screenshot.cpp

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00001 /* $Id: screenshot.cpp 21890 2011-01-22 14:52:20Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "fileio_func.h"
00014 #include "viewport_func.h"
00015 #include "gfx_func.h"
00016 #include "screenshot.h"
00017 #include "blitter/factory.hpp"
00018 #include "zoom_func.h"
00019 #include "core/endian_func.hpp"
00020 #include "saveload/saveload.h"
00021 #include "company_func.h"
00022 #include "strings_func.h"
00023 #include "gui.h"
00024 #include "window_gui.h"
00025 #include "window_func.h"
00026 #include "tile_map.h"
00027 
00028 #include "table/strings.h"
00029 
00030 
00031 char _screenshot_format_name[8];
00032 uint _num_screenshot_formats;
00033 uint _cur_screenshot_format;
00034 static char _screenshot_name[128];
00035 char _full_screenshot_name[MAX_PATH];
00036 
00037 /* called by the ScreenShot proc to generate screenshot lines. */
00038 typedef void ScreenshotCallback(void *userdata, void *buf, uint y, uint pitch, uint n);
00039 typedef bool ScreenshotHandlerProc(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette);
00040 
00041 struct ScreenshotFormat {
00042   const char *name;
00043   const char *extension;
00044   ScreenshotHandlerProc *proc;
00045 };
00046 
00047 /*************************************************
00048  **** SCREENSHOT CODE FOR WINDOWS BITMAP (.BMP)
00049  *************************************************/
00050 #if defined(_MSC_VER) || defined(__WATCOMC__)
00051 #pragma pack(push, 1)
00052 #endif
00053 
00055 struct BitmapFileHeader {
00056   uint16 type;
00057   uint32 size;
00058   uint32 reserved;
00059   uint32 off_bits;
00060 } GCC_PACK;
00061 assert_compile(sizeof(BitmapFileHeader) == 14);
00062 
00063 #if defined(_MSC_VER) || defined(__WATCOMC__)
00064 #pragma pack(pop)
00065 #endif
00066 
00068 struct BitmapInfoHeader {
00069   uint32 size;
00070   int32 width, height;
00071   uint16 planes, bitcount;
00072   uint32 compression, sizeimage, xpels, ypels, clrused, clrimp;
00073 };
00074 assert_compile(sizeof(BitmapInfoHeader) == 40);
00075 
00077 struct RgbQuad {
00078   byte blue, green, red, reserved;
00079 };
00080 assert_compile(sizeof(RgbQuad) == 4);
00081 
00093 static bool MakeBMPImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette)
00094 {
00095   uint bpp; // bytes per pixel
00096   switch (pixelformat) {
00097     case 8:  bpp = 1; break;
00098     /* 32bpp mode is saved as 24bpp BMP */
00099     case 32: bpp = 3; break;
00100     /* Only implemented for 8bit and 32bit images so far */
00101     default: return false;
00102   }
00103 
00104   FILE *f = fopen(name, "wb");
00105   if (f == NULL) return false;
00106 
00107   /* Each scanline must be aligned on a 32bit boundary */
00108   uint bytewidth = Align(w * bpp, 4); // bytes per line in file
00109 
00110   /* Size of palette. Only present for 8bpp mode */
00111   uint pal_size = pixelformat == 8 ? sizeof(RgbQuad) * 256 : 0;
00112 
00113   /* Setup the file header */
00114   BitmapFileHeader bfh;
00115   bfh.type = TO_LE16('MB');
00116   bfh.size = TO_LE32(sizeof(BitmapFileHeader) + sizeof(BitmapInfoHeader) + pal_size + bytewidth * h);
00117   bfh.reserved = 0;
00118   bfh.off_bits = TO_LE32(sizeof(BitmapFileHeader) + sizeof(BitmapInfoHeader) + pal_size);
00119 
00120   /* Setup the info header */
00121   BitmapInfoHeader bih;
00122   bih.size = TO_LE32(sizeof(BitmapInfoHeader));
00123   bih.width = TO_LE32(w);
00124   bih.height = TO_LE32(h);
00125   bih.planes = TO_LE16(1);
00126   bih.bitcount = TO_LE16(bpp * 8);
00127   bih.compression = 0;
00128   bih.sizeimage = 0;
00129   bih.xpels = 0;
00130   bih.ypels = 0;
00131   bih.clrused = 0;
00132   bih.clrimp = 0;
00133 
00134   /* Write file header and info header */
