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corresponding gamma change for sdl1

This commit is contained in:
rakslice 2020-08-18 03:28:43 -07:00
parent 792ad5ccff
commit d1fcff0a08
1 changed files with 34 additions and 2 deletions
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36
BasiliskII/src/SDL/video_sdl.cpp
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@ -155,6 +155,11 @@ static SDL_mutex *frame_buffer_lock = NULL;
#define LOCK_FRAME_BUFFER SDL_LockMutex(frame_buffer_lock)
#define UNLOCK_FRAME_BUFFER SDL_UnlockMutex(frame_buffer_lock)
// Previously set gamma tables
static uint16 last_gamma_red[256];
static uint16 last_gamma_green[256];
static uint16 last_gamma_blue[256];
// Video refresh function
static void VideoRefreshInit(void);
static void (*video_refresh)(void);
@ -1363,9 +1368,36 @@ void SDL_monitor_desc::set_palette(uint8 *pal, int num_in)
{
const VIDEO_MODE &mode = get_current_mode();
// FIXME: how can we handle the gamma ramp?
if ((int)VIDEO_MODE_DEPTH > VIDEO_DEPTH_8BIT)
if ((int)VIDEO_MODE_DEPTH > VIDEO_DEPTH_8BIT) {
// handle the gamma ramp
uint16 red[256];
uint16 green[256];
uint16 blue[256];
for (int i = 0; i < 256; i++) {
red[i] = pal[i*3 + 0] << 8;
green[i] = pal[i*3 + 1] << 8;
blue[i] = pal[i*3 + 2] << 8;
}
bool changed = (memcmp(red, last_gamma_red, 512) != 0 ||
memcmp(green, last_gamma_green, 512) != 0 ||
memcmp(blue, last_gamma_blue, 512) != 0);
if (changed) {
int result = SDL_SetGammaRamp(red, green, blue);
if (result < 0) {
printf("SDL_SetGammaRamp returned %d, SDL error:", result, SDL_GetError());
}
memcpy(last_gamma_red, red, 512);
memcpy(last_gamma_green, green, 512);
memcpy(last_gamma_blue, blue, 512);
}
return;
}
LOCK_PALETTE;