/* $Id$ */ /* * This file is part of OpenTTD. * 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. * 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. * 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/>. */ /** @file screenshot.cpp The creation of screenshots! */ #include "stdafx.h" #include "fileio_func.h" #include "viewport_func.h" #include "gfx_func.h" #include "screenshot.h" #include "blitter/factory.hpp" #include "zoom_func.h" #include "core/endian_func.hpp" #include "saveload/saveload.h" #include "company_func.h" #include "strings_func.h" #include "error.h" #include "window_gui.h" #include "window_func.h" #include "tile_map.h" #include "table/strings.h" static const char * const SCREENSHOT_NAME = "screenshot"; ///< Default filename of a saved screenshot. static const char * const HEIGHTMAP_NAME = "heightmap"; ///< Default filename of a saved heightmap. char _screenshot_format_name[8]; ///< Extension of the current screenshot format (corresponds with #_cur_screenshot_format). uint _num_screenshot_formats; ///< Number of available screenshot formats. uint _cur_screenshot_format; ///< Index of the currently selected screenshot format in #_screenshot_formats. static char _screenshot_name[128]; ///< Filename of the screenshot file. char _full_screenshot_name[MAX_PATH]; ///< Pathname of the screenshot file. /** * Callback function signature for generating lines of pixel data to be written to the screenshot file. * @param userdata Pointer to user data. * @param buf Destination buffer. * @param y Line number of the first line to write. * @param pitch Number of pixels to write (1 byte for 8bpp, 4 bytes for 32bpp). @see Colour * @param n Number of lines to write. */ typedef void ScreenshotCallback(void *userdata, void *buf, uint y, uint pitch, uint n); /** * Function signature for a screenshot generation routine for one of the available formats. * @param name Filename, including extension. * @param callb Callback function for generating lines of pixels. * @param userdata User data, passed on to #callb. * @param w Width of the image in pixels. * @param h Height of the image in pixels. * @param pixelformat Bits per pixel (bpp), either 8 or 32. * @param palette %Colour palette (for 8bpp images). * @return File was written successfully. */ typedef bool ScreenshotHandlerProc(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette); /** Screenshot format information. */ struct ScreenshotFormat { const char *name; ///< Name of the format. const char *extension; ///< File extension. ScreenshotHandlerProc *proc; ///< Function for writing the screenshot. bool supports_32bpp; ///< Does this format support 32bpp images? }; /************************************************* **** SCREENSHOT CODE FOR WINDOWS BITMAP (.BMP) *************************************************/ #if defined(_MSC_VER) || defined(__WATCOMC__) #pragma pack(push, 1) #endif /** BMP File Header (stored in little endian) */ struct BitmapFileHeader { uint16 type; uint32 size; uint32 reserved; uint32 off_bits; } GCC_PACK; assert_compile(sizeof(BitmapFileHeader) == 14); #if defined(_MSC_VER) || defined(__WATCOMC__) #pragma pack(pop) #endif /** BMP Info Header (stored in little endian) */ struct BitmapInfoHeader { uint32 size; int32 width, height; uint16 planes, bitcount; uint32 compression, sizeimage, xpels, ypels, clrused, clrimp; }; assert_compile(sizeof(BitmapInfoHeader) == 40); /** Format of palette data in BMP header */ struct RgbQuad { byte