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ReC98/th01/hardware/ptrans_d.cpp

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[Maintenance] Add a 1bpp rectangle template, for custom per-row types This gets rid of a couple of per-entity sprite bitplane types, makes sprite declarations easier to read by putting width and height next to each other… and points out a number of array dimension mistakes -.- Even in places where we can't use it. Part of P0138, funded by [Anonymous] and Blue Bolt.
2021-04-17 18:08:30 +00:00
#include "th01/sprites/ileave_m.hpp"
[Decompilation] [th01] VRAM page transition via interleaving 8×8 squares Used for the blocky transition to Sariel's first and second phases. Completes P0121, funded by Yanga.
2020-09-27 21:43:45 +00:00
#include "th01/hardware/palette.h"
#include "th01/hardware/ptrans.hpp"
[Decompilation] [th01] Interleaving both VRAM pages in an 8×8 square Some of the unused interleave masks are not that straightforward, so it makes sense to have all of them as a bitmap. I'm positive that this sort of thing could have been EGC-accelerated… although, simply writing better C would probably already go a long way. Part of P0121, funded by Yanga.
2020-09-27 19:45:32 +00:00
// Combines the pixels from both VRAM pages in the 8×8 square starting at
// (⌊left/8⌋*8, top), using one of the interlace masks. The resulting square
// is blitted to VRAM page 0.
void graph_interleave_pages_8x8_8(screen_x_t left, vram_y_t top, int mask_id)
{
const interleave_masks_t masks = sINTERLEAVE_MASKS;
vram_offset_t vram_offset = vram_offset_divmul(left, top);
dots8_t dots;
[Maintenance] Add a 1bpp rectangle template, for custom per-row types This gets rid of a couple of per-entity sprite bitplane types, makes sprite declarations easier to read by putting width and height next to each other… and points out a number of array dimension mistakes -.- Even in places where we can't use it. Part of P0138, funded by [Anonymous] and Blue Bolt.
2021-04-17 18:08:30 +00:00
for(char y = 0; y < INTERLEAVE_H; y++) {
[Decompilation] [th01] Interleaving both VRAM pages in an 8×8 square Some of the unused interleave masks are not that straightforward, so it makes sense to have all of them as a bitmap. I'm positive that this sort of thing could have been EGC-accelerated… although, simply writing better C would probably already go a long way. Part of P0121, funded by Yanga.
2020-09-27 19:45:32 +00:00
#define mask masks.dots[mask_id][y]
#define snap(plane, vram_offset) \
VRAM_CHUNK(plane, vram_offset, 8)
#define interleave(plane, vram_offset) \
graph_accesspage_func(1); dots = ~mask & snap(plane, vram_offset); \
graph_accesspage_func(0); dots |= mask & snap(plane, vram_offset); \
graph_accesspage_func(0); VRAM_PUT(plane, vram_offset, dots, 8);
interleave(B, vram_offset);
interleave(R, vram_offset);
interleave(G, vram_offset);
interleave(E, vram_offset);
vram_offset += ROW_SIZE;
#undef interleave
#undef snap
#undef mask
}
}
[Decompilation] [th01] VRAM page transition via interleaving 8×8 squares Used for the blocky transition to Sariel's first and second phases. Completes P0121, funded by Yanga.
2020-09-27 21:43:45 +00:00
void pagetrans_diagonal_8x8(unsigned int step_ms)
{
pagetrans_diagonal_8x8_with_palette(step_ms, z_Palettes, z_Palettes);
}
static const int FRAME_COUNT = (
(RES_X / INTERLEAVE_W) + (RES_Y / INTERLEAVE_H)
);
void pagetrans_diagonal_8x8_with_palette(
[Maintenance] Only use the `far` keyword to declare intent Part of P0134, funded by [Anonymous].
2021-02-04 19:16:03 +00:00
unsigned int step_ms, Palette4 &pal_cur, const Palette4 &pal_target
[Decompilation] [th01] VRAM page transition via interleaving 8×8 squares Used for the blocky transition to Sariel's first and second phases. Completes P0121, funded by Yanga.
2020-09-27 21:43:45 +00:00
)
{
int comp;
int col;
screen_x_t from_topleft_left = 0;
vram_y_t from_topleft_top = 0;
screen_x_t from_bottomright_left = (RES_X - INTERLEAVE_W);
vram_y_t from_bottomright_top = (RES_Y - INTERLEAVE_H);
screen_x_t tip_left;
vram_y_t tip_top;
for(int frame = 0; frame < FRAME_COUNT; frame++) {
tip_left = from_topleft_left;
tip_top = from_topleft_top;
while((from_topleft_left >= 0) && (from_topleft_top <= (RES_Y - 1))) {
graph_interleave_pages_8x8_8(
from_topleft_left, from_topleft_top, 1
);
from_topleft_left -= INTERLEAVE_W;
from_topleft_top += INTERLEAVE_H;
}
from_topleft_left = (tip_left < (RES_X - INTERLEAVE_W))
? (tip_left + INTERLEAVE_W)
: tip_left;
from_topleft_top = (tip_left < (RES_X - INTERLEAVE_W))
? 0
: (tip_top + INTERLEAVE_H);
if((frame % (FRAME_COUNT / COLOR_COUNT)) == 0) {
[Decompilation] Move palette loops to common macros You'd really want to overload `operator =` for those. Part of P0165, funded by Ember2528.
2021-10-30 23:11:05 +00:00
// Not identical to the ramping loop in z_palette_fade_from()!
palette_foreach(col, comp, {
if(pal_cur[col].v[comp] != pal_target[col].v[comp]) {
pal_cur.colors[col].v[comp] +=
(pal_cur[col].v[comp] > pal_target[col].v[comp])
? -1
: 1;
[Decompilation] [th01] VRAM page transition via interleaving 8×8 squares Used for the blocky transition to Sariel's first and second phases. Completes P0121, funded by Yanga.
2020-09-27 21:43:45 +00:00
}
[Decompilation] Move palette loops to common macros You'd really want to overload `operator =` for those. Part of P0165, funded by Ember2528.
2021-10-30 23:11:05 +00:00
});
[Decompilation] [th01] VRAM page transition via interleaving 8×8 squares Used for the blocky transition to Sariel's first and second phases. Completes P0121, funded by Yanga.
2020-09-27 21:43:45 +00:00
z_palette_set_all_show(pal_cur);
}
tip_left = from_bottomright_left;
tip_top = from_bottomright_top;
while(
(from_bottomright_left >= 0) &&
(from_bottomright_top <= (RES_Y - 1))
) {
graph_interleave_pages_8x8_8(
from_bottomright_left, from_bottomright_top, 2
);
from_bottomright_left -= INTERLEAVE_W;
from_bottomright_top += INTERLEAVE_H;
}
from_bottomright_left = (tip_top > 0)
? (RES_X - INTERLEAVE_W)
: (tip_left - INTERLEAVE_W);
from_bottomright_top = (tip_top > 0)
? (tip_top - INTERLEAVE_H)
: tip_top;
delay(step_ms);
}
}