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/*
* Intel XScale PXA255/270 LCDC emulation.
*
* Copyright (c) 2006 Openedhand Ltd.
* Written by Andrzej Zaborowski <balrog@zabor.org>
*
* This code is licensed under the GPLv2.
*
* Framebuffer format conversion routines.
*/
# define SKIP_PIXEL(to) to += deststep
#if BITS == 8
# define COPY_PIXEL(to, from) *to = from; SKIP_PIXEL(to)
#elif BITS == 15 || BITS == 16
# define COPY_PIXEL(to, from) *(uint16_t *) to = from; SKIP_PIXEL(to)
#elif BITS == 24
# define COPY_PIXEL(to, from) \
*(uint16_t *) to = from; *(to + 2) = (from) >> 16; SKIP_PIXEL(to)
#elif BITS == 32
# define COPY_PIXEL(to, from) *(uint32_t *) to = from; SKIP_PIXEL(to)
#else
# error unknown bit depth
#endif
#ifdef HOST_WORDS_BIGENDIAN
# define SWAP_WORDS 1
#endif
#define FN_2(x) FN(x + 1) FN(x)
#define FN_4(x) FN_2(x + 2) FN_2(x)
static void glue(pxa2xx_draw_line2_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t *palette = opaque;
uint32_t data;
while (width > 0) {
data = *(uint32_t *) src;
#define FN(x) COPY_PIXEL(dest, palette[(data >> ((x) * 2)) & 3]);
#ifdef SWAP_WORDS
FN_4(12)
FN_4(8)
FN_4(4)
FN_4(0)
#else
FN_4(0)
FN_4(4)
FN_4(8)
FN_4(12)
#endif
#undef FN
width -= 16;
src += 4;
}
}
static void glue(pxa2xx_draw_line4_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t *palette = opaque;
uint32_t data;
while (width > 0) {
data = *(uint32_t *) src;
#define FN(x) COPY_PIXEL(dest, palette[(data >> ((x) * 4)) & 0xf]);
#ifdef SWAP_WORDS
FN_2(6)
FN_2(4)
FN_2(2)
FN_2(0)
#else
FN_2(0)
FN_2(2)
FN_2(4)
FN_2(6)
#endif
#undef FN
width -= 8;
src += 4;
}
}
static void glue(pxa2xx_draw_line8_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t *palette = opaque;
uint32_t data;
while (width > 0) {
data = *(uint32_t *) src;
#define FN(x) COPY_PIXEL(dest, palette[(data >> (x)) & 0xff]);
#ifdef SWAP_WORDS
FN(24)
FN(16)
FN(8)
FN(0)
#else
FN(0)
FN(8)
FN(16)
FN(24)
#endif
#undef FN
width -= 4;
src += 4;
}
}
static void glue(pxa2xx_draw_line16_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = (data & 0x1f) << 3;
data >>= 5;
g = (data & 0x3f) << 2;
data >>= 6;
r = (data & 0x1f) << 3;
data >>= 5;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
b = (data & 0x1f) << 3;
data >>= 5;
g = (data & 0x3f) << 2;
data >>= 6;
r = (data & 0x1f) << 3;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 2;
src += 4;
}
}
static void glue(pxa2xx_draw_line16t_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = (data & 0x1f) << 3;
data >>= 5;
g = (data & 0x1f) << 3;
data >>= 5;
r = (data & 0x1f) << 3;
data >>= 5;
if (data & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
data >>= 1;
b = (data & 0x1f) << 3;
data >>= 5;
g = (data & 0x1f) << 3;
data >>= 5;
r = (data & 0x1f) << 3;
data >>= 5;
if (data & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 2;
src += 4;
}
}
static void glue(pxa2xx_draw_line18_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = (data & 0x3f) << 2;
data >>= 6;
g = (data & 0x3f) << 2;
data >>= 6;
r = (data & 0x3f) << 2;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 1;
src += 4;
}
}
/* The wicked packed format */
static void glue(pxa2xx_draw_line18p_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data[3];
unsigned int r, g, b;
while (width > 0) {
data[0] = *(uint32_t *) src;
src += 4;
data[1] = *(uint32_t *) src;
src += 4;
data[2] = *(uint32_t *) src;
src += 4;
#ifdef SWAP_WORDS
data[0] = bswap32(data[0]);
data[1] = bswap32(data[1]);
data[2] = bswap32(data[2]);
#endif
b = (data[0] & 0x3f) << 2;
data[0] >>= 6;
g = (data[0] & 0x3f) << 2;
data[0] >>= 6;
r = (data[0] & 0x3f) << 2;
data[0] >>= 12;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
b = (data[0] & 0x3f) << 2;
data[0] >>= 6;
g = ((data[1] & 0xf) << 4) | (data[0] << 2);
data[1] >>= 4;
r = (data[1] & 0x3f) << 2;
data[1] >>= 12;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
b = (data[1] & 0x3f) << 2;
data[1] >>= 6;
