# gfx.cpp

Go to the documentation of this file.

    00001 /* $Id: gfx.cpp 17987 2009-11-06 22:53:21Z rubidium $ */
    00002
    00005 #include "stdafx.h"
    00006 #include "openttd.h"
    00007 #include "gfx_func.h"
    00008 #include "variables.h"
    00009 #include "spritecache.h"
    00010 #include "fontcache.h"
    00011 #include "genworld.h"
    00012 #include "zoom_func.h"
    00013 #include "blitter/factory.hpp"
    00014 #include "video/video_driver.hpp"
    00015 #include "strings_func.h"
    00016 #include "settings_type.h"
    00017 #include "core/alloc_func.hpp"
    00018 #include "core/sort_func.hpp"
    00019 #include "landscape_type.h"
    00020 #include "network/network_func.h"
    00021 #include "thread.h"
    00022
    00023 #include "table/palettes.h"
    00024 #include "table/sprites.h"
    00025 #include "table/control_codes.h"
    00026
    00027 byte _dirkeys;
    00028 bool _fullscreen;
    00029 CursorVars _cursor;
    00030 bool _ctrl_pressed;
    00031 bool _shift_pressed;
    00032 byte _fast_forward;
    00033 bool _left_button_down;
    00034 bool _left_button_clicked;
    00035 bool _right_button_down;
    00036 bool _right_button_clicked;
    00037 DrawPixelInfo _screen;
    00038 bool _screen_disable_anim = false;
    00039 bool _exit_game;
    00040 GameMode _game_mode;
    00041 SwitchMode _switch_mode;
    00042 int8 _pause_game;
    00043 int _pal_first_dirty;
    00044 int _pal_count_dirty;
    00045
    00046 Colour _cur_palette[256];
    00047 byte _stringwidth_table[FS_END][224];
    00048 DrawPixelInfo *_cur_dpi;
    00049 byte _colour_gradient[COLOUR_END][8];
    00050
    00051 static void GfxMainBlitter(const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub = NULL);
    00052 static int ReallyDoDrawString(const char *string, int x, int y, TextColour colour, bool parse_string_also_when_clipped = false);
    00053
    00054 FontSize _cur_fontsize;
    00055 static FontSize _last_fontsize;
    00056 static ReusableBuffer<uint8> _cursor_backup;
    00057
    00065 static Rect _invalid_rect;
    00066 static const byte *_colour_remap_ptr;
    00067 static byte _string_colourremap[3];
    00068
    00069 enum {
    00070   DIRTY_BLOCK_HEIGHT   = 8,
    00071   DIRTY_BLOCK_WIDTH    = 64,
    00072 };
    00073 static uint _dirty_bytes_per_line = 0;
    00074 static byte *_dirty_blocks = NULL;
    00075
    00076 void GfxScroll(int left, int top, int width, int height, int xo, int yo)
    00077 {
    00078   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00079
    00080   if (xo == 0 && yo == 0) return;
    00081
    00082   if (_cursor.visible) UndrawMouseCursor();
    00083
    00084 #ifdef ENABLE_NETWORK
    00085   NetworkUndrawChatMessage();
    00086 #endif /* ENABLE_NETWORK */
    00087
    00088   blitter->ScrollBuffer(_screen.dst_ptr, left, top, width, height, xo, yo);
    00089   /* This part of the screen is now dirty. */
    00090   _video_driver->MakeDirty(left, top, width, height);
    00091 }
    00092
    00093
    00108 void GfxFillRect(int left, int top, int right, int bottom, int colour, FillRectMode mode)
    00109 {
    00110   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00111   const DrawPixelInfo *dpi = _cur_dpi;
    00112   void *dst;
    00113   const int otop = top;
    00114   const int oleft = left;
    00115
    00116   if (dpi->zoom != ZOOM_LVL_NORMAL) return;
    00117   if (left > right || top > bottom) return;
    00118   if (right < dpi->left || left >= dpi->left + dpi->width) return;
    00119   if (bottom < dpi->top || top >= dpi->top + dpi->height) return;
    00120
    00121   if ( (left -= dpi->left) < 0) left = 0;
    00122   right = right - dpi->left + 1;
    00123   if (right > dpi->width) right = dpi->width;
    00124   right -= left;
    00125   assert(right > 0);
    00126
    00127   if ( (top -= dpi->top) < 0) top = 0;
    00128   bottom = bottom - dpi->top + 1;
    00129   if (bottom > dpi->height) bottom = dpi->height;
    00130   bottom -= top;
    00131   assert(bottom > 0);
    00132
    00133   dst = blitter->MoveTo(dpi->dst_ptr, left, top);
    00134
    00135   switch (mode) {
    00136     default: // FILLRECT_OPAQUE
    00137       blitter->DrawRect(dst, right, bottom, (uint8)colour);
    00138       break;
    00139
    00140     case FILLRECT_RECOLOUR:
    00141       blitter->DrawColourMappingRect(dst, right, bottom, GB(colour, 0, PALETTE_WIDTH));
    00142       break;
    00143
    00144     case FILLRECT_CHECKER: {
    00145       byte bo = (oleft - left + dpi->left + otop - top + dpi->top) & 1;
    00146       do {
    00147         for (int i = (bo ^= 1); i < right; i += 2) blitter->SetPixel(dst, i, 0, (uint8)colour);
    00148         dst = blitter->MoveTo(dst, 0, 1);
    00149       } while (--bottom > 0);
    00150       break;
    00151     }
    00152   }
    00153 }
    00154
    00155 void GfxDrawLine(int x, int y, int x2, int y2, int colour)
    00156 {
    00157   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00158   DrawPixelInfo *dpi = _cur_dpi;
    00159
    00160   x -= dpi->left;
    00161   x2 -= dpi->left;
    00162   y -= dpi->top;
    00163   y2 -= dpi->top;
    00164
    00165   /* Check clipping */
    00166   if (x < 0 && x2 < 0) return;
    00167   if (y < 0 && y2 < 0) return;
    00168   if (x > dpi->width  && x2 > dpi->width)  return;
    00169   if (y > dpi->height && y2 > dpi->height) return;
    00170
    00171   blitter->DrawLine(dpi->dst_ptr, x, y, x2, y2, dpi->width, dpi->height, colour);
    00172 }
    00173
    00174 void GfxDrawLineUnscaled(int x, int y, int x2, int y2, int colour)
    00175 {
    00176   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00177   DrawPixelInfo *dpi = _cur_dpi;
    00178
    00179   x -= dpi->left;
    00180   x2 -= dpi->left;
    00181   y -= dpi->top;
    00182   y2 -= dpi->top;
    00183
    00184   /* Check clipping */
    00185   if (x < 0 && x2 < 0) return;
    00186   if (y < 0 && y2 < 0) return;
    00187   if (x > dpi->width  && x2 > dpi->width)  return;
    00188   if (y > dpi->height && y2 > dpi->height) return;
    00189
    00190   blitter->DrawLine(dpi->dst_ptr, UnScaleByZoom(x, dpi->zoom), UnScaleByZoom(y, dpi->zoom),
    00191       UnScaleByZoom(x2, dpi->zoom), UnScaleByZoom(y2, dpi->zoom),
    00192       UnScaleByZoom(dpi->width, dpi->zoom), UnScaleByZoom(dpi->height, dpi->zoom), colour);
    00193 }
    00194
    00208 void DrawBox(int x, int y, int dx1, int dy1, int dx2, int dy2, int dx3, int dy3)
    00209 {
    00210   /*           ....
