SDL-1.3/android-project/jni/SDL/src/video/SDL_blit.h

   1 /*
   2   Simple DirectMedia Layer
   3   Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
   4
   5   This software is provided 'as-is', without any express or implied
   6   warranty.  In no event will the authors be held liable for any damages
   7   arising from the use of this software.
   8
   9   Permission is granted to anyone to use this software for any purpose,
  10   including commercial applications, and to alter it and redistribute it
  11   freely, subject to the following restrictions:
  12
  13   1. The origin of this software must not be misrepresented; you must not
  14      claim that you wrote the original software. If you use this software
  15      in a product, an acknowledgment in the product documentation would be
  16      appreciated but is not required.
  17   2. Altered source versions must be plainly marked as such, and must not be
  18      misrepresented as being the original software.
  19   3. This notice may not be removed or altered from any source distribution.
  20 */
  21 #include "SDL_config.h"
  22
  23 #ifndef _SDL_blit_h
  24 #define _SDL_blit_h
  25
  26 #include "SDL_cpuinfo.h"
  27 #include "SDL_endian.h"
  28 #include "SDL_surface.h"
  29
  30 /* Table to do pixel byte expansion */
  31 extern Uint8* SDL_expand_byte[9];
  32
  33 /* SDL blit copy flags */
  34 #define SDL_COPY_MODULATE_COLOR     0x00000001
  35 #define SDL_COPY_MODULATE_ALPHA     0x00000002
  36 #define SDL_COPY_BLEND              0x00000010
  37 #define SDL_COPY_ADD                0x00000020
  38 #define SDL_COPY_MOD                0x00000040
  39 #define SDL_COPY_COLORKEY           0x00000100
  40 #define SDL_COPY_NEAREST            0x00000200
  41 #define SDL_COPY_RLE_DESIRED        0x00001000
  42 #define SDL_COPY_RLE_COLORKEY       0x00002000
  43 #define SDL_COPY_RLE_ALPHAKEY       0x00004000
  44 #define SDL_COPY_RLE_MASK           (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY)
  45
  46 /* SDL blit CPU flags */
  47 #define SDL_CPU_ANY                 0x00000000
  48 #define SDL_CPU_MMX                 0x00000001
  49 #define SDL_CPU_3DNOW               0x00000002
  50 #define SDL_CPU_SSE                 0x00000004
  51 #define SDL_CPU_SSE2                0x00000008
  52 #define SDL_CPU_ALTIVEC_PREFETCH    0x00000010
  53 #define SDL_CPU_ALTIVEC_NOPREFETCH  0x00000020
  54
  55 typedef struct
  56 {
  57     Uint8 *src;
  58     int src_w, src_h;
  59     int src_pitch;
  60     int src_skip;
  61     Uint8 *dst;
  62     int dst_w, dst_h;
  63     int dst_pitch;
  64     int dst_skip;
  65     SDL_PixelFormat *src_fmt;
  66     SDL_PixelFormat *dst_fmt;
  67     Uint8 *table;
  68     int flags;
  69     Uint32 colorkey;
  70     Uint8 r, g, b, a;
  71 } SDL_BlitInfo;
  72
  73 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info);
  74
  75 typedef struct
  76 {
  77     Uint32 src_format;
  78     Uint32 dst_format;
  79     int flags;
  80     int cpu;
  81     SDL_BlitFunc func;
  82 } SDL_BlitFuncEntry;
  83
  84 /* Blit mapping definition */
  85 typedef struct SDL_BlitMap
  86 {
  87     SDL_Surface *dst;
  88     int identity;
  89     SDL_blit blit;
  90     void *data;
  91     SDL_BlitInfo info;
  92
  93     /* the version count matches the destination; mismatch indicates
  94        an invalid mapping */
  95     Uint32 dst_palette_version;
  96     Uint32 src_palette_version;
  97 } SDL_BlitMap;
  98
  99 /* Functions found in SDL_blit.c */
 100 extern int SDL_CalculateBlit(SDL_Surface * surface);
 101
 102 /* Functions found in SDL_blit_*.c */
 103 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
 104 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
 105 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
 106 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
 107
 108 /*
 109  * Useful macros for blitting routines
 110  */
 111
 112 #if defined(__GNUC__)
 113 #define DECLARE_ALIGNED(t,v,a)  t __attribute__((aligned(a))) v
 114 #elif defined(_MSC_VER)
 115 #define DECLARE_ALIGNED(t,v,a)  __declspec(align(a)) t v
 116 #else
 117 #define DECLARE_ALIGNED(t,v,a)  t v
 118 #endif
 119
 120 /* Load pixel of the specified format from a buffer and get its R-G-B values */
 121 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b)                             \
 122 {                                                                       \
 123         r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
 124         g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
 125         b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
 126 }
 127 #define RGB_FROM_RGB565(Pixel, r, g, b)                                 \
 128 {                                                                       \
 129         r = SDL_expand_byte[3][((Pixel&0xF800)>>11)];                                   \
 130         g = SDL_expand_byte[2][((Pixel&0x07E0)>>5)];                                    \
 131         b = SDL_expand_byte[3][(Pixel&0x001F)];                                         \
 132 }
 133 #define RGB_FROM_RGB555(Pixel, r, g, b)                                 \
 134 {                                                                       \
 135         r = SDL_expand_byte[3][((Pixel&0x7C00)>>10)];                                   \
 136         g = SDL_expand_byte[3][((Pixel&0x03E0)>>5)];                                    \
 137         b = SDL_expand_byte[3][(Pixel&0x001F)];                                         \
 138 }
 139 #define RGB_FROM_RGB888(Pixel, r, g, b)                                 \
 140 {                                                                       \
 141         r = ((Pixel&0xFF0000)>>16);                                     \
 142         g = ((Pixel&0xFF00)>>8);                                        \
 143         b = (Pixel&0xFF);                                               \
 144 }
