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86Box/src/video/vid_voodoo_display.c

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/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* 3DFX Voodoo emulation.
*
*
*
* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
*
* Copyright 2008-2020 Sarah Walker.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <wchar.h>
#include <math.h>
#include <86box/86box.h>
#include "cpu.h"
#include <86box/machine.h>
#include <86box/device.h>
#include <86box/mem.h>
#include <86box/timer.h>
#include <86box/device.h>
#include <86box/plat.h>
#include <86box/video.h>
#include <86box/vid_svga.h>
#include <86box/vid_voodoo_common.h>
#include <86box/vid_voodoo_display.h>
#include <86box/vid_voodoo_regs.h>
#include <86box/vid_voodoo_render.h>
#ifdef ENABLE_VOODOODISP_LOG
int voodoodisp_do_log = ENABLE_VOODOODISP_LOG;
static void
voodoodisp_log(const char *fmt, ...)
{
va_list ap;
if (voodoodisp_do_log) {
va_start(ap, fmt);
pclog_ex(fmt, ap);
va_end(ap);
}
}
#else
#define voodoodisp_log(fmt, ...)
#endif
void voodoo_update_ncc(voodoo_t *voodoo, int tmu)
{
int tbl;
for (tbl = 0; tbl < 2; tbl++)
{
int col;
for (col = 0; col < 256; col++)
{
int y = (col >> 4), i = (col >> 2) & 3, q = col & 3;
int i_r, i_g, i_b;
int q_r, q_g, q_b;
y = (voodoo->nccTable[tmu][tbl].y[y >> 2] >> ((y & 3) * 8)) & 0xff;
i_r = (voodoo->nccTable[tmu][tbl].i[i] >> 18) & 0x1ff;
if (i_r & 0x100)
i_r |= 0xfffffe00;
i_g = (voodoo->nccTable[tmu][tbl].i[i] >> 9) & 0x1ff;
if (i_g & 0x100)
i_g |= 0xfffffe00;
i_b = voodoo->nccTable[tmu][tbl].i[i] & 0x1ff;
if (i_b & 0x100)
i_b |= 0xfffffe00;
q_r = (voodoo->nccTable[tmu][tbl].q[q] >> 18) & 0x1ff;
if (q_r & 0x100)
q_r |= 0xfffffe00;
q_g = (voodoo->nccTable[tmu][tbl].q[q] >> 9) & 0x1ff;
if (q_g & 0x100)
q_g |= 0xfffffe00;
q_b = voodoo->nccTable[tmu][tbl].q[q] & 0x1ff;
if (q_b & 0x100)
q_b |= 0xfffffe00;
voodoo->ncc_lookup[tmu][tbl][col].rgba.r = CLAMP(y + i_r + q_r);
voodoo->ncc_lookup[tmu][tbl][col].rgba.g = CLAMP(y + i_g + q_g);
voodoo->ncc_lookup[tmu][tbl][col].rgba.b = CLAMP(y + i_b + q_b);
voodoo->ncc_lookup[tmu][tbl][col].rgba.a = 0xff;
}
}
}
void voodoo_pixelclock_update(voodoo_t *voodoo)
{
int m = (voodoo->dac_pll_regs[0] & 0x7f) + 2;
int n1 = ((voodoo->dac_pll_regs[0] >> 8) & 0x1f) + 2;
int n2 = ((voodoo->dac_pll_regs[0] >> 13) & 0x07);
float t = (14318184.0 * ((float)m / (float)n1)) / (float)(1 << n2);
double clock_const;
int line_length;
if ((voodoo->dac_data[6] & 0xf0) == 0x20 ||
(voodoo->dac_data[6] & 0xf0) == 0x60 ||
(voodoo->dac_data[6] & 0xf0) == 0x70)
t /= 2.0f;
line_length = (voodoo->hSync & 0xff) + ((voodoo->hSync >> 16) & 0x3ff);
// voodoodisp_log("Pixel clock %f MHz hsync %08x line_length %d\n", t, voodoo->hSync, line_length);
voodoo->pixel_clock = t;
clock_const = cpuclock / t;
