render.cpp

   1 #include "lsnes.hpp"
   2 #include <snes/snes.hpp>
   3
   4 #include "render.hpp"
   5 #include "png.hpp"
   6 #include <sstream>
   7 #include <list>
   8 #include <iomanip>
   9 #include <cstdint>
  10 #include <string>
  11 typedef uint8_t uint8;
  12 typedef uint16_t uint16;
  13 typedef uint32_t uint32;
  14 typedef int8_t int8;
  15 typedef int16_t int16;
  16 typedef int32_t int32;
  17 #include <nall/platform.hpp>
  18 #include <nall/endian.hpp>
  19 #include <nall/varint.hpp>
  20 #include <nall/bit.hpp>
  21 #include <nall/serializer.hpp>
  22 #include <nall/property.hpp>
  23 using namespace nall;
  24 #include <ui-libsnes/libsnes.hpp>
  25 using namespace SNES;
  26
  27
  28 extern uint32_t fontdata[];
  29
  30 namespace
  31 {
  32         inline uint32_t blend(uint32_t orig, uint16_t ialpha, uint32_t pl, uint32_t ph) throw()
  33         {
  34                 const uint32_t X = 0xFF00FFU;
  35                 const uint32_t Y = 0xFF00FF00U;
  36                 return ((ialpha * ((orig >> 8) & X) + ph) & Y) | (((ialpha * (orig & X) + pl)
  37                         >> 8) & X);
  38         }
  39
  40         //This is Jenkin's MIX function.
  41         uint32_t keyhash(uint32_t key, uint32_t item, uint32_t mod) throw()
  42         {
  43                 uint32_t a = key;
  44                 uint32_t b = 0;
  45                 uint32_t c = item;
  46                 a=a-b;  a=a-c;  a=a^(c >> 13);
  47                 b=b-c;  b=b-a;  b=b^(a << 8);
  48                 c=c-a;  c=c-b;  c=c^(b >> 13);
  49                 a=a-b;  a=a-c;  a=a^(c >> 12);
  50                 b=b-c;  b=b-a;  b=b^(a << 16);
  51                 c=c-a;  c=c-b;  c=c^(b >> 5);
  52                 a=a-b;  a=a-c;  a=a^(c >> 3);
  53                 b=b-c;  b=b-a;  b=b^(a << 10);
  54                 c=c-a;  c=c-b;  c=c^(b >> 15);
  55                 return c % mod;
  56         }
  57 }
  58
  59 //Locate glyph in font. Returns <width, offset> pair. Zero offset should be interpretted as an empty
  60 //glyph.
  61 std::pair<uint32_t, size_t> find_glyph(uint32_t codepoint, int32_t x, int32_t y, int32_t orig_x,
  62         int32_t& next_x, int32_t& next_y) throw()
  63 {
  64         uint32_t cwidth = 0;
  65         if(codepoint == 9) {
  66                 cwidth = 64 - (x - orig_x) % 64;
  67                 next_x = x + cwidth;
  68                 next_y = y;
  69                 return std::make_pair(cwidth, 0);
  70         } else if(codepoint == 10) {
  71                 next_x = orig_x;
  72                 next_y = y + 16;
  73                 return std::make_pair(0, 0);
  74         } else if(codepoint == 32) {
  75                 next_x = x + 8;
  76                 next_y = y;
  77                 return std::make_pair(8, 0);
  78         } else {
  79                 uint32_t mdir = fontdata[0];
  80                 uint32_t mseed = fontdata[mdir];
  81                 uint32_t msize = fontdata[mdir + 1];
  82                 uint32_t midx = keyhash(mseed, codepoint, msize);
  83                 uint32_t sdir = fontdata[mdir + 2 + midx];
  84                 if(!fontdata[sdir + 1]) {
  85                         //Character not found.
  86                         next_x = x + 8;
  87                         next_y = y;
  88                         return std::make_pair(8, 0);
  89                 }
  90                 uint32_t sseed = fontdata[sdir];
  91                 uint32_t ssize = fontdata[sdir + 1];
  92                 uint32_t sidx = keyhash(sseed, codepoint, ssize);
  93                 if(fontdata[sdir + 2 + 2 * sidx] != codepoint) {
  94                         //Character not found.
