e5a8e66668
R=scroggo@google.com, reed@google.com Author: halcanary@google.com Review URL: https://codereview.chromium.org/293283002 git-svn-id: http://skia.googlecode.com/svn/trunk@14882 2bbb7eff-a529-9590-31e7-b0007b416f81
730 lines
28 KiB
C++
730 lines
28 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 "SkColor.h"
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#include "SkColorPriv.h"
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#include "SkData.h"
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#include "SkDecodingImageGenerator.h"
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#include "SkDiscardableMemoryPool.h"
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#include "SkForceLinking.h"
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#include "SkGradientShader.h"
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#include "SkImageDecoder.h"
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#include "SkImageEncoder.h"
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#include "SkImageGenerator.h"
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#include "SkImagePriv.h"
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#include "SkOSFile.h"
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#include "SkPoint.h"
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#include "SkShader.h"
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#include "SkStream.h"
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#include "SkString.h"
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#include "Test.h"
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__SK_FORCE_IMAGE_DECODER_LINKING;
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/**
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* Interprets c as an unpremultiplied color, and returns the
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* premultiplied equivalent.
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*/
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static SkPMColor premultiply_unpmcolor(SkPMColor c) {
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U8CPU a = SkGetPackedA32(c);
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U8CPU r = SkGetPackedR32(c);
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U8CPU g = SkGetPackedG32(c);
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U8CPU b = SkGetPackedB32(c);
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return SkPreMultiplyARGB(a, r, g, b);
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}
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/**
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* Return true if this stream format should be skipped, due
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* to do being an opaque format or not a valid format.
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*/
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static bool skip_image_format(SkImageDecoder::Format format) {
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switch (format) {
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case SkImageDecoder::kPNG_Format:
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case SkImageDecoder::kWEBP_Format:
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return false;
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// Skip unknown since it will not be decoded anyway.
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case SkImageDecoder::kUnknown_Format:
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// Technically ICO and BMP supports alpha channels, but our image
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// decoders do not, so skip them as well.
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case SkImageDecoder::kICO_Format:
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case SkImageDecoder::kBMP_Format:
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// The rest of these are opaque.
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case SkImageDecoder::kPKM_Format:
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case SkImageDecoder::kWBMP_Format:
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case SkImageDecoder::kGIF_Format:
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case SkImageDecoder::kJPEG_Format:
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return true;
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}
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SkASSERT(false);
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return true;
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}
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/**
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* Test decoding an image in premultiplied mode and unpremultiplied mode and compare
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* them.
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*/
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static void compare_unpremul(skiatest::Reporter* reporter, const SkString& filename) {
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// Decode a resource:
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SkBitmap bm8888;
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SkBitmap bm8888Unpremul;
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SkFILEStream stream(filename.c_str());
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SkImageDecoder::Format format = SkImageDecoder::GetStreamFormat(&stream);
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if (skip_image_format(format)) {
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return;
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}
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SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
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if (NULL == decoder.get()) {
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SkDebugf("couldn't decode %s\n", filename.c_str());
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return;
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}
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bool success = decoder->decode(&stream, &bm8888, SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode);
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if (!success) {
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return;
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}
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success = stream.rewind();
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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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decoder->setRequireUnpremultipliedColors(true);
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success = decoder->decode(&stream, &bm8888Unpremul, SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode);
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if (!success) {
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return;
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}
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bool dimensionsMatch = bm8888.width() == bm8888Unpremul.width()
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&& bm8888.height() == bm8888Unpremul.height();
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REPORTER_ASSERT(reporter, dimensionsMatch);
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if (!dimensionsMatch) {
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return;
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}
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// Only do the comparison if the two bitmaps are both 8888.
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if (bm8888.config() != SkBitmap::kARGB_8888_Config
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|| bm8888Unpremul.config() != SkBitmap::kARGB_8888_Config) {
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return;
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}
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// Now compare the two bitmaps.
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for (int i = 0; i < bm8888.width(); ++i) {
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for (int j = 0; j < bm8888.height(); ++j) {
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// "c0" is the color of the premultiplied bitmap at (i, j).
