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sonarlint vid_ega_render.c

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This commit is contained in:
Jasmine Iwanek
2023-07-31 14:45:22 -04:00
parent a65c2164e0
commit 367f3b574b
1 changed files with 37 additions and 37 deletions
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74
src/video/vid_ega_render.c
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@@ -115,16 +115,16 @@ ega_render_text(ega_t *ega)
ega->lastline_draw = ega->displine;
if (ega->fullchange) {
const bool doublewidth = ((ega->seqregs[1] & 8) != 0);
const bool attrblink = ((ega->attrregs[0x10] & 8) != 0);
const bool doublewidth = ((ega->seqregs[1] & 8) != 0);
const bool attrblink = ((ega->attrregs[0x10] & 8) != 0);
const bool attrlinechars = (ega->attrregs[0x10] & 4);
const bool crtcreset = ((ega->crtc[0x17] & 0x80) == 0);
const bool seq9dot = ((ega->seqregs[1] & 1) == 0);
const int dwshift = doublewidth ? 1 : 0;
const int dotwidth = 1 << dwshift;
const int charwidth = dotwidth*(seq9dot ? 9 : 8);
const bool blinked = ega->blink & 0x10;
uint32_t *p = &buffer32->line[ega->displine + ega->y_add][ega->x_add];
const bool crtcreset = ((ega->crtc[0x17] & 0x80) == 0);
const bool seq9dot = ((ega->seqregs[1] & 1) == 0);
const int dwshift = doublewidth ? 1 : 0;
const int dotwidth = 1 << dwshift;
const int charwidth = dotwidth * (seq9dot ? 9 : 8);
const bool blinked = ega->blink & 0x10;
uint32_t *p = &buffer32->line[ega->displine + ega->y_add][ega->x_add];
for (int x = 0; x < (ega->hdisp + ega->scrollcache); x += charwidth) {
uint32_t addr = ega->remap_func(ega, ega->ma) & ega->vrammask;
@@ -167,7 +167,7 @@ ega_render_text(ega_t *ega)
dat |= (dat >> 1) & 1;
for (int xx = 0; xx < charwidth; xx++)
p[xx] = (dat & (0x100 >> (xx>>dwshift))) ? fg : bg;
p[xx] = (dat & (0x100 >> (xx >> dwshift))) ? fg : bg;
ega->ma += 4;
p += charwidth;
@@ -186,28 +186,28 @@ ega_render_graphics(ega_t *ega)
ega->firstline_draw = ega->displine;
ega->lastline_draw = ega->displine;
const bool doublewidth = ((ega->seqregs[1] & 8) != 0);
const bool cga2bpp = ((ega->gdcreg[5] & 0x20) != 0);
const bool attrblink = ((ega->attrregs[0x10] & 8) != 0);
const bool blinked = ega->blink & 0x10;
const bool crtcreset = ((ega->crtc[0x17] & 0x80) == 0);
const bool seqoddeven = ((ega->seqregs[1] & 4) != 0);
const uint8_t blinkmask = (attrblink && blinked ? 0x8 : 0x0);
uint32_t *p = &buffer32->line[ega->displine + ega->y_add][ega->x_add];
const int dwshift = doublewidth ? 1 : 0;
const int dotwidth = 1 << dwshift;
const int charwidth = dotwidth*8;
int secondcclk = 0;
const bool doublewidth = ((ega->seqregs[1] & 8) != 0);
const bool cga2bpp = ((ega->gdcreg[5] & 0x20) != 0);
const bool attrblink = ((ega->attrregs[0x10] & 8) != 0);
const bool blinked = ega->blink & 0x10;
const bool crtcreset = ((ega->crtc[0x17] & 0x80) == 0);
const bool seqoddeven = ((ega->seqregs[1] & 4) != 0);
const uint8_t blinkmask = (attrblink && blinked ? 0x8 : 0x0);
uint32_t *p = &buffer32->line[ega->displine + ega->y_add][ega->x_add];
const int dwshift = doublewidth ? 1 : 0;
const int dotwidth = 1 << dwshift;
const int charwidth = dotwidth * 8;
int secondcclk = 0;
for (int x = 0; x <= (ega->hdisp + ega->scrollcache); x += charwidth) {
uint32_t addr = ega->remap_func(ega, ega->ma) & ega->vrammask;
uint8_t edat[4];
if (seqoddeven) {
// FIXME: Verify the behaviour of planes 1,3 on actual hardware
edat[0] = ega->vram[(addr | 0) ^ secondcclk];
edat[1] = ega->vram[(addr | 1) ^ secondcclk];
edat[2] = ega->vram[(addr | 2) ^ secondcclk];
edat[3] = ega->vram[(addr | 3) ^ secondcclk];
edat[0] = ega->vram[(addr | 0) ^ secondcclk];
edat[1] = ega->vram[(addr | 1) ^ secondcclk];
edat[2] = ega->vram[(addr | 2) ^ secondcclk];
edat[3] = ega->vram[(addr | 3) ^ secondcclk];
secondcclk = (secondcclk + 1) & 1;
if (secondcclk == 0)
ega->ma += 4;
@@ -219,25 +219,25 @@ ega_render_graphics(ega_t *ega)
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;
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;
}
if (!crtcreset) {
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);
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 = ega->pallook[ega->egapal[((dat >> 4) & ega->plane_mask) ^ blinkmask]];
uint32_t p1 = ega->pallook[ega->egapal[(dat & ega->plane_mask) ^ blinkmask]];
uint32_t p1 = ega->pallook[ega->egapal[(dat & ega->plane_mask) ^ blinkmask]];
for (int subx = 0; subx < dotwidth; subx++)
p[outoffs + subx] = p0;
for (int subx = 0; subx < dotwidth; subx++)