 145 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel)                                \
 146 do {                                                                       \
 147         switch (bpp) {                                                     \
 148                 case 2:                                                    \
 149                         Pixel = *((Uint16 *)(buf));                        \
 150                 break;                                                     \
 151                                                                            \
 152                 case 3: {                                                  \
 153                         Uint8 *B = (Uint8 *)(buf);                         \
 154                         if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {             \
 155                                 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
 156                         } else {                                           \
 157                                 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
 158                         }                                                  \
 159                 }                                                          \
 160                 break;                                                     \
 161                                                                            \
 162                 case 4:                                                    \
 163                         Pixel = *((Uint32 *)(buf));                        \
 164                 break;                                                     \
 165                                                                            \
 166                 default:                                                   \
 167                         Pixel = 0; /* stop gcc complaints */               \
 168                 break;                                                     \
 169         }                                                                  \
 170 } while (0)
 171
 172 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b)                        \
 173 do {                                                                       \
 174         switch (bpp) {                                                     \
 175                 case 2:                                                    \
 176                         Pixel = *((Uint16 *)(buf));                        \
 177                         RGB_FROM_PIXEL(Pixel, fmt, r, g, b);               \
 178                 break;                                                     \
 179                                                                            \
 180                 case 3: {                                                  \
 181             Pixel = 0;                  \
 182                         if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {             \
 183                                 r = *((buf)+fmt->Rshift/8);                \
 184                                 g = *((buf)+fmt->Gshift/8);                \
 185                                 b = *((buf)+fmt->Bshift/8);                \
 186                         } else {                                           \
 187                                 r = *((buf)+2-fmt->Rshift/8);              \
 188                                 g = *((buf)+2-fmt->Gshift/8);              \
 189                                 b = *((buf)+2-fmt->Bshift/8);              \
 190                         }                                                  \
 191                 }                                                          \
 192                 break;                                                     \
 193                                                                            \
 194                 case 4:                                                    \
 195                         Pixel = *((Uint32 *)(buf));                        \
 196                         RGB_FROM_PIXEL(Pixel, fmt, r, g, b);               \
 197                 break;                                                     \
 198                                                                            \
 199                 default:                                                   \
 200                 /* stop gcc complaints */                  \
 201                         Pixel = 0;              \
 202                 r = g = b = 0;          \
 203                 break;                                                     \
 204         }                                                                  \
 205 } while (0)
 206
 207 /* Assemble R-G-B values into a specified pixel format and store them */
 208 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b)                             \
 209 {                                                                       \
 210         Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)|                         \
 211                 ((g>>fmt->Gloss)<<fmt->Gshift)|                         \
 212                 ((b>>fmt->Bloss)<<fmt->Bshift)| \
 213         fmt->Amask;                             \
 214 }
 215 #define RGB565_FROM_RGB(Pixel, r, g, b)                                 \
 216 {                                                                       \
 217         Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3);                        \
 218 }
 219 #define RGB555_FROM_RGB(Pixel, r, g, b)                                 \
 220 {                                                                       \
 221         Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3);                        \
 222 }
 223 #define RGB888_FROM_RGB(Pixel, r, g, b)                                 \
 224 {                                                                       \
