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raster.c
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/* @(#)highwire/image.c
*/
#include <stddef.h>
#include <string.h>
#include <gemx.h>
#include "global.h"
#include "image_P.h"
static ULONG cube216[216];
static ULONG graymap[32];
/*******************************************************************************
*
* Line Raster Functions
*/
/*------------------------------------------------------------------------------
* monochrome format
*/
static void
raster_mono (IMGINFO info, void * _dst)
{
#if defined(__GNUC__) && !defined(__mcoldfire__)
__asm__ volatile (
"subq.w #1, %2 | width\n"
" move.l %3, d0 | scale -> index\n"
" addq.l #1, d0\n"
" lsr.l #1, d0\n"
"0:\n"
" clr.w d1 | chunk\n"
" move.w #0x8000, d2 | pixel\n"
"1:\n"
" swap d0\n"
" btst #0, (d0.w,%1) | (src[index>>16] & 1)\n"
" beq.b 2f\n"
" or.w d2, d1 | chunk |= pixel\n"
"2:\n"
" swap d0\n"
" add.l %3, d0 | index += info->IncXfx\n"
" lsr.w #1, d2\n"
" dbeq %2, 1b\n"
" move.w d1, (%0)+\n"
" subq.w #1, %2\n"
" bpl.b 0b"
: /* output */
: "a"(_dst), "a"(info->RowBuf),
/* %0 %1 */
"d"(info->DthWidth),"d"(info->IncXfx) /* input */
/* %2 %3 */
: "d0","d1","d2" /* clobbered */
);
#elif defined(__PUREC__)
extern void pc_raster_mono (void *, void *, short, size_t);
pc_raster_mono (_dst, info->RowBuf, info->DthWidth, info->IncXfx);
#else
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
if (info->RowBuf[x >>16] & 1) chunk |= pixel;
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
#endif
}
/*------------------------------------------------------------------------------
* device independend, for unrecognized screen format.
*/
static void
raster_stnd (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
UWORD pixel = 0x8000;
do {
short color = map[(UWORD)info->RowBuf[x >>16] & mask];
UWORD * chunk = dst;
short i = planes;
do {
if (color & 1) *chunk |= pixel;
else *chunk &= ~pixel;
chunk += info->PgSize;
color >>= 1;
} while (--i);
if (!(pixel >>= 1)) {
pixel = 0x8000;
dst++;
}
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------
* 1 plane, uses a simple intensity dither. the pixel index array must contain
* intensity values of [0..4080].
*/
static void
raster_D1 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
short * buf = info->DthBuf;
short ins = 0;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
ins += *buf + map[(short)info->RowBuf[x >>16] & mask];
if (ins < 2040) {
chunk |= pixel;
} else {
ins -= 4080;
}
*(buf++) = (ins >>= 2);
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_D1 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
short * buf = info->DthBuf;
short ins = 0;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
ins += *buf + (short)info->RowBuf[x >>16];
if (ins < 0x80) {
chunk |= pixel;
} else {
ins -= 0xFF;
}
*(buf++) = (ins >>= 2);
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
dither_D1 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
short * buf = info->DthBuf;
short ins = 0;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
char * rgb = (char*)&info->RowBuf[(x >>16) *3];
ins += *buf + (WORD)rgb[0] *5 + (WORD)rgb[1] *9 + (WORD)rgb[2] *2;
if (ins < 2040) {
chunk |= pixel;
} else {
ins -= 4080;
}
*(buf++) = (ins >>= 2);
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------
* 2 planes interleaved words format, uses a simple intensity dither. the pixel
* index array must contain intensity values of [0..4080].
