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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/timer/elapsed_timer.h"
#include "platform/image-encoders/RGBAtoRGB.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "wtf/build_config.h"
namespace blink {
class RGBAtoRGBTest : public ::testing::Test {
public:
RGBAtoRGBTest() {}
};
static const size_t channelsRGBA = 4;
static const size_t channelsRGB = 3;
inline size_t calculateRGBAPixels(size_t inputBufferSize) {
size_t pixels = inputBufferSize / channelsRGBA;
return pixels;
}
inline size_t calculateRGBOutputSize(size_t inputBufferSize) {
size_t pixels = calculateRGBAPixels(inputBufferSize);
pixels *= channelsRGB;
return pixels;
}
TEST_F(RGBAtoRGBTest, testOpaqueCaseEven8pixels) {
unsigned char canvas[] = {255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0,
255, 255, 0, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255};
unsigned char expected[] = {255, 0, 0, 255, 0, 0, 255, 0, 0, 255, 0, 0, 0,
255, 0, 0, 255, 0, 0, 255, 0, 0, 255, 0};
#if OS(WIN)
// Windows release bot can't be reasoned with (compiler error C2131).
static const constexpr size_t pixels = sizeof(canvas) / channelsRGBA;
static const constexpr size_t rgbSize = pixels * channelsRGB;
#else
const size_t pixels = calculateRGBAPixels(sizeof(canvas));
const size_t rgbSize = calculateRGBOutputSize(sizeof(canvas));
#endif
unsigned char output[rgbSize];
memset(output, 0, rgbSize);
blink::RGBAtoRGB(canvas, static_cast<unsigned>(pixels), output);
EXPECT_EQ(memcmp(expected, output, rgbSize), 0);
}
#ifdef __ARM_NEON__
TEST_F(RGBAtoRGBTest, testCaseEven16pixels) {
unsigned char canvas[] = {
255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255,
0, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 255, 0, 0, 255, 128, 0, 0, 255,
128, 0, 0, 255, 128, 0, 0, 255, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128};
const size_t pixels = calculateRGBAPixels(sizeof(canvas));
const size_t rgbSize = calculateRGBOutputSize(sizeof(canvas));
unsigned char output[rgbSize];
unsigned char expected[rgbSize];
memset(output, 0, rgbSize);
memset(expected, 0, rgbSize);
blink::RGBAtoRGBScalar(canvas, static_cast<unsigned>(pixels), expected);
blink::RGBAtoRGBNeon(canvas, static_cast<unsigned>(pixels), output);
EXPECT_EQ(memcmp(expected, output, rgbSize), 0);
}
TEST_F(RGBAtoRGBTest, testCaseOdd17pixels) {
unsigned char canvas[] = {
255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 0, 255, 128, 0, 0, 255, 128, 0, 0,
255, 128, 0, 0, 255, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128, 10, 10, 10, 100};
const size_t pixels = calculateRGBAPixels(sizeof(canvas));
const size_t rgbSize = calculateRGBOutputSize(sizeof(canvas));
unsigned char output[rgbSize];
unsigned char expected[rgbSize];
memset(output, 0, rgbSize);
memset(expected, 0, rgbSize);
blink::RGBAtoRGBScalar(canvas, static_cast<unsigned>(pixels), expected);
blink::RGBAtoRGBNeon(canvas, static_cast<unsigned>(pixels), output);
EXPECT_EQ(memcmp(expected, output, rgbSize), 0);
}
TEST_F(RGBAtoRGBTest, testCaseEven32pixels) {
unsigned char canvas[] = {
255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0, 0,
255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 0, 255, 128, 0, 0, 255, 128, 0, 0, 255, 128, 0,
0, 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 255, 128, 128, 128, 255, 128, 128, 128,
255, 128, 128, 128, 255, 255, 0, 0, 255, 255, 0, 0, 255, 255, 0,