blue, green, red, reserved; }; assert_compile(sizeof(RgbQuad) == 4); /** * Generic .BMP writer * @param name file name including extension * @param callb callback used for gathering rendered image * @param userdata parameters forwarded to #callb * @param w width in pixels * @param h height in pixels * @param pixelformat bits per pixel * @param palette colour palette (for 8bpp mode) * @return was everything ok? * @see ScreenshotHandlerProc */ static bool MakeBMPImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette) { uint bpp; // bytes per pixel switch (pixelformat) { case 8: bpp = 1; break; /* 32bpp mode is saved as 24bpp BMP */ case 32: bpp = 3; break; /* Only implemented for 8bit and 32bit images so far */ default: return false; } FILE *f = fopen(name, "wb"); if (f == NULL) return false; /* Each scanline must be aligned on a 32bit boundary */ uint bytewidth = Align(w * bpp, 4); // bytes per line in file /* Size of palette. Only present for 8bpp mode */ uint pal_size = pixelformat == 8 ? sizeof(RgbQuad) * 256 : 0; /* Setup the file header */ BitmapFileHeader bfh; bfh.type = TO_LE16('MB'); bfh.size = TO_LE32(sizeof(BitmapFileHeader) + sizeof(BitmapInfoHeader) + pal_size + bytewidth * h); bfh.reserved = 0; bfh.off_bits = TO_LE32(sizeof(BitmapFileHeader) + sizeof(BitmapInfoHeader) + pal_size); /* Setup the info header */ BitmapInfoHeader bih; bih.size = TO_LE32(sizeof(BitmapInfoHeader)); bih.width = TO_LE32(w); bih.height = TO_LE32(h); bih.planes = TO_LE16(1); bih.bitcount = TO_LE16(bpp * 8); bih.compression = 0; bih.sizeimage = 0; bih.xpels = 0; bih.ypels = 0; bih.clrused = 0; bih.clrimp = 0; /* Write file header and info header */ if (fwrite(&bfh, sizeof(bfh), 1, f) != 1 || fwrite(&bih, sizeof(bih), 1, f) != 1) { fclose(f); return false; } if (pixelformat == 8) { /* Convert the palette to the windows format */ RgbQuad rq[256]; for (uint i = 0; i < 256; i++) { rq[i].red = palette[i].r; rq[i].green = palette[i].g; rq[i].blue = palette[i].b; rq[i].reserved = 0; } /* Write the palette */ if (fwrite(rq, sizeof(rq), 1, f) != 1) { fclose(f); return false; } } /* Try to use 64k of memory, store between 16 and 128 lines */ uint maxlines = Clamp(65536 / (w * pixelformat / 8), 16, 128); // number of lines per iteration uint8 *buff = MallocT<uint8>(maxlines * w * pixelformat / 8); // buffer which is rendered to uint8 *line = AllocaM(uint8, bytewidth); // one line, stored to file memset(line, 0, bytewidth); /* Start at the bottom, since bitmaps are stored bottom up */ do { uint n = min(h, maxlines); h -= n; /* Render the pixels */ callb(userdata, buff, h, w, n); /* Write each line */ while (n-- != 0) { if (pixelformat == 8) { /* Move to 'line', leave last few pixels in line zeroed */ memcpy(line, buff + n * w, w); } else { /* Convert from 'native' 32bpp to BMP-like 24bpp. * Works for both big and little endian machines */ Colour *src = ((Colour *)buff) + n * w; byte *dst = line; for (uint i = 0; i < w; i++) { dst[i * 3 ] = src[i].b; dst[i * 3 + 1] = src[i].g; dst[i * 3 + 2] = src[i].r; } } /* Write to file */ if (fwrite(line, bytewidth, 1, f) != 1) { free(buff); fclose(f); return false; } } } while (h != 0); free(buff); fclose(f); return true; } /********************************************************* **** SCREENSHOT CODE FOR PORTABLE NETWORK GRAPHICS (.PNG) *********************************************************/ #if defined(WITH_PNG) #include <png.h> #ifdef PNG_TEXT_SUPPORTED #include "rev.h" #include "newgrf_config.h" #include "ai/ai_info.hpp" #include "company_base.h" #include "base_media_base.h" #endif /* PNG_TEXT_SUPPORTED */ static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message) { DEBUG(misc, 0, "[libpng] error: %s - %s", message, (const char *)png_get_error_ptr(png_ptr)); longjmp(png_jmpbuf(png_ptr), 1); } static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message) { DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (const char *)png_get_error_ptr(png_ptr)); } /** * Generic .PNG file image writer. * @param name Filename, including extension. * @param callb Callback function for generating lines of pixels. * @param userdata User data, passed on to #callb. * @param w Width of the image in pixels. * @param h Height of the image in pixels. * @param pixelformat Bits per pixel (bpp), either 8 or 32. * @param palette %Colour palette (for 8bpp images). * @return File was written successfully. * @see ScreenshotHandlerProc */ static bool MakePNGImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette) { png_color rq[256]; FILE *f; uint i, y, n; uint maxlines; uint bpp = pixelformat / 8; png_structp png_ptr; png_infop info_ptr; /* only implemented for 8bit and 32bit images so far. */ if (pixelformat != 8 && pixelformat != 32) return false; f = fopen(name, "wb"); if (f == NULL) return false; png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, const_cast<char *>(name), png_my_error, png_my_warning); if (png_ptr == NULL) { fclose(f); return false; } info_ptr = png_create_info_struct(png_ptr); if (info_ptr == NULL) { png_destroy_write_struct(&png_ptr, (png_infopp)NULL); fclose(f); return false; } if (setjmp(png_jmpbuf(png_ptr))) { png_destroy_write_struct(&png_ptr, &info_ptr); fclose(f); return false; } png_init_io(png_ptr, f); png_set_filter(png_ptr, 0, PNG_FILTER_NONE); png_set_IHDR(png_ptr, info_ptr, w, h, 8, pixelformat == 8 ? PNG_COLOR_TYPE_PALETTE : PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); #ifdef PNG_TEXT_SUPPORTED /* Try to add some game metadata to the PNG screenshot so * it's more useful for debugging and archival purposes. */ png_text_struct text[2]; memset(text, 0, sizeof(text)); text[0].key = const_cast<char *>("Software"); text[0].text = const_cast<char *>(_openttd_revision); text[0].text_length = strlen(_openttd_revision); text[0].compression = PNG_TEXT_COMPRESSION_NONE; char buf[8192]; char *p = buf; p += seprintf(p, lastof(buf), "Graphics set: %s (%u)\n", BaseGraphics::GetUsedSet()->name, BaseGraphics::GetUsedSet()->version); p = strecpy(p, "NewGRFs:\n", lastof(buf)); for (const GRFConfig *c = _game_mode == GM_MENU ? NULL : _grfconfig; c != NULL; c = c->next) { p += seprintf(p, lastof(buf), "%08X ", BSWAP32(c->ident.grfid)); p = md5sumToString(p, lastof(buf), c->ident.md5sum); p += seprintf(p, lastof(buf), " %s\n", c->filename); } p = strecpy(p, "\nCompanies:\n", lastof(buf)); const Company *c; FOR_ALL_COMPANIES(c) { if (c->ai_info == NULL) { p += seprintf(p, lastof(buf), "%2i: Human\n", (int)c->index); } else { p += seprintf(p, lastof(buf), "%2i: %s (v%d)\n", (int)c->index, c->ai_info->GetName(), c->ai_info->GetVersion()); } } text[1].key = const_cast<char *>("Description"); text[1].text = buf; text[1].text_length = p - buf; text[1].compression = PNG_TEXT_COMPRESSION_zTXt; png_set_text(png_ptr, info_ptr, text, 2); #endif /* PNG_TEXT_SUPPORTED */ if (pixelformat == 8) { /* convert the palette to the .PNG format. */ for (i = 0; i != 256; i++) { rq[i].red = palette[i].r; rq[i].green = palette[i].g; rq[i].blue = palette[i].b; } png_set_PLTE(png_ptr, info_ptr, rq, 256); } png_write_info(png_ptr, info_ptr); png_set_flush(png_ptr, 512); if (pixelformat == 32) { png_color_8 sig_bit; /* Save exact colour/alpha resolution */ sig_bit.alpha = 0; sig_bit.blue = 8; sig_bit.green = 8; sig_bit.red = 8; sig_bit.gray = 8; png_set_sBIT(png_ptr, info_ptr, &sig_bit); #if TTD_ENDIAN == TTD_LITTLE_ENDIAN png_set_bgr(png_ptr); png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); #else png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); #endif /* TTD_ENDIAN == TTD_LITTLE_ENDIAN */ } /* use by default 64k temp memory */ maxlines = Clamp(65536 / w, 16, 128); /* now generate the bitmap bits */ void *buff = CallocT<uint8>(w * maxlines * bpp); // by default generate 128 lines at a time. y = 0; do { /* determine # lines to write */ n = min(h - y, maxlines); /* render the pixels into the buffer */ callb(userdata, buff, y, w, n); y += n; /* write them to png */ for (i = 0; i != n; i++) { png_write_row(png_ptr, (png_bytep)buff + i * w * bpp); } } while (y != h); png_write_end(png_ptr, info_ptr); png_destroy_write_struct(&png_ptr, &info_ptr); free(buff); fclose(f); return true; } #endif /* WITH_PNG */ /************************************************* **** SCREENSHOT CODE FOR ZSOFT PAINTBRUSH (.PCX) *************************************************/ /** Definition of a PCX file header. */ struct PcxHeader { byte manufacturer; byte version; byte rle; byte bpp; uint32 unused; uint16 xmax, ymax; uint16 hdpi, vdpi; byte pal_small[16 * 3]; byte reserved; byte planes; uint16 pitch; uint16 cpal; uint16 width; uint16 height; byte filler[54]; }; assert_compile(sizeof(PcxHeader) == 128); /** * Generic .PCX file image writer. * @param name Filename, including extension. * @param callb Callback function for generating lines of pixels. * @param userdata User data, passed on to #callb. * @param w Width of the image in pixels. * @param h Height of the image in pixels. * @param pixelformat Bits per pixel (bpp), either 8 or 32. * @param palette %Colour palette (for 8bpp images). * @return File was written successfully. * @see ScreenshotHandlerProc */ static bool MakePCXImage(const char *name, ScreenshotCallback *callb, void *userdata, uint w, uint h, int pixelformat, const Colour *palette) { FILE *f; uint maxlines; uint y; PcxHeader pcx; bool success; if (pixelformat == 32) { DEBUG(misc, 0, "Can't convert a 32bpp screenshot to PCX format. Please pick another format."); return false; } if (pixelformat != 8 || w == 0) return false; f = fopen(name, "wb"); if (f == NULL) return false; memset(&pcx, 0, sizeof(pcx)); /* setup pcx header */ pcx.manufacturer = 10; pcx.version = 5; pcx.rle = 1; pcx.bpp = 8; pcx.xmax = TO_LE16(w - 1); pcx.ymax = TO_LE16(h - 1); pcx.hdpi = TO_LE16(320); pcx.vdpi = TO_LE16(320); pcx.planes = 1; pcx.cpal = TO_LE16(1); pcx.width = pcx.pitch = TO_LE16(w); pcx.height = TO_LE16(h); /* write pcx header */ if (fwrite(&pcx, sizeof(pcx), 1, f) != 1) { fclose(f); return false; } /* use by default 64k temp memory */ maxlines = Clamp(65536 / w, 16, 128); /* now generate the bitmap bits */ uint8 *buff = CallocT<uint8>(w * maxlines); // by default generate 128 lines at a time. y = 0; do { /* determine # lines to write */ uint n = min(h - y, maxlines); uint i; /* render the pixels into the buffer */ callb(userdata, buff, y, w, n); y += n; /* write them to pcx */ for (i = 0; i != n; i++) { const uint8 *bufp = buff + i * w; byte runchar = bufp[0]; uint runcount = 1; uint