mirror of https://github.com/nmlgc/ReC98.git
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
#include "th01/formats/ptn.hpp"
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void ptn_snap_8(screen_x_t left, vram_y_t top, int ptn_id)
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{
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vram_offset_t vram_offset = vram_offset_muldiv(left, top);
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ptn_t *ptn = ptn_with_id(ptn_id);
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for(pixel_t y = 0; y < PTN_H; y++) {
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vram_snap_ptn_planar(ptn, y, vram_offset);
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vram_offset += ROW_SIZE;
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}
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}
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static inline ptn_plane_t::row_dots_t dot_mask(pixel_t x, pixel_t w) {
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return static_cast<ptn_plane_t::row_dots_t>((1u << w) - 1u) << (w - x);
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}
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void ptn_snap_quarter_8(
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screen_x_t left, vram_y_t top, int ptn_id, int quarter
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)
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{
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pixel_t y;
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vram_offset_t vram_offset = vram_offset_muldiv(left, top);
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pixel_t q_y;
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ptn_plane_t::row_dots_t q_mask;
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long q_x;
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ptn_t *ptn = ptn_with_id(ptn_id);
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q_y = ptn_quarter_y(quarter);
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q_mask = (quarter & 1)
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? dot_mask(PTN_QUARTER_W, PTN_QUARTER_W)
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: dot_mask( 0, PTN_QUARTER_W);
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q_x = ptn_quarter_x(quarter);
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for(y = q_y; y < (q_y + PTN_QUARTER_H); y++) {
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#define snap_quarter_plane(P, offset, w) \
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ptn->planes.P[y] &= q_mask; \
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ptn->planes.P[y] |= (VRAM_CHUNK(P, offset, w) << q_x) & ~q_mask;
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#define snap_quarter(offset, w) \
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snap_quarter_plane(B, offset, w); \
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snap_quarter_plane(R, offset, w); \
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snap_quarter_plane(G, offset, w); \
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snap_quarter_plane(E, offset, w);
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snap_quarter(vram_offset, PTN_W);
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#undef snap_quarter
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#undef snap_quarter_plane
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vram_offset += ROW_SIZE;
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}
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}
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