1 files changed, 107 insertions, 0 deletions
diff --git a/subprojects/pixpat/pixpat-native/tests/test_pixpat.cpp b/subprojects/pixpat/pixpat-native/tests/test_pixpat.cpp
new file mode 100644
index 0000000..8319968
--- /dev/null
+++ b/subprojects/pixpat/pixpat-native/tests/test_pixpat.cpp
@@ -0,0 +1,107 @@
+/*
+ * Native C++ smoke test for libpixpat.
+ *
+ * Scope is narrow: prove that the public header, the shared library,
+ * and the C ABI surface are wired up correctly when consumed from C++.
+ * Behavioral coverage (formats, patterns, error paths, threading,
+ * conversion matrix) lives in the Python test suite, which exercises
+ * the same C ABI with much less boilerplate.
+ */
+
+#include <pixpat/pixpat.h>
+
+#include <cstdint>
+#include <cstdio>
+#include <vector>
+
+// CHECK always evaluates its expression so the test still runs in
+// release builds where assert() is compiled out.
+#define CHECK(expr) do {                                                  \
+		if (!(expr)) {                                            \
+			std::fprintf(stderr, "%s:%d: CHECK failed: %s\n", \
+				     __FILE__, __LINE__, #expr);          \
+			return 1;                                         \
+		}                                                         \
+} while (0)
+
+int main()
+{
+	// Format introspection.
+	CHECK(pixpat_format_count() > 0);
+	CHECK(pixpat_format_name(0) != nullptr);
+	CHECK(pixpat_format_supported("XRGB8888") == 1);
+	CHECK(pixpat_format_supported("NOT_A_REAL_FORMAT") == 0);
+
+	// Draw a pattern into an RGB buffer.
+	const uint32_t w = 64, h = 32;
+	std::vector<uint8_t> rgb(w * h * 4, 0);
+	pixpat_buffer fb{};
+	fb.format = "XRGB8888";
+	fb.width = w;
+	fb.height = h;
+	fb.num_planes = 1;
+	fb.planes[0] = rgb.data();
+	fb.strides[0] = w * 4;
+
+	pixpat_pattern_opts pat{};
+	pat.rec = PIXPAT_REC_BT709;
+	pat.range = PIXPAT_RANGE_LIMITED;
+	CHECK(pixpat_draw_pattern(&fb, "smpte", &pat) == 0);
+	// Cover the NULL-opts path.
+	CHECK(pixpat_draw_pattern(&fb, nullptr, nullptr) == 0);
+
+	// Plain pattern: hex color via opts->params. BGR888-style byte
+	// order means the first pixel of XRGB8888 stores B at byte 0,
+	// G at byte 1, R at byte 2.
+	pixpat_pattern_opts plain_opts{};
+	plain_opts.params = "color=ff0000";
+	CHECK(pixpat_draw_pattern(&fb, "plain", &plain_opts) == 0);
+	CHECK(rgb[0] == 0x00 && rgb[1] == 0x00 && rgb[2] == 0xFF);
+	// Missing/malformed params for `plain` must fail.
+	plain_opts.params = nullptr;
+	CHECK(pixpat_draw_pattern(&fb, "plain", &plain_opts) == -1);
+	plain_opts.params = "color=zzzzzz";
+	CHECK(pixpat_draw_pattern(&fb, "plain", &plain_opts) == -1);
+	// Top-level params parse failure also fails the call.
+	plain_opts.params = "foo,bar";
+	CHECK(pixpat_draw_pattern(&fb, "plain", &plain_opts) == -1);
+
+	// Cover the rest of the pattern catalog. None of these accept
+	// failure at the C-API entry point with valid inputs.
+	pixpat_pattern_opts po{};
+	CHECK(pixpat_draw_pattern(&fb, "checker", nullptr) == 0);     // default cell
+	po.params = "cell=1";
+	CHECK(pixpat_draw_pattern(&fb, "checker", &po) == 0);
+	po.params = "cell=0";
+	CHECK(pixpat_draw_pattern(&fb, "checker", &po) == -1);        // non-positive
+	po.params = "cell=oops";
+	CHECK(pixpat_draw_pattern(&fb, "checker", &po) == -1);        // non-numeric
+	CHECK(pixpat_draw_pattern(&fb, "hramp",     nullptr) == 0);
+	CHECK(pixpat_draw_pattern(&fb, "vramp",     nullptr) == 0);
+	CHECK(pixpat_draw_pattern(&fb, "dramp",     nullptr) == 0);
+	CHECK(pixpat_draw_pattern(&fb, "zoneplate", nullptr) == 0);
+
+	// Convert into the normalized wide RGB format.
+	std::vector<uint8_t> wide(w * h * 8, 0);
+	pixpat_buffer dst{};
+	dst.format = "ABGR16161616";
+	dst.width = w;
+	dst.height = h;
+	dst.num_planes = 1;
+	dst.planes[0] = wide.data();
+	dst.strides[0] = w * 8;
+	CHECK(pixpat_convert(&dst, &fb, nullptr) == 0);
+
+	// Error path: unknown format must return -1, not crash.
+	uint8_t dummy[4]{};
+	pixpat_buffer bad{};
+	bad.format = "NOT_A_REAL_FORMAT";
+	bad.width = 1;
+	bad.height = 1;
+	bad.num_planes = 1;
+	bad.planes[0] = dummy;
+	bad.strides[0] = 4;
+	CHECK(pixpat_draw_pattern(&bad, "smpte", &pat) == -1);
+
+	return 0;
+}