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const SkPMColor c0 = *bm8888.getAddr32(i, j);
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// "c1" is the result of premultiplying the color of the unpremultiplied
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// bitmap at (i, j).
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const SkPMColor c1 = premultiply_unpmcolor(*bm8888Unpremul.getAddr32(i, j));
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// Compute the difference for each component.
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int da = SkAbs32(SkGetPackedA32(c0) - SkGetPackedA32(c1));
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int dr = SkAbs32(SkGetPackedR32(c0) - SkGetPackedR32(c1));
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int dg = SkAbs32(SkGetPackedG32(c0) - SkGetPackedG32(c1));
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int db = SkAbs32(SkGetPackedB32(c0) - SkGetPackedB32(c1));
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// Alpha component must be exactly the same.
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REPORTER_ASSERT(reporter, 0 == da);
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// Color components may not match exactly due to rounding error.
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REPORTER_ASSERT(reporter, dr <= 1);
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REPORTER_ASSERT(reporter, dg <= 1);
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REPORTER_ASSERT(reporter, db <= 1);
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}
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}
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}
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static void test_unpremul(skiatest::Reporter* reporter) {
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// This test cannot run if there is no resource path.
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SkString resourcePath = skiatest::Test::GetResourcePath();
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if (resourcePath.isEmpty()) {
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SkDebugf("Could not run unpremul test because resourcePath not specified.");
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return;
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}
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SkOSFile::Iter iter(resourcePath.c_str());
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SkString basename;
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if (iter.next(&basename)) {
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do {
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SkString filename = SkOSPath::SkPathJoin(resourcePath.c_str(), basename.c_str());
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// SkDebugf("about to decode \"%s\"\n", filename.c_str());
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compare_unpremul(reporter, filename);
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} while (iter.next(&basename));
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} else {
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SkDebugf("Failed to find any files :(\n");
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}
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}
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#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
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// Test that the alpha type is what we expect.
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static void test_alphaType(skiatest::Reporter* reporter, const SkString& filename,
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bool requireUnpremul) {
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SkBitmap bm;
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SkFILEStream stream(filename.c_str());
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SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
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if (NULL == decoder.get()) {
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return;
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}
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decoder->setRequireUnpremultipliedColors(requireUnpremul);
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// Decode just the bounds. This should always succeed.
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bool success = decoder->decode(&stream, &bm, SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodeBounds_Mode);
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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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// Keep track of the alpha type for testing later. If the full decode
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// succeeds, the alpha type should be the same, unless the full decode
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// determined that the alpha type should actually be opaque, which may
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// not be known when only decoding the bounds.
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const SkAlphaType boundsAlphaType = bm.alphaType();
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// rewind should always succeed on SkFILEStream.
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success = stream.rewind();
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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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success = decoder->decode(&stream, &bm, SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode);
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if (!success) {
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// When the decoder is set to require unpremul, if it does not support
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// unpremul it will fail. This is the only reason the decode should
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// fail (since we know the files we are using to test can be decoded).
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REPORTER_ASSERT(reporter, requireUnpremul);
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return;
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}
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// The bounds decode should return with either the requested
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// premul/unpremul or opaque, if that value could be determined when only
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// decoding the bounds.
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if (requireUnpremul) {
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REPORTER_ASSERT(reporter, kUnpremul_SkAlphaType == boundsAlphaType
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|| kOpaque_SkAlphaType == boundsAlphaType);
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} else {
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REPORTER_ASSERT(reporter, kPremul_SkAlphaType == boundsAlphaType
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|| kOpaque_SkAlphaType == boundsAlphaType);
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}
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// When decoding the full image, the alpha type should match the one
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// returned by the bounds decode, unless the full decode determined that
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// the alpha type is actually opaque.
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REPORTER_ASSERT(reporter, bm.alphaType() == boundsAlphaType
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|| bm.alphaType() == kOpaque_SkAlphaType);
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}
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DEF_TEST(ImageDecoding_alphaType, reporter) {
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SkString resourcePath = skiatest::Test::GetResourcePath();
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if (resourcePath.isEmpty()) {
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SkDebugf("Could not run alphaType test because resourcePath not specified.");
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return;
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}
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SkOSFile::Iter iter(resourcePath.c_str());
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SkString basename;
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if (iter.next(&basename)) {
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do {
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SkString filename = SkOSPath::SkPathJoin(resourcePath.c_str(), basename.c_str());
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for (int truth = 0; truth <= 1; ++truth) {
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test_alphaType(reporter, filename, SkToBool(truth));
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}
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} while (iter.next(&basename));
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} else {
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SkDebugf("Failed to find any files :(\n");
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}
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}
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// Using known images, test that decoding into unpremul and premul behave as expected.
