void onOnceBeforeDraw() override {
// Copyright-free file from http://openclipart.org/detail/29213/paper-plane-by-ddoo
SkString pngFilename = GetResourcePath("plane.png");
SkAutoDataUnref data(SkData::NewFromFileName(pngFilename.c_str()));
if (data.get()) {
// Create a cache which will boot the pixels out anytime the
// bitmap is unlocked.
SkAutoTUnref<SkDiscardableMemoryPool> pool(
SkDiscardableMemoryPool::Create(1));
SkAssertResult(SkInstallDiscardablePixelRef(SkImageGenerator::NewFromData(data),
NULL, &fBitmap, pool));
}
}
// 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());
SkColorType colorType = bitmap->colorType();
SkDecodingImageGenerator::Options opts(sampleSize, ditherImage, colorType);
if (SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(stream, opts), bitmap)) {
return bitmap->pixelRef();
}
return NULL;
}
void onDraw(SkCanvas* canvas) override {
SkBitmap bm;
SkString filename = GetResourcePath("mandrill_128.");
filename.append(this->fileExtension());
SkAutoTUnref<SkData> fileData(SkData::NewFromFileName(filename.c_str()));
if (nullptr == fileData) {
SkDebugf("Could not open the file. Did you forget to set the resourcePath?\n");
return;
}
if (!SkInstallDiscardablePixelRef(fileData, &bm)) {
SkDebugf("Could not install discardable pixel ref.\n");
return;
}
canvas->drawBitmap(bm, 0, 0);
}
// Creates a SkBitmap that is backed by SkDiscardablePixelRef.
SkBitmap DeferredImageDecoder::createBitmap(size_t index)
{
SkISize decodedSize = m_frameGenerator->getFullSize();
ASSERT(decodedSize.width() > 0);
ASSERT(decodedSize.height() > 0);
#if SK_B32_SHIFT // Little-endian RGBA pixels. (Android)
const SkColorType colorType = kRGBA_8888_SkColorType;
#else
const SkColorType colorType = kBGRA_8888_SkColorType;
#endif
const SkImageInfo info = SkImageInfo::Make(decodedSize.width(), decodedSize.height(), colorType, kPremul_SkAlphaType);
SkBitmap bitmap;
DecodingImageGenerator* generator = new DecodingImageGenerator(m_frameGenerator, info, index);
bool installed = SkInstallDiscardablePixelRef(generator, &bitmap);
ASSERT_UNUSED(installed, installed);
bitmap.pixelRef()->setURI(labelDiscardable);
generator->setGenerationId(bitmap.getGenerationID());
return bitmap;
}
// Fits SkPicture::InstallPixelRefProc call signature.
// Used in SkPictureData::CreateFromStream
bool sk_tools::LazyDecodeBitmap(const void* src,
size_t length,
SkBitmap* dst) {
SkAutoDataUnref data(SkData::NewWithCopy(src, length));
if (NULL == data.get()) {
return false;
}
SkAutoTDelete<SkImageGenerator> gen(SkImageGenerator::NewFromData(data));
SkImageInfo info;
if ((NULL == gen.get()) || !gen->getInfo(&info)) {
return false;
}
SkDiscardableMemory::Factory* pool = NULL;
if ((!FLAGS_useVolatileCache) || (info.width() * info.height() < 32 * 1024)) {
// how to do switching with SkDiscardableMemory.
pool = SkGetGlobalDiscardableMemoryPool();
// Only meaningful if platform has a default discardable
// memory implementation that differs from the global DM pool.
}
return SkInstallDiscardablePixelRef(gen.detach(), dst, pool);
}
static void check_pixelref(TestImageGenerator::TestType type,
skiatest::Reporter* reporter,
PixelRefType pixelRefType,
SkDiscardableMemory::Factory* factory) {
SkASSERT((pixelRefType >= 0) && (pixelRefType <= kLast_PixelRefType));
SkAutoTDelete<SkImageGenerator> gen(SkNEW_ARGS(TestImageGenerator,
(type, reporter)));
REPORTER_ASSERT(reporter, gen.get() != NULL);
SkBitmap lazy;
bool success;
if (kSkCaching_PixelRefType == pixelRefType) {
// Ignore factory; use global cache.
