src/core/render.cpp

   1 #include "lsnes.hpp"
   2 #include <snes/snes.hpp>
   3
   4 #include "core/misc.hpp"
   5 #include "core/png.hpp"
   6 #include "core/render.hpp"
   7
   8 #include <sstream>
   9 #include <list>
  10 #include <iomanip>
  11 #include <cstdint>
  12 #include <string>
  13 #include <map>
  14 #include <vector>
  15
  16 #define TAG_ZEROWIDTH 0
  17 #define TAG_NARROW 1
  18 #define TAG_WIDE 2
  19 #define TAG_TABULATION 3
  20 #define TAG_WIDTH_MASK 3
  21 #define TAG_LINECHANGE 4
  22
  23 extern const char* font_hex_data;
  24
  25 namespace
  26 {
  27         std::vector<uint32_t> font_glyph_data;
  28         std::map<uint32_t, uint32_t> font_glyph_offsets;
  29
  30         uint32_t parse_word(const char* x)
  31         {
  32                 char buf[9] = {0};
  33                 char* end;
  34                 memcpy(buf, x, 8);
  35                 unsigned long v = strtoul(buf, &end, 16);
  36                 if(end != buf + 8)
  37                         v = 0xFFFFFFFFUL;
  38                 //std::cerr << "Parse word " << buf << std::endl;
  39                 return v;
  40         }
  41
  42         void init_font()
  43         {
  44                 static bool iflag = false;
  45                 if(iflag)
  46                         return;
  47                 //Special glyph data.
  48                 font_glyph_data.resize(7);
  49                 //Space & Unknown.
  50                 font_glyph_data[0] = TAG_NARROW;
  51                 font_glyph_data[1] = 0;
  52                 font_glyph_data[2] = 0;
  53                 font_glyph_data[3] = 0;
  54                 font_glyph_data[4] = 0;
  55                 //Tabulation.
  56                 font_glyph_data[5] = TAG_TABULATION;
  57                 //Linefeed.
  58                 font_glyph_data[6] = TAG_ZEROWIDTH | TAG_LINECHANGE;
  59
  60                 size_t lsptr = 0;
  61                 uint32_t lc = 1;
  62                 for(size_t i = 0;; i++) {
  63                         //Skip spaces.
  64                         switch(font_hex_data[i]) {
  65                         case ' ':
  66                         case '\t':
  67                                 //Skip spaces at start of line.
  68                                 if(lsptr == i)
  69                                         lsptr++;
  70                         case '\r':
  71                         case '\n':
  72                         case '\0': {
  73                                 char* end;
  74                                 uint32_t cp;
  75                                 size_t fdatastart;
  76                                 //Is this a comment?
  77                                 if(lsptr == i || font_hex_data[lsptr] == '#')
  78                                         goto skip_line;
  79                                 cp = strtoul(font_hex_data + lsptr, &end, 16);
  80                                 if(*end != ':') {
  81                                         messages << "Malformed line " << lc << " in font data" << std::endl;
  82                                         goto skip_line;
  83                                 }
  84                                 fdatastart = end - font_hex_data + 1;
  85                                 if(i - fdatastart == 32) {
  86                                         //Narrow glyph.
  87                                         font_glyph_offsets[cp] = font_glyph_data.size();
  88                                         font_glyph_data.push_back(TAG_NARROW);
  89                                         for(uint32_t k = 0; k < 4; k++)
  90                                                 font_glyph_data.push_back(parse_word(end + 1 + 8 * k));
  91                                 } else if(i - fdatastart == 64) {
  92                                         //Wide glyph.
  93                                         font_glyph_offsets[cp] = font_glyph_data.size();
  94                                         font_glyph_data.push_back(TAG_WIDE);
  95                                         for(uint32_t k = 0; k < 8; k++)
  96                                                 font_glyph_data.push_back(parse_word(end + 1 + 8 * k));
  97                                 } else {
  98                                         messages << "Malformed line " << lc << " in font data" << std::endl;
  99                                         goto skip_line;
 100                                 }
 101 skip_line:
 102                                 if(font_hex_data[i] != '\r' || font_hex_data[i + 1] != '\n')
 103                                         lc++;
 104                                 lsptr = i + 1;
 105                         }
 106                         };
 107                         if(!font_hex_data[i])
 108                                 break;
 109                 }
 110
 111                 //Special characters.