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DEF_TEST(ImageDecoding_unpremul, reporter) {
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SkString resourcePath = skiatest::Test::GetResourcePath();
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if (resourcePath.isEmpty()) {
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SkDebugf("Could not run unpremul test because resourcePath not specified.");
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return;
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}
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const char* root = "half-transparent-white-pixel";
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const char* suffixes[] = { ".png", ".webp" };
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for (size_t i = 0; i < SK_ARRAY_COUNT(suffixes); ++i) {
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SkString basename = SkStringPrintf("%s%s", root, suffixes[i]);
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SkString fullName = SkOSPath::SkPathJoin(resourcePath.c_str(), basename.c_str());
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SkBitmap bm;
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SkFILEStream stream(fullName.c_str());
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if (!stream.isValid()) {
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SkDebugf("file %s missing from resource directoy %s\n",
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basename.c_str(), resourcePath.c_str());
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continue;
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}
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// This should never fail since we know the images we're decoding.
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SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
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REPORTER_ASSERT(reporter, NULL != decoder.get());
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if (NULL == decoder.get()) {
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continue;
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}
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// Test unpremultiplied. We know what color this should result in.
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decoder->setRequireUnpremultipliedColors(true);
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bool success = decoder->decode(&stream, &bm, SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode);
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REPORTER_ASSERT(reporter, success);
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if (!success) {
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continue;
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}
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REPORTER_ASSERT(reporter, bm.width() == 1 && bm.height() == 1);
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{
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SkAutoLockPixels alp(bm);
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REPORTER_ASSERT(reporter, bm.getAddr32(0, 0)[0] == 0x7fffffff);
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}
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success = stream.rewind();
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REPORTER_ASSERT(reporter, success);
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if (!success) {
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continue;
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}
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// Test premultiplied. Once again, we know which color this should
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// result in.
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decoder->setRequireUnpremultipliedColors(false);
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success = decoder->decode(&stream, &bm, SkBitmap::kARGB_8888_Config,
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SkImageDecoder::kDecodePixels_Mode);
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REPORTER_ASSERT(reporter, success);
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if (!success) {
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continue;
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}
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REPORTER_ASSERT(reporter, bm.width() == 1 && bm.height() == 1);
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{
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SkAutoLockPixels alp(bm);
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REPORTER_ASSERT(reporter, bm.getAddr32(0, 0)[0] == 0x7f7f7f7f);
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}
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}
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}
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#endif // SK_BUILD_FOR_UNIX/ANDROID skbug.com/2388
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#ifdef SK_DEBUG
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// Create a stream containing a bitmap encoded to Type type.
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static SkMemoryStream* create_image_stream(SkImageEncoder::Type type) {
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SkBitmap bm;
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const int size = 50;
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bm.allocN32Pixels(size, size);
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SkCanvas canvas(bm);
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SkPoint points[2] = {
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{ SkIntToScalar(0), SkIntToScalar(0) },
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{ SkIntToScalar(size), SkIntToScalar(size) }
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};
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SkColor colors[2] = { SK_ColorWHITE, SK_ColorBLUE };
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SkShader* shader = SkGradientShader::CreateLinear(points, colors, NULL,
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SK_ARRAY_COUNT(colors),
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SkShader::kClamp_TileMode);
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SkPaint paint;
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paint.setShader(shader)->unref();
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canvas.drawPaint(paint);
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// Now encode it to a stream.
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SkAutoTUnref<SkData> data(SkImageEncoder::EncodeData(bm, type, 100));
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if (NULL == data.get()) {
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return NULL;
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}
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return SkNEW_ARGS(SkMemoryStream, (data.get()));
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}
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// For every format that supports tile based decoding, ensure that
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// calling decodeSubset will not fail if the caller has unreffed the
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// stream provided in buildTileIndex.
