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gfx_scroll_v: колоночный accel-проход без буфера-посредника + тест scroll

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Вертикальный скролл перестал ходить через строку-буфер на стеке: колонку
читаем с Port_Y=ys, пишем с Port_Y=yd, а STOP между read- и write-триггером
делает промежуточный OUT Port_Y безопасным.  Один проход вместо
grab→blit-через-буфер.

Справочник libc приведён в соответствие (там же строка про новую точку
входа cbl_open_silence).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Alexander Petrov
2026-08-20 21:59:28 +03:00
parent 3ea4546656
commit e2730f78e0
5 changed files with 287 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libbgi/common/gfx_scroll_v.c
+68 -11
View File
@@ -24,20 +24,72 @@
#include "../_bgi.h"
void gfx_scroll_v(const gfx_rect_t *area, int16_t dy, gfx_rect_t *dirty) {
#ifdef GFX_NOCHECK
uint8_t saved = gfx_get_bank();
uint16_t ady = (dy < 0) ? (uint16_t)(-dy) : (uint16_t)dy;
uint8_t ys = (uint8_t)(area->y + ((dy < 0) ? ady : 0));
uint8_t yd = (uint8_t)(area->y + ((dy > 0) ? ady : 0));
uint16_t hb = area->h - ady;
uint8_t saved = gfx_get_bank();
uint16_t ady = (dy < 0) ? (uint16_t)(-dy) : (uint16_t)dy;
if (hb) {
uint8_t hblk = (uint8_t)hb;
uint16_t w = area->w;
uint16_t src = _gfx_addr_shadow_base + area->x;
uint16_t dst = _gfx_addr_base + area->x;
gfx_set_bank(GFX_BANK_NORMAL);
_bgi_begin();
while (w) {
uint8_t cw = (w > 255) ? 255 : (uint8_t)w;
_bgi_scroll_cols_raw(src, dst, cw, hblk, ys, yd);
src += cw; dst += cw; w -= cw;
}
_bgi_end();
gfx_set_bank(saved);
}
if (dirty) {
dirty->x = area->x;
dirty->y = (dy >= 0) ? area->y : (int16_t)(area->y + area->h - ady);
dirty->w = area->w; dirty->h = ady;
}
#else
int16_t x, y;
uint16_t aw, ah, cut, ady, hb;
uint8_t saved, ys, yd;
if (!area) return;
x = area->x; y = area->y; aw = area->w; ah = area->h;
if (!aw || !ah) goto empty;
if (x < 0) {
cut = (uint16_t)(-x);
if (cut >= aw) goto empty;
aw -= cut; x = 0;
}
if (y < 0) {
cut = (uint16_t)(-y);
if (cut >= ah) goto empty;
ah -= cut; y = 0;
}
if (x >= GFX_WIDTH || y >= GFX_HEIGHT) goto empty;
if (aw > (uint16_t)(GFX_WIDTH - x)) aw = (uint16_t)(GFX_WIDTH - x);
if (ah > (uint16_t)(GFX_HEIGHT - y)) ah = (uint16_t)(GFX_HEIGHT - y);
if (dy >= (int16_t)ah || dy <= -(int16_t)ah) {
if (dirty) { dirty->x=x; dirty->y=y; dirty->w=aw; dirty->h=ah; }
return;
}
ady = (dy < 0) ? (uint16_t)(-dy) : (uint16_t)dy;
saved = gfx_get_bank();
/* Строку чтения (ys) сдвигаем вниз на |dy| при сдвиге вверх, строку
* записи (yd) — вниз на dy при сдвиге вниз; края в пределах area. */
uint8_t ys = (uint8_t)(area->y + ((dy < 0) ? ady : 0));
uint8_t yd = (uint8_t)(area->y + ((dy > 0) ? ady : 0));
uint16_t hb = area->h - ady; /* строк к переносу (≤256) */
ys = (uint8_t)(y + ((dy < 0) ? ady : 0));
yd = (uint8_t)(y + ((dy > 0) ? ady : 0));
hb = ah - ady;
if (hb) { /* 0 = переносить нечего */
uint8_t hblk = (uint8_t)hb; /* размер accel-блока: 256 => 0 */
uint16_t w = area->w;
uint16_t src = _gfx_addr_shadow_base + area->x;
uint16_t dst = _gfx_addr_base + area->x;
uint16_t w = aw;
uint16_t src = _gfx_addr_shadow_base + (uint16_t)x;
uint16_t dst = _gfx_addr_base + (uint16_t)x;
gfx_set_bank(GFX_BANK_NORMAL);
_bgi_begin();
@@ -55,9 +107,14 @@ void gfx_scroll_v(const gfx_rect_t *area, int16_t dy, gfx_rect_t *dirty) {
}
if (dirty) {
dirty->x = area->x;
dirty->y = (dy >= 0) ? area->y : (int16_t)(area->y + area->h - ady);
dirty->w = area->w;
dirty->x = x;
dirty->y = (dy >= 0) ? y : (int16_t)(y + ah - ady);
dirty->w = aw;
dirty->h = ady;
}
return;
empty:
if (dirty) { dirty->x=0; dirty->y=0; dirty->w=0; dirty->h=0; }
#endif
}