Initial merge of VGA 2bpp/4bpp lo/hi res renderers
About half of it was taken from the EGA renderer. Also, the "force_old_addr" hack is kept here for now.
This commit is contained in:
GreaseMonkey
@@ -16,6 +16,7 @@
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* Copyright 2008-2019 Sarah Walker.
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* Copyright 2016-2019 Miran Grca.
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*/
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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@@ -392,202 +393,6 @@ svga_render_text_80_ksc5601(svga_t *svga)
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}
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}
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void
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svga_render_2bpp_lowres(svga_t *svga)
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{
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int changed_offset;
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int x;
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uint8_t dat[2];
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uint32_t addr;
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uint32_t *p;
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uint32_t changed_addr;
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if ((svga->displine + svga->y_add) < 0)
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return;
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if (svga->force_old_addr) {
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changed_offset = ((svga->ma << 1) + (svga->sc & ~svga->crtc[0x17] & 3) * 0x8000) >> 12;
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if (svga->changedvram[changed_offset] || svga->changedvram[changed_offset + 1] || svga->fullchange) {
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p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
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if (svga->firstline_draw == 2000)
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svga->firstline_draw = svga->displine;
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svga->lastline_draw = svga->displine;
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for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 16) {
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addr = svga->ma;
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if (!(svga->crtc[0x17] & 0x40)) {
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addr = (addr << 1) & svga->vram_mask;
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addr &= ~7;
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if ((svga->crtc[0x17] & 0x20) && (svga->ma & 0x20000))
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addr |= 4;
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if (!(svga->crtc[0x17] & 0x20) && (svga->ma & 0x8000))
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addr |= 4;
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}
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if (!(svga->crtc[0x17] & 0x01))
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addr = (addr & ~0x8000) | ((svga->sc & 1) ? 0x8000 : 0);
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if (!(svga->crtc[0x17] & 0x02))
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addr = (addr & ~0x10000) | ((svga->sc & 2) ? 0x10000 : 0);
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dat[0] = svga->vram[addr];
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dat[1] = svga->vram[addr | 0x1];
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if (svga->seqregs[1] & 4)
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svga->ma += 2;
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else
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svga->ma += 4;
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svga->ma &= svga->vram_mask;
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p[0] = p[1] = svga->pallook[svga->egapal[(dat[0] >> 6) & 3]];
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p[2] = p[3] = svga->pallook[svga->egapal[(dat[0] >> 4) & 3]];
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p[4] = p[5] = svga->pallook[svga->egapal[(dat[0] >> 2) & 3]];
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p[6] = p[7] = svga->pallook[svga->egapal[dat[0] & 3]];
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p[8] = p[9] = svga->pallook[svga->egapal[(dat[1] >> 6) & 3]];
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p[10] = p[11] = svga->pallook[svga->egapal[(dat[1] >> 4) & 3]];
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p[12] = p[13] = svga->pallook[svga->egapal[(dat[1] >> 2) & 3]];
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p[14] = p[15] = svga->pallook[svga->egapal[dat[1] & 3]];
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p += 16;
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}
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}
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} else {
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changed_addr = svga->remap_func(svga, svga->ma);
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if (svga->changedvram[changed_addr >> 12] || svga->changedvram[(changed_addr >> 12) + 1] || svga->fullchange) {
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p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
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if (svga->firstline_draw == 2000)
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svga->firstline_draw = svga->displine;
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svga->lastline_draw = svga->displine;
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for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 16) {
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addr = svga->remap_func(svga, svga->ma);
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dat[0] = svga->vram[addr];
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dat[1] = svga->vram[addr | 0x1];
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if (svga->seqregs[1] & 4)
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svga->ma += 2;
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else
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svga->ma += 4;
