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xemu/hw/vga.c
Jan Kiszka f065aa0a00 vga: Silence bogus gcc warning about uninitialized variables 
Some gcc versions do not properly detect that all possible cases are
covered and base and size are always initialized. Please gcc by defining
a pseudo default case.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-08-25 13:56:54 -05:00

2404 lines
68 KiB
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/*
* QEMU VGA Emulator.
*
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "console.h"
#include "pc.h"
#include "pci.h"
#include "vga_int.h"
#include "pixel_ops.h"
#include "qemu-timer.h"
//#define DEBUG_VGA
//#define DEBUG_VGA_MEM
//#define DEBUG_VGA_REG
//#define DEBUG_BOCHS_VBE
/* force some bits to zero */
const uint8_t sr_mask[8] = {
0x03,
0x3d,
0x0f,
0x3f,
0x0e,
0x00,
0x00,
0xff,
};
const uint8_t gr_mask[16] = {
0x0f, /* 0x00 */
0x0f, /* 0x01 */
0x0f, /* 0x02 */
0x1f, /* 0x03 */
0x03, /* 0x04 */
0x7b, /* 0x05 */
0x0f, /* 0x06 */
0x0f, /* 0x07 */
0xff, /* 0x08 */
0x00, /* 0x09 */
0x00, /* 0x0a */
0x00, /* 0x0b */
0x00, /* 0x0c */
0x00, /* 0x0d */
0x00, /* 0x0e */
0x00, /* 0x0f */
};
#define cbswap_32(__x) \
((uint32_t)( \
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
#ifdef HOST_WORDS_BIGENDIAN
#define PAT(x) cbswap_32(x)
#else
#define PAT(x) (x)
#endif
#ifdef HOST_WORDS_BIGENDIAN
#define BIG 1
#else
#define BIG 0
#endif
#ifdef HOST_WORDS_BIGENDIAN
#define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff)
#else
#define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff)
#endif
static const uint32_t mask16[16] = {
PAT(0x00000000),
PAT(0x000000ff),
PAT(0x0000ff00),
PAT(0x0000ffff),
PAT(0x00ff0000),
PAT(0x00ff00ff),
PAT(0x00ffff00),
PAT(0x00ffffff),
PAT(0xff000000),
PAT(0xff0000ff),
PAT(0xff00ff00),
PAT(0xff00ffff),
PAT(0xffff0000),
PAT(0xffff00ff),
PAT(0xffffff00),
PAT(0xffffffff),
};
#undef PAT
#ifdef HOST_WORDS_BIGENDIAN
#define PAT(x) (x)
#else
#define PAT(x) cbswap_32(x)
#endif
static const uint32_t dmask16[16] = {
PAT(0x00000000),
PAT(0x000000ff),
PAT(0x0000ff00),
PAT(0x0000ffff),
PAT(0x00ff0000),
PAT(0x00ff00ff),
PAT(0x00ffff00),
PAT(0x00ffffff),
PAT(0xff000000),
PAT(0xff0000ff),
PAT(0xff00ff00),
PAT(0xff00ffff),
PAT(0xffff0000),
PAT(0xffff00ff),
PAT(0xffffff00),
PAT(0xffffffff),
};
static const uint32_t dmask4[4] = {
PAT(0x00000000),
PAT(0x0000ffff),
PAT(0xffff0000),
PAT(0xffffffff),
};
static uint32_t expand4[256];
static uint16_t expand2[256];
static uint8_t expand4to8[16];
static void vga_screen_dump(void *opaque, const char *filename);
static char *screen_dump_filename;
static DisplayChangeListener *screen_dump_dcl;
static void vga_update_memory_access(VGACommonState *s)
{
MemoryRegion *region, *old_region = s->chain4_alias;
target_phys_addr_t base, offset, size;
s->chain4_alias = NULL;
if ((s->sr[0x02] & 0xf) == 0xf && s->sr[0x04] & 0x08) {
offset = 0;
switch ((s->gr[6] >> 2) & 3) {
case 0:
base = 0xa0000;
size = 0x20000;
break;
case 1:
base = 0xa0000;
size = 0x10000;
offset = s->bank_offset;
break;
case 2:
base = 0xb0000;
size = 0x8000;
break;
case 3:
default:
base = 0xb8000;
size = 0x8000;
break;
}
region = g_malloc(sizeof(*region));
memory_region_init_alias(region, "vga.chain4", &s->vram, offset, size);
memory_region_add_subregion_overlap(s->legacy_address_space, base,
region, 2);
s->chain4_alias = region;
}
if (old_region) {
memory_region_del_subregion(s->legacy_address_space, old_region);
memory_region_destroy(old_region);
g_free(old_region);
s->plane_updated = 0xf;
}
}
static void vga_dumb_update_retrace_info(VGACommonState *s)
{
(void) s;
}
static void vga_precise_update_retrace_info(VGACommonState *s)
{
int htotal_chars;
int hretr_start_char;
int hretr_skew_chars;
int hretr_end_char;
int vtotal_lines;
int vretr_start_line;
int vretr_end_line;
int dots;
#if 0
int div2, sldiv2;
#endif
int clocking_mode;
int clock_sel;
const int clk_hz[] = {25175000, 28322000, 25175000, 25175000};
int64_t chars_per_sec;
struct vga_precise_retrace *r = &s->retrace_info.precise;
htotal_chars = s->cr[0x00] + 5;
hretr_start_char = s->cr[0x04];
hretr_skew_chars = (s->cr[0x05] >> 5) & 3;
hretr_end_char = s->cr[0x05] & 0x1f;
vtotal_lines = (s->cr[0x06]
| (((s->cr[0x07] & 1) | ((s->cr[0x07] >> 4) & 2)) << 8)) + 2
;
vretr_start_line = s->cr[0x10]
| ((((s->cr[0x07] >> 2) & 1) | ((s->cr[0x07] >> 6) & 2)) << 8)
;
vretr_end_line = s->cr[0x11] & 0xf;
clocking_mode = (s->sr[0x01] >> 3) & 1;
clock_sel = (s->msr >> 2) & 3;
dots = (s->msr & 1) ? 8 : 9;
chars_per_sec = clk_hz[clock_sel] / dots;
htotal_chars <<= clocking_mode;
r->total_chars = vtotal_lines * htotal_chars;
if (r->freq) {
r->ticks_per_char = get_ticks_per_sec() / (r->total_chars * r->freq);
} else {
r->ticks_per_char = get_ticks_per_sec() / chars_per_sec;
}
r->vstart = vretr_start_line;
r->vend = r->vstart + vretr_end_line + 1;
r->hstart = hretr_start_char + hretr_skew_chars;
r->hend = r->hstart + hretr_end_char + 1;
r->htotal = htotal_chars;
#if 0
div2 = (s->cr[0x17] >> 2) & 1;
sldiv2 = (s->cr[0x17] >> 3) & 1;
printf (
"hz=%f\n"
"htotal = %d\n"
"hretr_start = %d\n"
"hretr_skew = %d\n"
"hretr_end = %d\n"
"vtotal = %d\n"
"vretr_start = %d\n"
"vretr_end = %d\n"
"div2 = %d sldiv2 = %d\n"
"clocking_mode = %d\n"
"clock_sel = %d %d\n"
"dots = %d\n"
"ticks/char = %" PRId64 "\n"
"\n",
(double) get_ticks_per_sec() / (r->ticks_per_char * r->total_chars),
htotal_chars,
hretr_start_char,
hretr_skew_chars,
hretr_end_char,
vtotal_lines,
vretr_start_line,
vretr_end_line,
div2, sldiv2,
clocking_mode,
clock_sel,
clk_hz[clock_sel],
dots,
r->ticks_per_char
);
#endif
}
static uint8_t vga_precise_retrace(VGACommonState *s)
{
struct vga_precise_retrace *r = &s->retrace_info.precise;
uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE);
if (r->total_chars) {
int cur_line, cur_line_char, cur_char;
int64_t cur_tick;
cur_tick = qemu_get_clock_ns(vm_clock);
cur_char = (cur_tick / r->ticks_per_char) % r->total_chars;
cur_line = cur_char / r->htotal;
if (cur_line >= r->vstart && cur_line <= r->vend) {
val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
} else {
cur_line_char = cur_char % r->htotal;
if (cur_line_char >= r->hstart && cur_line_char <= r->hend) {
val |= ST01_DISP_ENABLE;
}
}
return val;
} else {
return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
}
}
static uint8_t vga_dumb_retrace(VGACommonState *s)
{
return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
}
int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
{
if (s->msr & MSR_COLOR_EMULATION) {
/* Color */
