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#define __NR_COMPOSE_TRANSFORM_C__
/*
* Pixel buffer rendering library
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* This code is in public domain
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "nr-pixops.h"
#include "nr-matrix.h"
#ifdef WITH_MMX
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* fixme: */
int nr_have_mmx (void);
void nr_mmx_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_0 (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const long *FFd2s, unsigned int alpha);
void nr_mmx_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_n (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const long *FFd2s, const long *FF_S, unsigned int alpha, int dbits);
#define NR_PIXOPS_MMX (1 && nr_have_mmx ())
#ifdef __cplusplus
}
#endif //__cplusplus
#endif
/* fixme: Implement missing (Lauris) */
/* fixme: PREMUL colors before calculating average (Lauris) */
/* Fixed point precision */
#define FBITS 12
void nr_R8G8B8A8_N_EMPTY_R8G8B8A8_N_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd);
void nr_R8G8B8A8_N_EMPTY_R8G8B8A8_P_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd);
void nr_R8G8B8A8_P_EMPTY_R8G8B8A8_N_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd);
void nr_R8G8B8A8_P_EMPTY_R8G8B8A8_P_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd);
void
nr_R8G8B8A8_N_R8G8B8A8_N_R8G8B8A8_N_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd)
{
int xsize, ysize, size, dbits;
long FFs_x_x, FFs_x_y, FFs_y_x, FFs_y_y, FFs__x, FFs__y;
long FFs_x_x_S, FFs_x_y_S, FFs_y_x_S, FFs_y_y_S;
/* Subpixel positions */
int FF_sx_S[256];
int FF_sy_S[256];
unsigned char *d0;
int FFsx0, FFsy0;
int x, y;
if (alpha == 0) return;
xsize = (1 << xd);
ysize = (1 << yd);
size = xsize * ysize;
dbits = xd + yd;
/* Set up fixed point matrix */
FFs_x_x = (long) (d2s[0] * (1 << FBITS) + 0.5);
FFs_x_y = (long) (d2s[1] * (1 << FBITS) + 0.5);
FFs_y_x = (long) (d2s[2] * (1 << FBITS) + 0.5);
FFs_y_y = (long) (d2s[3] * (1 << FBITS) + 0.5);
FFs__x = (long) (d2s[4] * (1 << FBITS) + 0.5);
FFs__y = (long) (d2s[5] * (1 << FBITS) + 0.5);
FFs_x_x_S = FFs_x_x >> xd;
FFs_x_y_S = FFs_x_y >> xd;
FFs_y_x_S = FFs_y_x >> yd;
FFs_y_y_S = FFs_y_y >> yd;
/* Set up subpixel matrix */
/* fixme: We can calculate that in floating point (Lauris) */
for (y = 0; y < ysize; y++) {
for (x = 0; x < xsize; x++) {
FF_sx_S[y * xsize + x] = FFs_x_x_S * x + FFs_y_x_S * y;
FF_sy_S[y * xsize + x] = FFs_x_y_S * x + FFs_y_y_S * y;
}
}
d0 = px;
FFsx0 = FFs__x;
FFsy0 = FFs__y;
for (y = 0; y < h; y++) {
unsigned char *d;
long FFsx, FFsy;
d = d0;
FFsx = FFsx0;
FFsy = FFsy0;
for (x = 0; x < w; x++) {
unsigned int r, g, b, a;
long sx, sy;
int i;
r = g = b = a = 0;
for (i = 0; i < size; i++) {
sx = (FFsx + FF_sx_S[i]) >> FBITS;
if ((sx >= 0) && (sx < sw)) {
sy = (FFsy + FF_sy_S[i]) >> FBITS;
if ((sy >= 0) && (sy < sh)) {
const unsigned char *s;
unsigned int ca;
s = spx + sy * srs + sx * 4;
ca = NR_PREMUL (s[3], alpha);
r += NR_PREMUL (s[0], ca);
g += NR_PREMUL (s[1], ca);
b += NR_PREMUL (s[2], ca);
a += ca;
}
}
}
a >>= dbits;
if (a != 0) {
r = r >> dbits;
g = g >> dbits;
b = b >> dbits;
if (a == 255) {
/* Transparent BG, premul src */
d[0] = r;
d[1] = g;
d[2] = b;
d[3] = a;
} else {
unsigned int ca;
/* Full composition */
ca = 65025 - (255 - a) * (255 - d[3]);
d[0] = NR_COMPOSENNN_A7 (r, a, d[0], d[3], ca);
d[1] = NR_COMPOSENNN_A7 (g, a, d[1], d[3], ca);
d[2] = NR_COMPOSENNN_A7 (b, a, d[2], d[3], ca);
d[3] = (ca + 127) / 255;
}
}
/* Advance pointers */
FFsx += FFs_x_x;
FFsy += FFs_x_y;
d += 4;
}
FFsx0 += FFs_y_x;
FFsy0 += FFs_y_y;
d0 += rs;
}
}
void nr_R8G8B8A8_N_R8G8B8A8_N_R8G8B8A8_P_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd);
static void
nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_0 (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const long *FFd2s, unsigned int alpha)
{
unsigned char *d0;
int FFsx0, FFsy0;
int x, y;
d0 = px;
FFsx0 = FFd2s[4];
FFsy0 = FFd2s[5];
for (y = 0; y < h; y++) {
unsigned char *d;
