Allow mirroring of lottie frames.

desktop-app · Sep 16, 2021 · ddeb78f · ddeb78f
1 parent a8ffe6c
commit ddeb78f
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/lottie/lottie_common.h b/lottie/lottie_common.h
@@ -38,6 +38,7 @@ enum class Error {
 struct FrameRequest {
 	QSize box;
 	std::optional<QColor> colored;
+	bool mirrorHorizontal = false;
 
 	[[nodiscard]] bool empty() const {
 		return box.isEmpty();
@@ -46,7 +47,8 @@ struct FrameRequest {
 
 	[[nodiscard]] bool operator==(const FrameRequest &other) const {
 		return (box == other.box)
-			&& (colored == other.colored);
+			&& (colored == other.colored)
+			&& (mirrorHorizontal == other.mirrorHorizontal);
 	}
 	[[nodiscard]] bool operator!=(const FrameRequest &other) const {
 		return !(*this == other);

diff --git a/lottie/lottie_frame_renderer.cpp b/lottie/lottie_frame_renderer.cpp
@@ -85,7 +85,7 @@ class FrameRendererObject final {
 		const FrameRequest &request) {
 	if (request.box.isEmpty()) {
 		return true;
-	} else if (request.colored.has_value()) {
+	} else if (request.colored.has_value() || request.mirrorHorizontal) {
 		return false;
 	}
 	const auto size = image.size();
@@ -112,6 +112,9 @@ class FrameRendererObject final {
 		p.setRenderHint(QPainter::SmoothPixmapTransform);
 		p.drawImage(QRect(QPoint(), size), original);
 	}
+	if (request.mirrorHorizontal) {
+		storage = std::move(storage).mirrored(true, false);
+	}
 	if (request.colored.has_value()) {
 		storage = Images::prepareColored(*request.colored, std::move(storage));
 	}