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gambas-source-code/main/lib/image/image.c
Benoît Minisini da664d19ff [GB.IMAGE] 
* NEW: Image.Mask is new method that mask the colors of an image with 
  another color, and that enhance the alpha channel with the alpha channel 
  of that another color.


git-svn-id: svn://localhost/gambas/trunk@2539 867c0c6c-44f3-4631-809d-bfa615b0a4ec
2009-12-29 11:56:43 +00:00

980 lines
21 KiB
C
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/***************************************************************************
image.c
(c) 2000-2009 Benoît Minisini <gambas@users.sourceforge.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************************/
#define __IMAGE_C
#include "c_color.h"
#include "image.h"
typedef
struct { unsigned char d[3]; } PACKED uint24;
//#define DEBUG_CONVERT
static int _default_format = GB_IMAGE_RGBA;
static inline unsigned char *GET_END_POINTER(GB_IMG *image)
{
return &image->data[IMAGE_size(image)];
}
static inline uint PREMUL(uint x)
{
uint a = x >> 24;
if (a == 0)
return 0;
else if (a == 0xFF)
return x;
uint t = (x & 0xff00ff) * a;
t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
t &= 0xff00ff;
x = ((x >> 8) & 0xff) * a;
x = (x + ((x >> 8) & 0xff) + 0x80);
x &= 0xff00;
x |= t | (a << 24);
return x;
}
static inline uint INV_PREMUL(uint p)
{
if (ALPHA(p) == 0)
return 0;
else if (ALPHA(p) == 0xFF)
return p;
else
return
((ALPHA(p) << 24)
| (((255*RED(p))/ ALPHA(p)) << 16)
| (((255*GREEN(p)) / ALPHA(p)) << 8)
| ((255*BLUE(p)) / ALPHA(p)));
}
static inline uint SWAP(uint p)
{
return RGBA(ALPHA(p), BLUE(p), GREEN(p), RED(p));
}
static inline uint SWAP_RED_BLUE(uint p)
{
return RGBA(BLUE(p), GREEN(p), RED(p), ALPHA(p));
}
static uint from_GB_COLOR(GB_COLOR col, int format)
{
col ^= 0xFF000000;
if (GB_IMAGE_FMT_IS_PREMULTIPLIED(format))
col = PREMUL(col);
if (GB_IMAGE_FMT_IS_SWAPPED(format))
col = SWAP(col);
if (GB_IMAGE_FMT_IS_RGBA(format))
col = SWAP_RED_BLUE(col);
return col;
}
static GB_COLOR to_GB_COLOR(uint col, int format)
{
if (GB_IMAGE_FMT_IS_RGBA(format))
col = SWAP_RED_BLUE(col);
if (GB_IMAGE_FMT_IS_SWAPPED(format))
col = SWAP(col);
if (GB_IMAGE_FMT_IS_PREMULTIPLIED(format))
col = INV_PREMUL(col);
return col ^ 0xFF000000;
}
static inline uint BGRA_to_format(uint col, int format)
{
if (GB_IMAGE_FMT_IS_PREMULTIPLIED(format))
col = PREMUL(col);
if (GB_IMAGE_FMT_IS_SWAPPED(format))
col = SWAP(col);
return col;
}
static inline uint BGRA_from_format(uint col, int format)
{
if (GB_IMAGE_FMT_IS_SWAPPED(format))
col = SWAP(col);
if (GB_IMAGE_FMT_IS_PREMULTIPLIED(format))
col = INV_PREMUL(col);
return col;
}
static inline bool is_valid(GB_IMG *img, int x, int y)
{
return !(x >= img->width || y >= img->height || x < 0 || y < 0);
}
static void free_image(GB_IMG *img, void *image)
{
