| 472 |
|
// Setup partial blitter (use 64-pixel wide chunks) |
| 473 |
|
const int n_pixels = 64; |
| 474 |
|
const int n_chunks = VIDEO_MODE_X / n_pixels; |
| 475 |
+ |
const int n_pixels_left = VIDEO_MODE_X - (n_chunks * n_pixels); |
| 476 |
|
const int src_chunk_size = src_bytes_per_row / n_chunks; |
| 477 |
|
const int dst_chunk_size = dst_bytes_per_row / n_chunks; |
| 478 |
|
const int src_chunk_size_left = src_bytes_per_row - (n_chunks * src_chunk_size); |
| 504 |
|
// Update the_host_buffer and copy of the_buffer, one line at a time |
| 505 |
|
int i1 = y1 * src_bytes_per_row; |
| 506 |
|
int i2 = y1 * scr_bytes_per_row; |
| 507 |
+ |
#ifdef USE_SDL_VIDEO |
| 508 |
+ |
int bbi = 0; |
| 509 |
+ |
SDL_Rect bb[3] = { |
| 510 |
+ |
{ VIDEO_MODE_X, y1, 0, 0 }, |
| 511 |
+ |
{ VIDEO_MODE_X, -1, 0, 0 }, |
| 512 |
+ |
{ VIDEO_MODE_X, -1, 0, 0 } |
| 513 |
+ |
}; |
| 514 |
+ |
#endif |
| 515 |
|
VIDEO_DRV_LOCK_PIXELS; |
| 516 |
|
for (int j = y1; j <= y2; j++) { |
| 517 |
|
for (int i = 0; i < n_chunks; i++) { |
| 519 |
|
memcpy(the_buffer_copy + i1, the_buffer + i1, src_chunk_size); |
| 520 |
|
Screen_blit(the_host_buffer + i2, the_buffer + i1, src_chunk_size); |
| 521 |
|
#ifdef USE_SDL_VIDEO |
| 522 |
< |
SDL_UpdateRect(drv->s, i * n_pixels, j, n_pixels, 1); |
| 522 |
> |
const int x = i * n_pixels; |
| 523 |
> |
if (x < bb[bbi].x) { |
| 524 |
> |
if (bb[bbi].w) |
| 525 |
> |
bb[bbi].w += bb[bbi].x - x; |
| 526 |
> |
else |
| 527 |
> |
bb[bbi].w = n_pixels; |
| 528 |
> |
bb[bbi].x = x; |
| 529 |
> |
} |
| 530 |
> |
else if (x >= bb[bbi].x + bb[bbi].w) |
| 531 |
> |
bb[bbi].w = x + n_pixels - bb[bbi].x; |
| 532 |
|
#endif |
| 533 |
|
} |
| 534 |
|
i1 += src_chunk_size; |
| 541 |
|
} |
| 542 |
|
i1 += src_chunk_size_left; |
| 543 |
|
i2 += dst_chunk_size_left; |
| 544 |
+ |
#ifdef USE_SDL_VIDEO |
| 545 |
+ |
const int x = n_chunks * n_pixels; |
| 546 |
+ |
if (x < bb[bbi].x) { |
| 547 |
+ |
if (bb[bbi].w) |
| 548 |
+ |
bb[bbi].w += bb[bbi].x - x; |
| 549 |
+ |
else |
| 550 |
+ |
bb[bbi].w = n_pixels_left; |
| 551 |
+ |
bb[bbi].x = x; |
| 552 |
+ |
} |
| 553 |
+ |
else if (x >= bb[bbi].x + bb[bbi].w) |
| 554 |
+ |
bb[bbi].w = x + n_pixels_left - bb[bbi].x; |
| 555 |
+ |
#endif |
| 556 |
|
} |
| 557 |
|
i2 += scr_bytes_left; |
| 558 |
+ |
#ifdef USE_SDL_VIDEO |
| 559 |
+ |
bb[bbi].h++; |
| 560 |
+ |
if (bb[bbi].w && (j == y1 || j == y2 - 1 || j == y2)) { |
| 561 |
+ |
bbi++; |
| 562 |
+ |
assert(bbi <= 3); |
| 563 |
+ |
if (j != y2) |
| 564 |
+ |
bb[bbi].y = j + 1; |
| 565 |
+ |
} |
| 566 |
+ |
#endif |
| 567 |
|
} |
| 568 |
+ |
#ifdef USE_SDL_VIDEO |
| 569 |
+ |
SDL_UpdateRects(drv->s, bbi, bb); |
| 570 |
+ |
#endif |
| 571 |
|
VIDEO_DRV_UNLOCK_PIXELS; |
| 572 |
|
} |
| 573 |
|
mainBuffer.dirty = false; |