0, 255, 255, 0, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0,
255, 0, 255, 0, 255, 0, 255, 0, 0, 255, 128, 0, 0, 255, 128,
0, 0, 255, 128, 0, 0, 255, 128};
const size_t pixels = calculateRGBAPixels(sizeof(canvas));
const size_t rgbSize = calculateRGBOutputSize(sizeof(canvas));
unsigned char output[rgbSize];
unsigned char expected[rgbSize];
memset(output, 0, rgbSize);
memset(expected, 0, rgbSize);
blink::RGBAtoRGBScalar(canvas, static_cast<unsigned>(pixels), expected);
blink::RGBAtoRGBNeon(canvas, static_cast<unsigned>(pixels), output);
EXPECT_EQ(memcmp(expected, output, rgbSize), 0);
}
static base::TimeDelta testNpixels(bool fastPath = true,
const size_t width = 1024,
const size_t height = 1024,
bool setAlpha = true) {
const size_t pixels = width * height;
const size_t canvasLen = channelsRGBA * width * height;
const size_t outputLen = channelsRGB * width * height;
unsigned char* canvas = new unsigned char[canvasLen];
unsigned char* output = new unsigned char[outputLen];
auto cleanup = [&]() {
if (canvas)
delete[] canvas;
if (output)
delete[] output;
};
if (!canvas || !output) {
cleanup();
return base::TimeDelta();
}
if (setAlpha) {
memset(canvas, 128, canvasLen);
} else {
memset(canvas, 200, canvasLen);
}
base::ElapsedTimer runTime;
if (fastPath) {
blink::RGBAtoRGBNeon(canvas, static_cast<unsigned>(pixels), output);
} else {
blink::RGBAtoRGBScalar(canvas, static_cast<unsigned>(pixels), output);
}
auto result = runTime.Elapsed();
cleanup();
return result;
}
TEST_F(RGBAtoRGBTest, testPerf1k) {
auto neonElapsed = testNpixels();
auto scalarElapsed = testNpixels(false);
EXPECT_TRUE(neonElapsed < scalarElapsed)
<< "Neon: " << neonElapsed << "\tScalar: " << scalarElapsed << std::endl;
}
TEST_F(RGBAtoRGBTest, testPerf4k) {
auto neonElapsed = testNpixels(true, 4000, 4000);
auto scalarElapsed = testNpixels(false, 4000, 4000);
EXPECT_TRUE(neonElapsed < scalarElapsed)
<< "Neon: " << neonElapsed << "\tScalar: " << scalarElapsed << std::endl;
}
// This width will force the tail case, cause width = (16 * 64) + 15.
static bool testRandNpixels(const size_t width = 1039,
const size_t height = 1024,
bool setAlpha = true) {
const size_t pixels = width * height;
const size_t canvasLen = channelsRGBA * pixels;
const size_t outputLen = channelsRGB * pixels;
unsigned char* canvas = new unsigned char[canvasLen];
unsigned char* expected = new unsigned char[outputLen];
unsigned char* output = new unsigned char[outputLen];
auto cleanup = [&]() {
if (canvas)
delete[] canvas;
if (expected)
delete[] expected;
if (output)
delete[] output;
};
if (!canvas || !output || !expected) {
cleanup();
return false;
}
if (setAlpha) {
memset(canvas, 128, canvasLen);
} else {
memset(canvas, 200, canvasLen);
}
srand(time(0));
unsigned char* ptr = canvas;
for (size_t i = 0; i < pixels; ++i) {
*ptr++ = static_cast<unsigned char>(rand() % 255);
*ptr++ = static_cast<unsigned char>(rand() % 255);
*ptr++ = static_cast<unsigned char>(rand() % 255);
*ptr++ = static_cast<unsigned char>(rand() % 255);
}
blink::RGBAtoRGBScalar(canvas, static_cast<unsigned>(pixels), expected);
blink::RGBAtoRGBNeon(canvas, static_cast<unsigned>(pixels), output);
bool result = memcmp(expected, output, outputLen) == 0;
cleanup();
return result;
}
TEST_F(RGBAtoRGBTest, randomPixels) {
EXPECT_TRUE(testRandNpixels());
}
#endif
} // namespace blink
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