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jdcol565.c
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jdcol565.c
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/*
* jdcol565.c
*
* This file was part of the Independent JPEG Group's software:
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modifications:
* Copyright (C) 2013, Linaro Limited.
* Copyright (C) 2014-2015, D. R. Commander.
* For conditions of distribution and use, see the accompanying README.ijg
* file.
*
* This file contains output colorspace conversion routines.
*/
/* This file is included by jdcolor.c */
INLINE
LOCAL(void)
ycc_rgb565_convert_internal (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int y, cb, cr;
register JSAMPROW outptr;
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->output_width;
/* copy these pointers into registers if possible */
register JSAMPLE * range_limit = cinfo->sample_range_limit;
register int * Crrtab = cconvert->Cr_r_tab;
register int * Cbbtab = cconvert->Cb_b_tab;
register JLONG * Crgtab = cconvert->Cr_g_tab;
register JLONG * Cbgtab = cconvert->Cb_g_tab;
SHIFT_TEMPS
while (--num_rows >= 0) {
JLONG rgb;
unsigned int r, g, b;
inptr0 = input_buf[0][input_row];
inptr1 = input_buf[1][input_row];
inptr2 = input_buf[2][input_row];
input_row++;
outptr = *output_buf++;
if (PACK_NEED_ALIGNMENT(outptr)) {
y = GETJSAMPLE(*inptr0++);
cb = GETJSAMPLE(*inptr1++);
cr = GETJSAMPLE(*inptr2++);
r = range_limit[y + Crrtab[cr]];
g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS))];
b = range_limit[y + Cbbtab[cb]];
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
outptr += 2;
num_cols--;
}
for (col = 0; col < (num_cols >> 1); col++) {
y = GETJSAMPLE(*inptr0++);
cb = GETJSAMPLE(*inptr1++);
cr = GETJSAMPLE(*inptr2++);
r = range_limit[y + Crrtab[cr]];
g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS))];
b = range_limit[y + Cbbtab[cb]];
rgb = PACK_SHORT_565(r, g, b);
y = GETJSAMPLE(*inptr0++);
cb = GETJSAMPLE(*inptr1++);
cr = GETJSAMPLE(*inptr2++);
r = range_limit[y + Crrtab[cr]];
g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS))];
b = range_limit[y + Cbbtab[cb]];
rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
outptr += 4;
}
if (num_cols & 1) {
y = GETJSAMPLE(*inptr0);
cb = GETJSAMPLE(*inptr1);
cr = GETJSAMPLE(*inptr2);
r = range_limit[y + Crrtab[cr]];
g = range_limit[y + ((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS))];
b = range_limit[y + Cbbtab[cb]];
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
}
}
}
INLINE
LOCAL(void)
ycc_rgb565D_convert_internal (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
register int y, cb, cr;
register JSAMPROW outptr;
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->output_width;
/* copy these pointers into registers if possible */
register JSAMPLE * range_limit = cinfo->sample_range_limit;
register int * Crrtab = cconvert->Cr_r_tab;
register int * Cbbtab = cconvert->Cb_b_tab;
register JLONG * Crgtab = cconvert->Cr_g_tab;
register JLONG * Cbgtab = cconvert->Cb_g_tab;
JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK];
SHIFT_TEMPS
while (--num_rows >= 0) {
JLONG rgb;
unsigned int r, g, b;
inptr0 = input_buf[0][input_row];
inptr1 = input_buf[1][input_row];
inptr2 = input_buf[2][input_row];
input_row++;
outptr = *output_buf++;
if (PACK_NEED_ALIGNMENT(outptr)) {
y = GETJSAMPLE(*inptr0++);
cb = GETJSAMPLE(*inptr1++);
cr = GETJSAMPLE(*inptr2++);
r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
g = range_limit[DITHER_565_G(y +
((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS)), d0)];
b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
outptr += 2;
num_cols--;
}
for (col = 0; col < (num_cols >> 1); col++) {
y = GETJSAMPLE(*inptr0++);
cb = GETJSAMPLE(*inptr1++);
cr = GETJSAMPLE(*inptr2++);
r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
g = range_limit[DITHER_565_G(y +
((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS)), d0)];
b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
d0 = DITHER_ROTATE(d0);
rgb = PACK_SHORT_565(r, g, b);
y = GETJSAMPLE(*inptr0++);
cb = GETJSAMPLE(*inptr1++);
cr = GETJSAMPLE(*inptr2++);
r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
g = range_limit[DITHER_565_G(y +
((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS)), d0)];
b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
d0 = DITHER_ROTATE(d0);
rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
outptr += 4;
}
if (num_cols & 1) {
y = GETJSAMPLE(*inptr0);
cb = GETJSAMPLE(*inptr1);
cr = GETJSAMPLE(*inptr2);
r = range_limit[DITHER_565_R(y + Crrtab[cr], d0)];
g = range_limit[DITHER_565_G(y +
((int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
SCALEBITS)), d0)];
b = range_limit[DITHER_565_B(y + Cbbtab[cb], d0)];
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
}
}
}