//fprintf(stderr, "free_image: %p %p\n", img, img->data);
GB.Free(POINTER(&img->data));
}
static GB_IMG_OWNER _image_owner = {
"gb.image",
0,
free_image,
free_image,
NULL
};
// Only converts to the following formats:
// - GB_IMAGE_BGRA
// - GB_IMAGE_BGRX
// - GB_IMAGE_RGBA
// - GB_IMAGE_RGBX
static void convert_image(uchar *dst, int dst_format, uchar *src, int src_format, int w, int h)
{
unsigned char *s = src;
unsigned char *d = dst;
int len;
unsigned char *dm;
uint *p, *pm;
bool psrc, pdst;
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: src_format = %d dst_format = %d\n", src_format, dst_format);
#endif
len = w * h * sizeof(uint);
dm = &d[len];
psrc = GB_IMAGE_FMT_IS_PREMULTIPLIED(src_format);
src_format = GB_IMAGE_FMT_CLEAR_PREMULTIPLIED(src_format);
pdst = GB_IMAGE_FMT_IS_PREMULTIPLIED(dst_format);
dst_format = GB_IMAGE_FMT_CLEAR_PREMULTIPLIED(dst_format);
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: after: src_format = %d dst_format = %d\n", src_format, dst_format);
#endif
if (dst_format == GB_IMAGE_BGRA || dst_format == GB_IMAGE_BGRX)
{
switch (src_format)
{
case GB_IMAGE_BGRA: case GB_IMAGE_BGRX:
goto __0123;
case GB_IMAGE_ARGB: case GB_IMAGE_XRGB:
goto __3210;
case GB_IMAGE_RGBA: case GB_IMAGE_RGBX:
goto __2103;
case GB_IMAGE_ABGR: case GB_IMAGE_XBGR:
goto __1230;
case GB_IMAGE_BGR:
goto __012X;
case GB_IMAGE_RGB:
goto __210X;
}
}
else if (dst_format == GB_IMAGE_RGBA || dst_format == GB_IMAGE_RGBX)
{
switch (src_format)
{
case GB_IMAGE_RGBA: case GB_IMAGE_RGBX:
goto __0123;
case GB_IMAGE_ABGR: case GB_IMAGE_XBGR:
goto __3210;
case GB_IMAGE_BGRA: case GB_IMAGE_BGRX:
goto __2103;
case GB_IMAGE_ARGB: case GB_IMAGE_XRGB:
goto __1230;
case GB_IMAGE_RGB:
goto __012X;
case GB_IMAGE_BGR:
goto __210X;
}
}
__0123:
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: 0123\n");
#endif
memcpy(dst, src, len);
goto __PREMULTIPLIED;
__3210:
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: 3210\n");
#endif
while (d != dm)
{
d[0] = s[3];
d[1] = s[2];
d[2] = s[1];
d[3] = s[0];
s += 4;
d += 4;
}
goto __PREMULTIPLIED;
__2103:
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: 2103\n");
#endif
while (d != dm)
{
d[0] = s[2];
d[1] = s[1];
d[2] = s[0];
d[3] = s[3];
s += 4;
d += 4;
}
goto __PREMULTIPLIED;
__1230:
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: 1230\n");
#endif
while (d != dm)
{
d[0] = s[1];
d[1] = s[2];
d[2] = s[3];
d[3] = s[0];
s += 4;
d += 4;
}
goto __PREMULTIPLIED;
__012X:
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: 012X\n");
#endif
while (d != dm)
{
d[0] = s[0];
d[1] = s[1];
d[2] = s[2];
d[3] = 0xFF;
s += 3;
d += 4;
}
return;
__210X:
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: 210X\n");
#endif
while (d != dm)
{
d[0] = s[2];
d[1] = s[1];
d[2] = s[0];
d[3] = 0xFF;
s += 3;
d += 4;
}
return;
__PREMULTIPLIED:
if (psrc == pdst)
return;
p = (uint *)dst;