j; /* for each pixel... */ for (j = 1; j < w; j++) { uint8 ch = bufp[j]; if (ch != runchar || runcount >= 0x3f) { if (runcount > 1 || (runchar & 0xC0) == 0xC0) { if (fputc(0xC0 | runcount, f) == EOF) { free(buff); fclose(f); return false; } } if (fputc(runchar, f) == EOF) { free(buff); fclose(f); return false; } runcount = 0; runchar = ch; } runcount++; } /* write remaining bytes.. */ if (runcount > 1 || (runchar & 0xC0) == 0xC0) { if (fputc(0xC0 | runcount, f) == EOF) { free(buff); fclose(f); return false; } } if (fputc(runchar, f) == EOF) { free(buff); fclose(f); return false; } } } while (y != h); free(buff); /* write 8-bit colour palette */ if (fputc(12, f) == EOF) { fclose(f); return false; } /* Palette is word-aligned, copy it to a temporary byte array */ byte tmp[256 * 3]; for (uint i = 0; i < 256; i++) { tmp[i * 3 + 0] = palette[i].r; tmp[i * 3 + 1] = palette[i].g; tmp[i * 3 + 2] = palette[i].b; } success = fwrite(tmp, sizeof(tmp), 1, f) == 1; fclose(f); return success; } /************************************************* **** GENERIC SCREENSHOT CODE *************************************************/ /** Available screenshot formats. */ static const ScreenshotFormat _screenshot_formats[] = { #if defined(WITH_PNG) {"PNG", "png", &MakePNGImage, true}, #endif {"BMP", "bmp", &MakeBMPImage, true}, {"PCX", "pcx", &MakePCXImage, false}, }; /** Get filename extension of current screenshot file format. */ const char *GetCurrentScreenshotExtension() { return _screenshot_formats[_cur_screenshot_format].extension; } /** Initialize screenshot format information on startup, with #_screenshot_format_name filled from the loadsave code. */ void InitializeScreenshotFormats() { uint j = 0; for (uint i = 0; i < lengthof(_screenshot_formats); i++) { if (!strcmp(_screenshot_format_name, _screenshot_formats[i].extension)) { j = i; break; } } _cur_screenshot_format = j; _num_screenshot_formats = lengthof(_screenshot_formats); } /** * Give descriptive name of the screenshot format. * @param i Number of the screenshot format. * @return String constant describing the format. */ const char *GetScreenshotFormatDesc(int i) { return _screenshot_formats[i].name; } /** * Determine whether a certain screenshot format support 32bpp images. * @param i Number of the screenshot format. * @return true if 32bpp is supported. */ bool GetScreenshotFormatSupports_32bpp(int i) { return _screenshot_formats[i].supports_32bpp; } /** * Set the screenshot format to use. * @param i Number of the format. */ void SetScreenshotFormat(uint i) { assert(i < _num_screenshot_formats); _cur_screenshot_format = i; strecpy(_screenshot_format_name, _screenshot_formats[i].extension, lastof(_screenshot_format_name)); } /** * Callback of the screenshot generator that dumps the current video buffer. * @see ScreenshotCallback */ static void CurrentScreenCallback(void *userdata, void *buf, uint y, uint pitch, uint n) { Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter(); void *src = blitter->MoveTo(_screen.dst_ptr, 0, y); blitter->CopyImageToBuffer(src, buf, _screen.width, n, pitch); } /** * generate a large piece of the world * @param userdata Viewport area to draw * @param buf Videobuffer with same bitdepth as current blitter * @param y First line to render * @param pitch Pitch of the videobuffer * @param n Number of lines to render */ static void LargeWorldCallback(void *userdata, void *buf, uint y, uint pitch, uint n) { ViewPort *vp = (ViewPort *)userdata; DrawPixelInfo