap with
// the correct info using this allocator, so the
// default allocator will be used instead of
// fTarget.
SkBitmap::Config fConfig;
void* fTarget;
size_t fRowBytes;
SkImageInfo fInfo;
typedef SkBitmap::Allocator INHERITED;
};
} // namespace
////////////////////////////////////////////////////////////////////////////////
SkDecodingImageGenerator::SkDecodingImageGenerator(SkData* data)
: fData(data)
, fHasInfo(false)
, fDoCopyTo(false) {
SkASSERT(fData != NULL);
fStream = SkNEW_ARGS(SkMemoryStream, (fData));
SkASSERT(fStream != NULL);
SkASSERT(fStream->unique());
fData->ref();
}
SkDecodingImageGenerator::SkDecodingImageGenerator(SkStreamRewindable* stream)
: fData(NULL)
, fStream(stream)
, fHasInfo(false)
, fDoCopyTo(false) {
SkASSERT(fStream != NULL);
SkASSERT(fStream->unique());
}
SkDecodingImageGenerator::~SkDecodingImageGenerator() {
SkSafeUnref(fData);
fStream->unref();
}
// TODO(halcanary): Give this macro a better name and move it into SkTypes.h
#ifdef SK_DEBUG
@ -78,49 +78,8 @@ private:
#define SkCheckResult(expr, value) (void)(expr)
#endif
#ifdef SK_DEBUG
inline bool check_alpha(SkAlphaType reported, SkAlphaType actual) {
return ((reported == actual)
|| ((reported == kPremul_SkAlphaType)
&& (actual == kOpaque_SkAlphaType)));
}
#endif // SK_DEBUG
} // namespace
////////////////////////////////////////////////////////////////////////////////
SkDecodingImageGenerator::SkDecodingImageGenerator(
SkData* data,
SkStreamRewindable* stream,
const SkImageInfo& info,
int sampleSize,
bool ditherImage,
SkBitmap::Config requestedConfig)
: fData(data)
, fStream(stream)
, fInfo(info)
, fSampleSize(sampleSize)
, fDitherImage(ditherImage)
, fRequestedConfig(requestedConfig) {
SkASSERT(stream != NULL);
SkSafeRef(fData); // may be NULL.
}
SkDecodingImageGenerator::~SkDecodingImageGenerator() {
SkSafeUnref(fData);
fStream->unref();
}
bool SkDecodingImageGenerator::getInfo(SkImageInfo* info) {
if (info != NULL) {
*info = fInfo;
}
return true;
}
SkData* SkDecodingImageGenerator::refEncodedData() {
// This functionality is used in `gm --serialize`
// Does not encode options.
if (fData != NULL) {
return SkSafeRef(fData);
}
@ -139,149 +98,111 @@ SkData* SkDecodingImageGenerator::refEncodedData() {
return SkSafeRef(fData);
}
bool SkDecodingImageGenerator::getInfo(SkImageInfo* info) {
// info can be NULL. If so, will update fInfo, fDoCopyTo, and fHasInfo.
if (fHasInfo) {
if (info != NULL) {
*info = fInfo;
}
return true;
}
SkAssertResult(fStream->rewind());
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(fStream));
if (NULL == decoder.get()) {
return false;
}
SkBitmap bitmap;
if (!decoder->decode(fStream, &bitmap,
SkImageDecoder::kDecodeBounds_Mode)) {
return false;
}
if (bitmap.config() == SkBitmap::kNo_Config) {
return false;
}
if (!bitmap.asImageInfo(&fInfo)) {
// We can't use bitmap.config() as is.
if (!bitmap.canCopyTo(SkBitmap::kARGB_8888_Config)) {
SkDEBUGFAIL("!bitmap->canCopyTo(SkBitmap::kARGB_8888_Config)");
return false;
}
fDoCopyTo = true;
fInfo.fWidth = bitmap.width();
fInfo.fHeight = bitmap.height();
fInfo.fColorType = kPMColor_SkColorType;
fInfo.fAlphaType = bitmap.alphaType();
}
if (info != NULL) {
*info = fInfo;
}
fHasInfo = true;
return true;
}
bool SkDecodingImageGenerator::getPixels(const SkImageInfo& info,
void* pixels,
size_t rowBytes) {
if (NULL == pixels) {
return false;
}
if (fInfo != info) {
// The caller has specified a different info. This is an
// error for this kind of SkImageGenerator. Use the Options
// to change the settings.
if (!this->getInfo(NULL)) {
return false;
}
int bpp = SkBitmap::ComputeBytesPerPixel(fRequestedConfig);
if (static_cast<size_t>(bpp * info.fWidth) > rowBytes) {
// The caller has specified a bad rowBytes.
return false;
if (SkImageInfoToBitmapConfig(info) == SkBitmap::kNo_Config) {
return false; // Unsupported SkColorType.
}
SkAssertResult(fStream->rewind());
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(fStream));
if (NULL == decoder.get()) {
return false;
}
decoder->setDitherImage(fDitherImage);
decoder->setSampleSize(fSampleSize);
if (fInfo != info) {
// The caller has specified a different info. For now, this
// is an error. In the future, we will check to see if we can
// convert.
return false;
}
int bpp = SkBitmap::ComputeBytesPerPixel(SkImageInfoToBitmapConfig(info));
if (static_cast<size_t>(bpp * info.fWidth) > rowBytes) {
return false;
}
