SDL  2.0
SDL_rotate.c File Reference
#include "../../SDL_internal.h"
#include <stdlib.h>
#include <string.h>
#include "SDL.h"
#include "SDL_rotate.h"
+ Include dependency graph for SDL_rotate.c:

Go to the source code of this file.

Data Structures

struct  tColorRGBA
 
struct  tColorY
 

Macros

#define MAX(a, b)   (((a) > (b)) ? (a) : (b))
 
#define GUARD_ROWS   (2)
 
#define TRANSFORM_SURFACE_90(pixelType)
 

Functions

static Uint32 _colorkey (SDL_Surface *src)
 
void SDLgfx_rotozoomSurfaceSizeTrig (int width, int height, double angle, int *dstwidth, int *dstheight, double *cangle, double *sangle)
 
static void computeSourceIncrements90 (SDL_Surface *src, int bpp, int angle, int flipx, int flipy, int *sincx, int *sincy, int *signx, int *signy)
 
static void transformSurfaceRGBA90 (SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
 
static void transformSurfaceY90 (SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
 
static void _transformSurfaceRGBA (SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy, int smooth)
 
static void transformSurfaceY (SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy)
 
SDL_SurfaceSDLgfx_rotateSurface (SDL_Surface *src, double angle, int centerx, int centery, int smooth, int flipx, int flipy, int dstwidth, int dstheight, double cangle, double sangle)
 

Macro Definition Documentation

◆ GUARD_ROWS

#define GUARD_ROWS   (2)

Definition at line 77 of file SDL_rotate.c.

◆ MAX

#define MAX (   a,
  b 
)    (((a) > (b)) ? (a) : (b))

Definition at line 65 of file SDL_rotate.c.

◆ TRANSFORM_SURFACE_90

#define TRANSFORM_SURFACE_90 (   pixelType)
Value:
int dy, dincy = dst->pitch - dst->w*sizeof(pixelType), sincx, sincy, signx, signy; \
Uint8 *sp = (Uint8*)src->pixels, *dp = (Uint8*)dst->pixels, *de; \
computeSourceIncrements90(src, sizeof(pixelType), angle, flipx, flipy, &sincx, &sincy, &signx, &signy); \
if (signx < 0) sp += (src->w-1)*sizeof(pixelType); \
if (signy < 0) sp += (src->h-1)*src->pitch; \
\
for (dy = 0; dy < dst->h; sp += sincy, dp += dincy, dy++) { \
if (sincx == sizeof(pixelType)) { /* if advancing src and dest equally, use memcpy */ \
SDL_memcpy(dp, sp, dst->w*sizeof(pixelType)); \
sp += dst->w*sizeof(pixelType); \
dp += dst->w*sizeof(pixelType); \
} else { \
for (de = dp + dst->w*sizeof(pixelType); dp != de; sp += sincx, dp += sizeof(pixelType)) { \
*(pixelType*)dp = *(pixelType*)sp; \
} \
} \
}

Definition at line 176 of file SDL_rotate.c.

Function Documentation

◆ _colorkey()

static Uint32 _colorkey ( SDL_Surface src)
static

Definition at line 83 of file SDL_rotate.c.

84 {
85  Uint32 key = 0;
86  if (SDL_HasColorKey(src)) {
88  }
89  return key;
90 }

References SDL_GetColorKey, and SDL_HasColorKey.

Referenced by transformSurfaceY().

◆ _transformSurfaceRGBA()

static void _transformSurfaceRGBA ( SDL_Surface src,
SDL_Surface dst,
int  cx,
int  cy,
int  isin,
int  icos,
int  flipx,
int  flipy,
int  smooth 
)
static

Definition at line 230 of file SDL_rotate.c.

