ad04eb49f5
- Add SkDiscardablePixelRef class that uses SkDiscardableMemory and
a SkImageGenerator.
- Add SkDecodingImageGenerator class as an example of a
SkImageGenerator.
- Add DecodingImageGenerator unit test.
- Add SkBasicDiscardableMemory implmentation for unit tests only.
R=reed@google.com, scroggo@google.com
Review URL: https://codereview.chromium.org/74793011
git-svn-id: http://skia.googlecode.com/svn/trunk@12341 2bbb7eff-a529-9590-31e7-b0007b416f81
280 lines
9.5 KiB
C++
280 lines
9.5 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 "SkCanvas.h"
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#include "SkData.h"
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#include "SkDecodingImageGenerator.h"
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#include "SkForceLinking.h"
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#include "SkImageDecoder.h"
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#include "SkImagePriv.h"
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#include "SkLazyCachingPixelRef.h"
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#include "SkLazyPixelRef.h"
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#include "SkScaledImageCache.h"
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#include "SkStream.h"
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#include "Test.h"
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#include "TestClassDef.h"
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__SK_FORCE_IMAGE_DECODER_LINKING;
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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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static const int W = 50, H = 50;
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static const SkBitmap::Config config = SkBitmap::kARGB_8888_Config;
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bm->setConfig(config, W, H);
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bm->allocPixels();
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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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* A simplified version of SkBitmapFactory
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*/
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static bool simple_bitmap_factory(SkBitmapFactory::DecodeProc proc,
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SkData* data,
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SkBitmap* dst) {
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SkImageInfo info;
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if (!proc(data->data(), data->size(), &info, NULL)) {
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return false;
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}
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dst->setConfig(SkImageInfoToBitmapConfig(info), info.fWidth,
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info.fHeight, 0, info.fAlphaType);
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SkAutoTUnref<SkLazyPixelRef> ref(SkNEW_ARGS(SkLazyPixelRef,
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(data, proc, NULL)));
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dst->setPixelRef(ref);
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return true;
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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, NULL != b1.getPixels());
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REPORTER_ASSERT(reporter, NULL != 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 void(*CompareEncodedToOriginal)(skiatest::Reporter* reporter,
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SkData* encoded,
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const SkBitmap& original,
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bool pixelPerfect);
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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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CompareEncodedToOriginal comp) {
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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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bool comparePixels = (SkImageEncoder::kPNG_Type == type);
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comp(reporter, encoded, original, comparePixels);
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}
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}
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}
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/**
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* This checks to see that a SkLazyPixelRef works as advertised.
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*/
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static void compare_with_skLazyPixelRef(skiatest::Reporter* reporter,
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SkData* encoded,
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const SkBitmap& original,
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bool comparePixels) {
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SkBitmap lazy;
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static const SkBitmapFactory::DecodeProc decoder =
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&(SkImageDecoder::DecodeMemoryToTarget);
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bool success = simple_bitmap_factory(decoder, encoded, &lazy);
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REPORTER_ASSERT(reporter, success);
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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, NULL != lazy.getPixels());
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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, NULL != lazy.getPixels());
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}
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compare_bitmaps(reporter, original, lazy, comparePixels);
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}
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DEF_TEST(LazyPixelRef, reporter) {
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test_three_encodings(reporter, compare_with_skLazyPixelRef);
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}
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/**
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* This checks to see that a SkLazyCachedPixelRef works as advertised.
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*/
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static void compare_with_skLazyCachedPixelRef(skiatest::Reporter* reporter,
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SkData* encoded,
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const SkBitmap& original,
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bool comparePixels) {
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SkBitmap lazy;
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static const SkBitmapFactory::DecodeProc decoder =
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&(SkImageDecoder::DecodeMemoryToTarget);
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bool success = SkLazyCachingPixelRef::Install(decoder, encoded, &lazy);
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REPORTER_ASSERT(reporter, success);
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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, NULL != lazy.getPixels());
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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, NULL != lazy.getPixels());
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}
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compare_bitmaps(reporter, original, lazy, comparePixels);
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}
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DEF_TEST(LazyCachedPixelRef, reporter) {
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test_three_encodings(reporter, compare_with_skLazyCachedPixelRef);
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}
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class TestPixelRef : public SkCachingPixelRef {
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public:
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TestPixelRef(int x) : fX(x) { }
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virtual ~TestPixelRef() { }
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static bool Install(SkBitmap* destination, int x) {
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SkAutoTUnref<TestPixelRef> ref(SkNEW_ARGS(TestPixelRef, (x)));
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return ref->configure(destination) && destination->setPixelRef(ref);
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}
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SK_DECLARE_UNFLATTENABLE_OBJECT()
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protected:
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virtual bool onDecodeInfo(SkImageInfo* info) SK_OVERRIDE {
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if (fX == 0) {
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return false;
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}
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SkASSERT(info);
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info->fWidth = 10;
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info->fHeight = 10;
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info->fColorType = kRGBA_8888_SkColorType;
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info->fAlphaType = kOpaque_SkAlphaType;
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return true;
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}
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virtual bool onDecodePixels(const SkImageInfo& info,
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void* pixels,
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size_t rowBytes) SK_OVERRIDE {
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return false;
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}
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private:
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int fX; // controls where the failure happens
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typedef SkCachingPixelRef INHERITED;
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};
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DEF_TEST(CachingPixelRef, reporter) {
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SkBitmap lazy;
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// test the error handling
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REPORTER_ASSERT(reporter, !TestPixelRef::Install(&lazy, 0));
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// onDecodeInfo should succeed, allowing installation
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REPORTER_ASSERT(reporter, TestPixelRef::Install(&lazy, 1));
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SkAutoLockPixels autoLockPixels(lazy); // now pixels are good.
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// onDecodePixels should fail, so getting pixels will fail.
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REPORTER_ASSERT(reporter, NULL == lazy.getPixels());
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}
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static void compare_with_SkDecodingImageGenerator(skiatest::Reporter* reporter,
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SkData* encoded,
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const SkBitmap& original,
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bool comparePixels) {
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SkBitmap lazy;
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bool success = SkDecodingImageGenerator::Install(encoded, &lazy);
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REPORTER_ASSERT(reporter, success);
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if (!success) {
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return;
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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, NULL != lazy.getPixels());
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if (NULL == lazy.getPixels()) {
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return;
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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, NULL != lazy.getPixels());
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}
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compare_bitmaps(reporter, original, lazy, comparePixels);
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}
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DEF_TEST(DecodingImageGenerator, reporter) {
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test_three_encodings(reporter, compare_with_SkDecodingImageGenerator);
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}
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