  95                         next_x = x + 8;
  96                         next_y = y;
  97                         return std::make_pair(8, 0);
  98                 }
  99                 bool wide = (fontdata[fontdata[sdir + 2 + 2 * sidx + 1]] != 0);
 100                 next_x = x + (wide ? 16 : 8);
 101                 next_y = y;
 102                 return std::make_pair(wide ? 16 : 8, fontdata[sdir + 2 + 2 * sidx + 1] + 1);
 103         }
 104 }
 105
 106 render_object::~render_object() throw()
 107 {
 108 }
 109
 110 void render_text(struct screen& scr, int32_t x, int32_t y, const std::string& text, uint32_t fg,
 111         uint16_t fgalpha, uint32_t bg, uint16_t bgalpha) throw(std::bad_alloc)
 112 {
 113         uint32_t pfgl = (fg & 0xFF00FF) * fgalpha;
 114         uint32_t pfgh = ((fg >> 8) & 0xFF00FF) * fgalpha;
 115         uint32_t pbgl = (bg & 0xFF00FF) * bgalpha;
 116         uint32_t pbgh = ((bg >> 8) & 0xFF00FF) * bgalpha;
 117         uint16_t ifga = 256 - fgalpha;
 118         uint16_t ibga = 256 - bgalpha;
 119         int32_t orig_x = x;
 120         uint32_t unicode_code = 0;
 121         uint8_t unicode_left = 0;
 122         for(size_t i = 0; i < text.length(); i++) {
 123                 uint8_t ch = text[i];
 124                 if(ch < 128)
 125                         unicode_code = text[i];
 126                 else if(ch < 192) {
 127                                 if(!unicode_left)
 128                                         continue;
 129                                 unicode_code = 64 * unicode_code + ch - 128;
 130                                 if(--unicode_left)
 131                                         continue;
 132                 } else if(ch < 224) {
 133                         unicode_code = ch - 192;
 134                         unicode_left = 1;
 135                         continue;
 136                 } else if(ch < 240) {
 137                         unicode_code = ch - 224;
 138                         unicode_left = 2;
 139                         continue;
 140                 } else if(ch < 248) {
 141                         unicode_code = ch - 240;
 142                         unicode_left = 3;
 143                         continue;
 144                 } else
 145                         continue;
 146                 int32_t next_x, next_y;
 147                 auto p = find_glyph(unicode_code, x, y, orig_x, next_x, next_y);
 148                 uint32_t dx = 0;
 149                 uint32_t dw = p.first;
 150                 uint32_t dy = 0;
 151                 uint32_t dh = 16;
 152                 uint32_t cx = static_cast<uint32_t>(static_cast<int32_t>(scr.originx) + x);
 153                 uint32_t cy = static_cast<uint32_t>(static_cast<int32_t>(scr.originy) + y);
 154                 while(cx > scr.width && dw > 0) {
 155                         dx++;
 156                         dw--;
 157                         cx++;
 158                 }
 159                 while(cy > scr.height && dh > 0) {
 160                         dy++;
 161                         dh--;
 162                         cy++;
 163                 }
 164                 while(cx + dw > scr.width && dw > 0)
 165                         dw--;
 166                 while(cy + dh > scr.height && dh > 0)
 167                         dh--;
 168                 if(!dw || !dh)
 169                         continue;       //Outside screen.
 170
 171                 if(p.second == 0) {
 172                         //Blank glyph.
 173                         for(uint32_t j = 0; j < dh; j++) {
 174                                 uint32_t* base = scr.rowptr(cy + j) + cx;
 175                                 for(uint32_t i = 0; i < dw; i++)
 176                                         base[i] = blend(base[i], ibga, pbgl, pbgh);
 177                         }
 178                 } else {
 179                         //narrow/wide glyph.