    00211    *         ..    ....
    00212    *       ..          ....
    00213    *     ..                ^
    00214    *   <--__(dx1,dy1)    /(dx2,dy2)
    00215    *   :    --__       /   :
    00216    *   :        --__ /     :
    00217    *   :            *(x,y) :
    00218    *   :            |      :
    00219    *   :            |     ..
    00220    *    ....        |(dx3,dy3)
    00221    *        ....    | ..
    00222    *            ....V.
    00223    */
    00224
    00225   static const byte colour = 255;
    00226
    00227   GfxDrawLineUnscaled(x, y, x + dx1, y + dy1, colour);
    00228   GfxDrawLineUnscaled(x, y, x + dx2, y + dy2, colour);
    00229   GfxDrawLineUnscaled(x, y, x + dx3, y + dy3, colour);
    00230
    00231   GfxDrawLineUnscaled(x + dx1, y + dy1, x + dx1 + dx2, y + dy1 + dy2, colour);
    00232   GfxDrawLineUnscaled(x + dx1, y + dy1, x + dx1 + dx3, y + dy1 + dy3, colour);
    00233   GfxDrawLineUnscaled(x + dx2, y + dy2, x + dx2 + dx1, y + dy2 + dy1, colour);
    00234   GfxDrawLineUnscaled(x + dx2, y + dy2, x + dx2 + dx3, y + dy2 + dy3, colour);
    00235   GfxDrawLineUnscaled(x + dx3, y + dy3, x + dx3 + dx1, y + dy3 + dy1, colour);
    00236   GfxDrawLineUnscaled(x + dx3, y + dy3, x + dx3 + dx2, y + dy3 + dy2, colour);
    00237 }
    00238
    00243 static void SetColourRemap(TextColour colour)
    00244 {
    00245   if (colour == TC_INVALID) return;
    00246
    00247   if (colour & IS_PALETTE_COLOUR) {
    00248     _string_colourremap[1] = colour & ~IS_PALETTE_COLOUR;
    00249     _string_colourremap[2] = (_use_palette == PAL_DOS) ? 1 : 215;
    00250   } else {
    00251     _string_colourremap[1] = _string_colourmap[_use_palette][colour].text;
    00252     _string_colourremap[2] = _string_colourmap[_use_palette][colour].shadow;
    00253   }
    00254   _colour_remap_ptr = _string_colourremap;
    00255 }
    00256
    00257 #if !defined(WITH_ICU)
    00258 static void HandleBiDiAndArabicShapes(char *text, const char *lastof) {}
    00259 #else
    00260 #include <unicode/ubidi.h>
    00261 #include <unicode/ushape.h>
    00262
    00291 static void HandleBiDiAndArabicShapes(char *buffer, const char *lastof)
    00292 {
    00293   UChar input_output[DRAW_STRING_BUFFER];
    00294   UChar intermediate[DRAW_STRING_BUFFER];
    00295
    00296   char *t = buffer;
    00297   size_t length = 0;
    00298   while (*t != '\0' && length < lengthof(input_output) - 1) {
    00299     WChar tmp;
    00300     t += Utf8Decode(&tmp, t);
    00301     input_output[length++] = tmp;
    00302   }
    00303   input_output[length] = 0;
    00304
    00305   UErrorCode err = U_ZERO_ERROR;
    00306   UBiDi *para = ubidi_openSized((int32_t)length, 0, &err);
    00307   if (para == NULL) return;
    00308
    00309   ubidi_setPara(para, input_output, (int32_t)length, _dynlang.text_dir == TD_RTL ? UBIDI_DEFAULT_RTL : UBIDI_DEFAULT_LTR, NULL, &err);
    00310   ubidi_writeReordered(para, intermediate, (int32_t)length, 0, &err);
    00311   length = u_shapeArabic(intermediate, (int32_t)length, input_output, lengthof(input_output), U_SHAPE_TEXT_DIRECTION_VISUAL_LTR | U_SHAPE_LETTERS_SHAPE, &err);
    00312   ubidi_close(para);
    00313
    00314   if (U_FAILURE(err)) return;
    00315
    00316   t = buffer;
    00317   for (size_t i = 0; i < length && t < (lastof - 4); i++) {
    00318     t += Utf8Encode(t, input_output[i]);
    00319   }
    00320   *t = '\0';
    00321 }
    00322 #endif /* WITH_ICU */
    00323
    00324
    00330 static int TruncateString(char *str, int maxw)
    00331 {
    00332   int w = 0;
    00333   FontSize size = _cur_fontsize;
    00334   int ddd, ddd_w;
    00335
    00336   WChar c;
    00337   char *ddd_pos;
    00338
    00339   ddd_w = ddd = GetCharacterWidth(size, '.') * 3;
    00340
    00341   for (ddd_pos = str; (c = Utf8Consume((const char **)&str)) != '\0'; ) {
    00342     if (IsPrintable(c)) {
    00343       w += GetCharacterWidth(size, c);
    00344
    00345       if (w >= maxw) {
    00346         /* string got too big... insert dotdotdot, but make sure we do not
    00347          * print anything beyond the string termination character. */
    00348         for (int i = 0; *ddd_pos != '\0' && i < 3; i++, ddd_pos++) *ddd_pos = '.';
    00349         *ddd_pos = '\0';
    00350         return ddd_w;
    00351       }
    00352     } else {
    00353       if (c == SCC_SETX) {
    00354         w = *str;
    00355         str++;
    00356       } else if (c == SCC_SETXY) {
    00357         w = *str;
    00358         str += 2;
    00359       } else if (c == SCC_TINYFONT) {
    00360         size = FS_SMALL;
    00361         ddd = GetCharacterWidth(size, '.') * 3;
    00362       } else if (c == SCC_BIGFONT) {
    00363         size = FS_LARGE;
    00364         ddd = GetCharacterWidth(size, '.') * 3;
    00365       }
    00366     }
    00367
    00368     /* Remember the last position where three dots fit. */
    00369     if (w + ddd < maxw) {
    00370       ddd_w = w + ddd;
    00371       ddd_pos = str;
    00372     }
    00373   }
    00374
    00375   return w;
    00376 }
    00377
    00388 static inline int TruncateStringID(StringID src, char *dest, int maxw, const char *last)
    00389 {
    00390   GetString(dest, src, last);
    00391   return TruncateString(dest, maxw);
    00392 }
    00393
    00404 int DrawString(int x, int y, StringID str, TextColour colour)
    00405 {
    00406   char buffer[DRAW_STRING_BUFFER];
    00407
    00408   GetString(buffer, str, lastof(buffer));
    00409   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00410   return ReallyDoDrawString(buffer, x, y, colour);
    00411 }
    00412
    00424 int DrawStringTruncated(int x, int y, StringID str, TextColour colour, uint maxw)
    00425 {
    00426   char buffer[DRAW_STRING_BUFFER];
    00427   TruncateStringID(str, buffer, maxw, lastof(buffer));
    00428   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00429   return ReallyDoDrawString(buffer, x, y, colour);
    00430 }
    00431
    00442 int DrawStringRightAligned(int x, int y, StringID str, TextColour colour)
    00443 {
    00444   char buffer[DRAW_STRING_BUFFER];
    00445   int w;
    00446
    00447   GetString(buffer, str, lastof(buffer));
    00448   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00449
    00450   w = GetStringBoundingBox(buffer).width;
    00451   ReallyDoDrawString(buffer, x - w, y, colour);
    00452
    00453   return w;
    00454 }
    00455
    00465 void DrawStringRightAlignedTruncated(int x, int y, StringID str, TextColour colour, uint maxw)
    00466 {
    00467   char buffer[DRAW_STRING_BUFFER];