*/
static void
raster_D2 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
short * buf = info->DthBuf;
short ins = 0;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
ins += *buf + map[(short)info->RowBuf[x >>16] & mask];
if (ins < 2040) {
chunk |= pixel;
} else {
ins -= 4080;
}
*(buf++) = (ins >>= 2);
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_D2 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
short * buf = info->DthBuf;
short ins = 0;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
ins += *buf + (short)info->RowBuf[x >>16];
if (ins < 0x80) {
chunk |= pixel;
} else {
ins -= 0xFF;
}
*(buf++) = (ins >>= 2);
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
dither_D2 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
short * buf = info->DthBuf;
short ins = 0;
UWORD pixel = 0x8000;
UWORD chunk = 0;
do {
CHAR * rgb = &info->RowBuf[(x >>16) *3];
ins += *buf + (WORD)rgb[0] *5 + (WORD)rgb[1] *9 + (WORD)rgb[2] *2;
if (ins < 2040) {
chunk |= pixel;
} else {
ins -= 4080;
}
*(buf++) = (ins >>= 2);
if (!--width || !(pixel >>= 1)) {
*(dst++) = chunk;
*(dst++) = chunk;
chunk = 0;
pixel = 0x8000;
}
x += info->IncXfx;
} while (width);
}
#if defined(__GNUC__) && !defined(__mcoldfire__)
/*------------------------------------------------------------------------------
* Converts 'num'=[1..16] pixel bytes into 4 word chunks of the the I4
* interleaved words formats.
*/
static void
raster_chunk4 (CHAR * src, UWORD * dst, size_t num)
{
__asm__ volatile (
" clr.l d4\n"
" move.b (%0)+, d4\n"
" move.l d4, d5\n"
" andi.b #0x03, d4 |chunks 0/1\n"
" ror.l #1, d4\n"
" ror.w #1, d4\n"
" andi.b #0x0C, d5 |chunks 2/3\n"
" ror.l #3, d5\n"
" ror.w #1, d5\n"
" subq.l #2, %2\n"
" bmi 9f\n"
" moveq.l #1, d1\n"
"1: | chunk loop\n"
" move.b (%0)+, d2\n"
" moveq.l #0x03, d3 |chunks 0/1\n"
" and.b d2, d3\n"
" ror.l #1, d3\n"
" ror.w #1, d3\n"
" lsr.l d1, d3\n"
" or.l d3, d4\n"
" moveq.l #0x0C, d3 |chunks 2/3\n"
" and.b d2, d3\n"
" ror.l #3, d3\n"
" ror.w #1, d3\n"
" lsr.l d1, d3\n"
" or.l d3, d5\n"
" addq.w #1, d1\n"
" dbra %2, 1b | chunk loop\n"
"9:\n"
" movem.l d4-d5, (%1)"
: /* no return value */
: "a"(src),"a"(dst), "d"(num)
/* %0 %1 %2 */
: "d1","d2","d3","d4","d5"
);
}
/*------------------------------------------------------------------------------
* Converts 'num'=[1..16] pixel bytes into 8 word chunks.
* Used for the I8 interleaved words formats.
*/
static void
raster_chunk8 (CHAR * src, UWORD * dst, size_t num)
{
__asm__ volatile (
" clr.l d4\n"
" move.b (%0)+, d4\n"
" move.l d4, d5\n"
" move.l d4, d6\n"
" move.l d4, d7\n"
" andi.b #0x03, d4 |chunks 0/1\n"
" ror.l #1, d4\n"
" ror.w #1, d4\n"
" andi.b #0x0C, d5 |chunks 2/3\n"
" ror.l #3, d5\n"
" ror.w #1, d5\n"
" andi.b #0x30, d6 |chunks 4/5\n"
" ror.l #5, d6\n"
" ror.w #1, d6\n"
" andi.b #0xC0, d7 |chunks 6/7\n"
" ror.l #7, d7\n"
" ror.w #1, d7\n"
" subq.l #2, %2\n"
" bmi 9f\n"
" moveq.l #1, d1\n"
"1: | chunk loop\n"
" move.b (%0)+, d2\n"
" moveq.l #0x03, d3 |chunks 0/1\n"
" and.b d2, d3\n"
" ror.l #1, d3\n"
" ror.w #1, d3\n"
" lsr.l d1, d3\n"
" or.l d3, d4\n"
" moveq.l #0x0C, d3 |chunks 2/3\n"
" and.b d2, d3\n"
" ror.l #3, d3\n"
" ror.w #1, d3\n"
" lsr.l d1, d3\n"
" or.l d3, d5\n"
" moveq.l #0x30, d3 |chunks 4/5\n"
" and.b d2, d3\n"
" ror.l #5, d3\n"
" ror.w #1, d3\n"
" lsr.l d1, d3\n"
" or.l d3, d6\n"
" move.l #0xC0, d3 |chunks 6/7\n"
" and.b d2, d3\n"
" ror.l #7, d3\n"
" ror.w #1, d3\n"
" lsr.l d1, d3\n"
" or.l d3, d7\n"
" addq.w #1, d1\n"
" dbra %2, 1b | chunk loop\n"
"9:\n"
" movem.l d4-d7, (%1)"
: /* no return value */
: "a"(src),"a"(dst), "d"(num)
/* %0 %1 %2 */
: "d1","d2","d3","d4","d5","d6","d7"
);
}
#elif defined(__PUREC__)
void raster_chunk4 (CHAR * src, UWORD * dst, size_t num);
void raster_chunk8 (CHAR * src, UWORD * dst, size_t num);
#else
/*------------------------------------------------------------------------------
* Converts 'num'=[1..16] pixel bytes into 'depth'=[1..8] word chunks.