 112                 font_glyph_offsets[9] = 5;
 113                 font_glyph_offsets[10] = 6;
 114                 font_glyph_offsets[32] = 0;
 115
 116                 uint32_t glyphs = 0;
 117                 uint32_t glyphs_narrow = 0;
 118                 uint32_t glyphs_wide = 0;
 119                 uint32_t glyphs_special = 0;
 120                 for(auto i : font_glyph_offsets) {
 121                         if(font_glyph_data[i.second] == TAG_NARROW)
 122                                 glyphs_narrow++;
 123                         else if(font_glyph_data[i.second] == TAG_WIDE)
 124                                 glyphs_wide++;
 125                         else
 126                                 glyphs_special++;
 127                         glyphs++;
 128                 }
 129                 messages << "Loaded font data: " << glyphs << " glyphs (" << glyphs_narrow << " narrow, " <<
 130                         glyphs_wide << " wide, " << glyphs_special << " special)." << std::endl;
 131                 iflag = true;
 132         }
 133
 134         inline uint32_t find_font_glyph_offset(uint32_t cp)
 135         {
 136                 return font_glyph_offsets.count(cp) ?  font_glyph_offsets[cp] : 0;
 137         }
 138
 139         inline uint32_t process_tag(uint32_t tag, int32_t& x, int32_t& y, int32_t orig_x)
 140         {
 141                 uint32_t dwidth;
 142                 switch(tag & TAG_WIDTH_MASK) {
 143                 case TAG_ZEROWIDTH:
 144                         dwidth = 0;
 145                         break;
 146                 case TAG_NARROW:
 147                         dwidth = 8;
 148                         break;
 149                 case TAG_WIDE:
 150                         dwidth = 16;
 151                         break;
 152                 case TAG_TABULATION:
 153                         dwidth = 0x40 - (x & 0x3F);
 154                         break;
 155                 }
 156                 x += dwidth;
 157                 if(tag & TAG_LINECHANGE) {
 158                         y += 16;
 159                         x = orig_x;
 160                 }
 161                 return dwidth;
 162         }
 163
 164         inline bool is_visible(uint32_t tag)
 165         {
 166                 return ((tag & TAG_WIDTH_MASK) == TAG_NARROW || (tag & TAG_WIDTH_MASK) == TAG_WIDE);
 167         }
 168 }
 169
 170
 171 void do_init_font()
 172 {
 173         init_font();
 174 }
 175
 176 std::pair<uint32_t, const uint32_t*> find_glyph(uint32_t codepoint, int32_t x, int32_t y, int32_t orig_x,
 177         int32_t& next_x, int32_t& next_y) throw()
 178 {
 179         init_font();
 180         next_x = x;
 181         next_y = y;
 182         uint32_t offset = find_font_glyph_offset(codepoint);
 183         uint32_t tag = font_glyph_data[offset];
 184         uint32_t dwidth = process_tag(tag, next_x, next_y, orig_x);
 185         bool visible = is_visible(tag);
 186         return std::pair<uint32_t, const uint32_t*>(dwidth, visible ? &font_glyph_data[offset + 1] : NULL);
 187 }
 188
 189 render_object::~render_object() throw()
 190 {
 191 }
 192
 193 void render_text(struct screen& scr, int32_t x, int32_t y, const std::string& text, premultiplied_color fg,
 194         premultiplied_color bg) throw(std::bad_alloc)
 195 {
 196         int32_t orig_x = x;
 197         uint32_t unicode_code = 0;
 198         uint8_t unicode_left = 0;
 199         for(size_t i = 0; i < text.length(); i++) {
 200                 uint8_t ch = text[i];
 201                 if(ch < 128)
 202                         unicode_code = text[i];
 203                 else if(ch < 192) {
 204                                 if(!unicode_left)
 205                                         continue;
 206                                 unicode_code = 64 * unicode_code + ch - 128;
 207                                 if(--unicode_left)
 208                                         continue;
 209                 } else if(ch < 224) {
 210                         unicode_code = ch - 192;
 211                         unicode_left = 1;
 212                         continue;
 213                 } else if(ch < 240) {
 214                         unicode_code = ch - 224;
 215                         unicode_left = 2;
 216                         continue;
 217                 } else if(ch < 248) {
 218                         unicode_code = ch - 240;
 219                         unicode_left = 3;
