9552662e9f
This recreates SkImageDecoder's feature to skip writing zeroes for SkCodec. Review URL: https://codereview.chromium.org/980903002
358 lines
13 KiB
C++
358 lines
13 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkBitmap.h"
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#include "SkCachingPixelRef.h"
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#include "SkCanvas.h"
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#include "SkData.h"
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#include "SkDiscardableMemoryPool.h"
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#include "SkImageDecoder.h"
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#include "SkImageGeneratorPriv.h"
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#include "SkResourceCache.h"
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#include "SkStream.h"
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#include "SkUtils.h"
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#include "Test.h"
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/**
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* Fill this bitmap with some color.
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*/
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static void make_test_image(SkBitmap* bm) {
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const int W = 50, H = 50;
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bm->allocN32Pixels(W, H);
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bm->eraseColor(SK_ColorBLACK);
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SkCanvas canvas(*bm);
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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canvas.drawRectCoords(0, 0, SkIntToScalar(W/2),
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SkIntToScalar(H/2), paint);
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paint.setColor(SK_ColorWHITE);
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canvas.drawRectCoords(SkIntToScalar(W/2), SkIntToScalar(H/2),
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SkIntToScalar(W), SkIntToScalar(H), paint);
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}
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/**
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* encode this bitmap into some data via SkImageEncoder
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*/
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static SkData* create_data_from_bitmap(const SkBitmap& bm,
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SkImageEncoder::Type type) {
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SkDynamicMemoryWStream stream;
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if (SkImageEncoder::EncodeStream(&stream, bm, type, 100)) {
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return stream.copyToData();
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}
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return NULL;
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}
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////////////////////////////////////////////////////////////////////////////////
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static void compare_bitmaps(skiatest::Reporter* reporter,
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const SkBitmap& b1, const SkBitmap& b2,
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bool pixelPerfect = true) {
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REPORTER_ASSERT(reporter, b1.empty() == b2.empty());
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REPORTER_ASSERT(reporter, b1.width() == b2.width());
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REPORTER_ASSERT(reporter, b1.height() == b2.height());
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REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull());
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SkAutoLockPixels autoLockPixels1(b1);
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SkAutoLockPixels autoLockPixels2(b2);
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REPORTER_ASSERT(reporter, b1.isNull() == b2.isNull());
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if (b1.isNull() || b1.empty()) {
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return;
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}
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REPORTER_ASSERT(reporter, b1.getPixels());
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REPORTER_ASSERT(reporter, b2.getPixels());
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if ((!(b1.getPixels())) || (!(b2.getPixels()))) {
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return;
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}
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if ((b1.width() != b2.width()) ||
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(b1.height() != b2.height())) {
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return;
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}
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if (!pixelPerfect) {
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return;
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}
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int pixelErrors = 0;
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for (int y = 0; y < b2.height(); ++y) {
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for (int x = 0; x < b2.width(); ++x) {
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if (b1.getColor(x, y) != b2.getColor(x, y)) {
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++pixelErrors;
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}
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}
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}
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REPORTER_ASSERT(reporter, 0 == pixelErrors);
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}
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typedef bool (*InstallEncoded)(SkData* encoded, SkBitmap* dst);
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/**
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This function tests three differently encoded images against the
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original bitmap */
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static void test_three_encodings(skiatest::Reporter* reporter,
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InstallEncoded install) {
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SkBitmap original;
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make_test_image(&original);
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REPORTER_ASSERT(reporter, !original.empty());
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REPORTER_ASSERT(reporter, !original.isNull());
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if (original.empty() || original.isNull()) {
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return;
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}
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static const SkImageEncoder::Type types[] = {
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SkImageEncoder::kPNG_Type,
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SkImageEncoder::kJPEG_Type,
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SkImageEncoder::kWEBP_Type
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(types); i++) {
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SkImageEncoder::Type type = types[i];
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SkAutoDataUnref encoded(create_data_from_bitmap(original, type));
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REPORTER_ASSERT(reporter, encoded.get() != NULL);
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if (NULL == encoded.get()) {
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continue;
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}
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SkBitmap lazy;
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bool installSuccess = install(encoded.get(), &lazy);
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REPORTER_ASSERT(reporter, installSuccess);
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if (!installSuccess) {
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continue;
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}
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REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
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{
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SkAutoLockPixels autoLockPixels(lazy); // now pixels are good.
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REPORTER_ASSERT(reporter, lazy.getPixels());
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if (NULL == lazy.getPixels()) {
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continue;
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}
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}
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// pixels should be gone!
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REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
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{
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SkAutoLockPixels autoLockPixels(lazy); // now pixels are good.
