#include "../../SDL_internal.h"
#include <stdlib.h>
#include <string.h>
#include "SDL.h"
#include "SDL_rotate.h"
Go to the source code of this file.
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static Uint32 | _colorkey (SDL_Surface *src) |
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void | SDLgfx_rotozoomSurfaceSizeTrig (int width, int height, double angle, int *dstwidth, int *dstheight, double *cangle, double *sangle) |
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static void | computeSourceIncrements90 (SDL_Surface *src, int bpp, int angle, int flipx, int flipy, int *sincx, int *sincy, int *signx, int *signy) |
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static void | transformSurfaceRGBA90 (SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy) |
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static void | transformSurfaceY90 (SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy) |
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static void | _transformSurfaceRGBA (SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy, int smooth) |
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static void | transformSurfaceY (SDL_Surface *src, SDL_Surface *dst, int cx, int cy, int isin, int icos, int flipx, int flipy) |
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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) |
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◆ GUARD_ROWS
◆ MAX
#define MAX |
( |
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a, |
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b |
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) |
| (((a) > (b)) ? (a) : (b)) |
◆ TRANSFORM_SURFACE_90
#define TRANSFORM_SURFACE_90 |
( |
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pixelType | ) |
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Value: int dy, dincy =
dst->pitch -
dst->w*
sizeof(pixelType), 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)) { \
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 179 of file SDL_rotate.c.
◆ _colorkey()
◆ _transformSurfaceRGBA()
static void _transformSurfaceRGBA |
( |
SDL_Surface * |
src, |
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SDL_Surface * |
dst, |
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int |
cx, |
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int |
cy, |
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int |
isin, |
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int |
icos, |
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int |
flipx, |
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int |
flipy, |
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int |
smooth |
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) |
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static |
Definition at line 232 of file SDL_rotate.c.
234 int x,
y,
t1, t2, dx, dy, xd, yd, sdx, sdy, ax, ay, ex, ey, sw, sh;
242 xd = ((
src->w -
dst->w) << 15);
243 yd = ((
src->h -
dst->h) << 15);
244 ax = (cx << 16) - (icos * cx);
245 ay = (cy << 16) - (isin * cx);
249 gap =
dst->pitch -
dst->w * 4;
255 for (
y = 0;
y <
dst->h;
y++) {
257 sdx = (ax + (isin * dy)) + xd;
258 sdy = (ay - (icos * dy)) + yd;
259 for (
x = 0;
x <
dst->w;
x++) {
262 if (flipx) dx = sw - dx;
263 if (flipy) dy = sh - dy;
264 if ((dx > -1) && (dy > -1) && (dx < (
src->w-1)) && (dy < (
src->h-1))) {
269 sp += (
src->pitch/4);
274 cswap = c00; c00=c01; c01=cswap;
275 cswap = c10; c10=c11; c11=cswap;
278 cswap = c00; c00=c10; c10=cswap;
279 cswap = c01; c01=c11; c11=cswap;
286 t1 = ((((c01.
r - c00.
r) * ex) >> 16) + c00.
r) & 0xff;
287 t2 = ((((c11.
r - c10.
r) * ex) >> 16) + c10.
r) & 0xff;
288 pc->
r = (((t2 -
t1) * ey) >> 16) +
t1;
289 t1 = ((((c01.
g - c00.
g) * ex) >> 16) + c00.
g) & 0xff;
290 t2 = ((((c11.
g - c10.
g) * ex) >> 16) + c10.
g) & 0xff;
291 pc->
g = (((t2 -
t1) * ey) >> 16) +
t1;
292 t1 = ((((c01.
b - c00.
b) * ex) >> 16) + c00.
b) & 0xff;
293 t2 = ((((c11.
b - c10.
b) * ex) >> 16) + c10.
b) & 0xff;
294 pc->
b = (((t2 -
t1) * ey) >> 16) +
t1;
295 t1 = ((((c01.
a - c00.
a) * ex) >> 16) + c00.
