31#include "../../SDL_internal.h"
34#include "../../core/windows/SDL_windows.h"
65#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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;
415SDLgfx_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);
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
#define SDL_GetSurfaceBlendMode
#define SDL_SetSurfaceBlendMode
#define SDL_UnlockSurface
#define SDL_CreateRGBSurface
GLint GLint GLint GLint GLint GLint y
GLint GLint GLsizei width
GLint GLint GLint GLint GLint x
GLint GLint GLsizei GLsizei height
GLuint GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat t1
static void _transformSurfaceRGBA(SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy, int smooth)
static Uint32 _colorkey(SDL_Surface *src)
static void transformSurfaceY90(SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
void SDLgfx_rotozoomSurfaceSizeTrig(int width, int height, double angle, int *dstwidth, int *dstheight, double *cangle, double *sangle)
static void transformSurfaceRGBA90(SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
static void computeSourceIncrements90(SDL_Surface *src, int bpp, int angle, int flipx, int flipy, int *sincx, int *sincy, int *signx, int *signy)
static void transformSurfaceY(SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy)
#define TRANSFORM_SURFACE_90(pixelType)
SDL_Surface * 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)
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
A collection of pixels used in software blitting.