00135   if (fwrite(&bfh, sizeof(bfh), 1, f) != 1 || fwrite(&bih, sizeof(bih), 1, f) != 1) {
00136     fclose(f);
00137     return false;
00138   }
00139 
00140   if (pixelformat == 8) {
00141     /* Convert the palette to the windows format */
00142     RgbQuad rq[256];
00143     for (uint i = 0; i < 256; i++) {
00144       rq[i].red   = palette[i].r;
00145       rq[i].green = palette[i].g;
00146       rq[i].blue  = palette[i].b;
00147       rq[i].reserved = 0;
00148     }
00149     /* Write the palette */
00150     if (fwrite(rq, sizeof(rq), 1, f) != 1) {
00151       fclose(f);
00152       return false;
00153     }
00154   }
00155 
00156   /* Try to use 64k of memory, store between 16 and 128 lines */
00157   uint maxlines = Clamp(65536 / (w * pixelformat / 8), 16, 128); // number of lines per iteration
00158 
00159   uint8 *buff = MallocT<uint8>(maxlines * w * pixelformat / 8); // buffer which is rendered to
00160   uint8 *line = AllocaM(uint8, bytewidth); // one line, stored to file
00161   memset(line, 0, bytewidth);
00162 
00163   /* Start at the bottom, since bitmaps are stored bottom up */
00164   do {
00165     uint n = min(h, maxlines);
00166     h -= n;
00167 
00168     /* Render the pixels */
00169     callb(userdata, buff, h, w, n);
00170 
00171     /* Write each line */
00172     while (n-- != 0) {
00173       if (pixelformat == 8) {
00174         /* Move to 'line', leave last few pixels in line zeroed */
00175         memcpy(line, buff + n * w, w);
00176       } else {
00177         /* Convert from 'native' 32bpp to BMP-like 24bpp.
00178          * Works for both big and little endian machines */
00179         Colour *src = ((Colour *)buff) + n * w;
00180         byte *dst = line;
00181         for (uint i = 0; i < w; i++) {
00182           dst[i * 3    ] = src[i].b;
00183           dst[i * 3 + 1] = src[i].g;
00184           dst[i * 3 + 2] = src[i].r;
00185         }
00186       }
00187       /* Write to file */
00188       if (fwrite(line, bytewidth, 1, f) != 1) {
00189         free(buff);
00190         fclose(f);
00191         return false;
00192       }
00193     }
00194   } while (h != 0);
00195 
00196   free(buff);
00197   fclose(f);
00198 
00199   return true;
00200 }
00201 
00202 /*********************************************************
00203  **** SCREENSHOT CODE FOR PORTABLE NETWORK GRAPHICS (.PNG)
00204  *********************************************************/
00205 #if defined(WITH_PNG)
00206 #include <png.h>
00207 
00208 #ifdef PNG_TEXT_SUPPORTED
00209 #include "rev.h"
00210 #include "newgrf_config.h"
00211 #include "ai/ai_info.hpp"
00212 #include "company_base.h"
00213 #include "base_media_base.h"
00214 #endif /* PNG_TEXT_SUPPORTED */
00215 
00216 static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
00217 {
00218   DEBUG(misc, 0, "[libpng] error: %s - %s", message, (const char *)png_get_error_ptr(png_ptr));
00219   longjmp(png_jmpbuf(png_ptr), 1);
00220 }
00221 
00222 static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message)
00223 {
00224   DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (const char *)png_get_error_ptr(png_ptr));
00225 }
00226 
00227 static bool MakePNGImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette)
00228 {
00229   png_color rq[256];
00230   FILE *f;
00231   uint i, y, n;
00232   uint maxlines;
00233   uint bpp = pixelformat / 8;
00234   png_structp png_ptr;
00235   png_infop info_ptr;
00236 
00237   /* only implemented for 8bit and 32bit images so far. */
00238   if (pixelformat != 8 && pixelformat != 32) return false;
00239 
00240   f = fopen(name, "wb");
00241   if (f == NULL) return false;
00242 
00243   png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (void *)name, png_my_error, png_my_warning);