    00468
    00469   TruncateStringID(str, buffer, maxw, lastof(buffer));
    00470   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00471   ReallyDoDrawString(buffer, x - GetStringBoundingBox(buffer).width, y, colour);
    00472 }
    00473
    00482 void DrawStringRightAlignedUnderline(int x, int y, StringID str, TextColour colour)
    00483 {
    00484   int w = DrawStringRightAligned(x, y, str, colour);
    00485   GfxFillRect(x - w, y + 10, x, y + 10, _string_colourremap[1]);
    00486 }
    00487
    00498 int DrawStringCentered(int x, int y, StringID str, TextColour colour)
    00499 {
    00500   char buffer[DRAW_STRING_BUFFER];
    00501   int w;
    00502
    00503   GetString(buffer, str, lastof(buffer));
    00504   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00505
    00506   w = GetStringBoundingBox(buffer).width;
    00507   ReallyDoDrawString(buffer, x - w / 2, y, colour);
    00508
    00509   return w;
    00510 }
    00511
    00523 int DrawStringCenteredTruncated(int xl, int xr, int y, StringID str, TextColour colour)
    00524 {
    00525   char buffer[DRAW_STRING_BUFFER];
    00526   TruncateStringID(str, buffer, xr - xl, lastof(buffer));
    00527   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00528
    00529   int w = GetStringBoundingBox(buffer).width;
    00530   return ReallyDoDrawString(buffer, (xl + xr - w) / 2, y, colour);
    00531 }
    00532
    00543 int DoDrawStringCentered(int x, int y, const char *str, TextColour colour)
    00544 {
    00545   char buffer[DRAW_STRING_BUFFER];
    00546   strecpy(buffer, str, lastof(buffer));
    00547   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00548
    00549   int w = GetStringBoundingBox(buffer).width;
    00550   ReallyDoDrawString(buffer, x - w / 2, y, colour);
    00551   return w;
    00552 }
    00553
    00562 void DrawStringCenterUnderline(int x, int y, StringID str, TextColour colour)
    00563 {
    00564   int w = DrawStringCentered(x, y, str, colour);
    00565   GfxFillRect(x - (w >> 1), y + 10, x - (w >> 1) + w, y + 10, _string_colourremap[1]);
    00566 }
    00567
    00577 void DrawStringCenterUnderlineTruncated(int xl, int xr, int y, StringID str, TextColour colour)
    00578 {
    00579   int w = DrawStringCenteredTruncated(xl, xr, y, str, colour);
    00580   GfxFillRect((xl + xr - w) / 2, y + 10, (xl + xr + w) / 2, y + 10, _string_colourremap[1]);
    00581 }
    00582
    00602 uint32 FormatStringLinebreaks(char *str, const char *last, int maxw)
    00603 {
    00604   FontSize size = _cur_fontsize;
    00605   int num = 0;
    00606
    00607   assert(maxw > 0);
    00608
    00609   for (;;) {
    00610     /* The character *after* the last space. */
    00611     char *last_space = NULL;
    00612     int w = 0;
    00613
    00614     for (;;) {
    00615       WChar c = Utf8Consume((const char **)&str);
    00616       /* whitespace is where we will insert the line-break */
    00617       if (IsWhitespace(c)) last_space = str;
    00618
    00619       if (IsPrintable(c)) {
    00620         int char_w = GetCharacterWidth(size, c);
    00621         w += char_w;
    00622         if (w > maxw) {
    00623           /* The string is longer than maximum width so we need to decide
    00624            * what to do with it. */
    00625           if (w == char_w) {
    00626             /* The character is wider than allowed width; don't know
    00627              * what to do with this case... bail out! */
    00628             return num + (size << 16);
    00629           }
    00630           if (last_space == NULL) {
    00631             /* No space has been found. Just terminate at our current
    00632              * location. This usually happens for languages that do not
    00633              * require spaces in strings, like Chinese, Japanese and
    00634              * Korean. For other languages terminating mid-word might
    00635              * not be the best, but terminating the whole string instead
    00636              * of continuing the word at the next line is worse. */
    00637             str = Utf8PrevChar(str);
    00638             size_t len = strlen(str);
    00639             char *terminator = str + len;
    00640
    00641             /* The string location + length of the string + 1 for '\0'
    00642              * always fits; otherwise there's no trailing '\0' and it
    00643              * it not a valid string. */
    00644             assert(terminator <= last);
    00645             assert(*terminator == '\0');
    00646
    00647             /* If the string is too long we have to terminate it earlier. */
    00648             if (terminator == last) {
    00649               /* Get the 'begin' of the previous character and make that
    00650                * the terminator of the string; we truncate it 'early'. */
    00651               *Utf8PrevChar(terminator) = '\0';
    00652               len = strlen(str);
    00653             }
    00654             /* Also move the terminator! */
    00655             memmove(str + 1, str, len + 1);
    00656             *str = '\0';
    00657             /* str needs to point to the character *after* the last space */
    00658             str++;
    00659           } else {
    00660             /* A space is found; perfect place to terminate */
    00661             str = last_space;
    00662           }
    00663           break;
    00664         }
    00665       } else {
    00666         switch (c) {
    00667           case '\0': return num + (size << 16); break;
    00668           case SCC_SETX:  str++; break;
    00669           case SCC_SETXY: str += 2; break;
    00670           case SCC_TINYFONT: size = FS_SMALL; break;
    00671           case SCC_BIGFONT:  size = FS_LARGE; break;
    00672           case '\n': goto end_of_inner_loop;
    00673         }
    00674       }
    00675     }
    00676 end_of_inner_loop:
    00677     /* String didn't fit on line (or a '\n' was encountered), so 'dummy' terminate
    00678      * and increase linecount. We use Utf8PrevChar() as also non 1 char long
    00679      * whitespace seperators are supported */
    00680     num++;
    00681     char *s = Utf8PrevChar(str);
    00682     *s++ = '\0';
    00683
    00684     /* In which case (see above) we will shift remainder to left and close the gap */
    00685     if (str - s >= 1) {
    00686       for (; str[-1] != '\0';) *s++ = *str++;
    00687     }
    00688   }
    00689 }
    00690
    00691
    00698 static int GetMultilineStringHeight(const char *src, int num)
    00699 {
    00700   int maxy = 0;