voodoo->line_time = (uint64_t)((double)line_length * clock_const * (double)(1ull << 32));
}
static void voodoo_calc_clutData(voodoo_t *voodoo)
{
int c;
for (c = 0; c < 256; c++)
{
voodoo->clutData256[c].r = (voodoo->clutData[c >> 3].r*(8-(c & 7)) +
voodoo->clutData[(c >> 3)+1].r*(c & 7)) >> 3;
voodoo->clutData256[c].g = (voodoo->clutData[c >> 3].g*(8-(c & 7)) +
voodoo->clutData[(c >> 3)+1].g*(c & 7)) >> 3;
voodoo->clutData256[c].b = (voodoo->clutData[c >> 3].b*(8-(c & 7)) +
voodoo->clutData[(c >> 3)+1].b*(c & 7)) >> 3;
}
for (c = 0; c < 65536; c++)
{
int r = (c >> 8) & 0xf8;
int g = (c >> 3) & 0xfc;
int b = (c << 3) & 0xf8;
// r |= (r >> 5);
// g |= (g >> 6);
// b |= (b >> 5);
voodoo->video_16to32[c] = (voodoo->clutData256[r].r << 16) | (voodoo->clutData256[g].g << 8) | voodoo->clutData256[b].b;
}
}
#define FILTDIV 256
static int FILTCAP, FILTCAPG, FILTCAPB = 0; /* color filter threshold values */
void voodoo_generate_filter_v1(voodoo_t *voodoo)
{
int g, h;
float difference, diffg, diffb;
float thiscol, thiscolg, thiscolb, lined;
float fcr, fcg, fcb;
fcr = FILTCAP * 5;
fcg = FILTCAPG * 6;
fcb = FILTCAPB * 5;
for (g=0;g<FILTDIV;g++) // pixel 1
{
for (h=0;h<FILTDIV;h++) // pixel 2
{
difference = (float)(h - g);
diffg = difference;
diffb = difference;
thiscol = thiscolg = thiscolb = g;
if (difference > FILTCAP)
difference = FILTCAP;
if (difference < -FILTCAP)
difference = -FILTCAP;
if (diffg > FILTCAPG)
diffg = FILTCAPG;
if (diffg < -FILTCAPG)
diffg = -FILTCAPG;
if (diffb > FILTCAPB)
diffb = FILTCAPB;
if (diffb < -FILTCAPB)
diffb = -FILTCAPB;
// hack - to make it not bleed onto black
//if (g == 0){
//difference = diffg = diffb = 0;
//}
if ((difference < fcr) || (-difference > -fcr))
thiscol = g + (difference / 2);
if ((diffg < fcg) || (-diffg > -fcg))
thiscolg = g + (diffg / 2); /* need these divides so we can actually undither! */
if ((diffb < fcb) || (-diffb > -fcb))
thiscolb = g + (diffb / 2);
if (thiscol < 0)
thiscol = 0;
if (thiscol > FILTDIV-1)
thiscol = FILTDIV-1;
if (thiscolg < 0)
thiscolg = 0;
if (thiscolg > FILTDIV-1)
thiscolg = FILTDIV-1;
if (thiscolb < 0)
thiscolb = 0;
if (thiscolb > FILTDIV-1)
thiscolb = FILTDIV-1;
voodoo->thefilter[g][h] = thiscol;
voodoo->thefilterg[g][h] = thiscolg;
voodoo->thefilterb[g][h] = thiscolb;
}
lined = g + 4;
if (lined > 255)
lined = 255;
voodoo->purpleline[g][0] = lined;
voodoo->purpleline[g][2] = lined;
lined = g + 0;
if (lined > 255)
lined = 255;
voodoo->purpleline[g][1] = lined;
}
}
void voodoo_generate_filter_v2(voodoo_t *voodoo)
{
int g, h;
float difference;
float thiscol, thiscolg, thiscolb;
float clr, clg, clb = 0;
float fcr, fcg, fcb = 0;
// pre-clamping
fcr = FILTCAP;
fcg = FILTCAPG;
fcb = FILTCAPB;
if (fcr > 32) fcr = 32;
if (fcg > 32) fcg = 32;
if (fcb > 32) fcb = 32;
for (g=0;g<256;g++) // pixel 1 - our target pixel we want to bleed into