231 {
232  int x, y, t1, t2, dx, dy, xd, yd, sdx, sdy, ax, ay, ex, ey, sw, sh;
233  tColorRGBA c00, c01, c10, c11, cswap;
234  tColorRGBA *pc, *sp;
235  int gap;
236 
237  /*
238  * Variable setup
239  */
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);
244  sw = src->w - 1;
245  sh = src->h - 1;
246  pc = (tColorRGBA*) dst->pixels;
247  gap = dst->pitch - dst->w * 4;
248 
249  /*
250  * Switch between interpolating and non-interpolating code
251  */
252  if (smooth) {
253  for (y = 0; y < dst->h; y++) {
254  dy = cy - y;
255  sdx = (ax + (isin * dy)) + xd;
256  sdy = (ay - (icos * dy)) + yd;
257  for (x = 0; x < dst->w; x++) {
258  dx = (sdx >> 16);
259  dy = (sdy >> 16);
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))) {
263  sp = (tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy) + dx;
264  c00 = *sp;
265  sp += 1;
266  c01 = *sp;
267  sp += (src->pitch/4);
268  c11 = *sp;
269  sp -= 1;
270  c10 = *sp;
271  if (flipx) {
272  cswap = c00; c00=c01; c01=cswap;
273  cswap = c10; c10=c11; c11=cswap;
274  }
275  if (flipy) {
276  cswap = c00; c00=c10; c10=cswap;
277  cswap = c01; c01=c11; c11=cswap;
278  }
279  /*
280  * Interpolate colors
281  */
282  ex = (sdx & 0xffff);
283  ey = (sdy & 0xffff);
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;
296  }
297  sdx += icos;
298  sdy += isin;
299  pc++;
300  }
301  pc = (tColorRGBA *) ((Uint8 *) pc + gap);
302  }
303  } else {
304  for (y = 0; y < dst->h; y++) {
305  dy = cy - y;
306  sdx = (ax + (isin * dy)) + xd;
307  sdy = (ay - (icos * dy)) + yd;
308  for (x = 0; x < dst->w; x++) {
309  dx = (sdx >> 16);
310  dy = (sdy >> 16);
311  if ((unsigned)dx < (unsigned)src->w && (unsigned)dy < (unsigned)src->h) {
312  if(flipx) dx = sw - dx;
313  if(flipy) dy = sh - dy;
314  *pc = *((tColorRGBA *)((Uint8 *)src->pixels + src->pitch * dy) + dx);
315  }
316  sdx += icos;
317  sdy += isin;
318  pc++;
319  }
320  pc = (tColorRGBA *) ((Uint8 *) pc + gap);
321  }
322  }
323 }

References tColorRGBA::a, tColorRGBA::b, tColorRGBA::g, and tColorRGBA::r.

Referenced by SDLgfx_rotateSurface().

◆ computeSourceIncrements90()

static void computeSourceIncrements90 ( SDL_Surface src,
int  bpp,
int  angle,
int  flipx,
int  flipy,
int *  sincx,
int *  sincy,
int *  signx,
int *  signy 
)
static

Definition at line 154 of file SDL_rotate.c.

156 {
157  int pitch = flipy ? -src->pitch : src->pitch;
158  if (flipx) {
159  bpp = -bpp;
160  }
161  switch (angle) { /* 0:0 deg, 1:90 deg, 2:180 deg, 3:270 deg */
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;
166  }
167  if (flipx) {
168  *signx = -*signx;
169  }
170  if (flipy) {
171  *signy = -*signy;
172  }
173 }

◆ SDLgfx_rotateSurface()

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 
)

Definition at line 415 of file SDL_rotate.c.

