1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_GGL_CONTEXT_H 18 #define ANDROID_GGL_CONTEXT_H 19 20 #include <stdint.h> 21 #include <stddef.h> 22 #include <string.h> 23 #include <sys/types.h> 24 #include <endian.h> 25 26 #include <pixelflinger/pixelflinger.h> 27 #include <private/pixelflinger/ggl_fixed.h> 28 29 namespace android { 30 31 // ---------------------------------------------------------------------------- 32 33 #if BYTE_ORDER == LITTLE_ENDIAN 34 35 inline uint32_t GGL_RGBA_TO_HOST(uint32_t v) { 36 return v; 37 } 38 inline uint32_t GGL_HOST_TO_RGBA(uint32_t v) { 39 return v; 40 } 41 42 #else 43 44 inline uint32_t GGL_RGBA_TO_HOST(uint32_t v) { 45 #if defined(__mips__) && __mips==32 && __mips_isa_rev>=2 46 uint32_t r; 47 __asm__("wsbh %0, %1;" 48 "rotr %0, %0, 16" 49 : "=r" (r) 50 : "r" (v) 51 ); 52 return r; 53 #else 54 return (v<<24) | (v>>24) | ((v<<8)&0xff0000) | ((v>>8)&0xff00); 55 #endif 56 } 57 inline uint32_t GGL_HOST_TO_RGBA(uint32_t v) { 58 #if defined(__mips__) && __mips==32 && __mips_isa_rev>=2 59 uint32_t r; 60 __asm__("wsbh %0, %1;" 61 "rotr %0, %0, 16" 62 : "=r" (r) 63 : "r" (v) 64 ); 65 return r; 66 #else 67 return (v<<24) | (v>>24) | ((v<<8)&0xff0000) | ((v>>8)&0xff00); 68 #endif 69 } 70 71 #endif 72 73 // ---------------------------------------------------------------------------- 74 75 const int GGL_DITHER_BITS = 6; // dither weights stored on 6 bits 76 const int GGL_DITHER_ORDER_SHIFT= 3; 77 const int GGL_DITHER_ORDER = (1<<GGL_DITHER_ORDER_SHIFT); 78 const int GGL_DITHER_SIZE = GGL_DITHER_ORDER * GGL_DITHER_ORDER; 79 const int GGL_DITHER_MASK = GGL_DITHER_ORDER-1; 80 81 // ---------------------------------------------------------------------------- 82 83 const int GGL_SUBPIXEL_BITS = 4; 84 85 // TRI_FRACTION_BITS defines the number of bits we want to use 86 // for the sub-pixel coordinates during the edge stepping, the 87 // value shouldn't be more than 7, or bad things are going to 88 // happen when drawing large triangles (8 doesn't work because 89 // 32 bit muls will loose the sign bit) 90 91 #define TRI_FRACTION_BITS (GGL_SUBPIXEL_BITS) 92 #define TRI_ONE (1 << TRI_FRACTION_BITS) 93 #define TRI_HALF (1 << (TRI_FRACTION_BITS-1)) 94 #define TRI_FROM_INT(x) ((x) << TRI_FRACTION_BITS) 95 #define TRI_FRAC(x) ((x) & (TRI_ONE-1)) 96 #define TRI_FLOOR(x) ((x) & ~(TRI_ONE-1)) 97 #define TRI_CEIL(x) (((x) + (TRI_ONE-1)) & ~(TRI_ONE-1)) 98 #define TRI_ROUND(x) (((x) + TRI_HALF ) & ~(TRI_ONE-1)) 99 100 #define TRI_ROUDNING (1 << (16 - TRI_FRACTION_BITS - 1)) 101 #define TRI_FROM_FIXED(x) (((x)+TRI_ROUDNING) >> (16-TRI_FRACTION_BITS)) 102 103 #define TRI_SNAP_NEXT_HALF(x) (TRI_CEIL((x)+TRI_HALF) - TRI_HALF) 104 #define TRI_SNAP_PREV_HALF(x) (TRI_CEIL((x)-TRI_HALF) - TRI_HALF) 105 106 // ---------------------------------------------------------------------------- 