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ReC98
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[Decompilation] Add an inline function for VRAM offset calculation 

Which actually does inline… in C++, because Turbo C++ doesn't support
the `inline` keyword in C mode. So much for the superiority of that
language, even in 1994…

Part of P0083, funded by Yanga.
This commit is contained in:
nmlgc 2020-03-15 20:11:55 +01:00
parent 2546c5dfcb
commit df6b636053
2 changed files with 9 additions and 2 deletions
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7
ReC98.h
View File

@ -116,6 +116,13 @@ extern dots8_t *VRAM_PLANE_E;
#define VRAM_OFFSET(x, y) ((x) >> 3) + (y << 6) + (y << 4)
#ifdef __cplusplus
static inline unsigned int vram_offset_shift(int x, int y)
{
return VRAM_OFFSET(x, y);
}
#endif
#define VRAM_CHUNK(plane, offset, bit_count) \
*(dots##bit_count##_t *)(VRAM_PLANE_##plane + offset)

4
th01/hardware/graph.cpp
View File

@ -462,7 +462,7 @@ void graph_r_vline(int x, int top, int bottom, int col)
egc_copy_rect_1_to_0(x, top, sizeof(pattern) * 8, bottom - top);
return;
}
vram_row_offset = VRAM_OFFSET(x, top);
vram_row_offset = vram_offset_shift(x, top);
pattern = graph_r_pattern >> (x & 7);
pattern |= graph_r_pattern << (16 - (x & 7));
@ -611,7 +611,7 @@ void graph_r_line(int left, int top, int right, int bottom, int col)
plot_loop(y_cur, h, y_direction, x_cur, w, 1);
}
restore_last:
vram_offset = VRAM_OFFSET(x_cur, y_cur) - 1;
vram_offset = vram_offset_shift(x_cur, y_cur) - 1;
restore_at(vram_offset);
end:
if(!graph_r_restore_from_1) {