return (addr >= 0x3b0 && addr <= 0x3bf);
} else {
/* Monochrome */
return (addr >= 0x3d0 && addr <= 0x3df);
}
}
uint32_t vga_ioport_read(void *opaque, uint32_t addr)
{
VGACommonState *s = opaque;
int val, index;
if (vga_ioport_invalid(s, addr)) {
val = 0xff;
} else {
switch(addr) {
case 0x3c0:
if (s->ar_flip_flop == 0) {
val = s->ar_index;
} else {
val = 0;
}
break;
case 0x3c1:
index = s->ar_index & 0x1f;
if (index < 21)
val = s->ar[index];
else
val = 0;
break;
case 0x3c2:
val = s->st00;
break;
case 0x3c4:
val = s->sr_index;
break;
case 0x3c5:
val = s->sr[s->sr_index];
#ifdef DEBUG_VGA_REG
printf("vga: read SR%x = 0x%02x\n", s->sr_index, val);
#endif
break;
case 0x3c7:
val = s->dac_state;
break;
case 0x3c8:
val = s->dac_write_index;
break;
case 0x3c9:
val = s->palette[s->dac_read_index * 3 + s->dac_sub_index];
if (++s->dac_sub_index == 3) {
s->dac_sub_index = 0;
s->dac_read_index++;
}
break;
case 0x3ca:
val = s->fcr;
break;
case 0x3cc:
val = s->msr;
break;
case 0x3ce:
val = s->gr_index;
break;
case 0x3cf:
val = s->gr[s->gr_index];
#ifdef DEBUG_VGA_REG
printf("vga: read GR%x = 0x%02x\n", s->gr_index, val);
#endif
break;
case 0x3b4:
case 0x3d4:
val = s->cr_index;
break;
case 0x3b5:
case 0x3d5:
val = s->cr[s->cr_index];
#ifdef DEBUG_VGA_REG
printf("vga: read CR%x = 0x%02x\n", s->cr_index, val);
#endif
break;
case 0x3ba:
case 0x3da:
/* just toggle to fool polling */
val = s->st01 = s->retrace(s);
s->ar_flip_flop = 0;
break;
default:
val = 0x00;
break;
}
}
#if defined(DEBUG_VGA)
printf("VGA: read addr=0x%04x data=0x%02x\n", addr, val);
#endif
return val;
}
void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
VGACommonState *s = opaque;
int index;
/* check port range access depending on color/monochrome mode */
if (vga_ioport_invalid(s, addr)) {
return;
}
#ifdef DEBUG_VGA
printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
#endif
switch(addr) {
case 0x3c0:
if (s->ar_flip_flop == 0) {
val &= 0x3f;
s->ar_index = val;
} else {
index = s->ar_index & 0x1f;
switch(index) {
case 0x00 ... 0x0f:
s->ar[index] = val & 0x3f;
break;
case 0x10:
s->ar[index] = val & ~0x10;
break;
case 0x11:
s->ar[index] = val;
break;
case 0x12:
s->ar[index] = val & ~0xc0;
break;
case 0x13:
s->ar[index] = val & ~0xf0;
break;
case 0x14:
s->ar[index] = val & ~0xf0;
break;
default:
break;
}
}
s->ar_flip_flop ^= 1;
break;
case 0x3c2:
s->msr = val & ~0x10;
s->update_retrace_info(s);
break;
case 0x3c4:
s->sr_index = val & 7;
break;
case 0x3c5:
#ifdef DEBUG_VGA_REG
printf("vga: write SR%x = 0x%02x\n", s->sr_index, val);
#endif
s->sr[s->sr_index] = val & sr_mask[s->sr_index];
if (s->sr_index == 1) s->update_retrace_info(s);
vga_update_memory_access(s);
break;
case 0x3c7:
s->dac_read_index = val;
s->dac_sub_index = 0;
s->dac_state = 3;
break;
case 0x3c8:
s->dac_write_index = val;
s->dac_sub_index = 0;
s->dac_state = 0;
break;
case 0x3c9:
s->dac_cache[s->dac_sub_index] = val;
if (++s->dac_sub_index == 3) {
memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3);
s->dac_sub_index = 0;
s->dac_write_index++;
}
break;
case 0x3ce:
s->gr_index = val & 0x0f;
break;
case 0x3cf:
#ifdef DEBUG_VGA_REG
printf("vga: write GR%x = 0x%02x\n", s->gr_index, val);
#endif
s->gr[s->gr_index] = val & gr_mask[s->gr_index];
vga_update_memory_access(s);
break;
case 0x3b4:
case 0x3d4:
s->cr_index = val;
break;
case 0x3b5:
case 0x3d5:
#ifdef DEBUG_VGA_REG
printf("vga: write CR%x = 0x%02x\n", s->cr_index, val);
#endif
/* handle CR0-7 protection */
if ((s->cr[0x11] & 0x80) && s->cr_index <= 7) {
/* can always write bit 4 of CR7 */
if (s->cr_index == 7)
s->cr[7] = (s->cr[7] & ~0x10) | (val & 0x10);
return;
}
s->cr[s->cr_index] = val;
switch(s->cr_index) {
case 0x00:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x11:
case 0x17:
s->update_retrace_info(s);
break;
}
break;
case 0x3ba:
case 0x3da:
s->fcr = val & 0x10;
break;
}
}
#ifdef CONFIG_BOCHS_VBE
static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr)
{
VGACommonState *s = opaque;
uint32_t val;
val = s->vbe_index;
return val;
}
static uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr)
{
VGACommonState *s = opaque;
uint32_t val;
if (s->vbe_index < VBE_DISPI_INDEX_NB) {
if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) {
switch(s->vbe_index) {
/* XXX: do not hardcode ? */
case VBE_DISPI_INDEX_XRES:
val = VBE_DISPI_MAX_XRES;
break;
case VBE_DISPI_INDEX_YRES:
val = VBE_DISPI_MAX_YRES;
break;
case VBE_DISPI_INDEX_BPP:
val = VBE_DISPI_MAX_BPP;
break;
default:
val = s->vbe_regs[s->vbe_index];
break;
}
} else {
val = s->vbe_regs[s->vbe_index];
}
} else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) {
val = s->vram_size / (64 * 1024);
} else {
val = 0;
}
#ifdef DEBUG_BOCHS_VBE
printf("VBE: read index=0x%x val=0x%x\n", s->vbe_index, val);
#endif
return val;
}
static void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val)
{
VGACommonState *s = opaque;
s->vbe_index = val;
}
static void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
{
VGACommonState *s = opaque;
if (s->vbe_index <= VBE_DISPI_INDEX_NB) {
#ifdef DEBUG_BOCHS_VBE
printf("VBE: write index=0x%x val=0x%x\n", s->vbe_index, val);
#endif
switch(s->vbe_index) {
case VBE_DISPI_INDEX_ID:
if (val == VBE_DISPI_ID0 ||
val == VBE_DISPI_ID1 ||
val == VBE_DISPI_ID2 ||
val == VBE_DISPI_ID3 ||
val == VBE_DISPI_ID4) {
s->vbe_regs[s->vbe_index] = val;
}
break;
case VBE_DISPI_INDEX_XRES:
if ((val <= VBE_DISPI_MAX_XRES) && ((val & 7) == 0)) {
s->vbe_regs[s->vbe_index] = val;
}
break;
case VBE_DISPI_INDEX_YRES:
if (val <= VBE_DISPI_MAX_YRES) {
s->vbe_regs[s->vbe_index] = val;
}
break;
case VBE_DISPI_INDEX_BPP:
if (val == 0)
val = 8;
if (val == 4 || val == 8 || val == 15 ||
val == 16 || val == 24 || val == 32) {
s->vbe_regs[s->vbe_index] = val;
}
break;
case VBE_DISPI_INDEX_BANK:
if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
val &= (s->vbe_bank_mask >> 2);
} else {
val &= s->vbe_bank_mask;
}
s->vbe_regs[s->vbe_index] = val;
s->bank_offset = (val << 16);
vga_update_memory_access(s);
break;
case VBE_DISPI_INDEX_ENABLE:
if ((val & VBE_DISPI_ENABLED) &&
!(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
int h, shift_control;
s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] =
s->vbe_regs[VBE_DISPI_INDEX_XRES];
s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] =
s->vbe_regs[VBE_DISPI_INDEX_YRES];
s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0;
s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0;
if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 1;
else
s->vbe_line_offset = s->vbe_regs[VBE_DISPI_INDEX_XRES] *
