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Voodoo2 bitBLT: optimized SGRAM fill code a little bit.

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This commit is contained in:
Volker Ruppert 2017-05-17 21:21:53 +00:00
parent 9912c99fd2
commit 495a8afeac
1 changed files with 18 additions and 11 deletions
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29
bochs/iodev/display/voodoo_func.h
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@ -1427,8 +1427,9 @@ void recompute_video_memory(voodoo_state *v)
void voodoo_bitblt(void)
{
Bit8u command = (Bit8u)(v->reg[bltCommand].u & 0x07);
Bit8u b1, b2;
Bit16u c, cols, dst_x, dst_y, fgcolor, r, rows, size;
Bit32u offset, loffset;
Bit32u offset, loffset, stride;
switch (command) {
case 0:
@ -1446,27 +1447,33 @@ void voodoo_bitblt(void)
cols = (Bit16u)(v->reg[bltSize].u & 0x1ff);
rows = (Bit16u)((v->reg[bltSize].u >> 16) & 0x1ff);
fgcolor = (Bit16u)(v->reg[bltColor].u & 0xffff);
loffset = (4 << v->fbi.lfb_stride);
b1 = (Bit8u)(fgcolor & 0xff);
b2 = (Bit8u)(fgcolor >> 8);
stride = (4 << v->fbi.lfb_stride);
loffset = dst_y * stride;
for (r = 0; r <= rows; r++) {
offset = dst_y * loffset;
if (r == 0) {
offset += dst_x * 2;
size = loffset / 2 - dst_x;
} else if (r == rows) {
size = cols;
offset = (loffset + dst_x * 2) & v->fbi.mask;
size = stride / 2 - dst_x;
} else {
size = loffset / 2;
offset = (loffset & v->fbi.mask);
if (r == rows) {
size = cols;
} else {
size = stride / 2;
}
}
for (c = 0; c < size; c++) {
v->fbi.ram[offset + c * 2] = (Bit8u)(fgcolor & 0xff);
v->fbi.ram[offset + c * 2 + 1] = (Bit8u)(fgcolor >> 8);
v->fbi.ram[offset++] = b1;
v->fbi.ram[offset++] = b2;
}
dst_y++;
loffset += stride;
}
break;
default:
BX_ERROR(("Voodoo bitBLT: unknown command %d)", command));
}
v->fbi.video_changed = 1;
}