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ReC98/th03/formats/pi.h

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[Maintenance] Clean up PI function declarations and comments
2019-12-15 19:17:00 +00:00
#include "th02/formats/pi.h"
[Reverse-engineering] [th05] Masked PI display As used for the title screen fade-in effect. Another function that apparently was deliberately written to run not that fast, by blitting each row individually to the 400th VRAM row just so that it can then turn on the EGC, perform the *actual* masked blit to the VRAM destination, and then turn the EGC off before moving to the next now. The same effect could have entirely been accomplished by copying graph_pack_put_8() and applying the mask there; it's not like ZUN didn't know how to modify master.lib… (See also 44ad3eb4) --Nmlgc
2019-12-10 07:52:24 +00:00
#define PI_MASK_COUNT 4
#define PI_MASK_H 4
[Maintenance] Use `dots` for 1bpp lines, and `planar` for B/R/G/E dot structs I tried `brge` for the latter, but that had *the* most horrible ergonomics, and I misspelled it as `bgre` 100% of the times I typed it manually. Turns out that `dots` is also consistent with master.lib's naming scheme, leaving `planar` to *actually* refer to types storing multiple planes worth of pixels. These types are showing up more and more, and deserve something better than their previous long-winded and misleading name. Part of P0081, funded by Ember2528.
2020-03-06 23:25:03 +00:00
extern const dots16_t PI_MASKS[PI_MASK_COUNT][PI_MASK_H];
[Reverse-engineering] [th05] Masked PI display As used for the title screen fade-in effect. Another function that apparently was deliberately written to run not that fast, by blitting each row individually to the 400th VRAM row just so that it can then turn on the EGC, perform the *actual* masked blit to the VRAM destination, and then turn the EGC off before moving to the next now. The same effect could have entirely been accomplished by copying graph_pack_put_8() and applying the mask there; it's not like ZUN didn't know how to modify master.lib… (See also 44ad3eb4) --Nmlgc
2019-12-10 07:52:24 +00:00
[Maintenance] Indicate byte alignment for all .PI blitting functions Part of P0124, funded by [Anonymous] and Blue Bolt.
2020-10-23 17:27:10 +00:00
// Like pi_put_8(), but only displays every second row in the given PI.
int pascal pi_put_interlace_8(screen_x_t left, vram_y_t top, int slot);
[Maintenance] Clean up PI function declarations and comments
2019-12-15 19:17:00 +00:00
[Maintenance] Indicate byte alignment for all .PI blitting functions Part of P0124, funded by [Anonymous] and Blue Bolt.
2020-10-23 17:27:10 +00:00
// Like pi_put_8(), but only displays the n-th 320x200 [quarter], counted
[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
// from the top left, of the PI image in slot #[slot] at ([left], [top]).
[Decompilation] [th03/th04] pi_put_quarter_8() Part of P0132, funded by [Anonymous].
2020-12-25 15:53:32 +00:00
void pascal pi_put_quarter_8(
[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
screen_x_t left, vram_y_t top, int slot, int quarter
);
[Decompilation] [th03/th04] pi_put_quarter_8() Part of P0132, funded by [Anonymous].
2020-12-25 15:53:32 +00:00
static const pixel_t PI_QUARTER_W = (PI_W / 2);
static const pixel_t PI_QUARTER_H = (PI_H / 2);