((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
s->vbe_start_addr = 0;
/* clear the screen (should be done in BIOS) */
if (!(val & VBE_DISPI_NOCLEARMEM)) {
memset(s->vram_ptr, 0,
s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset);
}
/* we initialize the VGA graphic mode (should be done
in BIOS) */
s->gr[0x06] = (s->gr[0x06] & ~0x0c) | 0x05; /* graphic mode + memory map 1 */
s->cr[0x17] |= 3; /* no CGA modes */
s->cr[0x13] = s->vbe_line_offset >> 3;
/* width */
s->cr[0x01] = (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1;
/* height (only meaningful if < 1024) */
h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1;
s->cr[0x12] = h;
s->cr[0x07] = (s->cr[0x07] & ~0x42) |
((h >> 7) & 0x02) | ((h >> 3) & 0x40);
/* line compare to 1023 */
s->cr[0x18] = 0xff;
s->cr[0x07] |= 0x10;
s->cr[0x09] |= 0x40;
if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) {
shift_control = 0;
s->sr[0x01] &= ~8; /* no double line */
} else {
shift_control = 2;
s->sr[4] |= 0x08; /* set chain 4 mode */
s->sr[2] |= 0x0f; /* activate all planes */
}
s->gr[0x05] = (s->gr[0x05] & ~0x60) | (shift_control << 5);
s->cr[0x09] &= ~0x9f; /* no double scan */
} else {
/* XXX: the bios should do that */
s->bank_offset = 0;
}
s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0;
s->vbe_regs[s->vbe_index] = val;
vga_update_memory_access(s);
break;
case VBE_DISPI_INDEX_VIRT_WIDTH:
{
int w, h, line_offset;
if (val < s->vbe_regs[VBE_DISPI_INDEX_XRES])
return;
w = val;
if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
line_offset = w >> 1;
else
line_offset = w * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
h = s->vram_size / line_offset;
/* XXX: support weird bochs semantics ? */
if (h < s->vbe_regs[VBE_DISPI_INDEX_YRES])
return;
s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = w;
s->vbe_regs[VBE_DISPI_INDEX_VIRT_HEIGHT] = h;
s->vbe_line_offset = line_offset;
}
break;
case VBE_DISPI_INDEX_X_OFFSET:
case VBE_DISPI_INDEX_Y_OFFSET:
{
int x;
s->vbe_regs[s->vbe_index] = val;
s->vbe_start_addr = s->vbe_line_offset * s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET];
x = s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET];
if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4)
s->vbe_start_addr += x >> 1;
else
s->vbe_start_addr += x * ((s->vbe_regs[VBE_DISPI_INDEX_BPP] + 7) >> 3);
s->vbe_start_addr >>= 2;
}
break;
default:
break;
}
}
}
#endif
/* called for accesses between 0xa0000 and 0xc0000 */
uint32_t vga_mem_readb(VGACommonState *s, target_phys_addr_t addr)
{
int memory_map_mode, plane;
uint32_t ret;
/* convert to VGA memory offset */
memory_map_mode = (s->gr[6] >> 2) & 3;
addr &= 0x1ffff;
switch(memory_map_mode) {
case 0:
break;
case 1:
if (addr >= 0x10000)
return 0xff;
addr += s->bank_offset;
break;
case 2:
addr -= 0x10000;
if (addr >= 0x8000)
return 0xff;
break;
default:
case 3:
addr -= 0x18000;
if (addr >= 0x8000)
return 0xff;
break;
}
if (s->sr[4] & 0x08) {
/* chain 4 mode : simplest access */
ret = s->vram_ptr[addr];
} else if (s->gr[5] & 0x10) {
/* odd/even mode (aka text mode mapping) */
plane = (s->gr[4] & 2) | (addr & 1);
ret = s->vram_ptr[((addr & ~1) << 1) | plane];
} else {
/* standard VGA latched access */
s->latch = ((uint32_t *)s->vram_ptr)[addr];
if (!(s->gr[5] & 0x08)) {
/* read mode 0 */
plane = s->gr[4];
ret = GET_PLANE(s->latch, plane);
} else {
/* read mode 1 */
ret = (s->latch ^ mask16[s->gr[2]]) & mask16[s->gr[7]];
ret |= ret >> 16;
ret |= ret >> 8;
ret = (~ret) & 0xff;
}
}
return ret;
}
/* called for accesses between 0xa0000 and 0xc0000 */
void vga_mem_writeb(VGACommonState *s, target_phys_addr_t addr, uint32_t val)
{
int memory_map_mode, plane, write_mode, b, func_select, mask;
uint32_t write_mask, bit_mask, set_mask;
#ifdef DEBUG_VGA_MEM
printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val);
#endif
/* convert to VGA memory offset */
memory_map_mode = (s->gr[6] >> 2) & 3;
addr &= 0x1ffff;
switch(memory_map_mode) {
case 0:
break;
case 1:
if (addr >= 0x10000)
return;
addr += s->bank_offset;
break;
case 2:
addr -= 0x10000;
if (addr >= 0x8000)
return;
break;
default:
case 3:
addr -= 0x18000;
if (addr >= 0x8000)
return;
break;
}
if (s->sr[4] & 0x08) {
/* chain 4 mode : simplest access */
plane = addr & 3;
mask = (1 << plane);
if (s->sr[2] & mask) {
s->vram_ptr[addr] = val;
#ifdef DEBUG_VGA_MEM
printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr);
#endif
s->plane_updated |= mask; /* only used to detect font change */
memory_region_set_dirty(&s->vram, addr);
}
} else if (s->gr[5] & 0x10) {
/* odd/even mode (aka text mode mapping) */
plane = (s->gr[4] & 2) | (addr & 1);
mask = (1 << plane);
if (s->sr[2] & mask) {
addr = ((addr & ~1) << 1) | plane;
s->vram_ptr[addr] = val;
#ifdef DEBUG_VGA_MEM
printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr);
#endif
s->plane_updated |= mask; /* only used to detect font change */
memory_region_set_dirty(&s->vram, addr);
}
} else {
/* standard VGA latched access */
write_mode = s->gr[5] & 3;
switch(write_mode) {
default:
case 0:
/* rotate */
b = s->gr[3] & 7;
val = ((val >> b) | (val << (8 - b))) & 0xff;
val |= val << 8;
val |= val << 16;
/* apply set/reset mask */
set_mask = mask16[s->gr[1]];
val = (val & ~set_mask) | (mask16[s->gr[0]] & set_mask);
bit_mask = s->gr[8];
break;
case 1:
val = s->latch;
goto do_write;
case 2:
val = mask16[val & 0x0f];
bit_mask = s->gr[8];
break;
case 3:
/* rotate */
b = s->gr[3] & 7;
val = (val >> b) | (val << (8 - b));
bit_mask = s->gr[8] & val;
val = mask16[s->gr[0]];
break;
}
/* apply logical operation */
func_select = s->gr[3] >> 3;
switch(func_select) {
case 0:
default:
/* nothing to do */
break;
case 1:
/* and */
val &= s->latch;
break;
case 2:
/* or */
val |= s->latch;
break;
case 3:
/* xor */
val ^= s->latch;
break;
}
/* apply bit mask */
bit_mask |= bit_mask << 8;
bit_mask |= bit_mask << 16;
val = (val & bit_mask) | (s->latch & ~bit_mask);
do_write:
/* mask data according to sr[2] */
mask = s->sr[2];
s->plane_updated |= mask; /* only used to detect font change */
write_mask = mask16[mask];
((uint32_t *)s->vram_ptr)[addr] =
(((uint32_t *)s->vram_ptr)[addr] & ~write_mask) |
(val & write_mask);
#ifdef DEBUG_VGA_MEM
printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n",
addr * 4, write_mask, val);
#endif
memory_region_set_dirty(&s->vram, addr << 2);
}
}
typedef void vga_draw_glyph8_func(uint8_t *d, int linesize,
const uint8_t *font_ptr, int h,
uint32_t fgcol, uint32_t bgcol);
typedef void vga_draw_glyph9_func(uint8_t *d, int linesize,
const uint8_t *font_ptr, int h,
