1 /* 2 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer in the documentation and/or other materials provided 12 * with the distribution. 13 * * Neither the name of The Linux Foundation nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef OVERLAY_UTILS_H 31 #define OVERLAY_UTILS_H 32 33 #include <cutils/log.h> // ALOGE, etc 34 #include <errno.h> 35 #include <fcntl.h> // open, O_RDWR, etc 36 #include <hardware/hardware.h> 37 #include <hardware/gralloc.h> // buffer_handle_t 38 #include <linux/msm_mdp.h> // flags 39 #include <linux/msm_rotator.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sys/stat.h> 44 #include <sys/types.h> 45 #include <utils/Log.h> 46 #include "gralloc_priv.h" //for interlace 47 48 // Older platforms do not support Venus 49 #ifndef VENUS_COLOR_FORMAT 50 #define MDP_Y_CBCR_H2V2_VENUS MDP_IMGTYPE_LIMIT 51 #endif 52 53 /* 54 * 55 * Collection of utilities functions/structs/enums etc... 56 * 57 * */ 58 59 // comment that out if you want to remove asserts 60 // or put it as -D in Android.mk. your choice. 61 #define OVERLAY_HAS_ASSERT 62 63 #ifdef OVERLAY_HAS_ASSERT 64 # define OVASSERT(x, ...) if(!(x)) { ALOGE(__VA_ARGS__); abort(); } 65 #else 66 # define OVASSERT(x, ...) ALOGE_IF(!(x), __VA_ARGS__) 67 #endif // OVERLAY_HAS_ASSERT 68 69 #define DEBUG_OVERLAY 0 70 #define PROFILE_OVERLAY 0 71 72 #ifndef MDSS_MDP_RIGHT_MIXER 73 #define MDSS_MDP_RIGHT_MIXER 0x100 74 #endif 75 76 #ifndef MDP_OV_PIPE_FORCE_DMA 77 #define MDP_OV_PIPE_FORCE_DMA 0x4000 78 #endif 79 80 #ifndef MDSS_MDP_DUAL_PIPE 81 #define MDSS_MDP_DUAL_PIPE 0x200 82 #endif 83 84 #define FB_DEVICE_TEMPLATE "/dev/graphics/fb%u" 85 86 namespace overlay { 87 88 // fwd 89 class Overlay; 90 class OvFD; 91 92 /* helper function to open by using fbnum */ 93 bool open(OvFD& fd, uint32_t fbnum, const char* const dev, 94 int flags = O_RDWR); 95 96 namespace utils { 97 struct Whf; 98 struct Dim; 99 100 inline uint32_t setBit(uint32_t x, uint32_t mask) { 101 return (x | mask); 102 } 103 104 inline uint32_t clrBit(uint32_t x, uint32_t mask) { 105 return (x & ~mask); 106 } 107 108 /* Utility class to help avoid copying instances by making the copy ctor 109 * and assignment operator private 110 * 111 * Usage: 112 * class SomeClass : utils::NoCopy {...}; 113 */ 114 class NoCopy { 115 protected: 116 NoCopy(){} 117 ~NoCopy() {} 118 private: 119 NoCopy(const NoCopy&); 120 const NoCopy& operator=(const NoCopy&); 121 }; 122 123 bool isMdssRotator(); 124 void normalizeCrop(uint32_t& xy, uint32_t& wh); 125 126 template <class Type> 127 void swapWidthHeight(Type& width, Type& height); 128 129 struct Dim { 130 Dim () : x(0), y(0), 131 w(0), h(0), 132 o(0) {} 133 Dim(uint32_t _x, uint32_t _y, uint32_t _w, uint32_t _h) : 134 x(_x), y(_y), 135 w(_w), h(_h) {} 136 Dim(uint32_t _x, uint32_t _y, uint32_t _w, uint32_t _h, uint32_t _o) : 137 x(_x), y(_y), 138 w(_w), h(_h), 139 o(_o) {} 140 bool check(uint32_t _w, uint32_t _h) const { 141 return (x+w <= _w && y+h <= _h); 142 143 } 144 145 bool operator==(const Dim& d) const { 146 return d.x == x && d.y == y && 147 d.w == w && d.h == h && 148 d.o == o; 149 } 150 151 bool operator!=(const Dim& d) const { 152 return !operator==(d); 153 } 154 155 void dump() const; 156 uint32_t x; 157 uint32_t y; 158 uint32_t w; 159 uint32_t h; 160 uint32_t o; 161 }; 162 163 // TODO have Whfz 164 165 struct Whf { 166 Whf() : w(0), h(0), format(0), size(0) {} 167 Whf(uint32_t wi, uint32_t he, uint32_t f) : 168 w(wi), h(he), format(f), size(0) {} 169 Whf(uint32_t wi, uint32_t he, uint32_t f, uint32_t s) : 170 w(wi), h(he), format(f), size(s) {} 171 // FIXME not comparing size at the moment 172 bool operator==(const Whf& whf) const { 173 return whf.w == w && whf.h == h && 174 whf.format == format; 175 } 176 bool operator!=(const Whf& whf) const { 177 return !operator==(whf); 178 } 179 void dump() const; 180 uint32_t w; 181 uint32_t h; 182 uint32_t format; 183 uint32_t size; 184 }; 185 186 enum { MAX_PATH_LEN = 256 }; 187 188 enum { DEFAULT_PLANE_ALPHA = 0xFF }; 189 190 /** 191 * Rotator flags: not to be confused with orientation flags. 192 * Usually, you want to open the rotator to make sure it is 193 * ready for business. 194 * */ 195 enum eRotFlags { 196 ROT_FLAGS_NONE = 0, 197 //Use rotator for 0 rotation. It is used anyway for others. 198 ROT_0_ENABLED = 1 << 0, 199 //Enable rotator downscale optimization for hardware bugs not handled in 200 //driver. If downscale optimizatation is required, 201 //then rotator will be used even if its 0 rotation case. 202 ROT_DOWNSCALE_ENABLED = 1 << 1, 203 ROT_PREROTATED = 1 << 2, 204 }; 205 206 enum eRotDownscale { 207 ROT_DS_NONE = 0, 208 ROT_DS_HALF = 1, 209 ROT_DS_FOURTH = 2, 210 ROT_DS_EIGHTH = 3, 211 }; 212 213 /* 214 * Various mdp flags like PIPE SHARE, DEINTERLACE etc... 215 * kernel/common/linux/msm_mdp.h 216 * INTERLACE_MASK: hardware/qcom/display/libgralloc/badger/fb_priv.h 217 * */ 218 enum eMdpFlags { 219 OV_MDP_FLAGS_NONE = 0, 220 OV_MDP_PIPE_SHARE = MDP_OV_PIPE_SHARE, 221 OV_MDP_PIPE_FORCE_DMA = MDP_OV_PIPE_FORCE_DMA, 222 OV_MDP_DEINTERLACE = MDP_DEINTERLACE, 223 OV_MDP_SECURE_OVERLAY_SESSION = MDP_SECURE_OVERLAY_SESSION, 224 OV_MDP_SECURE_DISPLAY_OVERLAY_SESSION = MDP_SECURE_DISPLAY_OVERLAY_SESSION, 225 OV_MDP_SOURCE_ROTATED_90 = MDP_SOURCE_ROTATED_90, 226 OV_MDP_BACKEND_COMPOSITION = MDP_BACKEND_COMPOSITION, 227 OV_MDP_BLEND_FG_PREMULT = MDP_BLEND_FG_PREMULT, 228 OV_MDP_FLIP_H = MDP_FLIP_LR, 229 OV_MDP_FLIP_V = MDP_FLIP_UD, 230 OV_MDSS_MDP_RIGHT_MIXER = MDSS_MDP_RIGHT_MIXER, 231 OV_MDP_PP_EN = MDP_OVERLAY_PP_CFG_EN, 232 OV_MDSS_MDP_BWC_EN = MDP_BWC_EN, 233 OV_MDSS_MDP_DUAL_PIPE = MDSS_MDP_DUAL_PIPE, 234 OV_MDP_SOLID_FILL = MDP_SOLID_FILL, 235 }; 236 237 enum eZorder { 238 ZORDER_0 = 0, 239 ZORDER_1, 240 ZORDER_2, 241 ZORDER_3, 242 Z_SYSTEM_ALLOC = 0xFFFF 243 }; 244 245 enum eMdpPipeType { 246 OV_MDP_PIPE_RGB = 0, 247 OV_MDP_PIPE_VG, 248 OV_MDP_PIPE_DMA, 249 OV_MDP_PIPE_ANY, //Any 250 }; 251 252 // Identify destination pipes 253 // TODO Names useless, replace with int and change all interfaces 254 enum eDest { 255 OV_P0 = 0, 256 OV_P1, 257 OV_P2, 258 OV_P3, 259 OV_P4, 260 OV_P5, 261 OV_P6, 262 OV_P7, 263 OV_P8, 264 OV_P9, 265 OV_INVALID, 266 OV_MAX = OV_INVALID, 267 }; 268 269 /* Used when a buffer is split over 2 pipes and sent to display */ 270 enum { 271 OV_LEFT_SPLIT = 0, 272 OV_RIGHT_SPLIT, 273 }; 274 275 /* values for copybit_set_parameter(OVERLAY_TRANSFORM) */ 276 enum eTransform { 277 /* No rot */ 278 OVERLAY_TRANSFORM_0 = 0x0, 279 /* flip source image horizontally 0x1 */ 280 OVERLAY_TRANSFORM_FLIP_H = HAL_TRANSFORM_FLIP_H, 281 /* flip source image vertically 0x2 */ 282 OVERLAY_TRANSFORM_FLIP_V = HAL_TRANSFORM_FLIP_V, 283 /* rotate source image 180 degrees 284 * It is basically bit-or-ed H | V == 0x3 */ 285 OVERLAY_TRANSFORM_ROT_180 = HAL_TRANSFORM_ROT_180, 286 /* rotate source image 90 degrees 0x4 */ 287 OVERLAY_TRANSFORM_ROT_90 = HAL_TRANSFORM_ROT_90, 288 /* rotate source image 90 degrees and flip horizontally 0x5 */ 289 OVERLAY_TRANSFORM_ROT_90_FLIP_H = HAL_TRANSFORM_ROT_90 | 290 HAL_TRANSFORM_FLIP_H, 291 /* rotate source image 90 degrees and flip vertically 0x6 */ 292 OVERLAY_TRANSFORM_ROT_90_FLIP_V = HAL_TRANSFORM_ROT_90 | 293 HAL_TRANSFORM_FLIP_V, 294 /* rotate source image 270 degrees 295 * Basically 180 | 90 == 0x7 */ 296 OVERLAY_TRANSFORM_ROT_270 = HAL_TRANSFORM_ROT_270, 297 /* rotate invalid like in Transform.h */ 298 OVERLAY_TRANSFORM_INV = 0x80 299 }; 300 301 enum eBlending { 302 OVERLAY_BLENDING_UNDEFINED = 0x0, 303 /* No blending */ 304 OVERLAY_BLENDING_OPAQUE, 305 /* src.rgb + dst.rgb*(1-src_alpha) */ 306 OVERLAY_BLENDING_PREMULT, 307 /* src.rgb * src_alpha + dst.rgb (1 - src_alpha) */ 308 OVERLAY_BLENDING_COVERAGE, 309 }; 310 311 // Used to consolidate pipe params 312 struct PipeArgs { 313 PipeArgs() : mdpFlags(OV_MDP_FLAGS_NONE), 314 zorder(Z_SYSTEM_ALLOC), 315 rotFlags(ROT_FLAGS_NONE), 316 planeAlpha(DEFAULT_PLANE_ALPHA), 317 blending(OVERLAY_BLENDING_COVERAGE){ 318 } 319 320 PipeArgs(eMdpFlags f, Whf _whf, 321 eZorder z, eRotFlags r, 322 int pA = DEFAULT_PLANE_ALPHA, eBlending b = OVERLAY_BLENDING_COVERAGE) : 323 mdpFlags(f), 324 whf(_whf), 325 zorder(z), 326 rotFlags(r), 327 planeAlpha(pA), 328 blending(b){ 329 } 330 331 eMdpFlags mdpFlags; // for mdp_overlay flags 332 Whf whf; 333 eZorder zorder; // stage number 334 eRotFlags rotFlags; 335 int planeAlpha; 336 eBlending blending; 337 }; 338 339 // Cannot use HW_OVERLAY_MAGNIFICATION_LIMIT, since at the time 340 // of integration, HW_OVERLAY_MAGNIFICATION_LIMIT was a define 341 enum { HW_OV_MAGNIFICATION_LIMIT = 20, 342 HW_OV_MINIFICATION_LIMIT = 8 343 }; 344 345 inline void setMdpFlags(eMdpFlags& f, eMdpFlags v) { 346 f = static_cast<eMdpFlags>(setBit(f, v)); 347 } 348 349 inline void clearMdpFlags(eMdpFlags& f, eMdpFlags v) { 350 f = static_cast<eMdpFlags>(clrBit(f, v)); 351 } 352 353 enum { FB0, FB1, FB2 }; 354 355 struct ScreenInfo { 356 ScreenInfo() : mFBWidth(0), 357 mFBHeight(0), 358 mFBbpp(0), 359 mFBystride(0) {} 360 void dump(const char* const s) const; 361 uint32_t mFBWidth; 362 uint32_t mFBHeight; 363 uint32_t mFBbpp; 364 uint32_t mFBystride; 365 }; 366 367 int getMdpFormat(int format); 368 int getMdpFormat(int format, bool tileEnabled); 369 int getHALFormat(int mdpFormat); 370 void getDecimationFactor(const int& src_w, const int& src_h, 371 const int& dst_w, const int& dst_h, uint8_t& horzDeci, 372 uint8_t& vertDeci); 373 374 /* flip is upside down and such. V, H flip 375 * rotation is 90, 180 etc 376 * It returns MDP related enum/define that match rot+flip*/ 377 int getMdpOrient(eTransform rotation); 378 const char* getFormatString(int format); 379 380 template <class T> 381 inline void memset0(T& t) { ::memset(&t, 0, sizeof(t)); } 382 383 template <class T> inline void swap ( T& a, T& b ) 384 { 385 T c(a); a=b; b=c; 386 } 387 388 template<typename T> inline T max(T a, T b) { return (a > b) ? a : b; } 389 390 template<typename T> inline T min(T a, T b) { return (a < b) ? a : b; } 391 392 inline int alignup(int value, int a) { 393 //if align = 0, return the value. Else, do alignment. 394 return a ? ((((value - 1) / a) + 1) * a) : value; 395 } 396 397 inline int aligndown(int value, int a) { 398 //if align = 0, return the value. Else, do alignment. 399 return a ? ((value) & ~(a-1)) : value; 400 } 401 402 // FIXME that align should replace the upper one. 403 inline int align(int value, int a) { 404 //if align = 0, return the value. Else, do alignment. 