diff options
Diffstat (limited to 'src/gui/Utils.cpp')
| -rw-r--r-- | src/gui/Utils.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/gui/Utils.cpp b/src/gui/Utils.cpp index e000b7a..d1643f2 100644 --- a/src/gui/Utils.cpp +++ b/src/gui/Utils.cpp @@ -50,4 +50,21 @@ namespace gsr { void set_frame_delta_seconds(double frame_delta) { frame_delta_seconds = frame_delta; } + + mgl::vec2f scale_keep_aspect_ratio(mgl::vec2f from, mgl::vec2f to) { + if(std::abs(from.x) <= 0.0001f || std::abs(from.y) <= 0.0001f) + return {0.0f, 0.0f}; + + const double height_to_width_ratio = (double)from.y / (double)from.x; + from.x = to.x; + from.y = from.x * height_to_width_ratio; + + if(from.y > to.y) { + const double width_height_ratio = (double)from.x / (double)from.y; + from.y = to.y; + from.x = from.y * width_height_ratio; + } + + return from; + } }
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