107 108 const int GGL_COLOR_BITS = 24; 109 110 // To maintain 8-bits color chanels, with a maximum GGLSurface 111 // size of 4096 and GGL_SUBPIXEL_BITS=4, we need 8 + 12 + 4 = 24 bits 112 // for encoding the color iterators 113 114 inline GGLcolor gglFixedToIteratedColor(GGLfixed c) { 115 return (c << 8) - c; 116 } 117 118 // ---------------------------------------------------------------------------- 119 120 template<bool> struct CTA; 121 template<> struct CTA<true> { }; 122 123 #define GGL_CONTEXT(con, c) context_t *con = static_cast<context_t *>(c) 124 #define GGL_OFFSETOF(field) int(&(((context_t*)0)->field)) 125 #define GGL_INIT_PROC(p, f) p.f = ggl_ ## f; 126 #define GGL_BETWEEN(x, L, H) (uint32_t((x)-(L)) <= ((H)-(L))) 127 128 #define ggl_likely(x) __builtin_expect(!!(x), 1) 129 #define ggl_unlikely(x) __builtin_expect(!!(x), 0) 130 131 const int GGL_TEXTURE_UNIT_COUNT = 2; 132 const int GGL_TMU_STATE = 0x00000001; 133 const int GGL_CB_STATE = 0x00000002; 134 const int GGL_PIXEL_PIPELINE_STATE = 0x00000004; 135 136 // ---------------------------------------------------------------------------- 137 138 #define GGL_RESERVE_NEEDS(name, l, s) \ 139 const uint32_t GGL_NEEDS_##name##_MASK = (((1LU<<(s))-1)<<l); \ 140 const uint32_t GGL_NEEDS_##name##_SHIFT = (l); 141 142 #define GGL_BUILD_NEEDS(val, name) \ 143 (((val)<<(GGL_NEEDS_##name##_SHIFT)) & GGL_NEEDS_##name##_MASK) 144 145 #define GGL_READ_NEEDS(name, n) \ 146 (uint32_t(n & GGL_NEEDS_##name##_MASK) >> GGL_NEEDS_##name##_SHIFT) 147 148 #define GGL_NEED_MASK(name) (uint32_t(GGL_NEEDS_##name##_MASK)) 149 #define GGL_NEED(name, val) GGL_BUILD_NEEDS(val, name) 150 151 GGL_RESERVE_NEEDS( CB_FORMAT, 0, 6 ) 152 GGL_RESERVE_NEEDS( SHADE, 6, 1 ) 153 GGL_RESERVE_NEEDS( W, 7, 1 ) 154 GGL_RESERVE_NEEDS( BLEND_SRC, 8, 4 ) 155 GGL_RESERVE_NEEDS( BLEND_DST, 12, 4 ) 156 GGL_RESERVE_NEEDS( BLEND_SRCA, 16, 4 ) 157 GGL_RESERVE_NEEDS( BLEND_DSTA, 20, 4 ) 158 GGL_RESERVE_NEEDS( LOGIC_OP, 24, 4 ) 159 GGL_RESERVE_NEEDS( MASK_ARGB, 28, 4 ) 160 161 GGL_RESERVE_NEEDS( P_ALPHA_TEST, 0, 3 ) 162 GGL_RESERVE_NEEDS( P_AA, 3, 1 ) 163 GGL_RESERVE_NEEDS( P_DEPTH_TEST, 4, 3 ) 164 GGL_RESERVE_NEEDS( P_MASK_Z, 7, 1 ) 165 GGL_RESERVE_NEEDS( P_DITHER, 8, 1 ) 166 GGL_RESERVE_NEEDS( P_FOG, 9, 1 ) 167 GGL_RESERVE_NEEDS( P_RESERVED1, 10,22 ) 168 169 GGL_RESERVE_NEEDS( T_FORMAT, 0, 6 ) 170 GGL_RESERVE_NEEDS( T_RESERVED0, 6, 1 ) 171 GGL_RESERVE_NEEDS( T_POT, 7, 1 ) 172 GGL_RESERVE_NEEDS( T_S_WRAP, 8, 2 ) 173 GGL_RESERVE_NEEDS( T_T_WRAP, 10, 2 ) 174 GGL_RESERVE_NEEDS( T_ENV, 12, 3 ) 175 GGL_RESERVE_NEEDS( T_LINEAR, 15, 1 ) 176 177 const int GGL_NEEDS_WRAP_CLAMP_TO_EDGE = 0; 178 const int GGL_NEEDS_WRAP_REPEAT = 1; 179 const int GGL_NEEDS_WRAP_11 = 2; 180 181 inline uint32_t ggl_wrap_to_needs(uint32_t e) { 182 switch (e) { 183 case GGL_CLAMP: return GGL_NEEDS_WRAP_CLAMP_TO_EDGE; 