405 return a ? ((value + (a-1)) & ~(a-1)) : value; 406 } 407 408 inline bool isYuv(uint32_t format) { 409 switch(format){ 410 case MDP_Y_CBCR_H2V1: 411 case MDP_Y_CBCR_H2V2: 412 case MDP_Y_CRCB_H2V2: 413 case MDP_Y_CRCB_H1V1: 414 case MDP_Y_CRCB_H2V1: 415 case MDP_Y_CRCB_H2V2_TILE: 416 case MDP_Y_CBCR_H2V2_TILE: 417 case MDP_Y_CR_CB_H2V2: 418 case MDP_Y_CR_CB_GH2V2: 419 case MDP_Y_CBCR_H2V2_VENUS: 420 case MDP_YCBYCR_H2V1: 421 case MDP_YCRYCB_H2V1: 422 return true; 423 default: 424 return false; 425 } 426 return false; 427 } 428 429 inline bool isRgb(uint32_t format) { 430 switch(format) { 431 case MDP_RGBA_8888: 432 case MDP_BGRA_8888: 433 case MDP_RGBX_8888: 434 case MDP_RGB_565: 435 return true; 436 default: 437 return false; 438 } 439 return false; 440 } 441 442 inline const char* getFormatString(int format){ 443 #define STR(f) #f; 444 static const char* formats[MDP_IMGTYPE_LIMIT + 1] = {0}; 445 formats[MDP_RGB_565] = STR(MDP_RGB_565); 446 formats[MDP_XRGB_8888] = STR(MDP_XRGB_8888); 447 formats[MDP_Y_CBCR_H2V2] = STR(MDP_Y_CBCR_H2V2); 448 formats[MDP_Y_CBCR_H2V2_ADRENO] = STR(MDP_Y_CBCR_H2V2_ADRENO); 449 formats[MDP_ARGB_8888] = STR(MDP_ARGB_8888); 450 formats[MDP_RGB_888] = STR(MDP_RGB_888); 451 formats[MDP_Y_CRCB_H2V2] = STR(MDP_Y_CRCB_H2V2); 452 formats[MDP_YCBYCR_H2V1] = STR(MDP_YCBYCR_H2V1); 453 formats[MDP_YCRYCB_H2V1] = STR(MDP_YCRYCB_H2V1); 454 formats[MDP_CBYCRY_H2V1] = STR(MDP_CBYCRY_H2V1); 455 formats[MDP_Y_CRCB_H2V1] = STR(MDP_Y_CRCB_H2V1); 456 formats[MDP_Y_CBCR_H2V1] = STR(MDP_Y_CBCR_H2V1); 457 formats[MDP_Y_CRCB_H1V2] = STR(MDP_Y_CRCB_H1V2); 458 formats[MDP_Y_CBCR_H1V2] = STR(MDP_Y_CBCR_H1V2); 459 formats[MDP_RGBA_8888] = STR(MDP_RGBA_8888); 460 formats[MDP_BGRA_8888] = STR(MDP_BGRA_8888); 461 formats[MDP_RGBX_8888] = STR(MDP_RGBX_8888); 462 formats[MDP_Y_CRCB_H2V2_TILE] = STR(MDP_Y_CRCB_H2V2_TILE); 463 formats[MDP_Y_CBCR_H2V2_TILE] = STR(MDP_Y_CBCR_H2V2_TILE); 464 formats[MDP_Y_CR_CB_H2V2] = STR(MDP_Y_CR_CB_H2V2); 465 formats[MDP_Y_CR_CB_GH2V2] = STR(MDP_Y_CR_CB_GH2V2); 466 formats[MDP_Y_CB_CR_H2V2] = STR(MDP_Y_CB_CR_H2V2); 467 formats[MDP_Y_CRCB_H1V1] = STR(MDP_Y_CRCB_H1V1); 468 formats[MDP_Y_CBCR_H1V1] = STR(MDP_Y_CBCR_H1V1); 469 formats[MDP_YCRCB_H1V1] = STR(MDP_YCRCB_H1V1); 470 formats[MDP_YCBCR_H1V1] = STR(MDP_YCBCR_H1V1); 471 formats[MDP_BGR_565] = STR(MDP_BGR_565); 472 formats[MDP_BGR_888] = STR(MDP_BGR_888); 473 formats[MDP_Y_CBCR_H2V2_VENUS] = STR(MDP_Y_CBCR_H2V2_VENUS); 474 formats[MDP_BGRX_8888] = STR(MDP_BGRX_8888); 475 formats[MDP_RGBA_8888_TILE] = STR(MDP_RGBA_8888_TILE); 476 formats[MDP_ARGB_8888_TILE] = STR(MDP_ARGB_8888_TILE); 477 formats[MDP_ABGR_8888_TILE] = STR(MDP_ABGR_8888_TILE); 478 formats[MDP_BGRA_8888_TILE] = STR(MDP_BGRA_8888_TILE); 479 formats[MDP_RGBX_8888_TILE] = STR(MDP_RGBX_8888_TILE); 480 formats[MDP_XRGB_8888_TILE] = STR(MDP_XRGB_8888_TILE); 481 formats[MDP_XBGR_8888_TILE] = STR(MDP_XBGR_8888_TILE); 482 formats[MDP_BGRX_8888_TILE] = STR(MDP_BGRX_8888_TILE); 