416 {
417  SDL_Surface *rz_dst;
418  int is8bit, angle90;
419  int i;
420  SDL_BlendMode blendmode;
421  Uint32 colorkey = 0;
422  int colorKeyAvailable = SDL_FALSE;
423  double sangleinv, cangleinv;
424 
425  /* Sanity check */
426  if (src == NULL)
427  return NULL;
428 
429  if (SDL_HasColorKey(src)) {
430  if (SDL_GetColorKey(src, &colorkey) == 0) {
431  colorKeyAvailable = SDL_TRUE;
432  }
433  }
434 
435  /* This function requires a 32-bit surface or 8-bit surface with a colorkey */
436  is8bit = src->format->BitsPerPixel == 8 && colorKeyAvailable;
437  if (!(is8bit || (src->format->BitsPerPixel == 32 && src->format->Amask)))
438  return NULL;
439 
440  /* Calculate target factors from sin/cos and zoom */
441  sangleinv = sangle*65536.0;
442  cangleinv = cangle*65536.0;
443 
444  /* Alloc space to completely contain the rotated surface */
445  rz_dst = NULL;
446  if (is8bit) {
447  /* Target surface is 8 bit */
448  rz_dst = SDL_CreateRGBSurface(0, dstwidth, dstheight + GUARD_ROWS, 8, 0, 0, 0, 0);
449  if (rz_dst != NULL) {
450  for (i = 0; i < src->format->palette->ncolors; i++) {
451  rz_dst->format->palette->colors[i] = src->format->palette->colors[i];
452  }
453  rz_dst->format->palette->ncolors = src->format->palette->ncolors;
454  }
455  } else {
456  /* Target surface is 32 bit with source RGBA ordering */
457  rz_dst = SDL_CreateRGBSurface(0, dstwidth, dstheight + GUARD_ROWS, 32,
458  src->format->Rmask, src->format->Gmask,
459  src->format->Bmask, src->format->Amask);
460  }
461 
462  /* Check target */
463  if (rz_dst == NULL)
464  return NULL;
465 
466  /* Adjust for guard rows */
467  rz_dst->h = dstheight;
468 
469  SDL_GetSurfaceBlendMode(src, &blendmode);
470 
471  if (colorKeyAvailable == SDL_TRUE) {
472  /* If available, the colorkey will be used to discard the pixels that are outside of the rotated area. */
473  SDL_SetColorKey(rz_dst, SDL_TRUE, colorkey);
474  SDL_FillRect(rz_dst, NULL, colorkey);
475  } else if (blendmode == SDL_BLENDMODE_NONE) {
476  blendmode = SDL_BLENDMODE_BLEND;
477  } else if (blendmode == SDL_BLENDMODE_MOD) {
478  /* Without a colorkey, the target texture has to be white for the MOD blend mode so
479  * that the pixels outside the rotated area don't affect the destination surface.
480  */
481  colorkey = SDL_MapRGBA(rz_dst->format, 255, 255, 255, 0);
482  SDL_FillRect(rz_dst, NULL, colorkey);
483  /* Setting a white colorkey for the destination surface makes the final blit discard
484  * all pixels outside of the rotated area. This doesn't interfere with anything because
485  * white pixels are already a no-op and the MOD blend mode does not interact with alpha.
486  */
487  SDL_SetColorKey(rz_dst, SDL_TRUE, colorkey);
488  }
489 
490  SDL_SetSurfaceBlendMode(rz_dst, blendmode);
491 
492  /* Lock source surface */
493  if (SDL_MUSTLOCK(src)) {
495  }
496 
497  /* check if the rotation is a multiple of 90 degrees so we can take a fast path and also somewhat reduce
498  * the off-by-one problem in _transformSurfaceRGBA that expresses itself when the rotation is near
499  * multiples of 90 degrees.
500  */
501  angle90 = (int)(angle/90);
502  if (angle90 == angle/90) {
503  angle90 %= 4;
504  if (angle90 < 0) angle90 += 4; /* 0:0 deg, 1:90 deg, 2:180 deg, 3:270 deg */
505  } else {
506  angle90 = -1;
507  }
508 
509  if (is8bit) {
510  /* Call the 8-bit transformation routine to do the rotation */
511  if(angle90 >= 0) {
512  transformSurfaceY90(src, rz_dst, angle90, flipx, flipy);
513  } else {
514  transformSurfaceY(src, rz_dst, centerx, centery, (int)sangleinv, (int)cangleinv,
515  flipx, flipy);
516  }
517  } else {
518  /* Call the 32-bit transformation routine to do the rotation */
519  if (angle90 >= 0) {
520  transformSurfaceRGBA90(src, rz_dst, angle90, flipx, flipy);
521  } else {
522  _transformSurfaceRGBA(src, rz_dst, centerx, centery, (int)sangleinv, (int)cangleinv,
523  flipx, flipy, smooth);
524  }
525  }
526 
527  /* Unlock source surface */
528  if (SDL_MUSTLOCK(src)) {
530  }
531 
532  /* Return rotated surface */
533  return rz_dst;
534 }

References _transformSurfaceRGBA(), SDL_Palette::colors, SDL_Surface::format, GUARD_ROWS, SDL_Surface::h, i, SDL_Palette::ncolors, NULL, SDL_PixelFormat::palette, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, SDL_BLENDMODE_NONE, SDL_CreateRGBSurface, SDL_FALSE, SDL_FillRect, SDL_GetColorKey, SDL_GetSurfaceBlendMode, SDL_HasColorKey, SDL_LockSurface, SDL_MapRGBA, SDL_MUSTLOCK, SDL_SetColorKey, SDL_SetSurfaceBlendMode, SDL_TRUE, SDL_UnlockSurface, transformSurfaceRGBA90(), transformSurfaceY(), and transformSurfaceY90().

Referenced by SW_RenderCopyEx().

◆ SDLgfx_rotozoomSurfaceSizeTrig()

void SDLgfx_rotozoomSurfaceSizeTrig ( int  width,
int  height,
double  angle,
int *  dstwidth,
int *  dstheight,
double *  cangle,
double *  sangle 
)

Definition at line 106 of file SDL_rotate.c.

