Commit d2733559 authored by Sebastian Bauer's avatar Sebastian Bauer Committed by David Gibson
Browse files

sm501: Perform a full update after palette change 



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: default avatarSebastian Bauer <mail@sebastianbauer.info>
Signed-off-by: default avatarBALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent 4a1f253a

hw/display/sm501.c

+8 −0
Original line number Diff line number Diff line
@@ -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);