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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkBitmap.h"
#include "SkData.h"
#include "SkImageGenerator.h"
#include "SkForceLinking.h"
#include "SkImageDecoder.h"
#include "SkOSFile.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "Test.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
/**
* First, make sure that writing an 8-bit RGBA KTX file and then
* reading it produces the same bitmap.
*/
DEF_TEST(KtxReadWrite, reporter) {
// Random number generator with explicit seed for reproducibility
SkRandom rand(0x1005cbad);
SkBitmap bm8888;
bm8888.allocN32Pixels(128, 128);
uint8_t *pixels = reinterpret_cast<uint8_t*>(bm8888.getPixels());
REPORTER_ASSERT(reporter, pixels);
if (nullptr == pixels) {
return;
}
uint8_t *row = pixels;
for (int y = 0; y < bm8888.height(); ++y) {
for (int x = 0; x < bm8888.width(); ++x) {
uint8_t a = rand.nextRangeU(0, 255);
uint8_t r = rand.nextRangeU(0, 255);
uint8_t g = rand.nextRangeU(0, 255);
uint8_t b = rand.nextRangeU(0, 255);
SkPMColor &pixel = *(reinterpret_cast<SkPMColor*>(row + x*sizeof(SkPMColor)));
pixel = SkPreMultiplyARGB(a, r, g, b);
}
row += bm8888.rowBytes();
}
REPORTER_ASSERT(reporter, !(bm8888.empty()));
SkAutoDataUnref encodedData(SkImageEncoder::EncodeData(bm8888, SkImageEncoder::kKTX_Type, 0));
if (nullptr == encodedData.get()) {
ERRORF(reporter, "failed to encode the bitmap to KTX");
return;
}
SkAutoTDelete<SkMemoryStream> stream(new SkMemoryStream(encodedData));
REPORTER_ASSERT(reporter, stream);
SkBitmap decodedBitmap;
bool imageDecodeSuccess = SkImageDecoder::DecodeStream(stream, &decodedBitmap);
if (!imageDecodeSuccess) {
ERRORF(reporter, "failed to decode the KTX stream");
return;
}
REPORTER_ASSERT(reporter, decodedBitmap.colorType() == bm8888.colorType());
REPORTER_ASSERT(reporter, decodedBitmap.alphaType() == bm8888.alphaType());
REPORTER_ASSERT(reporter, decodedBitmap.width() == bm8888.width());
REPORTER_ASSERT(reporter, decodedBitmap.height() == bm8888.height());
REPORTER_ASSERT(reporter, !(decodedBitmap.empty()));
uint8_t *decodedPixels = reinterpret_cast<uint8_t*>(decodedBitmap.getPixels());
REPORTER_ASSERT(reporter, decodedPixels);
REPORTER_ASSERT(reporter, decodedBitmap.getSize() == bm8888.getSize());
if (nullptr == decodedPixels) {
return;
}
REPORTER_ASSERT(reporter, memcmp(decodedPixels, pixels, decodedBitmap.getSize()) == 0);
}
/**
* Next test is to see whether or not reading an unpremultiplied KTX file accurately
* creates a premultiplied buffer...