184 case GGL_REPEAT: return GGL_NEEDS_WRAP_REPEAT; 185 } 186 return 0; 187 } 188 189 inline uint32_t ggl_blendfactor_to_needs(uint32_t b) { 190 if (b <= 1) return b; 191 return (b & 0xF)+2; 192 } 193 194 inline uint32_t ggl_needs_to_blendfactor(uint32_t n) { 195 if (n <= 1) return n; 196 return (n - 2) + 0x300; 197 } 198 199 inline uint32_t ggl_env_to_needs(uint32_t e) { 200 switch (e) { 201 case GGL_REPLACE: return 0; 202 case GGL_MODULATE: return 1; 203 case GGL_DECAL: return 2; 204 case GGL_BLEND: return 3; 205 case GGL_ADD: return 4; 206 } 207 return 0; 208 } 209 210 inline uint32_t ggl_needs_to_env(uint32_t n) { 211 const uint32_t envs[] = { GGL_REPLACE, GGL_MODULATE, 212 GGL_DECAL, GGL_BLEND, GGL_ADD }; 213 return envs[n]; 214 215 } 216 217 // ---------------------------------------------------------------------------- 218 219 enum { 220 GGL_ENABLE_BLENDING = 0x00000001, 221 GGL_ENABLE_SMOOTH = 0x00000002, 222 GGL_ENABLE_AA = 0x00000004, 223 GGL_ENABLE_LOGIC_OP = 0x00000008, 224 GGL_ENABLE_ALPHA_TEST = 0x00000010, 225 GGL_ENABLE_SCISSOR_TEST = 0x00000020, 226 GGL_ENABLE_TMUS = 0x00000040, 227 GGL_ENABLE_DEPTH_TEST = 0x00000080, 228 GGL_ENABLE_STENCIL_TEST = 0x00000100, 229 GGL_ENABLE_W = 0x00000200, 230 GGL_ENABLE_DITHER = 0x00000400, 231 GGL_ENABLE_FOG = 0x00000800, 232 GGL_ENABLE_POINT_AA_NICE= 0x00001000 233 }; 234 235 // ---------------------------------------------------------------------------- 236 237 class needs_filter_t; 238 struct needs_t { 239 inline int match(const needs_filter_t& filter); 240 inline bool operator == (const needs_t& rhs) const { 241 return (n==rhs.n) && 242 (p==rhs.p) && 243 (t[0]==rhs.t[0]) && 244 (t[1]==rhs.t[1]); 245 } 246 inline bool operator != (const needs_t& rhs) const { 247 return !operator == (rhs); 248 } 249 uint32_t n; 250 uint32_t p; 251 uint32_t t[GGL_TEXTURE_UNIT_COUNT]; 252 }; 253 254 inline int compare_type(const needs_t& lhs, const needs_t& rhs) { 255 return memcmp(&lhs, &rhs, sizeof(needs_t)); 256 } 257 258 struct needs_filter_t { 259 needs_t value; 260 needs_t mask; 261 }; 262 263 int needs_t::match(const needs_filter_t& filter) { 264 uint32_t result = 265 ((filter.value.n ^ n) & filter.mask.n) | 266 ((filter.value.p ^ p) & filter.mask.p) | 267 ((filter.value.t[0] ^ t[0]) & filter.mask.t[0]) | 268 ((filter.value.t[1] ^ t[1]) & filter.mask.t[1]); 269 return (result == 0); 270 } 271 272 // ---------------------------------------------------------------------------- 273 274 struct context_t; 275 class Assembly; 276 277 struct blend_state_t { 278 uint32_t src; 279 uint32_t dst; 280 uint32_t src_alpha; 281 uint32_t dst_alpha; 282 uint8_t reserved; 283 uint8_t alpha_separate; 284 uint8_t operation; 285 uint8_t equation; 286 }; 287 288 struct mask_state_t { 289 uint8_t color; 290 uint8_t depth; 291 uint32_t stencil; 292 }; 293 294 