SkBitmap bitmap;
TargetAllocator allocator(pixels, rowBytes, info.fWidth,
info.fHeight, fRequestedConfig);
if (!bitmap.setConfig(info, rowBytes)) {
return false;
}
TargetAllocator allocator(pixels, rowBytes, info);
if (!fDoCopyTo) {
decoder->setAllocator(&allocator);
bool success = decoder->decode(fStream, &bitmap, fRequestedConfig,
}
bool success = decoder->decode(fStream, &bitmap,
SkImageDecoder::kDecodePixels_Mode);
decoder->setAllocator(NULL);
if (!success) {
return false;
}
if (allocator.isReady()) { // Did not use pixels!
SkBitmap bm;
SkASSERT(bitmap.canCopyTo(fRequestedConfig));
if (!bitmap.copyTo(&bm, fRequestedConfig, &allocator)
|| allocator.isReady()) {
SkDEBUGFAIL("bitmap.copyTo(requestedConfig) failed.");
// Earlier we checked canCopyto(); we expect consistency.
return false;
}
SkASSERT(check_alpha(fInfo.fAlphaType, bm.alphaType()));
} else {
SkASSERT(check_alpha(fInfo.fAlphaType, bitmap.alphaType()));
if (fDoCopyTo) {
SkBitmap bm8888;
bitmap.copyTo(&bm8888, SkBitmap::kARGB_8888_Config, &allocator);
}
return true;
}
SkImageGenerator* SkDecodingImageGenerator::Create(
SkData* data,
const SkDecodingImageGenerator::Options& opts) {
bool SkDecodingImageGenerator::Install(SkData* data, SkBitmap* dst,
SkDiscardableMemory::Factory* factory) {
SkASSERT(data != NULL);
if (NULL == data) {
return NULL;
}
SkStreamRewindable* stream = SkNEW_ARGS(SkMemoryStream, (data));
SkASSERT(stream != NULL);
SkASSERT(stream->unique());
return SkDecodingImageGenerator::Create(data, stream, opts);
SkASSERT(dst != NULL);
SkImageGenerator* gen(SkNEW_ARGS(SkDecodingImageGenerator, (data)));
return SkInstallDiscardablePixelRef(gen, dst, factory);
}
SkImageGenerator* SkDecodingImageGenerator::Create(
SkStreamRewindable* stream,
const SkDecodingImageGenerator::Options& opts) {
bool SkDecodingImageGenerator::Install(SkStreamRewindable* stream,
SkBitmap* dst,
SkDiscardableMemory::Factory* factory) {
SkASSERT(stream != NULL);
SkASSERT(stream->unique());
SkASSERT(dst != NULL);
if ((stream == NULL) || !stream->unique()) {
SkSafeUnref(stream);
return NULL;
return false;
}
return SkDecodingImageGenerator::Create(NULL, stream, opts);
}
// A contructor-type function that returns NULL on failure. This
// prevents the returned SkImageGenerator from ever being in a bad
// state. Called by both Create() functions
SkImageGenerator* SkDecodingImageGenerator::Create(
SkData* data,
SkStreamRewindable* stream,
const SkDecodingImageGenerator::Options& opts) {
SkASSERT(stream);
SkAutoTUnref<SkStreamRewindable> autoStream(stream); // always unref this.
if (opts.fUseRequestedColorType &&
(kIndex_8_SkColorType == opts.fRequestedColorType)) {
// We do not support indexed color with SkImageGenerators,
return NULL;
}
SkAssertResult(autoStream->rewind());
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(autoStream));
if (NULL == decoder.get()) {
return NULL;
}
SkBitmap bitmap;
decoder->setSampleSize(opts.fSampleSize);
if (!decoder->decode(stream, &bitmap,
SkImageDecoder::kDecodeBounds_Mode)) {
return NULL;
}
if (bitmap.config() == SkBitmap::kNo_Config) {
return NULL;
}
SkImageInfo info;
SkBitmap::Config config;
if (!opts.fUseRequestedColorType) {
// Use default config.
if (SkBitmap::kIndex8_Config == bitmap.config()) {
// We don't support kIndex8 because we don't support
// colortables in this workflow.
config = SkBitmap::kARGB_8888_Config;
info.fWidth = bitmap.width();
info.fHeight = bitmap.height();
info.fColorType = kPMColor_SkColorType;
info.fAlphaType = bitmap.alphaType();
} else {
config = bitmap.config(); // Save for later!
if (!bitmap.asImageInfo(&info)) {
SkDEBUGFAIL("Getting SkImageInfo from bitmap failed.");
return NULL;
}
}
} else {
config = SkColorTypeToBitmapConfig(opts.fRequestedColorType);
if (!bitmap.canCopyTo(config)) {
SkASSERT(bitmap.config() != config);
return NULL; // Can not translate to needed config.
}
info.fWidth = bitmap.width();
info.fHeight = bitmap.height();
info.fColorType = opts.fRequestedColorType;
info.fAlphaType = bitmap.alphaType();
// Sanity check.
SkDEBUGCODE(SkColorType tmp;)
SkASSERT(SkBitmapConfigToColorType(config, &tmp));
SkASSERT(tmp == opts.fRequestedColorType);
}
return SkNEW_ARGS(SkDecodingImageGenerator,
(data, autoStream.detach(), info,
opts.fSampleSize, opts.fDitherImage, config));
SkImageGenerator* gen(SkNEW_ARGS(SkDecodingImageGenerator, (stream)));
return SkInstallDiscardablePixelRef(gen, dst, factory);
}

