elks-enhanced
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Owner: themaster
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Commits: 6893
Updated: 2026-04-19 00:15
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elks-enhanced
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elkscmd
/
unused
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nano-X
/
drivers
/
mempl4.c
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/* * Copyright (c) 1999 Greg Haerr <greg@censoft.com> * * 4 planes EGA/VGA Memory Video Driver for MicroWindows * Optional driver included with #define HAVEBLIT in vgaplan4.h * * 4bpp colors are stored in linear 4pp format in memory dc's * * In this driver, psd->linelen is line byte length, not line pixel length */ /*#define NDEBUG*/ #include <assert.h> #include <string.h> #include "../device.h" #include "vgaplan4.h" #if HAVEBLIT /* assumptions for speed: NOTE: psd is ignored in these routines*/ #define SCREENBASE MK_FP(0xa000, 0) #define BYTESPERLINE 80 typedef char *ADDR8; /* extern data*/ extern MODE gr_mode; /* temp kluge*/ static unsigned char notmask[2] = { 0x0f, 0xf0}; /* Set pixel at x, y, to pixelval c*/ void mempl4_drawpixel(PSD psd, COORD x, COORD y, PIXELVAL c) { ADDR8 addr = psd->addr; assert (addr != 0); assert (x >= 0 && x < psd->xres); assert (y >= 0 && y < psd->yres); assert (c >= 0 && c < psd->ncolors); addr += x/2 + y * psd->linelen; if(gr_mode == MODE_XOR) *addr = (*addr & notmask[x&1]) ^ (c << ((1-(x&1))*4)); else *addr = (*addr & notmask[x&1]) | (c << ((1-(x&1))*4)); } /* Read pixel at x, y*/ PIXELVAL mempl4_readpixel(PSD psd, COORD x, COORD y) { ADDR8 addr = psd->addr; assert (addr != 0); assert (x >= 0 && x < psd->xres); assert (y >= 0 && y < psd->yres); return (addr[x/2 + y * psd->linelen] >> ((1-(x&1))*4) ) & 0x0f; } /* Draw horizontal line from x1,y to x2,y not including final point*/ void mempl4_drawhorzline(PSD psd, COORD x1, COORD x2, COORD y, PIXELVAL c) { ADDR8 addr = psd->addr; assert (addr != 0); assert (x1 >= 0 && x1 < psd->xres); assert (x2 >= 0 && x2 <= psd->xres); assert (x2 >= x1); assert (y >= 0 && y < psd->yres); assert (c >= 0 && c < psd->ncolors); addr += x1/2 + y * psd->linelen; if(gr_mode == MODE_XOR) { while(x1 < x2) { *addr = (*addr & notmask[x1&1]) ^ (c << ((1-(x1&1))*4)); if((++x1 & 1) == 0) ++addr; } } else { while(x1 < x2) { *addr = (*addr & notmask[x1&1]) | (c << ((1-(x1&1))*4)); if((++x1 & 1) == 0) ++addr; } } } /* Draw a vertical line from x,y1 to x,y2 not including final point*/ void mempl4_drawvertline(PSD psd, COORD x, COORD y1, COORD y2, PIXELVAL c) { ADDR8 addr = psd->addr; int linelen = psd->linelen; assert (addr != 0); assert (x >= 0 && x < psd->xres); assert (y1 >= 0 && y1 < psd->yres); assert (y2 >= 0 && y2 <= psd->yres); assert (y2 >= y1); assert (c >= 0 && c < psd->ncolors); addr += x/2 + y1 * linelen; if(gr_mode == MODE_XOR) while(y1++ < y2) { *addr = (*addr & notmask[x&1]) ^ (c << ((1-(x&1))*4)); addr += linelen; } else while(y1++ < y2) { *addr = (*addr & notmask[x&1]) | (c << ((1-(x&1))*4)); addr += linelen; } } /* srccopy bitblt, opcode is currently ignored*/ /* copy from memdc to memdc*/ void mempl4_to_mempl4_blit(PSD dstpsd, COORD dstx, COORD dsty, COORD w, COORD h, PSD srcpsd, COORD srcx, COORD srcy, int op) { ADDR8 dst; ADDR8 src; int i; int dlinelen = dstpsd->linelen; int slinelen = srcpsd->linelen; assert (dstpsd->addr != 0); assert (dstx >= 0 && dstx < dstpsd->xres); assert (dsty >= 0 && dsty < dstpsd->yres); assert (w > 0); assert (h > 0); assert (srcpsd->addr != 0); assert (srcx >= 0 && srcx < srcpsd->xres); assert (srcy >= 0 && srcy < srcpsd->yres); assert (dstx+w <= dstpsd->xres); assert (dsty+h <= dstpsd->yres); assert (srcx+w <= srcpsd->xres); assert (srcy+h <= srcpsd->yres); dst = (char *)dstpsd->addr + dstx/2 + dsty * dlinelen; src = (char *)srcpsd->addr + srcx/2 + srcy * slinelen; while(--h >= 0) { volatile ADDR8 d = dst; volatile ADDR8 s = src; COORD dx = dstx; COORD sx = srcx; for(i=0; i<w; ++i) { *d = (*d & notmask[dx&1]) | ((*s >> ((1-(sx&1))*4) & 0x0f) << ((1-(dx&1))*4)); if((++dx & 1) == 0) ++d; if((++sx & 1) == 0) ++s; } dst += dlinelen; src += slinelen; } } /* srccopy bitblt, opcode is currently ignored*/ /* copy from vga memory to vga memory, psd's ignored for speed*/ void vga_to_vga_blit(PSD dstpsd, COORD dstx, COORD dsty, COORD w, COORD h, PSD srcpsd, COORD srcx, COORD srcy, int op) { volatile FARADDR dst; volatile FARADDR src; int i, plane; int x1, x2; assert (dstx >= 0 && dstx < dstpsd->xres); assert (dsty >= 0 && dsty < dstpsd->yres); assert (w > 0); assert (h > 0); assert (srcx >= 0 && srcx < srcpsd->xres); assert (srcy >= 0 && srcy < srcpsd->yres); assert (dstx+w <= dstpsd->xres); assert (dsty+h <= dstpsd->yres); assert (srcx+w <= srcpsd->xres); assert (srcy+h <= srcpsd->yres); set_enable_sr(0); dst = SCREENBASE + dstx/8 + dsty * BYTESPERLINE; src = SCREENBASE + srcx/8 + srcy * BYTESPERLINE; x1 = dstx/8; x2 = (dstx + w - 1) / 8; while(--h >= 0) { for(plane=0; plane<4; ++plane) { volatile FARADDR d = dst; volatile FARADDR s = src; set_read_plane(plane); set_write_planes(1 << plane); /* FIXME: only works if srcx and dstx are same modulo*/ select_mask(); if(x1 == x2) { set_mask((0xff >> (x1 & 7)) & (0xff << (7 - (x2 & 7)))); PUTBYTE_FP(d, GETBYTE_FP(s)); } else { set_mask(0xff >> (x1 & 7)); PUTBYTE_FP(d++, GETBYTE_FP(s++)); set_mask(0xff); for(i=x1+1; i<x2; ++i) PUTBYTE_FP(d++, GETBYTE_FP(s++)); set_mask(0xff << (7 - (x2 & 7))); PUTBYTE_FP(d, GETBYTE_FP(s)); } } dst += BYTESPERLINE; src += BYTESPERLINE; } set_write_planes(0x0f); set_enable_sr(0x0f); } /* srccopy bitblt, opcode is currently ignored*/ /* copy from memdc to vga memory*/ void mempl4_to_vga_blit(PSD dstpsd, COORD dstx, COORD dsty, COORD w, COORD h, PSD srcpsd, COORD srcx, COORD srcy, int op) { volatile FARADDR dst; ADDR8 src; int i; int slinelen = srcpsd->linelen; static unsigned char mask[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }; assert (dstx >= 0 && dstx < dstpsd->xres); assert (dsty >= 0 && dsty < dstpsd->yres); assert (w > 0); assert (h > 0); assert (srcpsd->addr != 0); assert (srcx >= 0 && srcx < srcpsd->xres); assert (srcy >= 0 && srcy < srcpsd->yres); assert (dstx+w <= dstpsd->xres); assert (dsty+h <= dstpsd->yres); assert (srcx+w <= srcpsd->xres); assert (srcy+h <= srcpsd->yres); set_op(0); /* modetable[MODE_SET]*/ dst = SCREENBASE + dstx/8 + dsty * BYTESPERLINE; src = (char *)srcpsd->addr + srcx/2 + srcy * slinelen; while(--h >= 0) { volatile FARADDR d = dst; volatile ADDR8 s = src; COORD dx = dstx; COORD sx = srcx; for(i=0; i<w; ++i) { set_color(*s >> ((1-(sx&1))*4) & 0x0f); select_mask(); set_mask (mask[dx&7]); RMW_FP(d); if((++dx & 7) == 0) ++d; if((++sx & 1) == 0) ++s; } dst += BYTESPERLINE; src += slinelen; } } /* srccopy bitblt, opcode is currently ignored*/ /* copy from vga memory to memdc*/ void vga_to_mempl4_blit(PSD dstpsd, COORD dstx, COORD dsty, COORD w, COORD h, PSD srcpsd, COORD srcx, COORD srcy, int op) { /* FIXME*/ } #endif /* HAVEBLIT*/
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