generic/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         //This is Jenkin's MIX function.
  33         uint32_t keyhash(uint32_t key, uint32_t item, uint32_t mod) throw()
  34         {
  35                 uint32_t a = key;
  36                 uint32_t b = 0;
  37                 uint32_t c = item;
  38                 a=a-b;  a=a-c;  a=a^(c >> 13);
  39                 b=b-c;  b=b-a;  b=b^(a << 8);
  40                 c=c-a;  c=c-b;  c=c^(b >> 13);
  41                 a=a-b;  a=a-c;  a=a^(c >> 12);
  42                 b=b-c;  b=b-a;  b=b^(a << 16);
  43                 c=c-a;  c=c-b;  c=c^(b >> 5);
  44                 a=a-b;  a=a-c;  a=a^(c >> 3);
  45                 b=b-c;  b=b-a;  b=b^(a << 10);
  46                 c=c-a;  c=c-b;  c=c^(b >> 15);
  47                 return c % mod;
  48         }
  49 }
  50
  51 //Locate glyph in font. Returns <width, offset> pair. Zero offset should be interpretted as an empty
  52 //glyph.
  53 std::pair<uint32_t, size_t> find_glyph(uint32_t codepoint, int32_t x, int32_t y, int32_t orig_x,
  54         int32_t& next_x, int32_t& next_y) throw()
  55 {
  56         uint32_t cwidth = 0;
  57         if(codepoint == 9) {
  58                 cwidth = 64 - (x - orig_x) % 64;
  59                 next_x = x + cwidth;
  60                 next_y = y;
  61                 return std::make_pair(cwidth, 0);
  62         } else if(codepoint == 10) {
  63                 next_x = orig_x;
  64                 next_y = y + 16;
  65                 return std::make_pair(0, 0);
  66         } else if(codepoint == 32) {
  67                 next_x = x + 8;
  68                 next_y = y;
  69                 return std::make_pair(8, 0);
  70         } else {
  71                 uint32_t mdir = fontdata[0];
  72                 uint32_t mseed = fontdata[mdir];
  73                 uint32_t msize = fontdata[mdir + 1];
  74                 uint32_t midx = keyhash(mseed, codepoint, msize);
  75                 uint32_t sdir = fontdata[mdir + 2 + midx];
  76                 if(!fontdata[sdir + 1]) {
  77                         //Character not found.
  78                         next_x = x + 8;
  79                         next_y = y;
  80                         return std::make_pair(8, 0);
  81                 }
  82                 uint32_t sseed = fontdata[sdir];
  83                 uint32_t ssize = fontdata[sdir + 1];
  84                 uint32_t sidx = keyhash(sseed, codepoint, ssize);
  85                 if(fontdata[sdir + 2 + 2 * sidx] != codepoint) {
  86                         //Character not found.
  87                         next_x = x + 8;
  88                         next_y = y;
  89                         return std::make_pair(8, 0);
  90                 }
  91                 bool wide = (fontdata[fontdata[sdir + 2 + 2 * sidx + 1]] != 0);
  92                 next_x = x + (wide ? 16 : 8);
  93                 next_y = y;
  94                 return std::make_pair(wide ? 16 : 8, fontdata[sdir + 2 + 2 * sidx + 1] + 1);
  95         }
  96 }
  97
  98 render_object::~render_object() throw()
  99 {
 100 }
 101
 102 void render_text(struct screen& scr, int32_t x, int32_t y, const std::string& text, premultiplied_color fg,
 103         premultiplied_color bg) throw(std::bad_alloc)
 104 {
 105         int32_t orig_x = x;
 106         uint32_t unicode_code = 0;
 107         uint8_t unicode_left = 0;
 108         for(size_t i = 0; i < text.length(); i++) {
 109                 uint8_t ch = text[i];
 110                 if(ch < 128)
 111                         unicode_code = text[i];
 112                 else if(ch < 192) {
 113                                 if(!unicode_left)
 114                                         continue;
 115                                 unicode_code = 64 * unicode_code + ch - 128;
 116                                 if(--unicode_left)
 117                                         continue;
 118                 } else if(ch < 224) {
 119                         unicode_code = ch - 192;
 120                         unicode_left = 1;
 121                         continue;
 122                 } else if(ch < 240) {
 123                         unicode_code = ch - 224;
 124                         unicode_left = 2;
 125                         continue;
 126                 } else if(ch < 248) {
 127                         unicode_code = ch - 240;
 128                         unicode_left = 3;
 129                         continue;
 130                 } else
 131                         continue;
 132                 int32_t next_x, next_y;
 133                 auto p = find_glyph(unicode_code, x, y, orig_x, next_x, next_y);
 134                 uint32_t dx = 0;
 135                 uint32_t dw = p.first;
 136                 uint32_t dy = 0;
 137                 uint32_t dh = 16;
 138                 uint32_t cx = static_cast<uint32_t>(static_cast<int32_t>(scr.originx) + x);
 139                 uint32_t cy = static_cast<uint32_t>(static_cast<int32_t>(scr.originy) + y);
 140                 while(cx > scr.width && dw > 0) {
 141                         dx++;
 142                         dw--;
 143                         cx++;
 144                 }
 145                 while(cy > scr.height && dh > 0) {
 146                         dy++;
 147                         dh--;
 148                         cy++;
 149                 }
 150                 while(cx + dw > scr.width && dw > 0)
 151                         dw--;
 152                 while(cy + dh > scr.height && dh > 0)
 153                         dh--;
 154                 if(!dw || !dh)
 155                         continue;       //Outside screen.