pm = (uint *)dm;
if (psrc)
{
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: premultiplied -> normal\n");
#endif
// convert premultiplied to normal
while (p != pm)
{
*p = INV_PREMUL(*p);
p++;
}
}
else
{
#ifdef DEBUG_CONVERT
fprintf(stderr, "convert_image: normal -> premultiplied\n");
#endif
// convert normal to premultiplied
while (p != pm)
{
*p = PREMUL(*p);
p++;
}
}
}
int IMAGE_size(GB_IMG *img)
{
return img->width * img->height * (GB_IMAGE_FMT_IS_24_BITS(img->format) ? 3 : 4);
}
void IMAGE_create(GB_IMG *img, int width, int height, int format)
{
GB_BASE save = img->ob;
CLEAR(img);
img->ob = save;
img->owner = &_image_owner;
if (width <= 0 || height <= 0)
return;
img->width = width;
img->height = height;
img->format = format;
GB.Alloc(POINTER(&img->data), IMAGE_size(img));
img->owner_handle = img->data;
}
void IMAGE_create_with_data(GB_IMG *img, int width, int height, int format, unsigned char *data)
{
IMAGE_create(img, width, height, format);
if (data)
memcpy(img->data, data, IMAGE_size(img));
}
void IMAGE_convert(GB_IMG *img, int dst_format)
{
uchar *data;
int src_format = img->format;
if (src_format == dst_format)
return;
//IMAGE_create(&tmp, img->width, img->height, format);
img->format = dst_format;
GB.Alloc(POINTER(&data), IMAGE_size(img));
convert_image(data, dst_format, img->data, src_format, img->width, img->height);
//GB.Free(POINTER(&img->data));
IMAGE_take(img, &_image_owner, data, img->width, img->height, data);
}
// Check if a temporary handle is needed, and create it if needed by calling the owner "temp" function
void *IMAGE_check(GB_IMG *img, GB_IMG_OWNER *temp_owner)
{
if (!img)
return NULL;
// If we already have the temporary handle, then do nothing
if (img->temp_owner == temp_owner)
return img->temp_handle;
// If somebody else has a temporary handle
if (img->temp_owner)
{
// release it only if it is not the owner
if (img->temp_owner != img->owner && img->temp_owner->release)
(*img->temp_owner->release)(img, img->temp_handle);
img->temp_handle = 0;
}
// Get the temporary handle
if (temp_owner)
{
// If we are the owner, we must use our owner handle as temporary handle
if (img->owner == temp_owner)
img->temp_handle = img->owner_handle;
// If we are not the owner, then we will have to create the temporary handle ourself
else
{
// Conversion can make gb.image the new owner and temporary owner
IMAGE_convert(img, temp_owner->format);
img->temp_handle = (*temp_owner->temp)(img);
}
}
// Become the temporary owner
img->temp_owner = temp_owner;
return img->temp_handle;
}
// Take ownership of the image
void IMAGE_take(GB_IMG *img, GB_IMG_OWNER *owner, void *owner_handle, int width, int height, unsigned char *data)
{
if (!img)
return;
// If we are already the owner with the same handle, then do nothing
if (img->owner == owner && img->owner_handle == owner_handle)