483 formats[MDP_RGB_565_TILE] = STR(MDP_RGB_565_TILE); 484 formats[MDP_IMGTYPE_LIMIT] = STR(MDP_IMGTYPE_LIMIT); 485 486 if(format < 0 || format >= MDP_IMGTYPE_LIMIT) { 487 ALOGE("%s wrong fmt %d", __FUNCTION__, format); 488 return "Unsupported format"; 489 } 490 if(formats[format] == 0) { 491 ALOGE("%s: table missing format %d from header", __FUNCTION__, format); 492 return ""; 493 } 494 return formats[format]; 495 } 496 497 inline void Whf::dump() const { 498 ALOGE("== Dump WHF w=%d h=%d f=%d s=%d start/end ==", 499 w, h, format, size); 500 } 501 502 inline void Dim::dump() const { 503 ALOGE("== Dump Dim x=%d y=%d w=%d h=%d start/end ==", x, y, w, h); 504 } 505 506 template <class Type> 507 void swapWidthHeight(Type& width, Type& height) { 508 Type tmp = width; 509 width = height; 510 height = tmp; 511 } 512 513 inline void ScreenInfo::dump(const char* const s) const { 514 ALOGE("== Dump %s ScreenInfo w=%d h=%d" 515 " bpp=%d stride=%d start/end ==", 516 s, mFBWidth, mFBHeight, mFBbpp, mFBystride); 517 } 518 519 inline bool openDev(OvFD& fd, int fbnum, 520 const char* const devpath, int flags) { 521 return overlay::open(fd, fbnum, devpath, flags); 522 } 523 524 template <class T> 525 inline void even_ceil(T& value) { 526 if(value & 1) 527 value++; 528 } 529 530 template <class T> 531 inline void even_floor(T& value) { 532 if(value & 1) 533 value--; 534 } 535 536 /* Prerotation adjusts crop co-ordinates to the new transformed values within 537 * destination buffer. This is necessary only when the entire buffer is rotated 538 * irrespective of crop (A-family). If only the crop portion of the buffer is 539 * rotated into a destination buffer matching the size of crop, we don't need to 540 * use this helper (B-family). 541 * @Deprecated as of now, retained for the case where a full buffer needs 542 * transform and also as a reference. 543 */ 544 void preRotateSource(const eTransform& tr, Whf& whf, Dim& srcCrop); 545 void getDump(char *buf, size_t len, const char *prefix, const mdp_overlay& ov); 546 void getDump(char *buf, size_t len, const char *prefix, const msmfb_img& ov); 547 void getDump(char *buf, size_t len, const char *prefix, const mdp_rect& ov); 548 void getDump(char *buf, size_t len, const char *prefix, 549 const msmfb_overlay_data& ov); 550 void getDump(char *buf, size_t len, const char *prefix, const msmfb_data& ov); 551 void getDump(char *buf, size_t len, const char *prefix, 552 const msm_rotator_img_info& ov); 553 void getDump(char *buf, size_t len, const char *prefix, 554 const msm_rotator_data_info& ov); 555 556 } // namespace utils ends 557 558 //--------------------Class Res stuff (namespace overlay only) ----------- 