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macfb: fix up 1-bit pixel encoding

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The MacOS driver expects the RGB values for the pixel to be in entries 0 and 1
of the colour palette.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20211007221253.29024-11-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2021-10-07 23:12:50 +01:00 committed by Laurent Vivier
parent df8abbbadf
commit 57eeaf44ce
1 changed files with 3 additions and 1 deletions
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4
hw/display/macfb.c
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@ -128,7 +128,9 @@ static void macfb_draw_line1(MacfbState *s, uint8_t *d, uint32_t addr,
for (x = 0; x < width; x++) {
int bit = x & 7;
int idx = (macfb_read_byte(s, addr) >> (7 - bit)) & 1;
r = g = b = ((1 - idx) << 7);
r = s->color_palette[idx * 3];
g = s->color_palette[idx * 3 + 1];
b = s->color_palette[idx * 3 + 2];
addr += (bit == 7);
*(uint32_t *)d = rgb_to_pixel32(r, g, b);