    00701   int y = 0;
    00702   int fh = GetCharacterHeight(_cur_fontsize);
    00703
    00704   for (;;) {
    00705     WChar c = Utf8Consume(&src);
    00706
    00707     switch (c) {
    00708       case 0:            y += fh; if (--num < 0) return maxy; break;
    00709       case '\n':         y += fh;                             break;
    00710       case SCC_SETX:     src++;                               break;
    00711       case SCC_SETXY:    src++; y = (int)*src++;              break;
    00712       case SCC_TINYFONT: fh = GetCharacterHeight(FS_SMALL);   break;
    00713       case SCC_BIGFONT:  fh = GetCharacterHeight(FS_LARGE);   break;
    00714       default:           maxy = max<int>(maxy, y + fh);       break;
    00715     }
    00716   }
    00717 }
    00718
    00719
    00725 int GetStringHeight(StringID str, int maxw)
    00726 {
    00727   char buffer[DRAW_STRING_BUFFER];
    00728
    00729   GetString(buffer, str, lastof(buffer));
    00730
    00731   uint32 tmp = FormatStringLinebreaks(buffer, lastof(buffer), maxw);
    00732
    00733   return GetMultilineStringHeight(buffer, GB(tmp, 0, 16));
    00734 }
    00735
    00736
    00742 void DrawStringMultiCenter(int x, int y, StringID str, int maxw)
    00743 {
    00744   char buffer[DRAW_STRING_BUFFER];
    00745   uint32 tmp;
    00746   int num, mt;
    00747   const char *src;
    00748   WChar c;
    00749
    00750   GetString(buffer, str, lastof(buffer));
    00751
    00752   tmp = FormatStringLinebreaks(buffer, lastof(buffer), maxw);
    00753   num = GB(tmp, 0, 16);
    00754
    00755   mt = GetCharacterHeight((FontSize)GB(tmp, 16, 16));
    00756
    00757   y -= (mt >> 1) * num;
    00758
    00759   src = buffer;
    00760
    00761   for (;;) {
    00762     char buf2[DRAW_STRING_BUFFER];
    00763     strecpy(buf2, src, lastof(buf2));
    00764     HandleBiDiAndArabicShapes(buf2, lastof(buf2));
    00765     int w = GetStringBoundingBox(buf2).width;
    00766     ReallyDoDrawString(buf2, x - (w >> 1), y, TC_FROMSTRING, true);
    00767     _cur_fontsize = _last_fontsize;
    00768
    00769     for (;;) {
    00770       c = Utf8Consume(&src);
    00771       if (c == 0) {
    00772         y += mt;
    00773         if (--num < 0) {
    00774           _cur_fontsize = FS_NORMAL;
    00775           return;
    00776         }
    00777         break;
    00778       } else if (c == SCC_SETX) {
    00779         src++;
    00780       } else if (c == SCC_SETXY) {
    00781         src += 2;
    00782       }
    00783     }
    00784   }
    00785 }
    00786
    00787
    00788 uint DrawStringMultiLine(int x, int y, StringID str, int maxw, int maxh)
    00789 {
    00790   char buffer[DRAW_STRING_BUFFER];
    00791   uint total_height;
    00792   const char *src;
    00793   WChar c;
    00794
    00795   GetString(buffer, str, lastof(buffer));
    00796
    00797   uint32 tmp = FormatStringLinebreaks(buffer, lastof(buffer), maxw);
    00798   int num = GB(tmp, 0, 16);
    00799
    00800   int mt = GetCharacterHeight((FontSize)GB(tmp, 16, 16));
    00801   total_height = (num + 1) * mt;
    00802
    00803   if (maxh != -1 && (int)total_height > maxh) {
    00804     /* Check there's room enough for at least one line. */
    00805     if (maxh < mt) return 0;
    00806
    00807     num = maxh / mt - 1;
    00808     total_height = (num + 1) * mt;
    00809   }
    00810
    00811   src = buffer;
    00812
    00813   for (;;) {
    00814     char buf2[DRAW_STRING_BUFFER];
    00815     strecpy(buf2, src, lastof(buf2));
    00816     HandleBiDiAndArabicShapes(buf2, lastof(buf2));
    00817     ReallyDoDrawString(buf2, x, y, TC_FROMSTRING, true);
    00818     _cur_fontsize = _last_fontsize;
    00819
    00820     for (;;) {
    00821       c = Utf8Consume(&src);
    00822       if (c == 0) {
    00823         y += mt;
    00824         if (--num < 0) {
    00825           _cur_fontsize = FS_NORMAL;
    00826           return total_height;
    00827         }
    00828         break;
    00829       } else if (c == SCC_SETX) {
    00830         src++;
    00831       } else if (c == SCC_SETXY) {
    00832         src += 2;
    00833       }
    00834     }
    00835   }
    00836 }
    00837
    00845 Dimension GetStringBoundingBox(const char *str)
    00846 {
    00847   FontSize size = _cur_fontsize;
    00848   Dimension br;
    00849   int max_width;
    00850   WChar c;
    00851
    00852   br.width = br.height = max_width = 0;
    00853   for (;;) {
    00854     c = Utf8Consume(&str);
    00855     if (c == 0) break;
    00856     if (IsPrintable(c)) {
    00857       br.width += GetCharacterWidth(size, c);
    00858     } else {
    00859       switch (c) {
    00860         case SCC_SETX: br.width += (byte)*str++; break;
    00861         case SCC_SETXY:
    00862           br.width += (byte)*str++;
    00863           br.height += (byte)*str++;
    00864           break;
    00865         case SCC_TINYFONT: size = FS_SMALL; break;
    00866         case SCC_BIGFONT:  size = FS_LARGE; break;
    00867         case '\n':
    00868           br.height += GetCharacterHeight(size);
    00869           if (br.width > max_width) max_width = br.width;
    00870           br.width = 0;
    00871           break;
    00872       }
    00873     }
    00874   }
    00875   br.height += GetCharacterHeight(size);
    00876
    00877   br.width  = max(br.width, max_width);
    00878   return br;
    00879 }
    00880
    00888 void DrawCharCentered(WChar c, int x, int y, TextColour colour)
    00889 {
    00890   SetColourRemap(colour);
    00891   GfxMainBlitter(GetGlyph(FS_NORMAL, c), x - GetCharacterWidth(FS_NORMAL, c) / 2, y, BM_COLOUR_REMAP);
    00892 }
    00893
    00911 int DoDrawString(const char *string, int x, int y, TextColour colour, bool parse_string_also_when_clipped)
    00912 {
    00913   char buffer[DRAW_STRING_BUFFER];
    00914   strecpy(buffer, string, lastof(buffer));
    00915   HandleBiDiAndArabicShapes(buffer, lastof(buffer));
    00916
    00917   return ReallyDoDrawString(buffer, x, y, colour, parse_string_also_when_clipped);
    00918 }
    00919
    00937 static int ReallyDoDrawString(const char *string, int x, int y, TextColour colour, bool parse_string_also_when_clipped)
    00938 {
    00939   DrawPixelInfo *dpi = _cur_dpi;
    00940   FontSize size = _cur_fontsize;
    00941   WChar c;
    00942   int xo = x, yo = y;
    00943
    00944   TextColour previous_colour = colour;
    00945
    00946   if (!parse_string_also_when_clipped) {
    00947     /* in "mode multiline", the available space have been verified. Not in regular one.
