44 lines
864 B
C
44 lines
864 B
C
/*
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* grabfb.c - Grab the Ben's main frame buffer
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*
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* Written 2011 by Werner Almesberger
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* Copyright 2011 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdint.h>
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#include <assert.h>
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#include "ubb-vga.h"
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void grabfb(void **f, int xres, int yres)
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{
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uint32_t *fb = map(0x01d00000, 4*320*240);
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uint8_t *p, *q;
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int x, y;
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uint32_t pix;
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uint8_t r, g, b;
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assert(xres == 640);
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assert(yres == 480);
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for (y = 0; y != 240; y++) {
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p = f[y*2];
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q = f[y*2+1];
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for (x = 0; x != 320; x++) {
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pix = *fb++;
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r = pix >> 16;
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g = pix >> 8;
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b = pix;
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*p = *q = ccube_map(r, g, b)*0x11;
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p++;
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q++;
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}
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}
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}
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