{
for (h=0;h<256;h++) // pixel 2 - our main pixel
{
float avg;
float avgdiff;
difference = (float)(g - h);
avg = (float)((g + g + g + g + h) / 5);
avgdiff = avg - (float)((g + h + h + h + h) / 5);
if (avgdiff < 0) avgdiff *= -1;
if (difference < 0) difference *= -1;
thiscol = thiscolg = thiscolb = g;
// try lighten
if (h > g)
{
clr = clg = clb = avgdiff;
if (clr>fcr) clr=fcr;
if (clg>fcg) clg=fcg;
if (clb>fcb) clb=fcb;
thiscol = g + clr;
thiscolg = g + clg;
thiscolb = g + clb;
if (thiscol>g+FILTCAP)
thiscol=g+FILTCAP;
if (thiscolg>g+FILTCAPG)
thiscolg=g+FILTCAPG;
if (thiscolb>g+FILTCAPB)
thiscolb=g+FILTCAPB;
if (thiscol>g+avgdiff)
thiscol=g+avgdiff;
if (thiscolg>g+avgdiff)
thiscolg=g+avgdiff;
if (thiscolb>g+avgdiff)
thiscolb=g+avgdiff;
}
if (difference > FILTCAP)
thiscol = g;
if (difference > FILTCAPG)
thiscolg = g;
if (difference > FILTCAPB)
thiscolb = g;
// clamp
if (thiscol < 0) thiscol = 0;
if (thiscolg < 0) thiscolg = 0;
if (thiscolb < 0) thiscolb = 0;
if (thiscol > 255) thiscol = 255;
if (thiscolg > 255) thiscolg = 255;
if (thiscolb > 255) thiscolb = 255;
// add to the table
voodoo->thefilter[g][h] = (thiscol);
voodoo->thefilterg[g][h] = (thiscolg);
voodoo->thefilterb[g][h] = (thiscolb);
// debug the ones that don't give us much of a difference
//if (difference < FILTCAP)
//voodoodisp_log("Voodoofilter: %ix%i - %f difference, %f average difference, R=%f, G=%f, B=%f\n", g, h, difference, avgdiff, thiscol, thiscolg, thiscolb);
}
}
}
void voodoo_threshold_check(voodoo_t *voodoo)
{
int r, g, b;
if (!voodoo->scrfilterEnabled)
return; /* considered disabled; don't check and generate */
/* Check for changes, to generate anew table */
if (voodoo->scrfilterThreshold != voodoo->scrfilterThresholdOld)
{
r = (voodoo->scrfilterThreshold >> 16) & 0xFF;
g = (voodoo->scrfilterThreshold >> 8 ) & 0xFF;
b = voodoo->scrfilterThreshold & 0xFF;
FILTCAP = r;
FILTCAPG = g;
FILTCAPB = b;
voodoodisp_log("Voodoo Filter Threshold Check: %06x - RED %i GREEN %i BLUE %i\n", voodoo->scrfilterThreshold, r, g, b);
voodoo->scrfilterThresholdOld = voodoo->scrfilterThreshold;
if (voodoo->type == VOODOO_2)
voodoo_generate_filter_v2(voodoo);
else
voodoo_generate_filter_v1(voodoo);
if (voodoo->type >= VOODOO_BANSHEE)
voodoo_generate_vb_filters(voodoo, FILTCAP, FILTCAPG);
}
}
static void voodoo_filterline_v1(voodoo_t *voodoo, uint8_t *fil, int column, uint16_t *src, int line)
{
int x;
// Scratchpad for avoiding feedback streaks
uint8_t fil3[(voodoo->h_disp) * 3];
/* 16 to 32-bit */
for (x=0; x<column;x++)
{
fil[x*3] = ((src[x] & 31) << 3);
fil[x*3+1] = (((src[x] >> 5) & 63) << 2);
fil[x*3+2] = (((src[x] >> 11) & 31) << 3);
// Copy to our scratchpads
fil3[x*3+0] = fil[x*3+0];
fil3[x*3+1] = fil[x*3+1];
fil3[x*3+2] = fil[x*3+2];
}
/* lines */
if (line & 1)
{