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svga->ma &= svga->vram_mask;
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p[0] = p[1] = svga->pallook[svga->egapal[(dat[0] >> 6) & 3]];
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p[2] = p[3] = svga->pallook[svga->egapal[(dat[0] >> 4) & 3]];
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p[4] = p[5] = svga->pallook[svga->egapal[(dat[0] >> 2) & 3]];
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p[6] = p[7] = svga->pallook[svga->egapal[dat[0] & 3]];
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p[8] = p[9] = svga->pallook[svga->egapal[(dat[1] >> 6) & 3]];
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p[10] = p[11] = svga->pallook[svga->egapal[(dat[1] >> 4) & 3]];
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p[12] = p[13] = svga->pallook[svga->egapal[(dat[1] >> 2) & 3]];
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p[14] = p[15] = svga->pallook[svga->egapal[dat[1] & 3]];
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p += 16;
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}
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}
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}
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}
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void
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svga_render_2bpp_highres(svga_t *svga)
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{
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int changed_offset;
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int x;
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uint8_t dat[2];
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uint32_t addr;
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uint32_t *p;
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uint32_t changed_addr;
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if ((svga->displine + svga->y_add) < 0)
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return;
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if (svga->force_old_addr) {
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changed_offset = ((svga->ma << 1) + (svga->sc & ~svga->crtc[0x17] & 3) * 0x8000) >> 12;
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if (svga->changedvram[changed_offset] || svga->changedvram[changed_offset + 1] || svga->fullchange) {
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p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
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if (svga->firstline_draw == 2000)
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svga->firstline_draw = svga->displine;
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svga->lastline_draw = svga->displine;
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for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 8) {
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addr = svga->ma;
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if (!(svga->crtc[0x17] & 0x40)) {
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addr = (addr << 1) & svga->vram_mask;
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addr &= ~7;
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if ((svga->crtc[0x17] & 0x20) && (svga->ma & 0x20000))
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addr |= 4;
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if (!(svga->crtc[0x17] & 0x20) && (svga->ma & 0x8000))
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addr |= 4;
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}
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if (!(svga->crtc[0x17] & 0x01))
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addr = (addr & ~0x8000) | ((svga->sc & 1) ? 0x8000 : 0);
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if (!(svga->crtc[0x17] & 0x02))
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addr = (addr & ~0x10000) | ((svga->sc & 2) ? 0x10000 : 0);
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dat[0] = svga->vram[addr];
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dat[1] = svga->vram[addr | 0x1];
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if (svga->seqregs[1] & 4)
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svga->ma += 2;
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else
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svga->ma += 4;
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svga->ma &= svga->vram_mask;
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p[0] = svga->pallook[svga->egapal[(dat[0] >> 6) & 3]];
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p[1] = svga->pallook[svga->egapal[(dat[0] >> 4) & 3]];
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p[2] = svga->pallook[svga->egapal[(dat[0] >> 2) & 3]];
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p[3] = svga->pallook[svga->egapal[dat[0] & 3]];
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p[4] = svga->pallook[svga->egapal[(dat[1] >> 6) & 3]];
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p[5] = svga->pallook[svga->egapal[(dat[1] >> 4) & 3]];
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p[6] = svga->pallook[svga->egapal[(dat[1] >> 2) & 3]];
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p[7] = svga->pallook[svga->egapal[dat[1] & 3]];
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p += 8;
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}
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}
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} else {
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changed_addr = svga->remap_func(svga, svga->ma);
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if (svga->changedvram[changed_addr >> 12] || svga->changedvram[(changed_addr >> 12) + 1] || svga->fullchange) {
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p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
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if (svga->firstline_draw == 2000)
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svga->firstline_draw = svga->displine;
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svga->lastline_draw = svga->displine;
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for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 8) {