183
src/images/SkDecodingImageGenerator.h
View File

@ -8,134 +8,113 @@
#ifndef SkDecodingImageGenerator_DEFINED
#define SkDecodingImageGenerator_DEFINED
#include "SkBitmap.h"
#include "SkDiscardableMemory.h"
#include "SkImageGenerator.h"
#include "SkImageInfo.h"
class SkData;
class SkBitmap;
class SkStreamRewindable;
/**
* An implementation of SkImageGenerator that calls into
* SkImageDecoder.
* Calls into SkImageDecoder::DecodeMemoryToTarget to implement a
* SkImageGenerator
*/
class SkDecodingImageGenerator : public SkImageGenerator {
public:
virtual ~SkDecodingImageGenerator();
virtual SkData* refEncodedData() SK_OVERRIDE;
// This implementaion of getInfo() always returns true.
virtual bool getInfo(SkImageInfo* info) SK_OVERRIDE;
virtual bool getPixels(const SkImageInfo& info,
void* pixels,
size_t rowBytes) SK_OVERRIDE;
/**
* These options will be passed on to the image decoder. The
* defaults are sensible.
*
* @param fSampleSize If set to > 1, tells the decoder to return a
* smaller than original bitmap, sampling 1 pixel for
* every size pixels. e.g. if sample size is set to 3,
* then the returned bitmap will be 1/3 as wide and high,
* and will contain 1/9 as many pixels as the original.
* Note: this is a hint, and the codec may choose to
* ignore this, or only approximate the sample size.
*
* @param fDitherImage Set to true if the the decoder should try to
* dither the resulting image when decoding to a smaller
* color-space. The default is true.
*
* @param fRequestedColorType If not given, then use whichever
* config the decoder wants. Else try to use this color
* type. If the decoder won't support this color type,
* SkDecodingImageGenerator::Create will return
* NULL. kIndex_8_SkColorType is not supported.
/*
* The constructor will take a reference to the SkData. The
* destructor will unref() it.
*/
struct Options {
Options()
: fSampleSize(1)
, fDitherImage(true)
, fUseRequestedColorType(false)
, fRequestedColorType() { }
Options(int sampleSize, bool dither)
: fSampleSize(sampleSize)
, fDitherImage(dither)
, fUseRequestedColorType(false)
, fRequestedColorType() { }
Options(int sampleSize, bool dither, SkColorType colorType)
: fSampleSize(sampleSize)
, fDitherImage(dither)
, fUseRequestedColorType(true)
, fRequestedColorType(colorType) { }
const int fSampleSize;
const bool fDitherImage;
const bool fUseRequestedColorType;
const SkColorType fRequestedColorType;
};
explicit SkDecodingImageGenerator(SkData* data);
/**
* These two functions return a SkImageGenerator that calls into
* SkImageDecoder. They return NULL on failure.
/*
* The SkData version of this constructor is preferred. If the
* stream has an underlying SkData (such as a SkMemoryStream)
* pass that in.
*
* The SkData version of this function is preferred. If the stream
* has an underlying SkData (such as a SkMemoryStream) pass that in.
*
* This object will unref the stream when done or on failure. Since
* streams have internal state (position), the caller should not pass
* a shared stream in. Pass either a new duplicated stream in or
* transfer ownership of the stream. This factory asserts
* This object will unref the stream when done. Since streams
* have internal state (position), the caller should not pass a
* shared stream in. Pass either a new duplicated stream in or
* transfer ownership of the stream. In the latter case, be sure
* that there are no other consumers of the stream who will
* modify the stream's position. This constructor asserts
* stream->unique().
*
* For example:
* SkStreamRewindable* stream;
* ...
* SkImageGenerator* gen
* = SkDecodingImageGenerator::Create(
* stream->duplicate(), SkDecodingImageGenerator::Options());
