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/*
* QEMU model of the Milkymist VGA framebuffer.
*
* Copyright (c) 2010 Michael Walle <michael@walle.cc>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
*/
#if BITS == 8
#define COPY_PIXEL(to, r, g, b) \
do { \
*to = rgb_to_pixel8(r, g, b); \
to += 1; \
} while (0)
#elif BITS == 15
#define COPY_PIXEL(to, r, g, b) \
do { \
*(uint16_t *)to = rgb_to_pixel15(r, g, b); \
to += 2; \
} while (0)
#elif BITS == 16
#define COPY_PIXEL(to, r, g, b) \
do { \
*(uint16_t *)to = rgb_to_pixel16(r, g, b); \
to += 2; \
} while (0)
#elif BITS == 24
#define COPY_PIXEL(to, r, g, b) \
do { \
uint32_t tmp = rgb_to_pixel24(r, g, b); \
*(to++) = tmp & 0xff; \
*(to++) = (tmp >> 8) & 0xff; \
*(to++) = (tmp >> 16) & 0xff; \
} while (0)
#elif BITS == 32
#define COPY_PIXEL(to, r, g, b) \
do { \
*(uint32_t *)to = rgb_to_pixel32(r, g, b); \
to += 4; \
} while (0)
#else
#error unknown bit depth
#endif
static void glue(draw_line_, BITS)(void *opaque, uint8_t *d, const uint8_t *s,
int width, int deststep)
{
uint16_t rgb565;
uint8_t r, g, b;
while (width--) {
memcpy(&rgb565, s, sizeof(rgb565));
r = ((rgb565 >> 11) & 0x1f) << 3;
g = ((rgb565 >> 5) & 0x3f) << 2;
b = ((rgb565 >> 0) & 0x1f) << 3;
COPY_PIXEL(d, r, g, b);
s += 2;
}
}
#undef BITS
#undef COPY_PIXEL
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