for (x=0; x<column;x++)
{
fil[x*3] = voodoo->purpleline[fil[x*3]][0];
fil[x*3+1] = voodoo->purpleline[fil[x*3+1]][1];
fil[x*3+2] = voodoo->purpleline[fil[x*3+2]][2];
}
}
/* filtering time */
for (x=1; x<column;x++)
{
fil3[(x)*3] = voodoo->thefilterb[fil[x*3]][fil[ (x-1) *3]];
fil3[(x)*3+1] = voodoo->thefilterg[fil[x*3+1]][fil[ (x-1) *3+1]];
fil3[(x)*3+2] = voodoo->thefilter[fil[x*3+2]][fil[ (x-1) *3+2]];
}
for (x=1; x<column;x++)
{
fil[(x)*3] = voodoo->thefilterb[fil3[x*3]][fil3[ (x-1) *3]];
fil[(x)*3+1] = voodoo->thefilterg[fil3[x*3+1]][fil3[ (x-1) *3+1]];
fil[(x)*3+2] = voodoo->thefilter[fil3[x*3+2]][fil3[ (x-1) *3+2]];
}
for (x=1; x<column;x++)
{
fil3[(x)*3] = voodoo->thefilterb[fil[x*3]][fil[ (x-1) *3]];
fil3[(x)*3+1] = voodoo->thefilterg[fil[x*3+1]][fil[ (x-1) *3+1]];
fil3[(x)*3+2] = voodoo->thefilter[fil[x*3+2]][fil[ (x-1) *3+2]];
}
for (x=0; x<column-1;x++)
{
fil[(x)*3] = voodoo->thefilterb[fil3[x*3]][fil3[ (x+1) *3]];
fil[(x)*3+1] = voodoo->thefilterg[fil3[x*3+1]][fil3[ (x+1) *3+1]];
fil[(x)*3+2] = voodoo->thefilter[fil3[x*3+2]][fil3[ (x+1) *3+2]];
}
}
static void voodoo_filterline_v2(voodoo_t *voodoo, uint8_t *fil, int column, uint16_t *src, int line)
{
int x;
// Scratchpad for blending filter
uint8_t fil3[(voodoo->h_disp) * 3];
/* 16 to 32-bit */
for (x=0; x<column;x++)
{
// Blank scratchpads
fil3[x*3+0] = fil[x*3+0] = ((src[x] & 31) << 3);
fil3[x*3+1] = fil[x*3+1] = (((src[x] >> 5) & 63) << 2);
fil3[x*3+2] = fil[x*3+2] = (((src[x] >> 11) & 31) << 3);
}
/* filtering time */
for (x=1; x<column-3;x++)
{
fil3[(x+3)*3] = voodoo->thefilterb [((src[x+3] & 31) << 3)] [((src[x] & 31) << 3)];
fil3[(x+3)*3+1] = voodoo->thefilterg [(((src[x+3] >> 5) & 63) << 2)] [(((src[x] >> 5) & 63) << 2)];
fil3[(x+3)*3+2] = voodoo->thefilter [(((src[x+3] >> 11) & 31) << 3)] [(((src[x] >> 11) & 31) << 3)];
fil[(x+2)*3] = voodoo->thefilterb [fil3[(x+2)*3]][((src[x] & 31) << 3)];
fil[(x+2)*3+1] = voodoo->thefilterg [fil3[(x+2)*3+1]][(((src[x] >> 5) & 63) << 2)];
fil[(x+2)*3+2] = voodoo->thefilter [fil3[(x+2)*3+2]][(((src[x] >> 11) & 31) << 3)];
fil3[(x+1)*3] = voodoo->thefilterb [fil[(x+1)*3]][((src[x] & 31) << 3)];
fil3[(x+1)*3+1] = voodoo->thefilterg [fil[(x+1)*3+1]][(((src[x] >> 5) & 63) << 2)];
fil3[(x+1)*3+2] = voodoo->thefilter [fil[(x+1)*3+2]][(((src[x] >> 11) & 31) << 3)];
fil[(x-1)*3] = voodoo->thefilterb [fil3[(x-1)*3]][((src[x] & 31) << 3)];
fil[(x-1)*3+1] = voodoo->thefilterg [fil3[(x-1)*3+1]][(((src[x] >> 5) & 63) << 2)];
fil[(x-1)*3+2] = voodoo->thefilter [fil3[(x-1)*3+2]][(((src[x] >> 11) & 31) << 3)];
}
// unroll for edge cases
fil3[(column-3)*3] = voodoo->thefilterb [((src[column-3] & 31) << 3)] [((src[column] & 31) << 3)];
fil3[(column-3)*3+1] = voodoo->thefilterg [(((src[column-3] >> 5) & 63) << 2)] [(((src[column] >> 5) & 63) << 2)];