return;
// Release the old owner
//fprintf(stderr, "releasing image %p owned by %s\n", img, img->owner->name);
(*img->owner->free)(img, img->owner_handle);
// If we have the temporary handle too, then clean it as it is necessarily the same
if (img->temp_owner == img->owner)
{
img->temp_owner = NULL;
img->temp_handle = 0;
}
// Become the owner
img->owner = owner;
img->owner_handle = owner_handle;
// As we are now the owner, then we must have the temporary handle too
IMAGE_check(img, NULL);
img->temp_owner = owner;
img->temp_handle = owner_handle;
// Initialize the data
img->width = width;
img->height = height;
img->data = data;
if (owner && owner->format)
img->format = owner->format;
}
void IMAGE_delete(GB_IMG *img)
{
IMAGE_take(img, NULL, NULL, 0, 0, NULL);
img->format = 0;
}
#define GET_POINTER(_img, _p, _pm) \
uint *_p = (uint *)(_img)->data; \
uint *_pm = (uint *)GET_END_POINTER(_img);
void IMAGE_fill(GB_IMG *img, GB_COLOR col)
{
GET_POINTER(img, p, pm);
col = from_GB_COLOR(col, img->format);
while (p != pm)
*p++ = col;
}
// GB_IMAGE_RGB[APX] only
void IMAGE_make_gray(GB_IMG *img)
{
GET_POINTER(img, p, pm);
uint col;
uchar g;
while (p != pm)
{
col = BGRA_from_format(*p, img->format);
g = (((RED(col) + BLUE(col)) >> 1) + GREEN(col)) >> 1;
*p++ = BGRA_to_format(RGBA(g, g, g, ALPHA(col)), img->format);
}
}
GB_COLOR IMAGE_get_pixel(GB_IMG *img, int x, int y)
{
uint col;
if (!is_valid(img, x, y))
return (-1);
col = ((uint *)img->data)[y * img->width + x];
return to_GB_COLOR(col, img->format);
}
void IMAGE_set_pixel(GB_IMG *img, int x, int y, GB_COLOR col)
{
if (!is_valid(img, x, y))
return;
((uint *)img->data)[y * img->width + x] = from_GB_COLOR(col, img->format);
}
void IMAGE_replace(GB_IMG *img, GB_COLOR src, GB_COLOR dst, bool noteq)
{
GET_POINTER(img, p, pm);
src = from_GB_COLOR(src, img->format);
dst = from_GB_COLOR(dst, img->format);
if (noteq)
{
while (p != pm)
{
if (*p != src)
*p = dst;
p++;
}
}
else
{
while (p != pm)
{
if (*p == src)
*p = dst;
p++;
}
}
}
// Comes from the GIMP
typedef
struct {
float r;
float b;
float g;
float a;
}
FLOAT_RGB;
static void color_to_alpha(FLOAT_RGB *src, const FLOAT_RGB *color)
{
FLOAT_RGB alpha;
alpha.a = src->a;
if (color->r < 0.0001)
alpha.r = src->r;
else if (src->r > color->r)
alpha.r = (src->r - color->r) / (1.0 - color->r);
else if (src->r < color->r)
alpha.r = (color->r - src->r) / color->r;
else alpha.r = 0.0;
if (color->g < 0.0001)
alpha.g = src->g;
else if (src->g > color->g)
alpha.g = (src->g - color->g) / (1.0 - color->g);
else if (src->g < color->g)
alpha.g = (color->g - src->g) / (color->g);
else alpha.g = 0.0;
if (color->b < 0.0001)
alpha.b = src->b;
else if (src->b > color->b)
alpha.b = (src->b - color->b) / (1.0 - color->b);
else if (src->b < color->b)
alpha.b = (color->b - src->b) / (color->b);
else alpha.b = 0.0;