 156
 157                 if(p.second == 0) {
 158                         //Blank glyph.
 159                         for(uint32_t j = 0; j < dh; j++) {
 160                                 uint16_t* base = scr.rowptr(cy + j) + cx;
 161                                 for(uint32_t i = 0; i < dw; i++)
 162                                         bg.apply(base[i]);
 163                         }
 164                 } else {
 165                         //narrow/wide glyph.
 166                         for(uint32_t j = 0; j < dh; j++) {
 167                                 uint32_t dataword = fontdata[p.second + (dy + j) / (32 / p.first)];
 168                                 uint16_t* base = scr.rowptr(cy + j) + cx;
 169                                 for(uint32_t i = 0; i < dw; i++)
 170                                         if(((dataword >> (31 - ((dy + j) % (32 / p.first)) * p.first - (dx + i))) & 1))
 171                                                 fg.apply(base[i]);
 172                                         else
 173                                                 bg.apply(base[i]);
 174                         }
 175                 }
 176                 x = next_x;
 177                 y = next_y;
 178         }
 179 }
 180
 181 void render_queue::add(struct render_object& obj) throw(std::bad_alloc)
 182 {
 183         q.push_back(&obj);
 184 }
 185
 186 void render_queue::run(struct screen& scr) throw()
 187 {
 188         for(auto i = q.begin(); i != q.end(); i++) {
 189                 try {
 190                         (**i)(scr);
 191                 } catch(...) {
 192                 }
 193                 delete *i;
 194         }
 195         q.clear();
 196 }
 197
 198 void render_queue::clear() throw()
 199 {
 200         for(auto i = q.begin(); i != q.end(); i++)
 201                 delete *i;
 202         q.clear();
 203 }
 204
 205 render_queue::~render_queue() throw()
 206 {
 207         clear();
 208 }
 209
 210 uint16_t screen::make_color(uint8_t r, uint8_t g, uint8_t b) throw()
 211 {
 212         uint16_t _r = r / 8;
 213         uint16_t _g = g / 8;
 214         uint16_t _b = b / 8;
 215         return (_r << 10) + (_g << 5) + _b;
 216 }
 217
 218 lcscreen::lcscreen(const uint16_t* mem, bool hires, bool interlace, bool overscan, bool region) throw()
 219 {
 220         uint32_t dataoffset = 0;
 221         width = hires ? 512 : 256;
 222         height = 0;
 223         if(region) {
 224                 //PAL.
 225                 height = 239;
 226                 dataoffset = overscan ? 9 : 1;
 227         } else {
 228                 //presumably NTSC.