 180                         for(uint32_t j = 0; j < dh; j++) {
 181                                 uint32_t dataword = fontdata[p.second + (dy + j) / (32 / p.first)];
 182                                 uint32_t* base = scr.rowptr(cy + j) + cx;
 183                                 for(uint32_t i = 0; i < dw; i++)
 184                                         if(((dataword >> (31 - ((dy + j) % (32 / p.first)) * p.first - (dx + i))) & 1))
 185                                                 base[i] = blend(base[i], ifga, pfgl, pfgh);
 186                                         else
 187                                                 base[i] = blend(base[i], ibga, pbgl, pbgh);
 188                         }
 189                 }
 190                 x = next_x;
 191                 y = next_y;
 192         }
 193 }
 194
 195 void render_queue::add(struct render_object& obj) throw(std::bad_alloc)
 196 {
 197         q.push_back(&obj);
 198 }
 199
 200 void render_queue::run(struct screen& scr) throw()
 201 {
 202         for(auto i = q.begin(); i != q.end(); i++) {
 203                 try {
 204                         (**i)(scr);
 205                 } catch(...) {
 206                 }
 207                 delete *i;
 208         }
 209         q.clear();
 210 }
 211
 212 void render_queue::clear() throw()
 213 {
 214         for(auto i = q.begin(); i != q.end(); i++)
 215                 delete *i;
 216         q.clear();
 217 }
 218
 219 render_queue::~render_queue() throw()
 220 {
 221         clear();
 222 }
 223
 224 uint32_t screen::make_color(uint8_t r, uint8_t g, uint8_t b) throw()
 225 {
 226         return (static_cast<uint32_t>(r) << active_rshift) |
 227                 (static_cast<uint32_t>(g) << active_gshift) |
 228                 (static_cast<uint32_t>(b) << active_bshift);
 229 }
 230
 231 lcscreen::lcscreen(const uint16_t* mem, bool hires, bool interlace, bool overscan, bool region) throw()
 232 {
 233         uint32_t dataoffset = 0;
 234         width = hires ? 512 : 256;
 235         height = 0;
 236         if(region) {
 237                 //PAL.
 238                 height = 239;
 239                 dataoffset = overscan ? 9 : 1;
 240         } else {
 241                 //presumably NTSC.
 242                 height = 224;
 243                 dataoffset = overscan ? 16 : 9;
 244         }
 245         if(interlace)
 246                 height <<= 1;
 247         memory = mem + dataoffset * 1024;
 248         pitch = interlace ? 512 : 1024;
 249         user_memory = false;
 250 }
 251
 252 lcscreen::lcscreen(const uint16_t* mem, uint32_t _width, uint32_t _height) throw()
 253 {
 254         width = _width;
 255         height = _height;
 256         memory = mem;
 257         pitch = width;
 258         user_memory = false;
 259 }
 260
 261 lcscreen::lcscreen() throw()
 262 {
 263         width = 0;
 264         height = 0;
 265         memory = NULL;
 266         user_memory = true;
 267         pitch = 0;
 268         allocated = 0;
 269 }
 270
 271 lcscreen::lcscreen(const lcscreen& ls) throw(std::bad_alloc)
 272 {
 273         width = ls.width;
 274         height = ls.height;
 275         pitch = width;
 276         user_memory = true;
 277         allocated = static_cast<size_t>(width) * height;
 278         memory = new uint16_t[allocated];
 279         for(size_t l = 0; l < height; l++)
 280                 memcpy(const_cast<uint16_t*>(memory + l * width), ls.memory + l * ls.pitch, 2 * width);
 281 }
 282
 283 lcscreen& lcscreen::operator=(const lcscreen& ls) throw(std::bad_alloc, std::runtime_error)
 284 {
 285         if(!user_memory)
 286                 throw std::runtime_error("Can't copy to non-user memory");
 287         if(this == &ls)
 288                 return *this;
 289         if(allocated < static_cast<size_t>(ls.width) * ls.height) {
 290                 size_t p_allocated = static_cast<size_t>(ls.width) * ls.height;
 291                 memory = new uint16_t[p_allocated];
 292                 allocated = p_allocated;
 293         }
 294         width = ls.width;
 295         height = ls.height;
 296         pitch = width;
 297         for(size_t l = 0; l < height; l++)