* Used for the I4 and I8 interleaved words formats.
*/
static void
raster_chunks (CHAR * src, UWORD * dst, UWORD num, UWORD depth)
{
UWORD mask = 0x8000;
UWORD * chunk = dst;
CHAR pixel = *src;
short i = depth;
do {
*(chunk++) = (pixel & 1 ? mask : 0);
pixel >>= 1;
} while (--i);
while (--num) {
mask >>= 1;
chunk = dst;
pixel = *(++src);
i = depth;
do {
if (pixel & 1) *chunk |= mask;
else *chunk &= ~mask;
chunk++;
pixel >>= 1;
} while (--i);
}
}
#define raster_chunk4(s,d,n) raster_chunks (s, d, n, 4)
#define raster_chunk8(s,d,n) raster_chunks (s, d, n, 8)
#endif
/*----------------------------------------------------------------------------*/
#ifdef __GNUC__
static inline CHAR
#else
static CHAR
#endif
dither_gray (CHAR * gray, WORD * err, BYTE ** buf)
{
BYTE * dth = *buf;
UWORD idx = ((err[0] += (WORD)dth[0] + gray[0])
<= 0x07 ? 0 : err[0] >= 0xF8 ? 0x1F : err[0] >>3);
CHAR * irgb = (CHAR*)&graymap[idx];
err[0] -= irgb[1];
dth[0] = (err[0] <= -254 ? (err[0] = -127) :
err[0] >= +254 ? (err[0] = +127) : (err[0] /= 2));
(*buf) += 1;
return irgb[0];
}
/*----------------------------------------------------------------------------*/
#ifdef __GNUC__
static inline CHAR
#else
static CHAR
#endif
dither_true (CHAR * rgb, WORD * err, BYTE ** buf)
{
BYTE * dth = *buf;
UWORD r = ((err[0] += (WORD)dth[0] + rgb[0])
<= 42 ? 0 : err[0] >= 213 ? 5 : (err[0] *3) >>7);
UWORD g = ((err[1] += (WORD)dth[1] + rgb[1])
<= 42 ? 0 : err[1] >= 213 ? 5 : (err[1] *3) >>7);
UWORD b = ((err[2] += (WORD)dth[2] + rgb[2])
<= 42 ? 0 : err[2] >= 213 ? 5 : (err[2] *3) >>7);
CHAR * irgb;
if (r == g && g == b) {
WORD i = (err[0] + err[1] + err[2]) /24;
irgb = (CHAR*)&graymap[i <= 0 ? 0 : i >= 31 ? 31 : i];
} else {
irgb = (CHAR*)&cube216[(r *6 + g) *6 + b];
}
err[0] -= irgb[1];
dth[0] = (err[0] <= -254 ? (err[0] = -127) :
err[0] >= +254 ? (err[0] = +127) : (err[0] /= 2));
err[1] -= irgb[2];
dth[1] = (err[1] <= -254 ? (err[1] = -127) :
err[1] >= +254 ? (err[1] = +127) : (err[1] /= 2));
err[2] -= irgb[3];
dth[2] = (err[2] <= -254 ? (err[2] = -127) :
err[2] >= +254 ? (err[2] = +127) : (err[2] /= 2));
(*buf) += 3;
return irgb[0];
}
/*------------------------------------------------------------------------------
* 4 planes interleaved words format
*/
static void
raster_I4 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
#if 1
BYTE * dth = info->DthBuf;
WORD err[3] = { 0, 0, 0 };
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
UWORD idx = info->RowBuf[x >>16];
*(tmp++) = dither_true ((CHAR*)&info->Pixel[idx] +1, err, &dth);
#else
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
UWORD idx = info->RowBuf[x >>16];
*(tmp++) = *(CHAR*)&info->Pixel[idx];
#endif
if (!--width || !--n) {
raster_chunk4 (buf, dst, tmp - buf);
dst += 4;
n = 16;
tmp = buf;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_I4 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
BYTE * dth = info->DthBuf;
WORD err = 0;
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
*(tmp++) = dither_gray ((CHAR*)&info->RowBuf[x >>16], &err, &dth);
if (!--width || !--n) {
raster_chunk4 (buf, dst, tmp - buf);
dst += 4;
n = 16;
tmp = buf;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
dither_I4 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