success = SkCachingPixelRef::Install(gen.detach(), &lazy);
} else {
success = SkInstallDiscardablePixelRef(gen.detach(), NULL, &lazy, factory);
}
REPORTER_ASSERT(reporter, success);
if (TestImageGenerator::kSucceedGetPixels_TestType == type) {
check_test_image_generator_bitmap(reporter, lazy);
} else if (TestImageGenerator::kFailGetPixels_TestType == type) {
SkAutoLockPixels autoLockPixels(lazy);
REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
}
}
// This is the public API
bool SkInstallDiscardablePixelRef(SkImageGenerator* generator, SkBitmap* dst) {
return SkInstallDiscardablePixelRef(generator, dst, NULL);
}
// Returned bitmap is lazy. Only lazy bitmaps hold onto the original data.
static SkBitmap bitmap_from_data(SkData* data) {
SkASSERT(data);
SkBitmap bm;
SkInstallDiscardablePixelRef(data, &bm);
return bm;
}
static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
// Use system-default discardable memory.
return SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(
encoded, SkDecodingImageGenerator::Options()), dst);
}
static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
// Use system-default discardable memory.
return SkInstallDiscardablePixelRef(encoded, dst);
}
bool GetResourceAsBitmap(const char* resource, SkBitmap* dst) {
SkString resourcePath = GetResourcePath(resource);
SkAutoTUnref<SkData> resourceData(
SkData::NewFromFileName(resourcePath.c_str()));
return resourceData && SkInstallDiscardablePixelRef(resourceData, dst);
}
/**
* 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);
} else {
if (NULL == encodedStream) {
return;
}
success = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(encodedStream->duplicate(), opts), &bm);
}
if (!success) {
if (opts.fUseRequestedColorType
&& (kARGB_4444_SkColorType == opts.fRequestedColorType)) {
return; // Ignore known conversion inabilities.
}
// If we get here, it's a failure and we will need more
// information about why it failed.
ERRORF(reporter, "Bounds decode failed [sampleSize=%d dither=%s "
"colorType=%s %s]", opts.fSampleSize, yn(opts.fDitherImage),
options_colorType(opts), path.c_str());
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));
// The ImageDecoder API doesn't guarantee that SampleSize does
// anything at all, but the decoders that this test excercises all
// produce an output size in the following range:
// (((sample_size * out_size) > (in_size - sample_size))
// && out_size <= SkNextPow2(((in_size - 1) / sample_size) + 1));
#endif // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
SkAutoLockPixels alp(bm);
if (bm.getPixels() == NULL) {
ERRORF(reporter, "Pixel decode failed [sampleSize=%d dither=%s "
"colorType=%s %s]", opts.fSampleSize, yn(opts.fDitherImage),
options_colorType(opts), path.c_str());
return;
}
SkColorType requestedColorType = opts.fRequestedColorType;
REPORTER_ASSERT(reporter,
(!opts.fUseRequestedColorType)
|| (bm.colorType() == requestedColorType));
// Condition under which we should check the decoding results:
if ((kN32_SkColorType == bm.colorType())
&& (!path.endsWith(".jpg")) // lossy
&& (opts.fSampleSize == 1)) { // scaled
const SkColor* correctPixels = kExpectedPixels;
SkASSERT(bm.height() == kExpectedHeight);
SkASSERT(bm.width() == kExpectedWidth);
int pixelErrors = 0;
for (int y = 0; y < bm.height(); ++y) {
for (int x = 0; x < bm.width(); ++x) {
if (*correctPixels != bm.getColor(x, y)) {
++pixelErrors;
}
++correctPixels;
}
}
if (pixelErrors != 0) {
ERRORF(reporter, "Pixel-level mismatch (%d of %d) "
"[sampleSize=%d dither=%s colorType=%s %s]",
pixelErrors, kExpectedHeight * kExpectedWidth,
opts.fSampleSize, yn(opts.fDitherImage),
options_colorType(opts), path.c_str());
}
}
}
bool SkInstallDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
SkImageGenerator* generator = SkImageGenerator::NewFromEncoded(encoded);
return generator ? SkInstallDiscardablePixelRef(generator, NULL, dst, NULL) : false;
}