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Pillow/libImaging/Paste.c
Alex Clark bb1b3a532c Cleanup WS, courtesy of @Arfrever 
find * -type f "-(" -name "*.bdf" -o -name "*.c" -o -name "*.h" -o -name "*.py" -o -name "*.rst" -o -name "*.txt" "-)" -exec sed -e "s/[[:space:]]*$//" -i {} \;
2013-06-30 18:42:19 -04:00

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/*
* The Python Imaging Library
* $Id$
*
* paste image on another image
*
* history:
* 96-03-27 fl Created
* 96-07-16 fl Support "1", "L" and "RGBA" masks
* 96-08-16 fl Merged with opaque paste
* 97-01-17 fl Faster blending, added support for RGBa images
* 97-08-27 fl Faster masking for 32-bit images
* 98-02-02 fl Fixed MULDIV255 macro for gcc
* 99-02-02 fl Added "RGBa" mask support
* 99-02-06 fl Rewritten. Added support for masked fill operations.
* 99-12-08 fl Fixed matte fill.
*
* Copyright (c) Fredrik Lundh 1996-97.
* Copyright (c) Secret Labs AB 1997-99.
*
* See the README file for information on usage and redistribution.
*/
#include "Imaging.h"
/* like (a * b + 127) / 255), but much faster on most platforms */
#define MULDIV255NEW(a, b, tmp)\
(tmp = (a) * (b) + 128, ((((tmp) >> 8) + (tmp)) >> 8))
#define MULDIV255OLD(a, b, tmp)\
(((a) * (b) + 127) / 255)
#define MULDIV255 MULDIV255NEW
#define BLEND(mask, in1, in2, tmp1, tmp2)\
(MULDIV255(in1, 255 - mask, tmp1) + MULDIV255(in2, mask, tmp2))
#define PREBLEND(mask, in1, in2, tmp1)\
(MULDIV255(in1, 255 - mask, tmp1) + in2)
static inline void
paste(Imaging imOut, Imaging imIn, int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* paste opaque region */
int y;
dx *= pixelsize;
sx *= pixelsize;
xsize *= pixelsize;
for (y = 0; y < ysize; y++)
memcpy(imOut->image[y+dy]+dx, imIn->image[y+sy]+sx, xsize);
}
static inline void
paste_mask_1(Imaging imOut, Imaging imIn, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* paste with mode "1" mask */
int x, y;
if (imOut->image8) {
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* in = imIn->image8[y+sy]+sx;
UINT8* mask = imMask->image8[y+sy]+sx;
for (x = 0; x < xsize; x++) {
if (*mask++)
*out = *in;
out++, in++;
}
}
} else {
for (y = 0; y < ysize; y++) {
INT32* out = imOut->image32[y+dy]+dx;
INT32* in = imIn->image32[y+sy]+sx;
UINT8* mask = imMask->image8[y+sy]+sx;
for (x = 0; x < xsize; x++) {
if (*mask++)
*out = *in;
out++, in++;
}
}
}
}
static inline void
paste_mask_L(Imaging imOut, Imaging imIn, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* paste with mode "L" matte */
int x, y, i;
unsigned int tmp1, tmp2;
if (imOut->image8) {
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* in = imIn->image8[y+sy]+sx;
UINT8* mask = imMask->image8[y+sy]+sx;
for (x = 0; x < xsize; x++) {
*out = BLEND(*mask, *out, *in, tmp1, tmp2);
out++, in++, mask++;
}
}
} else {
for (y = 0; y < ysize; y++) {
UINT8* out = (UINT8*) imOut->image[y+dy]+dx*pixelsize;
UINT8* in = (UINT8*) imIn->image[y+sy]+sx*pixelsize;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx;
for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) {
*out = BLEND(*mask, *out, *in, tmp1, tmp2);
out++, in++;
}
mask++;
}
}
}
}
static inline void
paste_mask_RGBA(Imaging imOut, Imaging imIn, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* paste with mode "RGBA" matte */
int x, y, i;
unsigned int tmp1, tmp2;
if (imOut->image8) {
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* in = imIn->image8[y+sy]+sx;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx*4+3;
for (x = 0; x < xsize; x++) {
*out = BLEND(*mask, *out, *in, tmp1, tmp2);
out++, in++, mask += 4;
}
}
} else {
for (y = 0; y < ysize; y++) {
UINT8* out = (UINT8*) imOut->image[y+dy]+dx*pixelsize;