109 {
110  /* The trig code below gets the wrong size (due to FP inaccuracy?) when angle is a multiple of 90 degrees */
111  int angle90 = (int)(angle/90);
112  if(angle90 == angle/90) { /* if the angle is a multiple of 90 degrees */
113  angle90 %= 4;
114  if(angle90 < 0) angle90 += 4; /* 0:0 deg, 1:90 deg, 2:180 deg, 3:270 deg */
115  if(angle90 & 1) {
116  *dstwidth = height;
117  *dstheight = width;
118  *cangle = 0;
119  *sangle = angle90 == 1 ? -1 : 1; /* reversed because our rotations are clockwise */
120  } else {
121  *dstwidth = width;
122  *dstheight = height;
123  *cangle = angle90 == 0 ? 1 : -1;
124  *sangle = 0;
125  }
126  } else {
127  double x, y, cx, cy, sx, sy;
128  double radangle;
129  int dstwidthhalf, dstheighthalf;
130  /*
131  * Determine destination width and height by rotating a centered source box
132  */
133  radangle = angle * (M_PI / -180.0); /* reverse the angle because our rotations are clockwise */
134  *sangle = SDL_sin(radangle);
135  *cangle = SDL_cos(radangle);
136  x = (double)(width / 2);
137  y = (double)(height / 2);
138  cx = *cangle * x;
139  cy = *cangle * y;
140  sx = *sangle * x;
141  sy = *sangle * y;
142 
143  dstwidthhalf = MAX((int)
144  SDL_ceil(MAX(MAX(MAX(SDL_fabs(cx + sy), SDL_fabs(cx - sy)), SDL_fabs(-cx + sy)), SDL_fabs(-cx - sy))), 1);
145  dstheighthalf = MAX((int)
146  SDL_ceil(MAX(MAX(MAX(SDL_fabs(sx + cy), SDL_fabs(sx - cy)), SDL_fabs(-sx + cy)), SDL_fabs(-sx - cy))), 1);
147  *dstwidth = 2 * dstwidthhalf;
148  *dstheight = 2 * dstheighthalf;
149  }
150 }

References MAX, SDL_ceil, SDL_cos, SDL_fabs, and SDL_sin.

Referenced by SW_RenderCopyEx().

◆ transformSurfaceRGBA90()

static void transformSurfaceRGBA90 ( SDL_Surface src,
SDL_Surface dst,
int  angle,
int  flipx,
int  flipy 
)
static

Definition at line 197 of file SDL_rotate.c.

198 {
200 }

References TRANSFORM_SURFACE_90.

Referenced by SDLgfx_rotateSurface().

◆ transformSurfaceY()

static void transformSurfaceY ( SDL_Surface src,
SDL_Surface dst,
int  cx,
int  cy,
int  isin,
int  icos,
int  flipx,
int  flipy 
)
static

Definition at line 344 of file SDL_rotate.c.

345 {
346  int x, y, dx, dy, xd, yd, sdx, sdy, ax, ay;
347  tColorY *pc;
348  int gap;
349 
350  /*
351  * Variable setup
352  */
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);
357  pc = (tColorY*) dst->pixels;
358  gap = dst->pitch - dst->w;
359  /*
360  * Clear surface to colorkey
361  */
362  SDL_memset(pc, (int)(_colorkey(src) & 0xff), dst->pitch * dst->h);
363  /*
364  * Iterate through destination surface
365  */
366  for (y = 0; y < dst->h; y++) {
367  dy = cy - y;
368  sdx = (ax + (isin * dy)) + xd;
369  sdy = (ay - (icos * dy)) + yd;
370  for (x = 0; x < dst->w; x++) {
371  dx = (sdx >> 16);
372  dy = (sdy >> 16);
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;
376  *pc = *((tColorY *)src->pixels + src->pitch * dy + dx);
377  }
378  sdx += icos;
379  sdy += isin;
380  pc++;
381  }
382  pc += gap;
383  }
384 }

References _colorkey(), and SDL_memset.

Referenced by SDLgfx_rotateSurface().

◆ transformSurfaceY90()

static void transformSurfaceY90 ( SDL_Surface src,
SDL_Surface dst,
int  angle,
int  flipx,
int  flipy 
)
static

Definition at line 203 of file SDL_rotate.c.

204 {
206 }

References TRANSFORM_SURFACE_90.

Referenced by SDLgfx_rotateSurface().

