1 /* libs/pixelflinger/scanline.cpp 2 ** 3 ** Copyright 2006-2011, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 19 #define LOG_TAG "pixelflinger" 20 21 #include <assert.h> 22 #include <stdlib.h> 23 #include <stdio.h> 24 #include <string.h> 25 26 #include <cutils/memory.h> 27 #include <cutils/log.h> 28 29 #include "buffer.h" 30 #include "scanline.h" 31 32 #include "codeflinger/CodeCache.h" 33 #include "codeflinger/GGLAssembler.h" 34 #include "codeflinger/ARMAssembler.h" 35 #if defined(__mips__) 36 #include "codeflinger/MIPSAssembler.h" 37 #endif 38 //#include "codeflinger/ARMAssemblerOptimizer.h" 39 40 // ---------------------------------------------------------------------------- 41 42 #define ANDROID_CODEGEN_GENERIC 0 // force generic pixel pipeline 43 #define ANDROID_CODEGEN_C 1 // hand-written C, fallback generic 44 #define ANDROID_CODEGEN_ASM 2 // hand-written asm, fallback generic 45 #define ANDROID_CODEGEN_GENERATED 3 // hand-written asm, fallback codegen 46 47 #ifdef NDEBUG 48 # define ANDROID_RELEASE 49 # define ANDROID_CODEGEN ANDROID_CODEGEN_GENERATED 50 #else 51 # define ANDROID_DEBUG 52 # define ANDROID_CODEGEN ANDROID_CODEGEN_GENERATED 53 #endif 54 55 #if defined(__arm__) || defined(__mips__) 56 # define ANDROID_ARM_CODEGEN 1 57 #else 58 # define ANDROID_ARM_CODEGEN 0 59 #endif 60 61 #define DEBUG__CODEGEN_ONLY 0 62 63 /* Set to 1 to dump to the log the states that need a new 64 * code-generated scanline callback, i.e. those that don't 65 * have a corresponding shortcut function. 66 */ 67 #define DEBUG_NEEDS 0 68 69 #ifdef __mips__ 70 #define ASSEMBLY_SCRATCH_SIZE 4096 71 #else 72 #define ASSEMBLY_SCRATCH_SIZE 2048 73 #endif 74 75 // ---------------------------------------------------------------------------- 76 namespace android { 77 // ---------------------------------------------------------------------------- 78 79 static void init_y(context_t*, int32_t); 80 static void init_y_noop(context_t*, int32_t); 81 static void init_y_packed(context_t*, int32_t); 82 static void init_y_error(context_t*, int32_t); 83 84 static void step_y__generic(context_t* c); 85 static void step_y__nop(context_t*); 86 static void step_y__smooth(context_t* c); 87 static void step_y__tmu(context_t* c); 88 static void step_y__w(context_t* c); 89 90 static void scanline(context_t* c); 91 static void scanline_perspective(context_t* c); 92 static void scanline_perspective_single(context_t* c); 93 static void scanline_t32cb16blend(context_t* c); 94 static void scanline_t32cb16blend_dither(context_t* c); 95 static void scanline_t32cb16blend_srca(context_t* c); 96 static void scanline_t32cb16blend_clamp(context_t* c); 97 static void scanline_t32cb16blend_clamp_dither(context_t* c); 98 static void scanline_t32cb16blend_clamp_mod(context_t* c); 99 static void scanline_x32cb16blend_clamp_mod(context_t* c); 100 static void scanline_t32cb16blend_clamp_mod_dither(context_t* c); 101 static void scanline_x32cb16blend_clamp_mod_dither(context_t* c); 102 static void scanline_t32cb16(context_t* c); 103 static void scanline_t32cb16_dither(context_t* c); 104 static void scanline_t32cb16_clamp(context_t* c); 105 static void scanline_t32cb16_clamp_dither(context_t* c); 106 static void scanline_col32cb16blend(context_t* c); 107 static void scanline_t16cb16_clamp(context_t* c); 108 static void scanline_t16cb16blend_clamp_mod(context_t* c); 109 static void scanline_memcpy(context_t* c); 110 static void scanline_memset8(context_t* c); 111 static void scanline_memset16(context_t* c); 112 static void scanline_memset32(context_t* c); 113 static void scanline_noop(context_t* c); 114 static void scanline_set(context_t* c); 115 static void scanline_clear(context_t* c); 116 117 static void rect_generic(context_t* c, size_t yc); 118 static void rect_memcpy(context_t* c, size_t yc); 119 120 #if defined( __arm__) 121 extern "C" void scanline_t32cb16blend_arm(uint16_t*, uint32_t*, size_t); 122 extern "C" void scanline_t32cb16_arm(uint16_t *dst, uint32_t *src, size_t ct); 123 extern "C" void scanline_col32cb16blend_neon(uint16_t *dst, uint32_t *col, size_t ct); 124 extern "C" void scanline_col32cb16blend_arm(uint16_t *dst, uint32_t col, size_t ct); 125 #elif defined(__mips__) 126 extern "C" void scanline_t32cb16blend_mips(uint16_t*, uint32_t*, size_t); 127 #endif 128 129 // ---------------------------------------------------------------------------- 130 131 static inline uint16_t convertAbgr8888ToRgb565(uint32_t pix) 132 { 133 return uint16_t( ((pix << 8) & 0xf800) | 134 ((pix >> 5) & 0x07e0) | 135 ((pix >> 19) & 0x001f) ); 136 } 137 138 struct shortcut_t { 139 needs_filter_t filter; 140 const char* desc; 141 void (*scanline)(context_t*); 142 void (*init_y)(context_t*, int32_t); 143 }; 144 145 // Keep in sync with needs 146 147 /* To understand the values here, have a look at: 148 * system/core/include/private/pixelflinger/ggl_context.h 149 * 150 * Especially the lines defining and using GGL_RESERVE_NEEDS 151 * 152 * Quick reminders: 153 * - the last nibble of the first value is the destination buffer format. 154 * - the last nibble of the third value is the source texture format 155 * - formats: 4=rgb565 1=abgr8888 2=xbgr8888 156 * 157 * In the descriptions below: 158 * 159 * SRC means we copy the source pixels to the destination 160 * 161 * SRC_OVER means we blend the source pixels to the destination 162 * with dstFactor = 1-srcA, srcFactor=1 (premultiplied source). 163 * This mode is otherwise called 'blend'. 164 * 165 * SRCA_OVER means we blend the source pixels to the destination 166 * with dstFactor=srcA*(1-srcA) srcFactor=srcA (non-premul source). 167 * This mode is otherwise called 'blend_srca' 168 * 169 * clamp means we fetch source pixels from a texture with u/v clamping 170 * 171 * mod means the source pixels are modulated (multiplied) by the 172 * a/r/g/b of the current context's color. Typically used for 173 * fade-in / fade-out. 174 * 175 * dither means we dither 32 bit values to 16 bits 176 */ 177 static shortcut_t shortcuts[] = { 178 { { { 0x03515104, 0x00000077, { 0x00000A01, 0x00000000 } }, 179 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 180 "565 fb, 8888 tx, blend SRC_OVER", scanline_t32cb16blend, init_y_noop }, 181 { { { 0x03010104, 0x00000077, { 0x00000A01, 0x00000000 } }, 182 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 183 "565 fb, 8888 tx, SRC", scanline_t32cb16, init_y_noop }, 184 /* same as first entry, but with dithering */ 185 { { { 0x03515104, 0x00000177, { 0x00000A01, 0x00000000 } }, 186 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 187 "565 fb, 8888 tx, blend SRC_OVER dither", scanline_t32cb16blend_dither, init_y_noop }, 188 /* same as second entry, but with dithering */ 189 { { { 0x03010104, 0x00000177, { 0x00000A01, 0x00000000 } }, 190 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 191 "565 fb, 8888 tx, SRC dither", scanline_t32cb16_dither, init_y_noop }, 192 /* this is used during the boot animation - CHEAT: ignore dithering */ 193 { { { 0x03545404, 0x00000077, { 0x00000A01, 0x00000000 } }, 194 { 0xFFFFFFFF, 0xFFFFFEFF, { 0xFFFFFFFF, 0x0000003F } } }, 195 "565 fb, 8888 tx, blend dst:ONE_MINUS_SRCA src:SRCA", scanline_t32cb16blend_srca, init_y_noop }, 196 /* special case for arbitrary texture coordinates (think scaling) */ 197 { { { 0x03515104, 0x00000077, { 0x00000001, 0x00000000 } }, 198 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 199 "565 fb, 8888 tx, SRC_OVER clamp", scanline_t32cb16blend_clamp, init_y }, 200 { { { 0x03515104, 0x00000177, { 0x00000001, 0x00000000 } }, 201 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 202 "565 fb, 8888 tx, SRC_OVER clamp dither", scanline_t32cb16blend_clamp_dither, init_y }, 203 /* another case used during emulation */ 204 { { { 0x03515104, 0x00000077, { 0x00001001, 0x00000000 } }, 205 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 206 "565 fb, 8888 tx, SRC_OVER clamp modulate", scanline_t32cb16blend_clamp_mod, init_y }, 207 /* and this */ 208 { { { 0x03515104, 0x00000077, { 0x00001002, 0x00000000 } }, 209 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 210 "565 fb, x888 tx, SRC_OVER clamp modulate", scanline_x32cb16blend_clamp_mod, init_y }, 211 { { { 0x03515104, 0x00000177, { 0x00001001, 0x00000000 } }, 212 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 213 "565 fb, 8888 tx, SRC_OVER clamp modulate dither", scanline_t32cb16blend_clamp_mod_dither, init_y }, 214 { { { 0x03515104, 0x00000177, { 0x00001002, 0x00000000 } }, 215 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 216 "565 fb, x888 tx, SRC_OVER clamp modulate dither", scanline_x32cb16blend_clamp_mod_dither, init_y }, 217 { { { 0x03010104, 0x00000077, { 0x00000001, 0x00000000 } }, 218 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 219 "565 fb, 8888 tx, SRC clamp", scanline_t32cb16_clamp, init_y }, 220 { { { 0x03010104, 0x00000077, { 0x00000002, 0x00000000 } }, 221 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 222 "565 fb, x888 tx, SRC clamp", scanline_t32cb16_clamp, init_y }, 223 { { { 0x03010104, 0x00000177, { 0x00000001, 0x00000000 } }, 224 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 225 "565 fb, 8888 tx, SRC clamp dither", scanline_t32cb16_clamp_dither, init_y }, 226 { { { 0x03010104, 0x00000177, { 0x00000002, 0x00000000 } }, 227 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 228 "565 fb, x888 tx, SRC clamp dither", scanline_t32cb16_clamp_dither, init_y }, 229 { { { 0x03010104, 0x00000077, { 0x00000004, 0x00000000 } }, 230 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 231 "565 fb, 565 tx, SRC clamp", scanline_t16cb16_clamp, init_y }, 232 { { { 0x03515104, 0x00000077, { 0x00001004, 0x00000000 } }, 233 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } }, 234 "565 fb, 565 tx, SRC_OVER clamp", scanline_t16cb16blend_clamp_mod, init_y }, 235 { { { 0x03515104, 0x00000077, { 0x00000000, 0x00000000 } }, 236 { 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0xFFFFFFFF } } }, 237 "565 fb, 8888 fixed color", scanline_col32cb16blend, init_y_packed }, 238 { { { 0x00000000, 0x00000000, { 0x00000000, 0x00000000 } }, 239 { 0x00000000, 0x00000007, { 0x00000000, 0x00000000 } } }, 240 "(nop) alpha test", scanline_noop, init_y_noop }, 241 { { { 0x00000000, 0x00000000, { 0x00000000, 0x00000000 } }, 242 { 0x00000000, 0x00000070, { 0x00000000, 0x00000000 } } }, 243 "(nop) depth test", scanline_noop, init_y_noop }, 244 { { { 0x05000000, 0x00000000, { 0x00000000, 0x00000000 } }, 245 { 0x0F000000, 0x00000080, { 0x00000000, 0x00000000 } } }, 246 "(nop) logic_op", scanline_noop, init_y_noop }, 247 { { { 0xF0000000, 0x00000000, { 0x00000000, 0x00000000 } }, 248 { 0xF0000000, 0x00000080, { 0x00000000, 0x00000000 } } }, 249 "(nop) color mask", scanline_noop, init_y_noop }, 250 { { { 0x0F000000, 0x00000077, { 0x00000000, 0x00000000 } }, 251 { 0xFF000000, 0x000000F7, { 0x00000000, 0x00000000 } } }, 252 "(set) logic_op", scanline_set, init_y_noop }, 253 { { { 0x00000000, 0x00000077, { 0x00000000, 0x00000000 } }, 254 { 0xFF000000, 0x000000F7, { 0x00000000, 0x00000000 } } }, 255 "(clear) logic_op", scanline_clear, init_y_noop }, 256 { { { 0x03000000, 0x00000077, { 0x00000000, 0x00000000 } }, 257 { 0xFFFFFF00, 0x000000F7, { 0x00000000, 0x00000000 } } }, 258 "(clear) blending 0/0", scanline_clear, init_y_noop }, 259 { { { 0x00000000, 0x00000000, { 0x00000000, 0x00000000 } }, 260 { 0x0000003F, 0x00000000, { 0x00000000, 0x00000000 } } }, 261 "(error) invalid color-buffer format", scanline_noop, init_y_error }, 262 }; 263 static const needs_filter_t noblend1to1 = { 264 // (disregard dithering, see below) 265 { 0x03010100, 0x00000077, { 0x00000A00, 0x00000000 } }, 266 { 0xFFFFFFC0, 0xFFFFFEFF, { 0xFFFFFFC0, 0x0000003F } } 267 }; 268 static const needs_filter_t fill16noblend = { 269 { 0x03010100, 0x00000077, { 0x00000000, 0x00000000 } }, 270 { 0xFFFFFFC0, 0xFFFFFFFF, { 0x0000003F, 0x0000003F } } 271 }; 272 273 // ---------------------------------------------------------------------------- 274 275 #if ANDROID_ARM_CODEGEN 276 277 #if defined(__mips__) 278 static CodeCache gCodeCache(32 * 1024); 279 #else 280 static CodeCache gCodeCache(12 * 1024); 281 #endif 282 283 class ScanlineAssembly : public Assembly { 284 AssemblyKey<needs_t> mKey; 285 public: 286 ScanlineAssembly(needs_t needs, size_t size) 287 : Assembly(size), mKey(needs) { } 288 const AssemblyKey<needs_t>& key() const { return mKey; } 289 }; 290 #endif 291 292 // ---------------------------------------------------------------------------- 293 294 void ggl_init_scanline(context_t* c) 295 { 296 c->init_y = init_y; 297 c->step_y = step_y__generic; 298 c->scanline = scanline; 299 } 300 301 void ggl_uninit_scanline(context_t* c) 302 { 303 if (c->state.buffers.coverage) 304 free(c->state.buffers.coverage); 305 #if ANDROID_ARM_CODEGEN 306 if (c->scanline_as) 307 c->scanline_as->decStrong(c); 308 #endif 309 } 310 311 // ---------------------------------------------------------------------------- 312 313 static void pick_scanline(context_t* c) 314 { 315 #if (!defined(DEBUG__CODEGEN_ONLY) || (DEBUG__CODEGEN_ONLY == 0)) 316 317 #if ANDROID_CODEGEN == ANDROID_CODEGEN_GENERIC 318 c->init_y = init_y; 319 c->step_y = step_y__generic; 320 c->scanline = scanline; 321 return; 322 #endif 323 324 //printf("*** needs [%08lx:%08lx:%08lx:%08lx]\n", 325 // c->state.needs.n, c->state.needs.p, 326 // c->state.needs.t[0], c->state.needs.t[1]); 327 328 // first handle the special case that we cannot test with a filter 329 const uint32_t cb_format = GGL_READ_NEEDS(CB_FORMAT, c->state.needs.n); 330 if (GGL_READ_NEEDS(T_FORMAT, c->state.needs.t[0]) == cb_format) { 331 if (c->state.needs.match(noblend1to1)) { 332 // this will match regardless of dithering state, since both 333 // src and dest have the same format anyway, there is no dithering 334 // to be done. 335 const GGLFormat* f = 336 &(c->formats[GGL_READ_NEEDS(T_FORMAT, c->state.needs.t[0])]); 337 if ((f->components == GGL_RGB) || 338 (f->components == GGL_RGBA) || 339 (f->components == GGL_LUMINANCE) || 340 (f->components == GGL_LUMINANCE_ALPHA)) 341 { 342 // format must have all of RGB components 343 // (so the current color doesn't show through) 344 c->scanline = scanline_memcpy; 345 c->init_y = init_y_noop; 346 return; 347 } 348 } 349 } 350 351 if (c->state.needs.match(fill16noblend)) { 352 c->init_y = init_y_packed; 353 switch (c->formats[cb_format].size) { 354 case 1: c->scanline = scanline_memset8; return; 355 case 2: c->scanline = scanline_memset16; return; 356 case 4: c->scanline = scanline_memset32; return; 357 } 358 } 359 360 const int numFilters = sizeof(shortcuts)/sizeof(shortcut_t); 361 for (int i=0 ; i<numFilters ; i++) { 362 if (c->state.needs.match(shortcuts[i].filter)) { 363 c->scanline = shortcuts[i].scanline; 364 c->init_y = shortcuts[i].init_y; 365 return; 366 } 367 } 368 369 #if DEBUG_NEEDS 370 ALOGI("Needs: n=0x%08x p=0x%08x t0=0x%08x t1=0x%08x", 371 c->state.needs.n, c->state.needs.p, 372 c->state.needs.t[0], c->state.needs.t[1]); 373 #endif 374 375 #endif // DEBUG__CODEGEN_ONLY 376 377 c->init_y = init_y; 378 c->step_y = step_y__generic; 379 380 #if ANDROID_ARM_CODEGEN 381 // we're going to have to generate some code... 382 // here, generate code for our pixel pipeline 383 const AssemblyKey<needs_t> key(c->state.needs); 384 sp<Assembly> assembly = gCodeCache.lookup(key); 385 if (assembly == 0) { 386 // create a new assembly region 387 sp<ScanlineAssembly> a = new ScanlineAssembly(c->state.needs, 388 ASSEMBLY_SCRATCH_SIZE); 389 // initialize our assembler 390 #if defined(__arm__) 391 GGLAssembler assembler( new ARMAssembler(a) ); 392 //GGLAssembler assembler( 393 // new ARMAssemblerOptimizer(new ARMAssembler(a)) ); 394 #endif 395 #if defined(__mips__) 396 GGLAssembler assembler( new ArmToMipsAssembler(a) ); 397 #endif 398 // generate the scanline code for the given needs 399 int err = assembler.scanline(c->state.needs, c); 400 if (ggl_likely(!err)) { 401 // finally, cache this assembly 402 err = gCodeCache.cache(a->key(), a); 403 } 404 if (ggl_unlikely(err)) { 405 ALOGE("error generating or caching assembly. Reverting to NOP."); 406 c->scanline = scanline_noop; 407 c->init_y = init_y_noop; 408 c->step_y = step_y__nop; 409 return; 410 } 411 assembly = a; 412 } 413 414 // release the previous assembly 415 if (c->scanline_as) { 416 c->scanline_as->decStrong(c); 417 } 418 419 //ALOGI("using generated pixel-pipeline"); 420 c->scanline_as = assembly.get(); 421 c->scanline_as->incStrong(c); // hold on to assembly 422 c->scanline = (void(*)(context_t* c))assembly->base(); 423 #else 424 // ALOGW("using generic (slow) pixel-pipeline"); 425 c->scanline = scanline; 426 #endif 427 } 428 429 void ggl_pick_scanline(context_t* c) 430 { 431 pick_scanline(c); 432 if ((c->state.enables & GGL_ENABLE_W) && 433 (c->state.enables & GGL_ENABLE_TMUS)) 434 { 435 c->span = c->scanline; 436 c->scanline = scanline_perspective; 437 if (!