UINT8* in = (UINT8*) imIn->image[y+sy]+sx*pixelsize;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx*4+3;
for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) {
*out = BLEND(*mask, *out, *in, tmp1, tmp2);
out++, in++;
}
mask += 4;
}
}
}
}
static inline void
paste_mask_RGBa(Imaging imOut, Imaging imIn, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* paste with mode "RGBa" matte */
int x, y, i;
unsigned int tmp1;
if (imOut->image8) {
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* in = imIn->image8[y+sy]+sx;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx*4+3;
for (x = 0; x < xsize; x++) {
*out = PREBLEND(*mask, *out, *in, tmp1);
out++, in++, mask += 4;
}
}
} else {
for (y = 0; y < ysize; y++) {
UINT8* out = (UINT8*) imOut->image[y+dy]+dx*pixelsize;
UINT8* in = (UINT8*) imIn->image[y+sy]+sx*pixelsize;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx*4+3;
for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) {
*out = PREBLEND(*mask, *out, *in, tmp1);
out++, in++;
}
mask += 4;
}
}
}
}
int
ImagingPaste(Imaging imOut, Imaging imIn, Imaging imMask,
int dx0, int dy0, int dx1, int dy1)
{
int xsize, ysize;
int pixelsize;
int sx0, sy0;
ImagingSectionCookie cookie;
if (!imOut || !imIn) {
(void) ImagingError_ModeError();
return -1;
}
pixelsize = imOut->pixelsize;
xsize = dx1 - dx0;
ysize = dy1 - dy0;
if (xsize != imIn->xsize || ysize != imIn->ysize ||
pixelsize != imIn->pixelsize) {
(void) ImagingError_Mismatch();
return -1;
}
if (imMask && (xsize != imMask->xsize || ysize != imMask->ysize)) {
(void) ImagingError_Mismatch();
return -1;
}
/* Determine which region to copy */
sx0 = sy0 = 0;
if (dx0 < 0)
xsize += dx0, sx0 = -dx0, dx0 = 0;
if (dx0 + xsize > imOut->xsize)
xsize = imOut->xsize - dx0;
if (dy0 < 0)
ysize += dy0, sy0 = -dy0, dy0 = 0;
if (dy0 + ysize > imOut->ysize)
ysize = imOut->ysize - dy0;
if (xsize <= 0 || ysize <= 0)
return 0;
if (!imMask) {
ImagingSectionEnter(&cookie);
paste(imOut, imIn, dx0, dy0, sx0, sy0, xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "1") == 0) {
ImagingSectionEnter(&cookie);
paste_mask_1(imOut, imIn, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "L") == 0) {
ImagingSectionEnter(&cookie);
paste_mask_L(imOut, imIn, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "RGBA") == 0) {
ImagingSectionEnter(&cookie);
paste_mask_RGBA(imOut, imIn, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "RGBa") == 0) {
ImagingSectionEnter(&cookie);
paste_mask_RGBa(imOut, imIn, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else {
(void) ImagingError_ValueError("bad transparency mask");
return -1;
}
return 0;
}
static inline void
fill(Imaging imOut, const void* ink_, int dx, int dy,
int xsize, int ysize, int pixelsize)
{
/* fill opaque region */
int x, y;
UINT8 ink8 = 0;
INT32 ink32 = 0L;
memcpy(&ink32, ink_, pixelsize);
memcpy(&ink8, ink_, sizeof(ink8));
if (imOut->image8 || ink32 == 0L) {
dx *= pixelsize;
xsize *= pixelsize;
for (y = 0; y < ysize; y++)
memset(imOut->image[y+dy]+dx, ink8, xsize);
} else {
for (y = 0; y < ysize; y++) {
INT32* out = imOut->image32[y+dy]+dx;
for (x = 0; x < xsize; x++)
out[x] = ink32;
}
}
}
static inline void
fill_mask_1(Imaging imOut, const void* ink_, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* fill with mode "1" mask */
int x, y;
UINT8 ink8 = 0;
INT32 ink32 = 0L;
memcpy(&ink32, ink_, pixelsize);
memcpy(&ink8, ink_, sizeof(ink8));
if (imOut->image8) {
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* mask = imMask->image8[y+sy]+sx;
for (x = 0; x < xsize; x++) {
if (*mask++)
*out = ink8;
out++;
}
}
} else {
for (y = 0; y < ysize; y++) {
INT32* out = imOut->image32[y+dy]+dx;
UINT8* mask = imMask->image8[y+sy]+sx;
for (x = 0; x < xsize; x++) {
if (*mask++)
*out = ink32;