BYTE * dth = info->DthBuf;
WORD err[3] = { 0, 0, 0 };
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
*(tmp++) = dither_true ((CHAR*)&info->RowBuf[(x >>16) *3], err, &dth);
if (!--width || !--n) {
raster_chunk4 (buf, dst, tmp - buf);
dst += 4;
n = 16;
tmp = buf;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------
* 8 planes interleaved words format
*/
static void
raster_I8 (IMGINFO info, void * _dst)
{
#if defined(__GNUC__) && !defined(__mcoldfire__)
size_t x = (info->IncXfx +1) /2;
__asm__ volatile (
" subq.w #1, %4\n"
" swap %6 | -> chunk counter\n"
"1: | line loop\n"
" clr.w %6\n"
" clr.l d4\n"
" clr.l d5\n"
" clr.l d6\n"
" clr.l d7\n"
"5: | chunk loop\n"
" swap %4 | -> value\n"
" swap %6 | -> mask\n"
" move.w (%3), d3\n"
" add.l %5, (%3)\n"
" move.b (d3.w,%1), d3 | palette index\n"
" and.w %6, d3\n"
" lsl.w #2, d3\n"
" move.b (d3.w,%2), %4 | pixel value\n"
" swap %6 | -> chunk counter\n"
" moveq.l #0x03, d3 |chunks 0/1\n"
" and.b %4, d3\n"
" ror.l #1, d3\n"
" ror.w #1, d3\n"
" lsr.l %6, d3\n"
" or.l d3, d4\n"
" moveq.l #0x0C, d3 |chunks 2/3\n"
" and.b %4, d3\n"
" ror.l #3, d3\n"
" ror.w #1, d3\n"
" lsr.l %6, d3\n"
" or.l d3, d5\n"
" moveq.l #0x30, d3 |chunks 4/5\n"
" and.b %4, d3\n"
" ror.l #5, d3\n"
" ror.w #1, d3\n"
" lsr.l %6, d3\n"
" or.l d3, d6\n"
" move.l #0xC0, d3 |chunks 6/7\n"
" and.b %4, d3\n"
" ror.l #7, d3\n"
" ror.w #1, d3\n"
" lsr.l %6, d3\n"
" or.l d3, d7\n"
" swap %4 | -> width\n"
" addq.b #1, %6\n"
" btst.b #4, %6\n"
" dbne %4, 5b | chunk loop\n"
" movem.l d4-d7, (%0)\n"
" adda.w #16, %0\n"
" subq.w #1, %4\n"
" bpl.b 1b"
:
: "a"(_dst),"a"(info->RowBuf),"a"(info->Pixel),"a"(&x),
/* %0 %1 %2 %3 */
"d"(info->DthWidth),"d"(info->IncXfx),"d"(info->PixMask)
/* %4 %5 %6 */
: "d3","d4","d5","d6","d7"
);
#elif defined(__PUREC__)
extern void pc_raster_I8 (void *, void *, void *, short, size_t, UWORD);
pc_raster_I8 (_dst, info->RowBuf, info->Pixel,
info->DthWidth, info->IncXfx, info->PixMask);
#else
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
UWORD idx = info->RowBuf[x >>16];
*(tmp++) = *(CHAR*)&info->Pixel[idx];
if (!--width || !--n) {
raster_chunk8 (buf, dst, tmp - buf);
dst += 8;
n = 16;
tmp = buf;
}
x += info->IncXfx;
} while (width);
#endif
}
/*------------------------------------------------------------------------------*/
static void
gscale_I8 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
BYTE * dth = info->DthBuf;
WORD err = 0;
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
*(tmp++) = dither_gray ((CHAR*)&info->RowBuf[x >>16], &err, &dth);
if (!--width || !--n) {
raster_chunk8 (buf, dst, tmp - buf);
dst += 8;
n = 16;
tmp = buf;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------*/
static void
dither_I8 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
BYTE * dth = info->DthBuf;
WORD err[3] = { 0, 0, 0 };
CHAR buf[16];
short n = 16;
CHAR * tmp = buf;
do {
*(tmp++) = dither_true ((CHAR*)&info->RowBuf[(x >>16) *3], err, &dth);
if (!--width || !--n) {
raster_chunk8 (buf, dst, tmp - buf);
dst += 8;
n = 16;
tmp = buf;
}
x += info->IncXfx;
} while (width);
}
/*------------------------------------------------------------------------------
* 8 planes packed pixels formart.