559 560 class Res { 561 public: 562 // /dev/graphics/fb%u 563 static const char* const fbPath; 564 // /dev/msm_rotator 565 static const char* const rotPath; 566 }; 567 568 569 //--------------------Class OvFD stuff (namespace overlay only) ----------- 570 571 /* 572 * Holds one FD 573 * Dtor will NOT close the underlying FD. 574 * That enables us to copy that object around 575 * */ 576 class OvFD { 577 public: 578 /* Ctor */ 579 explicit OvFD(); 580 581 /* dtor will NOT close the underlying FD */ 582 ~OvFD(); 583 584 /* Open fd using the path given by dev. 585 * return false in failure */ 586 bool open(const char* const dev, 587 int flags = O_RDWR); 588 589 /* populate path */ 590 void setPath(const char* const dev); 591 592 /* Close fd if we have a valid fd. */ 593 bool close(); 594 595 /* returns underlying fd.*/ 596 int getFD() const; 597 598 /* returns true if fd is valid */ 599 bool valid() const; 600 601 /* like operator= */ 602 void copy(int fd); 603 604 /* dump the state of the instance */ 605 void dump() const; 606 private: 607 /* helper enum for determine valid/invalid fd */ 608 enum { INVAL = -1 }; 609 610 /* actual os fd */ 611 int mFD; 612 613 /* path, for debugging */ 614 char mPath[utils::MAX_PATH_LEN]; 615 }; 616 617 //-------------------Inlines-------------------------- 618 619 inline bool open(OvFD& fd, uint32_t fbnum, const char* const dev, int flags) 620 { 621 char dev_name[64] = {0}; 622 snprintf(dev_name, sizeof(dev_name), dev, fbnum); 623 return fd.open(dev_name, flags); 624 } 625 626 inline OvFD::OvFD() : mFD (INVAL) { 627 mPath[0] = 0; 628 } 629 630 inline OvFD::~OvFD() { 631 //no op since copy() can be used to share fd, in 3d cases. 632 } 633 634 inline bool OvFD::open(const char* const dev, int flags) 635 { 636 mFD = ::open(dev, flags, 0); 637 if (mFD < 0) { 638 // FIXME errno, strerror in bionic? 639 ALOGE("Cant open device %s err=%d", dev, errno); 640 return false; 641 } 642 setPath(dev); 643 return true; 644 } 645 646 inline void OvFD::setPath(const char* const dev) 647 { 648 ::strlcpy(mPath, dev, sizeof(mPath)); 649 } 650 651 inline bool OvFD::close() 652 { 653 int ret = 0; 654 if(valid()) { 655 ret = ::close(mFD); 656 mFD = INVAL; 657 } 658 return (ret == 0); 659 } 660 661 inline bool OvFD::valid() const 662 { 663 return (mFD != INVAL); 664 } 665 666 inline int OvFD::getFD() const { return mFD; } 667 668 inline void OvFD::copy(int fd) { 669 mFD = fd; 670 } 671 672 inline void OvFD::dump() const 673 { 674 ALOGE("== Dump OvFD fd=%d path=%s start/end ==", 675 mFD, mPath); 676 } 677 678 //--------------- class OvFD stuff ends --------------------- 679 680 } // overlay 681 682 683 #endif // OVERLAY_UTILS_H 684
