Add renderer sampler state contract

src/renderer_api/renderer_api.cpp

@@ -242,6 +242,60 @@ pp::foundation::Status validate_depth_state(DepthState state) noexcept
     return validate_compare_op(state.compare);
 }
 
+pp::foundation::Status validate_sampler_filter(SamplerFilter filter) noexcept
+{
+    switch (filter) {
+    case SamplerFilter::nearest:
+    case SamplerFilter::linear:
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("sampler filter is not supported");
+}
+
+pp::foundation::Status validate_sampler_address_mode(SamplerAddressMode mode) noexcept
+{
+    switch (mode) {
+    case SamplerAddressMode::clamp_to_edge:
+    case SamplerAddressMode::repeat:
+    case SamplerAddressMode::mirrored_repeat:
+    case SamplerAddressMode::clamp_to_border:
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("sampler address mode is not supported");
+}
+
+pp::foundation::Status validate_sampler_desc(SamplerDesc desc) noexcept
+{
+    const auto min_filter = validate_sampler_filter(desc.min_filter);
+    if (!min_filter.ok()) {
+        return min_filter;
+    }
+
+    const auto mag_filter = validate_sampler_filter(desc.mag_filter);
+    if (!mag_filter.ok()) {
+        return mag_filter;
+    }
+
+    const auto mip_filter = validate_sampler_filter(desc.mip_filter);
+    if (!mip_filter.ok()) {
+        return mip_filter;
+    }
+
+    const auto address_u = validate_sampler_address_mode(desc.address_u);
+    if (!address_u.ok()) {
+        return address_u;
+    }
+
+    const auto address_v = validate_sampler_address_mode(desc.address_v);
+    if (!address_v.ok()) {
+        return address_v;
+    }
+
+    return validate_sampler_address_mode(desc.address_w);
+}
+
 pp::foundation::Status validate_mesh_desc(MeshDesc desc) noexcept
 {
     if (desc.vertex_count == 0) {
@@ -493,4 +547,32 @@ const char* compare_op_name(CompareOp op) noexcept
     return "unknown";
 }
 
+const char* sampler_filter_name(SamplerFilter filter) noexcept
+{
+    switch (filter) {
+    case SamplerFilter::nearest:
+        return "nearest";
+    case SamplerFilter::linear:
+        return "linear";
+    }
+
+    return "unknown";
+}
+
+const char* sampler_address_mode_name(SamplerAddressMode mode) noexcept
+{
+    switch (mode) {
+    case SamplerAddressMode::clamp_to_edge:
+        return "clamp_to_edge";
+    case SamplerAddressMode::repeat:
+        return "repeat";
+    case SamplerAddressMode::mirrored_repeat:
+        return "mirrored_repeat";
+    case SamplerAddressMode::clamp_to_border:
+        return "clamp_to_border";
+    }
+
+    return "unknown";
+}
+
 }