*/
static void
raster_P8 (IMGINFO info, void * _dst)
{
CHAR * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
do {
*(dst++) = *(CHAR*)&map[(short)info->RowBuf[x >>16] & mask];
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_P8 (IMGINFO info, void * _dst)
{
CHAR * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
BYTE * dth = info->DthBuf;
WORD err = 0;
do {
*(dst++) = dither_gray ((CHAR*)&info->RowBuf[x >>16], &err, &dth);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
dither_P8 (IMGINFO info, void * _dst)
{
CHAR * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
BYTE * dth = info->DthBuf;
WORD err[3] = { 0, 0, 0 };
do {
*(dst++) = dither_true ((CHAR*)&info->RowBuf[(x >>16) *3], err, &dth);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------
* 15 planes packed pixels formart, the pixel index array must contain 15bit RGB
* values.
*/
static void
raster_15 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
do {
*(dst++) = map[(short)info->RowBuf[x >>16] & mask];
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_15 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
do {
UWORD rgb = info->RowBuf[(x >>16)];
*(dst++) = ((rgb & 0xF8) <<7) | ((rgb & 0xF8) <<2) | (rgb >>3);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
dither_15 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
do {
CHAR * rgb = &info->RowBuf[(x >>16) *3];
*(dst++) = (((UWORD)rgb[0] & 0xF8) <<7)
| (((UWORD)rgb[1] & 0xF8) <<2)
| (rgb[2] >>3);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------
* 15 planes packed pixels formart in wrong (intel) byte order, the pixel index
* array must contain 15bit RGB values.
*/
static void
raster_15r (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
do {
UWORD rgb = map[(short)info->RowBuf[x >>16] & mask];
*(dst++) = (rgb >> 8) | (rgb << 8);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_15r (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
do {
UWORD rgb = info->RowBuf[(x >>16)];
rgb = ((rgb & 0xF8) <<7) | ((rgb & 0xF8) <<2) | (rgb >>3);
*(dst++) = (rgb >> 8) | (rgb << 8);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
dither_15r (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
do {
CHAR * rgb = &info->RowBuf[(x >>16) *3];
UWORD pix = (((UWORD)rgb[0] & 0xF8) <<7)
| (((UWORD)rgb[1] & 0xF8) <<2)
| (rgb[2] >>3);
*(dst++) = (pix >> 8) | (pix << 8);
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------
* 16 planes packed pixels formart, the pixel index array must contain 16bit RGB
* values.