struct clear_state_t { 295 GGLclampx r; 296 GGLclampx g; 297 GGLclampx b; 298 GGLclampx a; 299 GGLclampx depth; 300 GGLint stencil; 301 uint32_t colorPacked; 302 uint32_t depthPacked; 303 uint32_t stencilPacked; 304 uint32_t dirty; 305 }; 306 307 struct fog_state_t { 308 uint8_t color[4]; 309 }; 310 311 struct logic_op_state_t { 312 uint16_t opcode; 313 }; 314 315 struct alpha_test_state_t { 316 uint16_t func; 317 GGLcolor ref; 318 }; 319 320 struct depth_test_state_t { 321 uint16_t func; 322 GGLclampx clearValue; 323 }; 324 325 struct scissor_t { 326 uint32_t user_left; 327 uint32_t user_right; 328 uint32_t user_top; 329 uint32_t user_bottom; 330 uint32_t left; 331 uint32_t right; 332 uint32_t top; 333 uint32_t bottom; 334 }; 335 336 struct pixel_t { 337 uint32_t c[4]; 338 uint8_t s[4]; 339 }; 340 341 struct surface_t { 342 union { 343 GGLSurface s; 344 struct { 345 uint32_t reserved; 346 uint32_t width; 347 uint32_t height; 348 int32_t stride; 349 uint8_t* data; 350 uint8_t format; 351 uint8_t dirty; 352 uint8_t pad[2]; 353 }; 354 }; 355 void (*read) (const surface_t* s, context_t* c, 356 uint32_t x, uint32_t y, pixel_t* pixel); 357 void (*write)(const surface_t* s, context_t* c, 358 uint32_t x, uint32_t y, const pixel_t* pixel); 359 }; 360 361 // ---------------------------------------------------------------------------- 362 363 struct texture_shade_t { 364 union { 365 struct { 366 int32_t is0; 367 int32_t idsdx; 368 int32_t idsdy; 369 int sscale; 370 int32_t it0; 371 int32_t idtdx; 372 int32_t idtdy; 373 int tscale; 374 }; 375 struct { 376 int32_t v; 377 int32_t dx; 378 int32_t dy; 379 int scale; 380 } st[2]; 381 }; 382 }; 383 384 struct texture_iterators_t { 385 // these are not encoded in the same way than in the 386 // texture_shade_t structure 387 union { 388 struct { 389 GGLfixed ydsdy; 390 GGLfixed dsdx; 391 GGLfixed dsdy; 392 int sscale; 393 GGLfixed ydtdy; 394 GGLfixed dtdx; 395 GGLfixed dtdy; 396 int tscale; 397 }; 398 struct { 399 GGLfixed ydvdy; 400 GGLfixed dvdx; 401 GGLfixed dvdy; 402 int scale; 403 } st[2]; 404 }; 405 }; 406 407 struct texture_t { 408 surface_t surface; 409 texture_iterators_t iterators; 410 texture_shade_t shade; 411 uint32_t s_coord; 412 uint32_t t_coord; 413 uint16_t s_wrap; 414 uint16_t t_wrap; 415 uint16_t min_filter; 416 uint16_t mag_filter; 417 uint16_t env; 418 uint8_t env_color[4]; 419 uint8_t enable; 420 uint8_t dirty; 421 }; 422 423 struct raster_t { 424 GGLfixed x; 425 GGLfixed y; 426 }; 427 428 struct framebuffer_t { 429 surface_t color; 430 surface_t read; 431 surface_t depth; 432 surface_t stencil; 433 int16_t *coverage; 434 size_t coverageBufferSize; 435 }; 436 437 // ---------------------------------------------------------------------------- 438 439 struct iterators_t { 440 int32_t xl; 441 int32_t xr; 442 int32_t y; 443 GGLcolor ydady; 