    00948      * So if the string cannot be drawn, return the original start to say so.*/
    00949     if (x >= dpi->left + dpi->width || y >= dpi->top + dpi->height) return x;
    00950
    00951     if (colour != TC_INVALID) { // the invalid colour flag test should not  really occur.  But better be safe
    00952 switch_colour:;
    00953       SetColourRemap(colour);
    00954     }
    00955   }
    00956
    00957 check_bounds:
    00958   if (y + 19 <= dpi->top || dpi->top + dpi->height <= y) {
    00959 skip_char:;
    00960     for (;;) {
    00961       c = Utf8Consume(&string);
    00962       if (!IsPrintable(c)) goto skip_cont;
    00963     }
    00964   }
    00965
    00966   for (;;) {
    00967     c = Utf8Consume(&string);
    00968 skip_cont:;
    00969     if (c == 0) {
    00970       _last_fontsize = size;
    00971       return x;  // Nothing more to draw, get out. And here is the new x position
    00972     }
    00973     if (IsPrintable(c)) {
    00974       if (x >= dpi->left + dpi->width) goto skip_char;
    00975       if (x + 26 >= dpi->left) {
    00976         GfxMainBlitter(GetGlyph(size, c), x, y, BM_COLOUR_REMAP);
    00977       }
    00978       x += GetCharacterWidth(size, c);
    00979     } else if (c == '\n') { // newline = {}
    00980       x = xo;  // We require a new line, so the x coordinate is reset
    00981       y += GetCharacterHeight(size);
    00982       goto check_bounds;
    00983     } else if (c >= SCC_BLUE && c <= SCC_BLACK) { // change colour?
    00984       previous_colour = colour;
    00985       colour = (TextColour)(c - SCC_BLUE);
    00986       goto switch_colour;
    00987     } else if (c == SCC_PREVIOUS_COLOUR) { // revert to the previous colour
    00988       Swap(colour, previous_colour);
    00989       goto switch_colour;
    00990     } else if (c == SCC_SETX) { // {SETX}
    00991       x = xo + (byte)*string++;
    00992     } else if (c == SCC_SETXY) {// {SETXY}
    00993       x = xo + (byte)*string++;
    00994       y = yo + (byte)*string++;
    00995     } else if (c == SCC_TINYFONT) { // {TINYFONT}
    00996       size = FS_SMALL;
    00997     } else if (c == SCC_BIGFONT) { // {BIGFONT}
    00998       size = FS_LARGE;
    00999     } else {
    01000       DEBUG(misc, 0, "[utf8] unknown string command character %d", c);
    01001     }
    01002   }
    01003 }
    01004
    01017 int DoDrawStringTruncated(const char *str, int x, int y, TextColour colour, uint maxw)
    01018 {
    01019   char buffer[DRAW_STRING_BUFFER];
    01020   strecpy(buffer, str, lastof(buffer));
    01021   TruncateString(buffer, maxw);
    01022   return DoDrawString(buffer, x, y, colour);
    01023 }
    01024
    01033 void DrawSprite(SpriteID img, SpriteID pal, int x, int y, const SubSprite *sub)
    01034 {
    01035   if (HasBit(img, PALETTE_MODIFIER_TRANSPARENT)) {
    01036     _colour_remap_ptr = GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1;
    01037     GfxMainBlitter(GetSprite(GB(img, 0, SPRITE_WIDTH), ST_NORMAL), x, y, BM_TRANSPARENT, sub);
    01038   } else if (pal != PAL_NONE) {
    01039     _colour_remap_ptr = GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1;
    01040     GfxMainBlitter(GetSprite(GB(img, 0, SPRITE_WIDTH), ST_NORMAL), x, y, BM_COLOUR_REMAP, sub);
    01041   } else {
    01042     GfxMainBlitter(GetSprite(GB(img, 0, SPRITE_WIDTH), ST_NORMAL), x, y, BM_NORMAL, sub);
    01043   }
    01044 }
    01045
    01046 static void GfxMainBlitter(const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub)
    01047 {
    01048   const DrawPixelInfo *dpi = _cur_dpi;
    01049   Blitter::BlitterParams bp;
    01050
    01051   /* Amount of pixels to clip from the source sprite */
    01052   int clip_left   = (sub != NULL ? max(0,                   -sprite->x_offs + sub->left       ) : 0);
    01053   int clip_top    = (sub != NULL ? max(0,                   -sprite->y_offs + sub->top        ) : 0);
    01054   int clip_right  = (sub != NULL ? max(0, sprite->width  - (-sprite->x_offs + sub->right  + 1)) : 0);
    01055   int clip_bottom = (sub != NULL ? max(0, sprite->height - (-sprite->y_offs + sub->bottom + 1)) : 0);
    01056
    01057   if (clip_left + clip_right >= sprite->width) return;
    01058   if (clip_top + clip_bottom >= sprite->height) return;
    01059
    01060   /* Move to the correct offset */
    01061   x += sprite->x_offs;
    01062   y += sprite->y_offs;
    01063
    01064   /* Copy the main data directly from the sprite */
    01065   bp.sprite = sprite->data;
    01066   bp.sprite_width = sprite->width;
    01067   bp.sprite_height = sprite->height;
    01068   bp.width = UnScaleByZoom(sprite->width - clip_left - clip_right, dpi->zoom);
    01069   bp.height = UnScaleByZoom(sprite->height - clip_top - clip_bottom, dpi->zoom);
    01070   bp.top = 0;
    01071   bp.left = 0;
    01072   bp.skip_left = UnScaleByZoomLower(clip_left, dpi->zoom);
    01073   bp.skip_top = UnScaleByZoomLower(clip_top, dpi->zoom);
    01074
    01075   x += ScaleByZoom(bp.skip_left, dpi->zoom);
    01076   y += ScaleByZoom(bp.skip_top, dpi->zoom);
    01077
    01078   bp.dst = dpi->dst_ptr;
    01079   bp.pitch = dpi->pitch;
    01080   bp.remap = _colour_remap_ptr;
    01081
    01082   assert(sprite->width > 0);
    01083   assert(sprite->height > 0);
    01084
    01085   if (bp.width <= 0) return;
    01086   if (bp.height <= 0) return;
    01087
    01088   y -= dpi->top;
    01089   /* Check for top overflow */
    01090   if (y < 0) {
    01091     bp.height -= -UnScaleByZoom(y, dpi->zoom);
    01092     if (bp.height <= 0) return;
    01093     bp.skip_top += -UnScaleByZoom(y, dpi->zoom);
    01094     y = 0;
    01095   } else {
    01096     bp.top = UnScaleByZoom(y, dpi->zoom);
    01097   }
    01098
    01099   /* Check for bottom overflow */
    01100   y += ScaleByZoom(bp.height, dpi->zoom) - dpi->height;
    01101   if (y > 0) {
    01102     bp.height -= UnScaleByZoom(y, dpi->zoom);
    01103     if (bp.height <= 0) return;
    01104   }
    01105
    01106   x -= dpi->left;
    01107   /* Check for left overflow */
    01108   if (x < 0) {
    01109     bp.width -= -UnScaleByZoom(x, dpi->zoom);
    01110     if (bp.width <= 0) return;
    01111     bp.skip_left += -UnScaleByZoom(x, dpi->zoom);
    01112     x = 0;
    01113   } else {
    01114     bp.left = UnScaleByZoom(x, dpi->zoom);
    01115   }
    01116
    01117   /* Check for right overflow */
    01118   x += ScaleByZoom(bp.width, dpi->zoom) - dpi->width;
    01119   if (x > 0) {
    01120     bp.width -= UnScaleByZoom(x, dpi->zoom);
    01121     if (bp.width <= 0) return;
    01122   }
    01123
    01124   assert(bp.skip_left + bp.width <= UnScaleByZoom(sprite->width, dpi->zoom));
    01125   assert(bp.skip_top + bp.height <= UnScaleByZoom(sprite->height, dpi->zoom));
    01126
    01127   BlitterFactoryBase::GetCurrentBlitter()->Draw(&bp, mode, dpi->zoom);
    01128 }
    01129
    01130 void DoPaletteAnimations();
    01131
    01132 void GfxInitPalettes()
    01133 {
    01134   memcpy(_cur_palette, _palettes[_use_palette], sizeof(_cur_palette));
    01135
    01136   DoPaletteAnimations();
    01137   _pal_first_dirty = 0;
    01138   _pal_count_dirty = 256;
    01139 }
    01140
    01141 #define EXTR(p, q) (((uint16)(_palette_animation_counter * (p)) * (q)) >> 16)
    01142 #define EXTR2(p, q) (((uint16)(~_palette_animation_counter * (p)) * (q)) >> 16)
    01143
    01144 void DoPaletteAnimations()
    01145 {
    01146   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01147   const Colour *s;
    01148   const ExtraPaletteValues *ev = &_extra_palette_values;
    01149   /* Amount of colours to be rotated.