00244 
00245   if (png_ptr == NULL) {
00246     fclose(f);
00247     return false;
00248   }
00249 
00250   info_ptr = png_create_info_struct(png_ptr);
00251   if (info_ptr == NULL) {
00252     png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
00253     fclose(f);
00254     return false;
00255   }
00256 
00257   if (setjmp(png_jmpbuf(png_ptr))) {
00258     png_destroy_write_struct(&png_ptr, &info_ptr);
00259     fclose(f);
00260     return false;
00261   }
00262 
00263   png_init_io(png_ptr, f);
00264 
00265   png_set_filter(png_ptr, 0, PNG_FILTER_NONE);
00266 
00267   png_set_IHDR(png_ptr, info_ptr, w, h, 8, pixelformat == 8 ? PNG_COLOR_TYPE_PALETTE : PNG_COLOR_TYPE_RGB,
00268     PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
00269 
00270 #ifdef PNG_TEXT_SUPPORTED
00271   /* Try to add some game metadata to the PNG screenshot so
00272    * it's more useful for debugging and archival purposes. */
00273   png_text_struct text[2];
00274   memset(text, 0, sizeof(text));
00275   text[0].key = const_cast<char *>("Software");
00276   text[0].text = const_cast<char *>(_openttd_revision);
00277   text[0].text_length = strlen(_openttd_revision);
00278   text[0].compression = PNG_TEXT_COMPRESSION_NONE;
00279 
00280   char buf[2048];
00281   char *p = buf;
00282   p += seprintf(p, lastof(buf), "Graphics set: %s (%u)\n", BaseGraphics::GetUsedSet()->name, BaseGraphics::GetUsedSet()->version);
00283   p = strecpy(p, "NewGRFs:\n", lastof(buf));
00284   for (const GRFConfig *c = _grfconfig; c != NULL; c = c->next) {
00285     p += seprintf(p, lastof(buf), "%08X ", BSWAP32(c->ident.grfid));
00286     p = md5sumToString(p, lastof(buf), c->ident.md5sum);
00287     p += seprintf(p, lastof(buf), " %s\n", c->filename);
00288   }
00289   p = strecpy(p, "\nCompanies:\n", lastof(buf));
00290   const Company *c;
00291   FOR_ALL_COMPANIES(c) {
00292     if (c->ai_info == NULL) {
00293       p += seprintf(p, lastof(buf), "%2i: Human\n", (int)c->index);
00294     } else {
00295 #ifdef ENABLE_AI
00296       p += seprintf(p, lastof(buf), "%2i: %s (v%d)\n", (int)c->index, c->ai_info->GetName(), c->ai_info->GetVersion());
00297 #endif /* ENABLE_AI */
00298     }
00299   }
00300   text[1].key = const_cast<char *>("Description");
00301   text[1].text = buf;
00302   text[1].text_length = p - buf;
00303   text[1].compression = PNG_TEXT_COMPRESSION_zTXt;
00304   png_set_text(png_ptr, info_ptr, text, 2);
00305 #endif /* PNG_TEXT_SUPPORTED */
00306 
00307   if (pixelformat == 8) {
00308     /* convert the palette to the .PNG format. */
00309     for (i = 0; i != 256; i++) {
00310       rq[i].red   = palette[i].r;
00311       rq[i].green = palette[i].g;
00312       rq[i].blue  = palette[i].b;
00313     }
00314 
00315     png_set_PLTE(png_ptr, info_ptr, rq, 256);
00316   }
00317 
00318   png_write_info(png_ptr, info_ptr);
00319   png_set_flush(png_ptr, 512);
00320 
00321   if (pixelformat == 32) {
00322     png_color_8 sig_bit;
00323 
00324     /* Save exact colour/alpha resolution */
00325     sig_bit.alpha = 0;
00326     sig_bit.blue  = 8;
00327     sig_bit.green = 8;
00328     sig_bit.red   = 8;
00329     sig_bit.gray  = 8;
00330     png_set_sBIT(png_ptr, info_ptr, &sig_bit);
00331 
00332 #if TTD_ENDIAN == TTD_LITTLE_ENDIAN
00333     png_set_bgr(png_ptr);
00334     png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
00335 #else
00336     png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
00337 #endif /* TTD_ENDIAN == TTD_LITTLE_ENDIAN */
00338   }
00339 
00340   /* use by default 64k temp memory */
00341   maxlines = Clamp(65536 / w, 16, 128);
00342 
00343   /* now generate the bitmap bits */
00344   void *buff = CallocT<uint8>(w * maxlines * bpp); // by default generate 128 lines at a time.
