1 files changed, 41 insertions, 0 deletions
diff --git a/src/tests/dither.c b/src/tests/dither.c
new file mode 100644
index 0000000..c9f639c
--- /dev/null
+++ b/src/tests/dither.c
@@ -0,0 +1,41 @@
+#include "tests.h"
+
+#include <libplacebo/dither.h>
+#include <libplacebo/shaders/dithering.h>
+
+#define SHIFT 4
+#define SIZE (1 << SHIFT)
+float data[SIZE][SIZE];
+
+int main()
+{
+    printf("Ordered dither matrix:\n");
+    pl_generate_bayer_matrix(&data[0][0], SIZE);
+    for (int y = 0; y < SIZE; y++) {
+        for (int x = 0; x < SIZE; x++)
+            printf(" %3d", (int)(data[y][x] * SIZE * SIZE));
+        printf("\n");
+    }
+
+    printf("Blue noise dither matrix:\n");
+    pl_generate_blue_noise(&data[0][0], SHIFT);
+    for (int y = 0; y < SIZE; y++) {
+        for (int x = 0; x < SIZE; x++)
+            printf(" %3d", (int)(data[y][x] * SIZE * SIZE));
+        printf("\n");
+    }
+
+    // Generate an example of a dither shader
+    pl_log log = pl_test_logger();
+    pl_shader sh = pl_shader_alloc(log, NULL);
+    pl_shader_obj obj = NULL;
+
+    pl_shader_dither(sh, 8, &obj, NULL);
+    const struct pl_shader_res *res = pl_shader_finalize(sh);
+    REQUIRE(res);
+    printf("Generated dither shader:\n%s\n", res->glsl);
+
+    pl_shader_obj_destroy(&obj);
+    pl_shader_free(&sh);
+    pl_log_destroy(&log);
+}