if (alpha.r > alpha.g)
{
if (alpha.r > alpha.b)
{
src->a = alpha.r;
}
else
{
src->a = alpha.b;
}
}
else if (alpha.g > alpha.b)
{
src->a = alpha.g;
}
else
{
src->a = alpha.b;
}
if (src->a < 0.0001)
return;
src->r = (src->r - color->r) / src->a + color->r;
src->g = (src->g - color->g) / src->a + color->g;
src->b = (src->b - color->b) / src->a + color->b;
src->a *= alpha.a;
}
void IMAGE_make_transparent(GB_IMG *img, GB_COLOR col)
{
uint *p = (uint *)img->data;
uint *pm = (uint *)(img->data + IMAGE_size(img));
uint color;
FLOAT_RGB rgb_color;
FLOAT_RGB rgb_src;
//fprintf(stderr, "IMAGE_make_transparent: %d x %d / %d\n", img->width, img->height, img->format);
color = from_GB_COLOR(col, img->format);
rgb_color.b = BLUE(color) / 255.0;
rgb_color.g = GREEN(color) / 255.0;
rgb_color.r = RED(color) / 255.0;
rgb_color.a = 1.0;
while (p != pm)
{
color = BGRA_from_format(*p, img->format);
rgb_src.b = BLUE(color) / 255.0;
rgb_src.g = GREEN(color) / 255.0;
rgb_src.r = RED(color) / 255.0;
rgb_src.a = ALPHA(color) / 255.0;
color_to_alpha(&rgb_src, &rgb_color);
color = RGBA(
(unsigned char)(255.0 * rgb_src.r + 0.5),
(unsigned char)(255.0 * rgb_src.g + 0.5),
(unsigned char)(255.0 * rgb_src.b + 0.5),
(unsigned char)(255.0 * rgb_src.a + 0.5)
);
*p = BGRA_to_format(color, img->format);
//fprintf(stderr, "[%d] %08X\n", p - (uint *)img->data, *p);
p++;
}
//fprintf(stderr, "IMAGE_make_transparent: ** DONE **\n");
}
void IMAGE_set_default_format(int format)
{
_default_format = GB_IMAGE_FMT_CLEAR_PREMULTIPLIED(format);
}
int IMAGE_get_default_format()
{
return _default_format;
}
void IMAGE_bitblt(GB_IMG *dst, int dx, int dy, GB_IMG *src, int sx, int sy, int sw, int sh)
{
if (dst->format != src->format)
return;
// Parameter correction
if ( sw < 0 ) sw = src->width;
if ( sh < 0 ) sh = src->height;
if ( sx < 0 ) { dx -= sx; sw += sx; sx = 0; }
if ( sy < 0 ) { dy -= sy; sh += sy; sy = 0; }
if ( dx < 0 ) { sx -= dx; sw += dx; dx = 0; }
if ( dy < 0 ) { sy -= dy; sh += dy; dy = 0; }
if ( sx + sw > src->width ) sw = src->width - sx;
if ( sy + sh > src->height ) sh = src->height - sy;
if ( dx + sw > dst->width ) sw = dst->width - dx;
if ( dy + sh > dst->height ) sh = dst->height - dy;
if ( sw <= 0 || sh <= 0 ) return; // Nothing left to copy
if (GB_IMAGE_FMT_IS_32_BITS(src->format))
{
uint *d = (uint *)dst->data + dy * dst->width + dx;
uint *s = (uint *)src->data + sy * src->width + sx;
if (sw < 64)
{
// Trust ourselves
const int dd = dst->width - sw;
const int ds = src->width - sw;
int t;
while (sh--)
{
for (t = sw; t--;)
*d++ = *s++;
d += dd;
s += ds;
}
}
else
{
// Trust libc
const int dd = dst->width;
const int ds = src->width;
const int b = sw * sizeof(uint);
while (sh--)
{
memcpy(d, s, b);
d += dd;
s += ds;
}
}
}
else // 24 bits
{
char *d = (char *)dst->data + (dy * dst->width + dx) * 3;