(c->state.enabled_tmu & (c->state.enabled_tmu - 1))) { 438 // only one TMU enabled 439 c->scanline = scanline_perspective_single; 440 } 441 } 442 } 443 444 // ---------------------------------------------------------------------------- 445 446 static void blending(context_t* c, pixel_t* fragment, pixel_t* fb); 447 static void blend_factor(context_t* c, pixel_t* r, uint32_t factor, 448 const pixel_t* src, const pixel_t* dst); 449 static void rescale(uint32_t& u, uint8_t& su, uint32_t& v, uint8_t& sv); 450 451 #if ANDROID_ARM_CODEGEN && (ANDROID_CODEGEN == ANDROID_CODEGEN_GENERATED) 452 453 // no need to compile the generic-pipeline, it can't be reached 454 void scanline(context_t*) 455 { 456 } 457 458 #else 459 460 void rescale(uint32_t& u, uint8_t& su, uint32_t& v, uint8_t& sv) 461 { 462 if (su && sv) { 463 if (su > sv) { 464 v = ggl_expand(v, sv, su); 465 sv = su; 466 } else if (su < sv) { 467 u = ggl_expand(u, su, sv); 468 su = sv; 469 } 470 } 471 } 472 473 void blending(context_t* c, pixel_t* fragment, pixel_t* fb) 474 { 475 rescale(fragment->c[0], fragment->s[0], fb->c[0], fb->s[0]); 476 rescale(fragment->c[1], fragment->s[1], fb->c[1], fb->s[1]); 477 rescale(fragment->c[2], fragment->s[2], fb->c[2], fb->s[2]); 478 rescale(fragment->c[3], fragment->s[3], fb->c[3], fb->s[3]); 479 480 pixel_t sf, df; 481 blend_factor(c, &sf, c->state.blend.src, fragment, fb); 482 blend_factor(c, &df, c->state.blend.dst, fragment, fb); 483 484 fragment->c[1] = 485 gglMulAddx(fragment->c[1], sf.c[1], gglMulx(fb->c[1], df.c[1])); 486 fragment->c[2] = 487 gglMulAddx(fragment->c[2], sf.c[2], gglMulx(fb->c[2], df.c[2])); 488 fragment->c[3] = 489 gglMulAddx(fragment->c[3], sf.c[3], gglMulx(fb->c[3], df.c[3])); 490 491 if (c->state.blend.alpha_separate) { 492 blend_factor(c, &sf, c->state.blend.src_alpha, fragment, fb); 493 blend_factor(c, &df, c->state.blend.dst_alpha, fragment, fb); 494 } 495 496 fragment->c[0] = 497 gglMulAddx(fragment->c[0], sf.c[0], gglMulx(fb->c[0], df.c[0])); 498 499 // clamp to 1.0 500 if (fragment->c[0] >= (1LU<<fragment->s[0])) 501 fragment->c[0] = (1<<fragment->s[0])-1; 502 if (fragment->c[1] >= (1LU<<fragment->s[1])) 503 fragment->c[1] = (1<<fragment->s[1])-1; 504 if (fragment->c[2] >= (1LU<<fragment->s[2])) 505 fragment->c[2] = (1<<fragment->s[2])-1; 506 if (fragment->c[3] >= (1LU<<fragment->s[3])) 507 fragment->c[3] = (1<<fragment->s[3])-1; 508 } 509 510 static inline int blendfactor(uint32_t x, uint32_t size, uint32_t def = 0) 511 { 512 if (!size) 513 return def; 514 515 // scale to 16 bits 516 if (size > 16) { 517 x >>= (size - 16); 518 } else if (size < 16) { 519 x = ggl_expand(x, size, 16); 520 } 521 x += x >> 15; 522 return x; 523 } 524 525 void blend_factor(context_t* c, pixel_t* r, 526 uint32_t factor, const pixel_t* src, const pixel_t* dst) 527 { 528 switch (factor) { 529 case GGL_ZERO: 530 r->c[1] = 531 r->c[2] = 532 r->c[3] = 533 r->c[0] = 0; 534 break; 535 case GGL_ONE: 536 r->c[1] = 537 r->c[2] = 538 r->c[3] = 539 r->c[0] = FIXED_ONE; 540 break; 541 case GGL_DST_COLOR: 542 r->c[1] = blendfactor(dst->c[1], dst->s[1]); 543 r->c[2] = blendfactor(dst->c[2], dst->s[2]); 544 r->c[3] = blendfactor(dst->c[3], dst->s[3]); 545 r->c[0] = blendfactor(dst->c[0], dst->s[0]); 546 break; 547 case GGL_SRC_COLOR: 548 r->c[1] = blendfactor(src->c[1], src->s[1]); 549 r->c[2] = blendfactor(src->c[2], src->s[2]); 550 r->c[3] = blendfactor(src->c[3], src->s[3]); 551 r->c[0] = blendfactor(src->c[0], src->s[0]); 552 break; 553 case GGL_ONE_MINUS_DST_COLOR: 554 r->c[1] = FIXED_ONE - blendfactor(dst->c[1], dst->s[1]); 555 r->c[2] = FIXED_ONE - blendfactor(dst->c[2], dst->s[2]); 556 r->c[3] = FIXED_ONE - blendfactor(dst->c[3], dst->s[3]); 557 r->c[0] = FIXED_ONE - blendfactor(dst->c[0], dst->s[0]); 558 break; 559 case GGL_ONE_MINUS_SRC_COLOR: 560 r->c[1] = FIXED_ONE - blendfactor(src->c[1], src->s[1]); 561 r->c[2] = FIXED_ONE - blendfactor(src->c[2], src->s[2]); 562 r->c[3] = FIXED_ONE - blendfactor(src->c[3], src->s[3]); 563 r->c[0] = FIXED_ONE - blendfactor(src->c[0], src->s[0]); 564 break; 565 case GGL_SRC_ALPHA: 566 r->c[1] = 567 r->c[2] = 568 r->c[3] = 569 r->c[0] = blendfactor(src->c[0], src->s[0], FIXED_ONE); 570 break; 571 case GGL_ONE_MINUS_SRC_ALPHA: 572 r->c[1] = 573 r->c[2] = 574 r->c[3] = 575 r->c[0] = FIXED_ONE - blendfactor(src->c[0], src->s[0], FIXED_ONE); 576 break; 577 case GGL_DST_ALPHA: 578 r->c[1] = 579 r->c[2] = 580 r->c[3] = 581 r->c[0] = blendfactor(dst->c[0], dst->s[0], FIXED_ONE); 582 break; 583 case GGL_ONE_MINUS_DST_ALPHA: 584 r->c[1] = 585 r->c[2] = 586 r->c[3] = 587 r->c[0] = FIXED_ONE - blendfactor(dst->c[0], dst->s[0], FIXED_ONE); 588 break; 589 case GGL_SRC_ALPHA_SATURATE: 590 // XXX: GGL_SRC_ALPHA_SATURATE 591 break; 592 } 593 } 594 595 static GGLfixed wrapping(int32_t coord, uint32_t size, int tx_wrap) 596 { 597 GGLfixed d; 598 if (tx_wrap == GGL_REPEAT) { 599 d = (uint32_t(coord)>>16) * size; 600 } else if (tx_wrap == GGL_CLAMP) { // CLAMP_TO_EDGE semantics 601 const GGLfixed clamp_min = FIXED_HALF; 602 const GGLfixed clamp_max = (size << 16) - FIXED_HALF; 603 if (coord < clamp_min) coord = clamp_min; 604 if (coord > clamp_max) coord = clamp_max; 605 d = coord; 606 } else { // 1:1 607 const GGLfixed clamp_min = 0; 608 const GGLfixed clamp_max = (size << 16); 609 if (coord < clamp_min) coord = clamp_min; 610 if (coord > clamp_max) coord = clamp_max; 611 d = coord; 612 } 613 return d; 614 } 615 616 static inline 617 GGLcolor ADJUST_COLOR_ITERATOR(GGLcolor v, GGLcolor dvdx, int len) 618 { 619 const int32_t end = dvdx * (len-1) + v; 620 if (end < 0) 621 v -= end; 622 v &= ~(v>>31); 623 return v; 624 } 625 626 void scanline(context_t* c) 627 { 628 const uint32_t enables = c->state.enables; 629 const int xs = c->iterators.xl; 630 const int x1 = c->iterators.xr; 631 int xc = x1 - xs; 632 const int16_t* covPtr = c->state.buffers.coverage + xs; 633 634 // All iterated values are sampled at the pixel center 635 636 // reset iterators for that scanline... 637 GGLcolor r, g, b, a; 638 iterators_t& ci = c->iterators; 639 if (enables & GGL_ENABLE_SMOOTH) { 640 r = (xs * c->shade.drdx) + ci.ydrdy; 641 g = (xs * c->shade.dgdx) + ci.ydgdy; 642 b = (xs * c->shade.dbdx) + ci.ydbdy; 643 a = (xs * c->shade.dadx) + ci.ydady; 644 r = ADJUST_COLOR_ITERATOR(r, c->shade.drdx, xc); 645 g = ADJUST_COLOR_ITERATOR(g, c->shade.dgdx, xc); 646 b = ADJUST_COLOR_ITERATOR(b, c->shade.dbdx, xc); 647 a = ADJUST_COLOR_ITERATOR(a, c->shade.dadx, xc); 648 } else { 649 r = ci.ydrdy; 650 g = ci.ydgdy; 651 b = ci.ydbdy; 652 a = ci.ydady; 653 } 654 655 // z iterators are 1.31 656 GGLfixed z = (xs * c->shade.dzdx) + ci.ydzdy; 657 GGLfixed f = (xs * c->shade.dfdx) + ci.ydfdy; 658 659 struct { 660 GGLfixed s, t; 661 } tc[GGL_TEXTURE_UNIT_COUNT]; 662 if (enables & GGL_ENABLE_TMUS) { 663 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 664 if (c->state.texture[i].enable) { 665 texture_iterators_t& ti = c->state.texture[i].iterators; 666 if (enables & GGL_ENABLE_W) { 667 tc[i].s = ti.ydsdy; 668 tc[i].t = ti.ydtdy; 669 } else { 670 tc[i].s = (xs * ti.dsdx) + ti.ydsdy; 671 tc[i].t = (xs * ti.dtdx) + ti.ydtdy; 672 } 673 } 674 } 675 } 676 677 pixel_t fragment; 678 pixel_t texel; 679 pixel_t fb; 680 681 uint32_t x = xs; 682 uint32_t y = c->iterators.y; 683 684 while (xc--) { 685 686 { // just a scope 687 688 // read color (convert to 8 bits by keeping only the integer part) 689 fragment.s[1] = fragment.s[2] = 690 fragment.s[3] = fragment.s[0] = 8; 691 fragment.c[1] = r >> (GGL_COLOR_BITS-8); 692 fragment.c[2] = g >> (GGL_COLOR_BITS-8); 693 fragment.c[3] = b >> (GGL_COLOR_BITS-8); 694 fragment.c[0] = a >> (GGL_COLOR_BITS-8); 695 696 // texturing 697 if (enables & GGL_ENABLE_TMUS) { 698 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 699 texture_t& tx = c->state.texture[i]; 700 if (!tx.enable) 701 continue; 702 texture_iterators_t& ti = tx.iterators; 703 int32_t u, v; 704 705 // s-coordinate 706 if (tx.s_coord != GGL_ONE_TO_ONE) { 707 const int w = tx.surface.width; 708 u = wrapping(tc[i].s, w, tx.s_wrap); 709 tc[i].s += ti.dsdx; 710 } else { 711 u = (((tx.shade.is0>>16) + x)<<16) + FIXED_HALF; 712 } 713 714 // t-coordinate 715 if (tx.t_coord != GGL_ONE_TO_ONE) { 716 const int h = tx.surface.height; 717 v = wrapping(tc[i].t, h, tx.t_wrap); 718 tc[i].t += ti.dtdx; 719 } else { 720 v = (((tx.shade.it0>>16) + y)<<16) + FIXED_HALF; 721 } 722 723 // read texture 724 if (tx.mag_filter == GGL_NEAREST && 725 tx.min_filter == GGL_NEAREST) 726 { 727 u >>= 16; 728 v >>= 16; 729 tx.surface.read(&tx.surface, c, u, v, &texel); 730 } else { 731 const int w = tx.surface.width; 732 const int h = tx.surface.height; 733 u -= FIXED_HALF; 734 v -= FIXED_HALF; 735 int u0 = u >> 16; 736 int v0 = v >> 16; 737 int u1 = u0 + 1; 738 int v1 = v0 + 1; 739 if (tx.s_wrap == GGL_REPEAT) { 740 if (u0<0) u0 += w; 741 if (u1<0) u1 += w; 742 if (u0>=w) u0 -= w; 743 if (u1>=w) u1 -= w; 744 } else { 745 if (u0<0) u0 = 0; 746 if (u1<0) u1 = 0; 747 if (u0>=w) u0 = w-1; 748 if (u1>=w) u1 = w-1; 749 } 750 if (tx.t_wrap == GGL_REPEAT) { 751 if (v0<0) v0 += h; 752 if (v1<0) v1 += h; 753 if (v0>=h) v0 -= h; 754 if (v1>=h) v1 -= h; 755 } else { 756 if (v0<0) v0 = 0; 757 if (v1<0) v1 = 0; 758 if (v0>=h) v0 = h-1; 759 if (v1>=h) v1 = h-1; 760 } 761 pixel_t texels[4]; 762 uint32_t mm[4]; 763 tx.surface.read(&tx.surface, c, u0, v0, &texels[0]); 764 tx.surface.read(&tx.surface, c, u0, v1, &texels[1]); 765 tx.surface.read(&tx.surface, c, u1, v0, &texels[2]); 766 tx.surface.read(&tx.surface, c, u1, v1, &texels[3]); 767 u = (u >> 12) & 0xF; 768 v = (v >> 12) & 0xF; 769 u += u>>3; 770 v += v>>3; 771 mm[0] = (0x10 - u) * (0x10 - v); 772 mm[1] = (0x10 - u) * v; 773 mm[2] = u * (0x10 - v); 774 mm[3] = 0x100 - (mm[0] + mm[1] + mm[2]); 775 for (int j=0 ; j<4 ; j++) { 776 texel.s[j] = texels[0].s[j]; 777 if (!texel.s[j]) continue; 778 texel.s[j] += 8; 779 texel.c[j] = texels[0].c[j]*mm[0] + 780 texels[1].c[j]*mm[1] + 781 texels[2].c[j]*mm[2] + 782 texels[3].c[j]*mm[3] ; 783 } 784 } 785 786 // Texture environnement... 