fil3[(column-3)*3+2] = voodoo->thefilter [(((src[column-3] >> 11) & 31) << 3)] [(((src[column] >> 11) & 31) << 3)];
fil3[(column-2)*3] = voodoo->thefilterb [((src[column-2] & 31) << 3)] [((src[column] & 31) << 3)];
fil3[(column-2)*3+1] = voodoo->thefilterg [(((src[column-2] >> 5) & 63) << 2)] [(((src[column] >> 5) & 63) << 2)];
fil3[(column-2)*3+2] = voodoo->thefilter [(((src[column-2] >> 11) & 31) << 3)] [(((src[column] >> 11) & 31) << 3)];
fil3[(column-1)*3] = voodoo->thefilterb [((src[column-1] & 31) << 3)] [((src[column] & 31) << 3)];
fil3[(column-1)*3+1] = voodoo->thefilterg [(((src[column-1] >> 5) & 63) << 2)] [(((src[column] >> 5) & 63) << 2)];
fil3[(column-1)*3+2] = voodoo->thefilter [(((src[column-1] >> 11) & 31) << 3)] [(((src[column] >> 11) & 31) << 3)];
fil[(column-2)*3] = voodoo->thefilterb [fil3[(column-2)*3]][((src[column] & 31) << 3)];
fil[(column-2)*3+1] = voodoo->thefilterg [fil3[(column-2)*3+1]][(((src[column] >> 5) & 63) << 2)];
fil[(column-2)*3+2] = voodoo->thefilter [fil3[(column-2)*3+2]][(((src[column] >> 11) & 31) << 3)];
fil[(column-1)*3] = voodoo->thefilterb [fil3[(column-1)*3]][((src[column] & 31) << 3)];
fil[(column-1)*3+1] = voodoo->thefilterg [fil3[(column-1)*3+1]][(((src[column] >> 5) & 63) << 2)];
fil[(column-1)*3+2] = voodoo->thefilter [fil3[(column-1)*3+2]][(((src[column] >> 11) & 31) << 3)];
fil3[(column-1)*3] = voodoo->thefilterb [fil[(column-1)*3]][((src[column] & 31) << 3)];
fil3[(column-1)*3+1] = voodoo->thefilterg [fil[(column-1)*3+1]][(((src[column] >> 5) & 63) << 2)];
fil3[(column-1)*3+2] = voodoo->thefilter [fil[(column-1)*3+2]][(((src[column] >> 11) & 31) << 3)];
}
void voodoo_callback(void *p)
{
voodoo_t *voodoo = (voodoo_t *)p;
if (voodoo->fbiInit0 & FBIINIT0_VGA_PASS)
{
if (voodoo->line < voodoo->v_disp)
{
voodoo_t *draw_voodoo;
int draw_line;
if (SLI_ENABLED)
{
if (voodoo == voodoo->set->voodoos[1])
goto skip_draw;
if (((voodoo->initEnable & INITENABLE_SLI_MASTER_SLAVE) ? 1 : 0) == (voodoo->line & 1))
draw_voodoo = voodoo;
else
draw_voodoo = voodoo->set->voodoos[1];
draw_line = voodoo->line >> 1;
}
else
{
if (!(voodoo->fbiInit0 & 1))
goto skip_draw;
draw_voodoo = voodoo;
draw_line = voodoo->line;
}
if (draw_voodoo->dirty_line[draw_line])
{
uint32_t *p = &((uint32_t *)buffer32->line[voodoo->line])[32];
uint16_t *src = (uint16_t *)&draw_voodoo->fb_mem[draw_voodoo->front_offset + draw_line*draw_voodoo->row_width];
int x;
draw_voodoo->dirty_line[draw_line] = 0;
if (voodoo->line < voodoo->dirty_line_low)
{
voodoo->dirty_line_low = voodoo->line;
video_wait_for_buffer();
}
if (voodoo->line > voodoo->dirty_line_high)
voodoo->dirty_line_high = voodoo->line;
if (voodoo->scrfilter && voodoo->scrfilterEnabled)
{
uint8_t fil[(voodoo->h_disp) * 3]; /* interleaved 24-bit RGB */
if (voodoo->type == VOODOO_2)
voodoo_filterline_v2(voodoo, fil, voodoo->h_disp, src, voodoo->line);