a) & 0xff;
296 t2 = ((((c11.
a - c10.
a) * ex) >> 16) + c10.
a) & 0xff;
297 pc->
a = (((t2 -
t1) * ey) >> 16) +
t1;
306 for (
y = 0;
y <
dst->h;
y++) {
308 sdx = (ax + (isin * dy)) + xd;
309 sdy = (ay - (icos * dy)) + yd;
310 for (
x = 0;
x <
dst->w;
x++) {
313 if ((
unsigned)dx < (unsigned)
src->w && (
unsigned)dy < (unsigned)
src->h) {
314 if(flipx) dx = sw - dx;
315 if(flipy) dy = sh - dy;
References tColorRGBA::a, tColorRGBA::b, tColorRGBA::g, if, and tColorRGBA::r.
Referenced by SDLgfx_rotateSurface().
◆ computeSourceIncrements90()
static void computeSourceIncrements90 |
( |
SDL_Surface * |
src, |
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int |
bpp, |
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int |
angle, |
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int |
flipx, |
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int |
flipy, |
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int * |
sincx, |
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int * |
sincy, |
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int * |
signx, |
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int * |
signy |
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) |
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static |
Definition at line 156 of file SDL_rotate.c.
159 int pitch = flipy ? -
src->pitch :
src->pitch;
164 case 0: *sincx =
bpp; *sincy = pitch -
src->w * *sincx; *signx = *signy = 1;
break;
165 case 1: *sincx = -pitch; *sincy =
bpp - *sincx *
src->h; *signx = 1; *signy = -1;
break;
166 case 2: *sincx = -
bpp; *sincy = -
src->w * *sincx - pitch; *signx = *signy = -1;
break;
167 case 3:
default: *sincx = pitch; *sincy = -*sincx *
src->h -
bpp; *signx = -1; *signy = 1;
break;
References bpp.
◆ SDLgfx_rotateSurface()
SDL_Surface* SDLgfx_rotateSurface |
( |
SDL_Surface * |
src, |
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double |
angle, |
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int |
centerx, |
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int |
centery, |
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int |
smooth, |
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int |
flipx, |
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int |
flipy, |
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int |
dstwidth, |
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int |
dstheight, |
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double |
cangle, |
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double |
sangle |
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) |
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Definition at line 417 of file SDL_rotate.c.
425 double sangleinv, cangleinv;
438 is8bit =
src->format->BitsPerPixel == 8 && colorKeyAvailable;
439 if (!(is8bit || (
src->format->BitsPerPixel == 32 &&
src->format->Amask)))
443 sangleinv = sangle*65536.0;
444 cangleinv = cangle*65536.0;
451 if (rz_dst !=
NULL) {
452 for (
i = 0;
i <
src->format->palette->ncolors;
i++) {
460 src->format->Rmask,
src->format->Gmask,
461 src->format->Bmask,
src->format->Amask);
469 rz_dst->
h = dstheight;
473 if (colorKeyAvailable ==
SDL_TRUE) {
503 angle90 = (int)(
angle/90);
504 if (angle90 ==
angle/90) {
506 if (angle90 < 0) angle90 += 4;
525 flipx, flipy, smooth);
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_MUL, 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 |
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int |
width, |
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int |
height, |
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double |
angle, |
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int * |
dstwidth, |
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int * |
dstheight, |
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double * |
cangle, |
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double * |
sangle |
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) |
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Definition at line 108 of file SDL_rotate.c.
113 int angle90 = (int)(
angle/90);
114 if(angle90 ==
angle/90) {
116 if(angle90 < 0) angle90 += 4;
121 *sangle = angle90 == 1 ? -1 : 1;
125 *cangle = angle90 == 0 ? 1 : -1;
129 double x,
y, cx, cy, sx, sy;
131 int dstwidthhalf, dstheighthalf;
135 radangle =
angle * (M_PI / -180.0);
145 dstwidthhalf =
MAX((
int)
147 dstheighthalf =
MAX((
int)
149 *dstwidth = 2 * dstwidthhalf;
150 *dstheight = 2 * dstheighthalf;
References MAX, SDL_ceil, SDL_cos, SDL_fabs, and SDL_sin.
