/*
* Pixel drawing function templates for QEMU SM501 Device
*
* Copyright (c) 2008 Shin-ichiro KAWASAKI
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#if DEPTH == 8
#define BPP 1
#define PIXEL_TYPE uint8_t
#elif DEPTH == 15 || DEPTH == 16
#define BPP 2
#define PIXEL_TYPE uint16_t
#elif DEPTH == 32
#define BPP 4
#define PIXEL_TYPE uint32_t
#else
#error unsupport depth
#endif
#ifdef BGR_FORMAT
#define PIXEL_NAME glue(DEPTH, bgr)
#else
#define PIXEL_NAME DEPTH
#endif /* BGR_FORMAT */
static void glue(draw_line8_, PIXEL_NAME)(
uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
{
uint8_t v, r, g, b;
do {
v = ldub_raw(s);
r = (pal[v] >> 16) & 0xff;
g = (pal[v] >> 8) & 0xff;
b = (pal[v] >> 0) & 0xff;
((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
s ++;
d += BPP;
} while (-- width != 0);
}
static void glue(draw_line16_, PIXEL_NAME)(
uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
{
uint16_t rgb565;
uint8_t r, g, b;
do {
rgb565 = lduw_raw(s);
r = ((rgb565 >> 11) & 0x1f) << 3;
g = ((rgb565 >> 5) & 0x3f) << 2;
b = ((rgb565 >> 0) & 0x1f) << 3;
((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
s += 2;
d += BPP;
} while (-- width != 0);
}
static void glue(draw_line32_, PIXEL_NAME)(
uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
{
uint8_t r, g, b;
do {
ldub_raw(s);
#if defined(TARGET_WORDS_BIGENDIAN)
r = s[1];
g = s[2];
b = s[3];
#else
b = s[0];
g = s[1];
r = s[2];
#endif
((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
s += 4;
d += BPP;
} while (-- width != 0);
}
/**
* Draw hardware cursor image on the given line.
*/
static void glue(draw_hwc_line_, PIXEL_NAME)(SM501State * s, int crt,
uint8_t * palette, int c_y, uint8_t *d, int width)
{
int x, i;
uint8_t bitset = 0;
/* get hardware cursor pattern */
uint32_t cursor_addr = get_hwc_address(s, crt);
assert(0 <= c_y && c_y < SM501_HWC_HEIGHT);
cursor_addr += 64 * c_y / 4; /* 4 pixels per byte */
cursor_addr += s->base;
/* get cursor position */
x = get_hwc_x(s, crt);
d += x * BPP;
for (i = 0; i < SM501_HWC_WIDTH && x + i < width; i++) {
uint8_t v;
/* get pixel value */
if (i % 4 == 0) {
bitset = ldub_phys(cursor_addr);
cursor_addr++;
}
v = bitset & 3;
bitset >>= 2;
/* write pixel */
if (v) {
v--;
uint8_t r = palette[v * 3 + 0];
uint8_t g = palette[v * 3 + 1];
uint8_t b = palette[v * 3 + 2];
((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
}
d += BPP;
}
}
#undef DEPTH
#undef BPP
#undef PIXEL_TYPE
#undef PIXEL_NAME
#undef BGR_FORMAT