uint32_t fgcol, uint32_t bgcol, int dup9);
typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d,
const uint8_t *s, int width);
#define DEPTH 8
#include "vga_template.h"
#define DEPTH 15
#include "vga_template.h"
#define BGR_FORMAT
#define DEPTH 15
#include "vga_template.h"
#define DEPTH 16
#include "vga_template.h"
#define BGR_FORMAT
#define DEPTH 16
#include "vga_template.h"
#define DEPTH 32
#include "vga_template.h"
#define BGR_FORMAT
#define DEPTH 32
#include "vga_template.h"
static unsigned int rgb_to_pixel8_dup(unsigned int r, unsigned int g, unsigned b)
{
unsigned int col;
col = rgb_to_pixel8(r, g, b);
col |= col << 8;
col |= col << 16;
return col;
}
static unsigned int rgb_to_pixel15_dup(unsigned int r, unsigned int g, unsigned b)
{
unsigned int col;
col = rgb_to_pixel15(r, g, b);
col |= col << 16;
return col;
}
static unsigned int rgb_to_pixel15bgr_dup(unsigned int r, unsigned int g,
unsigned int b)
{
unsigned int col;
col = rgb_to_pixel15bgr(r, g, b);
col |= col << 16;
return col;
}
static unsigned int rgb_to_pixel16_dup(unsigned int r, unsigned int g, unsigned b)
{
unsigned int col;
col = rgb_to_pixel16(r, g, b);
col |= col << 16;
return col;
}
static unsigned int rgb_to_pixel16bgr_dup(unsigned int r, unsigned int g,
unsigned int b)
{
unsigned int col;
col = rgb_to_pixel16bgr(r, g, b);
col |= col << 16;
return col;
}
static unsigned int rgb_to_pixel32_dup(unsigned int r, unsigned int g, unsigned b)
{
unsigned int col;
col = rgb_to_pixel32(r, g, b);
return col;
}
static unsigned int rgb_to_pixel32bgr_dup(unsigned int r, unsigned int g, unsigned b)
{
unsigned int col;
col = rgb_to_pixel32bgr(r, g, b);
return col;
}
/* return true if the palette was modified */
static int update_palette16(VGACommonState *s)
{
int full_update, i;
uint32_t v, col, *palette;
full_update = 0;
palette = s->last_palette;
for(i = 0; i < 16; i++) {
v = s->ar[i];
if (s->ar[0x10] & 0x80)
v = ((s->ar[0x14] & 0xf) << 4) | (v & 0xf);
else
v = ((s->ar[0x14] & 0xc) << 4) | (v & 0x3f);
v = v * 3;
col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
c6_to_8(s->palette[v + 1]),
c6_to_8(s->palette[v + 2]));
if (col != palette[i]) {
full_update = 1;
palette[i] = col;
}
}
return full_update;
}
/* return true if the palette was modified */
static int update_palette256(VGACommonState *s)
{
int full_update, i;
uint32_t v, col, *palette;
full_update = 0;
palette = s->last_palette;
v = 0;
for(i = 0; i < 256; i++) {
if (s->dac_8bit) {
col = s->rgb_to_pixel(s->palette[v],
s->palette[v + 1],
s->palette[v + 2]);
} else {
col = s->rgb_to_pixel(c6_to_8(s->palette[v]),
c6_to_8(s->palette[v + 1]),
c6_to_8(s->palette[v + 2]));
}
if (col != palette[i]) {
full_update = 1;
palette[i] = col;
}
v += 3;
}
return full_update;
}
static void vga_get_offsets(VGACommonState *s,
uint32_t *pline_offset,
uint32_t *pstart_addr,
uint32_t *pline_compare)
{
uint32_t start_addr, line_offset, line_compare;
#ifdef CONFIG_BOCHS_VBE
if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
line_offset = s->vbe_line_offset;
start_addr = s->vbe_start_addr;
line_compare = 65535;
} else
#endif
{
/* compute line_offset in bytes */
line_offset = s->cr[0x13];
line_offset <<= 3;
/* starting address */
start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8);
/* line compare */
line_compare = s->cr[0x18] |
((s->cr[0x07] & 0x10) << 4) |
((s->cr[0x09] & 0x40) << 3);
}
*pline_offset = line_offset;
*pstart_addr = start_addr;
*pline_compare = line_compare;
}
/* update start_addr and line_offset. Return TRUE if modified */
static int update_basic_params(VGACommonState *s)
{
int full_update;
uint32_t start_addr, line_offset, line_compare;
full_update = 0;
s->get_offsets(s, &line_offset, &start_addr, &line_compare);
if (line_offset != s->line_offset ||
start_addr != s->start_addr ||
line_compare != s->line_compare) {
s->line_offset = line_offset;
s->start_addr = start_addr;
s->line_compare = line_compare;
full_update = 1;
}
return full_update;
}
#define NB_DEPTHS 7
static inline int get_depth_index(DisplayState *s)
{
switch(ds_get_bits_per_pixel(s)) {
default:
case 8:
return 0;
case 15:
return 1;
case 16:
return 2;
case 32:
if (is_surface_bgr(s->surface))
return 4;
else
return 3;
}
}
static vga_draw_glyph8_func * const vga_draw_glyph8_table[NB_DEPTHS] = {
vga_draw_glyph8_8,
vga_draw_glyph8_16,
vga_draw_glyph8_16,
vga_draw_glyph8_32,
vga_draw_glyph8_32,
vga_draw_glyph8_16,
vga_draw_glyph8_16,
};
static vga_draw_glyph8_func * const vga_draw_glyph16_table[NB_DEPTHS] = {
vga_draw_glyph16_8,
vga_draw_glyph16_16,
vga_draw_glyph16_16,
vga_draw_glyph16_32,
vga_draw_glyph16_32,
vga_draw_glyph16_16,
vga_draw_glyph16_16,
};
static vga_draw_glyph9_func * const vga_draw_glyph9_table[NB_DEPTHS] = {
vga_draw_glyph9_8,
vga_draw_glyph9_16,
vga_draw_glyph9_16,
vga_draw_glyph9_32,
vga_draw_glyph9_32,
vga_draw_glyph9_16,
vga_draw_glyph9_16,
};
static const uint8_t cursor_glyph[32 * 4] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight,
int *pcwidth, int *pcheight)
{
int width, cwidth, height, cheight;
/* total width & height */
cheight = (s->cr[9] & 0x1f) + 1;
cwidth = 8;
if (!(s->sr[1] & 0x01))
cwidth = 9;
if (s->sr[1] & 0x08)
cwidth = 16; /* NOTE: no 18 pixel wide */
width = (s->cr[0x01] + 1);
if (s->cr[0x06] == 100) {
/* ugly hack for CGA 160x100x16 - explain me the logic */
height = 100;
} else {
height = s->cr[0x12] |
((s->cr[0x07] & 0x02) << 7) |
((s->cr[0x07] & 0x40) << 3);
height = (height + 1) / cheight;
}
*pwidth = width;
*pheight = height;
*pcwidth = cwidth;
*pcheight = cheight;
}
typedef unsigned int rgb_to_pixel_dup_func(unsigned int r, unsigned int g, unsigned b);
static rgb_to_pixel_dup_func * const rgb_to_pixel_dup_table[NB_DEPTHS] = {
rgb_to_pixel8_dup,
rgb_to_pixel15_dup,
rgb_to_pixel16_dup,
rgb_to_pixel32_dup,
rgb_to_pixel32bgr_dup,
rgb_to_pixel15bgr_dup,
rgb_to_pixel16bgr_dup,
};
/*
* Text mode update
* Missing:
* - double scan
* - double width
* - underline
* - flashing
*/
static void vga_draw_text(VGACommonState *s, int full_update)
{
int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr;
int cx_min, cx_max, linesize, x_incr, line, line1;
uint32_t offset, fgcol, bgcol, v, cursor_offset;
uint8_t *d1, *d, *src, *dest, *cursor_ptr;
const uint8_t *font_ptr, *font_base[2];
int dup9, line_offset, depth_index;
uint32_t *palette;
uint32_t *ch_attr_ptr;
vga_draw_glyph8_func *vga_draw_glyph8;
vga_draw_glyph9_func *vga_draw_glyph9;
/* compute font data address (in plane 2) */
v = s->sr[3];
offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2;