INLINE
LOCAL(void)
rgb_rgb565_convert_internal (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
register JSAMPROW outptr;
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->output_width;
SHIFT_TEMPS
while (--num_rows >= 0) {
JLONG rgb;
unsigned int r, g, b;
inptr0 = input_buf[0][input_row];
inptr1 = input_buf[1][input_row];
inptr2 = input_buf[2][input_row];
input_row++;
outptr = *output_buf++;
if (PACK_NEED_ALIGNMENT(outptr)) {
r = GETJSAMPLE(*inptr0++);
g = GETJSAMPLE(*inptr1++);
b = GETJSAMPLE(*inptr2++);
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
outptr += 2;
num_cols--;
}
for (col = 0; col < (num_cols >> 1); col++) {
r = GETJSAMPLE(*inptr0++);
g = GETJSAMPLE(*inptr1++);
b = GETJSAMPLE(*inptr2++);
rgb = PACK_SHORT_565(r, g, b);
r = GETJSAMPLE(*inptr0++);
g = GETJSAMPLE(*inptr1++);
b = GETJSAMPLE(*inptr2++);
rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
outptr += 4;
}
if (num_cols & 1) {
r = GETJSAMPLE(*inptr0);
g = GETJSAMPLE(*inptr1);
b = GETJSAMPLE(*inptr2);
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
}
}
}
INLINE
LOCAL(void)
rgb_rgb565D_convert_internal (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
register JSAMPROW outptr;
register JSAMPROW inptr0, inptr1, inptr2;
register JDIMENSION col;
register JSAMPLE * range_limit = cinfo->sample_range_limit;
JDIMENSION num_cols = cinfo->output_width;
JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK];
SHIFT_TEMPS
while (--num_rows >= 0) {
JLONG rgb;
unsigned int r, g, b;
inptr0 = input_buf[0][input_row];
inptr1 = input_buf[1][input_row];
inptr2 = input_buf[2][input_row];
input_row++;
outptr = *output_buf++;
if (PACK_NEED_ALIGNMENT(outptr)) {
r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0++), d0)];
g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1++), d0)];
b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2++), d0)];
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
outptr += 2;
num_cols--;
}
for (col = 0; col < (num_cols >> 1); col++) {
r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0++), d0)];
g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1++), d0)];
b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2++), d0)];
d0 = DITHER_ROTATE(d0);
rgb = PACK_SHORT_565(r, g, b);
r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0++), d0)];
g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1++), d0)];
b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2++), d0)];
d0 = DITHER_ROTATE(d0);
rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(r, g, b));
WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
outptr += 4;
}
if (num_cols & 1) {
r = range_limit[DITHER_565_R(GETJSAMPLE(*inptr0), d0)];
g = range_limit[DITHER_565_G(GETJSAMPLE(*inptr1), d0)];
b = range_limit[DITHER_565_B(GETJSAMPLE(*inptr2), d0)];
rgb = PACK_SHORT_565(r, g, b);
*(INT16*)outptr = (INT16)rgb;
}
}
}
INLINE
LOCAL(void)
gray_rgb565_convert_internal (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
register JSAMPROW inptr, outptr;
register JDIMENSION col;
JDIMENSION num_cols = cinfo->output_width;
while (--num_rows >= 0) {
JLONG rgb;
unsigned int g;
inptr = input_buf[0][input_row++];
outptr = *output_buf++;
if (PACK_NEED_ALIGNMENT(outptr)) {
g = *inptr++;
rgb = PACK_SHORT_565(g, g, g);
*(INT16*)outptr = (INT16)rgb;
outptr += 2;
num_cols--;
}
for (col = 0; col < (num_cols >> 1); col++) {
g = *inptr++;
rgb = PACK_SHORT_565(g, g, g);
g = *inptr++;
rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(g, g, g));
WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
outptr += 4;
}
if (num_cols & 1) {
g = *inptr;
rgb = PACK_SHORT_565(g, g, g);
*(INT16*)outptr = (INT16)rgb;
}
}
}
INLINE
LOCAL(void)
gray_rgb565D_convert_internal (j_decompress_ptr cinfo,
JSAMPIMAGE input_buf, JDIMENSION input_row,
JSAMPARRAY output_buf, int num_rows)
{
register JSAMPROW inptr, outptr;
register JDIMENSION col;
register JSAMPLE * range_limit = cinfo->sample_range_limit;
JDIMENSION num_cols = cinfo->output_width;
JLONG d0 = dither_matrix[cinfo->output_scanline & DITHER_MASK];
while (--num_rows >= 0) {
JLONG rgb;
unsigned int g;
inptr = input_buf[0][input_row++];
outptr = *output_buf++;
if (PACK_NEED_ALIGNMENT(outptr)) {
g = *inptr++;
g = range_limit[DITHER_565_R(g, d0)];
rgb = PACK_SHORT_565(g, g, g);
*(INT16*)outptr = (INT16)rgb;
outptr += 2;
num_cols--;
}
for (col = 0; col < (num_cols >> 1); col++) {
g = *inptr++;
g = range_limit[DITHER_565_R(g, d0)];
rgb = PACK_SHORT_565(g, g, g);
d0 = DITHER_ROTATE(d0);
g = *inptr++;
g = range_limit[DITHER_565_R(g, d0)];
rgb = PACK_TWO_PIXELS(rgb, PACK_SHORT_565(g, g, g));
d0 = DITHER_ROTATE(d0);
WRITE_TWO_ALIGNED_PIXELS(outptr, rgb);
outptr += 4;
}
if (num_cols & 1) {
g = *inptr;
g = range_limit[DITHER_565_R(g, d0)];
rgb = PACK_SHORT_565(g, g, g);
*(INT16*)outptr = (INT16)rgb;
}
}
}