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sm501: Perform a full update after palette change

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Changing the palette of a color index has as an immediate effect on
all pixels with the corresponding index on real hardware. Performing a
full update after a palette change is a simple way to emulate this
effect.

Signed-off-by: Sebastian Bauer <mail@sebastianbauer.info>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Sebastian Bauer 2018-07-04 11:40:58 +02:00 committed by David Gibson
parent 4a1f253adb
commit d27335592a
1 changed files with 8 additions and 0 deletions
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8
hw/display/sm501.c
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@ -487,6 +487,7 @@ typedef struct SM501State {
MemoryRegion twoD_engine_region;
uint32_t last_width;
uint32_t last_height;
bool do_full_update; /* perform a full update next time */
I2CBus *i2c_bus;
/* mmio registers */
@ -1042,6 +1043,7 @@ static void sm501_palette_write(void *opaque, hwaddr addr,
assert(range_covers_byte(0, 0x400 * 3, addr));
*(uint32_t *)&s->dc_palette[addr] = value;
s->do_full_update = true;
}
static uint64_t sm501_disp_ctrl_read(void *opaque, hwaddr addr,
@ -1630,6 +1632,12 @@ static void sm501_update_display(void *opaque)
full_update = 1;
}
/* someone else requested a full update */
if (s->do_full_update) {
s->do_full_update = false;
full_update = 1;
}
/* draw each line according to conditions */
snap = memory_region_snapshot_and_clear_dirty(&s->local_mem_region,
offset, width * height * src_bpp, DIRTY_MEMORY_VGA);