787 for (int j=0 ; j<4 ; j++) { 788 uint32_t& Cf = fragment.c[j]; 789 uint32_t& Ct = texel.c[j]; 790 uint8_t& sf = fragment.s[j]; 791 uint8_t& st = texel.s[j]; 792 uint32_t At = texel.c[0]; 793 uint8_t sat = texel.s[0]; 794 switch (tx.env) { 795 case GGL_REPLACE: 796 if (st) { 797 Cf = Ct; 798 sf = st; 799 } 800 break; 801 case GGL_MODULATE: 802 if (st) { 803 uint32_t factor = Ct + (Ct>>(st-1)); 804 Cf = (Cf * factor) >> st; 805 } 806 break; 807 case GGL_DECAL: 808 if (sat) { 809 rescale(Cf, sf, Ct, st); 810 Cf += ((Ct - Cf) * (At + (At>>(sat-1)))) >> sat; 811 } 812 break; 813 case GGL_BLEND: 814 if (st) { 815 uint32_t Cc = tx.env_color[i]; 816 if (sf>8) Cc = (Cc * ((1<<sf)-1))>>8; 817 else if (sf<8) Cc = (Cc - (Cc>>(8-sf)))>>(8-sf); 818 uint32_t factor = Ct + (Ct>>(st-1)); 819 Cf = ((((1<<st) - factor) * Cf) + Ct*Cc)>>st; 820 } 821 break; 822 case GGL_ADD: 823 if (st) { 824 rescale(Cf, sf, Ct, st); 825 Cf += Ct; 826 } 827 break; 828 } 829 } 830 } 831 } 832 833 // coverage application 834 if (enables & GGL_ENABLE_AA) { 835 int16_t cf = *covPtr++; 836 fragment.c[0] = (int64_t(fragment.c[0]) * cf) >> 15; 837 } 838 839 // alpha-test 840 if (enables & GGL_ENABLE_ALPHA_TEST) { 841 GGLcolor ref = c->state.alpha_test.ref; 842 GGLcolor alpha = (uint64_t(fragment.c[0]) * 843 ((1<<GGL_COLOR_BITS)-1)) / ((1<<fragment.s[0])-1); 844 switch (c->state.alpha_test.func) { 845 case GGL_NEVER: goto discard; 846 case GGL_LESS: if (alpha<ref) break; goto discard; 847 case GGL_EQUAL: if (alpha==ref) break; goto discard; 848 case GGL_LEQUAL: if (alpha<=ref) break; goto discard; 849 case GGL_GREATER: if (alpha>ref) break; goto discard; 850 case GGL_NOTEQUAL: if (alpha!=ref) break; goto discard; 851 case GGL_GEQUAL: if (alpha>=ref) break; goto discard; 852 } 853 } 854 855 // depth test 856 if (c->state.buffers.depth.format) { 857 if (enables & GGL_ENABLE_DEPTH_TEST) { 858 surface_t* cb = &(c->state.buffers.depth); 859 uint16_t* p = (uint16_t*)(cb->data)+(x+(cb->stride*y)); 860 uint16_t zz = uint32_t(z)>>(16); 861 uint16_t depth = *p; 862 switch (c->state.depth_test.func) { 863 case GGL_NEVER: goto discard; 864 case GGL_LESS: if (zz<depth) break; goto discard; 865 case GGL_EQUAL: if (zz==depth) break; goto discard; 866 case GGL_LEQUAL: if (zz<=depth) break; goto discard; 867 case GGL_GREATER: if (zz>depth) break; goto discard; 868 case GGL_NOTEQUAL: if (zz!=depth) break; goto discard; 869 case GGL_GEQUAL: if (zz>=depth) break; goto discard; 870 } 871 // depth buffer is not enabled, if depth-test is not enabled 872 /* 873 fragment.s[1] = fragment.s[2] = 874 fragment.s[3] = fragment.s[0] = 8; 875 fragment.c[1] = 876 fragment.c[2] = 877 fragment.c[3] = 878 fragment.c[0] = 255 - (zz>>8); 879 */ 880 if (c->state.mask.depth) { 881 *p = zz; 882 } 883 } 884 } 885 886 // fog 887 if (enables & GGL_ENABLE_FOG) { 888 for (int i=1 ; i<=3 ; i++) { 889 GGLfixed fc = (c->state.fog.color[i] * 0x10000) / 0xFF; 890 uint32_t& c = fragment.c[i]; 891 uint8_t& s = fragment.s[i]; 892 c = (c * 0x10000) / ((1<<s)-1); 893 c = gglMulAddx(c, f, gglMulx(fc, 0x10000 - f)); 894 s = 16; 895 } 896 } 897 898 // blending 899 if (enables & GGL_ENABLE_BLENDING) { 900 fb.c[1] = fb.c[2] = fb.c[3] = fb.c[0] = 0; // placate valgrind 901 fb.s[1] = fb.s[2] = fb.s[3] = fb.s[0] = 0; 902 c->state.buffers.color.read( 903 &(c->state.buffers.color), c, x, y, &fb); 904 blending( c, &fragment, &fb ); 905 } 906 907 // write 908 c->state.buffers.color.write( 909 &(c->state.buffers.color), c, x, y, &fragment); 910 } 911 912 discard: 913 // iterate... 914 x += 1; 915 if (enables & GGL_ENABLE_SMOOTH) { 916 r += c->shade.drdx; 917 g += c->shade.dgdx; 918 b += c->shade.dbdx; 919 a += c->shade.dadx; 920 } 921 z += c->shade.dzdx; 922 f += c->shade.dfdx; 923 } 924 } 925 926 #endif // ANDROID_ARM_CODEGEN && (ANDROID_CODEGEN == ANDROID_CODEGEN_GENERATED) 927 928 // ---------------------------------------------------------------------------- 929 #if 0 930 #pragma mark - 931 #pragma mark Scanline 932 #endif 933 934 /* Used to parse a 32-bit source texture linearly. Usage is: 935 * 936 * horz_iterator32 hi(context); 937 * while (...) { 938 * uint32_t src_pixel = hi.get_pixel32(); 939 * ... 940 * } 941 * 942 * Use only for one-to-one texture mapping. 943 */ 944 struct horz_iterator32 { 945 horz_iterator32(context_t* c) { 946 const int x = c->iterators.xl; 947 const int y = c->iterators.y; 948 texture_t& tx = c->state.texture[0]; 949 const int32_t u = (tx.shade.is0>>16) + x; 950 const int32_t v = (tx.shade.it0>>16) + y; 951 m_src = reinterpret_cast<uint32_t*>(tx.surface.data)+(u+(tx.surface.stride*v)); 952 } 953 uint32_t get_pixel32() { 954 return *m_src++; 955 } 956 protected: 957 uint32_t* m_src; 958 }; 959 960 /* A variant for 16-bit source textures. */ 961 struct horz_iterator16 { 962 horz_iterator16(context_t* c) { 963 const int x = c->iterators.xl; 964 const int y = c->iterators.y; 965 texture_t& tx = c->state.texture[0]; 966 const int32_t u = (tx.shade.is0>>16) + x; 967 const int32_t v = (tx.shade.it0>>16) + y; 968 m_src = reinterpret_cast<uint16_t*>(tx.surface.data)+(u+(tx.surface.stride*v)); 969 } 970 uint16_t get_pixel16() { 971 return *m_src++; 972 } 973 protected: 974 uint16_t* m_src; 975 }; 976 977 /* A clamp iterator is used to iterate inside a texture with GGL_CLAMP. 978 * After initialization, call get_src16() or get_src32() to get the current 979 * texture pixel value. 980 */ 981 struct clamp_iterator { 982 clamp_iterator(context_t* c) { 983 const int xs = c->iterators.xl; 984 texture_t& tx = c->state.texture[0]; 985 texture_iterators_t& ti = tx.iterators; 986 m_s = (xs * ti.dsdx) + ti.ydsdy; 987 m_t = (xs * ti.dtdx) + ti.ydtdy; 988 m_ds = ti.dsdx; 989 m_dt = ti.dtdx; 990 m_width_m1 = tx.surface.width - 1; 991 m_height_m1 = tx.surface.height - 1; 992 m_data = tx.surface.data; 993 m_stride = tx.surface.stride; 994 } 995 uint16_t get_pixel16() { 996 int u, v; 997 get_uv(u, v); 998 uint16_t* src = reinterpret_cast<uint16_t*>(m_data) + (u + (m_stride*v)); 999 return src[0]; 1000 } 1001 uint32_t get_pixel32() { 1002 int u, v; 1003 get_uv(u, v); 1004 uint32_t* src = reinterpret_cast<uint32_t*>(m_data) + (u + (m_stride*v)); 1005 return src[0]; 1006 } 1007 private: 1008 void get_uv(int& u, int& v) { 1009 int uu = m_s >> 16; 1010 int vv = m_t >> 16; 1011 if (uu < 0) 1012 uu = 0; 1013 if (uu > m_width_m1) 1014 uu = m_width_m1; 1015 if (vv < 0) 1016 vv = 0; 1017 if (vv > m_height_m1) 1018 vv = m_height_m1; 1019 u = uu; 1020 v = vv; 1021 m_s += m_ds; 1022 m_t += m_dt; 1023 } 1024 1025 GGLfixed m_s, m_t; 1026 GGLfixed m_ds, m_dt; 1027 int m_width_m1, m_height_m1; 1028 uint8_t* m_data; 1029 int m_stride; 1030 }; 1031 1032 /* 1033 * The 'horizontal clamp iterator' variant corresponds to the case where 1034 * the 'v' coordinate doesn't change. This is useful to avoid one mult and 1035 * extra adds / checks per pixels, if the blending/processing operation after 1036 * this is very fast. 1037 */ 1038 static int is_context_horizontal(const context_t* c) { 1039 return (c->state.texture[0].iterators.dtdx == 0); 1040 } 1041 1042 struct horz_clamp_iterator { 1043 uint16_t get_pixel16() { 1044 int u = m_s >> 16; 1045 m_s += m_ds; 1046 if (u < 0) 1047 u = 0; 1048 if (u > m_width_m1) 1049 u = m_width_m1; 1050 const uint16_t* src = reinterpret_cast<const uint16_t*>(m_data); 1051 return src[u]; 1052 } 1053 uint32_t get_pixel32() { 1054 int u = m_s >> 16; 1055 m_s += m_ds; 1056 if (u < 0) 1057 u = 0; 1058 if (u > m_width_m1) 1059 u = m_width_m1; 1060 const uint32_t* src = reinterpret_cast<const uint32_t*>(m_data); 1061 return src[u]; 1062 } 1063 protected: 1064 void init(const context_t* c, int shift); 1065 GGLfixed m_s; 1066 GGLfixed m_ds; 1067 int m_width_m1; 1068 const uint8_t* m_data; 1069 }; 1070 1071 void horz_clamp_iterator::init(const context_t* c, int shift) 1072 { 1073 const int xs = c->iterators.xl; 1074 const texture_t& tx = c->state.texture[0]; 1075 const texture_iterators_t& ti = tx.iterators; 1076 m_s = (xs * ti.dsdx) + ti.ydsdy; 1077 m_ds = ti.dsdx; 1078 m_width_m1 = tx.surface.width-1; 1079 m_data = tx.surface.data; 1080 1081 GGLfixed t = (xs * ti.dtdx) + ti.ydtdy; 1082 int v = t >> 16; 1083 if (v < 0) 1084 v = 0; 1085 else if (v >= (int)tx.surface.height) 1086 v = (int)tx.surface.height-1; 1087 1088 m_data += (tx.surface.stride*v) << shift; 1089 } 1090 1091 struct horz_clamp_iterator16 : horz_clamp_iterator { 1092 horz_clamp_iterator16(const context_t* c) { 1093 init(c,1); 1094 }; 1095 }; 1096 1097 struct horz_clamp_iterator32 : horz_clamp_iterator { 1098 horz_clamp_iterator32(context_t* c) { 1099 init(c,2); 1100 }; 1101 }; 1102 1103 /* This is used to perform dithering operations. 