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// Only runs in debug mode since we are testing for a crash.
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static void test_stream_life() {
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const SkImageEncoder::Type gTypes[] = {
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#ifdef SK_BUILD_FOR_ANDROID
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SkImageEncoder::kJPEG_Type,
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SkImageEncoder::kPNG_Type,
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#endif
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SkImageEncoder::kWEBP_Type,
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gTypes); ++i) {
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// SkDebugf("encoding to %i\n", i);
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SkAutoTUnref<SkMemoryStream> stream(create_image_stream(gTypes[i]));
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if (NULL == stream.get()) {
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SkDebugf("no stream\n");
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continue;
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}
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SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
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if (NULL == decoder.get()) {
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SkDebugf("no decoder\n");
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continue;
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}
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int width, height;
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if (!decoder->buildTileIndex(stream.get(), &width, &height)) {
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SkDebugf("could not build a tile index\n");
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continue;
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}
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// Now unref the stream to make sure it survives
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stream.reset(NULL);
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SkBitmap bm;
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decoder->decodeSubset(&bm, SkIRect::MakeWH(width, height),
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SkBitmap::kARGB_8888_Config);
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}
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}
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// Test inside SkScaledBitmapSampler.cpp
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extern void test_row_proc_choice();
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#endif // SK_DEBUG
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DEF_TEST(ImageDecoding, reporter) {
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test_unpremul(reporter);
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#ifdef SK_DEBUG
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test_stream_life();
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test_row_proc_choice();
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#endif
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}
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// expected output for 8x8 bitmap
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static const int kExpectedWidth = 8;
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static const int kExpectedHeight = 8;
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static const SkColor kExpectedPixels[] = {
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0xffbba570, 0xff395f5d, 0xffe25c39, 0xff197666,
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0xff3cba27, 0xffdefcb0, 0xffc13874, 0xfffa0093,
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0xffbda60e, 0xffc01db6, 0xff2bd688, 0xff9362d4,
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0xffc641b2, 0xffa5cede, 0xff606eba, 0xff8f4bf3,
