mirror of https://github.com/nmlgc/ReC98.git
38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
#include "defconv.h"
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// Requires the EGC to have been activated before.
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#define egc_setup_copy() \
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outport2(EGC_ACTIVEPLANEREG, 0xFFF0); \
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outport2(EGC_READPLANEREG, 0x00FF); \
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/* EGC_COMPAREREAD | EGC_WS_PATREG | EGC_RL_MEMREAD */ \
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outport2(EGC_MODE_ROP_REG, 0x3100); \
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outport2(EGC_MASKREG, 0xFFFF); \
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outport2(EGC_ADDRRESSREG, 0); \
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outport2(EGC_BITLENGTHREG, 0xF);
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// Requires the EGC to have been activated and set up for a copy before.
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// ZUN bloat: Can be merged into egc_setup_copy().
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#define egc_setup_copy_masked(mask) { \
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outport2(EGC_READPLANEREG, 0x00ff); \
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/* EGC_COMPAREREAD | EGC_WS_PATREG | EGC_RL_MEMREAD */ \
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outport2(EGC_MODE_ROP_REG, 0x3100); \
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outport2(EGC_BITLENGTHREG, 0xF); \
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outport(EGC_MASKREG, mask); \
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}
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// Blits the rectangle from
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// (⌊left/16⌋*16, top)
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// to
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// ((⌈(left + w)/16⌉*16), (top + h))
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// from VRAM page 1 to the same position on VRAM page 0.
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// Does not clamp the X coordinate to the horizontal resolution; if
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// ([left] + [w]) exceeds it or is negative, the blit operation will wrap
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// around into the next or previous line.
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void DEFCONV egc_copy_rect_1_to_0_16(
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screen_x_t left, vram_y_t top, pixel_t w, pixel_t h
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);
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// Unnecessary wrapper, as the regular function word-aligns [w] anyway.
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#define egc_copy_rect_1_to_0_16_word_w(left, top, w, h) \
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egc_copy_rect_1_to_0_16(left, top, (((w / 16) * 16) + 16), h);
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