 220                         continue;
 221                 } else
 222                         continue;
 223                 int32_t next_x, next_y;
 224                 auto p = find_glyph(unicode_code, x, y, orig_x, next_x, next_y);
 225                 uint32_t dx = 0;
 226                 uint32_t dw = p.first;
 227                 uint32_t dy = 0;
 228                 uint32_t dh = 16;
 229                 uint32_t cx = static_cast<uint32_t>(static_cast<int32_t>(scr.originx) + x);
 230                 uint32_t cy = static_cast<uint32_t>(static_cast<int32_t>(scr.originy) + y);
 231                 while(cx > scr.width && dw > 0) {
 232                         dx++;
 233                         dw--;
 234                         cx++;
 235                 }
 236                 while(cy > scr.height && dh > 0) {
 237                         dy++;
 238                         dh--;
 239                         cy++;
 240                 }
 241                 while(cx + dw > scr.width && dw > 0)
 242                         dw--;
 243                 while(cy + dh > scr.height && dh > 0)
 244                         dh--;
 245                 if(!dw || !dh)
 246                         continue;       //Outside screen.
 247
 248                 if(p.second == NULL) {
 249                         //Blank glyph.
 250                         for(uint32_t j = 0; j < dh; j++) {
 251                                 uint32_t* base = scr.rowptr(cy + j) + cx;
 252                                 for(uint32_t i = 0; i < dw; i++)
 253                                         bg.apply(base[i]);
 254                         }
 255                 } else if(p.first == 16) {
 256                         //Wide glyph.
 257                         for(uint32_t j = 0; j < dh; j++) {
 258                                 uint32_t dataword = p.second[(dy + j) >> 1];
 259                                 uint32_t* base = scr.rowptr(cy + j) + cx;
 260                                 uint32_t rbit = (~((dy + j) << 4) & 0x1F) - dx;
 261                                 for(uint32_t i = 0; i < dw; i++)
 262                                         if((dataword >> (rbit - i)) & 1)
 263                                                 fg.apply(base[i]);
 264                                         else
 265                                                 bg.apply(base[i]);
 266                         }
 267                 } else {
 268                         //narrow glyph.
 269                         for(uint32_t j = 0; j < dh; j++) {
 270                                 uint32_t dataword = p.second[(dy + j) >> 2];
 271                                 uint32_t* base = scr.rowptr(cy + j) + cx;
 272                                 uint32_t rbit = (~((dy + j) << 3) & 0x1F) - dx;
 273                                 for(uint32_t i = 0; i < dw; i++)
 274                                         if((dataword >> (rbit - i)) & 1)
 275                                                 fg.apply(base[i]);
 276                                         else
 277                                                 bg.apply(base[i]);
 278                         }
 279                 }
 280                 x = next_x;
 281                 y = next_y;
 282         }
 283 }
 284
 285 void render_queue::add(struct render_object& obj) throw(std::bad_alloc)
 286 {
 287         q.push_back(&obj);
 288 }
 289
 290 void render_queue::run(struct screen& scr) throw()
 291 {
 292         for(auto i : q) {
 293                 try {
 294                         (*i)(scr);
 295                 } catch(...) {
 296                 }
 297                 delete i;
 298         }
 299         q.clear();
 300 }
 301
 302 void render_queue::clear() throw()
 303 {
 304         for(auto i : q)
 305                 delete i;
 306         q.clear();
 307 }
 308
 309 render_queue::~render_queue() throw()
 310 {
 311         clear();
 312 }
 313
 314 uint32_t screen::make_color(uint8_t r, uint8_t g, uint8_t b) throw()
 315 {
 316         uint32_t _r = r;
 317         uint32_t _g = g;
 318         uint32_t _b = b;
 319         return (_r << 16) + (_g << 8) + _b;
 320 }
 321
 322 lcscreen::lcscreen(const uint32_t* mem, bool hires, bool interlace, bool overscan, bool region) throw()
 323 {
 324         uint32_t dataoffset = 0;
 325         width = hires ? 512 : 256;
 326         height = 0;
 327         if(region) {
 328                 //PAL.