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0xff3bf742, 0xff8f02a8, 0xff5509df, 0xffc7027e,
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0xff24aa8a, 0xff886c96, 0xff625481, 0xff403689,
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0xffc52152, 0xff78ccd6, 0xffdcb4ab, 0xff09d27d,
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0xffca00f3, 0xff605d47, 0xff446fb2, 0xff576e46,
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0xff273df9, 0xffb41a83, 0xfff812c3, 0xffccab67,
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0xff034218, 0xff7db9a7, 0xff821048, 0xfffe4ab4,
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0xff6fac98, 0xff941d27, 0xff5fe411, 0xfffbb283,
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0xffd86e99, 0xff169162, 0xff71128c, 0xff39cab4,
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0xffa7fe63, 0xff4c956b, 0xffbc22e0, 0xffb272e4,
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0xff129f4a, 0xffe34513, 0xff3d3742, 0xffbd190a,
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0xffb07222, 0xff2e23f8, 0xfff089d9, 0xffb35738,
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0xffa86022, 0xff3340fe, 0xff95fe71, 0xff6a71df
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};
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SK_COMPILE_ASSERT((kExpectedWidth * kExpectedHeight)
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== SK_ARRAY_COUNT(kExpectedPixels), array_size_mismatch);
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DEF_TEST(WebP, reporter) {
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const unsigned char encodedWebP[] = {
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0x52, 0x49, 0x46, 0x46, 0x2c, 0x01, 0x00, 0x00, 0x57, 0x45, 0x42, 0x50,
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0x56, 0x50, 0x38, 0x4c, 0x20, 0x01, 0x00, 0x00, 0x2f, 0x07, 0xc0, 0x01,
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0x00, 0xff, 0x01, 0x45, 0x03, 0x00, 0xe2, 0xd5, 0xae, 0x60, 0x2b, 0xad,
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0xd9, 0x68, 0x76, 0xb6, 0x8d, 0x6a, 0x1d, 0xc0, 0xe6, 0x19, 0xd6, 0x16,
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0xb7, 0xb4, 0xef, 0xcf, 0xc3, 0x15, 0x6c, 0xb3, 0xbd, 0x77, 0x0d, 0x85,
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0x6d, 0x1b, 0xa9, 0xb1, 0x2b, 0xdc, 0x3d, 0x83, 0xdb, 0x00, 0x00, 0xc8,
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0x26, 0xe5, 0x01, 0x99, 0x8a, 0xd5, 0xdd, 0xfc, 0x82, 0xcd, 0xcd, 0x9a,
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0x8c, 0x13, 0xcc, 0x1b, 0xba, 0xf5, 0x05, 0xdb, 0xee, 0x6a, 0xdb, 0x38,
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0x60, 0xfe, 0x43, 0x2c, 0xd4, 0x6a, 0x99, 0x4d, 0xc6, 0xc0, 0xd3, 0x28,
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0x1b, 0xc1, 0xb1, 0x17, 0x4e, 0x43, 0x0e, 0x3d, 0x27, 0xe9, 0xe4, 0x84,
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0x4f, 0x24, 0x62, 0x69, 0x85, 0x43, 0x8d, 0xc2, 0x04, 0x00, 0x07, 0x59,
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0x60, 0xfd, 0x8b, 0x4d, 0x60, 0x32, 0x72, 0xcf, 0x88, 0x0c, 0x2f, 0x2f,
|
|
0xad, 0x62, 0xbd, 0x27, 0x09, 0x16, 0x70, 0x78, 0x6c, 0xd9, 0x82, 0xef,
|
|
0x1a, 0xa2, 0xcc, 0xf0, 0xf1, 0x6f, 0xd8, 0x78, 0x2e, 0x39, 0xa1, 0xcf,
|
|
0x14, 0x4b, 0x89, 0xb4, 0x1b, 0x48, 0x15, 0x7c, 0x48, 0x6f, 0x8c, 0x20,
|
|
0xb7, 0x00, 0xcf, 0xfc, 0xdb, 0xd0, 0xe9, 0xe7, 0x42, 0x09, 0xa4, 0x03,
|
|
0x40, 0xac, 0xda, 0x40, 0x01, 0x00, 0x5f, 0xa1, 0x3d, 0x64, 0xe1, 0xf4,
|
|
0x03, 0x45, 0x29, 0xe0, 0xe2, 0x4a, 0xc3, 0xa2, 0xe8, 0xe0, 0x25, 0x12,
|
|
0x74, 0xc6, 0xe8, 0xfb, 0x93, 0x4f, 0x9f, 0x5e, 0xc0, 0xa6, 0x91, 0x1b,
|
|
0xa4, 0x24, 0x82, 0xc3, 0x61, 0x07, 0x4c, 0x49, 0x4f, 0x53, 0xae, 0x5f,
|
|
0x5d, 0x39, 0x36, 0xc0, 0x5b, 0x57, 0x54, 0x60, 0x10, 0x00, 0x00, 0xd1,
|
|
0x68, 0xb6, 0x6d, 0xdb, 0x36, 0x22, 0xfa, 0x1f, 0x35, 0x75, 0x22, 0xec,
|
|
0x31, 0xbc, 0x5d, 0x8f, 0x87, 0x53, 0xa2, 0x05, 0x8c, 0x2f, 0xcd, 0xa8,
|
|
0xa7, 0xf3, 0xa3, 0xbd, 0x83, 0x8b, 0x2a, 0xc8, 0x58, 0xf5, 0xac, 0x80,
|
|
0xe3, 0xfe, 0x66, 0xa4, 0x7c, 0x1b, 0x6c, 0xd1, 0xa9, 0xd8, 0x14, 0xd0,