if (offset != s->font_offsets[0]) {
s->font_offsets[0] = offset;
full_update = 1;
}
font_base[0] = s->vram_ptr + offset;
offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2;
font_base[1] = s->vram_ptr + offset;
if (offset != s->font_offsets[1]) {
s->font_offsets[1] = offset;
full_update = 1;
}
if (s->plane_updated & (1 << 2) || s->chain4_alias) {
/* if the plane 2 was modified since the last display, it
indicates the font may have been modified */
s->plane_updated = 0;
full_update = 1;
}
full_update |= update_basic_params(s);
line_offset = s->line_offset;
vga_get_text_resolution(s, &width, &height, &cw, &cheight);
if ((height * width) > CH_ATTR_SIZE) {
/* better than nothing: exit if transient size is too big */
return;
}
if (width != s->last_width || height != s->last_height ||
cw != s->last_cw || cheight != s->last_ch || s->last_depth) {
s->last_scr_width = width * cw;
s->last_scr_height = height * cheight;
qemu_console_resize(s->ds, s->last_scr_width, s->last_scr_height);
s->last_depth = 0;
s->last_width = width;
s->last_height = height;
s->last_ch = cheight;
s->last_cw = cw;
full_update = 1;
}
s->rgb_to_pixel =
rgb_to_pixel_dup_table[get_depth_index(s->ds)];
full_update |= update_palette16(s);
palette = s->last_palette;
x_incr = cw * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr;
if (cursor_offset != s->cursor_offset ||
s->cr[0xa] != s->cursor_start ||
s->cr[0xb] != s->cursor_end) {
/* if the cursor position changed, we update the old and new
chars */
if (s->cursor_offset < CH_ATTR_SIZE)
s->last_ch_attr[s->cursor_offset] = -1;
if (cursor_offset < CH_ATTR_SIZE)
s->last_ch_attr[cursor_offset] = -1;
s->cursor_offset = cursor_offset;
s->cursor_start = s->cr[0xa];
s->cursor_end = s->cr[0xb];
}
cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4;
depth_index = get_depth_index(s->ds);
if (cw == 16)
vga_draw_glyph8 = vga_draw_glyph16_table[depth_index];
else
vga_draw_glyph8 = vga_draw_glyph8_table[depth_index];
vga_draw_glyph9 = vga_draw_glyph9_table[depth_index];
dest = ds_get_data(s->ds);
linesize = ds_get_linesize(s->ds);
ch_attr_ptr = s->last_ch_attr;
line = 0;
offset = s->start_addr * 4;
for(cy = 0; cy < height; cy++) {
d1 = dest;
src = s->vram_ptr + offset;
cx_min = width;
cx_max = -1;
for(cx = 0; cx < width; cx++) {
ch_attr = *(uint16_t *)src;
if (full_update || ch_attr != *ch_attr_ptr) {
if (cx < cx_min)
cx_min = cx;
if (cx > cx_max)
cx_max = cx;
*ch_attr_ptr = ch_attr;
#ifdef HOST_WORDS_BIGENDIAN
ch = ch_attr >> 8;
cattr = ch_attr & 0xff;
#else
ch = ch_attr & 0xff;
cattr = ch_attr >> 8;
#endif
font_ptr = font_base[(cattr >> 3) & 1];
font_ptr += 32 * 4 * ch;
bgcol = palette[cattr >> 4];
fgcol = palette[cattr & 0x0f];
if (cw != 9) {
vga_draw_glyph8(d1, linesize,
font_ptr, cheight, fgcol, bgcol);
} else {
dup9 = 0;
if (ch >= 0xb0 && ch <= 0xdf && (s->ar[0x10] & 0x04))
dup9 = 1;
vga_draw_glyph9(d1, linesize,
font_ptr, cheight, fgcol, bgcol, dup9);
}
if (src == cursor_ptr &&
!(s->cr[0x0a] & 0x20)) {
int line_start, line_last, h;
/* draw the cursor */
line_start = s->cr[0x0a] & 0x1f;
line_last = s->cr[0x0b] & 0x1f;
/* XXX: check that */
if (line_last > cheight - 1)
line_last = cheight - 1;
if (line_last >= line_start && line_start < cheight) {
h = line_last - line_start + 1;
d = d1 + linesize * line_start;
if (cw != 9) {
vga_draw_glyph8(d, linesize,
cursor_glyph, h, fgcol, bgcol);
} else {
vga_draw_glyph9(d, linesize,
cursor_glyph, h, fgcol, bgcol, 1);
}
}
}
}
d1 += x_incr;
src += 4;
ch_attr_ptr++;
}
if (cx_max != -1) {
dpy_update(s->ds, cx_min * cw, cy * cheight,
(cx_max - cx_min + 1) * cw, cheight);
}
dest += linesize * cheight;
line1 = line + cheight;
offset += line_offset;
if (line < s->line_compare && line1 >= s->line_compare) {
offset = 0;
}
line = line1;
}
}
enum {
VGA_DRAW_LINE2,
VGA_DRAW_LINE2D2,
VGA_DRAW_LINE4,
VGA_DRAW_LINE4D2,
VGA_DRAW_LINE8D2,
VGA_DRAW_LINE8,
VGA_DRAW_LINE15,
VGA_DRAW_LINE16,
VGA_DRAW_LINE24,
VGA_DRAW_LINE32,
VGA_DRAW_LINE_NB,
};
static vga_draw_line_func * const vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_NB] = {
vga_draw_line2_8,
vga_draw_line2_16,
vga_draw_line2_16,
vga_draw_line2_32,
vga_draw_line2_32,
vga_draw_line2_16,
vga_draw_line2_16,
vga_draw_line2d2_8,
vga_draw_line2d2_16,
vga_draw_line2d2_16,
vga_draw_line2d2_32,
vga_draw_line2d2_32,
vga_draw_line2d2_16,
vga_draw_line2d2_16,
vga_draw_line4_8,
vga_draw_line4_16,
vga_draw_line4_16,
vga_draw_line4_32,
vga_draw_line4_32,
vga_draw_line4_16,
vga_draw_line4_16,
vga_draw_line4d2_8,
vga_draw_line4d2_16,
vga_draw_line4d2_16,
vga_draw_line4d2_32,
vga_draw_line4d2_32,
vga_draw_line4d2_16,
vga_draw_line4d2_16,
vga_draw_line8d2_8,
vga_draw_line8d2_16,
vga_draw_line8d2_16,
vga_draw_line8d2_32,
vga_draw_line8d2_32,
vga_draw_line8d2_16,
vga_draw_line8d2_16,
vga_draw_line8_8,
vga_draw_line8_16,
vga_draw_line8_16,
vga_draw_line8_32,
vga_draw_line8_32,
vga_draw_line8_16,
vga_draw_line8_16,
vga_draw_line15_8,
vga_draw_line15_15,
vga_draw_line15_16,
vga_draw_line15_32,
vga_draw_line15_32bgr,
vga_draw_line15_15bgr,
vga_draw_line15_16bgr,
vga_draw_line16_8,
vga_draw_line16_15,
vga_draw_line16_16,
vga_draw_line16_32,
vga_draw_line16_32bgr,
vga_draw_line16_15bgr,
vga_draw_line16_16bgr,
vga_draw_line24_8,
vga_draw_line24_15,
vga_draw_line24_16,
vga_draw_line24_32,
vga_draw_line24_32bgr,
vga_draw_line24_15bgr,
vga_draw_line24_16bgr,
vga_draw_line32_8,
vga_draw_line32_15,
vga_draw_line32_16,
vga_draw_line32_32,
vga_draw_line32_32bgr,
vga_draw_line32_15bgr,
vga_draw_line32_16bgr,
};
static int vga_get_bpp(VGACommonState *s)
{
int ret;
#ifdef CONFIG_BOCHS_VBE
if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
ret = s->vbe_regs[VBE_DISPI_INDEX_BPP];
} else
#endif
{
ret = 0;
}
return ret;
}
static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight)
{
int width, height;
#ifdef CONFIG_BOCHS_VBE
if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
width = s->vbe_regs[VBE_DISPI_INDEX_XRES];
height = s->vbe_regs[VBE_DISPI_INDEX_YRES];
} else
#endif
{
width = (s->cr[0x01] + 1) * 8;
height = s->cr[0x12] |
((s->cr[0x07] & 0x02) << 7) |
((s->cr[0x07] & 0x40) << 3);
height = (height + 1);
}
*pwidth = width;
*pheight = height;
}
void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2)
{
int y;
if (y1 >= VGA_MAX_HEIGHT)
return;
if (y2 >= VGA_MAX_HEIGHT)
y2 = VGA_MAX_HEIGHT;
for(y = y1; y < y2; y++) {
s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f);
}
}
static void vga_sync_dirty_bitmap(VGACommonState *s)
{
memory_region_sync_dirty_bitmap(&s->vram);
}
void vga_dirty_log_start(VGACommonState *s)
{
memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
}
void vga_dirty_log_stop(VGACommonState *s)
{
memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA);
}
/*
* graphic modes
*/
static void vga_draw_graphic(VGACommonState *s, int full_update)
{
int y1, y, update, linesize, y_start, double_scan, mask, depth;
int width, height, shift_control, line_offset, bwidth, bits;
ram_addr_t page0, page1, page_min, page_max;
int disp_width, multi_scan, multi_run;
uint8_t *d;
uint32_t v, addr1, addr;
vga_draw_line_func *vga_draw_line;
full_update |= update_basic_params(s);
if (!full_update)
vga_sync_dirty_bitmap(s);
s->get_resolution(s, &width, &height);
disp_width = width;
shift_control = (s->gr[0x05] >> 5) & 3;
double_scan = (s->cr[0x09] >> 7);
if (shift_control != 1) {
multi_scan = (((s->cr[0x09] & 0x1f) + 1) << double_scan) - 1;
} else {
/* in CGA modes, multi_scan is ignored */
/* XXX: is it correct ? */
multi_scan = double_scan;
}
multi_run = multi_scan;
if (shift_control != s->shift_control ||
double_scan != s->double_scan) {
full_update = 1;
s->shift_control = shift_control;
s->double_scan = double_scan;
}
if (shift_control == 0) {
if (s->sr[0x01] & 8) {
disp_width <<= 1;
}
} else if (shift_control == 1) {
if (s->sr[0x01] & 8) {
disp_width <<= 1;
}
}
depth = s->get_bpp(s);
if (s->line_offset != s->last_line_offset ||
disp_width != s->last_width ||
height != s->last_height ||
s->last_depth != depth) {
#if defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
if (depth == 16 || depth == 32) {
#else
if (depth == 32) {
#endif
qemu_free_displaysurface(s->ds);
s->ds->surface = qemu_create_displaysurface_from(disp_width, height, depth,
s->line_offset,
s->vram_ptr + (s->start_addr * 4));
#if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
s->ds->surface->pf = qemu_different_endianness_pixelformat(depth);
#endif
dpy_resize(s->ds);
} else {
qemu_console_resize(s->ds, disp_width, height);
}
s->last_scr_width = disp_width;
s->last_scr_height = height;
s->last_width = disp_width;
s->last_height = height;
s->last_line_offset = s->line_offset;
s->last_depth = depth;
full_update = 1;
} else if (is_buffer_shared(s->ds->surface) &&
(full_update || s->ds->surface->data != s->vram_ptr + (s->start_addr * 4))) {
s->ds->surface->data = s->vram_ptr + (s->start_addr * 4);
dpy_setdata(s->ds);
}
s->rgb_to_pixel =
rgb_to_pixel_dup_table[get_depth_index(s->ds)];
if (shift_control == 0) {
full_update |= update_palette16(s);
if (s->sr[0x01] & 8) {
v = VGA_DRAW_LINE4D2;
} else {
v = VGA_DRAW_LINE4;
}
bits = 4;
} else if (shift_control == 1) {
full_update |= update_palette16(s);
if (s->sr[0x01] & 8) {
v = VGA_DRAW_LINE2D2;
} else {
v = VGA_DRAW_LINE2;
}
bits = 4;
} else {
switch(s->get_bpp(s)) {
default:
case 0:
full_update |= update_palette256(s);
v = VGA_DRAW_LINE8D2;
bits = 4;
break;
case 8:
full_update |= update_palette256(s);
v = VGA_DRAW_LINE8;
bits = 8;
break;
case 15:
v = VGA_DRAW_LINE15;
bits = 16;
break;
case 16:
v = VGA_DRAW_LINE16;
bits = 16;
break;
case 24:
v = VGA_DRAW_LINE24;
bits = 24;
break;
case 32:
v = VGA_DRAW_LINE32;
bits = 32;
break;
}
}
vga_draw_line = vga_draw_line_table[v * NB_DEPTHS + get_depth_index(s->ds)];
if (!is_buffer_shared(s->ds->surface) && s->cursor_invalidate)
s->cursor_invalidate(s);
line_offset = s->line_offset;
#if 0
printf("w=%d h=%d v=%d line_offset=%d cr[0x09]=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=0x%02x\n",
width, height, v, line_offset, s->cr[9], s->cr[0x17], s->line_compare, s->sr[0x01]);
#endif
addr1 = (s->start_addr * 4);
bwidth = (width * bits + 7) / 8;
y_start = -1;
page_min = -1;
page_max = 0;
d = ds_get_data(s->ds);
linesize = ds_get_linesize(s->ds);
y1 = 0;
for(y = 0; y < height; y++) {
addr = addr1;
if (!(s->cr[0x17] & 1)) {
int shift;
/* CGA compatibility handling */
shift = 14 + ((s->cr[0x17] >> 6) & 1);
addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift);
}
if (!(s->cr[0x17] & 2)) {
addr = (addr & ~0x8000) | ((y1 & 2) << 14);
}
page0 = addr & TARGET_PAGE_MASK;
page1 = (addr + bwidth - 1) & TARGET_PAGE_MASK;
update = full_update |
memory_region_get_dirty(&s->vram, page0, DIRTY_MEMORY_VGA) |
memory_region_get_dirty(&s->vram, page1, DIRTY_MEMORY_VGA);
if ((page1 - page0) > TARGET_PAGE_SIZE) {
/* if wide line, can use another page */
update |= memory_region_get_dirty(&s->vram,
page0 + TARGET_PAGE_SIZE,
DIRTY_MEMORY_VGA);
}
/* explicit invalidation for the hardware cursor */
update |= (s->invalidated_y_table[y >> 5] >> (y & 0x1f)) & 1;
if (update) {
if (y_start < 0)
y_start = y;
if (page0 < page_min)
page_min = page0;
if (page1 > page_max)
page_max = page1;
if (!(is_buffer_shared(s->ds->surface))) {
vga_draw_line(s, d, s->vram_ptr + addr, width);
if (s->cursor_draw_line)
s->cursor_draw_line(s, d, y);
}
} else {
if (y_start >= 0) {
/* flush to display */
dpy_update(s->ds, 0, y_start,
disp_width, y - y_start);
y_start = -1;
}
}
if (!multi_run) {
mask = (s->cr[0x17] & 3) ^ 3;
if ((y1 & mask) == mask)
addr1 += line_offset;
y1++;
multi_run = multi_scan;
} else {
multi_run--;
}
/* line compare acts on the displayed lines */
if (y == s->line_compare)
addr1 = 0;
d += linesize;
}
if (y_start >= 0) {
/* flush to display */
dpy_update(s->ds, 0, y_start,
disp_width, y - y_start);
}
/* reset modified pages */
if (page_max >= page_min) {
memory_region_reset_dirty(&s->vram,
page_min,
page_max + TARGET_PAGE_SIZE - page_min,
DIRTY_MEMORY_VGA);
}
memset(s->invalidated_y_table, 0, ((height + 31) >> 5) * 4);
}
static void vga_draw_blank(VGACommonState *s, int full_update)
{
int i, w, val;
uint8_t *d;
if (!full_update)
return;
if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
return;
s->rgb_to_pixel =
rgb_to_pixel_dup_table[get_depth_index(s->ds)];
if (ds_get_bits_per_pixel(s->ds) == 8)
val = s->rgb_to_pixel(0, 0, 0);
else
val = 0;
w = s->last_scr_width * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
d = ds_get_data(s->ds);
for(i = 0; i < s->last_scr_height; i++) {
memset(d, val, w);
d += ds_get_linesize(s->ds);
}
dpy_update(s->ds, 0, 0,
s->last_scr_width, s->last_scr_height);
}
#define GMODE_TEXT 0
#define GMODE_GRAPH 1
#define GMODE_BLANK 2
static void vga_update_display(void *opaque)
{
VGACommonState *s = opaque;
int full_update, graphic_mode;
if (ds_get_bits_per_pixel(s->ds) == 0) {
/* nothing to do */
} else {
full_update = 0;
if (!(s->ar_index & 0x20)) {
graphic_mode = GMODE_BLANK;
} else {
graphic_mode = s->gr[6] & 1;
}
if (graphic_mode != s->graphic_mode) {
s->graphic_mode = graphic_mode;
full_update = 1;
}
switch(graphic_mode) {
case GMODE_TEXT:
vga_draw_text(s, full_update);
break;
case GMODE_GRAPH:
vga_draw_graphic(s, full_update);
break;
case GMODE_BLANK:
default:
vga_draw_blank(s, full_update);
break;
}
}
}
/* force a full display refresh */
static void vga_invalidate_display(void *opaque)
{
VGACommonState *s = opaque;
s->last_width = -1;
s->last_height = -1;
}
void vga_common_reset(VGACommonState *s)
{
s->sr_index = 0;
memset(s->sr, '\0', sizeof(s->sr));
s->gr_index = 0;
memset(s->gr, '\0', sizeof(s->gr));
s->ar_index = 0;
memset(s->ar, '\0', sizeof(s->ar));
s->ar_flip_flop = 0;
s->cr_index = 0;
memset(s->cr, '\0', sizeof(s->cr));
s->msr = 0;
s->fcr = 0;
s->st00 = 0;
s->st01 = 0;
s->dac_state = 0;
s->dac_sub_index = 0;
s->dac_read_index = 0;
s->dac_write_index = 0;
memset(s->dac_cache, '\0', sizeof(s->dac_cache));
s->dac_8bit = 0;
memset(s->palette, '\0', sizeof(s->palette));
s->bank_offset = 0;
#ifdef CONFIG_BOCHS_VBE
s->vbe_index = 0;
memset(s->vbe_regs, '\0', sizeof(s->vbe_regs));
s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5;
s->vbe_start_addr = 0;
s->vbe_line_offset = 0;
s->vbe_bank_mask = (s->vram_size >> 16) - 1;
#endif
memset(s->font_offsets, '\0', sizeof(s->font_offsets));
s->graphic_mode = -1; /* force full update */
s->shift_control = 0;
s->double_scan = 0;
s->line_offset = 0;
s->line_compare = 0;
s->start_addr = 0;
s->plane_updated = 0;
s->last_cw = 0;
s->last_ch = 0;
s->last_width = 0;
s->last_height = 0;
s->last_scr_width = 0;
s->last_scr_height = 0;
s->cursor_start = 0;
s->cursor_end = 0;
s->cursor_offset = 0;
memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
memset(s->last_palette, '\0', sizeof(s->last_palette));
memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
switch (vga_retrace_method) {
case VGA_RETRACE_DUMB:
break;
case VGA_RETRACE_PRECISE:
memset(&s->retrace_info, 0, sizeof (s->retrace_info));
break;
}
vga_update_memory_access(s);
}
static void vga_reset(void *opaque)
{
VGACommonState *s = opaque;
vga_common_reset(s);
}
#define TEXTMODE_X(x) ((x) % width)
#define TEXTMODE_Y(x) ((x) / width)
#define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \
((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1))
/* relay text rendering to the display driver
* instead of doing a full vga_update_display() */
static void vga_update_text(void *opaque, console_ch_t *chardata)
{
VGACommonState *s = opaque;
int graphic_mode, i, cursor_offset, cursor_visible;
int cw, cheight, width, height, size, c_min, c_max;
uint32_t *src;
console_ch_t *dst, val;
char msg_buffer[80];
int full_update = 0;
if (!(s->ar_index & 0x20)) {
graphic_mode = GMODE_BLANK;
} else {
graphic_mode = s->gr[6] & 1;
}
if (graphic_mode != s->graphic_mode) {
s->graphic_mode = graphic_mode;
full_update = 1;
}
if (s->last_width == -1) {
s->last_width = 0;
full_update = 1;
}
switch (graphic_mode) {
case GMODE_TEXT:
/* TODO: update palette */
full_update |= update_basic_params(s);
/* total width & height */
cheight = (s->cr[9] & 0x1f) + 1;
cw = 8;
if (!(s->sr[1] & 0x01))
cw = 9;
if (s->sr[1] & 0x08)
cw = 16; /* NOTE: no 18 pixel wide */
width = (s->cr[0x01] + 1);
if (s->cr[0x06] == 100) {
/* ugly hack for CGA 160x100x16 - explain me the logic */
height = 100;
} else {
height = s->cr[0x12] |
((s->cr[0x07] & 0x02) << 7) |
((s->cr[0x07] & 0x40) << 3);
height = (height + 1) / cheight;
}
size = (height * width);
if (size > CH_ATTR_SIZE) {
if (!full_update)
return;
snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode",
width, height);
break;
}
if (width != s->last_width || height != s->last_height ||
cw != s->last_cw || cheight != s->last_ch) {
s->last_scr_width = width * cw;
s->last_scr_height = height * cheight;
s->ds->surface->width = width;
s->ds->surface->height = height;
dpy_resize(s->ds);
s->last_width = width;
s->last_height = height;
s->last_ch = cheight;
s->last_cw = cw;
full_update = 1;
}
/* Update "hardware" cursor */
cursor_offset = ((s->cr[0x0e] << 8) | s->cr[0x0f]) - s->start_addr;
if (cursor_offset != s->cursor_offset ||
s->cr[0xa] != s->cursor_start ||
s->cr[0xb] != s->cursor_end || full_update) {
cursor_visible = !(s->cr[0xa] & 0x20);
if (cursor_visible && cursor_offset < size && cursor_offset >= 0)
dpy_cursor(s->ds,
TEXTMODE_X(cursor_offset),
TEXTMODE_Y(cursor_offset));
else
dpy_cursor(s->ds, -1, -1);
s->cursor_offset = cursor_offset;
s->cursor_start = s->cr[0xa];
s->cursor_end = s->cr[0xb];
}
src = (uint32_t *) s->vram_ptr + s->start_addr;
dst = chardata;
if (full_update) {
for (i = 0; i < size; src ++, dst ++, i ++)
console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src)));
dpy_update(s->ds, 0, 0, width, height);
} else {
c_max = 0;
for (i = 0; i < size; src ++, dst ++, i ++) {
console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
if (*dst != val) {
*dst = val;
c_max = i;
break;
}
}
c_min = i;
for (; i < size; src ++, dst ++, i ++) {
console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src)));
if (*dst != val) {
*dst = val;
c_max = i;
}
}
if (c_min <= c_max) {
i = TEXTMODE_Y(c_min);
dpy_update(s->ds, 0, i, width, TEXTMODE_Y(c_max) - i + 1);
}
}
return;
case GMODE_GRAPH:
if (!full_update)
return;
s->get_resolution(s, &width, &height);
snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode",
width, height);
break;
case GMODE_BLANK:
default:
if (!full_update)
return;
snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode");
break;
}
/* Display a message */
s->last_width = 60;
s->last_height = height = 3;
dpy_cursor(s->ds, -1, -1);
s->ds->surface->width = s->last_width;
s->ds->surface->height = height;
dpy_resize(s->ds);
for (dst = chardata, i = 0; i < s->last_width * height; i ++)
console_write_ch(dst ++, ' ');
size = strlen(msg_buffer);
width = (s->last_width - size) / 2;
dst = chardata + s->last_width + width;
for (i = 0; i < size; i ++)
console_write_ch(dst ++, 0x00200100 | msg_buffer[i]);
dpy_update(s->ds, 0, 0, s->last_width, height);
}
static uint64_t vga_mem_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
VGACommonState *s = opaque;
return vga_mem_readb(s, addr);
}
static void vga_mem_write(void *opaque, target_phys_addr_t addr,
uint64_t data, unsigned size)
{
VGACommonState *s = opaque;
return vga_mem_writeb(s, addr, data);
}
const MemoryRegionOps vga_mem_ops = {
.read = vga_mem_read,
.write = vga_mem_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
};
static int vga_common_post_load(void *opaque, int version_id)
{
VGACommonState *s = opaque;
/* force refresh */
s->graphic_mode = -1;
return 0;
}
const VMStateDescription vmstate_vga_common = {
.name = "vga",
.version_id = 2,