 329                 height = 239;
 330                 dataoffset = overscan ? 9 : 1;
 331         } else {
 332                 //presumably NTSC.
 333                 height = 224;
 334                 dataoffset = overscan ? 16 : 9;
 335         }
 336         if(interlace)
 337                 height <<= 1;
 338         memory = mem + dataoffset * 1024;
 339         pitch = interlace ? 512 : 1024;
 340         user_memory = false;
 341 }
 342
 343 lcscreen::lcscreen(const uint32_t* mem, uint32_t _width, uint32_t _height) throw()
 344 {
 345         width = _width;
 346         height = _height;
 347         memory = mem;
 348         pitch = width;
 349         user_memory = false;
 350 }
 351
 352 lcscreen::lcscreen() throw()
 353 {
 354         width = 0;
 355         height = 0;
 356         memory = NULL;
 357         user_memory = true;
 358         pitch = 0;
 359         allocated = 0;
 360 }
 361
 362 lcscreen::lcscreen(const lcscreen& ls) throw(std::bad_alloc)
 363 {
 364         width = ls.width;
 365         height = ls.height;
 366         pitch = width;
 367         user_memory = true;
 368         allocated = static_cast<size_t>(width) * height;
 369         memory = new uint32_t[allocated];
 370         for(size_t l = 0; l < height; l++)
 371                 memcpy(const_cast<uint32_t*>(memory + l * width), ls.memory + l * ls.pitch, 4 * width);
 372 }
 373
 374 lcscreen& lcscreen::operator=(const lcscreen& ls) throw(std::bad_alloc, std::runtime_error)
 375 {
 376         if(!user_memory)
 377                 throw std::runtime_error("Can't copy to non-user memory");
 378         if(this == &ls)
 379                 return *this;
 380         if(allocated < static_cast<size_t>(ls.width) * ls.height) {
 381                 size_t p_allocated = static_cast<size_t>(ls.width) * ls.height;
 382                 memory = new uint32_t[p_allocated];
 383                 allocated = p_allocated;
 384         }
 385         width = ls.width;
 386         height = ls.height;
 387         pitch = width;
 388         for(size_t l = 0; l < height; l++)
 389                 memcpy(const_cast<uint32_t*>(memory + l * width), ls.memory + l * ls.pitch, 4 * width);
 390         return *this;
 391 }
 392
 393 lcscreen::~lcscreen()
 394 {
 395         if(user_memory)
 396                 delete[] const_cast<uint32_t*>(memory);
 397 }
 398
 399 void lcscreen::load(const std::vector<char>& data) throw(std::bad_alloc, std::runtime_error)
 400 {
 401         if(!user_memory)
 402                 throw std::runtime_error("Can't load to non-user memory");
 403         const uint8_t* data2 = reinterpret_cast<const uint8_t*>(&data[0]);
 404         if(data.size() < 2)
 405                 throw std::runtime_error("Corrupt saved screenshot data");
 406         uint32_t _width = static_cast<uint32_t>(data2[0]) * 256 + static_cast<uint32_t>(data2[1]);
 407         if(_width > 1 && data.size() % (3 * _width) != 2)
 408                 throw std::runtime_error("Corrupt saved screenshot data");
 409         uint32_t _height = (data.size() - 2) / (3 * _width);
 410         if(allocated < static_cast<size_t>(_width) * _height) {
 411                 size_t p_allocated = static_cast<size_t>(_width) * _height;
 412                 memory = new uint32_t[p_allocated];
 413                 allocated = p_allocated;
 414         }
 415         uint32_t* mem = const_cast<uint32_t*>(memory);
 416         width = _width;
 417         height = _height;
 418         pitch = width;
 419         for(size_t i = 0; i < (data.size() - 2) / 3; i++)
 420                 mem[i] = static_cast<uint32_t>(data2[2 + 3 * i]) * 65536 +
 421                         static_cast<uint32_t>(data2[2 + 3 * i + 1]) * 256 +
 422                         static_cast<uint32_t>(data2[2 + 3 * i + 2]);