dpi, *old_dpi; int wx, left; /* We are no longer rendering to the screen */ DrawPixelInfo old_screen = _screen; bool old_disable_anim = _screen_disable_anim; _screen.dst_ptr = buf; _screen.width = pitch; _screen.height = n; _screen.pitch = pitch; _screen_disable_anim = true; old_dpi = _cur_dpi; _cur_dpi = &dpi; dpi.dst_ptr = buf; dpi.height = n; dpi.width = vp->width; dpi.pitch = pitch; dpi.zoom = ZOOM_LVL_WORLD_SCREENSHOT; dpi.left = 0; dpi.top = y; /* Render viewport in blocks of 1600 pixels width */ left = 0; while (vp->width - left != 0) { wx = min(vp->width - left, 1600); left += wx; ViewportDoDraw(vp, ScaleByZoom(left - wx - vp->left, vp->zoom) + vp->virtual_left, ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top, ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left, ScaleByZoom((y + n) - vp->top, vp->zoom) + vp->virtual_top ); } _cur_dpi = old_dpi; /* Switch back to rendering to the screen */ _screen = old_screen; _screen_disable_anim = old_disable_anim; } /** * Construct a pathname for a screenshot file. * @param default_fn Default filename. * @param ext Extension to use. * @return Pathname for a screenshot file. */ static const char *MakeScreenshotName(const char *default_fn, const char *ext) { bool generate = StrEmpty(_screenshot_name); if (generate) { if (_game_mode == GM_EDITOR || _game_mode == GM_MENU || _local_company == COMPANY_SPECTATOR) { strecpy(_screenshot_name, default_fn, lastof(_screenshot_name)); } else { GenerateDefaultSaveName(_screenshot_name, lastof(_screenshot_name)); } } /* Add extension to screenshot file */ size_t len = strlen(_screenshot_name); snprintf(&_screenshot_name[len], lengthof(_screenshot_name) - len, ".%s", ext); for (uint serial = 1;; serial++) { if (snprintf(_full_screenshot_name, lengthof(_full_screenshot_name), "%s%s", _personal_dir, _screenshot_name) >= (int)lengthof(_full_screenshot_name)) { /* We need more characters than MAX_PATH -> end with error */ _full_screenshot_name[0] = '\0'; break; } if (!generate) break; // allow overwriting of non-automatic filenames if (!FileExists(_full_screenshot_name)) break; /* If file exists try another one with same name, but just with a higher index */ snprintf(&_screenshot_name[len], lengthof(_screenshot_name) - len, "#%u.%s", serial, ext); } return _full_screenshot_name; } /** Make a screenshot of the current screen. */ static bool MakeSmallScreenshot() { const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format; return sf->proc(MakeScreenshotName(SCREENSHOT_NAME, sf->extension), CurrentScreenCallback, NULL, _screen.width, _screen.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette.palette); } /** Make a zoomed-in screenshot of the currently visible area. */ static bool MakeZoomedInScreenshot(ZoomLevel zl) { Window *w = FindWindowById(WC_MAIN_WINDOW, 0); ViewPort vp; vp.zoom = zl; vp.left = w->viewport->left; vp.top = w->viewport->top; vp.virtual_left = w->viewport->virtual_left; vp.virtual_top = w->viewport->virtual_top; vp.virtual_width = w->viewport->virtual_width; vp.width = UnScaleByZoom(vp.virtual_width, vp.zoom); vp.virtual_height = w->viewport->virtual_height; vp.height = UnScaleByZoom(vp.virtual_height, vp.zoom); const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format; return sf->proc(MakeScreenshotName(SCREENSHOT_NAME, sf->extension), LargeWorldCallback, &vp, vp.width, vp.