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sm501: Fix hardware cursor color conversion

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According to the sm501 specs the hardware cursor colors are to be given in
the rgb565 format, but the code currently interprets them as bgr565.

Therefore, the colors of the hardware cursors are wrong in the QEMU
display, e.g., the standard mouse pointer of AmigaOS appears blue instead
of red. This change fixes this issue by replacing the existing naive
bgr565 => rgb888 conversion with a standard rgb565 => rgb888 one that also
scales the color component values properly.

Signed-off-by: Sebastian Bauer <mail@sebastianbauer.info>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Sebastian Bauer 2018-06-18 23:38:16 +02:00 committed by David Gibson
parent 88d8d5555d
commit a69232e2a3
1 changed files with 3 additions and 3 deletions
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6
hw/display/sm501.c
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@ -652,9 +652,9 @@ static inline void get_hwc_palette(SM501State *state, int crt, uint8_t *palette)
} else {
rgb565 = color_reg & 0xFFFF;
}
palette[i * 3 + 0] = (rgb565 << 3) & 0xf8; /* red */
palette[i * 3 + 1] = (rgb565 >> 3) & 0xfc; /* green */
palette[i * 3 + 2] = (rgb565 >> 8) & 0xf8; /* blue */
palette[i * 3 + 0] = ((rgb565 >> 11) * 527 + 23) >> 6; /* r */
palette[i * 3 + 1] = (((rgb565 >> 5) & 0x3f) * 259 + 33) >> 6; /* g */
palette[i * 3 + 2] = ((rgb565 & 0x1f) * 527 + 23) >> 6; /* b */
}
}