g = (data[1] & 0x3f) << 2;
data[1] >>= 6;
r = ((data[2] & 0x3) << 6) | (data[1] << 2);
data[2] >>= 8;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
b = (data[2] & 0x3f) << 2;
data[2] >>= 6;
g = (data[2] & 0x3f) << 2;
data[2] >>= 6;
r = data[2] << 2;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 4;
}
}
static void glue(pxa2xx_draw_line19_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = (data & 0x3f) << 2;
data >>= 6;
g = (data & 0x3f) << 2;
data >>= 6;
r = (data & 0x3f) << 2;
data >>= 6;
if (data & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 1;
src += 4;
}
}
/* The wicked packed format */
static void glue(pxa2xx_draw_line19p_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data[3];
unsigned int r, g, b;
while (width > 0) {
data[0] = *(uint32_t *) src;
src += 4;
data[1] = *(uint32_t *) src;
src += 4;
data[2] = *(uint32_t *) src;
src += 4;
# ifdef SWAP_WORDS
data[0] = bswap32(data[0]);
data[1] = bswap32(data[1]);
data[2] = bswap32(data[2]);
# endif
b = (data[0] & 0x3f) << 2;
data[0] >>= 6;
g = (data[0] & 0x3f) << 2;
data[0] >>= 6;
r = (data[0] & 0x3f) << 2;
data[0] >>= 6;
if (data[0] & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
data[0] >>= 6;
b = (data[0] & 0x3f) << 2;
data[0] >>= 6;
g = ((data[1] & 0xf) << 4) | (data[0] << 2);
data[1] >>= 4;
r = (data[1] & 0x3f) << 2;
data[1] >>= 6;
if (data[1] & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
data[1] >>= 6;
b = (data[1] & 0x3f) << 2;
data[1] >>= 6;
g = (data[1] & 0x3f) << 2;
data[1] >>= 6;
r = ((data[2] & 0x3) << 6) | (data[1] << 2);
data[2] >>= 2;
if (data[2] & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
data[2] >>= 6;
b = (data[2] & 0x3f) << 2;
data[2] >>= 6;
g = (data[2] & 0x3f) << 2;
data[2] >>= 6;
r = data[2] << 2;
data[2] >>= 6;
if (data[2] & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 4;
}
}
static void glue(pxa2xx_draw_line24_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = data & 0xff;
data >>= 8;
g = data & 0xff;
data >>= 8;
r = data & 0xff;
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 1;
src += 4;
}
}
static void glue(pxa2xx_draw_line24t_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = (data & 0x7f) << 1;
data >>= 7;
g = data & 0xff;
data >>= 8;
r = data & 0xff;
data >>= 8;
if (data & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 1;
src += 4;
}
}
static void glue(pxa2xx_draw_line25_, BITS)(void *opaque,
uint8_t *dest, const uint8_t *src, int width, int deststep)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *) src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
b = data & 0xff;
data >>= 8;
g = data & 0xff;
data >>= 8;
r = data & 0xff;
data >>= 8;
if (data & 1)
SKIP_PIXEL(dest);
else
COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
width -= 1;
src += 4;
}
}
/* Overlay planes disabled, no transparency */
static drawfn glue(pxa2xx_draw_fn_, BITS)[16] =
{
[0 ... 0xf] = NULL,
[pxa_lcdc_2bpp] = glue(pxa2xx_draw_line2_, BITS),
[pxa_lcdc_4bpp] = glue(pxa2xx_draw_line4_, BITS),
[pxa_lcdc_8bpp] = glue(pxa2xx_draw_line8_, BITS),
[pxa_lcdc_16bpp] = glue(pxa2xx_draw_line16_, BITS),
[pxa_lcdc_18bpp] = glue(pxa2xx_draw_line18_, BITS),
[pxa_lcdc_18pbpp] = glue(pxa2xx_draw_line18p_, BITS),
[pxa_lcdc_24bpp] = glue(pxa2xx_draw_line24_, BITS),
};
/* Overlay planes enabled, transparency used */
static drawfn glue(glue(pxa2xx_draw_fn_, BITS), t)[16] =
{
[0 ... 0xf] = NULL,
[pxa_lcdc_4bpp] = glue(pxa2xx_draw_line4_, BITS),
[pxa_lcdc_8bpp] = glue(pxa2xx_draw_line8_, BITS),
[pxa_lcdc_16bpp] = glue(pxa2xx_draw_line16t_, BITS),
[pxa_lcdc_19bpp] = glue(pxa2xx_draw_line19_, BITS),
[pxa_lcdc_19pbpp] = glue(pxa2xx_draw_line19p_, BITS),
[pxa_lcdc_24bpp] = glue(pxa2xx_draw_line24t_, BITS),
[pxa_lcdc_25bpp] = glue(pxa2xx_draw_line25_, BITS),
};
#undef BITS
#undef COPY_PIXEL
#undef SKIP_PIXEL
#ifdef SWAP_WORDS
# undef SWAP_WORDS
#endif
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