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#include "image_processor.hh"
#include "config.h"
#include "image.hh"
#include "image_loader.hh"
#include "spawner.hh"
#include <bit>
#include <cmath>
#include <cstdint>
#include <filesystem>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <memory>
#include <string>
#include <utility>
#ifndef TESTDIR
# define TESTDIR "."
#endif
namespace {
// JPEG compression at quality 90
constexpr int kLossyError = 32;
MATCHER_P(ColourLossyEq, expected, "") {
uint8_t a1 = arg >> 24;
uint8_t e1 = expected >> 24;
uint8_t a2 = arg >> 16;
uint8_t e2 = expected >> 16;
uint8_t a3 = arg >> 8;
uint8_t e3 = expected >> 8;
uint8_t a4 = arg;
uint8_t e4 = expected;
return abs(static_cast<int>(a1) - static_cast<int>(e1)) <= kLossyError &&
abs(static_cast<int>(a2) - static_cast<int>(e2)) <= kLossyError &&
abs(static_cast<int>(a3) - static_cast<int>(e3)) <= kLossyError &&
abs(static_cast<int>(a4) - static_cast<int>(e4)) <= kLossyError;
}
std::string error2str(ImageLoadError err) {
switch (err) {
case ImageLoadError::kNoSuchFile:
return "no such file";
case ImageLoadError::kError:
return "error";
case ImageLoadError::kUnsupportedFormat:
return "unsupported format";
case ImageLoadError::kProcessError:
return "process error";
}
std::unreachable();
}
class ImageProcessorTest : public testing::Test {
protected:
void SetUp() override {
{
auto spawner = Spawner::create();
ASSERT_TRUE(spawner.has_value());
spawner_ = std::move(spawner.value());
}
{
auto process = spawner_->run(Spawner::Exec::kImageProcessor);
ASSERT_TRUE(process.has_value());
process_ = std::move(process.value());
}
}
[[nodiscard]]
Process& process() const {
return *process_;
}
[[nodiscard]]
static std::filesystem::path testdir() {
return TESTDIR;
}
void peek(std::string const& name) {
auto ret = image_processor::peek(process(), testdir() / name);
ASSERT_TRUE(ret.has_value()) << error2str(ret.error());
EXPECT_EQ(10, ret->width);
EXPECT_EQ(10, ret->height);
}
private:
std::unique_ptr<Spawner> spawner_;
std::unique_ptr<Process> process_;
};
enum class AlphaMode : uint8_t {
kFull,
kMono,
kNone,
};
class ImageProcessorTestWithFormat : public ImageProcessorTest, public testing::WithParamInterface<Image::Format> {
protected:
void load(std::string const& name, AlphaMode alpha = AlphaMode::kFull, bool lossy = false) {
auto ret = image_processor::load(process(), testdir() / name, GetParam());
ASSERT_TRUE(ret.has_value()) << error2str(ret.error());
EXPECT_EQ(10, ret.value()->width());
EXPECT_EQ(10, ret.value()->height());
EXPECT_EQ(GetParam(), ret.value()->format());
EXPECT_GE(4 * ret.value()->width(), ret.value()->scanline());
if (lossy) {
for (uint32_t y = 0; y < ret.value()->height(); ++y) {
for (uint32_t x = 0; x < ret.value()->width(); ++x) {
EXPECT_THAT(reinterpret_cast<uint32_t const*>(
ret.value()->data() + (y * ret.value()->scanline()))[x],
ColourLossyEq(expected_color(x, y, alpha)))
<< x << "x" << y;
}
}
} else {
for (uint32_t y = 0; y < ret.value()->height(); ++y) {
for (uint32_t x = 0; x < ret.value()->width(); ++x) {
EXPECT_EQ(expected_color(x, y, alpha),
reinterpret_cast<uint32_t const*>(
ret.value()->data() + (y * ret.value()->scanline()))[x])
<< x << "x" << y;
}
}
}
}
private:
static uint32_t expected_argb(uint32_t x, uint32_t y) {
uint32_t argb;
if (x < 5) {
if (y < 5) {
argb = 0xffff0000;
} else {
argb = 0xff0000ff;
}
} else {
if (y < 5) {
argb = 0xff00ff00;
} else {
argb = 0x80ff0000;
}
}
return argb;
}
static uint32_t argb_to_format(uint32_t argb) {
if constexpr (std::endian::native == std::endian::big) {
switch (GetParam()) {
case Image::Format::ARGB_8888:
return argb;
case Image::Format::BGRA_8888:
return std::byteswap(argb);
case Image::Format::RGBA_8888:
return std::rotl(argb, 8);
case Image::Format::ABGR_8888:
return std::byteswap(std::rotl(argb, 8));
}
} else {
switch (GetParam()) {
case Image::Format::ARGB_8888:
return std::byteswap(argb);
case Image::Format::BGRA_8888:
return argb;
case Image::Format::RGBA_8888:
return std::byteswap(std::rotl(argb, 8));
case Image::Format::ABGR_8888:
return std::rotl(argb, 8);
}
}
std::unreachable();
}
static uint32_t expected_color(uint32_t x, uint32_t y, AlphaMode alpha) {
uint32_t argb = expected_argb(x, y);
switch (alpha) {
case AlphaMode::kFull:
break;
case AlphaMode::kMono:
if (argb >> 24 != 0xff)
argb = 0;
break;
case AlphaMode::kNone:
argb |= 0xff000000;
break;
}
return argb_to_format(argb);
}
static uint32_t expected_color_no_alpha(uint32_t x, uint32_t y) {
return argb_to_format(0xff000000 | expected_argb(x, y));
}
};
} // namespace
TEST_F(ImageProcessorTest, peek_no_such_file) {
auto ret = image_processor::peek(process(), testdir() / "does_not_exist.png");
ASSERT_FALSE(ret.has_value());
EXPECT_EQ(ImageLoadError::kNoSuchFile, ret.error());
}
#if HAVE_PNG
TEST_F(ImageProcessorTest, peek_png) {
peek("test.png");
}
TEST_P(ImageProcessorTestWithFormat, load_png) {
load("test.png");
}
#endif
#if HAVE_JPEG
TEST_F(ImageProcessorTest, peek_jpeg) {
peek("test.jpeg");
}
TEST_P(ImageProcessorTestWithFormat, load_jpeg) {
load("test.jpeg", AlphaMode::kNone, /* lossy */ true);
}
#endif
#if HAVE_XPM
TEST_F(ImageProcessorTest, peek_xpm) {
peek("test.xpm");
}
TEST_P(ImageProcessorTestWithFormat, load_xpm) {
load("test.xpm", AlphaMode::kMono);
}
#endif
#if HAVE_RSVG
TEST_F(ImageProcessorTest, peek_svg) {
peek("test.svg");
}
TEST_P(ImageProcessorTestWithFormat, load_svg) {
load("test.svg");
}
#endif
INSTANTIATE_TEST_SUITE_P(ImageProcessor,
ImageProcessorTestWithFormat,
testing::Values(Image::Format::RGBA_8888,
Image::Format::ARGB_8888,
Image::Format::BGRA_8888,
Image::Format::ABGR_8888));
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