444 GGLcolor ydrdy; 445 GGLcolor ydgdy; 446 GGLcolor ydbdy; 447 GGLfixed ydzdy; 448 GGLfixed ydwdy; 449 GGLfixed ydfdy; 450 }; 451 452 struct shade_t { 453 GGLcolor a0; 454 GGLcolor dadx; 455 GGLcolor dady; 456 GGLcolor r0; 457 GGLcolor drdx; 458 GGLcolor drdy; 459 GGLcolor g0; 460 GGLcolor dgdx; 461 GGLcolor dgdy; 462 GGLcolor b0; 463 GGLcolor dbdx; 464 GGLcolor dbdy; 465 uint32_t z0; 466 GGLfixed32 dzdx; 467 GGLfixed32 dzdy; 468 GGLfixed w0; 469 GGLfixed dwdx; 470 GGLfixed dwdy; 471 uint32_t f0; 472 GGLfixed dfdx; 473 GGLfixed dfdy; 474 }; 475 476 // these are used in the generated code 477 // we use this mirror structure to improve 478 // data locality in the pixel pipeline 479 struct generated_tex_vars_t { 480 uint32_t width; 481 uint32_t height; 482 uint32_t stride; 483 int32_t data; 484 int32_t dsdx; 485 int32_t dtdx; 486 int32_t spill[2]; 487 }; 488 489 struct generated_vars_t { 490 struct { 491 int32_t c; 492 int32_t dx; 493 } argb[4]; 494 int32_t aref; 495 int32_t dzdx; 496 int32_t zbase; 497 int32_t f; 498 int32_t dfdx; 499 int32_t spill[3]; 500 generated_tex_vars_t texture[GGL_TEXTURE_UNIT_COUNT]; 501 int32_t rt; 502 int32_t lb; 503 }; 504 505 // ---------------------------------------------------------------------------- 506 507 struct state_t { 508 framebuffer_t buffers; 509 texture_t texture[GGL_TEXTURE_UNIT_COUNT]; 510 scissor_t scissor; 511 raster_t raster; 512 blend_state_t blend; 513 alpha_test_state_t alpha_test; 514 depth_test_state_t depth_test; 515 mask_state_t mask; 516 clear_state_t clear; 517 fog_state_t fog; 518 logic_op_state_t logic_op; 519 uint32_t enables; 520 uint32_t enabled_tmu; 521 needs_t needs; 522 }; 523 524 // ---------------------------------------------------------------------------- 525 526 struct context_t { 527 GGLContext procs; 528 state_t state; 529 shade_t shade; 530 iterators_t iterators; 531 generated_vars_t generated_vars __attribute__((aligned(32))); 532 uint8_t ditherMatrix[GGL_DITHER_SIZE] __attribute__((aligned(32))); 533 uint32_t packed; 534 uint32_t packed8888; 535 const GGLFormat* formats; 536 uint32_t dirty; 537 texture_t* activeTMU; 538 uint32_t activeTMUIndex; 539 540 void (*init_y)(context_t* c, int32_t y); 541 void (*step_y)(context_t* c); 542 void (*scanline)(context_t* c); 543 void (*span)(context_t* c); 544 void (*rect)(context_t* c, size_t yc); 545 546 void* base; 547 Assembly* scanline_as; 548 GGLenum error; 549 }; 550 551 // ---------------------------------------------------------------------------- 552 553 void ggl_init_context(context_t* context); 554 void ggl_uninit_context(context_t* context); 555 void ggl_error(context_t* c, GGLenum error); 556 int64_t ggl_system_time(); 557 558 // ---------------------------------------------------------------------------- 559 560 }; 561 562 #endif // ANDROID_GGL_CONTEXT_H 563 564