 229                 height = 224;
 230                 dataoffset = overscan ? 16 : 9;
 231         }
 232         if(interlace)
 233                 height <<= 1;
 234         memory = mem + dataoffset * 1024;
 235         pitch = interlace ? 512 : 1024;
 236         user_memory = false;
 237 }
 238
 239 lcscreen::lcscreen(const uint16_t* mem, uint32_t _width, uint32_t _height) throw()
 240 {
 241         width = _width;
 242         height = _height;
 243         memory = mem;
 244         pitch = width;
 245         user_memory = false;
 246 }
 247
 248 lcscreen::lcscreen() throw()
 249 {
 250         width = 0;
 251         height = 0;
 252         memory = NULL;
 253         user_memory = true;
 254         pitch = 0;
 255         allocated = 0;
 256 }
 257
 258 lcscreen::lcscreen(const lcscreen& ls) throw(std::bad_alloc)
 259 {
 260         width = ls.width;
 261         height = ls.height;
 262         pitch = width;
 263         user_memory = true;
 264         allocated = static_cast<size_t>(width) * height;
 265         memory = new uint16_t[allocated];
 266         for(size_t l = 0; l < height; l++)
 267                 memcpy(const_cast<uint16_t*>(memory + l * width), ls.memory + l * ls.pitch, 2 * width);
 268 }
 269
 270 lcscreen& lcscreen::operator=(const lcscreen& ls) throw(std::bad_alloc, std::runtime_error)
 271 {
 272         if(!user_memory)
 273                 throw std::runtime_error("Can't copy to non-user memory");
 274         if(this == &ls)
 275                 return *this;
 276         if(allocated < static_cast<size_t>(ls.width) * ls.height) {
 277                 size_t p_allocated = static_cast<size_t>(ls.width) * ls.height;
 278                 memory = new uint16_t[p_allocated];
 279                 allocated = p_allocated;
 280         }
 281         width = ls.width;
 282         height = ls.height;
 283         pitch = width;
 284         for(size_t l = 0; l < height; l++)
 285                 memcpy(const_cast<uint16_t*>(memory + l * width), ls.memory + l * ls.pitch, 2 * width);
 286         return *this;
 287 }
 288
 289 lcscreen::~lcscreen()
 290 {
 291         if(user_memory)
 292                 delete[] const_cast<uint16_t*>(memory);
 293 }
 294
 295 void lcscreen::load(const std::vector<char>& data) throw(std::bad_alloc, std::runtime_error)
 296 {
 297         if(!user_memory)
 298                 throw std::runtime_error("Can't load to non-user memory");
 299         const uint8_t* data2 = reinterpret_cast<const uint8_t*>(&data[0]);
 300         if(data.size() < 2)
 301                 throw std::runtime_error("Corrupt saved screenshot data");
 302         uint32_t _width = static_cast<uint32_t>(data2[0]) * 256 + static_cast<uint32_t>(data2[1]);
 303         if(_width > 1 && data.size() % (2 * _width) != 2)
 304                 throw std::runtime_error("Corrupt saved screenshot data");
 305         uint32_t _height = (data.size() - 2) / (2 * _width);
 306         if(allocated < static_cast<size_t>(_width) * _height) {
 307                 size_t p_allocated = static_cast<size_t>(_width) * _height;
 308                 memory = new uint16_t[p_allocated];
 309                 allocated = p_allocated;
 310         }
 311         uint16_t* mem = const_cast<uint16_t*>(memory);
 312         width = _width;
 313         height = _height;
 314         pitch = width;
 315         for(size_t i = 0; i < (data.size() - 2) / 2; i++)
 316                 mem[i] = static_cast<uint16_t>(data2[2 + 2 * i]) * 256 +
 317                         static_cast<uint16_t>(data2[2 + 2 * i + 1]);
 318 }
 319
 320 void lcscreen::save(std::vector<char>& data) throw(std::bad_alloc)
 321 {
 322         data.resize(2 + 2 * static_cast<size_t>(width) * height);
 323         uint8_t* data2 = reinterpret_cast<uint8_t*>(&data[0]);
 324         data2[0] = (width >> 8);
 325         data2[1] = width;
 326         for(size_t i = 0; i < (data.size() - 2) / 2; i++) {
 327                 data[2 + 2 * i] = memory[(i / width) * pitch + (i % width)] >> 8;
 328                 data[2 + 2 * i + 1] = memory[(i / width) * pitch + (i % width)];
 329         }
 330 }
 331
 332 void lcscreen::save_png(const std::string& file) throw(std::bad_alloc, std::runtime_error)
 333 {
 334         unsigned char clevels[32];
 335         for(unsigned i = 0; i < 32; i++)
 336                 clevels[i] = 255 * i / 31;
 337         uint8_t* buffer = new uint8_t[3 * static_cast<size_t>(width) * height];
 338         for(uint32_t j = 0; j < height; j++)
 339                 for(uint32_t i = 0; i < width; i++) {
 340                         uint16_t word = memory[pitch * j + i];
 341                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 0] = clevels[(word >> 10) & 0x1F];
