# gfx.cpp

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    00001 /* $Id: gfx.cpp 24041 2012-03-18 16:47:16Z 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 "gfx_func.h"
    00014 #include "fontcache.h"
    00015 #include "progress.h"
    00016 #include "zoom_func.h"
    00017 #include "blitter/factory.hpp"
    00018 #include "video/video_driver.hpp"
    00019 #include "strings_func.h"
    00020 #include "settings_type.h"
    00021 #include "network/network.h"
    00022 #include "network/network_func.h"
    00023 #include "window_func.h"
    00024 #include "newgrf_debug.h"
    00025
    00026 #include "table/palettes.h"
    00027 #include "table/sprites.h"
    00028 #include "table/control_codes.h"
    00029
    00030 byte _dirkeys;
    00031 bool _fullscreen;
    00032 CursorVars _cursor;
    00033 bool _ctrl_pressed;
    00034 bool _shift_pressed;
    00035 byte _fast_forward;
    00036 bool _left_button_down;
    00037 bool _left_button_clicked;
    00038 bool _right_button_down;
    00039 bool _right_button_clicked;
    00040 DrawPixelInfo _screen;
    00041 bool _screen_disable_anim = false;
    00042 bool _exit_game;
    00043 GameMode _game_mode;
    00044 SwitchMode _switch_mode;
    00045 PauseModeByte _pause_mode;
    00046 Palette _cur_palette;
    00047
    00048 static Dimension _max_char_size[FS_END];
    00049 static int _max_char_height;
    00050 static int _max_char_width;
    00051 static byte _stringwidth_table[FS_END][224];
    00052 DrawPixelInfo *_cur_dpi;
    00053 byte _colour_gradient[COLOUR_END][8];
    00054
    00055 static void GfxMainBlitterViewport(const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub = NULL, SpriteID sprite_id = SPR_CURSOR_MOUSE);
    00056 static void GfxMainBlitter(const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub = NULL, SpriteID sprite_id = SPR_CURSOR_MOUSE, ZoomLevel zoom = ZOOM_LVL_NORMAL);
    00057
    00062 struct DrawStringParams {
    00063   FontSize fontsize;
    00064   TextColour cur_colour, prev_colour;
    00065
    00066   DrawStringParams(TextColour colour, FontSize fontsize) : fontsize(fontsize), cur_colour(colour), prev_colour(colour) {}
    00067
    00072   inline void SetColour(TextColour c)
    00073   {
    00074     assert(c >=  TC_BLUE && c <= TC_BLACK);
    00075     this->prev_colour = this->cur_colour;
    00076     this->cur_colour = c;
    00077   }
    00078
    00080   inline void SetPreviousColour()
    00081   {
    00082     Swap(this->cur_colour, this->prev_colour);
    00083   }
    00084
    00089   inline void SetFontSize(FontSize f)
    00090   {
    00091     this->fontsize = f;
    00092   }
    00093 };
    00094
    00095 static ReusableBuffer<uint8> _cursor_backup;
    00096
    00104 static Rect _invalid_rect;
    00105 static const byte *_colour_remap_ptr;
    00106 static byte _string_colourremap[3];
    00107
    00108 static const uint DIRTY_BLOCK_HEIGHT   = 8;
    00109 static const uint DIRTY_BLOCK_WIDTH    = 64;
    00110
    00111 static uint _dirty_bytes_per_line = 0;
    00112 static byte *_dirty_blocks = NULL;
    00113
    00114 void GfxScroll(int left, int top, int width, int height, int xo, int yo)
    00115 {
    00116   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00117
    00118   if (xo == 0 && yo == 0) return;
    00119
    00120   if (_cursor.visible) UndrawMouseCursor();
    00121
    00122 #ifdef ENABLE_NETWORK
    00123   if (_networking) NetworkUndrawChatMessage();
    00124 #endif /* ENABLE_NETWORK */
    00125
    00126   blitter->ScrollBuffer(_screen.dst_ptr, left, top, width, height, xo, yo);
    00127   /* This part of the screen is now dirty. */
    00128   _video_driver->MakeDirty(left, top, width, height);
    00129 }
    00130
