ReC98/th01/hardware/scrollup.hpp

// Waits until VSync, then sets the GDC's hardware scroll registers so that
// the given line will appear at the top of the screen for all subsequent
// frames.
void z_vsync_wait_and_scrollup(vram_y_t line_on_top);
[Decompilation] [th01] GDC-powered graphics layer scrolling Surprise, it's the (terribly suboptimal) setgsta() example function from the PC-9801 Programmers' Bible! 100% identical, so ZUN must have read that book as well. Used for screen shaking effects, as well as the scrolling backgrounds at the start of the Final Boss stages. Completes P0095, funded by Yanga. 2020-05-31 12:36:10 +00:00			`// Waits until VSync, then sets the GDC's hardware scroll registers so that`
			`// the given line will appear at the top of the screen for all subsequent`
			`// frames.`
[Maintenance] Declare distinct types for screen, VRAM, and TRAM coordinates Whew, time to look at every `int` variable we ever declared! The best moment to do this would have been a year ago, but well, better late than never. No need to communicate that in comments anymore. These shouldn't be used for widths, heights, or sprite-space coordinates. Maybe we'll cover that another time, this commit is already large enough. Part of P0111, funded by [Anonymous] and Blue Bolt. 2020-08-20 19:59:45 +00:00			`void z_vsync_wait_and_scrollup(vram_y_t line_on_top);`