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REPORTER_ASSERT(reporter, lazy.getPixels());
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if (NULL == lazy.getPixels()) {
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continue;
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}
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}
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bool comparePixels = (SkImageEncoder::kPNG_Type == type);
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compare_bitmaps(reporter, original, lazy, comparePixels);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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static bool install_skCachingPixelRef(SkData* encoded, SkBitmap* dst) {
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return SkCachingPixelRef::Install(SkImageGenerator::NewFromData(encoded), dst);
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}
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static bool install_skDiscardablePixelRef(SkData* encoded, SkBitmap* dst) {
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// Use system-default discardable memory.
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return SkInstallDiscardablePixelRef(encoded, dst);
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}
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////////////////////////////////////////////////////////////////////////////////
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/**
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* This checks to see that a SkCachingPixelRef and a
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* SkDiscardablePixelRef works as advertised with a
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* SkDecodingImageGenerator.
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*/
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DEF_TEST(DecodingImageGenerator, reporter) {
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test_three_encodings(reporter, install_skCachingPixelRef);
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test_three_encodings(reporter, install_skDiscardablePixelRef);
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}
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class TestImageGenerator : public SkImageGenerator {
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public:
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enum TestType {
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kFailGetInfo_TestType,
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kFailGetPixels_TestType,
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kSucceedGetPixels_TestType,
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kLast_TestType = kSucceedGetPixels_TestType
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};
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static int Width() { return 10; }
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static int Height() { return 10; }
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static uint32_t Color() { return 0xff123456; }
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TestImageGenerator(TestType type, skiatest::Reporter* reporter)
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: fType(type), fReporter(reporter) {
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SkASSERT((fType <= kLast_TestType) && (fType >= 0));
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}
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virtual ~TestImageGenerator() { }
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protected:
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bool onGetInfo(SkImageInfo* info) SK_OVERRIDE {
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REPORTER_ASSERT(fReporter, info);
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if ((NULL == info) || (kFailGetInfo_TestType == fType)) {
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return false;
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}
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*info = SkImageInfo::MakeN32(TestImageGenerator::Width(),
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TestImageGenerator::Height(),
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kOpaque_SkAlphaType);
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return true;
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}
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virtual Result onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
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const Options&,
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SkPMColor ctable[], int* ctableCount) SK_OVERRIDE {
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REPORTER_ASSERT(fReporter, pixels != NULL);
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REPORTER_ASSERT(fReporter, rowBytes >= info.minRowBytes());
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if (fType != kSucceedGetPixels_TestType) {
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return kUnimplemented;
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}
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if (info.colorType() != kN32_SkColorType) {
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return kInvalidConversion;
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}
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char* bytePtr = static_cast<char*>(pixels);
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for (int y = 0; y < info.height(); ++y) {
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sk_memset32(reinterpret_cast<SkColor*>(bytePtr),
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TestImageGenerator::Color(), info.width());
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bytePtr += rowBytes;
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}
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return kSuccess;
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}
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private:
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const TestType fType;
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skiatest::Reporter* const fReporter;
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};
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static void check_test_image_generator_bitmap(skiatest::Reporter* reporter,
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const SkBitmap& bm) {
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REPORTER_ASSERT(reporter, TestImageGenerator::Width() == bm.width());
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REPORTER_ASSERT(reporter, TestImageGenerator::Height() == bm.height());
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SkAutoLockPixels autoLockPixels(bm);
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REPORTER_ASSERT(reporter, bm.getPixels());
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if (NULL == bm.getPixels()) {
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return;
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}
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int errors = 0;
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for (int y = 0; y < bm.height(); ++y) {
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for (int x = 0; x < bm.width(); ++x) {
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if (TestImageGenerator::Color() != *bm.getAddr32(x, y)) {
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++errors;
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}
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}
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}
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REPORTER_ASSERT(reporter, 0 == errors);
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}
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enum PixelRefType {
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kSkCaching_PixelRefType,
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kSkDiscardable_PixelRefType,
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kLast_PixelRefType = kSkDiscardable_PixelRefType
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};
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static void check_pixelref(TestImageGenerator::TestType type,
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skiatest::Reporter* reporter,
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PixelRefType pixelRefType,
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SkDiscardableMemory::Factory* factory) {
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SkASSERT((pixelRefType >= 0) && (pixelRefType <= kLast_PixelRefType));
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SkAutoTDelete<SkImageGenerator> gen(SkNEW_ARGS(TestImageGenerator,
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(type, reporter)));
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REPORTER_ASSERT(reporter, gen.get() != NULL);
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SkBitmap lazy;
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bool success;
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if (kSkCaching_PixelRefType == pixelRefType) {
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// Ignore factory; use global cache.