00345 
00346   y = 0;
00347   do {
00348     /* determine # lines to write */
00349     n = min(h - y, maxlines);
00350 
00351     /* render the pixels into the buffer */
00352     callb(userdata, buff, y, w, n);
00353     y += n;
00354 
00355     /* write them to png */
00356     for (i = 0; i != n; i++) {
00357       png_write_row(png_ptr, (png_bytep)buff + i * w * bpp);
00358     }
00359   } while (y != h);
00360 
00361   png_write_end(png_ptr, info_ptr);
00362   png_destroy_write_struct(&png_ptr, &info_ptr);
00363 
00364   free(buff);
00365   fclose(f);
00366   return true;
00367 }
00368 #endif /* WITH_PNG */
00369 
00370 
00371 /*************************************************
00372  **** SCREENSHOT CODE FOR ZSOFT PAINTBRUSH (.PCX)
00373  *************************************************/
00374 
00375 struct PcxHeader {
00376   byte manufacturer;
00377   byte version;
00378   byte rle;
00379   byte bpp;
00380   uint32 unused;
00381   uint16 xmax, ymax;
00382   uint16 hdpi, vdpi;
00383   byte pal_small[16 * 3];
00384   byte reserved;
00385   byte planes;
00386   uint16 pitch;
00387   uint16 cpal;
00388   uint16 width;
00389   uint16 height;
00390   byte filler[54];
00391 };
00392 assert_compile(sizeof(PcxHeader) == 128);
00393 
00394 static bool MakePCXImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette)
00395 {
00396   FILE *f;
00397   uint maxlines;
00398   uint y;
00399   PcxHeader pcx;
00400   bool success;
00401 
00402   if (pixelformat == 32) {
00403     DEBUG(misc, 0, "Can't convert a 32bpp screenshot to PCX format. Please pick another format.");
00404     return false;
00405   }
00406   if (pixelformat != 8 || w == 0) return false;
00407 
00408   f = fopen(name, "wb");
00409   if (f == NULL) return false;
00410 
00411   memset(&pcx, 0, sizeof(pcx));
00412 
00413   /* setup pcx header */
00414   pcx.manufacturer = 10;
00415   pcx.version = 5;
00416   pcx.rle = 1;
00417   pcx.bpp = 8;
00418   pcx.xmax = TO_LE16(w - 1);
00419   pcx.ymax = TO_LE16(h - 1);
00420   pcx.hdpi = TO_LE16(320);
00421   pcx.vdpi = TO_LE16(320);
00422 
00423   pcx.planes = 1;
00424   pcx.cpal = TO_LE16(1);
00425   pcx.width = pcx.pitch = TO_LE16(w);
00426   pcx.height = TO_LE16(h);
00427 
00428   /* write pcx header */
00429   if (fwrite(&pcx, sizeof(pcx), 1, f) != 1) {
00430     fclose(f);
00431     return false;
00432   }
00433 
00434   /* use by default 64k temp memory */
00435   maxlines = Clamp(65536 / w, 16, 128);
00436 
00437   /* now generate the bitmap bits */
00438   uint8 *buff = CallocT<uint8>(w * maxlines); // by default generate 128 lines at a time.