SDL_UnlockSurface
#define SDL_UnlockSurface
Definition: SDL_dynapi_overrides.h:449
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:386
tColorRGBA::r
Uint8 r
Definition: SDL_rotate.c:49
t1
GLuint GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat t1
Definition: SDL_opengl_glext.h:8583
SDL_Palette::ncolors
int ncolors
Definition: SDL_pixels.h:306
SDL_MapRGBA
#define SDL_MapRGBA
Definition: SDL_dynapi_overrides.h:287
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:70
SDL_fabs
#define SDL_fabs
Definition: SDL_dynapi_overrides.h:430
SDL_ceil
#define SDL_ceil
Definition: SDL_dynapi_overrides.h:426
NULL
#define NULL
Definition: begin_code.h:167
width
GLint GLint GLsizei width
Definition: SDL_opengl.h:1571
tColorRGBA::a
Uint8 a
Definition: SDL_rotate.c:52
MAX
#define MAX(a, b)
Definition: SDL_rotate.c:65
transformSurfaceRGBA90
static void transformSurfaceRGBA90(SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
Definition: SDL_rotate.c:197
computeSourceIncrements90
static void computeSourceIncrements90(SDL_Surface *src, int bpp, int angle, int flipx, int flipy, int *sincx, int *sincy, int *signx, int *signy)
Definition: SDL_rotate.c:154
tColorRGBA::b
Uint8 b
Definition: SDL_rotate.c:51
SDL_MUSTLOCK
#define SDL_MUSTLOCK(S)
Definition: SDL_surface.h:62
h
GLfloat GLfloat GLfloat GLfloat h
Definition: SDL_opengl_glext.h:1946
SDL_GetSurfaceBlendMode
#define SDL_GetSurfaceBlendMode
Definition: SDL_dynapi_overrides.h:460
SDL_BLENDMODE_MOD
Definition: SDL_blendmode.h:50
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1737
GUARD_ROWS
#define GUARD_ROWS
Definition: SDL_rotate.c:77
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:179
SDL_Palette::colors
SDL_Color * colors
Definition: SDL_pixels.h:307
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1573
height
GLint GLint GLsizei GLsizei height
Definition: SDL_opengl.h:1571
SDL_cos
#define SDL_cos
Definition: SDL_dynapi_overrides.h:428
_transformSurfaceRGBA
static void _transformSurfaceRGBA(SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy, int smooth)
Definition: SDL_rotate.c:230
SDL_FALSE
Definition: SDL_stdinc.h:163
SDL_PixelFormat::palette
SDL_Palette * palette
Definition: SDL_pixels.h:318
SDL_SetColorKey
#define SDL_SetColorKey
Definition: SDL_dynapi_overrides.h:453
SDL_GetColorKey
#define SDL_GetColorKey
Definition: SDL_dynapi_overrides.h:454
key
GLuint64 key
Definition: gl2ext.h:2192
SDL_BLENDMODE_BLEND
Definition: SDL_blendmode.h:44
transformSurfaceY
static void transformSurfaceY(SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy)
Definition: SDL_rotate.c:344
_colorkey
static Uint32 _colorkey(SDL_Surface *src)
Definition: SDL_rotate.c:83
SDL_BlendMode
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
Definition: SDL_blendmode.h:40
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1573
SDL_LockSurface
#define SDL_LockSurface
Definition: SDL_dynapi_overrides.h:448
SDL_CreateRGBSurface
#define SDL_CreateRGBSurface
Definition: SDL_dynapi_overrides.h:444
SDL_Surface::h
int h
Definition: SDL_surface.h:74
transformSurfaceY90
static void transformSurfaceY90(SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
Definition: SDL_rotate.c:203
src
GLenum src
Definition: SDL_opengl_glext.h:1737
TRANSFORM_SURFACE_90
#define TRANSFORM_SURFACE_90(pixelType)
Definition: SDL_rotate.c:176
tColorRGBA
Definition: SDL_rotate.c:48
SDL_TRUE
Definition: SDL_stdinc.h:164
SDL_SetSurfaceBlendMode
#define SDL_SetSurfaceBlendMode
Definition: SDL_dynapi_overrides.h:459
tColorRGBA::g
Uint8 g
Definition: SDL_rotate.c:50
angle
GLfloat angle
Definition: SDL_opengl_glext.h:6097
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDL_FillRect
#define SDL_FillRect
Definition: SDL_dynapi_overrides.h:466
tColorY
Definition: SDL_rotate.c:58
SDL_BLENDMODE_NONE
Definition: SDL_blendmode.h:42
SDL_sin
#define SDL_sin
Definition: SDL_dynapi_overrides.h:435
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:73
i
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)
Definition: SDL_x11sym.h:50
SDL_HasColorKey
#define SDL_HasColorKey
Definition: SDL_dynapi_overrides.h:699
w
GLubyte GLubyte GLubyte GLubyte w
Definition: SDL_opengl_glext.h:731