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addr = svga->remap_func(svga, svga->ma);
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dat[0] = svga->vram[addr];
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dat[1] = svga->vram[addr | 0x1];
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if (svga->seqregs[1] & 4)
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svga->ma += 2;
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else
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svga->ma += 4;
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svga->ma &= svga->vram_mask;
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p[0] = svga->pallook[svga->egapal[(dat[0] >> 6) & 3]];
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p[1] = svga->pallook[svga->egapal[(dat[0] >> 4) & 3]];
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p[2] = svga->pallook[svga->egapal[(dat[0] >> 2) & 3]];
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p[3] = svga->pallook[svga->egapal[dat[0] & 3]];
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p[4] = svga->pallook[svga->egapal[(dat[1] >> 6) & 3]];
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p[5] = svga->pallook[svga->egapal[(dat[1] >> 4) & 3]];
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p[6] = svga->pallook[svga->egapal[(dat[1] >> 2) & 3]];
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p[7] = svga->pallook[svga->egapal[dat[1] & 3]];
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p += 8;
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}
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}
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}
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}
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void
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svga_render_2bpp_headland_highres(svga_t *svga)
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{
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@@ -644,7 +449,7 @@ svga_render_2bpp_headland_highres(svga_t *svga)
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}
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void
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svga_render_4bpp_lowres(svga_t *svga)
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svga_render_4bpp(svga_t *svga, bool highres, bool cga2bpp)
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{
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int x;
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int oddeven;
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@@ -652,234 +457,112 @@ svga_render_4bpp_lowres(svga_t *svga)
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uint32_t *p;
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uint8_t edat[4];
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uint8_t dat;
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uint32_t changed_addr;
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uint32_t changed_offset;
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if ((svga->displine + svga->y_add) < 0)
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return;
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if (svga->force_old_addr) {
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if (svga->changedvram[svga->ma >> 12] || svga->changedvram[(svga->ma >> 12) + 1] || svga->fullchange) {
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p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
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if (svga->firstline_draw == 2000)
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svga->firstline_draw = svga->displine;
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svga->lastline_draw = svga->displine;
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for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 16) {
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addr = svga->ma;
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oddeven = 0;
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if (!(svga->crtc[0x17] & 0x40)) {
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addr = (addr << 1) & svga->vram_mask;
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if (svga->seqregs[1] & 4)
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oddeven = (addr & 4) ? 1 : 0;
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addr &= ~7;
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if ((svga->crtc[0x17] & 0x20) && (svga->ma & 0x20000))
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addr |= 4;
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if (!(svga->crtc[0x17] & 0x20) && (svga->ma & 0x8000))
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addr |= 4;
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}
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if (!(svga->crtc[0x17] & 0x01))
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addr = (addr & ~0x8000) | ((svga->sc & 1) ? 0x8000 : 0);
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if (!(svga->crtc[0x17] & 0x02))
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addr = (addr & ~0x10000) | ((svga->sc & 2) ? 0x10000 : 0);
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if (svga->seqregs[1] & 4) {
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edat[0] = svga->vram[addr | oddeven];
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edat[2] = svga->vram[addr | oddeven | 0x2];
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edat[1] = edat[3] = 0;
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svga->ma += 2;
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} else {
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*(uint32_t *) (&edat[0]) = *(uint32_t *) (&svga->vram[addr]);
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svga->ma += 4;
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}
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svga->ma &= svga->vram_mask;
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dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
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p[0] = p[1] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[2] = p[3] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
