add lossy qoi encoding using rdo

external/CMakeLists.txt

@@ -25,6 +25,7 @@ add_subdirectory(./implot)
 add_subdirectory(./stb)
 add_subdirectory(./libwebp)
 add_subdirectory(./qoi)
+add_subdirectory(./libqoirdo)
 add_subdirectory(./sdl_image)
 
 if (TOMATO_BREAKPAD)

external/libqoirdo/CMakeLists.txt

@@ -15,6 +15,8 @@ add_library(qoirdo
 
 target_compile_features(qoirdo PUBLIC cxx_std_11)
 
+target_include_directories(qoirdo SYSTEM INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}")
+
 #if (NOT MSVC)
 #   target_link_libraries(rdopng m pthread)
 #endif()

src/CMakeLists.txt

@@ -208,6 +208,7 @@ target_link_libraries(tomato PUBLIC
 	WebP::webpdemux
 	WebP::libwebpmux # the f why (needed for anim encode)
 	qoi
+	qoirdo
 	SDL3_image::SDL3_image
 )
 

src/chat_gui/send_image_popup.cpp

@@ -473,12 +473,12 @@ void SendImagePopup::render(float time_delta) {
 
 	if (compress) {
 		ImGui::SameLine();
-		ImGui::Combo("##compression_type", &current_compressor, "webp\0webp lossless\0jpeg\0png\0qoi\0");
+		ImGui::Combo("##compression_type", &current_compressor, "webp\0webp lossless\0jpeg\0png\0qoi\0qoi lossy\0");
 
 		ImGui::Indent();
 		// combo "webp""webp-lossless""png""jpg?"
 		// if lossy quality slider (1-100) default 80
-		if (current_compressor == 0 || current_compressor == 2) {
+		if (current_compressor == 0 || current_compressor == 2 || current_compressor == 5) {
 			const uint32_t qmin = 1;
 			const uint32_t qmax = 100;
 			recalc_size |= ImGui::SliderScalar("quality", ImGuiDataType_U32, &quality, &qmin, &qmax);
@@ -534,17 +534,22 @@ void SendImagePopup::render(float time_delta) {
 					_on_send(new_data, ".webp");
 				}
 			} else if (current_compressor == 2) {
-				new_data = ImageEncoderSTBJpeg{}.encodeToMemoryRGBA(tmp_img, {{"quality", quality}});;
+				new_data = ImageEncoderSTBJpeg{}.encodeToMemoryRGBA(tmp_img, {{"quality", quality}});
 				if (!new_data.empty()) {
 					_on_send(new_data, ".jpg");
 				}
 			} else if (current_compressor == 3) {
-				new_data = ImageEncoderSTBPNG{}.encodeToMemoryRGBA(tmp_img, {{"png_compression_level", compression_level}});;
+				new_data = ImageEncoderSTBPNG{}.encodeToMemoryRGBA(tmp_img, {{"png_compression_level", compression_level}});
 				if (!new_data.empty()) {
 					_on_send(new_data, ".png");
 				}
 			} else if (current_compressor == 4) {
-				new_data = ImageEncoderQOI{}.encodeToMemoryRGBA(tmp_img, {});;
+				new_data = ImageEncoderQOI{}.encodeToMemoryRGBA(tmp_img, {});
+				if (!new_data.empty()) {
+					_on_send(new_data, ".qoi");
+				}
+			} else if (current_compressor == 5) {
+				new_data = ImageEncoderQOI{}.encodeToMemoryRGBA(tmp_img, {{"quality", quality}});
 				if (!new_data.empty()) {
 					_on_send(new_data, ".qoi");
 				}

src/image_loader_qoi.cpp

@@ -1,8 +1,10 @@
 #include "./image_loader_qoi.hpp"
 
 #include <qoi/qoi.h>
+#include <qoirdo.hpp>
 
 #include <cstdint>
+#include <mutex>
 #include <cassert>
 
 #include <iostream>
@@ -131,7 +133,7 @@ ImageLoaderQOI::ImageResult ImageLoaderQOI::loadFromMemoryRGBA(const uint8_t* da
 	return res;
 }
 
-std::vector<uint8_t> ImageEncoderQOI::encodeToMemoryRGBA(const ImageResult& input_image, const std::map<std::string, float>&) {
+std::vector<uint8_t> ImageEncoderQOI::encodeToMemoryRGBA(const ImageResult& input_image, const std::map<std::string, float>& extra_options) {
 	if (input_image.frames.empty()) {
 		std::cerr << "IEQOI error: empty image\n";
 		return {};
@@ -143,13 +145,21 @@ std::vector<uint8_t> ImageEncoderQOI::encodeToMemoryRGBA(const ImageResult& inpu
 		//png_compression_level = extra_options.at("png_compression_level");
 	//}
 
+	bool lossless = true;
+	int quality = 90;
+	if (extra_options.count("quality")) {
+		lossless = false;
+		quality = extra_options.at("quality");
+	}
+
+	std::vector<uint8_t> new_data;
+	if (lossless) {
 		qoi_desc desc;
 		desc.width = input_image.width;
 		desc.height = input_image.height;
 		desc.channels = 4;
 		desc.colorspace = QOI_SRGB; // TODO: decide
 
-	std::vector<uint8_t> new_data;
 		for (const auto& frame : input_image.frames) {
 			int out_len {0};
 			uint8_t* enc_data = static_cast<uint8_t*>(qoi_encode(
@@ -172,6 +182,41 @@ std::vector<uint8_t> ImageEncoderQOI::encodeToMemoryRGBA(const ImageResult& inpu
 
 			free(enc_data); // TODO: a streaming encoder would be better
 		}
+	} else { // rdo
+		// current rdo is not thread safe
+		static std::mutex rdo_mutex{};
+		std::lock_guard lg{rdo_mutex};
+		init_qoi_rdo();
+
+		// TODO: merge with qoi?
+		qoi_rdo_desc desc;
+		desc.width = input_image.width;
+		desc.height = input_image.height;
+		desc.channels = 4;
+		desc.colorspace = QOI_SRGB; // TODO: decide
+
+		for (const auto& frame : input_image.frames) {
+			auto enc_data = encode_qoi_rdo_simple(
+				frame.data.data(),
+				desc,
+				quality
+			);
+
+			if (enc_data.empty()) {
+				std::cerr << "IEQOI error: encode_qoi_rdo_simple failed!\n";
+				break;
+			}
+
+			// qoi_pipe like animation support. simple concatination of images
+			if (new_data.empty()) {
+				new_data = enc_data;
+			} else {
+				new_data.insert(new_data.cend(), enc_data.cbegin(), enc_data.cend());
+			}
+		}
+
+		quit_qoi_rdo();
+	}
 
 	return new_data;
 }