* = SkNEW_ARGS(SkDecodingImageGenerator,
* (stream->duplicate()));
* ...
* SkDELETE(gen);
*
* @param Options (see above)
*
* @return NULL on failure, a new SkImageGenerator on success.
*/
static SkImageGenerator* Create(SkStreamRewindable* stream,
const Options& opt);
explicit SkDecodingImageGenerator(SkStreamRewindable* stream);
virtual ~SkDecodingImageGenerator();
virtual SkData* refEncodedData() SK_OVERRIDE;
virtual bool getInfo(SkImageInfo* info) SK_OVERRIDE;
virtual bool getPixels(const SkImageInfo& info,
void* pixels,
size_t rowBytes) SK_OVERRIDE;
/**
* @param data Contains the encoded image data that will be used by
* the SkDecodingImageGenerator. Will be ref()ed by the
* SkImageGenerator constructor and and unref()ed on deletion.
* Install the SkData into the destination bitmap, using a new
* SkDiscardablePixelRef and a new SkDecodingImageGenerator.
*
* @param data Contains the encoded image data that will be used
* by the SkDecodingImageGenerator. Will be ref()ed.
*
* @param destination Upon success, this bitmap will be
* configured and have a pixelref installed.
*
* @param factory If not NULL, this object will be used as a
* source of discardable memory when decoding. If NULL, then
* SkDiscardableMemory::Create() will be called.
*
* @return true iff successful.
*/
static SkImageGenerator* Create(SkData* data, const Options& opt);
static bool Install(SkData* data, SkBitmap* destination,
SkDiscardableMemory::Factory* factory = NULL);
/**
* Install the stream into the destination bitmap, using a new
* SkDiscardablePixelRef and a new SkDecodingImageGenerator.
*
* The SkData version of this function is preferred. If the
* stream has an underlying SkData (such as a SkMemoryStream)
* pass that in.
*
* @param stream The source of encoded data that will be passed
* to the decoder. The installed SkDecodingImageGenerator will
* unref the stream when done. If false is returned, this
* function will perform the unref. Since streams have internal
* state (position), the caller should not pass a shared stream
* in. Pass either a new duplicated stream in or transfer
* ownership of the stream. In the latter case, be sure that
* there are no other consumers of the stream who will modify the
* stream's position. This function will fail if
* (!stream->unique()).
*
* @param destination Upon success, this bitmap will be
* configured and have a pixelref installed.
*
* @param factory If not NULL, this object will be used as a
* source of discardable memory when decoding. If NULL, then
* SkDiscardableMemory::Create() will be called.
*
* @return true iff successful.
*/
static bool Install(SkStreamRewindable* stream, SkBitmap* destination,
SkDiscardableMemory::Factory* factory = NULL);
private:
SkData* fData;
SkStreamRewindable* fStream;
const SkImageInfo fInfo;
const int fSampleSize;
const bool fDitherImage;
const SkBitmap::Config fRequestedConfig;
SkDecodingImageGenerator(SkData* data,
SkStreamRewindable* stream,
const SkImageInfo& info,
int sampleSize,
bool ditherImage,
SkBitmap::Config requestedConfig);
static SkImageGenerator* Create(SkData*, SkStreamRewindable*,
const Options&);
typedef SkImageGenerator INHERITED;
SkImageInfo fInfo;
bool fHasInfo;
bool fDoCopyTo;
};
// // Example of most basic use case:
//
// bool install_data(SkData* data, SkBitmap* dst) {
// return SkInstallDiscardablePixelRef(
// SkDecodingImageGenerator::Create(
// data, SkDecodingImageGenerator::Options()), dst, NULL);
// }
// bool install_stream(SkStreamRewindable* stream, SkBitmap* dst) {
// return SkInstallDiscardablePixelRef(
// SkDecodingImageGenerator::Create(
// stream, SkDecodingImageGenerator::Options()), dst, NULL);
// }
#endif // SkDecodingImageGenerator_DEFINED