00439 
00440   y = 0;
00441   do {
00442     /* determine # lines to write */
00443     uint n = min(h - y, maxlines);
00444     uint i;
00445 
00446     /* render the pixels into the buffer */
00447     callb(userdata, buff, y, w, n);
00448     y += n;
00449 
00450     /* write them to pcx */
00451     for (i = 0; i != n; i++) {
00452       const uint8 *bufp = buff + i * w;
00453       byte runchar = bufp[0];
00454       uint runcount = 1;
00455       uint j;
00456 
00457       /* for each pixel... */
00458       for (j = 1; j < w; j++) {
00459         uint8 ch = bufp[j];
00460 
00461         if (ch != runchar || runcount >= 0x3f) {
00462           if (runcount > 1 || (runchar & 0xC0) == 0xC0) {
00463             if (fputc(0xC0 | runcount, f) == EOF) {
00464               free(buff);
00465               fclose(f);
00466               return false;
00467             }
00468           }
00469           if (fputc(runchar, f) == EOF) {
00470             free(buff);
00471             fclose(f);
00472             return false;
00473           }
00474           runcount = 0;
00475           runchar = ch;
00476         }
00477         runcount++;
00478       }
00479 
00480       /* write remaining bytes.. */
00481       if (runcount > 1 || (runchar & 0xC0) == 0xC0) {
00482         if (fputc(0xC0 | runcount, f) == EOF) {
00483           free(buff);
00484           fclose(f);
00485           return false;
00486         }
00487       }
00488       if (fputc(runchar, f) == EOF) {
00489         free(buff);
00490         fclose(f);
00491         return false;
00492       }
00493     }
00494   } while (y != h);
00495 
00496   free(buff);
00497 
00498   /* write 8-bit colour palette */
00499   if (fputc(12, f) == EOF) {
00500     fclose(f);
00501     return false;
00502   }
00503 
00504   /* Palette is word-aligned, copy it to a temporary byte array */
00505   byte tmp[256 * 3];
00506 
00507   for (uint i = 0; i < 256; i++) {
00508     tmp[i * 3 + 0] = palette[i].r;
00509     tmp[i * 3 + 1] = palette[i].g;
00510     tmp[i * 3 + 2] = palette[i].b;
00511   }
00512   success = fwrite(tmp, sizeof(tmp), 1, f) == 1;
00513 
00514   fclose(f);
00515 
00516   return success;
00517 }
00518 
00519 /*************************************************
00520  **** GENERIC SCREENSHOT CODE
00521  *************************************************/
00522 
00523 static const ScreenshotFormat _screenshot_formats[] = {
00524 #if defined(WITH_PNG)
00525   {"PNG", "png", &MakePNGImage},
00526 #endif
00527   {"BMP", "bmp", &MakeBMPImage},
00528   {"PCX", "pcx", &MakePCXImage},
00529 };
00530 
00531 void InitializeScreenshotFormats()
00532 {
00533   uint j = 0;
00534   for (uint i = 0; i < lengthof(_screenshot_formats); i++) {
00535     if (!strcmp(_screenshot_format_name, _screenshot_formats[i].extension)) {
00536       j = i;
00537       break;
00538     }
00539   }
00540   _cur_screenshot_format = j;
00541   _num_screenshot_formats = lengthof(_screenshot_formats);
00542 }
00543 
00544 const char *GetScreenshotFormatDesc(int i)
00545 {
00546   return _screenshot_formats[i].name;
00547 }
00548 
00549 void SetScreenshotFormat(uint i)
00550 {
00551   assert(i < _num_screenshot_formats);
00552   _cur_screenshot_format = i;
00553   strecpy(_screenshot_format_name, _screenshot_formats[i].extension, lastof(_screenshot_format_name));
00554 }
00555 
00556 /* screenshot generator that dumps the current video buffer */