    00131
    00146 void GfxFillRect(int left, int top, int right, int bottom, int colour, FillRectMode mode)
    00147 {
    00148   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00149   const DrawPixelInfo *dpi = _cur_dpi;
    00150   void *dst;
    00151   const int otop = top;
    00152   const int oleft = left;
    00153
    00154   if (dpi->zoom != ZOOM_LVL_NORMAL) return;
    00155   if (left > right || top > bottom) return;
    00156   if (right < dpi->left || left >= dpi->left + dpi->width) return;
    00157   if (bottom < dpi->top || top >= dpi->top + dpi->height) return;
    00158
    00159   if ( (left -= dpi->left) < 0) left = 0;
    00160   right = right - dpi->left + 1;
    00161   if (right > dpi->width) right = dpi->width;
    00162   right -= left;
    00163   assert(right > 0);
    00164
    00165   if ( (top -= dpi->top) < 0) top = 0;
    00166   bottom = bottom - dpi->top + 1;
    00167   if (bottom > dpi->height) bottom = dpi->height;
    00168   bottom -= top;
    00169   assert(bottom > 0);
    00170
    00171   dst = blitter->MoveTo(dpi->dst_ptr, left, top);
    00172
    00173   switch (mode) {
    00174     default: // FILLRECT_OPAQUE
    00175       blitter->DrawRect(dst, right, bottom, (uint8)colour);
    00176       break;
    00177
    00178     case FILLRECT_RECOLOUR:
    00179       blitter->DrawColourMappingRect(dst, right, bottom, GB(colour, 0, PALETTE_WIDTH));
    00180       break;
    00181
    00182     case FILLRECT_CHECKER: {
    00183       byte bo = (oleft - left + dpi->left + otop - top + dpi->top) & 1;
    00184       do {
    00185         for (int i = (bo ^= 1); i < right; i += 2) blitter->SetPixel(dst, i, 0, (uint8)colour);
    00186         dst = blitter->MoveTo(dst, 0, 1);
    00187       } while (--bottom > 0);
    00188       break;
    00189     }
    00190   }
    00191 }
    00192
    00193 void GfxDrawLine(int x, int y, int x2, int y2, int colour, int width)
    00194 {
    00195   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00196   DrawPixelInfo *dpi = _cur_dpi;
    00197
    00198   assert(width > 0);
    00199
    00200   x -= dpi->left;
    00201   x2 -= dpi->left;
    00202   y -= dpi->top;
    00203   y2 -= dpi->top;
    00204
    00205   /* Check clipping */
    00206   if (x + width / 2 < 0           && x2 + width / 2 < 0          ) return;
    00207   if (y + width / 2 < 0           && y2 + width / 2 < 0          ) return;
    00208   if (x - width / 2 > dpi->width  && x2 - width / 2 > dpi->width ) return;
    00209   if (y - width / 2 > dpi->height && y2 - width / 2 > dpi->height) return;
    00210
    00211   blitter->DrawLine(dpi->dst_ptr, x, y, x2, y2, dpi->width, dpi->height, colour, width);
    00212 }
    00213
    00214 void GfxDrawLineUnscaled(int x, int y, int x2, int y2, int colour)
    00215 {
    00216   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    00217   DrawPixelInfo *dpi = _cur_dpi;
    00218
    00219   x -= dpi->left;
    00220   x2 -= dpi->left;
    00221   y -= dpi->top;
    00222   y2 -= dpi->top;
    00223
    00224   /* Check clipping */
    00225   if (x < 0 && x2 < 0) return;
    00226   if (y < 0 && y2 < 0) return;
    00227   if (x > dpi->width  && x2 > dpi->width)  return;
    00228   if (y > dpi->height && y2 > dpi->height) return;
    00229
    00230   blitter->DrawLine(dpi->dst_ptr, UnScaleByZoom(x, dpi->zoom), UnScaleByZoom(y, dpi->zoom),
    00231       UnScaleByZoom(x2, dpi->zoom), UnScaleByZoom(y2, dpi->zoom),
    00232       UnScaleByZoom(dpi->width, dpi->zoom), UnScaleByZoom(dpi->height, dpi->zoom), colour, 1);
    00233 }
    00234
    00248 void DrawBox(int x, int y, int dx1, int dy1, int dx2, int dy2, int dx3, int dy3)
    00249 {
    00250   /*           ....