1
src/lazy/SkCachingPixelRef.cpp
View File

@ -12,6 +12,7 @@
bool SkCachingPixelRef::Install(SkImageGenerator* generator,
SkBitmap* dst) {
SkImageInfo info;
SkASSERT(generator != NULL);
SkASSERT(dst != NULL);
if ((NULL == generator)
|| !(generator->getInfo(&info))

13
src/lazy/SkDiscardablePixelRef.cpp
View File

@ -72,19 +72,20 @@ bool SkInstallDiscardablePixelRef(SkImageGenerator* generator,
SkBitmap* dst,
SkDiscardableMemory::Factory* factory) {
SkImageInfo info;
SkAutoTDelete<SkImageGenerator> autoGenerator(generator);
if ((NULL == autoGenerator.get())
|| (!autoGenerator->getInfo(&info))
SkASSERT(generator != NULL);
if ((NULL == generator)
|| (!generator->getInfo(&info))
|| (!dst->setConfig(info, 0))) {
SkDELETE(generator);
return false;
}
SkASSERT(dst->config() != SkBitmap::kNo_Config);
if (dst->empty()) { // Use a normal pixelref.
SkDELETE(generator); // Do not need this anymore.
return dst->allocPixels(NULL, NULL);
}
SkAutoTUnref<SkDiscardablePixelRef> ref(
SkNEW_ARGS(SkDiscardablePixelRef,
(info, autoGenerator.detach(), dst->rowBytes(), factory)));
SkAutoTUnref<SkDiscardablePixelRef> ref(SkNEW_ARGS(SkDiscardablePixelRef,
(info, generator, dst->rowBytes(), factory)));
dst->setPixelRef(ref);
return true;
}

9
src/lazy/SkDiscardablePixelRef.h
View File

@ -13,15 +13,6 @@
#include "SkImageInfo.h"
#include "SkPixelRef.h"
/**
* A PixelRef backed by SkDiscardableMemory, with the ability to
* re-generate the pixels (via a SkImageGenerator) if the DM is
* purged.
*
* Since SkColorTable is reference-counted, we do not support indexed
* color with this class; there would be no way for the discardable
* memory system to unref the color table.
*/
class SkDiscardablePixelRef : public SkPixelRef {
public:
SK_DECLARE_UNFLATTENABLE_OBJECT()