1104 */ 1105 struct ditherer { 1106 ditherer(const context_t* c) { 1107 const int x = c->iterators.xl; 1108 const int y = c->iterators.y; 1109 m_line = &c->ditherMatrix[ ((y & GGL_DITHER_MASK)<<GGL_DITHER_ORDER_SHIFT) ]; 1110 m_index = x & GGL_DITHER_MASK; 1111 } 1112 void step(void) { 1113 m_index++; 1114 } 1115 int get_value(void) { 1116 int ret = m_line[m_index & GGL_DITHER_MASK]; 1117 m_index++; 1118 return ret; 1119 } 1120 uint16_t abgr8888ToRgb565(uint32_t s) { 1121 uint32_t r = s & 0xff; 1122 uint32_t g = (s >> 8) & 0xff; 1123 uint32_t b = (s >> 16) & 0xff; 1124 return rgb888ToRgb565(r,g,b); 1125 } 1126 /* The following assumes that r/g/b are in the 0..255 range each */ 1127 uint16_t rgb888ToRgb565(uint32_t& r, uint32_t& g, uint32_t &b) { 1128 int threshold = get_value(); 1129 /* dither in on GGL_DITHER_BITS, and each of r, g, b is on 8 bits */ 1130 r += (threshold >> (GGL_DITHER_BITS-8 +5)); 1131 g += (threshold >> (GGL_DITHER_BITS-8 +6)); 1132 b += (threshold >> (GGL_DITHER_BITS-8 +5)); 1133 if (r > 0xff) 1134 r = 0xff; 1135 if (g > 0xff) 1136 g = 0xff; 1137 if (b > 0xff) 1138 b = 0xff; 1139 return uint16_t(((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3)); 1140 } 1141 protected: 1142 const uint8_t* m_line; 1143 int m_index; 1144 }; 1145 1146 /* This structure is used to blend (SRC_OVER) 32-bit source pixels 1147 * onto 16-bit destination ones. Usage is simply: 1148 * 1149 * blender.blend(<32-bit-src-pixel-value>,<ptr-to-16-bit-dest-pixel>) 1150 */ 1151 struct blender_32to16 { 1152 blender_32to16(context_t* c) { } 1153 void write(uint32_t s, uint16_t* dst) { 1154 if (s == 0) 1155 return; 1156 s = GGL_RGBA_TO_HOST(s); 1157 int sA = (s>>24); 1158 if (sA == 0xff) { 1159 *dst = convertAbgr8888ToRgb565(s); 1160 } else { 1161 int f = 0x100 - (sA + (sA>>7)); 1162 int sR = (s >> ( 3))&0x1F; 1163 int sG = (s >> ( 8+2))&0x3F; 1164 int sB = (s >> (16+3))&0x1F; 1165 uint16_t d = *dst; 1166 int dR = (d>>11)&0x1f; 1167 int dG = (d>>5)&0x3f; 1168 int dB = (d)&0x1f; 1169 sR += (f*dR)>>8; 1170 sG += (f*dG)>>8; 1171 sB += (f*dB)>>8; 1172 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1173 } 1174 } 1175 void write(uint32_t s, uint16_t* dst, ditherer& di) { 1176 if (s == 0) { 1177 di.step(); 1178 return; 1179 } 1180 s = GGL_RGBA_TO_HOST(s); 1181 int sA = (s>>24); 1182 if (sA == 0xff) { 1183 *dst = di.abgr8888ToRgb565(s); 1184 } else { 1185 int threshold = di.get_value() << (8 - GGL_DITHER_BITS); 1186 int f = 0x100 - (sA + (sA>>7)); 1187 int sR = (s >> ( 3))&0x1F; 1188 int sG = (s >> ( 8+2))&0x3F; 1189 int sB = (s >> (16+3))&0x1F; 1190 uint16_t d = *dst; 1191 int dR = (d>>11)&0x1f; 1192 int dG = (d>>5)&0x3f; 1193 int dB = (d)&0x1f; 1194 sR = ((sR << 8) + f*dR + threshold)>>8; 1195 sG = ((sG << 8) + f*dG + threshold)>>8; 1196 sB = ((sB << 8) + f*dB + threshold)>>8; 1197 if (sR > 0x1f) sR = 0x1f; 1198 if (sG > 0x3f) sG = 0x3f; 1199 if (sB > 0x1f) sB = 0x1f; 1200 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1201 } 1202 } 1203 }; 1204 1205 /* This blender does the same for the 'blend_srca' operation. 1206 * where dstFactor=srcA*(1-srcA) srcFactor=srcA 1207 */ 1208 struct blender_32to16_srcA { 1209 blender_32to16_srcA(const context_t* c) { } 1210 void write(uint32_t s, uint16_t* dst) { 1211 if (!s) { 1212 return; 1213 } 1214 uint16_t d = *dst; 1215 s = GGL_RGBA_TO_HOST(s); 1216 int sR = (s >> ( 3))&0x1F; 1217 int sG = (s >> ( 8+2))&0x3F; 1218 int sB = (s >> (16+3))&0x1F; 1219 int sA = (s>>24); 1220 int f1 = (sA + (sA>>7)); 1221 int f2 = 0x100-f1; 1222 int dR = (d>>11)&0x1f; 1223 int dG = (d>>5)&0x3f; 1224 int dB = (d)&0x1f; 1225 sR = (f1*sR + f2*dR)>>8; 1226 sG = (f1*sG + f2*dG)>>8; 1227 sB = (f1*sB + f2*dB)>>8; 1228 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1229 } 1230 }; 1231 1232 /* Common init code the modulating blenders */ 1233 struct blender_modulate { 1234 void init(const context_t* c) { 1235 const int r = c->iterators.ydrdy >> (GGL_COLOR_BITS-8); 1236 const int g = c->iterators.ydgdy >> (GGL_COLOR_BITS-8); 1237 const int b = c->iterators.ydbdy >> (GGL_COLOR_BITS-8); 1238 const int a = c->iterators.ydady >> (GGL_COLOR_BITS-8); 1239 m_r = r + (r >> 7); 1240 m_g = g + (g >> 7); 1241 m_b = b + (b >> 7); 1242 m_a = a + (a >> 7); 1243 } 1244 protected: 1245 int m_r, m_g, m_b, m_a; 1246 }; 1247 1248 /* This blender does a normal blend after modulation. 1249 */ 1250 struct blender_32to16_modulate : blender_modulate { 1251 blender_32to16_modulate(const context_t* c) { 1252 init(c); 1253 } 1254 void write(uint32_t s, uint16_t* dst) { 1255 // blend source and destination 1256 if (!s) { 1257 return; 1258 } 1259 s = GGL_RGBA_TO_HOST(s); 1260 1261 /* We need to modulate s */ 1262 uint32_t sA = (s >> 24); 1263 uint32_t sB = (s >> 16) & 0xff; 1264 uint32_t sG = (s >> 8) & 0xff; 1265 uint32_t sR = s & 0xff; 1266 1267 sA = (sA*m_a) >> 8; 1268 /* Keep R/G/B scaled to 5.8 or 6.8 fixed float format */ 1269 sR = (sR*m_r) >> (8 - 5); 1270 sG = (sG*m_g) >> (8 - 6); 1271 sB = (sB*m_b) >> (8 - 5); 1272 1273 /* Now do a normal blend */ 1274 int f = 0x100 - (sA + (sA>>7)); 1275 uint16_t d = *dst; 1276 int dR = (d>>11)&0x1f; 1277 int dG = (d>>5)&0x3f; 1278 int dB = (d)&0x1f; 1279 sR = (sR + f*dR)>>8; 1280 sG = (sG + f*dG)>>8; 1281 sB = (sB + f*dB)>>8; 1282 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1283 } 1284 void write(uint32_t s, uint16_t* dst, ditherer& di) { 1285 // blend source and destination 1286 if (!s) { 1287 di.step(); 1288 return; 1289 } 1290 s = GGL_RGBA_TO_HOST(s); 1291 1292 /* We need to modulate s */ 1293 uint32_t sA = (s >> 24); 1294 uint32_t sB = (s >> 16) & 0xff; 1295 uint32_t sG = (s >> 8) & 0xff; 1296 uint32_t sR = s & 0xff; 1297 1298 sA = (sA*m_a) >> 8; 1299 /* keep R/G/B scaled to 5.8 or 6.8 fixed float format */ 1300 sR = (sR*m_r) >> (8 - 5); 1301 sG = (sG*m_g) >> (8 - 6); 1302 sB = (sB*m_b) >> (8 - 5); 1303 1304 /* Scale threshold to 0.8 fixed float format */ 1305 int threshold = di.get_value() << (8 - GGL_DITHER_BITS); 1306 int f = 0x100 - (sA + (sA>>7)); 1307 uint16_t d = *dst; 1308 int dR = (d>>11)&0x1f; 1309 int dG = (d>>5)&0x3f; 1310 int dB = (d)&0x1f; 1311 sR = (sR + f*dR + threshold)>>8; 1312 sG = (sG + f*dG + threshold)>>8; 1313 sB = (sB + f*dB + threshold)>>8; 1314 if (sR > 0x1f) sR = 0x1f; 1315 if (sG > 0x3f) sG = 0x3f; 1316 if (sB > 0x1f) sB = 0x1f; 1317 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1318 } 1319 }; 1320 1321 /* same as 32to16_modulate, except that the input is xRGB, instead of ARGB */ 1322 struct blender_x32to16_modulate : blender_modulate { 1323 blender_x32to16_modulate(const context_t* c) { 1324 init(c); 1325 } 1326 void write(uint32_t s, uint16_t* dst) { 1327 s = GGL_RGBA_TO_HOST(s); 1328 1329 uint32_t sB = (s >> 16) & 0xff; 1330 uint32_t sG = (s >> 8) & 0xff; 1331 uint32_t sR = s & 0xff; 1332 1333 /* Keep R/G/B in 5.8 or 6.8 format */ 1334 sR = (sR*m_r) >> (8 - 5); 1335 sG = (sG*m_g) >> (8 - 6); 1336 sB = (sB*m_b) >> (8 - 5); 1337 1338 int f = 0x100 - m_a; 1339 uint16_t d = *dst; 1340 int dR = (d>>11)&0x1f; 1341 int dG = (d>>5)&0x3f; 1342 int dB = (d)&0x1f; 1343 sR = (sR + f*dR)>>8; 1344 sG = (sG + f*dG)>>8; 1345 sB = (sB + f*dB)>>8; 1346 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1347 } 1348 void write(uint32_t s, uint16_t* dst, ditherer& di) { 1349 s = GGL_RGBA_TO_HOST(s); 1350 1351 uint32_t sB = (s >> 16) & 0xff; 1352 uint32_t sG = (s >> 8) & 0xff; 1353 uint32_t sR = s & 0xff; 1354 1355 sR = (sR*m_r) >> (8 - 5); 1356 sG = (sG*m_g) >> (8 - 6); 1357 sB = (sB*m_b) >> (8 - 5); 1358 1359 /* Now do a normal blend */ 1360 int threshold = di.get_value() << (8 - GGL_DITHER_BITS); 1361 int f = 0x100 - m_a; 1362 uint16_t d = *dst; 1363 int dR = (d>>11)&0x1f; 1364 int dG = (d>>5)&0x3f; 1365 int dB = (d)&0x1f; 1366 sR = (sR + f*dR + threshold)>>8; 1367 sG = (sG + f*dG + threshold)>>8; 1368 sB = (sB + f*dB + threshold)>>8; 1369 if (sR > 0x1f) sR = 0x1f; 1370 if (sG > 0x3f) sG = 0x3f; 1371 if (sB > 0x1f) sB = 0x1f; 1372 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1373 } 1374 }; 1375 1376 /* Same as above, but source is 16bit rgb565 */ 1377 struct blender_16to16_modulate : blender_modulate { 1378 blender_16to16_modulate(const context_t* c) { 1379 init(c); 1380 } 1381 void write(uint16_t s16, uint16_t* dst) { 1382 uint32_t s = s16; 1383 1384 uint32_t sR = s >> 11; 1385 uint32_t sG = (s >> 5) & 0x3f; 1386 uint32_t sB = s & 0x1f; 1387 1388 sR = (sR*m_r); 1389 sG = (sG*m_g); 1390 sB = (sB*m_b); 1391 1392 int f = 0x100 - m_a; 1393 uint16_t d = *dst; 1394 int dR = (d>>11)&0x1f; 1395 int dG = (d>>5)&0x3f; 1396 int dB = (d)&0x1f; 1397 sR = (sR + f*dR)>>8; 1398 sG = (sG + f*dG)>>8; 1399 sB = (sB + f*dB)>>8; 1400 *dst = uint16_t((sR<<11)|(sG<<5)|sB); 1401 } 1402 }; 1403 1404 /* This is used to iterate over a 16-bit destination color buffer. 