    01150    * A few more for the DOS palette, because the water colours are
    01151    * 245-254 for DOS and 217-226 for Windows.  */
    01152   const int colour_rotation_amount = (_use_palette == PAL_DOS) ? PALETTE_ANIM_SIZE_DOS : PALETTE_ANIM_SIZE_WIN;
    01153   Colour old_val[PALETTE_ANIM_SIZE_DOS];
    01154   const int oldval_size = colour_rotation_amount * sizeof(*old_val);
    01155   const uint old_tc = _palette_animation_counter;
    01156   uint i;
    01157   uint j;
    01158
    01159   if (blitter != NULL && blitter->UsePaletteAnimation() == Blitter::PALETTE_ANIMATION_NONE) {
    01160     _palette_animation_counter = 0;
    01161   }
    01162
    01163   Colour *palette_pos = &_cur_palette[PALETTE_ANIM_SIZE_START];  // Points to where animations are taking place on the palette
    01164   /* Makes a copy of the current anmation palette in old_val,
    01165    * so the work on the current palette could be compared, see if there has been any changes */
    01166   memcpy(old_val, palette_pos, oldval_size);
    01167
    01168   /* Dark blue water */
    01169   s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->dark_water_TOY : ev->dark_water;
    01170   j = EXTR(320, 5);
    01171   for (i = 0; i != 5; i++) {
    01172     *palette_pos++ = s[j];
    01173     j++;
    01174     if (j == 5) j = 0;
    01175   }
    01176
    01177   /* Glittery water */
    01178   s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->glitter_water_TOY : ev->glitter_water;
    01179   j = EXTR(128, 15);
    01180   for (i = 0; i != 5; i++) {
    01181     *palette_pos++ = s[j];
    01182     j += 3;
    01183     if (j >= 15) j -= 15;
    01184   }
    01185
    01186   /* Fizzy Drink bubbles animation */
    01187   s = ev->fizzy_drink;
    01188   j = EXTR2(512, 5);
    01189   for (i = 0; i != 5; i++) {
    01190     *palette_pos++ = s[j];
    01191     j++;
    01192     if (j == 5) j = 0;
    01193   }
    01194
    01195   /* Oil refinery fire animation */
    01196   s = ev->oil_ref;
    01197   j = EXTR2(512, 7);
    01198   for (i = 0; i != 7; i++) {
    01199     *palette_pos++ = s[j];
    01200     j++;
    01201     if (j == 7) j = 0;
    01202   }
    01203
    01204   /* Radio tower blinking */
    01205   {
    01206     byte i = (_palette_animation_counter >> 1) & 0x7F;
    01207     byte v;
    01208
    01209     (v = 255, i < 0x3f) ||
    01210     (v = 128, i < 0x4A || i >= 0x75) ||
    01211     (v = 20);
    01212     palette_pos->r = v;
    01213     palette_pos->g = 0;
    01214     palette_pos->b = 0;
    01215     palette_pos++;
    01216
    01217     i ^= 0x40;
    01218     (v = 255, i < 0x3f) ||
    01219     (v = 128, i < 0x4A || i >= 0x75) ||
    01220     (v = 20);
    01221     palette_pos->r = v;
    01222     palette_pos->g = 0;
    01223     palette_pos->b = 0;
    01224     palette_pos++;
    01225   }
    01226
    01227   /* Handle lighthouse and stadium animation */
    01228   s = ev->lighthouse;
    01229   j = EXTR(256, 4);
    01230   for (i = 0; i != 4; i++) {
    01231     *palette_pos++ = s[j];
    01232     j++;
    01233     if (j == 4) j = 0;
    01234   }
    01235
    01236   /* Animate water for old DOS graphics */
    01237   if (_use_palette == PAL_DOS) {
    01238     /* Dark blue water DOS */
    01239     s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->dark_water_TOY : ev->dark_water;
    01240     j = EXTR(320, 5);
    01241     for (i = 0; i != 5; i++) {
    01242       *palette_pos++ = s[j];
    01243       j++;
    01244       if (j == 5) j = 0;
    01245     }
    01246
    01247     /* Glittery water DOS */
    01248     s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->glitter_water_TOY : ev->glitter_water;
    01249     j = EXTR(128, 15);
    01250     for (i = 0; i != 5; i++) {
    01251       *palette_pos++ = s[j];
    01252       j += 3;
    01253       if (j >= 15) j -= 15;
    01254     }
    01255   }
    01256
    01257   if (blitter != NULL && blitter->UsePaletteAnimation() == Blitter::PALETTE_ANIMATION_NONE) {
    01258     _palette_animation_counter = old_tc;
    01259   } else {
    01260     if (memcmp(old_val, &_cur_palette[PALETTE_ANIM_SIZE_START], oldval_size) != 0) {
    01261       /* Did we changed anything on the palette? Seems so.  Mark it as dirty */
    01262       _pal_first_dirty = PALETTE_ANIM_SIZE_START;
    01263       _pal_count_dirty = colour_rotation_amount;
    01264     }
    01265   }
    01266 }
    01267
    01268
    01270 void LoadStringWidthTable()
    01271 {
    01272   uint i;
    01273
    01274   /* Normal font */
    01275   for (i = 0; i != 224; i++) {
    01276     _stringwidth_table[FS_NORMAL][i] = GetGlyphWidth(FS_NORMAL, i + 32);
    01277   }
    01278
    01279   /* Small font */
    01280   for (i = 0; i != 224; i++) {
    01281     _stringwidth_table[FS_SMALL][i] = GetGlyphWidth(FS_SMALL, i + 32);
    01282   }
    01283
    01284   /* Large font */
    01285   for (i = 0; i != 224; i++) {
    01286     _stringwidth_table[FS_LARGE][i] = GetGlyphWidth(FS_LARGE, i + 32);
    01287   }
    01288 }
    01289
    01296 byte GetCharacterWidth(FontSize size, WChar key)
    01297 {
    01298   /* Use _stringwidth_table cache if possible */
    01299   if (key >= 32 && key < 256) return _stringwidth_table[size][key - 32];
    01300
    01301   return GetGlyphWidth(size, key);
    01302 }
    01303
    01304
    01305 void ScreenSizeChanged()
    01306 {
    01307   _dirty_bytes_per_line = (_screen.width + DIRTY_BLOCK_WIDTH - 1) / DIRTY_BLOCK_WIDTH;
    01308   _dirty_blocks = ReallocT<byte>(_dirty_blocks, _dirty_bytes_per_line * ((_screen.height + DIRTY_BLOCK_HEIGHT - 1) / DIRTY_BLOCK_HEIGHT));
    01309
    01310   /* check the dirty rect */
    01311   if (_invalid_rect.right >= _screen.width) _invalid_rect.right = _screen.width;
    01312   if (_invalid_rect.bottom >= _screen.height) _invalid_rect.bottom = _screen.height;
