31 #include "../../SDL_internal.h"
33 #if defined(__WIN32__)
34 #include "../../core/windows/SDL_windows.h"
65 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
77 #define GUARD_ROWS (2)
107 int *dstwidth,
int *dstheight,
108 double *cangle,
double *sangle)
111 int angle90 = (int)(
angle/90);
112 if(angle90 ==
angle/90) {
114 if(angle90 < 0) angle90 += 4;
119 *sangle = angle90 == 1 ? -1 : 1;
123 *cangle = angle90 == 0 ? 1 : -1;
127 double x,
y, cx, cy, sx, sy;
129 int dstwidthhalf, dstheighthalf;
133 radangle =
angle * (M_PI / -180.0);
143 dstwidthhalf =
MAX((
int)
145 dstheighthalf =
MAX((
int)
147 *dstwidth = 2 * dstwidthhalf;
148 *dstheight = 2 * dstheighthalf;
155 int *sincx,
int *sincy,
int *signx,
int *signy)
157 int pitch = flipy ? -
src->pitch :
src->pitch;
162 case 0: *sincx = bpp; *sincy = pitch -
src->w * *sincx; *signx = *signy = 1;
break;
163 case 1: *sincx = -pitch; *sincy = bpp - *sincx *
src->h; *signx = 1; *signy = -1;
break;
164 case 2: *sincx = -bpp; *sincy = -
src->w * *sincx - pitch; *signx = *signy = -1;
break;
165 case 3:
default: *sincx = pitch; *sincy = -*sincx *
src->h - bpp; *signx = -1; *signy = 1;
break;
176 #define TRANSFORM_SURFACE_90(pixelType) \
177 int dy, dincy = dst->pitch - dst->w*sizeof(pixelType), sincx, sincy, signx, signy; \
178 Uint8 *sp = (Uint8*)src->pixels, *dp = (Uint8*)dst->pixels, *de; \
180 computeSourceIncrements90(src, sizeof(pixelType), angle, flipx, flipy, &sincx, &sincy, &signx, &signy); \
181 if (signx < 0) sp += (src->w-1)*sizeof(pixelType); \
182 if (signy < 0) sp += (src->h-1)*src->pitch; \
184 for (dy = 0; dy < dst->h; sp += sincy, dp += dincy, dy++) { \
185 if (sincx == sizeof(pixelType)) { \
186 SDL_memcpy(dp, sp, dst->w*sizeof(pixelType)); \
187 sp += dst->w*sizeof(pixelType); \
188 dp += dst->w*sizeof(pixelType); \
190 for (de = dp + dst->w*sizeof(pixelType); dp != de; sp += sincx, dp += sizeof(pixelType)) { \
191 *(pixelType*)dp = *(pixelType*)sp; \
208 #undef TRANSFORM_SURFACE_90
232 int x,
y,
t1, t2, dx, dy, xd, yd, sdx, sdy, ax, ay, ex, ey, sw, sh;
240 xd = ((
src->w -
dst->w) << 15);
241 yd = ((
src->h -
dst->h) << 15);
242 ax = (cx << 16) - (icos * cx);
243 ay = (cy << 16) - (isin * cx);
247 gap =
dst->pitch -
dst->w * 4;
253 for (
y = 0;
y <
dst->h;
y++) {
255 sdx = (ax + (isin * dy)) + xd;
256 sdy = (ay - (icos * dy)) + yd;
257 for (
x = 0;
x <
dst->w;
x++) {
260 if (flipx) dx = sw - dx;
261 if (flipy) dy = sh - dy;
262 if ((dx > -1) && (dy > -1) && (dx < (
src->w-1)) && (dy < (
src->h-1))) {
267 sp += (
src->pitch/4);
272 cswap = c00; c00=c01; c01=cswap;
273 cswap = c10; c10=c11; c11=cswap;
276 cswap = c00; c00=c10; c10=cswap;
277 cswap = c01; c01=c11; c11=cswap;
284 t1 = ((((c01.
r - c00.
r) * ex) >> 16) + c00.
r) & 0xff;
285 t2 = ((((c11.
r - c10.
r) * ex) >> 16) + c10.
r) & 0xff;
286 pc->
r = (((t2 -
t1) * ey) >> 16) +
t1;
287 t1 = ((((c01.
g - c00.
g) * ex) >> 16) + c00.
g) & 0xff;
288 t2 = ((((c11.
g - c10.
g) * ex) >> 16) + c10.
g) & 0xff;
289 pc->
g = (((t2 -
t1) * ey) >> 16) +
t1;
290 t1 = ((((c01.
b - c00.
b) * ex) >> 16) + c00.
b) & 0xff;
291 t2 = ((((c11.
b - c10.
b) * ex) >> 16) + c10.
b) & 0xff;
292 pc->
b = (((t2 -
t1) * ey) >> 16) +
t1;
293 t1 = ((((c01.
a - c00.
a) * ex) >> 16) + c00.
a) & 0xff;
294 t2 = ((((c11.
a - c10.
a) * ex) >> 16) + c10.
a) & 0xff;
295 pc->
a = (((t2 -
t1) * ey) >> 16) +
t1;
304 for (
y = 0;
y <
dst->h;
y++) {
306 sdx = (ax + (isin * dy)) + xd;
307 sdy = (ay - (icos * dy)) + yd;
308 for (
x = 0;
x <
dst->w;
x++) {
311 if ((
unsigned)dx < (unsigned)
src->w && (
unsigned)dy < (unsigned)
src->h) {
312 if(flipx) dx = sw - dx;
313 if(flipy) dy = sh - dy;
346 int x,
y, dx, dy, xd, yd, sdx, sdy, ax, ay;
353 xd = ((
src->w -
dst->w) << 15);
354 yd = ((
src->h -
dst->h) << 15);
355 ax = (cx << 16) - (icos * cx);
356 ay = (cy << 16) - (isin * cx);
358 gap =
dst->pitch -
dst->w;
366 for (
y = 0;
y <
dst->h;
y++) {
368 sdx = (ax + (isin * dy)) + xd;
369 sdy = (ay - (icos * dy)) + yd;
370 for (
x = 0;
x <
dst->w;
x++) {
373 if ((
unsigned)dx < (unsigned)
src->w && (
unsigned)dy < (unsigned)
src->h) {
374 if (flipx) dx = (
src->w-1)-dx;
375 if (flipy) dy = (
src->h-1)-dy;
415 SDLgfx_rotateSurface(
SDL_Surface *
src,
double angle,
int centerx,
int centery,
int smooth,
int flipx,
int flipy,
int dstwidth,
int dstheight,
double cangle,
double sangle)
423 double sangleinv, cangleinv;
436 is8bit =
src->format->BitsPerPixel == 8 && colorKeyAvailable;
437 if (!(is8bit || (
src->format->BitsPerPixel == 32 &&
src->format->Amask)))
441 sangleinv = sangle*65536.0;
442 cangleinv = cangle*65536.0;
449 if (rz_dst !=
NULL) {
450 for (
i = 0;
i <
src->format->palette->ncolors;
i++) {
458 src->format->Rmask,
src->format->Gmask,
459 src->format->Bmask,
src->format->Amask);
467 rz_dst->
h = dstheight;
471 if (colorKeyAvailable ==
SDL_TRUE) {
501 angle90 = (int)(
angle/90);
502 if (angle90 ==
angle/90) {
504 if (angle90 < 0) angle90 += 4;
523 flipx, flipy, smooth);