Referenced by SW_RenderCopyEx().
◆ transformSurfaceRGBA90()
◆ transformSurfaceY()
Definition at line 346 of file SDL_rotate.c.
348 int x,
y, dx, dy, xd, yd, sdx, sdy, ax, ay;
355 xd = ((
src->w -
dst->w) << 15);
356 yd = ((
src->h -
dst->h) << 15);
357 ax = (cx << 16) - (icos * cx);
358 ay = (cy << 16) - (isin * cx);
360 gap =
dst->pitch -
dst->w;
368 for (
y = 0;
y <
dst->h;
y++) {
370 sdx = (ax + (isin * dy)) + xd;
371 sdy = (ay - (icos * dy)) + yd;
372 for (
x = 0;
x <
dst->w;
x++) {
375 if ((
unsigned)dx < (unsigned)
src->w && (
unsigned)dy < (unsigned)
src->h) {
376 if (flipx) dx = (
src->w-1)-dx;
377 if (flipy) dy = (
src->h-1)-dy;
References _colorkey(), and SDL_memset.
Referenced by SDLgfx_rotateSurface().
◆ transformSurfaceY90()
#define SDL_UnlockSurface
GLuint GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat GLfloat t1
A collection of pixels used in software blitting.
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp *numpix else pixst endif endm macro pixld1_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl else error unsupported endif endm macro pixld2_s mem_operand if mov asr add asl add asl mov asr sub UNIT_X add asl mov asr add asl add asl mov asr add UNIT_X add asl else pixld1_s mem_operand pixld1_s mem_operand endif endm macro pixld0_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl endif endm macro pixld_s_internal mem_operand if mem_operand pixld2_s mem_operand pixdeinterleave basereg elseif mem_operand elseif mem_operand elseif mem_operand elseif mem_operand pixld0_s mem_operand else pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else error unsupported mem_operand if bpp mem_operand endif endm macro vuzp8 reg2 vuzp d d ®2 endm macro vzip8 reg2 vzip d d ®2 endm macro pixdeinterleave basereg basereg basereg basereg basereg endif endm macro pixinterleave basereg basereg basereg basereg basereg endif endm macro PF boost_increment endif if endif PF tst PF addne PF subne PF cmp ORIG_W if endif if endif if endif PF subge ORIG_W PF subges if endif if endif if endif endif endm macro cache_preload_simple endif if dst_r_bpp pld[DST_R, #(PREFETCH_DISTANCE_SIMPLE *dst_r_bpp/8)] endif if mask_bpp pld if[MASK, #(PREFETCH_DISTANCE_SIMPLE *mask_bpp/8)] endif endif endm macro fetch_mask_pixblock pixld mask_basereg pixblock_size MASK endm macro ensure_destination_ptr_alignment process_pixblock_tail_head if beq irp skip1(dst_w_bpp<=(lowbit *8)) &&((lowbit *8)<(pixblock_size *dst_w_bpp)) .if lowbit< 16 tst DST_R
GLint GLint GLsizei width
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)
GLfloat GLfloat GLfloat GLfloat h
#define SDL_GetSurfaceBlendMode
GLint GLint GLint GLint GLint x
GLint GLint GLsizei GLsizei height
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)
static Uint32 _colorkey(SDL_Surface *src)
GLint GLint GLint GLint GLint GLint y
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp
#define SDL_CreateRGBSurface
static void transformSurfaceY90(SDL_Surface *src, SDL_Surface *dst, int angle, int flipx, int flipy)
#define TRANSFORM_SURFACE_90(pixelType)
#define SDL_SetSurfaceBlendMode
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)
SDL_BlendMode
The blend mode used in SDL_RenderCopy() and drawing operations.
GLubyte GLubyte GLubyte GLubyte w