00557 static void CurrentScreenCallback(void *userdata, void *buf, uint y, uint pitch, uint n)
00558 {
00559   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
00560   void *src = blitter->MoveTo(_screen.dst_ptr, 0, y);
00561   blitter->CopyImageToBuffer(src, buf, _screen.width, n, pitch);
00562 }
00563 
00572 static void LargeWorldCallback(void *userdata, void *buf, uint y, uint pitch, uint n)
00573 {
00574   ViewPort *vp = (ViewPort *)userdata;
00575   DrawPixelInfo dpi, *old_dpi;
00576   int wx, left;
00577 
00578   /* We are no longer rendering to the screen */
00579   DrawPixelInfo old_screen = _screen;
00580   bool old_disable_anim = _screen_disable_anim;
00581 
00582   _screen.dst_ptr = buf;
00583   _screen.width = pitch;
00584   _screen.height = n;
00585   _screen.pitch = pitch;
00586   _screen_disable_anim = true;
00587 
00588   old_dpi = _cur_dpi;
00589   _cur_dpi = &dpi;
00590 
00591   dpi.dst_ptr = buf;
00592   dpi.height = n;
00593   dpi.width = vp->width;
00594   dpi.pitch = pitch;
00595   dpi.zoom = ZOOM_LVL_WORLD_SCREENSHOT;
00596   dpi.left = 0;
00597   dpi.top = y;
00598 
00599   /* Render viewport in blocks of 1600 pixels width */
00600   left = 0;
00601   while (vp->width - left != 0) {
00602     wx = min(vp->width - left, 1600);
00603     left += wx;
00604 
00605     ViewportDoDraw(vp,
00606       ScaleByZoom(left - wx - vp->left, vp->zoom) + vp->virtual_left,
00607       ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top,
00608       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
00609       ScaleByZoom((y + n) - vp->top, vp->zoom) + vp->virtual_top
00610     );
00611   }
00612 
00613   _cur_dpi = old_dpi;
00614 
00615   /* Switch back to rendering to the screen */
00616   _screen = old_screen;
00617   _screen_disable_anim = old_disable_anim;
00618 }
00619 
00620 static const char *MakeScreenshotName(const char *ext)
00621 {
00622   bool generate = StrEmpty(_screenshot_name);
00623 
00624   if (generate) {
00625     if (_game_mode == GM_EDITOR || _game_mode == GM_MENU || _local_company == COMPANY_SPECTATOR) {
00626       strecpy(_screenshot_name, "screenshot", lastof(_screenshot_name));
00627     } else {
00628       GenerateDefaultSaveName(_screenshot_name, lastof(_screenshot_name));
00629     }
00630   }
00631 
00632   /* Add extension to screenshot file */
00633   size_t len = strlen(_screenshot_name);
00634   snprintf(&_screenshot_name[len], lengthof(_screenshot_name) - len, ".%s", ext);
00635 
00636   for (uint serial = 1;; serial++) {
00637     if (snprintf(_full_screenshot_name, lengthof(_full_screenshot_name), "%s%s", _personal_dir, _screenshot_name) >= (int)lengthof(_full_screenshot_name)) {
00638       /* We need more characters than MAX_PATH -> end with error */
00639       _full_screenshot_name[0] = '\0';
00640       break;
00641     }
00642     if (!generate) break; // allow overwriting of non-automatic filenames
00643     if (!FileExists(_full_screenshot_name)) break;
00644     /* If file exists try another one with same name, but just with a higher index */
00645     snprintf(&_screenshot_name[len], lengthof(_screenshot_name) - len, "#%u.%s", serial, ext);
00646   }
00647 
00648   return _full_screenshot_name;
00649 }
00650 
00652 static bool MakeSmallScreenshot()
00653 {
00654   const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format;