char *s = (char *)src->data + (sy * src->width + sx) * 3;
const int dd = dst->width * 3;
const int ds = src->width * 3;
const int b = sw * 3;
while (sh--)
{
memcpy(d, s, b);
d += dd;
s += ds;
}
}
}
void IMAGE_compose(GB_IMG *dst, int dx, int dy, GB_IMG *src, int sx, int sy, int sw, int sh)
{
if (dst->format != src->format)
return;
// Parameter correction
if ( sw < 0 ) sw = src->width;
if ( sh < 0 ) sh = src->height;
if ( sx < 0 ) { dx -= sx; sw += sx; sx = 0; }
if ( sy < 0 ) { dy -= sy; sh += sy; sy = 0; }
if ( dx < 0 ) { sx -= dx; sw += dx; dx = 0; }
if ( dy < 0 ) { sy -= dy; sh += dy; dy = 0; }
if ( sx + sw > src->width ) sw = src->width - sx;
if ( sy + sh > src->height ) sh = src->height - sy;
if ( dx + sw > dst->width ) sw = dst->width - dx;
if ( dy + sh > dst->height ) sh = dst->height - dy;
if ( sw <= 0 || sh <= 0 ) return;
/*if ( src->hasAlphaBuffer() ) {
QRgb* d = (QRgb*)dst->scanLine(dy) + dx;
QRgb* s = (QRgb*)src->scanLine(sy) + sx;
const int dd = dst->width() - sw;
const int ds = src->width() - sw;
while ( sh-- ) {
for ( int t=sw; t--; ) {
unsigned char a = qAlpha(*s);
if ( a == 255 )
*d++ = *s++;
else if ( a == 0 )
++d,++s; // nothing
else {
unsigned char r = ((qRed(*s)-qRed(*d)) * a) / 256 + qRed(*d);
unsigned char g = ((qGreen(*s)-qGreen(*d)) * a) / 256 + qGreen(*d);
unsigned char b = ((qBlue(*s)-qBlue(*d)) * a) / 256 + qBlue(*d);
a = QMAX(qAlpha(*d),a); // alternatives...
*d++ = qRgba(r,g,b,a);
++s;
}
}
d += dd;
s += ds;
}
} else {*/
switch(src->format)
{
case GB_IMAGE_RGBA: case GB_IMAGE_BGRA:
{
uint *d = (uint *)dst->data + dy * dst->width + dx;
uint *s = (uint *)src->data + sy * src->width + sx;
const int dd = dst->width - sw;
const int ds = src->width - sw;
int t;
while (sh--)
{
for (t = sw; t--;)
{
unsigned char a = ALPHA(*s);
if (a == 255)
*d++ = *s++;
else if (a == 0)
++d,++s; // nothing
else
{
unsigned char r = ((RED(*s)-RED(*d)) * a) / 256 + RED(*d);
unsigned char g = ((GREEN(*s)-GREEN(*d)) * a) / 256 + GREEN(*d);
unsigned char b = ((BLUE(*s)-BLUE(*d)) * a) / 256 + BLUE(*d);
if (ALPHA(*d) > a)
a = ALPHA(*d);
*d++ = RGBA(r,g,b,a);
++s;
}
}
d += dd;
s += ds;
}
break;
}
}
}
void IMAGE_colorize(GB_IMG *img, GB_COLOR color)
{
GET_POINTER(img, p, pm);
uint col;
int h, s, v;
int r, g, b;
int hcol, scol, vcol;
col = from_GB_COLOR(color, img->format);
COLOR_rgb_to_hsv(RED(col), GREEN(col), BLUE(col), &hcol, &scol, &vcol);
while (p != pm)
{
col = BGRA_from_format(*p, img->format);
COLOR_rgb_to_hsv(RED(col), GREEN(col), BLUE(col), &h, &s, &v);
COLOR_hsv_to_rgb(hcol, scol, v, &r, &g, &b);
*p++ = BGRA_to_format(RGBA(r, g, b, ALPHA(col)), img->format);
}
}
void IMAGE_mask(GB_IMG *img, GB_COLOR color)
{
GET_POINTER(img, p, pm);
uint col;
unsigned char red[256], blue[256], green[256], alpha[256];
int i, r, g, b, a;
col = from_GB_COLOR(color, img->format);
r = RED(col);
g = GREEN(col);
b = BLUE(col);