long FFsx, FFsy;
d = d0;
FFsx = FFsx0;
FFsy = FFsy0;
for (x = 0; x < w; x++) {
long sx, sy;
sx = FFsx >> FBITS;
if ((sx >= 0) && (sx < sw)) {
sy = FFsy >> FBITS;
if ((sy >= 0) && (sy < sh)) {
const unsigned char *s;
unsigned int a;
s = spx + sy * srs + sx * 4;
a = NR_PREMUL (s[3], alpha);
if (a != 0) {
if ((a == 255) || (d[3] == 0)) {
/* Transparent BG, premul src */
d[0] = NR_PREMUL (s[0], a);
d[1] = NR_PREMUL (s[1], a);
d[2] = NR_PREMUL (s[2], a);
d[3] = a;
} else {
d[0] = NR_COMPOSENPP (s[0], a, d[0], d[3]);
d[1] = NR_COMPOSENPP (s[1], a, d[1], d[3]);
d[2] = NR_COMPOSENPP (s[2], a, d[2], d[3]);
d[3] = (65025 - (255 - a) * (255 - d[3]) + 127) / 255;
}
}
}
}
/* Advance pointers */
FFsx += FFd2s[0];
FFsy += FFd2s[1];
d += 4;
}
FFsx0 += FFd2s[2];
FFsy0 += FFd2s[3];
d0 += rs;
}
}
static void
nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_n (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const long *FFd2s, const long *FF_S, unsigned int alpha, int dbits)
{
int size;
unsigned char *d0;
int FFsx0, FFsy0;
int x, y;
size = (1 << dbits);
unsigned alpha_rounding_fix = size * 255;
unsigned rgb_rounding_fix = size * (255 * 256);
if (alpha > 127) ++alpha;
d0 = px;
FFsx0 = FFd2s[4];
FFsy0 = FFd2s[5];
for (y = 0; y < h; y++) {
unsigned char *d;
long FFsx, FFsy;
d = d0;
FFsx = FFsx0;
FFsy = FFsy0;
for (x = 0; x < w; x++) {
unsigned int r, g, b, a;
int i;
r = g = b = a = 0;
for (i = 0; i < size; i++) {
long sx, sy;
sx = (FFsx + FF_S[2 * i]) >> FBITS;
if ((sx >= 0) && (sx < sw)) {
sy = (FFsy + FF_S[2 * i + 1]) >> FBITS;
if ((sy >= 0) && (sy < sh)) {
const unsigned char *s;
unsigned int ca;
s = spx + sy * srs + sx * 4;
ca = s[3] * alpha;
r += s[0] * ca;
g += s[1] * ca;
b += s[2] * ca;
a += ca;
}
}
}
a = (a + alpha_rounding_fix) >> (8 + dbits);
if (a != 0) {
r = (r + rgb_rounding_fix) >> (16 + dbits);
g = (g + rgb_rounding_fix) >> (16 + dbits);
b = (b + rgb_rounding_fix) >> (16 + dbits);
if ((a == 255) || (d[3] == 0)) {
/* Transparent BG, premul src */
d[0] = r;
d[1] = g;
d[2] = b;
d[3] = a;
} else {
d[0] = NR_COMPOSEPPP (r, a, d[0], d[3]);
d[1] = NR_COMPOSEPPP (g, a, d[1], d[3]);
d[2] = NR_COMPOSEPPP (b, a, d[2], d[3]);
d[3] = (65025 - (255 - a) * (255 - d[3]) + 127) / 255;
}
}
/* Advance pointers */
FFsx += FFd2s[0];
FFsy += FFd2s[1];
d += 4;
}
FFsx0 += FFd2s[2];
FFsy0 += FFd2s[3];
d0 += rs;
}
}
void nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd)
{
int dbits;
long FFd2s[6];
int i;
if (alpha == 0) return;
dbits = xd + yd;
for (i = 0; i < 6; i++) {
FFd2s[i] = (long) (d2s[i] * (1 << FBITS) + 0.5);
}
if (dbits == 0) {
#ifdef WITH_MMX
if (NR_PIXOPS_MMX) {
/* WARNING: MMX composer REQUIRES w > 0 and h > 0 */
nr_mmx_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_0 (px, w, h, rs, spx, sw, sh, srs, FFd2s, alpha);
return;
}
#endif
nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_0 (px, w, h, rs, spx, sw, sh, srs, FFd2s, alpha);
} else {
int xsize, ysize;
long FFs_x_x_S, FFs_x_y_S, FFs_y_x_S, FFs_y_y_S;
long FF_S[2 * 256];
int x, y;
xsize = (1 << xd);
ysize = (1 << yd);
FFs_x_x_S = FFd2s[0] >> xd;
FFs_x_y_S = FFd2s[1] >> xd;
FFs_y_x_S = FFd2s[2] >> yd;
FFs_y_y_S = FFd2s[3] >> yd;
/* Set up subpixel matrix */
/* fixme: We can calculate that in floating point (Lauris) */
for (y = 0; y < ysize; y++) {
for (x = 0; x < xsize; x++) {
FF_S[2 * (y * xsize + x)] = FFs_x_x_S * x + FFs_y_x_S * y;
FF_S[2 * (y * xsize + x) + 1] = FFs_x_y_S * x + FFs_y_y_S * y;
}
}
#ifdef WITH_MMX
if (NR_PIXOPS_MMX) {
/* WARNING: MMX composer REQUIRES w > 0 and h > 0 */
nr_mmx_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_n (px, w, h, rs, spx, sw, sh, srs, FFd2s, FF_S, alpha, dbits);
return;
}
#endif
nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_N_TRANSFORM_n (px, w, h, rs, spx, sw, sh, srs, FFd2s, FF_S, alpha, dbits);
}
}
void nr_R8G8B8A8_P_R8G8B8A8_P_R8G8B8A8_P_TRANSFORM (unsigned char *px, int w, int h, int rs,
const unsigned char *spx, int sw, int sh, int srs,
const NR::Matrix &d2s, unsigned int alpha, int xd, int yd);
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