diff options
Diffstat (limited to 'src/video')
| -rw-r--r-- | src/video/video_driver.hpp | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/src/video/video_driver.hpp b/src/video/video_driver.hpp index d4e750134..bc445d92d 100644 --- a/src/video/video_driver.hpp +++ b/src/video/video_driver.hpp @@ -13,6 +13,7 @@ #include "../driver.h" #include "../core/geometry_type.hpp" #include "../core/math_func.hpp" +#include "../zoom_type.h" #include <vector> extern std::string _ini_videodriver; @@ -106,6 +107,18 @@ public: virtual void EditBoxGainedFocus() {} /** + * Get a suggested default GUI zoom taking screen DPI into account. + */ + virtual ZoomLevel GetSuggestedUIZoom() + { + float dpi_scale = this->GetDPIScale(); + + if (dpi_scale >= 3.0f) return ZOOM_LVL_NORMAL; + if (dpi_scale >= 1.5f) return ZOOM_LVL_OUT_2X; + return ZOOM_LVL_OUT_4X; + } + + /** * Get the currently active instance of the video driver. */ static VideoDriver *GetInstance() { @@ -113,12 +126,18 @@ public: } protected: - /* + /** * Get the resolution of the main screen. */ virtual Dimension GetScreenSize() const { return { DEFAULT_WINDOW_WIDTH, DEFAULT_WINDOW_HEIGHT }; } /** + * Get DPI scaling factor of the screen OTTD is displayed on. + * @return 1.0 for default platform DPI, > 1.0 for higher DPI values, and < 1.0 for smaller DPI values. + */ + virtual float GetDPIScale() { return 1.0f; } + + /** * Apply resolution auto-detection and clamp to sensible defaults. */ void UpdateAutoResolution() |