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/*
* Arm PrimeCell PL110 Color LCD Controller
*
* Copyright (c) 2005 CodeSourcery, LLC.
* Written by Paul Brook
*
* This code is licenced under the GNU LGPL
*
* Framebuffer format conversion routines.
*/
#ifndef ORDER
#if BITS == 8
#define COPY_PIXEL(to, from) *(to++) = from
#elif BITS == 15 || BITS == 16
#define COPY_PIXEL(to, from) *(uint16_t *)to = from; to += 2;
#elif BITS == 24
#define COPY_PIXEL(to, from) \
*(to++) = from; *(to++) = (from) >> 8; *(to++) = (from) >> 16
#elif BITS == 32
#define COPY_PIXEL(to, from) *(uint32_t *)to = from; to += 4;
#else
#error unknown bit depth
#endif
#define ORDER 0
#include "pl110_template.h"
#define ORDER 1
#include "pl110_template.h"
#define ORDER 2
#include "pl110_template.h"
static drawfn glue(pl110_draw_fn_,BITS)[18] =
{
glue(pl110_draw_line1_lblp,BITS),
glue(pl110_draw_line2_lblp,BITS),
glue(pl110_draw_line4_lblp,BITS),
glue(pl110_draw_line8_lblp,BITS),
glue(pl110_draw_line16_lblp,BITS),
glue(pl110_draw_line32_lblp,BITS),
glue(pl110_draw_line1_bbbp,BITS),
glue(pl110_draw_line2_bbbp,BITS),
glue(pl110_draw_line4_bbbp,BITS),
glue(pl110_draw_line8_bbbp,BITS),
glue(pl110_draw_line16_bbbp,BITS),
glue(pl110_draw_line32_bbbp,BITS),
glue(pl110_draw_line1_lbbp,BITS),
glue(pl110_draw_line2_lbbp,BITS),
glue(pl110_draw_line4_lbbp,BITS),
glue(pl110_draw_line8_lbbp,BITS),
glue(pl110_draw_line16_lbbp,BITS),
glue(pl110_draw_line32_lbbp,BITS)
};
#undef BITS
#undef COPY_PIXEL
#else
#if ORDER == 0
#define NAME glue(lblp, BITS)
#ifdef WORDS_BIGENDIAN
#define SWAP_WORDS 1
#endif
#elif ORDER == 1
#define NAME glue(bbbp, BITS)
#ifndef WORDS_BIGENDIAN
#define SWAP_WORDS 1
#endif
#else
#define SWAP_PIXELS 1
#define NAME glue(lbbp, BITS)
#ifdef WORDS_BIGENDIAN
#define SWAP_WORDS 1
#endif
#endif
#define FN_2(x, y) FN(x, y) FN(x+1, y)
#define FN_4(x, y) FN_2(x, y) FN_2(x+2, y)
#define FN_8(y) FN_4(0, y) FN_4(4, y)
static void glue(pl110_draw_line1_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
{
uint32_t data;
while (width > 0) {
data = *(uint32_t *)src;
#ifdef SWAP_PIXELS
#define FN(x, y) COPY_PIXEL(d, pallette[(data >> (y + 7 - (x))) & 1]);
#else
#define FN(x, y) COPY_PIXEL(d, pallette[(data >> ((x) + y)) & 1]);
#endif
#ifdef SWAP_WORDS
FN_8(24)
FN_8(16)
FN_8(8)
FN_8(0)
#else
FN_8(0)
FN_8(8)
FN_8(16)
FN_8(24)
#endif
#undef FN
width -= 32;
src += 4;
}
}
static void glue(pl110_draw_line2_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
{
uint32_t data;
while (width > 0) {
data = *(uint32_t *)src;
#ifdef SWAP_PIXELS
#define FN(x, y) COPY_PIXEL(d, pallette[(data >> (y + 6 - (x)*2)) & 3]);
#else
#define FN(x, y) COPY_PIXEL(d, pallette[(data >> ((x)*2 + y)) & 3]);
#endif
#ifdef SWAP_WORDS
FN_4(0, 24)
FN_4(0, 16)
FN_4(0, 8)
FN_4(0, 0)
#else
FN_4(0, 0)
FN_4(0, 8)
FN_4(0, 16)
FN_4(0, 24)
#endif
#undef FN
width -= 16;
src += 4;
}
}
static void glue(pl110_draw_line4_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
{
uint32_t data;
while (width > 0) {
data = *(uint32_t *)src;
#ifdef SWAP_PIXELS
#define FN(x, y) COPY_PIXEL(d, pallette[(data >> (y + 4 - (x)*4)) & 0xf]);
#else
#define FN(x, y) COPY_PIXEL(d, pallette[(data >> ((x)*4 + y)) & 0xf]);
#endif
#ifdef SWAP_WORDS
FN_2(0, 24)
FN_2(0, 16)
FN_2(0, 8)
FN_2(0, 0)
#else
FN_2(0, 0)
FN_2(0, 8)
FN_2(0, 16)
FN_2(0, 24)
#endif
#undef FN
width -= 8;
src += 4;
}
}
static void glue(pl110_draw_line8_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
{
uint32_t data;
while (width > 0) {
data = *(uint32_t *)src;
#define FN(x) COPY_PIXEL(d, pallette[(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(pl110_draw_line16_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *)src;
#ifdef SWAP_WORDS
data = bswap32(data);
#endif
#if 0
r = data & 0x1f;
data >>= 5;
g = data & 0x3f;
data >>= 6;
b = data & 0x1f;
data >>= 5;
#else
r = (data & 0x1f) << 3;
data >>= 5;
g = (data & 0x3f) << 2;
data >>= 6;
b = (data & 0x1f) << 3;
data >>= 5;
#endif
COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
r = (data & 0x1f) << 3;
data >>= 5;
g = (data & 0x3f) << 2;
data >>= 6;
b = (data & 0x1f) << 3;
data >>= 5;
COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
width -= 2;
src += 4;
}
}
static void glue(pl110_draw_line32_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
{
uint32_t data;
unsigned int r, g, b;
while (width > 0) {
data = *(uint32_t *)src;
#ifdef SWAP_WORDS
r = data & 0xff;
g = (data >> 8) & 0xff;
b = (data >> 16) & 0xff;
#else
r = (data >> 24) & 0xff;
g = (data >> 16) & 0xff;
b = (data >> 8) & 0xff;
#endif
COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
width--;
src += 4;
}
}
#undef SWAP_PIXELS
#undef NAME
#undef SWAP_WORDS
#undef ORDER
#endif
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