00655   return sf->proc(MakeScreenshotName(sf->extension), CurrentScreenCallback, NULL, _screen.width, _screen.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette);
00656 }
00657 
00659 static bool MakeZoomedInScreenshot()
00660 {
00661   Window *w = FindWindowById(WC_MAIN_WINDOW, 0);
00662   ViewPort vp;
00663 
00664   vp.zoom = ZOOM_LVL_WORLD_SCREENSHOT;
00665   vp.left = w->viewport->left;
00666   vp.top = w->viewport->top;
00667   vp.virtual_left = w->viewport->virtual_left;
00668   vp.virtual_top = w->viewport->virtual_top;
00669   vp.virtual_width = w->viewport->virtual_width;
00670   vp.width = vp.virtual_width;
00671   vp.virtual_height = w->viewport->virtual_height;
00672   vp.height = vp.virtual_height;
00673 
00674   const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format;
00675   return sf->proc(MakeScreenshotName(sf->extension), LargeWorldCallback, &vp, vp.width, vp.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette);
00676 }
00677 
00679 static bool MakeWorldScreenshot()
00680 {
00681   ViewPort vp;
00682   const ScreenshotFormat *sf;
00683 
00684   /* We need to account for a hill or high building at tile 0,0. */
00685   int extra_height_top = TileHeight(0) * TILE_HEIGHT + 150;
00686   /* If there is a hill at the bottom don't create a large black area. */
00687   int reclaim_height_bottom = TileHeight(MapSize() - 1) * TILE_HEIGHT;
00688 
00689   vp.zoom = ZOOM_LVL_WORLD_SCREENSHOT;
00690   vp.left = 0;
00691   vp.top = 0;
00692   vp.virtual_left = -(int)MapMaxX() * TILE_PIXELS;
00693   vp.virtual_top = -extra_height_top;
00694   vp.virtual_width = (MapMaxX() + MapMaxY()) * TILE_PIXELS;
00695   vp.width = vp.virtual_width;
00696   vp.virtual_height = ((MapMaxX() + MapMaxY()) * TILE_PIXELS >> 1) + extra_height_top - reclaim_height_bottom;
00697   vp.height = vp.virtual_height;
00698 
00699   sf = _screenshot_formats + _cur_screenshot_format;
00700   return sf->proc(MakeScreenshotName(sf->extension), LargeWorldCallback, &vp, vp.width, vp.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette);
00701 }
00702 
00709 bool MakeScreenshot(ScreenshotType t, const char *name)
00710 {
00711   if (t == SC_VIEWPORT) {
00712     /* First draw the dirty parts of the screen and only then change the name
00713      * of the screenshot. This way the screenshot will always show the name
00714      * of the previous screenshot in the 'successful' message instead of the
00715      * name of the new screenshot (or an empty name). */
00716     UndrawMouseCursor();
00717     DrawDirtyBlocks();
00718   }
00719 
00720   _screenshot_name[0] = '\0';
00721   if (name != NULL) strecpy(_screenshot_name, name, lastof(_screenshot_name));
00722 
00723   bool ret;
00724   switch (t) {
00725     case SC_VIEWPORT:
00726     case SC_RAW:
00727       ret = MakeSmallScreenshot();
00728       break;
00729 
00730     case SC_ZOOMEDIN:
00731       ret = MakeZoomedInScreenshot();
00732       break;
00733 
00734     case SC_WORLD:
00735       ret = MakeWorldScreenshot();
00736       break;
00737 
00738     default:
00739       NOT_REACHED();
00740   }
00741 
00742   if (ret) {
00743     SetDParamStr(0, _screenshot_name);
00744     ShowErrorMessage(STR_MESSAGE_SCREENSHOT_SUCCESSFULLY, INVALID_STRING_ID, WL_WARNING);
00745   } else {
00746     ShowErrorMessage(STR_ERROR_SCREENSHOT_FAILED, INVALID_STRING_ID, WL_ERROR);
00747   }
00748 
00749   return ret;
00750 }

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