 298                 memcpy(const_cast<uint16_t*>(memory + l * width), ls.memory + l * ls.pitch, 2 * width);
 299         return *this;
 300 }
 301
 302 lcscreen::~lcscreen()
 303 {
 304         if(user_memory)
 305                 delete[] const_cast<uint16_t*>(memory);
 306 }
 307
 308 void lcscreen::load(const std::vector<char>& data) throw(std::bad_alloc, std::runtime_error)
 309 {
 310         if(!user_memory)
 311                 throw std::runtime_error("Can't load to non-user memory");
 312         const uint8_t* data2 = reinterpret_cast<const uint8_t*>(&data[0]);
 313         if(data.size() < 2)
 314                 throw std::runtime_error("Corrupt saved screenshot data");
 315         uint32_t _width = static_cast<uint32_t>(data2[0]) * 256 + static_cast<uint32_t>(data2[1]);
 316         if(_width > 1 && data.size() % (2 * _width) != 2)
 317                 throw std::runtime_error("Corrupt saved screenshot data");
 318         uint32_t _height = (data.size() - 2) / (2 * _width);
 319         if(allocated < static_cast<size_t>(_width) * _height) {
 320                 size_t p_allocated = static_cast<size_t>(_width) * _height;
 321                 memory = new uint16_t[p_allocated];
 322                 allocated = p_allocated;
 323         }
 324         uint16_t* mem = const_cast<uint16_t*>(memory);
 325         width = _width;
 326         height = _height;
 327         pitch = width;
 328         for(size_t i = 0; i < (data.size() - 2) / 2; i++)
 329                 mem[i] = static_cast<uint16_t>(data2[2 + 2 * i]) * 256 +
 330                         static_cast<uint16_t>(data2[2 + 2 * i + 1]);
 331 }
 332
 333 void lcscreen::save(std::vector<char>& data) throw(std::bad_alloc)
 334 {
 335         data.resize(2 + 2 * static_cast<size_t>(width) * height);
 336         uint8_t* data2 = reinterpret_cast<uint8_t*>(&data[0]);
 337         data2[0] = (width >> 8);
 338         data2[1] = width;
 339         for(size_t i = 0; i < (data.size() - 2) / 2; i++) {
 340                 data[2 + 2 * i] = memory[(i / width) * pitch + (i % width)] >> 8;
 341                 data[2 + 2 * i + 1] = memory[(i / width) * pitch + (i % width)];
 342         }
 343 }
 344
 345 void lcscreen::save_png(const std::string& file) throw(std::bad_alloc, std::runtime_error)
 346 {
 347         unsigned char clevels[32];
 348         for(unsigned i = 0; i < 32; i++)
 349                 clevels[i] = 255 * i / 31;
 350         uint8_t* buffer = new uint8_t[3 * static_cast<size_t>(width) * height];
 351         for(uint32_t j = 0; j < height; j++)
 352                 for(uint32_t i = 0; i < width; i++) {
 353                         uint16_t word = memory[pitch * j + i];
 354                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 0] = clevels[(word >> 10) & 0x1F];
 355                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 1] = clevels[(word >> 5) & 0x1F];
 356                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 2] = clevels[(word) & 0x1F];
 357                 }
 358         try {
 359                 save_png_data(file, buffer, width, height);
 360                 delete[] buffer;
 361         } catch(...) {
 362                 delete[] buffer;
 363                 throw;
 364         }
 365 }
 366
 367 void screen::copy_from(lcscreen& scr, uint32_t hscale, uint32_t vscale) throw()
 368 {
 369         uint32_t copyable_width = (width - originx) / hscale;
 370         uint32_t copyable_height = (height - originy) / vscale;
 371         copyable_width = (copyable_width > scr.width) ? scr.width : copyable_width;
 372         copyable_height = (copyable_height > scr.height) ? scr.height : copyable_height;
 373         for(uint32_t y = 0; y < height; y++) {
 374                 memset(rowptr(y), 0, 4 * width);
 375         }
 376         for(uint32_t y = 0; y < copyable_height; y++) {
 377                 uint32_t line = y * vscale + originy;
 378                 uint32_t* ptr = rowptr(line) + originx;
 379                 const uint16_t* sbase = scr.memory + y * scr.pitch;
 380                 for(uint32_t x = 0; x < copyable_width; x++) {
 381                         uint32_t c = palette[sbase[x] % 32768];
 382                         for(uint32_t i = 0; i < hscale; i++)