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette.palette); } /** Make a screenshot of the whole map. */ static bool MakeWorldScreenshot() { ViewPort vp; const ScreenshotFormat *sf; /* We need to account for a hill or high building at tile 0,0. */ int extra_height_top = TilePixelHeight(0) + 150; /* If there is a hill at the bottom don't create a large black area. */ int reclaim_height_bottom = TilePixelHeight(MapSize() - 1); vp.zoom = ZOOM_LVL_WORLD_SCREENSHOT; vp.left = 0; vp.top = 0; vp.virtual_left = -(int)MapMaxX() * TILE_PIXELS * ZOOM_LVL_BASE; vp.virtual_top = -extra_height_top * ZOOM_LVL_BASE; vp.virtual_width = (MapMaxX() + MapMaxY()) * TILE_PIXELS; vp.width = vp.virtual_width; vp.virtual_height = ((MapMaxX() + MapMaxY()) * TILE_PIXELS >> 1) + extra_height_top - reclaim_height_bottom; vp.height = vp.virtual_height; sf = _screenshot_formats + _cur_screenshot_format; return sf->proc(MakeScreenshotName(SCREENSHOT_NAME, sf->extension), LargeWorldCallback, &vp, vp.width, vp.height, BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth(), _cur_palette.palette); } /** * Callback for generating a heightmap. Supports 8bpp grayscale only. * @param userdata Pointer to user data. * @param buf Destination buffer. * @param y Line number of the first line to write. * @param pitch Number of pixels to write (1 byte for 8bpp, 4 bytes for 32bpp). @see Colour * @param n Number of lines to write. * @see ScreenshotCallback */ static void HeightmapCallback(void *userdata, void *buffer, uint y, uint pitch, uint n) { byte *buf = (byte *)buffer; while (n > 0) { TileIndex ti = TileXY(MapMaxX(), y); for (uint x = MapMaxX(); true; x--) { *buf = 16 * TileHeight(ti); buf++; if (x == 0) break; ti = TILE_ADDXY(ti, -1, 0); } y++; n--; } } /** * Make a heightmap of the current map. * @param filename Filename to use for saving. */ bool MakeHeightmapScreenshot(const char *filename) { Colour palette[256]; for (uint i = 0; i < lengthof(palette); i++) { palette[i].a = 0xff; palette[i].r = i; palette[i].g = i; palette[i].b = i; } const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format; return sf->proc(filename, HeightmapCallback, NULL, MapSizeX(), MapSizeY(), 8, palette); } /** * Make an actual screenshot. * @param t the type of screenshot to make. * @param name the name to give to the screenshot. * @return true iff the screenshow was made successfully */ bool MakeScreenshot(ScreenshotType t, const char *name) { if (t == SC_VIEWPORT) { /* First draw the dirty parts of the screen and only then change the name * of the screenshot. This way the screenshot will always show the name * of the previous screenshot in the 'successful' message instead of the * name of the new screenshot (or an empty name). */ UndrawMouseCursor(); DrawDirtyBlocks(); } _screenshot_name[0] = '\0'; if (name != NULL) strecpy(_screenshot_name, name, lastof(_screenshot_name)); bool ret; switch (t) { case SC_VIEWPORT: case SC_RAW: ret = MakeSmallScreenshot(); break; case SC_ZOOMEDIN: ret = MakeZoomedInScreenshot(_settings_client.gui.zoom_min); break; case SC_DEFAULTZOOM: ret = MakeZoomedInScreenshot(ZOOM_LVL_VIEWPORT); break; case SC_WORLD: ret = MakeWorldScreenshot(); break; case SC_HEIGHTMAP: { const ScreenshotFormat *sf = _screenshot_formats + _cur_screenshot_format; ret = MakeHeightmapScreenshot(MakeScreenshotName(HEIGHTMAP_NAME, sf->extension)); break; } default: NOT_REACHED(); } if (ret) { SetDParamStr(0, _screenshot_name); ShowErrorMessage(STR_MESSAGE_SCREENSHOT_SUCCESSFULLY, INVALID_STRING_ID, WL_WARNING); } else { ShowErrorMessage(STR_ERROR_SCREENSHOT_FAILED, INVALID_STRING_ID, WL_ERROR); } return ret; }