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2024-03-26Added functions to draw images at sub-pixel positionsThorbjørn Lindeijer1-0/+9
This can be used for smoother mouse cursor movement when rendering our own mouse cursor (already changed in this commit) and is also necessary for implementing support for HiDPI font rendering. Also dropped some almost duplicated OpenGL code.
2024-03-22Added support for scaling the outputThorbjørn Lindeijer1-3/+12
* Added "Scale" user option, which can either by "Auto" or an explicit scaling factor. Its maximum value depends on the current resolution. The "Auto" factor is based on keeping the logical resolution on at least 800x600, wheres the maximum scale is based on keeping the logical resolution on at least 640x480. * Enabled support for High DPI. This means the rendering target can now have a different resolution than the window size, which can happen on macOS, Windows and Wayland. The resulting scale is multiplied by the above user-controlled scale. Currently, this looks ugly for non-integer scales, which are not used on macOS and can only be configured on some Wayland compositors. Has not been tested on Windows. * Simplified OpenGL initialization (moved out of _beginDraw). * Made sure _beginDraw/_endDraw sets a clip area also for SDLGraphics.
2024-02-27Added VSync and windowed fullscreen optionsThorbjørn Lindeijer1-0/+73
The configuration and setup UI were adjusted to the new options. This also fixes issues in applying new video settings. Default resolution was changed from 800x600 to 1280x720. VSync is enabled by default while FPS limit was disabled. Display aspect ratio for the resolution options. I had to work around some macOS issues: * Don't change window size when it appears to be "maximized", since it just changes the rendering area while leaving the window maximized. * Unset fullscreen display mode temporarily to allow changing resolutions, otherwise the rendering area no longer matches the screen and mouse input is also off. * Removed SDL_WINDOW_ALLOW_HIGHDPI for now because it causes issues on macOS, since we're not actually handling the scaling factor. A Video class and an SDLGraphics subclass were split off from Graphics. This setup has Less duplication and leaves the OpenGLGraphics and SDLGraphics better separated. Fixes #57 Fixes #58