.minimum_version_id = 2,
.minimum_version_id_old = 2,
.post_load = vga_common_post_load,
.fields = (VMStateField []) {
VMSTATE_UINT32(latch, VGACommonState),
VMSTATE_UINT8(sr_index, VGACommonState),
VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8),
VMSTATE_UINT8(gr_index, VGACommonState),
VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16),
VMSTATE_UINT8(ar_index, VGACommonState),
VMSTATE_BUFFER(ar, VGACommonState),
VMSTATE_INT32(ar_flip_flop, VGACommonState),
VMSTATE_UINT8(cr_index, VGACommonState),
VMSTATE_BUFFER(cr, VGACommonState),
VMSTATE_UINT8(msr, VGACommonState),
VMSTATE_UINT8(fcr, VGACommonState),
VMSTATE_UINT8(st00, VGACommonState),
VMSTATE_UINT8(st01, VGACommonState),
VMSTATE_UINT8(dac_state, VGACommonState),
VMSTATE_UINT8(dac_sub_index, VGACommonState),
VMSTATE_UINT8(dac_read_index, VGACommonState),
VMSTATE_UINT8(dac_write_index, VGACommonState),
VMSTATE_BUFFER(dac_cache, VGACommonState),
VMSTATE_BUFFER(palette, VGACommonState),
VMSTATE_INT32(bank_offset, VGACommonState),
VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState),
#ifdef CONFIG_BOCHS_VBE
VMSTATE_UINT16(vbe_index, VGACommonState),
VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB),
VMSTATE_UINT32(vbe_start_addr, VGACommonState),
VMSTATE_UINT32(vbe_line_offset, VGACommonState),
VMSTATE_UINT32(vbe_bank_mask, VGACommonState),
#endif
VMSTATE_END_OF_LIST()
}
};
void vga_common_init(VGACommonState *s, int vga_ram_size)
{
int i, j, v, b;
for(i = 0;i < 256; i++) {
v = 0;
for(j = 0; j < 8; j++) {
v |= ((i >> j) & 1) << (j * 4);
}
expand4[i] = v;
v = 0;
for(j = 0; j < 4; j++) {
v |= ((i >> (2 * j)) & 3) << (j * 4);
}
expand2[i] = v;
}
for(i = 0; i < 16; i++) {
v = 0;
for(j = 0; j < 4; j++) {
b = ((i >> j) & 1);
v |= b << (2 * j);
v |= b << (2 * j + 1);
}
expand4to8[i] = v;
}
#ifdef CONFIG_BOCHS_VBE
s->is_vbe_vmstate = 1;
#else
s->is_vbe_vmstate = 0;
#endif
memory_region_init_ram(&s->vram, NULL, "vga.vram", vga_ram_size);
s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
s->vram_size = vga_ram_size;
s->get_bpp = vga_get_bpp;
s->get_offsets = vga_get_offsets;
s->get_resolution = vga_get_resolution;
s->update = vga_update_display;
s->invalidate = vga_invalidate_display;
s->screen_dump = vga_screen_dump;
s->text_update = vga_update_text;
switch (vga_retrace_method) {
case VGA_RETRACE_DUMB:
s->retrace = vga_dumb_retrace;
s->update_retrace_info = vga_dumb_update_retrace_info;
break;
case VGA_RETRACE_PRECISE:
s->retrace = vga_precise_retrace;
s->update_retrace_info = vga_precise_update_retrace_info;
break;
}
vga_dirty_log_start(s);
}
/* used by both ISA and PCI */
MemoryRegion *vga_init_io(VGACommonState *s)
{
MemoryRegion *vga_mem;
register_ioport_write(0x3c0, 16, 1, vga_ioport_write, s);
register_ioport_write(0x3b4, 2, 1, vga_ioport_write, s);
register_ioport_write(0x3d4, 2, 1, vga_ioport_write, s);
register_ioport_write(0x3ba, 1, 1, vga_ioport_write, s);
register_ioport_write(0x3da, 1, 1, vga_ioport_write, s);
register_ioport_read(0x3c0, 16, 1, vga_ioport_read, s);
register_ioport_read(0x3b4, 2, 1, vga_ioport_read, s);
register_ioport_read(0x3d4, 2, 1, vga_ioport_read, s);
register_ioport_read(0x3ba, 1, 1, vga_ioport_read, s);
register_ioport_read(0x3da, 1, 1, vga_ioport_read, s);
#ifdef CONFIG_BOCHS_VBE
#if defined (TARGET_I386)
register_ioport_read(0x1ce, 1, 2, vbe_ioport_read_index, s);
register_ioport_read(0x1cf, 1, 2, vbe_ioport_read_data, s);
register_ioport_write(0x1ce, 1, 2, vbe_ioport_write_index, s);
register_ioport_write(0x1cf, 1, 2, vbe_ioport_write_data, s);
#else
register_ioport_read(0x1ce, 1, 2, vbe_ioport_read_index, s);
register_ioport_read(0x1d0, 1, 2, vbe_ioport_read_data, s);
register_ioport_write(0x1ce, 1, 2, vbe_ioport_write_index, s);
register_ioport_write(0x1d0, 1, 2, vbe_ioport_write_data, s);
#endif
#endif /* CONFIG_BOCHS_VBE */
vga_mem = g_malloc(sizeof(*vga_mem));
memory_region_init_io(vga_mem, &vga_mem_ops, s,
"vga-lowmem", 0x20000);
return vga_mem;
}
void vga_init(VGACommonState *s, MemoryRegion *address_space)
{
MemoryRegion *vga_io_memory;
qemu_register_reset(vga_reset, s);
s->bank_offset = 0;
s->legacy_address_space = address_space;
vga_io_memory = vga_init_io(s);
memory_region_add_subregion_overlap(address_space,
isa_mem_base + 0x000a0000,
vga_io_memory,
1);
memory_region_set_coalescing(vga_io_memory);
}
void vga_init_vbe(VGACommonState *s, MemoryRegion *system_memory)
{
#ifdef CONFIG_BOCHS_VBE
/* XXX: use optimized standard vga accesses */
memory_region_add_subregion(system_memory,
VBE_DISPI_LFB_PHYSICAL_ADDRESS,
&s->vram);
s->vbe_mapped = 1;
#endif
}
/********************************************************/
/* vga screen dump */
static void vga_save_dpy_update(DisplayState *ds,
int x, int y, int w, int h)
{
if (screen_dump_filename) {
ppm_save(screen_dump_filename, ds->surface);
screen_dump_filename = NULL;
}
}
static void vga_save_dpy_resize(DisplayState *s)
{
}
static void vga_save_dpy_refresh(DisplayState *s)
{
}
int ppm_save(const char *filename, struct DisplaySurface *ds)
{
FILE *f;
uint8_t *d, *d1;
uint32_t v;
int y, x;
uint8_t r, g, b;
int ret;
char *linebuf, *pbuf;
f = fopen(filename, "wb");
if (!f)
return -1;
fprintf(f, "P6\n%d %d\n%d\n",
ds->width, ds->height, 255);
linebuf = g_malloc(ds->width * 3);
d1 = ds->data;
for(y = 0; y < ds->height; y++) {
d = d1;
pbuf = linebuf;
for(x = 0; x < ds->width; x++) {
if (ds->pf.bits_per_pixel == 32)
v = *(uint32_t *)d;
else
v = (uint32_t) (*(uint16_t *)d);
r = ((v >> ds->pf.rshift) & ds->pf.rmax) * 256 /
(ds->pf.rmax + 1);
g = ((v >> ds->pf.gshift) & ds->pf.gmax) * 256 /
(ds->pf.gmax + 1);
b = ((v >> ds->pf.bshift) & ds->pf.bmax) * 256 /
(ds->pf.bmax + 1);
*pbuf++ = r;
*pbuf++ = g;
*pbuf++ = b;
d += ds->pf.bytes_per_pixel;
}
d1 += ds->linesize;
ret = fwrite(linebuf, 1, pbuf - linebuf, f);
(void)ret;
}
g_free(linebuf);
fclose(f);
return 0;
}
static DisplayChangeListener* vga_screen_dump_init(DisplayState *ds)
{
DisplayChangeListener *dcl;
dcl = g_malloc0(sizeof(DisplayChangeListener));
dcl->dpy_update = vga_save_dpy_update;
dcl->dpy_resize = vga_save_dpy_resize;
dcl->dpy_refresh = vga_save_dpy_refresh;
register_displaychangelistener(ds, dcl);
return dcl;
}
/* save the vga display in a PPM image even if no display is
available */
static void vga_screen_dump(void *opaque, const char *filename)
{
VGACommonState *s = opaque;
if (!screen_dump_dcl)
screen_dump_dcl = vga_screen_dump_init(s->ds);
screen_dump_filename = (char *)filename;
vga_invalidate_display(s);
vga_hw_update();
}
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