 225         Pixel = (r<<16)|(g<<8)|b;                                       \
 226 }
 227 #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a)                           \
 228 {                                                                       \
 229         Pixel = (a<<24)|(r<<16)|(g<<8)|b;                               \
 230 }
 231 #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a)                           \
 232 {                                                                       \
 233         Pixel = (r<<24)|(g<<16)|(b<<8)|a;                               \
 234 }
 235 #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a)                           \
 236 {                                                                       \
 237         Pixel = (a<<24)|(b<<16)|(g<<8)|r;                               \
 238 }
 239 #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a)                           \
 240 {                                                                       \
 241         Pixel = (b<<24)|(g<<16)|(r<<8)|a;                               \
 242 }
 243 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b)                            \
 244 {                                                                       \
 245         switch (bpp) {                                                  \
 246                 case 2: {                                               \
 247                         Uint16 Pixel;                                   \
 248                                                                         \
 249                         PIXEL_FROM_RGB(Pixel, fmt, r, g, b);            \
 250                         *((Uint16 *)(buf)) = Pixel;             \
 251                 }                                                       \
 252                 break;                                                  \
 253                                                                         \
 254                 case 3: {                                               \
 255                         if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {          \
 256                                 *((buf)+fmt->Rshift/8) = r;             \
 257                                 *((buf)+fmt->Gshift/8) = g;             \
 258                                 *((buf)+fmt->Bshift/8) = b;             \
 259                         } else {                                        \
 260                                 *((buf)+2-fmt->Rshift/8) = r;           \
 261                                 *((buf)+2-fmt->Gshift/8) = g;           \
 262                                 *((buf)+2-fmt->Bshift/8) = b;           \
 263                         }                                               \
 264                 }                                                       \
 265                 break;                                                  \
 266                                                                         \
 267                 case 4: {                                               \
 268                         Uint32 Pixel;                                   \
 269                                                                         \
 270                         PIXEL_FROM_RGB(Pixel, fmt, r, g, b);            \
 271                         *((Uint32 *)(buf)) = Pixel;                     \
 272                 }                                                       \
 273                 break;                                                  \
 274         }                                                               \
 275 }
 276
 277 /* FIXME: Should we rescale alpha into 0..255 here? */
 278 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a)                         \
 279 {                                                                       \
 280         r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
 281         g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
 282         b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
 283         a = SDL_expand_byte[fmt->Aloss][((Pixel&fmt->Amask)>>fmt->Ashift)]; \
 284 }
 285 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a)  \
 286 {                                               \
 287         r = (Pixel&fmt->Rmask)>>fmt->Rshift;    \
 288         g = (Pixel&fmt->Gmask)>>fmt->Gshift;    \
 289         b = (Pixel&fmt->Bmask)>>fmt->Bshift;    \
 290         a = (Pixel&fmt->Amask)>>fmt->Ashift;    \
 291 }
 292 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a)                           \
 293 {                                                                       \
 294         r = (Pixel>>24);                                                \
 295         g = ((Pixel>>16)&0xFF);                                         \
 296         b = ((Pixel>>8)&0xFF);                                          \
 297         a = (Pixel&0xFF);                                               \
 298 }
 299 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a)                           \
 300 {                                                                       \
 301         r = ((Pixel>>16)&0xFF);                                         \
 302         g = ((Pixel>>8)&0xFF);                                          \
 303         b = (Pixel&0xFF);                                               \
 304         a = (Pixel>>24);                                                \
 305 }
 306 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a)                           \
 307 {                                                                       \
 308         r = (Pixel&0xFF);                                               \
 309         g = ((Pixel>>8)&0xFF);                                          \
 310         b = ((Pixel>>16)&0xFF);                                         \
