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hw/display/sm501: Implement more 2D raster operations 

Add simple implementation for two raster operations that are used by
AmigaOS which fixes graphics problems in some programs using these.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reported-by: Rene Engel <ReneEngel80@emailn.de>
Tested-by: Rene Engel <ReneEngel80@emailn.de>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <17ef3c59dc7868f75034e9ebe21e2999c8f718d4.1677445307.git.balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
BALATON Zoltan 2023-02-15 16:35:42 +01:00 committed by Philippe Mathieu-Daudé
parent 6a01504660
commit 8b0ce7f7c8
1 changed files with 29 additions and 1 deletions
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30
hw/display/sm501.c
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@ -754,7 +754,7 @@ static void sm501_2d_operation(SM501State *s)
}
if ((rop_mode && rop == 0x5) || (!rop_mode && rop == 0x55)) {
/* Invert dest, is there a way to do this with pixman? */
/* DSTINVERT, is there a way to do this with pixman? */
unsigned int x, y, i;
uint8_t *d = s->local_mem + dst_base;
@ -764,6 +764,34 @@ static void sm501_2d_operation(SM501State *s)
stn_he_p(&d[i], bypp, ~ldn_he_p(&d[i], bypp));
}
}
} else if (!rop_mode && rop == 0x99) {
/* DSxn, is there a way to do this with pixman? */
unsigned int x, y, i, j;
uint8_t *sp = s->local_mem + src_base;
uint8_t *d = s->local_mem + dst_base;
for (y = 0; y < height; y++) {
i = (dst_x + (dst_y + y) * dst_pitch) * bypp;
j = (src_x + (src_y + y) * src_pitch) * bypp;
for (x = 0; x < width; x++, i += bypp, j += bypp) {
stn_he_p(&d[i], bypp,
~(ldn_he_p(&sp[j], bypp) ^ ldn_he_p(&d[i], bypp)));
}
}
} else if (!rop_mode && rop == 0xee) {
/* SRCPAINT, is there a way to do this with pixman? */
unsigned int x, y, i, j;
uint8_t *sp = s->local_mem + src_base;
uint8_t *d = s->local_mem + dst_base;
for (y = 0; y < height; y++) {
i = (dst_x + (dst_y + y) * dst_pitch) * bypp;
j = (src_x + (src_y + y) * src_pitch) * bypp;
for (x = 0; x < width; x++, i += bypp, j += bypp) {
stn_he_p(&d[i], bypp,
ldn_he_p(&sp[j], bypp) | ldn_he_p(&d[i], bypp));
}
}
} else {
/* Do copy src for unimplemented ops, better than unpainted area */
if ((rop_mode && (rop != 0xc || rop2_source_is_pattern)) ||