1405 * Usage is: 1406 * 1407 * dst_iterator16 di(context); 1408 * while (di.count--) { 1409 * <do stuff with dest pixel at di.dst> 1410 * di.dst++; 1411 * } 1412 */ 1413 struct dst_iterator16 { 1414 dst_iterator16(const context_t* c) { 1415 const int x = c->iterators.xl; 1416 const int width = c->iterators.xr - x; 1417 const int32_t y = c->iterators.y; 1418 const surface_t* cb = &(c->state.buffers.color); 1419 count = width; 1420 dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y)); 1421 } 1422 int count; 1423 uint16_t* dst; 1424 }; 1425 1426 1427 static void scanline_t32cb16_clamp(context_t* c) 1428 { 1429 dst_iterator16 di(c); 1430 1431 if (is_context_horizontal(c)) { 1432 /* Special case for simple horizontal scaling */ 1433 horz_clamp_iterator32 ci(c); 1434 while (di.count--) { 1435 uint32_t s = ci.get_pixel32(); 1436 *di.dst++ = convertAbgr8888ToRgb565(s); 1437 } 1438 } else { 1439 /* General case */ 1440 clamp_iterator ci(c); 1441 while (di.count--) { 1442 uint32_t s = ci.get_pixel32(); 1443 *di.dst++ = convertAbgr8888ToRgb565(s); 1444 } 1445 } 1446 } 1447 1448 static void scanline_t32cb16_dither(context_t* c) 1449 { 1450 horz_iterator32 si(c); 1451 dst_iterator16 di(c); 1452 ditherer dither(c); 1453 1454 while (di.count--) { 1455 uint32_t s = si.get_pixel32(); 1456 *di.dst++ = dither.abgr8888ToRgb565(s); 1457 } 1458 } 1459 1460 static void scanline_t32cb16_clamp_dither(context_t* c) 1461 { 1462 dst_iterator16 di(c); 1463 ditherer dither(c); 1464 1465 if (is_context_horizontal(c)) { 1466 /* Special case for simple horizontal scaling */ 1467 horz_clamp_iterator32 ci(c); 1468 while (di.count--) { 1469 uint32_t s = ci.get_pixel32(); 1470 *di.dst++ = dither.abgr8888ToRgb565(s); 1471 } 1472 } else { 1473 /* General case */ 1474 clamp_iterator ci(c); 1475 while (di.count--) { 1476 uint32_t s = ci.get_pixel32(); 1477 *di.dst++ = dither.abgr8888ToRgb565(s); 1478 } 1479 } 1480 } 1481 1482 static void scanline_t32cb16blend_dither(context_t* c) 1483 { 1484 dst_iterator16 di(c); 1485 ditherer dither(c); 1486 blender_32to16 bl(c); 1487 horz_iterator32 hi(c); 1488 while (di.count--) { 1489 uint32_t s = hi.get_pixel32(); 1490 bl.write(s, di.dst, dither); 1491 di.dst++; 1492 } 1493 } 1494 1495 static void scanline_t32cb16blend_clamp(context_t* c) 1496 { 1497 dst_iterator16 di(c); 1498 blender_32to16 bl(c); 1499 1500 if (is_context_horizontal(c)) { 1501 horz_clamp_iterator32 ci(c); 1502 while (di.count--) { 1503 uint32_t s = ci.get_pixel32(); 1504 bl.write(s, di.dst); 1505 di.dst++; 1506 } 1507 } else { 1508 clamp_iterator ci(c); 1509 while (di.count--) { 1510 uint32_t s = ci.get_pixel32(); 1511 bl.write(s, di.dst); 1512 di.dst++; 1513 } 1514 } 1515 } 1516 1517 static void scanline_t32cb16blend_clamp_dither(context_t* c) 1518 { 1519 dst_iterator16 di(c); 1520 ditherer dither(c); 1521 blender_32to16 bl(c); 1522 1523 clamp_iterator ci(c); 1524 while (di.count--) { 1525 uint32_t s = ci.get_pixel32(); 1526 bl.write(s, di.dst, dither); 1527 di.dst++; 1528 } 1529 } 1530 1531 void scanline_t32cb16blend_clamp_mod(context_t* c) 1532 { 1533 dst_iterator16 di(c); 1534 blender_32to16_modulate bl(c); 1535 1536 clamp_iterator ci(c); 1537 while (di.count--) { 1538 uint32_t s = ci.get_pixel32(); 1539 bl.write(s, di.dst); 1540 di.dst++; 1541 } 1542 } 1543 1544 void scanline_t32cb16blend_clamp_mod_dither(context_t* c) 1545 { 1546 dst_iterator16 di(c); 1547 blender_32to16_modulate bl(c); 1548 ditherer dither(c); 1549 1550 clamp_iterator ci(c); 1551 while (di.count--) { 1552 uint32_t s = ci.get_pixel32(); 1553 bl.write(s, di.dst, dither); 1554 di.dst++; 1555 } 1556 } 1557 1558 /* Variant of scanline_t32cb16blend_clamp_mod with a xRGB texture */ 1559 void scanline_x32cb16blend_clamp_mod(context_t* c) 1560 { 1561 dst_iterator16 di(c); 1562 blender_x32to16_modulate bl(c); 1563 1564 clamp_iterator ci(c); 1565 while (di.count--) { 1566 uint32_t s = ci.get_pixel32(); 1567 bl.write(s, di.dst); 1568 di.dst++; 1569 } 1570 } 1571 1572 void scanline_x32cb16blend_clamp_mod_dither(context_t* c) 1573 { 1574 dst_iterator16 di(c); 1575 blender_x32to16_modulate bl(c); 1576 ditherer dither(c); 1577 1578 clamp_iterator ci(c); 1579 while (di.count--) { 1580 uint32_t s = ci.get_pixel32(); 1581 bl.write(s, di.dst, dither); 1582 di.dst++; 1583 } 1584 } 1585 1586 void scanline_t16cb16_clamp(context_t* c) 1587 { 1588 dst_iterator16 di(c); 1589 1590 /* Special case for simple horizontal scaling */ 1591 if (is_context_horizontal(c)) { 1592 horz_clamp_iterator16 ci(c); 1593 while (di.count--) { 1594 *di.dst++ = ci.get_pixel16(); 1595 } 1596 } else { 1597 clamp_iterator ci(c); 1598 while (di.count--) { 1599 *di.dst++ = ci.get_pixel16(); 1600 } 1601 } 1602 } 1603 1604 1605 1606 template <typename T, typename U> 1607 static inline __attribute__((const)) 1608 T interpolate(int y, T v0, U dvdx, U dvdy) { 1609 // interpolates in pixel's centers 1610 // v = v0 + (y + 0.5) * dvdy + (0.5 * dvdx) 1611 return (y * dvdy) + (v0 + ((dvdy + dvdx) >> 1)); 1612 } 1613 1614 // ---------------------------------------------------------------------------- 1615 #if 0 1616 #pragma mark - 1617 #endif 1618 1619 void init_y(context_t* c, int32_t ys) 1620 { 1621 const uint32_t enables = c->state.enables; 1622 1623 // compute iterators... 1624 iterators_t& ci = c->iterators; 1625 1626 // sample in the center 1627 ci.y = ys; 1628 1629 if (enables & (GGL_ENABLE_DEPTH_TEST|GGL_ENABLE_W|GGL_ENABLE_FOG)) { 1630 ci.ydzdy = interpolate(ys, c->shade.z0, c->shade.dzdx, c->shade.dzdy); 1631 ci.ydwdy = interpolate(ys, c->shade.w0, c->shade.dwdx, c->shade.dwdy); 1632 ci.ydfdy = interpolate(ys, c->shade.f0, c->shade.dfdx, c->shade.dfdy); 1633 } 1634 1635 if (ggl_unlikely(enables & GGL_ENABLE_SMOOTH)) { 1636 ci.ydrdy = interpolate(ys, c->shade.r0, c->shade.drdx, c->shade.drdy); 1637 ci.ydgdy = interpolate(ys, c->shade.g0, c->shade.dgdx, c->shade.dgdy); 1638 ci.ydbdy = interpolate(ys, c->shade.b0, c->shade.dbdx, c->shade.dbdy); 1639 ci.ydady = interpolate(ys, c->shade.a0, c->shade.dadx, c->shade.dady); 1640 c->step_y = step_y__smooth; 1641 } else { 1642 ci.ydrdy = c->shade.r0; 1643 ci.ydgdy = c->shade.g0; 1644 ci.ydbdy = c->shade.b0; 1645 ci.ydady = c->shade.a0; 1646 // XXX: do only if needed, or make sure this is fast 1647 c->packed = ggl_pack_color(c, c->state.buffers.color.format, 1648 ci.ydrdy, ci.ydgdy, ci.ydbdy, ci.ydady); 1649 c->packed8888 = ggl_pack_color(c, GGL_PIXEL_FORMAT_RGBA_8888, 1650 ci.ydrdy, ci.ydgdy, ci.ydbdy, ci.ydady); 1651 } 1652 1653 // initialize the variables we need in the shader 1654 generated_vars_t& gen = c->generated_vars; 1655 gen.argb[GGLFormat::ALPHA].c = ci.ydady; 1656 gen.argb[GGLFormat::ALPHA].dx = c->shade.dadx; 1657 gen.argb[GGLFormat::RED ].c = ci.ydrdy; 1658 gen.argb[GGLFormat::RED ].dx = c->shade.drdx; 1659 gen.argb[GGLFormat::GREEN].c = ci.ydgdy; 1660 gen.argb[GGLFormat::GREEN].dx = c->shade.dgdx; 1661 gen.argb[GGLFormat::BLUE ].c = ci.ydbdy; 1662 gen.argb[GGLFormat::BLUE ].dx = c->shade.dbdx; 1663 gen.dzdx = c->shade.dzdx; 1664 gen.f = ci.ydfdy; 1665 gen.dfdx = c->shade.dfdx; 1666 1667 if (enables & GGL_ENABLE_TMUS) { 1668 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 1669 texture_t& t = c->state.texture[i]; 1670 if (!t.enable) continue; 1671 1672 texture_iterators_t& ti = t.iterators; 1673 if (t.s_coord == GGL_ONE_TO_ONE && t.t_coord == GGL_ONE_TO_ONE) { 1674 // we need to set all of these to 0 because in some cases 1675 // step_y__generic() or step_y__tmu() will be used and 1676 // therefore will update dtdy, however, in 1:1 mode 1677 // this is always done by the scanline rasterizer. 1678 ti.dsdx = ti.dsdy = ti.dtdx = ti.dtdy = 0; 1679 ti.ydsdy = t.shade.is0; 1680 ti.ydtdy = t.shade.it0; 1681 } else { 1682 const int adjustSWrap = ((t.s_wrap==GGL_CLAMP)?0:16); 1683 const int adjustTWrap = ((t.t_wrap==GGL_CLAMP)?0:16); 1684 ti.sscale = t.shade.sscale + adjustSWrap; 1685 ti.tscale = t.shade.tscale + adjustTWrap; 1686 if (!(enables & GGL_ENABLE_W)) { 1687 // S coordinate 1688 const int32_t sscale = ti.sscale; 1689 const int32_t sy = interpolate(ys, 1690 t.shade.is0, t.shade.idsdx, t.shade.idsdy); 1691 if (sscale>=0) { 1692 ti.ydsdy= sy << sscale; 1693 ti.dsdx = t.shade.idsdx << sscale; 1694 ti.dsdy = t.shade.idsdy << sscale; 1695 } else { 1696 ti.ydsdy= sy >> -sscale; 1697 ti.dsdx = t.shade.idsdx >> -sscale; 1698 ti.dsdy = t.shade.idsdy >> -sscale; 1699 } 1700 // T coordinate 1701 const int32_t tscale = ti.tscale; 1702 const int32_t ty = interpolate(ys, 1703 t.shade.it0, t.shade.idtdx, t.shade.idtdy); 1704 if (tscale>=0) { 1705 ti.ydtdy= ty << tscale; 1706 ti.dtdx = t.shade.idtdx << tscale; 1707 ti.dtdy = t.shade.idtdy << tscale; 1708 } else { 1709 ti.ydtdy= ty >> -tscale; 1710 ti.dtdx = t.shade.idtdx >> -tscale; 1711 ti.dtdy = t.shade.idtdy >> -tscale; 1712 } 1713 } 1714 } 1715 // mirror for generated code... 1716 generated_tex_vars_t& gen = c->generated_vars.texture[i]; 1717 gen.width = t.surface.width; 1718 gen.height = t.surface.height; 1719 gen.stride = t.surface.stride; 1720 gen.data = int32_t(t.surface.data); 1721 gen.dsdx = ti.dsdx; 1722 gen.dtdx = ti.dtdx; 1723 } 1724 } 1725 1726 // choose the y-stepper 1727 c->step_y = step_y__nop; 1728 if (enables & GGL_ENABLE_FOG) { 1729 c->step_y = step_y__generic; 1730 } else if (enables & GGL_ENABLE_TMUS) { 1731 if (enables & GGL_ENABLE_SMOOTH) { 1732 c->step_y = step_y__generic; 1733 } else if (enables & GGL_ENABLE_W) { 1734 c->step_y = step_y__w; 1735 } else { 1736 c->step_y = step_y__tmu; 1737 } 1738 } else { 1739 if (enables & GGL_ENABLE_SMOOTH) { 1740 c->step_y = step_y__smooth; 1741 } 1742 } 1743 1744 // choose the rectangle blitter 1745 c->rect = rect_generic; 1746 if ((c->step_y == step_y__nop) && 1747 (c->scanline == scanline_memcpy)) 1748 { 1749 c->rect = rect_memcpy; 1750 } 1751 } 1752 1753 void init_y_packed(context_t* c, int32_t y0) 1754 { 1755 uint8_t f = c->state.buffers.color.format; 1756 c->packed = ggl_pack_color(c, f, 1757 c->shade.r0, c->shade.g0, c->shade.b0, c->shade.a0); 1758 c->packed8888 = ggl_pack_color(c, GGL_PIXEL_FORMAT_RGBA_8888, 1759 c->shade.r0, c->shade.g0, c->shade.b0, c->shade.a0); 1760 c->iterators.y = y0; 1761 c->step_y = step_y__nop; 1762 // choose the rectangle blitter 1763 c->rect = rect_generic; 1764 if (c->scanline == scanline_memcpy) { 1765 c->rect = rect_memcpy; 1766 } 1767 } 1768 1769 void init_y_noop(context_t* c, int32_t y0) 1770 { 1771 c->iterators.y = y0; 1772 c->step_y = step_y__nop; 1773 // choose the rectangle blitter 1774 c->rect = rect_generic; 1775 if (c->scanline == scanline_memcpy) { 1776 c->rect = rect_memcpy; 1777 } 1778 } 1779 1780 void init_y_error(context_t* c, int32_t y0) 1781 { 1782 // woooops, shoud never happen, 1783 // fail gracefully (don't display anything) 1784 init_y_noop(c, y0); 1785 ALOGE("color-buffer has an invalid format!"); 1786 } 1787 1788 // ---------------------------------------------------------------------------- 1789 #if 0 1790 #pragma mark - 1791 #endif 1792 1793 void step_y__generic(context_t* c) 1794 { 1795 const uint32_t enables = c->state.enables; 1796 1797 // iterate... 1798 iterators_t& ci = c->iterators; 1799 ci.y += 1; 1800 1801 if (enables & GGL_ENABLE_SMOOTH) { 1802 ci.ydrdy += c->shade.drdy; 1803 ci.ydgdy += c->shade.dgdy; 1804 ci.ydbdy += c->shade.dbdy; 1805 ci.ydady += c->shade.dady; 1806 } 1807 1808 const uint32_t mask = 1809 GGL_ENABLE_DEPTH_TEST | 1810 GGL_ENABLE_W | 1811 GGL_ENABLE_FOG; 1812 if (enables & mask) { 1813 ci.ydzdy += c->shade.dzdy; 1814 ci.ydwdy += c->shade.dwdy; 1815 ci.ydfdy += c->shade.dfdy; 1816 } 1817 1818 if ((enables & GGL_ENABLE_TMUS) && (!(enables & GGL_ENABLE_W))) { 1819 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 1820 if (c->state.texture[i].enable) { 1821 texture_iterators_t& ti = c->state.texture[i].iterators; 1822 ti.ydsdy += ti.dsdy; 1823 ti.ydtdy += ti.dtdy; 1824 } 1825 } 1826 } 1827 } 1828 1829 void step_y__nop(context_t* c) 1830 { 1831 c->iterators.y += 1; 1832 c->iterators.ydzdy += c->shade.dzdy; 1833 } 1834 1835 void step_y__smooth(context_t* c) 1836 { 1837 iterators_t& ci = c->iterators; 1838 ci.y += 1; 1839 ci.ydrdy += c->shade.drdy; 1840 ci.ydgdy += c->shade.dgdy; 1841 ci.ydbdy += c->shade.dbdy; 1842 ci.ydady += c->shade.dady; 1843 ci.ydzdy += c->shade.dzdy; 1844 } 1845 1846 void step_y__w(context_t* c) 1847 { 1848 iterators_t& ci = c->iterators; 1849 ci.y += 1; 1850 ci.ydzdy += c->shade.dzdy; 1851 ci.ydwdy += c->shade.dwdy; 1852 } 1853 1854 void step_y__tmu(context_t* c) 1855 { 1856 iterators_t& ci = c->iterators; 1857 ci.y += 1; 1858 ci.ydzdy += c->shade.dzdy; 1859 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 1860 if (c->state.texture[i].enable) { 1861 texture_iterators_t& ti = c->state.texture[i].iterators; 1862 ti.ydsdy += ti.dsdy; 1863 ti.ydtdy += ti.dtdy; 1864 } 1865 } 1866 } 1867 1868 // ---------------------------------------------------------------------------- 1869 #if 0 1870 #pragma mark - 1871 #endif 1872 1873 void scanline_perspective(context_t* c) 1874 { 1875 struct { 1876 union { 1877 struct { 1878 int32_t s, sq; 1879 int32_t t, tq; 1880 }; 1881 struct { 1882 int32_t v, q; 1883 } st[2]; 1884 }; 1885 } tc[GGL_TEXTURE_UNIT_COUNT] __attribute__((aligned(16))); 1886 1887 // XXX: we should have a special case when dwdx = 0 1888 1889 // 32 pixels spans works okay. 16 is a lot better, 1890 // but hey, it's a software renderer... 1891 const uint32_t SPAN_BITS = 5; 1892 const uint32_t ys = c->iterators.y; 1893 const uint32_t xs = c->iterators.xl; 1894 const uint32_t x1 = c->iterators.xr; 1895 const uint32_t xc = x1 - xs; 1896 uint32_t remainder = xc & ((1<<SPAN_BITS)-1); 1897 uint32_t numSpans = xc >> SPAN_BITS; 1898 1899 const iterators_t& ci = c->iterators; 1900 int32_t w0 = (xs * c->shade.dwdx) + ci.ydwdy; 1901 int32_t q0 = gglRecipQ(w0, 30); 1902 const int iwscale = 32 - gglClz(q0); 1903 1904 const int32_t dwdx = c->shade.dwdx << SPAN_BITS; 1905 int32_t xl = c->iterators.xl; 1906 1907 // We process s & t with a loop to reduce the code size 1908 // (and i-cache pressure). 1909 1910 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 1911 const texture_t& tmu = c->state.texture[i]; 1912 if (!tmu.enable) continue; 1913 int32_t s = tmu.shade.is0 + 1914 (tmu.shade.idsdy * ys) + (tmu.shade.idsdx * xs) + 1915 ((tmu.shade.idsdx + tmu.shade.idsdy)>>1); 1916 int32_t t = tmu.shade.it0 + 1917 (tmu.shade.idtdy * ys) + (tmu.shade.idtdx * xs) + 1918 ((tmu.shade.idtdx + tmu.shade.idtdy)>>1); 1919 tc[i].s = s; 1920 tc[i].t = t; 1921 tc[i].sq = gglMulx(s, q0, iwscale); 1922 tc[i].tq = gglMulx(t, q0, iwscale); 1923 } 1924 1925 int32_t span = 0; 1926 do { 1927 int32_t w1; 1928 if (ggl_likely(numSpans)) { 1929 w1 = w0 + dwdx; 1930 } else { 1931 if (remainder) { 1932 // finish off the scanline... 1933 span = remainder; 1934 w1 = (c->shade.dwdx * span) + w0; 1935 } else { 1936 break; 1937 } 1938 } 1939 int32_t q1 = gglRecipQ(w1, 30); 1940 for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) { 1941 texture_t& tmu = c->state.texture[i]; 1942 if (!tmu.enable) continue; 1943 texture_iterators_t& ti = tmu.iterators; 1944 1945 for (int j=0 ; j<2 ; j++) { 1946 int32_t v = tc[i].st[j].v; 1947 if (span) v += (tmu.shade.st[j].dx)*span; 1948 else v += (tmu.shade.st[j].dx)<<SPAN_BITS; 1949 const int32_t v0 = tc[i].st[j].q; 1950 const int32_t v1 = gglMulx(v, q1, iwscale); 1951 int32_t dvdx = v1 - v0; 1952 if (span) dvdx /= span; 1953 else dvdx >>= SPAN_BITS; 1954 tc[i].st[j].v = v; 1955 tc[i].st[j].q = v1; 1956 1957 const int scale = ti.st[j].scale + (iwscale - 30); 1958 if (scale >= 0) { 1959 ti.st[j].ydvdy = v0 << scale; 1960 ti.st[j].dvdx = dvdx << scale; 1961 } else { 1962 ti.st[j].ydvdy = v0 >> -scale; 1963 ti.st[j].dvdx = dvdx >> -scale; 1964 } 1965 } 1966 generated_tex_vars_t& gen = c->generated_vars.texture[i]; 1967 gen.dsdx = ti.st[0].dvdx; 1968 gen.dtdx = ti.st[1].dvdx; 1969 } 1970 c->iterators.xl = xl; 1971 c->iterators.xr = xl = xl + (span ? span : (1<<SPAN_BITS)); 1972 w0 = w1; 1973 q0 = q1; 1974 c->span(c); 1975 } while(numSpans--); 1976 } 1977 1978 void scanline_perspective_single(context_t* c) 1979 { 1980 // 32 pixels spans works okay. 16 is a lot better, 1981 // but hey, it's a software renderer... 1982 const uint32_t SPAN_BITS = 5; 1983 const uint32_t ys = c->iterators.y; 1984 const uint32_t xs = c->iterators.xl; 1985 const uint32_t x1 = c->iterators.xr; 1986 const uint32_t xc = x1 - xs; 1987 1988 const iterators_t& ci = c->iterators; 1989 int32_t w = (xs * c->shade.dwdx) + ci.ydwdy; 1990 int32_t iw = gglRecipQ(w, 30); 1991 const int iwscale = 32 - gglClz(iw); 1992 1993 const int i = 31 - gglClz(c->state.enabled_tmu); 1994 generated_tex_vars_t& gen = c->generated_vars.texture[i]; 1995 texture_t& tmu = c->state.texture[i]; 1996 texture_iterators_t& ti = tmu.iterators; 1997 const int sscale = ti.sscale + (iwscale - 30); 1998 const int tscale = ti.tscale + (iwscale - 30); 1999 int32_t s = tmu.shade.is0 + 2000 (tmu.shade.idsdy * ys) + (tmu.shade.idsdx * xs) + 2001 ((tmu.shade.idsdx + tmu.shade.idsdy)>>1); 2002 int32_t t = tmu.shade.it0 + 2003 (tmu.shade.idtdy * ys) + (tmu.shade.idtdx * xs) + 2004 ((tmu.shade.idtdx + tmu.shade.idtdy)>>1); 2005 int32_t s0 = gglMulx(s, iw, iwscale); 2006 int32_t t0 = gglMulx(t, iw, iwscale); 2007 int32_t xl = c->iterators.xl; 2008 2009 int32_t sq, tq, dsdx, dtdx; 2010 int32_t premainder = xc & ((1<<SPAN_BITS)-1); 2011 uint32_t numSpans = xc >> SPAN_BITS; 2012 if (c->shade.dwdx == 0) { 2013 // XXX: we could choose to do this if the error is small enough 2014 numSpans = 0; 2015 premainder = xc; 2016 goto no_perspective; 2017 } 2018 2019 if (premainder) { 2020 w += c->shade.dwdx * premainder; 2021 iw = gglRecipQ(w, 30); 2022 no_perspective: 2023 s += tmu.shade.idsdx * premainder; 2024 t += tmu.shade.idtdx * premainder; 2025 sq = gglMulx(s, iw, iwscale); 2026 tq = gglMulx(t, iw, iwscale); 2027 dsdx = (sq - s0) / premainder; 2028 dtdx = (tq - t0) / premainder; 2029 c->iterators.xl = xl; 2030 c->iterators.xr = xl = xl + premainder; 2031 goto finish; 2032 } 2033 2034 while (numSpans--) { 2035 w += c->shade.dwdx << SPAN_BITS; 2036 s += tmu.shade.idsdx << SPAN_BITS; 2037 t += tmu.shade.idtdx << SPAN_BITS; 2038 iw = gglRecipQ(w, 30); 2039 sq = gglMulx(s, iw, iwscale); 2040 tq = gglMulx(t, iw, iwscale); 2041 dsdx = (sq - s0) >> SPAN_BITS; 2042 dtdx = (tq - t0) >> SPAN_BITS; 2043 c->iterators.xl = xl; 2044 