 311         a = (Pixel>>24);                                                \
 312 }
 313 #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a)                           \
 314 {                                                                       \
 315         r = ((Pixel>>8)&0xFF);                                          \
 316         g = ((Pixel>>16)&0xFF);                                         \
 317         b = (Pixel>>24);                                                \
 318         a = (Pixel&0xFF);                                               \
 319 }
 320 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a)                    \
 321 do {                                                                       \
 322         switch (bpp) {                                                     \
 323                 case 2:                                                    \
 324                         Pixel = *((Uint16 *)(buf));                        \
 325                         RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a);           \
 326                 break;                                                     \
 327                                                                            \
 328                 case 3: {                                                  \
 329             Pixel = 0; \
 330                         if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {             \
 331                                 r = *((buf)+fmt->Rshift/8);                \
 332                                 g = *((buf)+fmt->Gshift/8);                \
 333                                 b = *((buf)+fmt->Bshift/8);                \
 334                         } else {                                           \
 335                                 r = *((buf)+2-fmt->Rshift/8);              \
 336                                 g = *((buf)+2-fmt->Gshift/8);              \
 337                                 b = *((buf)+2-fmt->Bshift/8);              \
 338                         }                                                  \
 339                         a = 0xFF;                                          \
 340                 }                                                          \
 341                 break;                                                     \
 342                                                                            \
 343                 case 4:                                                    \
 344                         Pixel = *((Uint32 *)(buf));                        \
 345                         RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a);           \
 346                 break;                                                     \
 347                                                                            \
 348                 default:                                                   \
 349                 /* stop gcc complaints */                  \
 350                         Pixel = 0;              \
 351                 r = g = b = a = 0;      \
 352                 break;                                                     \
 353         }                                                                  \
 354 } while (0)
 355
 356 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
 357 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a)                         \
 358 {                                                                       \
 359         Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)|                         \
 360                 ((g>>fmt->Gloss)<<fmt->Gshift)|                         \
 361                 ((b>>fmt->Bloss)<<fmt->Bshift)|                         \
 362                 ((a>>fmt->Aloss)<<fmt->Ashift);                         \
 363 }
 364 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a)                        \
 365 {                                                                       \
 366         switch (bpp) {                                                  \
 367                 case 2: {                                               \
 368                         Uint16 Pixel;                                   \
 369                                                                         \
 370                         PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a);        \
 371                         *((Uint16 *)(buf)) = Pixel;             \
 372                 }                                                       \
 373                 break;                                                  \
 374                                                                         \
 375                 case 3: {                                               \
 376                         if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {          \
 377                                 *((buf)+fmt->Rshift/8) = r;             \
 378                                 *((buf)+fmt->Gshift/8) = g;             \
 379                                 *((buf)+fmt->Bshift/8) = b;             \
 380                         } else {                                        \
 381                                 *((buf)+2-fmt->Rshift/8) = r;           \
 382                                 *((buf)+2-fmt->Gshift/8) = g;           \
 383                                 *((buf)+2-fmt->Bshift/8) = b;           \
 384                         }                                               \
 385                 }                                                       \
 386                 break;                                                  \
 387                                                                         \
 388                 case 4: {                                               \
 389                         Uint32 Pixel;                                   \
