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86Box/src/video/vid_voodoo_display.c
OBattler ee7df06168 Voodoo: Honor monitor overscan.
2024-04-02 00:08:40 +02:00

668 lines
23 KiB
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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, <https://pcem-emulator.co.uk/>
*
* Copyright 2008-2020 Sarah Walker.
*/
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <wchar.h>
#include <math.h>
#define HAVE_STDARG_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/thread.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)
{
for (uint8_t tbl = 0; tbl < 2; tbl++) {
for (uint16_t col = 0; col < 256; col++) {
int y = (col >> 4);
int i = (col >> 2) & 3;
int q = col & 3;
int i_r;
int i_g;
int i_b;
int q_r;
int q_g;
int 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;
#if 0
r |= (r >> 5);
g |= (g >> 6);
b |= (b >> 5);
#endif
voodoo->video_16to32[c] = (voodoo->clutData256[r].r << 16) | (voodoo->clutData256[g].g << 8) | voodoo->clutData256[b].b;
}
}
#define FILTDIV 256
static int FILTCAP;
static int FILTCAPG;
static int FILTCAPB = 0; /* color filter threshold values */
void
voodoo_generate_filter_v1(voodoo_t *voodoo)
{
float difference;
float diffg;
float diffb;
float thiscol;
float thiscolg;
float thiscolb;
float lined;
float fcr;
float fcg;
float fcb;
fcr = FILTCAP * 5;
fcg = FILTCAPG * 6;
fcb = FILTCAPB * 5;
for (uint16_t g = 0; g < FILTDIV; g++) // pixel 1
{
for (uint16_t 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)
{
float difference;
float thiscol;
float thiscolg;
float thiscolb;
float clr;
float clg;
float clb = 0;
float fcr;
float fcg;
float 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 (uint16_t g = 0; g < 256; g++) // pixel 1 - our target pixel we want to bleed into
{
for (uint16_t 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;
int g;
int 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)
{
// Scratchpad for avoiding feedback streaks
uint8_t fil3[4096 * 3];
assert(voodoo->h_disp <= 4096);
/* 16 to 32-bit */
for (int 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 (int 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 (int 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 (int 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 (int 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 (int 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, UNUSED(int line))
{
int x;
// Scratchpad for blending filter
uint8_t fil3[4096 * 3];
assert(voodoo->h_disp <= 4096);
/* 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 *priv)
{
voodoo_t *voodoo = (voodoo_t *) priv;
const monitor_t *monitor = &monitors[voodoo->monitor_index];
int v_y_add = (monitor->mon_overscan_y >> 1);
int v_x_add = (monitor->mon_overscan_x >> 1);
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 = &monitor->target_buffer->line[voodoo->line + v_y_add][v_x_add];
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_monitor(voodoo->monitor_index);
}
if (voodoo->line > voodoo->dirty_line_high)
voodoo->dirty_line_high = voodoo->line;
/* Draw left overscan. */
for (x = 0; x < v_x_add; x++)
monitor->target_buffer->line[voodoo->line + v_y_add][x] = 0x00000000;
if (voodoo->scrfilter && voodoo->scrfilterEnabled) {
uint8_t fil[4096 * 3]; /* interleaved 24-bit RGB */
assert(voodoo->h_disp <= 4096);
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]];
}
}
/* Draw right overscan. */
for (x = 0; x < v_x_add; x++)
monitor->target_buffer->line[voodoo->line + v_y_add][voodoo->h_disp + x + v_x_add] =
0x00000000;
}
}
}
skip_draw:
if (voodoo->line == voodoo->v_disp) {
#if 0
voodoodisp_log("retrace %i %i %08x %i\n", voodoo->retrace_count, voodoo->swap_interval, voodoo->swap_offset, voodoo->swap_pending);
#endif
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) {
int force_blit = 0;
thread_wait_mutex(voodoo->force_blit_mutex);
if (voodoo->force_blit_count) {
force_blit = 1;
if (--voodoo->force_blit_count < 0)
voodoo->force_blit_count = 0;
}
thread_release_mutex(voodoo->force_blit_mutex);
if (voodoo->dirty_line_high > voodoo->dirty_line_low || force_blit)
svga_doblit(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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