1 files changed, 70 insertions, 0 deletions
diff --git a/src/tests/dummy.c b/src/tests/dummy.c
new file mode 100644
index 0000000..0e87a2c
--- /dev/null
+++ b/src/tests/dummy.c
@@ -0,0 +1,70 @@
+#include "gpu_tests.h"
+
+#include <libplacebo/dummy.h>
+
+int main()
+{
+    pl_log log = pl_test_logger();
+    pl_gpu gpu = pl_gpu_dummy_create(log, NULL);
+    pl_buffer_tests(gpu);
+    pl_texture_tests(gpu);
+
+    // Attempt creating a shader and accessing the resulting LUT
+    pl_tex dummy = pl_tex_dummy_create(gpu, pl_tex_dummy_params(
+        .w = 100,
+        .h = 100,
+        .format = pl_find_named_fmt(gpu, "rgba8"),
+    ));
+
+    struct pl_sample_src src = {
+        .tex = dummy,
+        .new_w = 1000,
+        .new_h = 1000,
+    };
+
+    pl_shader_obj lut = NULL;
+    struct pl_sample_filter_params filter_params = {
+        .filter = pl_filter_ewa_lanczos,
+        .lut = &lut,
+    };
+
+    pl_shader sh = pl_shader_alloc(log, pl_shader_params( .gpu = gpu ));
+    REQUIRE(pl_shader_sample_polar(sh, &src, &filter_params));
+    const struct pl_shader_res *res = pl_shader_finalize(sh);
+    REQUIRE(res);
+
+    for (int n = 0; n < res->num_descriptors; n++) {
+        const struct pl_shader_desc *sd = &res->descriptors[n];
+        if (sd->desc.type != PL_DESC_SAMPLED_TEX)
+            continue;
+
+        pl_tex tex = sd->binding.object;
+        const float *data = (float *) pl_tex_dummy_data(tex);
+        if (!data)
+            continue; // means this was the `dummy` texture
+
+#ifdef PRINT_LUTS
+        for (int i = 0; i < tex->params.w; i++)
+            printf("lut[%d] = %f\n", i, data[i]);
+#endif
+    }
+
+    // Try out generation of the sampler2D interface
+    src.tex = NULL;
+    src.tex_w = 100;
+    src.tex_h = 100;
+    src.format = PL_FMT_UNORM;
+    src.sampler = PL_SAMPLER_NORMAL;
+    src.mode = PL_TEX_SAMPLE_LINEAR;
+
+    pl_shader_reset(sh, pl_shader_params( .gpu = gpu ));
+    REQUIRE(pl_shader_sample_polar(sh, &src, &filter_params));
+    REQUIRE((res = pl_shader_finalize(sh)));
+    REQUIRE_CMP(res->input, ==, PL_SHADER_SIG_SAMPLER, "u");
+
+    pl_shader_free(&sh);
+    pl_shader_obj_destroy(&lut);
+    pl_tex_destroy(gpu, &dummy);
+    pl_gpu_dummy_destroy(&gpu);
+    pl_log_destroy(&log);
+}