    01313
    01314   /* screen size changed and the old bitmap is invalid now, so we don't want to undraw it */
    01315   _cursor.visible = false;
    01316 }
    01317
    01318 void UndrawMouseCursor()
    01319 {
    01320   /* Don't undraw the mouse cursor if the screen is not ready */
    01321   if (_screen.dst_ptr == NULL) return;
    01322
    01323   if (_cursor.visible) {
    01324     Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01325     _cursor.visible = false;
    01326     blitter->CopyFromBuffer(blitter->MoveTo(_screen.dst_ptr, _cursor.draw_pos.x, _cursor.draw_pos.y), _cursor_backup.GetBuffer(), _cursor.draw_size.x, _cursor.draw_size.y);
    01327     _video_driver->MakeDirty(_cursor.draw_pos.x, _cursor.draw_pos.y, _cursor.draw_size.x, _cursor.draw_size.y);
    01328   }
    01329 }
    01330
    01331 void DrawMouseCursor()
    01332 {
    01333 #if defined(WINCE)
    01334   /* Don't ever draw the mouse for WinCE, as we work with a stylus */
    01335   return;
    01336 #endif
    01337
    01338   /* Don't draw the mouse cursor if the screen is not ready */
    01339   if (_screen.dst_ptr == NULL) return;
    01340
    01341   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01342   int x;
    01343   int y;
    01344   int w;
    01345   int h;
    01346
    01347   /* Redraw mouse cursor but only when it's inside the window */
    01348   if (!_cursor.in_window) return;
    01349
    01350   /* Don't draw the mouse cursor if it's already drawn */
    01351   if (_cursor.visible) {
    01352     if (!_cursor.dirty) return;
    01353     UndrawMouseCursor();
    01354   }
    01355
    01356   w = _cursor.size.x;
    01357   x = _cursor.pos.x + _cursor.offs.x + _cursor.short_vehicle_offset;
    01358   if (x < 0) {
    01359     w += x;
    01360     x = 0;
    01361   }
    01362   if (w > _screen.width - x) w = _screen.width - x;
    01363   if (w <= 0) return;
    01364   _cursor.draw_pos.x = x;
    01365   _cursor.draw_size.x = w;
    01366
    01367   h = _cursor.size.y;
    01368   y = _cursor.pos.y + _cursor.offs.y;
    01369   if (y < 0) {
    01370     h += y;
    01371     y = 0;
    01372   }
    01373   if (h > _screen.height - y) h = _screen.height - y;
    01374   if (h <= 0) return;
    01375   _cursor.draw_pos.y = y;
    01376   _cursor.draw_size.y = h;
    01377
    01378   uint8 *buffer = _cursor_backup.Allocate(blitter->BufferSize(w, h));
    01379
    01380   /* Make backup of stuff below cursor */
    01381   blitter->CopyToBuffer(blitter->MoveTo(_screen.dst_ptr, _cursor.draw_pos.x, _cursor.draw_pos.y), buffer, _cursor.draw_size.x, _cursor.draw_size.y);
    01382
    01383   /* Draw cursor on screen */
    01384   _cur_dpi = &_screen;
    01385   DrawSprite(_cursor.sprite, _cursor.pal, _cursor.pos.x + _cursor.short_vehicle_offset, _cursor.pos.y);
    01386
    01387   _video_driver->MakeDirty(_cursor.draw_pos.x, _cursor.draw_pos.y, _cursor.draw_size.x, _cursor.draw_size.y);
    01388
    01389   _cursor.visible = true;
    01390   _cursor.dirty = false;
    01391 }
    01392
    01393 void RedrawScreenRect(int left, int top, int right, int bottom)
    01394 {
    01395   assert(right <= _screen.width && bottom <= _screen.height);
    01396   if (_cursor.visible) {
    01397     if (right > _cursor.draw_pos.x &&
    01398         left < _cursor.draw_pos.x + _cursor.draw_size.x &&
    01399         bottom > _cursor.draw_pos.y &&
    01400         top < _cursor.draw_pos.y + _cursor.draw_size.y) {
    01401       UndrawMouseCursor();
    01402     }
    01403   }
    01404
    01405 #ifdef ENABLE_NETWORK
    01406   NetworkUndrawChatMessage();
    01407 #endif /* ENABLE_NETWORK */
    01408
    01409   DrawOverlappedWindowForAll(left, top, right, bottom);
    01410
    01411   _video_driver->MakeDirty(left, top, right - left, bottom - top);
    01412 }
    01413
    01419 void DrawDirtyBlocks()
    01420 {
    01421   byte *b = _dirty_blocks;
    01422   const int w = Align(_screen.width,  DIRTY_BLOCK_WIDTH);
    01423   const int h = Align(_screen.height, DIRTY_BLOCK_HEIGHT);
    01424   int x;
    01425   int y;
    01426
    01427   if (IsGeneratingWorld()) {
    01428     /* We are generating the world, so release our rights to the map and
    01429      * painting while we are waiting a bit. */
    01430     _genworld_paint_mutex->EndCritical();
    01431     _genworld_mapgen_mutex->EndCritical();
    01432
    01433     /* Wait a while and update _realtime_tick so we are given the rights */
    01434     CSleep(GENWORLD_REDRAW_TIMEOUT);
    01435     _realtime_tick += GENWORLD_REDRAW_TIMEOUT;
    01436     _genworld_paint_mutex->BeginCritical();
    01437     _genworld_mapgen_mutex->BeginCritical();
    01438   }
    01439
    01440   y = 0;
    01441   do {
    01442     x = 0;
    01443     do {
    01444       if (*b != 0) {
    01445         int left;
    01446         int top;
    01447         int right = x + DIRTY_BLOCK_WIDTH;
    01448         int bottom = y;
    01449         byte *p = b;
    01450         int h2;
    01451
    01452         /* First try coalescing downwards */
    01453         do {
    01454           *p = 0;
    01455           p += _dirty_bytes_per_line;
    01456           bottom += DIRTY_BLOCK_HEIGHT;
    01457         } while (bottom != h && *p != 0);
    01458
    01459         /* Try coalescing to the right too. */
    01460         h2 = (bottom - y) / DIRTY_BLOCK_HEIGHT;
    01461         assert(h2 > 0);
    01462         p = b;
    01463
    01464         while (right != w) {
    01465           byte *p2 = ++p;
    01466           int h = h2;
    01467           /* Check if a full line of dirty flags is set. */
    01468           do {
    01469             if (!*p2) goto no_more_coalesc;
    01470             p2 += _dirty_bytes_per_line;
    01471           } while (--h != 0);
    01472
    01473           /* Wohoo, can combine it one step to the right!