c->iterators.xr = xl = xl + (1<<SPAN_BITS); 2045 finish: 2046 if (sscale >= 0) { 2047 ti.ydsdy = s0 << sscale; 2048 ti.dsdx = dsdx << sscale; 2049 } else { 2050 ti.ydsdy = s0 >>-sscale; 2051 ti.dsdx = dsdx >>-sscale; 2052 } 2053 if (tscale >= 0) { 2054 ti.ydtdy = t0 << tscale; 2055 ti.dtdx = dtdx << tscale; 2056 } else { 2057 ti.ydtdy = t0 >>-tscale; 2058 ti.dtdx = dtdx >>-tscale; 2059 } 2060 s0 = sq; 2061 t0 = tq; 2062 gen.dsdx = ti.dsdx; 2063 gen.dtdx = ti.dtdx; 2064 c->span(c); 2065 } 2066 } 2067 2068 // ---------------------------------------------------------------------------- 2069 2070 void scanline_col32cb16blend(context_t* c) 2071 { 2072 int32_t x = c->iterators.xl; 2073 size_t ct = c->iterators.xr - x; 2074 int32_t y = c->iterators.y; 2075 surface_t* cb = &(c->state.buffers.color); 2076 union { 2077 uint16_t* dst; 2078 uint32_t* dst32; 2079 }; 2080 dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y)); 2081 2082 #if ((ANDROID_CODEGEN >= ANDROID_CODEGEN_ASM) && defined(__arm__)) 2083 #if defined(__ARM_HAVE_NEON) && BYTE_ORDER == LITTLE_ENDIAN 2084 scanline_col32cb16blend_neon(dst, &(c->packed8888), ct); 2085 #else // defined(__ARM_HAVE_NEON) && BYTE_ORDER == LITTLE_ENDIAN 2086 scanline_col32cb16blend_arm(dst, GGL_RGBA_TO_HOST(c->packed8888), ct); 2087 #endif // defined(__ARM_HAVE_NEON) && BYTE_ORDER == LITTLE_ENDIAN 2088 #else 2089 uint32_t s = GGL_RGBA_TO_HOST(c->packed8888); 2090 int sA = (s>>24); 2091 int f = 0x100 - (sA + (sA>>7)); 2092 while (ct--) { 2093 uint16_t d = *dst; 2094 int dR = (d>>11)&0x1f; 2095 int dG = (d>>5)&0x3f; 2096 int dB = (d)&0x1f; 2097 int sR = (s >> ( 3))&0x1F; 2098 int sG = (s >> ( 8+2))&0x3F; 2099 int sB = (s >> (16+3))&0x1F; 2100 sR += (f*dR)>>8; 2101 sG += (f*dG)>>8; 2102 sB += (f*dB)>>8; 2103 *dst++ = uint16_t((sR<<11)|(sG<<5)|sB); 2104 } 2105 #endif 2106 2107 } 2108 2109 void scanline_t32cb16(context_t* c) 2110 { 2111 int32_t x = c->iterators.xl; 2112 size_t ct = c->iterators.xr - x; 2113 int32_t y = c->iterators.y; 2114 surface_t* cb = &(c->state.buffers.color); 2115 union { 2116 uint16_t* dst; 2117 uint32_t* dst32; 2118 }; 2119 dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y)); 2120 2121 surface_t* tex = &(c->state.texture[0].surface); 2122 const int32_t u = (c->state.texture[0].shade.is0>>16) + x; 2123 const int32_t v = (c->state.texture[0].shade.it0>>16) + y; 2124 uint32_t *src = reinterpret_cast<uint32_t*>(tex->data)+(u+(tex->stride*v)); 2125 int sR, sG, sB; 2126 uint32_t s, d; 2127 2128 if (ct==1 || uint32_t(dst)&2) { 2129 last_one: 2130 s = GGL_RGBA_TO_HOST( *src++ ); 2131 *dst++ = convertAbgr8888ToRgb565(s); 2132 ct--; 2133 } 2134 2135 while (ct >= 2) { 2136 #if BYTE_ORDER == BIG_ENDIAN 2137 s = GGL_RGBA_TO_HOST( *src++ ); 2138 d = convertAbgr8888ToRgb565_hi16(s); 2139 2140 s = GGL_RGBA_TO_HOST( *src++ ); 2141 d |= convertAbgr8888ToRgb565(s); 2142 #else 2143 s = GGL_RGBA_TO_HOST( *src++ ); 2144 d = convertAbgr8888ToRgb565(s); 2145 2146 s = GGL_RGBA_TO_HOST( *src++ ); 2147 d |= convertAbgr8888ToRgb565(s) << 16; 2148 #endif 2149 *dst32++ = d; 2150 ct -= 2; 2151 } 2152 2153 if (ct > 0) { 2154 goto last_one; 2155 } 2156 } 2157 2158 void scanline_t32cb16blend(context_t* c) 2159 { 2160 #if ((ANDROID_CODEGEN >= ANDROID_CODEGEN_ASM) && (defined(__arm__) || defined(__mips))) 2161 int32_t x = c->iterators.xl; 2162 size_t ct = c->iterators.xr - x; 2163 int32_t y = c->iterators.y; 2164 surface_t* cb = &(c->state.buffers.color); 2165 uint16_t* dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y)); 2166 2167 surface_t* tex = &(c->state.texture[0].surface); 2168 const int32_t u = (c->state.texture[0].shade.is0>>16) + x; 2169 const int32_t v = (c->state.texture[0].shade.it0>>16) + y; 2170 uint32_t *src = reinterpret_cast<uint32_t*>(tex->data)+(u+(tex->stride*v)); 2171 2172 #ifdef __arm__ 2173 scanline_t32cb16blend_arm(dst, src, ct); 2174 #else 2175 scanline_t32cb16blend_mips(dst, src, ct); 2176 #endif 2177 #else 2178 dst_iterator16 di(c); 2179 horz_iterator32 hi(c); 2180 blender_32to16 bl(c); 2181 while (di.count--) { 2182 uint32_t s = hi.get_pixel32(); 2183 bl.write(s, di.dst); 2184 di.dst++; 2185 } 2186 #endif 2187 } 2188 2189 void scanline_t32cb16blend_srca(context_t* c) 2190 { 2191 dst_iterator16 di(c); 2192 horz_iterator32 hi(c); 2193 blender_32to16_srcA blender(c); 2194 2195 while (di.count--) { 2196 uint32_t s = hi.get_pixel32(); 2197 blender.write(s,di.dst); 2198 di.dst++; 2199 } 2200 } 2201 2202 void scanline_t16cb16blend_clamp_mod(context_t* c) 2203 { 2204 const int a = c->iterators.ydady >> (GGL_COLOR_BITS-8); 2205 if (a == 0) { 2206 return; 2207 } 2208 2209 if (a == 255) { 2210 scanline_t16cb16_clamp(c); 2211 return; 2212 } 2213 2214 dst_iterator16 di(c); 2215 blender_16to16_modulate blender(c); 2216 clamp_iterator ci(c); 2217 2218 while (di.count--) { 2219 uint16_t s = ci.get_pixel16(); 2220 blender.write(s, di.dst); 2221 di.dst++; 2222 } 2223 } 2224 2225 void scanline_memcpy(context_t* c) 2226 { 2227 int32_t x = c->iterators.xl; 2228 size_t ct = c->iterators.xr - x; 2229 int32_t y = c->iterators.y; 2230 surface_t* cb = &(c->state.buffers.color); 2231 const GGLFormat* fp = &(c->formats[cb->format]); 2232 uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) + 2233 (x + (cb->stride * y)) * fp->size; 2234 2235 surface_t* tex = &(c->state.texture[0].surface); 2236 const int32_t u = (c->state.texture[0].shade.is0>>16) + x; 2237 const int32_t v = (c->state.texture[0].shade.it0>>16) + y; 2238 uint8_t *src = reinterpret_cast<uint8_t*>(tex->data) + 2239 (u + (tex->stride * v)) * fp->size; 2240 2241 const size_t size = ct * fp->size; 2242 memcpy(dst, src, size); 2243 } 2244 2245 void scanline_memset8(context_t* c) 2246 { 2247 int32_t x = c->iterators.xl; 2248 size_t ct = c->iterators.xr - x; 2249 int32_t y = c->iterators.y; 2250 surface_t* cb = &(c->state.buffers.color); 2251 uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) + (x+(cb->stride*y)); 2252 uint32_t packed = c->packed; 2253 memset(dst, packed, ct); 2254 } 2255 2256 void scanline_memset16(context_t* c) 2257 { 2258 int32_t x = c->iterators.xl; 2259 size_t ct = c->iterators.xr - x; 2260 int32_t y = c->iterators.y; 2261 surface_t* cb = &(c->state.buffers.color); 2262 uint16_t* dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y)); 2263 uint32_t packed = c->packed; 2264 android_memset16(dst, packed, ct*2); 2265 } 2266 2267 void scanline_memset32(context_t* c) 2268 { 2269 int32_t x = c->iterators.xl; 2270 size_t ct = c->iterators.xr - x; 2271 int32_t y = c->iterators.y; 2272 surface_t* cb = &(c->state.buffers.color); 2273 uint32_t* dst = reinterpret_cast<uint32_t*>(cb->data) + (x+(cb->stride*y)); 2274 uint32_t packed = GGL_HOST_TO_RGBA(c->packed); 2275 android_memset32(dst, packed, ct*4); 2276 } 2277 2278 void scanline_clear(context_t* c) 2279 { 2280 int32_t x = c->iterators.xl; 2281 size_t ct = c->iterators.xr - x; 2282 int32_t y = c->iterators.y; 2283 surface_t* cb = &(c->state.buffers.color); 2284 const GGLFormat* fp = &(c->formats[cb->format]); 2285 uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) + 2286 (x + (cb->stride * y)) * fp->size; 2287 const size_t size = ct * fp->size; 2288 memset(dst, 0, size); 2289 } 2290 2291 void scanline_set(context_t* c) 2292 { 2293 int32_t x = c->iterators.xl; 2294 size_t ct = c->iterators.xr - x; 2295 int32_t y = c->iterators.y; 2296 surface_t* cb = &(c->state.buffers.color); 2297 const GGLFormat* fp = &(c->formats[cb->format]); 2298 uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) + 2299 (x + (cb->stride * y)) * fp->size; 2300 const size_t size = ct * fp->size; 2301 memset(dst, 0xFF, size); 2302 } 2303 2304 void scanline_noop(context_t* c) 2305 { 2306 } 2307 2308 void rect_generic(context_t* c, size_t yc) 2309 { 2310 do { 2311 c->scanline(c); 2312 c->step_y(c); 2313 } while (--yc); 2314 } 2315 2316 void rect_memcpy(context_t* c, size_t yc) 2317 { 2318 int32_t x = c->iterators.xl; 2319 size_t ct = c->iterators.xr - x; 2320 int32_t y = c->iterators.y; 2321 surface_t* cb = &(c->state.buffers.color); 2322 const GGLFormat* fp = &(c->formats[cb->format]); 2323 uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) + 2324 (x + (cb->stride * y)) * fp->size; 2325 2326 surface_t* tex = &(c->state.texture[0].surface); 2327 const int32_t u = (c->state.texture[0].shade.is0>>16) + x; 2328 const int32_t v = (c->state.texture[0].shade.it0>>16) + y; 2329 uint8_t *src = reinterpret_cast<uint8_t*>(tex->data) + 2330 (u + (tex->stride * v)) * fp->size; 2331 2332 if (cb->stride == tex->stride && ct == size_t(cb->stride)) { 2333 memcpy(dst, src, ct * fp->size * yc); 2334 } else { 2335 const size_t size = ct * fp->size; 2336 const size_t dbpr = cb->stride * fp->size; 2337 const size_t sbpr = tex->stride * fp->size; 2338 do { 2339 memcpy(dst, src, size); 2340 dst += dbpr; 2341 src += sbpr; 2342 } while (--yc); 2343 } 2344 } 2345 // ---------------------------------------------------------------------------- 2346 }; // namespace android 2347 2348