 383                                 *(ptr++) = c;
 384                 }
 385                 for(uint32_t j = 1; j < vscale; j++)
 386                         memcpy(rowptr(line + j) + originx, rowptr(line) + originx, 4 * hscale * copyable_width);
 387         }
 388 }
 389
 390 void screen::reallocate(uint32_t _width, uint32_t _height, uint32_t _originx, uint32_t _originy, bool upside_down)
 391         throw(std::bad_alloc)
 392 {
 393         if(_width == width && _height == height) {
 394                 originx = _originx;
 395                 originy = _originy;
 396                 return;
 397         }
 398         if(!_width || !_height) {
 399                 width = height = originx = originy = pitch = 0;
 400                 if(memory && !user_memory)
 401                         delete[] memory;
 402                 memory = NULL;
 403                 user_memory = false;
 404                 flipped = upside_down;
 405                 return;
 406         }
 407         uint32_t* newmem = new uint32_t[_width * _height];
 408         width = _width;
 409         height = _height;
 410         originx = _originx;
 411         originy = _originy;
 412         pitch = 4 * _width;
 413         if(memory && !user_memory)
 414                 delete[] memory;
 415         memory = newmem;
 416         user_memory = false;
 417         flipped = upside_down;
 418 }
 419
 420 void screen::set(uint32_t* _memory, uint32_t _width, uint32_t _height, uint32_t _originx, uint32_t _originy,
 421         uint32_t _pitch) throw()
 422 {
 423         if(memory && !user_memory)
 424                 delete[] memory;
 425         width = _width;
 426         height = _height;
 427         originx = _originx;
 428         originy = _originy;
 429         pitch = _pitch;
 430         user_memory = true;
 431         memory = _memory;
 432         flipped = false;
 433 }
 434
 435 uint32_t* screen::rowptr(uint32_t row) throw()
 436 {
 437         if(flipped)
 438                 row = height - row - 1;
 439         return reinterpret_cast<uint32_t*>(reinterpret_cast<uint8_t*>(memory) + row * pitch);
 440 }
 441
 442 screen::screen() throw()
 443 {
 444         uint32_t _magic = 403703808;
 445         uint8_t* magic = reinterpret_cast<uint8_t*>(&_magic);
 446         memory = NULL;
 447         width = height = originx = originy = pitch = 0;
 448         user_memory = false;
 449         flipped = false;
 450         active_rshift = active_gshift = active_bshift = 255;
 451         set_palette(magic[0], magic[1], magic[2]);
 452 }
 453
 454 screen::~screen() throw()
 455 {
 456         if(memory && !user_memory)
 457                 delete[] memory;
 458 }
 459
 460 void screen::set_palette(uint32_t rshift, uint32_t gshift, uint32_t bshift) throw()
 461 {
 462         if(rshift == active_rshift && gshift == active_gshift && bshift == active_bshift)
 463                 return;
 464         uint32_t old_rshift = active_rshift;
 465         uint32_t old_gshift = active_gshift;
 466         uint32_t old_bshift = active_bshift;
 467         uint32_t xpalette[32];
 468         for(unsigned i = 0; i < 32; i++)
 469                 xpalette[i] = (i * 255 / 31);
 470         for(unsigned i = 0; i < 32768; i++) {
 471                 palette[i] = (xpalette[(i >> 10) & 31] << rshift) +
 472                         (xpalette[(i >> 5) & 31] << gshift) +
 473                         (xpalette[i & 31] << bshift);
 474         }
 475         active_rshift = rshift;
 476         active_gshift = gshift;
 477         active_bshift = bshift;
 478         //Convert the data.
 479         for(uint32_t j = 0; j < height; j++) {
 480                 uint32_t* rp = rowptr(j);
 481                 for(uint32_t i = 0; i < width; i++) {
 482                         uint32_t x = rp[i];
 483                         uint32_t r = (x >> old_rshift) & 0xFF;
 484                         uint32_t g = (x >> old_gshift) & 0xFF;
 485                         uint32_t b = (x >> old_bshift) & 0xFF;
 486                         x = (r << active_rshift) | (g << active_gshift) | (b << active_bshift);
 487                         rp[i] = x;
 488                 }
 489         }
 490 }