9
tests/CachedDecodingPixelRefTest.cpp
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@ -146,14 +146,11 @@ static void test_three_encodings(skiatest::Reporter* reporter,
////////////////////////////////////////////////////////////////////////////////
static bool install_skCachingPixelRef(SkData* encoded, SkBitmap* dst) {
return SkCachingPixelRef::Install(
SkDecodingImageGenerator::Create(
encoded, SkDecodingImageGenerator::Options()), dst);
SkNEW_ARGS(SkDecodingImageGenerator, (encoded)), dst);
}
static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
// Use system-default discardable memory.
return SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(
encoded, SkDecodingImageGenerator::Options()), dst, NULL);
return SkDecodingImageGenerator::Install(encoded, dst, NULL);
}
////////////////////////////////////////////////////////////////////////////////
@ -216,12 +213,10 @@ public:
}
return true;
}
private:
const TestType fType;
skiatest::Reporter* const fReporter;
};
void CheckTestImageGeneratorBitmap(skiatest::Reporter* reporter,
const SkBitmap& bm) {
REPORTER_ASSERT(reporter, TestImageGenerator::Width() == bm.width());

229
tests/ImageDecodingTest.cpp
View File

@ -12,14 +12,10 @@
#include "SkColor.h"
#include "SkColorPriv.h"
#include "SkData.h"
#include "SkDecodingImageGenerator.h"
#include "SkDiscardableMemoryPool.h"
#include "SkForceLinking.h"
#include "SkGradientShader.h"
#include "SkImageDecoder.h"
#include "SkImageEncoder.h"
#include "SkImageGenerator.h"
#include "SkImagePriv.h"
#include "SkOSFile.h"
#include "SkPoint.h"
#include "SkShader.h"
@ -240,228 +236,3 @@ DEF_TEST(ImageDecoding, reporter) {
test_row_proc_choice();
#endif
}
////////////////////////////////////////////////////////////////////////////////
// example of how Android will do this inside their BitmapFactory
static SkPixelRef* install_pixel_ref(SkBitmap* bitmap,
SkStreamRewindable* stream,
int sampleSize, bool ditherImage) {
SkASSERT(bitmap != NULL);
SkASSERT(stream != NULL);
SkASSERT(stream->rewind());
SkASSERT(stream->unique());
SkColorType colorType;
if (!SkBitmapConfigToColorType(bitmap->config(), &colorType)) {
return NULL;
}
SkDecodingImageGenerator::Options opts(sampleSize, ditherImage, colorType);
SkAutoTDelete<SkImageGenerator> gen(
SkDecodingImageGenerator::Create(stream, opts));
SkImageInfo info;
if ((NULL == gen.get()) || !gen->getInfo(&info)) {
return NULL;
}
SkDiscardableMemory::Factory* factory = NULL;
if (info.getSafeSize(info.minRowBytes()) < (32 * 1024)) {
// only use ashmem for large images, since mmaps come at a price
factory = SkGetGlobalDiscardableMemoryPool();
}
if (SkInstallDiscardablePixelRef(gen.detach(), bitmap, factory)) {
return bitmap->pixelRef();
}
return NULL;
}
/**
* A test for the SkDecodingImageGenerator::Create and
* SkInstallDiscardablePixelRef functions.
*/
DEF_TEST(ImprovedBitmapFactory, reporter) {
SkString resourcePath = skiatest::Test::GetResourcePath();
SkString directory = SkOSPath::SkPathJoin(resourcePath.c_str(), "encoding");
SkString path = SkOSPath::SkPathJoin(directory.c_str(), "randPixels.png");
SkAutoTUnref<SkStreamRewindable> stream(
SkStream::NewFromFile(path.c_str()));
if (sk_exists(path.c_str())) {
SkBitmap bm;
SkAssertResult(bm.setConfig(SkBitmap::kARGB_8888_Config, 1, 1));
REPORTER_ASSERT(reporter,
NULL != install_pixel_ref(&bm, stream.detach(), 1, true));
SkAutoLockPixels alp(bm);
REPORTER_ASSERT(reporter, NULL != bm.getPixels());
}
}
////////////////////////////////////////////////////////////////////////////////
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
static inline bool check_rounding(int value, int dividend, int divisor) {
// returns true if (dividend/divisor) rounds up OR down to value
return (((divisor * value) > (dividend - divisor))
&& ((divisor * value) < (dividend + divisor)));
}
#endif // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
namespace {
// expected output for 8x8 bitmap
const int kExpectedWidth = 8;
const int kExpectedHeight = 8;
const SkColor kExpectedPixels[] = {
0xffbba570, 0xff395f5d, 0xffe25c39, 0xff197666,
0xff3cba27, 0xffdefcb0, 0xffc13874, 0xfffa0093,
0xffbda60e, 0xffc01db6, 0xff2bd688, 0xff9362d4,
0xffc641b2, 0xffa5cede, 0xff606eba, 0xff8f4bf3,
0xff3bf742, 0xff8f02a8, 0xff5509df, 0xffc7027e,
0xff24aa8a, 0xff886c96, 0xff625481, 0xff403689,
0xffc52152, 0xff78ccd6, 0xffdcb4ab, 0xff09d27d,
0xffca00f3, 0xff605d47, 0xff446fb2, 0xff576e46,
0xff273df9, 0xffb41a83, 0xfff812c3, 0xffccab67,
0xff034218, 0xff7db9a7, 0xff821048, 0xfffe4ab4,
0xff6fac98, 0xff941d27, 0xff5fe411, 0xfffbb283,