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success = SkCachingPixelRef::Install(gen.detach(), &lazy);
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} else {
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success = SkInstallDiscardablePixelRef(gen.detach(), &lazy, factory);
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}
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REPORTER_ASSERT(reporter, success
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== (TestImageGenerator::kFailGetInfo_TestType != type));
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if (TestImageGenerator::kSucceedGetPixels_TestType == type) {
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check_test_image_generator_bitmap(reporter, lazy);
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} else if (TestImageGenerator::kFailGetPixels_TestType == type) {
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SkAutoLockPixels autoLockPixels(lazy);
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REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
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}
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}
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// new/lock/delete is an odd pattern for a pixelref, but it needs to not assert
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static void test_newlockdelete(skiatest::Reporter* reporter) {
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SkBitmap bm;
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SkImageGenerator* ig = new TestImageGenerator(
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TestImageGenerator::kSucceedGetPixels_TestType, reporter);
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SkInstallDiscardablePixelRef(ig, &bm);
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bm.pixelRef()->lockPixels();
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}
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/**
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* This tests the basic functionality of SkDiscardablePixelRef with a
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* basic SkImageGenerator implementation and several
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* SkDiscardableMemory::Factory choices.
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*/
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DEF_TEST(DiscardableAndCachingPixelRef, reporter) {
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test_newlockdelete(reporter);
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check_pixelref(TestImageGenerator::kFailGetInfo_TestType,
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reporter, kSkCaching_PixelRefType, NULL);
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check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
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reporter, kSkCaching_PixelRefType, NULL);
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check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
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reporter, kSkCaching_PixelRefType, NULL);
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check_pixelref(TestImageGenerator::kFailGetInfo_TestType,
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reporter, kSkDiscardable_PixelRefType, NULL);
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check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
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reporter, kSkDiscardable_PixelRefType, NULL);
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check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
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reporter, kSkDiscardable_PixelRefType, NULL);
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SkAutoTUnref<SkDiscardableMemoryPool> pool(
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SkDiscardableMemoryPool::Create(1, NULL));
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REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
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check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
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reporter, kSkDiscardable_PixelRefType, pool);
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REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
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check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
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reporter, kSkDiscardable_PixelRefType, pool);
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REPORTER_ASSERT(reporter, 0 == pool->getRAMUsed());
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SkDiscardableMemoryPool* globalPool = SkGetGlobalDiscardableMemoryPool();
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// Only acts differently from NULL on a platform that has a
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// default discardable memory implementation that differs from the
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// global DM pool.
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check_pixelref(TestImageGenerator::kFailGetPixels_TestType,
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reporter, kSkDiscardable_PixelRefType, globalPool);
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check_pixelref(TestImageGenerator::kSucceedGetPixels_TestType,
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reporter, kSkDiscardable_PixelRefType, globalPool);
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}
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////////////////////////////////////////////////////////////////////////////////
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DEF_TEST(Image_NewFromGenerator, r) {
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TestImageGenerator::TestType testTypes[] = {
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TestImageGenerator::kFailGetInfo_TestType,
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TestImageGenerator::kFailGetPixels_TestType,
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TestImageGenerator::kSucceedGetPixels_TestType,
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(testTypes); ++i) {
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TestImageGenerator::TestType test = testTypes[i];
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SkImageGenerator* gen = SkNEW_ARGS(TestImageGenerator, (test, r));
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SkAutoTUnref<SkImage> image(SkImage::NewFromGenerator(gen));
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if (TestImageGenerator::kFailGetInfo_TestType == test) {
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REPORTER_ASSERT(r, NULL == image.get());
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continue;
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}
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if (NULL == image.get()) {
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ERRORF(r, "SkImage::NewFromGenerator unexpecedly failed ["
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SK_SIZE_T_SPECIFIER "]", i);
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continue;
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}
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REPORTER_ASSERT(r, TestImageGenerator::Width() == image->width());
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REPORTER_ASSERT(r, TestImageGenerator::Height() == image->height());
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SkBitmap bitmap;
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bitmap.allocN32Pixels(TestImageGenerator::Width(), TestImageGenerator::Height());
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SkCanvas canvas(bitmap);
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const SkColor kDefaultColor = 0xffabcdef;
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canvas.clear(kDefaultColor);
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canvas.drawImage(image, 0, 0, NULL);
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if (TestImageGenerator::kSucceedGetPixels_TestType == test) {
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REPORTER_ASSERT(
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r, TestImageGenerator::Color() == *bitmap.getAddr32(0, 0));
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} else {
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REPORTER_ASSERT(r, kDefaultColor == bitmap.getColor(0,0));
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}
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}
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}
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