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pcx_test.zig
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pcx_test.zig
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// some basic tests, just to make sure well formed images are handled
const std = @import("std");
const pcx = @import("pcx.zig");
var mem: [1000 * 1024]u8 = undefined;
var gfa = std.heap.FixedBufferAllocator.init(&mem);
fn testLoadComptime(
comptime branch_quota: comptime_int,
comptime basename: []const u8,
comptime indexed: bool,
) void {
comptime {
@setEvalBranchQuota(branch_quota);
const pcxfile = @embedFile("testdata/" basename ".pcx");
var fbs = std.io.fixedBufferStream(pcxfile);
var reader = fbs.reader();
const preloaded = try pcx.preload(reader);
const width: usize = preloaded.width;
const height: usize = preloaded.height;
if (indexed) {
var pixels: [width * height]u8 = undefined;
var palette: [768]u8 = undefined;
try pcx.loadIndexed(reader, preloaded, &pixels, &palette);
try std.testing.expect(std.mem.eql(
u8,
&pixels,
@embedFile("testdata/" basename "-raw-indexed.data"),
));
try std.testing.expect(std.mem.eql(
u8,
&palette,
@embedFile("testdata/" basename "-raw-indexed.data.pal"),
));
} else {
var pixels: [width * height * 3]u8 = undefined;
try pcx.loadRGB(reader, preloaded, &pixels);
try std.testing.expect(std.mem.eql(
u8,
&pixels,
@embedFile("testdata/" basename "-raw-r8g8b8.data"),
));
}
}
}
fn testLoadRuntime(comptime basename: []const u8, indexed: bool) !void {
defer gfa.end_index = 0;
const pcxfile = @embedFile("testdata/" basename ".pcx");
var fbs = std.io.fixedBufferStream(pcxfile);
const reader = fbs.reader();
const preloaded = try pcx.preload(reader);
const width: usize = preloaded.width;
const height: usize = preloaded.height;
if (indexed) {
var pixels = try gfa.allocator().alloc(u8, width * height);
var palette: [768]u8 = undefined;
try pcx.loadIndexed(reader, preloaded, pixels, &palette);
try std.testing.expect(std.mem.eql(
u8,
pixels,
@embedFile("testdata/" basename "-raw-indexed.data"),
));
try std.testing.expect(std.mem.eql(
u8,
&palette,
@embedFile("testdata/" basename "-raw-indexed.data.pal"),
));
} else {
var rgb = try gfa.allocator().alloc(u8, width * height * 3);
try pcx.loadRGB(reader, preloaded, rgb);
try std.testing.expect(std.mem.eql(
u8,
rgb,
@embedFile("testdata/" basename "-raw-r8g8b8.data"),
));
}
}
test "load space_merc.pcx indexed comptime" {
testLoadComptime(20000, "space_merc", true);
}
test "load space_merc.pcx rgb comptime" {
testLoadComptime(20000, "space_merc", false);
}
test "load space_merc.pcx indexed runtime" {
try testLoadRuntime("space_merc", true);
}
test "load space_merc.pcx rgb runtime" {
try testLoadRuntime("space_merc", false);
}
// comptime loading is slow so skip these tests
test "load lena64.pcx indexed comptime" {
if (true) return error.SkipZigTest;
testLoadComptime(100000, "lena64", true);
}
test "load lena128.pcx indexed comptime" {
if (true) return error.SkipZigTest;
testLoadComptime(200000, "lena128", true);
}
test "load lena256.pcx indexed comptime" {
if (true) return error.SkipZigTest;
testLoadComptime(500000, "lena256", true);
}
// this one crashes after 20 seconds with the message "fork failed"
test "load lena512.pcx indexed comptime" {
if (true) return error.SkipZigTest;
testLoadComptime(20000000, "lena512", true);
}
test "load lena512.pcx indexed runtime" {
try testLoadRuntime("lena512", true);
}
test "load lena512.pcx rgb runtime" {
try testLoadRuntime("lena512", false);
}
// note: these resized lena images are not very useful for testing the loader
// (especially since they have even dimensions and as photos they are not
// suited for RLE), but they are useful for benchmarking, which i want to do
// eventually
test "load lena256.pcx indexed runtime" {
try testLoadRuntime("lena256", true);
}
test "load lena256.pcx rgb runtime" {
try testLoadRuntime("lena256", false);
}
test "load lena128.pcx indexed runtime" {
try testLoadRuntime("lena128", true);
}
test "load lena128.pcx rgb runtime" {
try testLoadRuntime("lena128", false);
}
test "load lena64.pcx indexed runtime" {
try testLoadRuntime("lena64", true);
}
test "load lena64.pcx rgb runtime" {
try testLoadRuntime("lena64", false);
}
fn testSave(comptime basename: []const u8, w: usize, h: usize) !void {
const pcxfile = @embedFile("testdata/" basename ".pcx");
var outbuf: [pcxfile.len]u8 = undefined;
var fbs = std.io.fixedBufferStream(&outbuf);
try pcx.saveIndexed(
fbs.writer(),
w,
h,
@embedFile("testdata/" basename "-raw-indexed.data"),
@embedFile("testdata/" basename "-raw-indexed.data.pal"),
);
const result = fbs.getWritten();
try std.testing.expect(
std.mem.eql(u8, result[0..12], pcxfile[0..12]) and
// skip hres, vres, reserved
std.mem.eql(u8, result[65..70], pcxfile[65..70]) and
// skip padding
std.mem.eql(u8, result[128..], pcxfile[128..]),
);
}
test "save space_merc.pcx comptime" {
comptime {
@setEvalBranchQuota(20000);
try testSave("space_merc", 32, 32);
}
}
test "save lena64.pcx comptime" {
if (true) return error.SkipZigTest;
comptime {
@setEvalBranchQuota(100000);
try testSave("lena64", 64, 64);
}
}
test "save lena128.pcx comptime" {
if (true) return error.SkipZigTest;
comptime {
@setEvalBranchQuota(500000);
try testSave("lena128", 128, 128);
}
}
// this one crashes with "fork failed"
test "save lena256.pcx comptime" {
if (true) return error.SkipZigTest;
comptime {
@setEvalBranchQuota(2000000);
try testSave("lena256", 256, 256);
}
}
// haven't even tried this one
test "save lena512.pcx comptime" {
if (true) return error.SkipZigTest;
comptime {
@setEvalBranchQuota(10000000);
try testSave("lena512", 512, 512);
}
}
test "save space_merc.pcx runtime" {
try testSave("space_merc", 32, 32);
}
test "save lena64.pcx runtime" {
try testSave("lena64", 64, 64);
}
test "save lena128.pcx runtime" {
try testSave("lena128", 128, 128);
}
test "save lena256.pcx runtime" {
try testSave("lena256", 256, 256);
}
test "save lena512.pcx runtime" {
try testSave("lena512", 512, 512);
}