0xffd86e99, 0xff169162, 0xff71128c, 0xff39cab4,
0xffa7fe63, 0xff4c956b, 0xffbc22e0, 0xffb272e4,
0xff129f4a, 0xffe34513, 0xff3d3742, 0xffbd190a,
0xffb07222, 0xff2e23f8, 0xfff089d9, 0xffb35738,
0xffa86022, 0xff3340fe, 0xff95fe71, 0xff6a71df
};
SK_COMPILE_ASSERT((kExpectedWidth * kExpectedHeight)
== SK_ARRAY_COUNT(kExpectedPixels), array_size_mismatch);
} // namespace
/**
* Given either a SkStream or a SkData, try to decode the encoded
* image using the specified options and report errors.
*/
static void test_options(skiatest::Reporter* reporter,
const SkDecodingImageGenerator::Options& opts,
SkStreamRewindable* encodedStream,
SkData* encodedData,
bool useData,
const SkString& path) {
SkBitmap bm;
bool success = false;
if (useData) {
if (NULL == encodedData) {
return;
}
success = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(encodedData, opts), &bm, NULL);
} else {
if (NULL == encodedStream) {
return;
}
success = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(encodedStream->duplicate(), opts),
&bm, NULL);
}
REPORTER_ASSERT(reporter, success
|| (kARGB_4444_SkColorType == opts.fRequestedColorType));
if (!success) {
return;
}
#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
// Android is the only system that use Skia's image decoders in
// production. For now, we'll only verify that samplesize works
// on systems where it already is known to work.
REPORTER_ASSERT(reporter, check_rounding(bm.height(), kExpectedHeight,
opts.fSampleSize));
REPORTER_ASSERT(reporter, check_rounding(bm.width(), kExpectedWidth,
opts.fSampleSize));
#endif // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
SkAutoLockPixels alp(bm);
REPORTER_ASSERT(reporter, bm.getPixels() != NULL);
SkBitmap::Config requestedConfig
= SkColorTypeToBitmapConfig(opts.fRequestedColorType);
REPORTER_ASSERT(reporter,
(!opts.fUseRequestedColorType)
|| (bm.config() == requestedConfig));
// Condition under which we should check the decoding results:
if ((SkBitmap::kARGB_8888_Config == bm.config())
&& (NULL != bm.getPixels())
&& (!path.endsWith(".jpg")) // lossy
&& (!path.endsWith(".webp")) // decoder error
&& (opts.fSampleSize == 1)) { // scaled
bool pixelError = false;
const SkColor* correctPixels = kExpectedPixels;
SkASSERT(bm.height() == kExpectedHeight);
SkASSERT(bm.width() == kExpectedWidth);
for (int y = 0; y < bm.height(); ++y) {
for (int x = 0; x < bm.width(); ++x) {
pixelError |= (*correctPixels != bm.getColor(x, y));
++correctPixels;
}
}
REPORTER_ASSERT(reporter, !pixelError);
}
}
/**
* SkDecodingImageGenerator has an Options struct which lets the
* client of the generator set sample size, dithering, and bitmap
* config. This test loops through many possible options and tries
* them on a set of 5 small encoded images (each in a different
* format). We test both SkData and SkStreamRewindable decoding.
*/
DEF_TEST(ImageDecoderOptions, reporter) {
const char* files[] = {
"randPixels.bmp",
"randPixels.jpg",
"randPixels.png",
"randPixels.webp",
"randPixels.gif"
};
SkString resourceDir = skiatest::Test::GetResourcePath();
SkString directory = SkOSPath::SkPathJoin(resourceDir.c_str(), "encoding");
if (!sk_exists(directory.c_str())) {
return;
}
int scaleList[] = {1, 2, 3, 4};
bool ditherList[] = {true, false};
SkColorType colorList[] = {
kAlpha_8_SkColorType,
kRGB_565_SkColorType,
kARGB_4444_SkColorType, // Most decoders will fail on 4444.
kPMColor_SkColorType
// Note that indexed color is left out of the list. Lazy
// decoding doesn't do indexed color.
};
const bool useDataList[] = {true, false};
for (size_t fidx = 0; fidx < SK_ARRAY_COUNT(files); ++fidx) {
SkString path = SkOSPath::SkPathJoin(directory.c_str(), files[fidx]);
if (!sk_exists(path.c_str())) {
continue;
}
SkAutoDataUnref encodedData(SkData::NewFromFileName(path.c_str()));
REPORTER_ASSERT(reporter, encodedData.get() != NULL);
SkAutoTUnref<SkStreamRewindable> encodedStream(
SkStream::NewFromFile(path.c_str()));
REPORTER_ASSERT(reporter, encodedStream.get() != NULL);
for (size_t i = 0; i < SK_ARRAY_COUNT(scaleList); ++i) {
for (size_t j = 0; j < SK_ARRAY_COUNT(ditherList); ++j) {
for (size_t m = 0; m < SK_ARRAY_COUNT(useDataList); ++m) {
for (size_t k = 0; k < SK_ARRAY_COUNT(colorList); ++k) {
SkDecodingImageGenerator::Options opts(scaleList[i],
ditherList[j],
colorList[k]);
test_options(reporter, opts, encodedStream, encodedData,
useDataList[m], path);
}
SkDecodingImageGenerator::Options options(scaleList[i],
ditherList[j]);
test_options(reporter, options, encodedStream, encodedData,
useDataList[m], path);
}
}
}
}
}