*/
static void
raster_16 (IMGINFO info, void * _dst)
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
ULONG * map = info->Pixel;
UWORD mask = info->PixMask;
do {
*(dst++) = map[(short)info->RowBuf[x >>16] & mask];
x += info->IncXfx;
} while (--width);
}
/*------------------------------------------------------------------------------*/
static void
gscale_16 (IMGINFO info, void * _dst)
{
#if defined (__GNUC__) && !defined(__mcoldfire__)
if (info->IncXfx == 0x00010000uL) {
__asm__ volatile (
" subq.l #1, %2\n"
" lsr.l #1, %2\n"
"1:\n"
" clr.l d0\n"
" move.w (%0)+, d0 |........:........|12345678:12345678|\n"
" lsl.l #8, d0 |........:12345678|12345678:........|\n"
" lsr.w #8, d0 |........:12345678|........:12345678|\n"
" move.l d0, d1\n"
" lsr.l #2, d0 |........:..123456|78......:..123456|\n"
" andi.w #0x3F, d0 |........:..123456|........:..123456|\n"
" lsl.l #5, d0 |.....123:456.....|.....123:456.....|\n"
" lsr.l #3, d1 |........:...12345|678.....:...12345|\n"
" andi.w #0x1F, d1 |........:...12345|........:...12345|\n"
" or.l d1, d0\n"
" lsl.l #8, d1 |...12345:........|...12345:........|\n"
" lsl.l #3, d1 |12345...:........|12345...:........|\n"
" or.l d1, d0\n"
" move.l d0, (%1)+\n"
" dbra %2, 1b"
: /* no return */
: "a"(info->RowBuf),"a"(_dst), "d"((long)info->DthWidth)
/* %0 %1 %2 */
: "d0","d1","d2"
);
} else
#endif
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
do {
#if defined (__GNUC__) && !defined(__mcoldfire__)
__asm__ volatile (
" move.b (%0), d0\n"
" move.b d0, d1\n"
" lsl.w #5, d0\n"
" move.b d1, d0\n"
" lsl.l #6, d0\n"
" move.b d1, d0\n"
" lsr.l #3, d0\n"
" move.w d0, (%1)"
: /* no return */
: "a"(&info->RowBuf[x >>16]),"a"(dst++)
: "d0","d1"
);
#else
UWORD rgb = info->RowBuf[(x >>16)];
*(dst++) = ((rgb & 0xF8) <<8) | ((rgb & 0xFC) <<3) | (rgb >>3);
#endif
x += info->IncXfx;
} while (--width);
}}
/*------------------------------------------------------------------------------*/
static void
dither_16 (IMGINFO info, void * _dst)
{
#if defined (__GNUC__) && !defined(__mcoldfire__)
if (info->IncXfx == 0x00010000uL) {
__asm__ volatile (
" subq.l #1, %2\n"
" lsr.l #1, %2\n"
"1:\n"
" movem.w (%0), d0/d1/d2 |R8:G8| / |B8:r8| / |g8:b8|\n"
" addq.l #6, %0\n"
" lsl.l #5, d0 |........:...RRRRR|RRRGGGGG:GGG00000|\n"
" lsl.w #3, d0 |........:...RRRRR|GGGGGGGG:00000000|\n"
" lsl.l #6, d0 |.....RRR:RRGGGGGG|GG000000:00000000|\n"
" move.w d1, d0 |.....RRR:RRGGGGGG|BBBBBBBB:rrrrrrrr|\n"
" lsl.l #5, d0 |RRRRRGGG:GGGBBBBB|BBBrrrrr:rrr00000|\n"
" move.w d0, d1 |........:........|BBBrrrrr:rrr00000|\n"
" lsl.l #8, d1 |........:BBBrrrrr|rrr00000:00000000|\n"
" move.w d2, d1 |........:BBBrrrrr|gggggggg:bbbbbbbb|\n"
" lsl.l #6, d1 |..BBBrrr:rrgggggg|ggbbbbbb:bb000000|\n"
" lsl.w #2, d1 |..BBBrrr:rrgggggg|bbbbbbbb:00000000|\n"
" lsl.l #5, d1 |rrrrrggg:gggbbbbb|bbb00000:00000000|\n"
" swap d1\n"
" move.w d1, d0\n"
" move.l d0, (%1)+\n"
" dbra %2, 1b"
: /* no return */
: "a"(info->RowBuf),"a"(_dst), "d"(info->DthWidth)
/* %0 %1 %2 */
: "d0","d1","d2"
);
} else
#endif
{
UWORD * dst = _dst;
short width = info->DthWidth;
size_t x = (info->IncXfx +1) /2;
do {
#if defined (__GNUC__) && !defined(__mcoldfire__)
__asm__ volatile (
" move.b (%0)+, d0\n"