else
voodoo_filterline_v1(voodoo, fil, voodoo->h_disp, src, voodoo->line);
for (x = 0; x < voodoo->h_disp; x++)
{
p[x] = (voodoo->clutData256[fil[x*3]].b << 0 | voodoo->clutData256[fil[x*3+1]].g << 8 | voodoo->clutData256[fil[x*3+2]].r << 16);
}
}
else
{
for (x = 0; x < voodoo->h_disp; x++)
{
p[x] = draw_voodoo->video_16to32[src[x]];
}
}
}
}
}
skip_draw:
if (voodoo->line == voodoo->v_disp)
{
// voodoodisp_log("retrace %i %i %08x %i\n", voodoo->retrace_count, voodoo->swap_interval, voodoo->swap_offset, voodoo->swap_pending);
voodoo->retrace_count++;
if (SLI_ENABLED && (voodoo->fbiInit2 & FBIINIT2_SWAP_ALGORITHM_MASK) == FBIINIT2_SWAP_ALGORITHM_SLI_SYNC)
{
if (voodoo == voodoo->set->voodoos[0])
{
voodoo_t *voodoo_1 = voodoo->set->voodoos[1];
thread_wait_mutex(voodoo->swap_mutex);
/*Only swap if both Voodoos are waiting for buffer swap*/
if (voodoo->swap_pending && (voodoo->retrace_count > voodoo->swap_interval) &&
voodoo_1->swap_pending && (voodoo_1->retrace_count > voodoo_1->swap_interval))
{
memset(voodoo->dirty_line, 1, 1024);
voodoo->retrace_count = 0;
voodoo->front_offset = voodoo->swap_offset;
if (voodoo->swap_count > 0)
voodoo->swap_count--;
voodoo->swap_pending = 0;
memset(voodoo_1->dirty_line, 1, 1024);
voodoo_1->retrace_count = 0;
voodoo_1->front_offset = voodoo_1->swap_offset;
if (voodoo_1->swap_count > 0)
voodoo_1->swap_count--;
voodoo_1->swap_pending = 0;
thread_release_mutex(voodoo->swap_mutex);
thread_set_event(voodoo->wake_fifo_thread);
thread_set_event(voodoo_1->wake_fifo_thread);
voodoo->frame_count++;
voodoo_1->frame_count++;
}
else
thread_release_mutex(voodoo->swap_mutex);
}
}
else
{
thread_wait_mutex(voodoo->swap_mutex);
if (voodoo->swap_pending && (voodoo->retrace_count > voodoo->swap_interval))
{
voodoo->front_offset = voodoo->swap_offset;
if (voodoo->swap_count > 0)
voodoo->swap_count--;
voodoo->swap_pending = 0;
thread_release_mutex(voodoo->swap_mutex);
memset(voodoo->dirty_line, 1, 1024);
voodoo->retrace_count = 0;
thread_set_event(voodoo->wake_fifo_thread);
voodoo->frame_count++;
}
else
thread_release_mutex(voodoo->swap_mutex);
}
voodoo->v_retrace = 1;
}
voodoo->line++;
if (voodoo->fbiInit0 & FBIINIT0_VGA_PASS)
{
if (voodoo->line == voodoo->v_disp)
{
if (voodoo->dirty_line_high > voodoo->dirty_line_low)
svga_doblit(0, voodoo->v_disp, voodoo->h_disp, voodoo->v_disp-1, voodoo->svga);
if (voodoo->clutData_dirty)
{
voodoo->clutData_dirty = 0;
voodoo_calc_clutData(voodoo);
}
voodoo->dirty_line_high = -1;
voodoo->dirty_line_low = 2000;
}
}
if (voodoo->line >= voodoo->v_total)
{
voodoo->line = 0;
voodoo->v_retrace = 0;
}
if (voodoo->line_time)
timer_advance_u64(&voodoo->timer, voodoo->line_time);
else
timer_advance_u64(&voodoo->timer, TIMER_USEC * 32);
}
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