a = ALPHA(col);
for (i = 0; i < 256; i++)
{
red[i] = i * r / 255;
green[i] = i * g / 255;
blue[i] = i * b / 255;
alpha[i] = i * a / 255;
}
while (p != pm)
{
col = BGRA_from_format(*p, img->format);
*p++ = BGRA_to_format(RGBA(red[RED(col)], green[GREEN(col)], blue[BLUE(col)], alpha[ALPHA(col)]), img->format);
}
}
void IMAGE_mirror(GB_IMG *src, GB_IMG *dst, bool horizontal, bool vertical)
{
if (dst->width != src->width || dst->height != src->height || dst->format != src->format)
return;
int w = src->width;
int h = src->height;
int dxi = horizontal ? -1 : 1;
int dxs = horizontal ? (w - 1) : 0;
int dyi = vertical ? -1 : 1;
int dy = vertical ? (h - 1) : 0;
int sx, sy;
if (GB_IMAGE_FMT_IS_24_BITS(src->format))
{
for (sy = 0; sy < h; sy++, dy += dyi)
{
uint24 *ssl = (uint24 *)(src->data + sy * src->width * 3);
uint24 *dsl = (uint24 *)(dst->data + dy * dst->width * 3);
int dx = dxs;
for (sx = 0; sx < w; sx++, dx += dxi)
dsl[dx] = ssl[sx];
}
}
else
{
for (sy = 0; sy < h; sy++, dy += dyi)
{
uint *ssl = (uint *)(src->data + sy * src->width * 4);
uint *dsl = (uint *)(dst->data + dy * dst->width * 4);
int dx = dxs;
for (sx = 0; sx < w; sx++, dx += dxi)
dsl[dx] = ssl[sx];
}
}
}
#if 0
#define GET_RGBA(_col, _r, _g, _b, _a) { _r = RED(_col); _g = GREEN(_col); _b = BLUE(_col); _a = ALPHA(_col); }
void IMAGE_transform(GB_IMG *dst, GB_IMG *src, double sx, double sy, double sdx, double sdy)
{
int x, y;
double ssx;
double ssy;
uint col, cdp;
int ix, iy;
uchar r, g, b, a;
uchar rc, gc, bc, ac;
int wx, wy;
uint *dp = (uint *)dst->data;
memset(dp, 0, IMAGE_size(dst));
dp += dst->width;
for (y = 1; y < (dst->height - 1); y++)
{
ssx = sx;
ssy = sy;
dp++;
for (x = 1; x < (dst->width - 1); x++)
{
ix = sx;
iy = sy;
if (is_valid(src, ix, iy))
{
col = BGRA_from_format(*((uint *)src->data + iy * src->width + ix), src->format);
//dp[1] = RGBA(RED(col) * wx / 256, GREEN(col) * wx / 256, BLUE(col) * wx / 256, ALPHA(col) * wx / 256);
wx = 128;
cdp = BGRA_from_format(*dp, dst->format);
dp[0] = RGBA(RED(cdp) + RED(col) * wx / 256, GREEN(cdp) + GREEN(col) * wx / 256, BLUE(cdp) + BLUE(col) * wx / 256, ALPHA(col));
wx = 32;
cdp = BGRA_from_format(dp[-1], dst->format);
dp[-1] = RGBA(RED(cdp) + RED(col) * wx / 256, GREEN(cdp) + GREEN(col) * wx / 256, BLUE(cdp) + BLUE(col) * wx / 256, ALPHA(col));
cdp = BGRA_from_format(dp[-dst->width], dst->format);
dp[-dst->width] = RGBA(RED(cdp) + RED(col) * wx / 256, GREEN(cdp) + GREEN(col) * wx / 256, BLUE(cdp) + BLUE(col) * wx / 256, ALPHA(col));
dp[1] = RGBA(RED(col) * wx / 256, GREEN(col) * wx / 256, BLUE(col) * wx / 256, 0);
dp[dst->width] = dp[1]; //RGBA(RED(col) * wx / 256, GREEN(col) * wx / 256, BLUE(col) * wx / 256, ALPHA(col) * wx / 256);
}
sx += sdx;
sy += sdy;
dp++;
}
dp++;
sx = ssx - sdy;
sy = ssy + sdx;
}
}
#endif
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