OXYGENHUB
◆ main openmsx / src / unittest / VectorPathDsl_test.cc
5.5 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "catch.hpp"
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#include "VectorPathDsl.hh"
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#include "VectorPath.hh"
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#include <array>
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#include <cstdint>
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#include <span>
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using namespace VectorPath;
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using namespace VectorPath::dsl;
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template<size_t N>
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static void checkEqualBytes(std::span<const uint8_t> actual,
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                            const std::array<uint8_t, N>& expected)
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{
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	CHECK(actual.size() == N);
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	for (size_t i = 0; i < N; ++i) {
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		CHECK(actual[i] == expected[i]);
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	}
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}
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TEST_CASE("path_single_line_int16")
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{
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	static constexpr auto blob = path<int16_t>(
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		from(10, 20),
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		line(30, 40));
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	static constexpr std::array<uint8_t, 10> expected = {
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		1,                   // segment count
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		10, 0, 20, 0,        // anchor
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		0,                   // flags: line
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		30, 0, 40, 0,        // line endpoint
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	};
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	checkEqualBytes(std::span(blob), expected);
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	ByteReader reader(blob);
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	CHECK(reader.get<uint8_t>() ==  1); // segment count
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	CHECK(reader.get<int16_t>() == 10); // anchor x
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	CHECK(reader.get<int16_t>() == 20); // anchor y
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	CHECK(reader.get<uint8_t>() ==  0); // segment flags
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	CHECK(reader.get<int16_t>() == 30); // line x
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	CHECK(reader.get<int16_t>() == 40); // line y
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	CHECK(reader.empty());              // fully consumed
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}
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TEST_CASE("path_cubic_sets_flag_bit")
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{
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	static constexpr auto blob = path<int16_t>(
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		from(0, 0),
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		curve(1, 2, 3, 4, 5, 6));
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	ByteReader reader(blob);
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	CHECK(reader.get<uint8_t>() == 1); // segment count
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	CHECK(reader.get<int16_t>() == 0); // anchor x
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	CHECK(reader.get<int16_t>() == 0); // anchor y
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	CHECK(reader.get<uint8_t>() == 1); // cubic flag bit 0
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	CHECK(reader.get<int16_t>() == 1); // cx1
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	CHECK(reader.get<int16_t>() == 2); // cy1
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	CHECK(reader.get<int16_t>() == 3); // cx2
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	CHECK(reader.get<int16_t>() == 4); // cy2
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	CHECK(reader.get<int16_t>() == 5); // x
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	CHECK(reader.get<int16_t>() == 6); // y
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	CHECK(reader.empty());             // fully consumed
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}
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TEST_CASE("path_mixed_segments_and_second_flag_byte")
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{
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	static constexpr auto blob = path<int16_t>(
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		from(0, 0),
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		line(1, 1), line(2, 2), line(3, 3), line(4, 4),
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		line(5, 5), line(6, 6), line(7, 7), line(8, 8),
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		curve(9, 9, 10, 10, 11, 11));
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	CHECK(blob.size() == 1 + 4 + 1 + 8 * 4 + 1 + 12); // nine-segment path size
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	ByteReader reader(blob);
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	CHECK(reader.get<uint8_t>() == 9); // segment count
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	(void)reader.get<int16_t>();
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	(void)reader.get<int16_t>(); // anchor
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	CHECK(reader.get<uint8_t>() == 0); // first flag byte: all lines
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	for (int i = 0; i < 8; ++i) {
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		(void)reader.get<int16_t>();
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		(void)reader.get<int16_t>();
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	}
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	CHECK(reader.get<uint8_t>() == 1); // second flag byte: cubic
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	CHECK(reader.get<int16_t>() == 9); // curve start
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	CHECK(reader.empty() == false); // curve not finished
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}
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TEST_CASE("path_int8_coordinates")
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{
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	static constexpr auto blob = path<int8_t>(
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		from(1, 2),
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		line(3, 4));
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	CHECK(blob.size() == 1 + 2 + 1 + 2); // int8 path size
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	ByteReader reader(blob);
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	CHECK(reader.get<uint8_t>() == 1); // segment count
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	CHECK(reader.get<int8_t>()  == 1); // anchor x
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	CHECK(reader.get<int8_t>()  == 2); // anchor y
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	CHECK(reader.get<uint8_t>() == 0); // flags
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	CHECK(reader.get<int8_t>()  == 3); // line x
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	CHECK(reader.get<int8_t>()  == 4); // line y
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	CHECK(reader.empty());             // fully consumed
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}
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TEST_CASE("stroke_collection_open_and_closed")
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{
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	static constexpr auto blob = strokeCollection<int16_t>(
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		openPath(from(0, 0), line(1, 1)),
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		closedPath(from(2, 2), line(3, 3), line(4, 4)));
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	static constexpr size_t path0Size = 1 + 4 + 1 + 4;
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	static constexpr size_t path1Size = 1 + 4 + 1 + 4 + 4;
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	CHECK(blob.size() == 1 + 1 + path0Size + path1Size); // collection size
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	ByteReader reader(blob);
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	CHECK(reader.get<uint8_t>() == 2); // path count
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	CHECK(reader.get<uint8_t>() == 2); // open=0, closed=1 -> bit 1 set
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	// path 0
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	CHECK(reader.get<uint8_t>() == 1); // path0 segment count
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	CHECK(reader.get<int16_t>() == 0); // path0 anchor x
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	CHECK(reader.get<int16_t>() == 0); // path0 anchor y
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	CHECK(reader.get<uint8_t>() == 0); // path0 flags
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	CHECK(reader.get<int16_t>() == 1); // path0 line x
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	CHECK(reader.get<int16_t>() == 1); // path0 line y
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	// path 1
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	CHECK(reader.get<uint8_t>() == 2); // path1 segment count
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	CHECK(reader.get<int16_t>() == 2); // path1 anchor x
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	CHECK(reader.get<int16_t>() == 2); // path1 anchor y
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	CHECK(reader.get<uint8_t>() == 0); // path1 flags
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	CHECK(reader.get<int16_t>() == 3); // path1 line1 x
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	CHECK(reader.get<int16_t>() == 3); // path1 line1 y
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	CHECK(reader.get<int16_t>() == 4); // path1 line2 x
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	CHECK(reader.get<int16_t>() == 4); // path1 line2 y
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	CHECK(reader.empty());             // collection fully consumed
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}
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TEST_CASE("stroke_collection_nine_paths_second_stroke_flag_byte")
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{
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	static constexpr auto blob = strokeCollection<int16_t>(
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		openPath(from(0, 0), line(1, 1)),
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		closedPath(from(0, 0), line(1, 1)));
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	constexpr size_t pathSize = 1 + 4 + 1 + 4;
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	CHECK(blob.size() == 1 + 2 + 9 * pathSize); // nine-path collection size
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	ByteReader reader(blob);
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	CHECK(reader.get<uint8_t>() == 9); // path count
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	CHECK(reader.get<uint8_t>() == 0); // first stroke-flag byte
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	CHECK(reader.get<uint8_t>() == 1); // second stroke-flag byte: path 8 closed
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}
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TEST_CASE("compile_time_path_sizes")
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{
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	static constexpr auto linePath = path<int16_t>(from(0, 0), line(1, 1));
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	static constexpr auto curvePath = path<int16_t>(
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		from(0, 0), curve(1, 2, 3, 4, 5, 6));
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	static_assert(linePath.size() == 10);
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	static_assert(curvePath.size() == 1 + 4 + 1 + 12);
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}