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authorSebastian Bauer <mail@sebastianbauer.info>2018-07-04 11:40:58 +0200
committerDavid Gibson <david@gibson.dropbear.id.au>2018-07-07 12:12:27 +1000
commitdebc7e7dad1e70c03d585d96625da0038eba375c (patch)
treef473397743f0f931e7fdf198949c41ddf4df7492
parent54b2a4339ccae45d4264c2437978abd04ff82bca (diff)
downloadqemu-arm-debc7e7dad1e70c03d585d96625da0038eba375c.tar.gz
sm501: Implement negated destination raster operation mode
Add support for the negated destination operation mode. This is used e.g. by AmigaOS for the INVERSEVID drawing mode. With this change, the cursor in the shell and non-immediate window adjustment are working now. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
-rw-r--r--hw/display/sm501.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/hw/display/sm501.c b/hw/display/sm501.c
index d4878f01c0..0b44d95169 100644
--- a/hw/display/sm501.c
+++ b/hw/display/sm501.c
@@ -705,6 +705,8 @@ static void sm501_2d_operation(SM501State *s)
uint32_t color = s->twoD_foreground;
int format_flags = (s->twoD_stretch >> 20) & 0x3;
int addressing = (s->twoD_stretch >> 16) & 0xF;
+ int rop_mode = (s->twoD_control >> 15) & 0x1; /* 1 for rop2, else rop3 */
+ int rop = s->twoD_control & 0xFF;
/* get frame buffer info */
uint8_t *src = s->local_mem + (s->twoD_source_base & 0x03FFFFFF);
@@ -729,6 +731,8 @@ static void sm501_2d_operation(SM501State *s)
int y, x, index_d, index_s; \
for (y = 0; y < operation_height; y++) { \
for (x = 0; x < operation_width; x++) { \
+ _pixel_type val; \
+ \
if (rtl) { \
index_s = ((src_y - y) * src_width + src_x - x) * _bpp; \
index_d = ((dst_y - y) * dst_width + dst_x - x) * _bpp; \
@@ -736,7 +740,13 @@ static void sm501_2d_operation(SM501State *s)
index_s = ((src_y + y) * src_width + src_x + x) * _bpp; \
index_d = ((dst_y + y) * dst_width + dst_x + x) * _bpp; \
} \
- *(_pixel_type *)&dst[index_d] = *(_pixel_type *)&src[index_s];\
+ if (rop_mode == 1 && rop == 5) { \
+ /* Invert dest */ \
+ val = ~*(_pixel_type *)&dst[index_d]; \
+ } else { \
+ val = *(_pixel_type *)&src[index_s]; \
+ } \
+ *(_pixel_type *)&dst[index_d] = val; \
} \
} \
}