fix taking as copy instead of ref

major cause for temporary allocations

src/chat_gui4.cpp

@@ -668,7 +668,7 @@ float ChatGui4::render(float time_delta) {
 									// TODO: dedup?
 									ImGui::TextDisabled("_");
 								} else {
-									const auto list = msg_reg.get<Message::Components::ReceivedBy>(e).ts;
+									const auto& list = msg_reg.get<Message::Components::ReceivedBy>(e).ts;
 									// wrongly assumes contacts never get removed from a group
 									if (sub_contacts != nullptr && list.size() < sub_contacts->size()) {
 										// if partically delivered
@@ -915,7 +915,6 @@ float ChatGui4::render(float time_delta) {
 						);
 					}
 
-					{
 					// TODO: add support for more than images
 					// !!! polling each frame can be VERY expensive !!!
 					//const auto* mime_type = clipboardHasImage();
@@ -926,7 +925,6 @@ float ChatGui4::render(float time_delta) {
 						} else if (const auto* fpmt = clipboardHasFileList(); fpmt != nullptr) {
 							pasteFile(fpmt);
 						}
-						//} else if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
 					} else if (ImGui::BeginPopupContextItem(nullptr, ImGuiMouseButton_Right)) {
 						// TODO: use list instead
 						const static std::vector<const char*> image_mime_types {
@@ -948,7 +946,6 @@ float ChatGui4::render(float time_delta) {
 					}
 					//ImGui::EndDisabled();
 				}
-				}
 				ImGui::EndChild();
 
 #if 0

src/image_loader_webp.cpp

@@ -104,8 +104,11 @@ std::vector<uint8_t> ImageEncoderWebP::encodeToMemoryRGBA(const ImageResult& inp
 	// Tune 'enc_options' as needed.
 	enc_options.minimize_size = 1; // might be slow? optimize for size, no key-frame insertion
 
-	WebPAnimEncoder* enc = WebPAnimEncoderNew(input_image.width, input_image.height, &enc_options);
-	if (enc == nullptr) {
+	std::unique_ptr<WebPAnimEncoder, decltype(&WebPAnimEncoderDelete)> enc {
+		WebPAnimEncoderNew(input_image.width, input_image.height, &enc_options),
+		&WebPAnimEncoderDelete
+	};
+	if (!enc) {
 		std::cerr << "IEWebP error: WebPAnimEncoderNew()\n";
 		return {};
 	}
@@ -113,10 +116,8 @@ std::vector<uint8_t> ImageEncoderWebP::encodeToMemoryRGBA(const ImageResult& inp
 	int prev_timestamp = 0;
 	for (const auto& frame : input_image.frames) {
 		WebPConfig config;
-		//WebPConfigInit(&config);
 		if (!WebPConfigPreset(&config, WebPPreset::WEBP_PRESET_DEFAULT, quality)) {
 			std::cerr << "IEWebP error: WebPConfigPreset()\n";
-			WebPAnimEncoderDelete(enc);
 			return {};
 		}
 		//WebPConfigLosslessPreset(&config, 6); // 9 for max compression
@@ -124,39 +125,34 @@ std::vector<uint8_t> ImageEncoderWebP::encodeToMemoryRGBA(const ImageResult& inp
 		WebPPicture frame_webp;
 		if (!WebPPictureInit(&frame_webp)) {
 			std::cerr << "IEWebP error: WebPPictureInit()\n";
-			WebPAnimEncoderDelete(enc);
 			return {};
 		}
 		frame_webp.width = input_image.width;
 		frame_webp.height = input_image.height;
 		if (!WebPPictureImportRGBA(&frame_webp, frame.data.data(), 4*input_image.width)) {
 			std::cerr << "IEWebP error: WebPPictureImportRGBA()\n";
-			WebPAnimEncoderDelete(enc);
 			return {};
 		}
 
-		if (!WebPAnimEncoderAdd(enc, &frame_webp, prev_timestamp, &config)) {
+		if (!WebPAnimEncoderAdd(enc.get(), &frame_webp, prev_timestamp, &config)) {
 			std::cerr << "IEWebP error: WebPAnimEncoderAdd()\n";
 			WebPPictureFree(&frame_webp);
-			WebPAnimEncoderDelete(enc);
 			return {};
 		}
 		prev_timestamp += frame.ms;
+		WebPPictureFree(&frame_webp);
 	}
-	if (!WebPAnimEncoderAdd(enc, NULL, prev_timestamp, NULL)) { // tell anim encoder its the end
+	if (!WebPAnimEncoderAdd(enc.get(), NULL, prev_timestamp, NULL)) { // tell anim encoder its the end
 		std::cerr << "IEWebP error: WebPAnimEncoderAdd(NULL)\n";
-		WebPAnimEncoderDelete(enc);
 		return {};
 	}
 
 	WebPData webp_data;
 	WebPDataInit(&webp_data);
-	if (!WebPAnimEncoderAssemble(enc, &webp_data)) {
+	if (!WebPAnimEncoderAssemble(enc.get(), &webp_data)) {
 		std::cerr << "IEWebP error: WebPAnimEncoderAdd(NULL)\n";
-		WebPAnimEncoderDelete(enc);
 		return {};
 	}
-	WebPAnimEncoderDelete(enc);
 
 	// Write the 'webp_data' to a file, or re-mux it further.
 	// TODO: make it not a copy