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205 lines
4.4 KiB
C
205 lines
4.4 KiB
C
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/* This file is included by video.c */
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#ifndef SUPERHIRES_INCLUDED
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const char rcsid_superhires_h[] = "@(#)$KmKId: superhires.h,v 1.9 2003-10-29 02:02:59-05 kentd Exp $";
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# define SUPERHIRES_INCLUDED
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#endif
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void
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SUPER_TYPE(byte *screen_data, int pixels_per_line, int y, int scan,
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word32 ch_mask, int use_a2vid_palette, int mode_640)
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{
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word32 *palptr;
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word32 mem_ptr;
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byte val0;
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int x1, x2;
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byte *b_ptr;
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word32 *img_ptr, *img_ptr2;
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word32 tmp, tmp2;
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word32 ch_tmp;
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byte *slow_mem_ptr;
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int shift_per;
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word32 pal;
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word32 pal_word;
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word32 pix0, pix1, pix2, pix3;
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word32 save_pix;
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int offset, next_line_offset;
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int dopr;
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mem_ptr = 0xa0 * y + 0x12000;
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tmp2 = 0;
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tmp = 0;
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shift_per = (1 << SHIFT_PER_CHANGE);
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if(use_a2vid_palette) {
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pal = (g_a2vid_palette & 0xf);
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} else {
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pal = (scan & 0xf);
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}
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if(SUPER_FILL) {
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ch_mask = -1;
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save_pix = 0;
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}
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if(use_a2vid_palette) {
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palptr = &(g_a2vid_palette_remap[0]);
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} else {
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palptr = &(g_palette_8to1624[pal * 16]);
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}
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dopr = 0;
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#if 0
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if(y == 1) {
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dopr = 1;
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printf("superhires line %d has ch_mask: %08x\n", y, ch_mask);
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}
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#endif
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for(x1 = 0; x1 < 0xa0; x1 += shift_per) {
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CH_LOOP_A2_VID(ch_mask, ch_tmp);
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pal_word = (pal << 28) + (pal << 20) + (pal << 12) +
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(pal << 4);
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if(mode_640 && !use_a2vid_palette) {
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#ifdef KEGS_LITTLE_ENDIAN
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pal_word += 0x04000c08;
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#else
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pal_word += 0x080c0004;
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#endif
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}
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slow_mem_ptr = &(g_slow_memory_ptr[mem_ptr + x1]);
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offset = y*2*pixels_per_line + x1*4;
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next_line_offset = pixels_per_line;
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#if SUPER_PIXEL_SIZE == 16
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offset *= 2;
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next_line_offset *= 2;
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#elif SUPER_PIXEL_SIZE == 32
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offset *= 4;
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next_line_offset *= 4;
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#endif
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b_ptr = &screen_data[offset];
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img_ptr = (word32 *)b_ptr;
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img_ptr2 = (word32 *)(b_ptr + next_line_offset);
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if(mode_640) {
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for(x2 = 0; x2 < shift_per; x2++) {
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val0 = *slow_mem_ptr++;
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pix0 = (val0 >> 6) & 0x3;
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pix1 = (val0 >> 4) & 0x3;
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pix2 = (val0 >> 2) & 0x3;
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pix3 = val0 & 0x3;
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if(use_a2vid_palette || (SUPER_PIXEL_SIZE > 8)){
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pix0 = palptr[pix0+8];
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pix1 = palptr[pix1+12];
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pix2 = palptr[pix2+0];
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pix3 = palptr[pix3+4];
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}
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#if SUPER_PIXEL_SIZE == 8
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# ifdef KEGS_LITTLE_ENDIAN
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tmp = (pix3 << 24) + (pix2 << 16) +
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(pix1 << 8) + pix0 + pal_word;
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# else
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tmp = (pix0 << 24) + (pix1 << 16) +
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(pix2 << 8) + pix3 + pal_word;
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# endif
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*img_ptr++ = tmp; *img_ptr2++ = tmp;
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#elif SUPER_PIXEL_SIZE == 16
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# ifdef KEGS_LITTLE_ENDIAN
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tmp = (pix1 << 16) + pix0;
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tmp2 = (pix3 << 16) + pix2;
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# else
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tmp = (pix0 << 16) + pix1;
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tmp2 = (pix2 << 16) + pix3;
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# endif
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*img_ptr++ = tmp;
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*img_ptr++ = tmp2;
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*img_ptr2++ = tmp;
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*img_ptr2++ = tmp2;
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#else /* SUPER_PIXEL_SIZE == 32 */
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*img_ptr++ = pix0;
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*img_ptr++ = pix1;
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*img_ptr++ = pix2;
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*img_ptr++ = pix3;
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*img_ptr2++ = pix0;
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*img_ptr2++ = pix1;
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*img_ptr2++ = pix2;
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*img_ptr2++ = pix3;
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#endif
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#if 0
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if(y == 1 && x1 == 0 && x2 == 0) {
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printf("y==1,x1,x2=0, %02x = %08x %08x "
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"%08x %08x, pal: %04x\n", val0,
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pix0, pix1, pix2, pix3, pal);
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printf("offset: %04x, nlo:%04x, ppl:"
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"%04x, %d\n", offset,
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next_line_offset,
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pixels_per_line, SUPER_PIXEL_SIZE);
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}
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#endif
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}
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} else { /* 320 mode */
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for(x2 = 0; x2 < shift_per; x2++) {
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val0 = *slow_mem_ptr++;
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pix0 = (val0 >> 4);
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if(SUPER_FILL) {
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if(pix0) {
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save_pix = pix0;
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} else {
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pix0 = save_pix;
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}
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}
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pix1 = (val0 & 0xf);
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if(SUPER_FILL) {
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if(pix1) {
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save_pix = pix1;
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} else {
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pix1 = save_pix;
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}
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}
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if(use_a2vid_palette || (SUPER_PIXEL_SIZE > 8)){
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pix0 = palptr[pix0];
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pix1 = palptr[pix1];
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}
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if(dopr && x1 == 0) {
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printf("y:%d, x2:%d, val:%02x = %08x %08x\n", y, x2, val0, pix0, pix1);
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}
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#if SUPER_PIXEL_SIZE == 8
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# ifdef KEGS_LITTLE_ENDIAN
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tmp = (pix1 << 24) + (pix1 << 16) +
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(pix0 << 8) + pix0 + pal_word;
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# else
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tmp = (pix0 << 24) + (pix0 << 16) +
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(pix1 << 8) + pix1 + pal_word;
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# endif
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*img_ptr++ = tmp; *img_ptr2++ = tmp;
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#elif SUPER_PIXEL_SIZE == 16
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tmp = (pix0 << 16) + pix0;
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tmp2 = (pix1 << 16) + pix1;
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*img_ptr++ = tmp;
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*img_ptr++ = tmp2;
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*img_ptr2++ = tmp;
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*img_ptr2++ = tmp2;
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#else /* SUPER_PIXEL_SIZE == 32 */
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*img_ptr++ = pix0;
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*img_ptr++ = pix0;
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*img_ptr++ = pix1;
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*img_ptr++ = pix1;
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*img_ptr2++ = pix0;
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*img_ptr2++ = pix0;
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*img_ptr2++ = pix1;
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*img_ptr2++ = pix1;
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#endif
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}
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}
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}
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}
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