Correctly scale images and video to window size

1 files changed, 38 insertions, 0 deletions

diff --git a/src/Scale.cpp b/src/Scale.cpp
new file mode 100644
index 0000000..ab7ea2e
--- /dev/null
+++ b/src/Scale.cpp
@@ -0,0 +1,38 @@
+#include "../include/Scale.hpp"
+
+namespace QuickMedia {
+    static sf::Vector2f wrap_to_size_x(const sf::Vector2f &size, const sf::Vector2f &clamp_size) {
+        sf::Vector2f new_size;
+        auto size_ratio = size.y / size.x;
+        new_size.x = clamp_size.x;
+        new_size.y = new_size.x * size_ratio;
+        return new_size;
+    }
+
+    static sf::Vector2f wrap_to_size_y(const sf::Vector2f &size, const sf::Vector2f &clamp_size) {
+        sf::Vector2f new_size;
+        auto size_ratio = size.x / size.y;
+        new_size.y = clamp_size.y;
+        new_size.x = new_size.y * size_ratio;
+        return new_size;
+    }
+
+    sf::Vector2f wrap_to_size(const sf::Vector2f &size, const sf::Vector2f &clamp_size) {
+        sf::Vector2f new_size;
+        new_size = wrap_to_size_x(size, clamp_size);
+        if(new_size.y > clamp_size.y)
+            new_size = wrap_to_size_y(size, clamp_size);
+        return new_size;
+    }
+
+    sf::Vector2f clamp_to_size(const sf::Vector2f &size, const sf::Vector2f &clamp_size) {
+        sf::Vector2f new_size = size;
+        if(size.x > clamp_size.x || size.y > clamp_size.y)
+            new_size = wrap_to_size(new_size, clamp_size);
+        return new_size;
+    }
+
+    sf::Vector2f get_ratio(const sf::Vector2f &original_size, const sf::Vector2f &new_size) {
+        return sf::Vector2f(new_size.x / original_size.x, new_size.y / original_size.y);
+    }
+}
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