    01474            * Do that, and clear the bits. */
    01475           right += DIRTY_BLOCK_WIDTH;
    01476
    01477           h = h2;
    01478           p2 = p;
    01479           do {
    01480             *p2 = 0;
    01481             p2 += _dirty_bytes_per_line;
    01482           } while (--h != 0);
    01483         }
    01484         no_more_coalesc:
    01485
    01486         left = x;
    01487         top = y;
    01488
    01489         if (left   < _invalid_rect.left  ) left   = _invalid_rect.left;
    01490         if (top    < _invalid_rect.top   ) top    = _invalid_rect.top;
    01491         if (right  > _invalid_rect.right ) right  = _invalid_rect.right;
    01492         if (bottom > _invalid_rect.bottom) bottom = _invalid_rect.bottom;
    01493
    01494         if (left < right && top < bottom) {
    01495           RedrawScreenRect(left, top, right, bottom);
    01496         }
    01497
    01498       }
    01499     } while (b++, (x += DIRTY_BLOCK_WIDTH) != w);
    01500   } while (b += -(w / DIRTY_BLOCK_WIDTH) + _dirty_bytes_per_line, (y += DIRTY_BLOCK_HEIGHT) != h);
    01501
    01502   _invalid_rect.left = w;
    01503   _invalid_rect.top = h;
    01504   _invalid_rect.right = 0;
    01505   _invalid_rect.bottom = 0;
    01506 }
    01507
    01523 void SetDirtyBlocks(int left, int top, int right, int bottom)
    01524 {
    01525   byte *b;
    01526   int width;
    01527   int height;
    01528
    01529   if (left < 0) left = 0;
    01530   if (top < 0) top = 0;
    01531   if (right > _screen.width) right = _screen.width;
    01532   if (bottom > _screen.height) bottom = _screen.height;
    01533
    01534   if (left >= right || top >= bottom) return;
    01535
    01536   if (left   < _invalid_rect.left  ) _invalid_rect.left   = left;
    01537   if (top    < _invalid_rect.top   ) _invalid_rect.top    = top;
    01538   if (right  > _invalid_rect.right ) _invalid_rect.right  = right;
    01539   if (bottom > _invalid_rect.bottom) _invalid_rect.bottom = bottom;
    01540
    01541   left /= DIRTY_BLOCK_WIDTH;
    01542   top  /= DIRTY_BLOCK_HEIGHT;
    01543
    01544   b = _dirty_blocks + top * _dirty_bytes_per_line + left;
    01545
    01546   width  = ((right  - 1) / DIRTY_BLOCK_WIDTH)  - left + 1;
    01547   height = ((bottom - 1) / DIRTY_BLOCK_HEIGHT) - top  + 1;
    01548
    01549   assert(width > 0 && height > 0);
    01550
    01551   do {
    01552     int i = width;
    01553
    01554     do b[--i] = 0xFF; while (i);
    01555
    01556     b += _dirty_bytes_per_line;
    01557   } while (--height != 0);
    01558 }
    01559
    01565 void MarkWholeScreenDirty()
    01566 {
    01567   SetDirtyBlocks(0, 0, _screen.width, _screen.height);
    01568 }
    01569
    01582 bool FillDrawPixelInfo(DrawPixelInfo *n, int left, int top, int width, int height)
    01583 {
    01584   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01585   const DrawPixelInfo *o = _cur_dpi;
    01586
    01587   n->zoom = ZOOM_LVL_NORMAL;
    01588
    01589   assert(width > 0);
    01590   assert(height > 0);
    01591
    01592   if ((left -= o->left) < 0) {
    01593     width += left;
    01594     if (width <= 0) return false;
    01595     n->left = -left;
    01596     left = 0;
    01597   } else {
    01598     n->left = 0;
    01599   }
    01600
    01601   if (width > o->width - left) {
    01602     width = o->width - left;
    01603     if (width <= 0) return false;
    01604   }
    01605   n->width = width;
    01606
    01607   if ((top -= o->top) < 0) {
    01608     height += top;
    01609     if (height <= 0) return false;
    01610     n->top = -top;
    01611     top = 0;
    01612   } else {
    01613     n->top = 0;
    01614   }
    01615
    01616   n->dst_ptr = blitter->MoveTo(o->dst_ptr, left, top);
    01617   n->pitch = o->pitch;
    01618
    01619   if (height > o->height - top) {
    01620     height = o->height - top;
    01621     if (height <= 0) return false;
    01622   }
    01623   n->height = height;
    01624
    01625   return true;
    01626 }
    01627
    01628 static void SetCursorSprite(SpriteID cursor, SpriteID pal)
    01629 {
    01630   CursorVars *cv = &_cursor;
    01631   const Sprite *p;
    01632
    01633   if (cv->sprite == cursor) return;
    01634
    01635   p = GetSprite(GB(cursor, 0, SPRITE_WIDTH), ST_NORMAL);
    01636   cv->sprite = cursor;
    01637   cv->pal    = pal;
    01638   cv->size.y = p->height;
    01639   cv->size.x = p->width;
    01640   cv->offs.x = p->x_offs;
    01641   cv->offs.y = p->y_offs;
    01642
    01643   cv->dirty = true;
    01644   cv->short_vehicle_offset = 0;
    01645 }
    01646
    01647 static void SwitchAnimatedCursor()
    01648 {
    01649   const AnimCursor *cur = _cursor.animate_cur;
    01650
    01651   if (cur == NULL || cur->sprite == AnimCursor::LAST) cur = _cursor.animate_list;
    01652
    01653   SetCursorSprite(cur->sprite, _cursor.pal);
    01654
    01655   _cursor.animate_timeout = cur->display_time;
    01656   _cursor.animate_cur     = cur + 1;
    01657 }
    01658
    01659 void CursorTick()
    01660 {
    01661   if (_cursor.animate_timeout != 0 && --_cursor.animate_timeout == 0)
    01662     SwitchAnimatedCursor();
    01663 }
    01664
    01665 void SetMouseCursor(SpriteID sprite, SpriteID pal)
    01666 {
    01667   /* Turn off animation */
    01668   _cursor.animate_timeout = 0;
    01669   /* Set cursor */
    01670   SetCursorSprite(sprite, pal);
    01671 }
    01672
    01673 void SetAnimatedMouseCursor(const AnimCursor *table)
    01674 {
    01675   _cursor.animate_list = table;
    01676   _cursor.animate_cur = NULL;
    01677   _cursor.pal = PAL_NONE;
    01678   SwitchAnimatedCursor();
    01679 }
    01680
    01681 bool ChangeResInGame(int width, int height)
    01682 {
    01683   return (_screen.width == width && _screen.height == height) || _video_driver->ChangeResolution(width, height);
    01684 }
    01685
    01686 bool ToggleFullScreen(bool fs)
    01687 {
    01688   bool result = _video_driver->ToggleFullscreen(fs);
    01689   if (_fullscreen != fs && _num_resolutions == 0) {
    01690     DEBUG(driver, 0, "Could not find a suitable fullscreen resolution");
    01691   }
    01692   return result;
    01693 }
    01694
    01695 static int CDECL compare_res(const Dimension *pa, const Dimension *pb)
    01696 {
    01697   int x = pa->width - pb->width;
    01698   if (x != 0) return x;
    01699   return pa->height - pb->height;
    01700 }
    01701
    01702 void SortResolutions(int count)
    01703 {
    01704   QSortT(_resolutions, count, &compare_res);
    01705 }