 342                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 1] = clevels[(word >> 5) & 0x1F];
 343                         buffer[3 * static_cast<size_t>(width) * j + 3 * i + 2] = clevels[(word) & 0x1F];
 344                 }
 345         try {
 346                 save_png_data(file, buffer, width, height);
 347                 delete[] buffer;
 348         } catch(...) {
 349                 delete[] buffer;
 350                 throw;
 351         }
 352 }
 353
 354 void screen::copy_from(lcscreen& scr, uint32_t hscale, uint32_t vscale) throw()
 355 {
 356         uint32_t copyable_width = (width - originx) / hscale;
 357         uint32_t copyable_height = (height - originy) / vscale;
 358         copyable_width = (copyable_width > scr.width) ? scr.width : copyable_width;
 359         copyable_height = (copyable_height > scr.height) ? scr.height : copyable_height;
 360         for(uint32_t y = 0; y < height; y++) {
 361                 memset(rowptr(y), 0, 2 * width);
 362         }
 363         for(uint32_t y = 0; y < copyable_height; y++) {
 364                 uint32_t line = y * vscale + originy;
 365                 uint16_t* ptr = rowptr(line) + originx;
 366                 const uint16_t* sbase = scr.memory + y * scr.pitch;
 367                 for(uint32_t x = 0; x < copyable_width; x++) {
 368                         uint16_t c = sbase[x] % 32768;
 369                         for(uint32_t i = 0; i < hscale; i++)
 370                                 *(ptr++) = c;
 371                 }
 372                 for(uint32_t j = 1; j < vscale; j++)
 373                         memcpy(rowptr(line + j) + originx, rowptr(line) + originx, 2 * hscale * copyable_width);
 374         }
 375 }
 376
 377 void screen::reallocate(uint32_t _width, uint32_t _height, uint32_t _originx, uint32_t _originy, bool upside_down)
 378         throw(std::bad_alloc)
 379 {
 380         if(_width == width && _height == height) {
 381                 originx = _originx;
 382                 originy = _originy;
 383                 return;
 384         }
 385         if(!_width || !_height) {
 386                 width = height = originx = originy = pitch = 0;
 387                 if(memory && !user_memory)
 388                         delete[] memory;
 389                 memory = NULL;
 390                 user_memory = false;
 391                 flipped = upside_down;
 392                 return;
 393         }
 394         uint16_t* newmem = new uint16_t[_width * _height];
 395         width = _width;
 396         height = _height;
 397         originx = _originx;
 398         originy = _originy;
 399         pitch = 2 * _width;
 400         if(memory && !user_memory)
 401                 delete[] memory;
 402         memory = newmem;
 403         user_memory = false;
 404         flipped = upside_down;
 405 }
 406
 407 void screen::set(uint16_t* _memory, uint32_t _width, uint32_t _height, uint32_t _originx, uint32_t _originy,
 408         uint32_t _pitch) throw()
 409 {
 410         if(memory && !user_memory)
 411                 delete[] memory;
 412         width = _width;
 413         height = _height;
 414         originx = _originx;
 415         originy = _originy;
 416         pitch = _pitch;
 417         user_memory = true;
 418         memory = _memory;
 419         flipped = false;
 420 }
 421
 422 uint16_t* screen::rowptr(uint32_t row) throw()
 423 {
 424         if(flipped)
 425                 row = height - row - 1;
 426         return reinterpret_cast<uint16_t*>(reinterpret_cast<uint8_t*>(memory) + row * pitch);
 427 }
 428
 429 screen::screen() throw()
 430 {
 431         memory = NULL;
 432         width = height = originx = originy = pitch = 0;
 433         user_memory = false;
 434         flipped = false;
 435 }
 436
 437 screen::~screen() throw()
 438 {
 439         if(memory && !user_memory)
 440                 delete[] memory;
 441 }
 442
 443 void clip_range(uint32_t origin, uint32_t size, int32_t base, int32_t& minc, int32_t& maxc) throw()
 444 {
 445         int64_t _origin = origin;
 446         int64_t _size = size;
 447         int64_t _base = base;
 448         int64_t _minc = minc;
 449         int64_t _maxc = maxc;
 450         int64_t mincoordinate = _base + _origin + _minc;
 451         int64_t maxcoordinate = _base + _origin + _maxc;
 452         if(mincoordinate < 0)
 453                 _minc = _minc - mincoordinate;
 454         if(maxcoordinate > _size)
 455                 _maxc = _maxc - (maxcoordinate - _size);
 456         if(_minc >= maxc) {
 457                 minc = 0;
 458                 maxc = 0;
 459         } else {
 460                 minc = _minc;
 461                 maxc = _maxc;
 462         }
 463 }