|
|
0xc5, 0xb5, 0x39, 0x71, 0x97, 0x19, 0x19, 0x1b
|
|
};
|
|
SkAutoDataUnref encoded(SkData::NewWithCopy(encodedWebP,
|
|
sizeof(encodedWebP)));
|
|
SkBitmap bm;
|
|
|
|
bool success = SkInstallDiscardablePixelRef(
|
|
SkDecodingImageGenerator::Create(encoded,
|
|
SkDecodingImageGenerator::Options()), &bm, NULL);
|
|
|
|
REPORTER_ASSERT(reporter, success);
|
|
if (!success) {
|
|
return;
|
|
}
|
|
SkAutoLockPixels alp(bm);
|
|
|
|
bool rightSize = ((kExpectedWidth == bm.width())
|
|
&& (kExpectedHeight == bm.height()));
|
|
REPORTER_ASSERT(reporter, rightSize);
|
|
if (rightSize) {
|
|
bool error = false;
|
|
const SkColor* correctPixel = kExpectedPixels;
|
|
for (int y = 0; y < bm.height(); ++y) {
|
|
for (int x = 0; x < bm.width(); ++x) {
|
|
error |= (*correctPixel != bm.getColor(x, y));
|
|
++correctPixel;
|
|
}
|
|
}
|
|
REPORTER_ASSERT(reporter, !error);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// 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 = bitmap->colorType();
|
|
SkDecodingImageGenerator::Options opts(sampleSize, ditherImage, colorType);
|
|
if (SkInstallDiscardablePixelRef(
|
|
SkDecodingImageGenerator::Create(stream, opts), bitmap)) {
|
|
return bitmap->pixelRef();
|
|
}
|
|
return NULL;
|
|
}
|
|
/**
|
|
* A test for the SkDecodingImageGenerator::Create and
|
|
* SkInstallDiscardablePixelRef functions.
|
|
*/
|
|
DEF_TEST(ImprovedBitmapFactory, reporter) {
|
|
SkString resourcePath = skiatest::Test::GetResourcePath();
|
|
SkString path = SkOSPath::SkPathJoin(
|
|
resourcePath.c_str(), "randPixels.png");
|
|
SkAutoTUnref<SkStreamRewindable> stream(
|
|
SkStream::NewFromFile(path.c_str()));
|
|
if (sk_exists(path.c_str())) {
|
|
SkBitmap bm;
|
|
SkAssertResult(bm.setConfig(SkImageInfo::MakeN32Premul(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 the value is greater than floor(dividend/divisor)
|
|
// and less than SkNextPow2(ceil(dividend - divisor))
|
|
return (((divisor * value) > (dividend - divisor))
|
|
&& value <= SkNextPow2(((dividend - 1) / divisor) + 1));
|
|
}
|
|
#endif // SK_BUILD_FOR_ANDROID || SK_BUILD_FOR_UNIX
|
|
|
|
|
|
#if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
|
|
#define kBackwards_SkColorType kRGBA_8888_SkColorType
|
|
#elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
|
|
#define kBackwards_SkColorType kBGRA_8888_SkColorType
|
|
#else
|
|
#error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order"
|
|
#endif
|
|
|
|
static inline const char* SkColorType_to_string(SkColorType colorType) {
|
|
switch(colorType) {
|
|
case kAlpha_8_SkColorType: return "Alpha_8";
|
|
case kRGB_565_SkColorType: return "RGB_565";
|
|
case kARGB_4444_SkColorType: return "ARGB_4444";
|
|
case kN32_SkColorType: return "N32";
|
|
case kBackwards_SkColorType: return "Backwards";
|
|
case kIndex_8_SkColorType: return "Index_8";
|
|
default: return "ERROR";
|
|
}
|
|
}
|
|
|
|
static inline const char* options_colorType(
|
|
const SkDecodingImageGenerator::Options& opts) {
|
|
if (opts.fUseRequestedColorType) {
|
|
return SkColorType_to_string(opts.fRequestedColorType);
|
|
} else {
|
|
return "(none)";
|
|
}
|
|
}
|
|
|
|
static inline const char* yn(bool value) {
|
|
if (value) {
|
|
return "yes";
|
|
} else {
|
|
return "no";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
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;
|
|
}
|
|
|
|
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())
|
|
&& (!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());
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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",
|
|
#if !defined(SK_BUILD_FOR_WIN)
|
|
// TODO(halcanary): Find out why this fails sometimes.
|
|
"randPixels.gif",
|
|
#endif
|
|
};
|
|
|
|
SkString resourceDir = skiatest::Test::GetResourcePath();
|
|
if (!sk_exists(resourceDir.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.
|
|
kN32_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(resourceDir.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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|