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Fix VGA screen dump 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6159 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2009-01-04 10:56:46 +00:00
parent 6fa724a34a
commit 4c5e8c5ce8
1 changed files with 86 additions and 27 deletions
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113
hw/vga.c
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@ -1223,6 +1223,35 @@ static const uint8_t cursor_glyph[32 * 4] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
static void vga_get_text_resolution(VGAState *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;
}
/*
* Text mode update
* Missing:
@ -1275,24 +1304,8 @@ static void vga_draw_text(VGAState *s, int full_update)
line_offset = s->line_offset;
s1 = s->vram_ptr + (s->start_addr * 4);
/* 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 */
vga_get_text_resolution(s, &width, &height, &cw, &cheight);
x_incr = cw * ((ds_get_bits_per_pixel(s->ds) + 7) >> 3);
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;
}
if ((height * width) > CH_ATTR_SIZE) {
/* better than nothing: exit if transient size is too big */
return;
@ -2542,11 +2555,29 @@ int ppm_save(const char *filename, uint8_t *data,
return 0;
}
/* save the vga display in a PPM image even if no display is
available */
static void vga_screen_dump(void *opaque, const char *filename)
static void vga_screen_dump_blank(VGAState *s, const char *filename)
{
FILE *f;
unsigned int y, x, w, h;
w = s->last_scr_width * sizeof(uint32_t);
h = s->last_scr_height;
f = fopen(filename, "wb");
if (!f)
return;
fprintf(f, "P6\n%d %d\n%d\n", w, h, 255);
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
fputc(0, f);
}
}
fclose(f);
}
static void vga_screen_dump_common(VGAState *s, const char *filename,
int w, int h)
{
VGAState *s = (VGAState *)opaque;
DisplayState *saved_ds, ds1, *ds = &ds1;
/* XXX: this is a little hackish */
@ -2559,14 +2590,42 @@ static void vga_screen_dump(void *opaque, const char *filename)
ds->dpy_refresh = vga_save_dpy_refresh;
ds->depth = 32;
ds->linesize = w * sizeof(uint32_t);
ds->data = qemu_mallocz(h * ds->linesize);
s->ds = ds;
s->graphic_mode = -1;
vga_update_display(s);
if (ds_get_data(ds)) {
ppm_save(filename, ds_get_data(ds), vga_save_w, vga_save_h,
ds_get_linesize(s->ds));
qemu_free(ds_get_data(ds));
}
ppm_save(filename, ds->data, w, h, ds->linesize);
qemu_free(ds->data);
s->ds = saved_ds;
}
static void vga_screen_dump_graphic(VGAState *s, const char *filename)
{
int w, h;
s->get_resolution(s, &w, &h);
vga_screen_dump_common(s, filename, w, h);
}
static void vga_screen_dump_text(VGAState *s, const char *filename)
{
int w, h, cwidth, cheight;
vga_get_text_resolution(s, &w, &h, &cwidth, &cheight);
vga_screen_dump_common(s, filename, w * cwidth, h * cheight);
}
/* save the vga display in a PPM image even if no display is
available */
static void vga_screen_dump(void *opaque, const char *filename)
{
VGAState *s = (VGAState *)opaque;
if (!(s->ar_index & 0x20))
vga_screen_dump_blank(s, filename);
else if (s->gr[6] & 1)
vga_screen_dump_graphic(s, filename);
else
vga_screen_dump_text(s, filename);
}