Add renderer blit command contract

src/renderer_api/renderer_api.cpp

@@ -241,6 +241,40 @@ pp::foundation::Result<std::uint64_t> frame_capture_byte_size(TextureDesc desc)
     return texture_byte_size(desc);
 }
 
+pp::foundation::Status validate_blit_filter(BlitFilter filter) noexcept
+{
+    switch (filter) {
+    case BlitFilter::nearest:
+    case BlitFilter::linear:
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("blit filter is not supported");
+}
+
+pp::foundation::Status validate_blit_descs(TextureDesc source, TextureDesc destination) noexcept
+{
+    if (!source.render_target || !destination.render_target) {
+        return pp::foundation::Status::invalid_argument("blit endpoints must be render targets");
+    }
+
+    if (source.format != destination.format) {
+        return pp::foundation::Status::invalid_argument("blit endpoints must use matching texture formats");
+    }
+
+    const auto source_status = texture_byte_size(source);
+    if (!source_status.ok()) {
+        return source_status.status();
+    }
+
+    const auto destination_status = texture_byte_size(destination);
+    if (!destination_status.ok()) {
+        return destination_status.status();
+    }
+
+    return pp::foundation::Status::success();
+}
+
 const char* texture_format_name(TextureFormat format) noexcept
 {
     switch (format) {
@@ -269,4 +303,16 @@ const char* primitive_topology_name(PrimitiveTopology topology) noexcept
     return "unknown";
 }
 
+const char* blit_filter_name(BlitFilter filter) noexcept
+{
+    switch (filter) {
+    case BlitFilter::nearest:
+        return "nearest";
+    case BlitFilter::linear:
+        return "linear";
+    }
+
+    return "unknown";
+}
+
 }