/project/jni/sdl-1.3/src/video/SDL_blit.h
C Header | 495 lines | 418 code | 32 blank | 45 comment | 36 complexity | 64d191cb0c914f22c031c4ca3d22ac1f MD5 | raw file
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 */ 31extern 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 55typedef 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 73typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); 74 75typedef 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 */ 85typedef 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 */ 100extern int SDL_CalculateBlit(SDL_Surface * surface); 101 102/* Functions found in SDL_blit_*.c */ 103extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); 104extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); 105extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); 106extern 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) \ 146do { \ 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) \ 173do { \ 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) \ 321do { \ 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) \ 400do { \ 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: */