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p[4] = p[5] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[6] = p[7] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
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p[8] = p[9] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[10] = p[11] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
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p[12] = p[13] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[14] = p[15] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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p += 16;
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}
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}
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} else {
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changed_addr = svga->remap_func(svga, svga->ma);
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if (svga->changedvram[changed_addr >> 12] || svga->changedvram[(changed_addr >> 12) + 1] || svga->fullchange) {
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p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
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if (svga->firstline_draw == 2000)
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svga->firstline_draw = svga->displine;
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svga->lastline_draw = svga->displine;
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for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 16) {
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addr = svga->remap_func(svga, svga->ma);
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oddeven = 0;
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if (svga->seqregs[1] & 4) {
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oddeven = (addr & 4) ? 1 : 0;
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edat[0] = svga->vram[addr | oddeven];
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edat[2] = svga->vram[addr | oddeven | 0x2];
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edat[1] = edat[3] = 0;
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svga->ma += 2;
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} else {
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*(uint32_t *) (&edat[0]) = *(uint32_t *) (&svga->vram[addr]);
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svga->ma += 4;
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}
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svga->ma &= svga->vram_mask;
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dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
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p[0] = p[1] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[2] = p[3] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
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p[4] = p[5] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[6] = p[7] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
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p[8] = p[9] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[10] = p[11] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
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p[12] = p[13] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
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p[14] = p[15] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
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p += 16;
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}
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}
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}
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}
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void
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svga_render_4bpp_highres(svga_t *svga)
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{
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int changed_offset;
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int x;
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int oddeven;
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uint32_t addr;
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uint32_t *p;
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uint8_t edat[4];
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uint8_t dat;
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uint32_t changed_addr;
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const bool blinked = svga->blink & 0x10;
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const bool attrblink = ((svga->attrregs[0x10] & 0x08) != 0);
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const bool wordmode = ((svga->crtc[0x17] & 0x40) == 0);
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const int dwshift = highres ? 0 : 1;
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const int dotwidth = 1 << dwshift;
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const int charwidth = dotwidth * 8;
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const uint8_t blinkmask = (attrblink && blinked ? 0x8 : 0x0);
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if ((svga->displine + svga->y_add) < 0)
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return;
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if (svga->force_old_addr) {
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changed_offset = (svga->ma + (svga->sc & ~svga->crtc[0x17] & 3) * 0x8000) >> 12;
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|
||||
if (svga->changedvram[changed_offset] || svga->changedvram[changed_offset + 1] || svga->fullchange) {
|
||||
p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
|
||||
|
||||
if (svga->firstline_draw == 2000)
|
||||
svga->firstline_draw = svga->displine;
|
||||
svga->lastline_draw = svga->displine;
|
||||
|
||||
for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 8) {
|
||||
addr = svga->ma;
|
||||
oddeven = 0;
|
||||
|
||||
if (!(svga->crtc[0x17] & 0x40)) {
|
||||
addr = (addr << 1) & svga->vram_mask;
|
||||
|
||||
if (svga->seqregs[1] & 4)
|
||||
oddeven = (addr & 4) ? 1 : 0;
|
||||
|
||||
addr &= ~7;
|
||||
|
||||
if ((svga->crtc[0x17] & 0x20) && (svga->ma & 0x20000))
|
||||
addr |= 4;
|
||||
if (!(svga->crtc[0x17] & 0x20) && (svga->ma & 0x8000))
|
||||
addr |= 4;
|
||||
}
|
||||
|
||||
if (!(svga->crtc[0x17] & 0x01))
|
||||