*/
DEF_TEST(KtxReadUnpremul, reporter) {
static const uint8_t kHalfWhiteKTX[] = {
0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, // First twelve bytes is magic
0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A, // KTX identifier string
0x01, 0x02, 0x03, 0x04, // Then magic endian specifier
0x01, 0x14, 0x00, 0x00, // uint32_t fGLType;
0x01, 0x00, 0x00, 0x00, // uint32_t fGLTypeSize;
0x08, 0x19, 0x00, 0x00, // uint32_t fGLFormat;
0x58, 0x80, 0x00, 0x00, // uint32_t fGLInternalFormat;
0x08, 0x19, 0x00, 0x00, // uint32_t fGLBaseInternalFormat;
0x02, 0x00, 0x00, 0x00, // uint32_t fPixelWidth;
0x02, 0x00, 0x00, 0x00, // uint32_t fPixelHeight;
0x00, 0x00, 0x00, 0x00, // uint32_t fPixelDepth;
0x00, 0x00, 0x00, 0x00, // uint32_t fNumberOfArrayElements;
0x01, 0x00, 0x00, 0x00, // uint32_t fNumberOfFaces;
0x01, 0x00, 0x00, 0x00, // uint32_t fNumberOfMipmapLevels;
0x00, 0x00, 0x00, 0x00, // uint32_t fBytesOfKeyValueData;
0x10, 0x00, 0x00, 0x00, // image size: 2x2 image of RGBA = 4 * 4 = 16 bytes
0xFF, 0xFF, 0xFF, 0x80, // Pixel 1
0xFF, 0xFF, 0xFF, 0x80, // Pixel 2
0xFF, 0xFF, 0xFF, 0x80, // Pixel 3
0xFF, 0xFF, 0xFF, 0x80};// Pixel 4
SkAutoTDelete<SkMemoryStream> stream(new SkMemoryStream(kHalfWhiteKTX, sizeof(kHalfWhiteKTX)));
REPORTER_ASSERT(reporter, stream);
SkBitmap decodedBitmap;
bool imageDecodeSuccess = SkImageDecoder::DecodeStream(stream, &decodedBitmap);
if (!imageDecodeSuccess) {
ERRORF(reporter, "failed to decode the KTX stream");
return;
}
REPORTER_ASSERT(reporter, decodedBitmap.colorType() == kN32_SkColorType);
REPORTER_ASSERT(reporter, decodedBitmap.alphaType() == kPremul_SkAlphaType);
REPORTER_ASSERT(reporter, decodedBitmap.width() == 2);
REPORTER_ASSERT(reporter, decodedBitmap.height() == 2);
REPORTER_ASSERT(reporter, !(decodedBitmap.empty()));
uint8_t *decodedPixels = reinterpret_cast<uint8_t*>(decodedBitmap.getPixels());
REPORTER_ASSERT(reporter, decodedPixels);
uint8_t *row = decodedPixels;
for (int j = 0; j < decodedBitmap.height(); ++j) {
for (int i = 0; i < decodedBitmap.width(); ++i) {
SkPMColor pixel = *(reinterpret_cast<SkPMColor*>(row + i*sizeof(SkPMColor)));
REPORTER_ASSERT(reporter, SkPreMultiplyARGB(0x80, 0xFF, 0xFF, 0xFF) == pixel);
}
row += decodedBitmap.rowBytes();
}
}
/**
* Finally, make sure that if we get ETC1 data from a PKM file that we can then
* accurately write it out into a KTX file (i.e. transferring the ETC1 data from
* the PKM to the KTX should produce an identical KTX to the one we have on file)
*/
DEF_TEST(KtxReexportPKM, reporter) {
SkString pkmFilename = GetResourcePath("mandrill_128.pkm");
// Load PKM file into a bitmap
SkBitmap etcBitmap;
SkAutoTUnref<SkData> fileData(SkData::NewFromFileName(pkmFilename.c_str()));
if (nullptr == fileData) {
SkDebugf("KtxReexportPKM: can't load test file %s\n", pkmFilename.c_str());
return;
}
bool installDiscardablePixelRefSuccess =
SkDEPRECATED_InstallDiscardablePixelRef(fileData, &etcBitmap);
if (!installDiscardablePixelRefSuccess) {
ERRORF(reporter, "failed to create discardable pixelRef from KTX file");
return;
}
// Write the bitmap out to a KTX file.
SkData *ktxDataPtr = SkImageEncoder::EncodeData(etcBitmap, SkImageEncoder::kKTX_Type, 0);
SkAutoDataUnref newKtxData(ktxDataPtr);
REPORTER_ASSERT(reporter, ktxDataPtr);
// See is this data is identical to data in existing ktx file.
SkString ktxFilename = GetResourcePath("mandrill_128.ktx");
SkAutoDataUnref oldKtxData(SkData::NewFromFileName(ktxFilename.c_str()));
REPORTER_ASSERT(reporter, oldKtxData->equals(newKtxData));
}
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