 390                                                                         \
 391                         PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a);        \
 392                         *((Uint32 *)(buf)) = Pixel;                     \
 393                 }                                                       \
 394                 break;                                                  \
 395         }                                                               \
 396 }
 397
 398 /* Blend the RGB values of two Pixels based on a source alpha value */
 399 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB)  \
 400 do {                                            \
 401         dR = ((((int)(sR-dR)*(int)A)/255)+dR);  \
 402         dG = ((((int)(sG-dG)*(int)A)/255)+dG);  \
 403         dB = ((((int)(sB-dB)*(int)A)/255)+dB);  \
 404 } while(0)
 405
 406
 407 /* This is a very useful loop for optimizing blitters */
 408 #if defined(_MSC_VER) && (_MSC_VER == 1300)
 409 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */
 410 #else
 411 #define USE_DUFFS_LOOP
 412 #endif
 413 #ifdef USE_DUFFS_LOOP
 414
 415 /* 8-times unrolled loop */
 416 #define DUFFS_LOOP8(pixel_copy_increment, width)                        \
 417 { int n = (width+7)/8;                                                  \
 418         switch (width & 7) {                                            \
 419         case 0: do {    pixel_copy_increment;                           \
 420         case 7:         pixel_copy_increment;                           \
 421         case 6:         pixel_copy_increment;                           \
 422         case 5:         pixel_copy_increment;                           \
 423         case 4:         pixel_copy_increment;                           \
 424         case 3:         pixel_copy_increment;                           \
 425         case 2:         pixel_copy_increment;                           \
 426         case 1:         pixel_copy_increment;                           \
 427                 } while ( --n > 0 );                                    \
 428         }                                                               \
 429 }
 430
 431 /* 4-times unrolled loop */
 432 #define DUFFS_LOOP4(pixel_copy_increment, width)                        \
 433 { int n = (width+3)/4;                                                  \
 434         switch (width & 3) {                                            \
 435         case 0: do {    pixel_copy_increment;                           \
 436         case 3:         pixel_copy_increment;                           \
 437         case 2:         pixel_copy_increment;                           \
 438         case 1:         pixel_copy_increment;                           \
 439                 } while (--n > 0);                                      \
 440         }                                                               \
 441 }
 442
 443 /* Use the 8-times version of the loop by default */
 444 #define DUFFS_LOOP(pixel_copy_increment, width)                         \
 445         DUFFS_LOOP8(pixel_copy_increment, width)
 446
 447 /* Special version of Duff's device for even more optimization */
 448 #define DUFFS_LOOP_124(pixel_copy_increment1,                           \
 449                        pixel_copy_increment2,                           \
 450                        pixel_copy_increment4, width)                    \
 451 { int n = width;                                                        \
 452         if (n & 1) {                                                    \
 453                 pixel_copy_increment1; n -= 1;                          \
 454         }                                                               \
 455         if (n & 2) {                                                    \
 456                 pixel_copy_increment2; n -= 2;                          \
 457         }                                                               \
 458         if (n) {                                                        \
 459                 n = (n+7)/ 8;                                           \
 460                 switch (n & 4) {                                        \
 461                 case 0: do {    pixel_copy_increment4;                  \
 462                 case 4:         pixel_copy_increment4;                  \
 463                         } while (--n > 0);                              \
 464                 }                                                       \
 465         }                                                               \
 466 }
 467
 468 #else
 469
 470 /* Don't use Duff's device to unroll loops */
 471 #define DUFFS_LOOP(pixel_copy_increment, width)                         \
 472 { int n;                                                                \
 473         for ( n=width; n > 0; --n ) {                                   \
 474                 pixel_copy_increment;                                   \
 475         }                                                               \
 476 }
 477 #define DUFFS_LOOP8(pixel_copy_increment, width)                        \
 478         DUFFS_LOOP(pixel_copy_increment, width)
 479 #define DUFFS_LOOP4(pixel_copy_increment, width)                        \
 480         DUFFS_LOOP(pixel_copy_increment, width)
 481 #define DUFFS_LOOP_124(pixel_copy_increment1,                           \
 482                        pixel_copy_increment2,                           \
 483                        pixel_copy_increment4, width)                    \
 484         DUFFS_LOOP(pixel_copy_increment1, width)
 485
 486 #endif /* USE_DUFFS_LOOP */
 487
 488 /* Prevent Visual C++ 6.0 from printing out stupid warnings */
 489 #if defined(_MSC_VER) && (_MSC_VER >= 600)
 490 #pragma warning(disable: 4550)
 491 #endif
 492
 493 #endif /* _SDL_blit_h */
 494
 495 /* vi: set ts=4 sw=4 expandtab: */