addr = (addr & ~0x8000) | ((svga->sc & 1) ? 0x8000 : 0);
|
||||
if (!(svga->crtc[0x17] & 0x02))
|
||||
addr = (addr & ~0x10000) | ((svga->sc & 2) ? 0x10000 : 0);
|
||||
|
||||
if (svga->seqregs[1] & 4) {
|
||||
edat[0] = svga->vram[addr | oddeven];
|
||||
edat[2] = svga->vram[addr | oddeven | 0x2];
|
||||
edat[1] = edat[3] = 0;
|
||||
svga->ma += 2;
|
||||
} else {
|
||||
*(uint32_t *) (&edat[0]) = *(uint32_t *) (&svga->vram[addr]);
|
||||
svga->ma += 4;
|
||||
}
|
||||
svga->ma &= svga->vram_mask;
|
||||
|
||||
dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
|
||||
p[0] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[1] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
|
||||
p[2] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[3] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
|
||||
p[4] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[5] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
|
||||
p[6] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[7] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
|
||||
p += 8;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
changed_addr = svga->remap_func(svga, svga->ma);
|
||||
changed_offset = svga->remap_func(svga, svga->ma) >> 12;
|
||||
}
|
||||
|
||||
if (svga->changedvram[changed_addr >> 12] || svga->changedvram[(changed_addr >> 12) + 1] || svga->fullchange) {
|
||||
p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
|
||||
if (!(svga->changedvram[changed_offset] || svga->changedvram[changed_offset + 1] || svga->fullchange)) {
|
||||
return;
|
||||
}
|
||||
p = &svga->monitor->target_buffer->line[svga->displine + svga->y_add][svga->x_add];
|
||||
|
||||
if (svga->firstline_draw == 2000)
|
||||
svga->firstline_draw = svga->displine;
|
||||
svga->lastline_draw = svga->displine;
|
||||
if (svga->firstline_draw == 2000)
|
||||
svga->firstline_draw = svga->displine;
|
||||
svga->lastline_draw = svga->displine;
|
||||
|
||||
for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += 8) {
|
||||
addr = svga->remap_func(svga, svga->ma);
|
||||
oddeven = 0;
|
||||
for (x = 0; x <= (svga->hdisp + svga->scrollcache); x += charwidth) {
|
||||
oddeven = 0;
|
||||
|
||||
if (svga->seqregs[1] & 4) {
|
||||
if (svga->force_old_addr) {
|
||||
addr = svga->ma;
|
||||
|
||||
if (wordmode) {
|
||||
addr = (addr << 1) & svga->vram_mask;
|
||||
|
||||
if (svga->seqregs[1] & 4)
|
||||
oddeven = (addr & 4) ? 1 : 0;
|
||||
edat[0] = svga->vram[addr | oddeven];
|
||||
edat[2] = svga->vram[addr | oddeven | 0x2];
|
||||
edat[1] = edat[3] = 0;
|
||||
svga->ma += 2;
|
||||
} else {
|
||||
*(uint32_t *) (&edat[0]) = *(uint32_t *) (&svga->vram[addr]);
|
||||
svga->ma += 4;
|
||||
}
|
||||
svga->ma &= svga->vram_mask;
|
||||
|
||||
dat = edatlookup[edat[0] >> 6][edat[1] >> 6] | (edatlookup[edat[2] >> 6][edat[3] >> 6] << 2);
|
||||
p[0] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[1] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
dat = edatlookup[(edat[0] >> 4) & 3][(edat[1] >> 4) & 3] | (edatlookup[(edat[2] >> 4) & 3][(edat[3] >> 4) & 3] << 2);
|
||||
p[2] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[3] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
dat = edatlookup[(edat[0] >> 2) & 3][(edat[1] >> 2) & 3] | (edatlookup[(edat[2] >> 2) & 3][(edat[3] >> 2) & 3] << 2);
|
||||
p[4] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[5] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
dat = edatlookup[edat[0] & 3][edat[1] & 3] | (edatlookup[edat[2] & 3][edat[3] & 3] << 2);
|
||||
p[6] = svga->pallook[svga->egapal[(dat >> 4) & svga->plane_mask]];
|
||||
p[7] = svga->pallook[svga->egapal[dat & svga->plane_mask]];
|
||||
addr &= ~7;
|
||||
|
||||
p += 8;
|
||||
if ((svga->crtc[0x17] & 0x20) && (svga->ma & 0x20000))
|
||||
addr |= 4;
|
||||
if (!(svga->crtc[0x17] & 0x20) && (svga->ma & 0x8000))
|
||||
addr |= 4;
|
||||
}
|
||||
|
||||
if (!(svga->crtc[0x17] & 0x01))
|
||||
addr = (addr & ~0x8000) | ((svga->sc & 1) ? 0x8000 : 0);
|
||||
if (!(svga->crtc[0x17] & 0x02))
|
||||
addr = (addr & ~0x10000) | ((svga->sc & 2) ? 0x10000 : 0);
|
||||
} else {
|
||||
addr = svga->remap_func(svga, svga->ma);
|
||||
}
|
||||
|
||||
if (svga->seqregs[1] & 4) {
|
||||
if (!svga->force_old_addr) {
|
||||
oddeven = (addr & 4) ? 1 : 0;
|
||||
}
|
||||
edat[0] = svga->vram[addr | oddeven];
|
||||
edat[2] = svga->vram[addr | oddeven | 0x2];
|
||||
edat[1] = edat[3] = 0;
|
||||
svga->ma += 2;
|
||||
} else {
|
||||
*(uint32_t *) (&edat[0]) = *(uint32_t *) (&svga->vram[addr]);
|
||||
svga->ma += 4;
|
||||
}
|
||||
svga->ma &= svga->vram_mask;
|
||||
|
||||
if (cga2bpp) {
|
||||
// Remap CGA 2bpp-chunky data into fully planar data
|
||||
uint8_t dat0 = egaremap2bpp[edat[1]] | (egaremap2bpp[edat[0]] << 4);
|
||||
uint8_t dat1 = egaremap2bpp[edat[1] >> 1] | (egaremap2bpp[edat[0] >> 1] << 4);
|
||||
uint8_t dat2 = egaremap2bpp[edat[3]] | (egaremap2bpp[edat[2]] << 4);
|
||||
uint8_t dat3 = egaremap2bpp[edat[3] >> 1] | (egaremap2bpp[edat[2] >> 1] << 4);
|
||||
edat[0] = dat0;
|
||||
edat[1] = dat1;
|
||||
edat[2] = dat2;
|
||||
edat[3] = dat3;
|
||||
}
|
||||
|
||||
for (int i = 0; i < 8; i += 2) {
|
||||
const int outoffs = i << dwshift;
|
||||
const int inshift = 6 - i;
|
||||
uint8_t dat = (edatlookup[(edat[0] >> inshift) & 3][(edat[1] >> inshift) & 3])
|
||||
| (edatlookup[(edat[2] >> inshift) & 3][(edat[3] >> inshift) & 3] << 2);
|
||||
// FIXME: Confirm blink behaviour is actually XOR on real hardware
|
||||
uint32_t p0 = svga->pallook[svga->egapal[((dat >> 4) & svga->plane_mask) ^ blinkmask]];
|
||||
uint32_t p1 = svga->pallook[svga->egapal[(dat & svga->plane_mask) ^ blinkmask]];
|
||||
for (int subx = 0; subx < dotwidth; subx++)
|
||||
p[outoffs + subx] = p0;
|
||||
for (int subx = 0; subx < dotwidth; subx++)
|
||||
p[outoffs + subx + dotwidth] = p1;
|
||||
}
|
||||
|
||||
p += charwidth;
|
||||
}
|
||||
}
|
||||
|
||||
// Remap these to the 4bpp renderer
|
||||
void svga_render_2bpp_lowres(svga_t *svga) { svga_render_4bpp(svga, false, true); }
|
||||
void svga_render_2bpp_highres(svga_t *svga) { svga_render_4bpp(svga, true, true); }
|
||||
void svga_render_4bpp_lowres(svga_t *svga) { svga_render_4bpp(svga, false, false); }
|
||||
void svga_render_4bpp_highres(svga_t *svga) { svga_render_4bpp(svga, true, false); }
|
||||
|
||||
void
|
||||
svga_render_8bpp_lowres(svga_t *svga)
|
||||
{
|
||||
|
||||
Reference in New Issue
Block a user