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gamma tables work with X11

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This commit is contained in:
cebix 2001-06-30 22:23:44 +00:00
parent a3ea4f3ead
commit 50520dcf2f
3 changed files with 50 additions and 15 deletions
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3
BasiliskII/ChangeLog
View File

@ -1,5 +1,6 @@
V1.0 (snapshot) - <date>
- added support for on-the-fly video resolution and depth switching
- added support for on-the-fly video resolution and depth switching,
and gamma tables
- fsave/frestore emulation under AmigaOS and NetBSD/m68k always behaves
like a 68882/68040 FPU, eliminating the need for 68060 FPU patches

58
BasiliskII/src/Unix/video_x.cpp
View File

@ -384,10 +384,8 @@ void driver_base::update_palette(void)
{
if (cmap[0] && cmap[1]) {
int num = 256;
if (xdepth == 15)
num = 32;
else if (xdepth == 16)
num = 64;
if (vis->c_class == DirectColor && VideoMonitor.mode.depth == VDEPTH_16BIT)
num = vis->map_entries;
XStoreColors(x_display, cmap[0], palette, num);
XStoreColors(x_display, cmap[1], palette, num);
}
@ -1164,7 +1162,8 @@ bool VideoInit(bool classic)
case 16:
case 24:
case 32: // Try DirectColor first, as this will allow gamma correction
if (!XMatchVisualInfo(x_display, screen, xdepth, DirectColor, &visualInfo))
color_class = DirectColor;
if (!XMatchVisualInfo(x_display, screen, xdepth, color_class, &visualInfo))
color_class = TrueColor;
break;
default:
@ -1185,6 +1184,32 @@ bool VideoInit(bool classic)
if (color_class == PseudoColor || color_class == DirectColor) {
cmap[0] = XCreateColormap(x_display, rootwin, vis, AllocAll);
cmap[1] = XCreateColormap(x_display, rootwin, vis, AllocAll);
// Preset pixel members for gamma table
if (color_class == DirectColor) {
int num = vis->map_entries;
uint32 rmask = vis->red_mask, gmask = vis->green_mask, bmask = vis->blue_mask;
uint32 mask;
int rloss = 8, rshift = 0;
for (mask=rmask; !(mask&1); mask>>=1)
++rshift;
for (; mask&1; mask>>=1)
--rloss;
int gloss = 8, gshift = 0;
for (mask=gmask; !(mask&1); mask>>=1)
++gshift;
for (; mask&1; mask>>=1)
--gloss;
int bloss = 8, bshift = 0;
for (mask=bmask; !(mask&1); mask>>=1)
++bshift;
for (; mask&1; mask>>=1)
--bloss;
for (int i=0; i<num; i++) {
int c = (i * 256) / num;
palette[i].pixel = ((c >> rloss) << rshift) | ((c >> gloss) << gshift) | ((c >> bloss) << bshift);
}
}
}
// Get screen mode from preferences
@ -1366,12 +1391,23 @@ void video_set_palette(uint8 *pal)
LOCK_PALETTE;
// Convert colors to XColor array
for (int i=0; i<256; i++) {
palette[i].red = pal[i*3] * 0x0101;
palette[i].green = pal[i*3+1] * 0x0101;
palette[i].blue = pal[i*3+2] * 0x0101;
palette[i].pixel = i;
palette[i].flags = DoRed | DoGreen | DoBlue;
int num_in = 256, num_out = 256;
if (VideoMonitor.mode.depth == VDEPTH_16BIT) {
num_in = 32;
// If X is in 565 mode we have to stretch the palette from 32 to 64 entries
if (vis->c_class == DirectColor)
num_out = vis->map_entries;
}
XColor *p = palette;
for (int i=0; i<num_out; i++) {
int c = (i * num_in) / num_out;
p->red = pal[c*3 + 0] * 0x0101;
p->green = pal[c*3 + 1] * 0x0101;
p->blue = pal[c*3 + 2] * 0x0101;
if (!IsDirectMode(VideoMonitor.mode))
p->pixel = i;
p->flags = DoRed | DoGreen | DoBlue;
p++;
}
// Tell redraw thread to change palette

4
BasiliskII/src/video.cpp
View File

@ -169,10 +169,9 @@ static void load_ramp_palette(void)
}
int num = (VidLocal.desc->mode.depth == VDEPTH_16BIT ? 32 : 256);
int inc = 256 / num, value = 0;
uint8 *p = VidLocal.palette;
for (int i=0; i<num; i++) {
uint8 red = value, green = value, blue = value;
uint8 red = (i * 256 / num), green = red, blue = red;
if (have_gamma) {
red = red_gamma[red >> (8 - data_width)];
green = green_gamma[green >> (8 - data_width)];
@ -181,7 +180,6 @@ static void load_ramp_palette(void)
*p++ = red;
*p++ = green;
*p++ = blue;
value += inc;
}
video_set_palette(VidLocal.palette);