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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkCanvas.h"
#include "SkPipe.h"
#include "SkPaint.h"
#include "SkStream.h"
#include "SkSurface.h"
#include "Test.h"
#include "SkNullCanvas.h"
#include "SkAutoPixmapStorage.h"
static void drain(SkPipeDeserializer* deserial, SkDynamicMemoryWStream* stream) {
std::unique_ptr<SkCanvas> canvas(SkCreateNullCanvas());
sk_sp<SkData> data = stream->detachAsData();
deserial->playback(data->data(), data->size(), canvas.get());
}
static sk_sp<SkImage> drain_as_image(SkPipeDeserializer* deserial, SkDynamicMemoryWStream* stream) {
sk_sp<SkData> data = stream->detachAsData();
return deserial->readImage(data->data(), data->size());
}
static bool deep_equal(SkImage* a, SkImage* b) {
if (a->width() != b->width() || a->height() != b->height()) {
return false;
}
const SkImageInfo info = SkImageInfo::MakeN32Premul(a->width(), a->height());
SkAutoPixmapStorage pmapA, pmapB;
pmapA.alloc(info);
pmapB.alloc(info);
if (!a->readPixels(pmapA, 0, 0) || !b->readPixels(pmapB, 0, 0)) {
return false;
}
for (int y = 0; y < info.height(); ++y) {
if (memcmp(pmapA.addr32(0, y), pmapB.addr32(0, y), info.width() * sizeof(SkPMColor))) {
return false;
}
}
return true;
}
DEF_TEST(Pipe_image, reporter) {
sk_sp<SkImage> img = GetResourceAsImage("mandrill_128.png");
SkASSERT(img.get());
SkPipeSerializer serializer;
SkPipeDeserializer deserializer;
SkDynamicMemoryWStream stream;
SkCanvas* wc = serializer.beginWrite(SkRect::MakeWH(100, 100), &stream);
wc->drawImage(img, 0, 0, nullptr);
serializer.endWrite();
size_t offset0 = stream.bytesWritten();
REPORTER_ASSERT(reporter, offset0 > 100); // the raw image must be sorta big
drain(&deserializer, &stream);
// try drawing the same image again -- it should be much smaller
wc = serializer.beginWrite(SkRect::MakeWH(100, 100), &stream);
wc->drawImage(img, 0, 0, nullptr);
size_t offset1 = stream.bytesWritten();
serializer.endWrite();
REPORTER_ASSERT(reporter, offset1 <= 32);
drain(&deserializer, &stream);
// try serializing the same image directly, again it should be small
serializer.write(img.get(), &stream);
size_t offset2 = stream.bytesWritten();
REPORTER_ASSERT(reporter, offset2 <= 32);
auto img1 = drain_as_image(&deserializer, &stream);
REPORTER_ASSERT(reporter, deep_equal(img.get(), img1.get()));
// try serializing the same image directly (again), check that it is the same!
serializer.write(img.get(), &stream);
size_t offset3 = stream.bytesWritten();
REPORTER_ASSERT(reporter, offset3 <= 32);
auto img2 = drain_as_image(&deserializer, &stream);
REPORTER_ASSERT(reporter, img1.get() == img2.get());
}
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