 423 }
 424
 425 void lcscreen::save(std::vector<char>& data) throw(std::bad_alloc)
 426 {
 427         data.resize(2 + 3 * static_cast<size_t>(width) * height);
 428         uint8_t* data2 = reinterpret_cast<uint8_t*>(&data[0]);
 429         data2[0] = (width >> 8);
 430         data2[1] = width;
 431         for(size_t i = 0; i < (data.size() - 2) / 3; i++) {
 432                 data[2 + 3 * i] = memory[(i / width) * pitch + (i % width)] >> 16;
 433                 data[2 + 3 * i + 1] = memory[(i / width) * pitch + (i % width)] >> 8;
 434                 data[2 + 3 * i + 2] = memory[(i / width) * pitch + (i % width)];
 435         }
 436 }
 437
 438 void lcscreen::save_png(const std::string& file) throw(std::bad_alloc, std::runtime_error)
 439 {
 440         uint8_t* buffer = new uint8_t[3 * static_cast<size_t>(width) * height];
 441         for(uint32_t j = 0; j < height; j++)
 442                 for(uint32_t i = 0; i < width; i++) {
 443                         uint32_t word = memory[pitch * j + i];
 444                         uint32_t l = 1 + ((word >> 15) & 0xF);
 445                         uint32_t r = l * ((word >> 0) & 0x1F);
 446                         uint32_t g = l * ((word >> 5) & 0x1F);
 447                         uint32_t b = l * ((word >> 10) & 0x1F);
 448                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 0] = r * 255 / 496;
 449                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 1] = g * 255 / 496;
 450                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 2] = b * 255 / 496;
 451                 }
 452         try {
 453                 save_png_data(file, buffer, width, height);
 454                 delete[] buffer;
 455         } catch(...) {
 456                 delete[] buffer;
 457                 throw;
 458         }
 459 }
 460
 461 void screen::copy_from(lcscreen& scr, uint32_t hscale, uint32_t vscale) throw()
 462 {
 463         if(width < originx || height < originy) {
 464                 //Just clear the screen.
 465                 for(uint32_t y = 0; y < height; y++)
 466                         memset(rowptr(y), 0, 4 * width);
 467                 return;
 468         }
 469         uint32_t copyable_width = (width - originx) / hscale;
 470         uint32_t copyable_height = (height - originy) / vscale;
 471         copyable_width = (copyable_width > scr.width) ? scr.width : copyable_width;
 472         copyable_height = (copyable_height > scr.height) ? scr.height : copyable_height;
 473         for(uint32_t y = 0; y < height; y++)
 474                 memset(rowptr(y), 0, 4 * width);
 475         for(uint32_t y = 0; y < copyable_height; y++) {
 476                 uint32_t line = y * vscale + originy;
 477                 uint32_t* ptr = rowptr(line) + originx;
 478                 const uint32_t* sbase = scr.memory + y * scr.pitch;
 479                 for(uint32_t x = 0; x < copyable_width; x++) {
 480                         uint32_t c = palette[sbase[x] & 0x7FFFF];
 481                         for(uint32_t i = 0; i < hscale; i++)
 482                                 *(ptr++) = c;
 483                 }
 484                 for(uint32_t j = 1; j < vscale; j++)
 485                         memcpy(rowptr(line + j) + originx, rowptr(line) + originx, 4 * hscale * copyable_width);
 486         }
 487 }
 488
 489 void screen::reallocate(uint32_t _width, uint32_t _height, bool upside_down) throw(std::bad_alloc)
 490 {
 491         if(_width == width && _height == height)
 492                 return;
 493         if(!_width || !_height) {
 494                 width = height = originx = originy = pitch = 0;
 495                 if(memory && !user_memory)
 496                         delete[] memory;
 497                 memory = NULL;
