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Feature: Variable GUI scale.

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GUI scale is now variable from 100% to 500%, and no longer restricted to
powers-of-2.
This commit is contained in:
Peter Nelson
2021-04-20 11:49:20 +01:00
committed by PeterN
parent 13d271217f
commit 9666e46739
22 changed files with 175 additions and 205 deletions
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59
src/gfx.cpp
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@@ -61,12 +61,9 @@ static void GfxMainBlitter(const Sprite *sprite, int x, int y, BlitterMode mode,
static ReusableBuffer<uint8> _cursor_backup;
ZoomLevel _gui_zoom; ///< GUI Zoom level
ZoomLevel _font_zoom; ///< Font Zoom level
int8 _gui_zoom_cfg; ///< GUI zoom level in config.
int8 _font_zoom_cfg; ///< Font zoom level in config.
ZoomLevel _gui_zoom = ZOOM_LVL_OUT_4X; ///< GUI Zoom level
int _gui_scale = MIN_INTERFACE_SCALE; ///< GUI scale, 100 is 100%.
int _gui_scale_cfg; ///< GUI scale in config.
/**
* The rect for repaint.
@@ -2028,48 +2025,52 @@ void SortResolutions()
void UpdateGUIZoom()
{
/* Determine real GUI zoom to use. */
if (_gui_zoom_cfg == ZOOM_LVL_CFG_AUTO) {
_gui_zoom = static_cast<ZoomLevel>(Clamp(VideoDriver::GetInstance()->GetSuggestedUIZoom(), _settings_client.gui.zoom_min, _settings_client.gui.zoom_max));
if (_gui_scale_cfg == -1) {
_gui_scale = VideoDriver::GetInstance()->GetSuggestedUIScale();
} else {
/* Ensure the gui_zoom is clamped between min/max. Change the
* _gui_zoom_cfg if it isn't, as this is used to visually show the
* selection in the Game Options. */
_gui_zoom_cfg = Clamp(_gui_zoom_cfg, _settings_client.gui.zoom_min, _settings_client.gui.zoom_max);
_gui_zoom = static_cast<ZoomLevel>(_gui_zoom_cfg);
_gui_scale = Clamp(_gui_scale_cfg, MIN_INTERFACE_SCALE, MAX_INTERFACE_SCALE);
}
/* Determine real font zoom to use. */
if (_font_zoom_cfg == ZOOM_LVL_CFG_AUTO) {
_font_zoom = static_cast<ZoomLevel>(VideoDriver::GetInstance()->GetSuggestedUIZoom());
} else {
_font_zoom = static_cast<ZoomLevel>(_font_zoom_cfg);
}
int8 new_zoom = ScaleGUITrad(1) <= 1 ? ZOOM_LVL_OUT_4X : ScaleGUITrad(1) >= 4 ? ZOOM_LVL_MIN : ZOOM_LVL_OUT_2X;
/* Ensure the gui_zoom is clamped between min/max. */
new_zoom = Clamp(new_zoom, _settings_client.gui.zoom_min, _settings_client.gui.zoom_max);
_gui_zoom = static_cast<ZoomLevel>(new_zoom);
}
/**
* Resolve GUI zoom level and adjust GUI to new zoom, if auto-suggestion is requested.
* @param automatic Set if the change is occuring due to OS DPI scaling being changed.
* @returns true when the zoom level has changed, caller must call ReInitAllWindows(true)
* after resizing the application's window/buffer.
*/
bool AdjustGUIZoom()
bool AdjustGUIZoom(bool automatic)
{
auto old_zoom = _gui_zoom;
ZoomLevel old_zoom = _gui_zoom;
int old_scale = _gui_scale;
UpdateGUIZoom();
if (old_zoom == _gui_zoom) return false;
GfxClearSpriteCache();
VideoDriver::GetInstance()->ClearSystemSprites();
if (old_scale == _gui_scale) return false;
/* Reload sprites if sprite zoom level has changed. */
if (old_zoom != _gui_zoom) {
GfxClearSpriteCache();
VideoDriver::GetInstance()->ClearSystemSprites();
UpdateCursorSize();
}
ClearFontCache();
GfxClearSpriteCache();
LoadStringWidthTable();
UpdateAllVirtCoords();
/* Adjust all window sizes to match the new zoom level, so that they don't appear
to move around when the application is moved to a screen with different DPI. */
auto zoom_shift = old_zoom - _gui_zoom;
for (Window *w : Window::Iterate()) {
w->left = AdjustByZoom(w->left, zoom_shift);
w->top = AdjustByZoom(w->top, zoom_shift);
w->width = AdjustByZoom(w->width, zoom_shift);
w->height = AdjustByZoom(w->height, zoom_shift);
if (automatic) {
w->left = (w->left * _gui_scale) / old_scale;
w->top = (w->top * _gui_scale) / old_scale;
w->width = (w->width * _gui_scale) / old_scale;
w->height = (w->height * _gui_scale) / old_scale;
}
if (w->viewport != nullptr) {
w->viewport->zoom = Clamp(ZoomLevel(w->viewport->zoom - zoom_shift), _settings_client.gui.zoom_min, _settings_client.gui.zoom_max);
}