out++;
}
}
}
}
static inline void
fill_mask_L(Imaging imOut, const UINT8* ink, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* fill with mode "L" matte */
int x, y, i;
unsigned int tmp1, tmp2;
if (imOut->image8) {
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* mask = imMask->image8[y+sy]+sx;
for (x = 0; x < xsize; x++) {
*out = BLEND(*mask, *out, ink[0], tmp1, tmp2);
out++, mask++;
}
}
} else {
for (y = 0; y < ysize; y++) {
UINT8* out = (UINT8*) imOut->image[y+dy]+dx*pixelsize;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx;
for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) {
*out = BLEND(*mask, *out, ink[i], tmp1, tmp2);
out++;
}
mask++;
}
}
}
}
static inline void
fill_mask_RGBA(Imaging imOut, const UINT8* ink, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* fill with mode "RGBA" matte */
int x, y, i;
unsigned int tmp1, tmp2;
if (imOut->image8) {
sx = sx*4+3;
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx;
for (x = 0; x < xsize; x++) {
*out = BLEND(*mask, *out, ink[0], tmp1, tmp2);
out++, mask += 4;
}
}
} else {
dx *= pixelsize;
sx = sx*4 + 3;
for (y = 0; y < ysize; y++) {
UINT8* out = (UINT8*) imOut->image[y+dy]+dx;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx;
for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) {
*out = BLEND(*mask, *out, ink[i], tmp1, tmp2);
out++;
}
mask += 4;
}
}
}
}
static inline void
fill_mask_RGBa(Imaging imOut, const UINT8* ink, Imaging imMask,
int dx, int dy, int sx, int sy,
int xsize, int ysize, int pixelsize)
{
/* fill with mode "RGBa" matte */
int x, y, i;
unsigned int tmp1;
if (imOut->image8) {
sx = sx*4 + 3;
for (y = 0; y < ysize; y++) {
UINT8* out = imOut->image8[y+dy]+dx;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx;
for (x = 0; x < xsize; x++) {
*out = PREBLEND(*mask, *out, ink[0], tmp1);
out++, mask += 4;
}
}
} else {
dx *= pixelsize;
sx = sx*4 + 3;
for (y = 0; y < ysize; y++) {
UINT8* out = (UINT8*) imOut->image[y+dy]+dx;
UINT8* mask = (UINT8*) imMask->image[y+sy]+sx;
for (x = 0; x < xsize; x++) {
for (i = 0; i < pixelsize; i++) {
*out = PREBLEND(*mask, *out, ink[i], tmp1);
out++;
}
mask += 4;
}
}
}
}
int
ImagingFill2(Imaging imOut, const void* ink, Imaging imMask,
int dx0, int dy0, int dx1, int dy1)
{
ImagingSectionCookie cookie;
int xsize, ysize;
int pixelsize;
int sx0, sy0;
if (!imOut || !ink) {
(void) ImagingError_ModeError();
return -1;
}
pixelsize = imOut->pixelsize;
xsize = dx1 - dx0;
ysize = dy1 - dy0;
if (imMask && (xsize != imMask->xsize || ysize != imMask->ysize)) {
(void) ImagingError_Mismatch();
return -1;
}
/* Determine which region to fill */
sx0 = sy0 = 0;
if (dx0 < 0)
xsize += dx0, sx0 = -dx0, dx0 = 0;
if (dx0 + xsize > imOut->xsize)
xsize = imOut->xsize - dx0;
if (dy0 < 0)
ysize += dy0, sy0 = -dy0, dy0 = 0;
if (dy0 + ysize > imOut->ysize)
ysize = imOut->ysize - dy0;
if (xsize <= 0 || ysize <= 0)
return 0;
if (!imMask) {
ImagingSectionEnter(&cookie);
fill(imOut, ink, dx0, dy0, xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "1") == 0) {
ImagingSectionEnter(&cookie);
fill_mask_1(imOut, ink, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "L") == 0) {
ImagingSectionEnter(&cookie);
fill_mask_L(imOut, ink, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "RGBA") == 0) {
ImagingSectionEnter(&cookie);
fill_mask_RGBA(imOut, ink, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else if (strcmp(imMask->mode, "RGBa") == 0) {
ImagingSectionEnter(&cookie);
fill_mask_RGBa(imOut, ink, imMask, dx0, dy0, sx0, sy0,
xsize, ysize, pixelsize);
ImagingSectionLeave(&cookie);
} else {
(void) ImagingError_ValueError("bad transparency mask");
return -1;
}
return 0;
}
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