7
tests/PictureTest.cpp
View File

@ -13,8 +13,6 @@
#include "SkData.h"
#include "SkDecodingImageGenerator.h"
#include "SkError.h"
#include "SkImageEncoder.h"
#include "SkImageGenerator.h"
#include "SkPaint.h"
#include "SkPicture.h"
#include "SkPictureUtils.h"
@ -340,6 +338,8 @@ static void test_bad_bitmap() {
}
#endif
#include "SkImageEncoder.h"
static SkData* encode_bitmap_to_data(size_t* offset, const SkBitmap& bm) {
*offset = 0;
return SkImageEncoder::EncodeData(bm, SkImageEncoder::kPNG_Type, 100);
@ -381,8 +381,7 @@ static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
SkAutoDataUnref data(wStream.copyToData());
SkBitmap bm;
bool installSuccess = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(data, SkDecodingImageGenerator::Options()), &bm, NULL);
bool installSuccess = SkDecodingImageGenerator::Install(data, &bm);
REPORTER_ASSERT(reporter, installSuccess);
// Write both bitmaps to pictures, and ensure that the resulting data streams are the same.

7
tools/LazyDecodeBitmap.cpp
View File

@ -31,11 +31,10 @@ bool sk_tools::LazyDecodeBitmap(const void* src,
return false;
}
SkAutoTDelete<SkImageGenerator> gen(
SkDecodingImageGenerator::Create(
data, SkDecodingImageGenerator::Options()));
SkAutoTDelete<SkImageGenerator> gen(SkNEW_ARGS(SkDecodingImageGenerator,
(data)));
SkImageInfo info;
if ((NULL == gen.get()) || !gen->getInfo(&info)) {
if (!gen->getInfo(&info)) {
return false;
}
SkDiscardableMemory::Factory* pool = NULL;