 498                 user_memory = false;
 499                 flipped = upside_down;
 500                 return;
 501         }
 502         uint32_t* newmem = new uint32_t[_width * _height];
 503         width = _width;
 504         height = _height;
 505         pitch = 4 * _width;
 506         if(memory && !user_memory)
 507                 delete[] memory;
 508         memory = newmem;
 509         user_memory = false;
 510         flipped = upside_down;
 511 }
 512
 513 void screen::set(uint32_t* _memory, uint32_t _width, uint32_t _height, uint32_t _pitch) throw()
 514 {
 515         if(memory && !user_memory)
 516                 delete[] memory;
 517         width = _width;
 518         height = _height;
 519         pitch = _pitch;
 520         user_memory = true;
 521         memory = _memory;
 522         flipped = false;
 523 }
 524
 525 void screen::set_origin(uint32_t _originx, uint32_t _originy) throw()
 526 {
 527         originx = _originx;
 528         originy = _originy;
 529 }
 530
 531
 532 uint32_t* screen::rowptr(uint32_t row) throw()
 533 {
 534         if(flipped)
 535                 row = height - row - 1;
 536         return reinterpret_cast<uint32_t*>(reinterpret_cast<uint8_t*>(memory) + row * pitch);
 537 }
 538
 539 screen::screen() throw()
 540 {
 541         memory = NULL;
 542         width = height = originx = originy = pitch = 0;
 543         user_memory = false;
 544         flipped = false;
 545         palette = NULL;
 546         set_palette(16, 8, 0);
 547 }
 548
 549 screen::~screen() throw()
 550 {
 551         if(memory && !user_memory)
 552                 delete[] memory;
 553 }
 554
 555 void clip_range(uint32_t origin, uint32_t size, int32_t base, int32_t& minc, int32_t& maxc) throw()
 556 {
 557         int64_t _origin = origin;
 558         int64_t _size = size;
 559         int64_t _base = base;
 560         int64_t _minc = minc;
 561         int64_t _maxc = maxc;
 562         int64_t mincoordinate = _base + _origin + _minc;
 563         int64_t maxcoordinate = _base + _origin + _maxc;
 564         if(mincoordinate < 0)
 565                 _minc = _minc - mincoordinate;
 566         if(maxcoordinate > _size)
 567                 _maxc = _maxc - (maxcoordinate - _size);
 568         if(_minc >= maxc) {
 569                 minc = 0;
 570                 maxc = 0;
 571         } else {
 572                 minc = _minc;
 573                 maxc = _maxc;
 574         }
 575 }
 576
 577 void screen::set_palette(uint32_t r, uint32_t g, uint32_t b)
 578 {
 579         if(!palette)
 580                 palette = new uint32_t[0x80000];
 581         else if(r == palette_r && g == palette_g && b == palette_b)
 582                 return;
 583         for(size_t i = 0; i < static_cast<size_t>(width) * height; i++) {
 584                 uint32_t word = memory[i];
 585                 uint32_t R = (word >> palette_r) & 0xFF;
 586                 uint32_t G = (word >> palette_g) & 0xFF;
 587                 uint32_t B = (word >> palette_b) & 0xFF;
 588                 memory[i] = (R << r) | (G << g) | (B << b);
 589         }
 590         for(unsigned i = 0; i < 0x80000; i++) {
 591                 unsigned l = 1 + ((i >> 15) & 0xF);
 592                 unsigned R = (i >> 0) & 0x1F;
 593                 unsigned G = (i >> 5) & 0x1F;
 594                 unsigned B = (i >> 10) & 0x1F;
 595                 double _l = static_cast<double>(l);
 596                 double m = 255.0 / 496.0;
 597                 R = floor(m * R * _l + 0.5);
 598                 G = floor(m * G * _l + 0.5);
 599                 B = floor(m * B * _l + 0.5);
 600                 palette[i] = (R << r) | (G << g) | (B << b);
 601         }
 602         palette_r = r;
 603         palette_g = g;
 604         palette_b = b;
 605 }