    00251    *         ..    ....
    00252    *       ..          ....
    00253    *     ..                ^
    00254    *   <--__(dx1,dy1)    /(dx2,dy2)
    00255    *   :    --__       /   :
    00256    *   :        --__ /     :
    00257    *   :            *(x,y) :
    00258    *   :            |      :
    00259    *   :            |     ..
    00260    *    ....        |(dx3,dy3)
    00261    *        ....    | ..
    00262    *            ....V.
    00263    */
    00264
    00265   static const byte colour = PC_WHITE;
    00266
    00267   GfxDrawLineUnscaled(x, y, x + dx1, y + dy1, colour);
    00268   GfxDrawLineUnscaled(x, y, x + dx2, y + dy2, colour);
    00269   GfxDrawLineUnscaled(x, y, x + dx3, y + dy3, colour);
    00270
    00271   GfxDrawLineUnscaled(x + dx1, y + dy1, x + dx1 + dx2, y + dy1 + dy2, colour);
    00272   GfxDrawLineUnscaled(x + dx1, y + dy1, x + dx1 + dx3, y + dy1 + dy3, colour);
    00273   GfxDrawLineUnscaled(x + dx2, y + dy2, x + dx2 + dx1, y + dy2 + dy1, colour);
    00274   GfxDrawLineUnscaled(x + dx2, y + dy2, x + dx2 + dx3, y + dy2 + dy3, colour);
    00275   GfxDrawLineUnscaled(x + dx3, y + dy3, x + dx3 + dx1, y + dy3 + dy1, colour);
    00276   GfxDrawLineUnscaled(x + dx3, y + dy3, x + dx3 + dx2, y + dy3 + dy2, colour);
    00277 }
    00278
    00283 static void SetColourRemap(TextColour colour)
    00284 {
    00285   if (colour == TC_INVALID) return;
    00286
    00287   /* Black strings have no shading ever; the shading is black, so it
    00288    * would be invisible at best, but it actually makes it illegible. */
    00289   bool no_shade   = (colour & TC_NO_SHADE) != 0 || colour == TC_BLACK;
    00290   bool raw_colour = (colour & TC_IS_PALETTE_COLOUR) != 0;
    00291   colour &= ~(TC_NO_SHADE | TC_IS_PALETTE_COLOUR);
    00292
    00293   _string_colourremap[1] = raw_colour ? (byte)colour : _string_colourmap[colour];
    00294   _string_colourremap[2] = no_shade ? 0 : 1;
    00295   _colour_remap_ptr = _string_colourremap;
    00296 }
    00297
    00298 #if !defined(WITH_ICU)
    00299 typedef WChar UChar;
    00300 static UChar *HandleBiDiAndArabicShapes(UChar *text) { return text; }
    00301 #else
    00302 #include <unicode/ubidi.h>
    00303 #include <unicode/ushape.h>
    00304
    00334 static UChar *HandleBiDiAndArabicShapes(UChar *buffer)
    00335 {
    00336   static UChar input_output[DRAW_STRING_BUFFER];
    00337   UChar intermediate[DRAW_STRING_BUFFER];
    00338
    00339   UChar *t = buffer;
    00340   size_t length = 0;
    00341   while (*t != '\0' && length < lengthof(input_output) - 1) {
    00342     input_output[length++] = *t++;
    00343   }
    00344   input_output[length] = 0;
    00345
    00346   UErrorCode err = U_ZERO_ERROR;
    00347   UBiDi *para = ubidi_openSized((int32_t)length, 0, &err);
    00348   if (para == NULL) return buffer;
    00349
    00350   ubidi_setPara(para, input_output, (int32_t)length, _current_text_dir == TD_RTL ? UBIDI_DEFAULT_RTL : UBIDI_DEFAULT_LTR, NULL, &err);
    00351   ubidi_writeReordered(para, intermediate, (int32_t)length, UBIDI_REMOVE_BIDI_CONTROLS, &err);
    00352   length = u_shapeArabic(intermediate, (int32_t)length, input_output, lengthof(input_output), U_SHAPE_TEXT_DIRECTION_VISUAL_LTR | U_SHAPE_LETTERS_SHAPE, &err);
    00353   ubidi_close(para);
    00354
    00355   if (U_FAILURE(err)) return buffer;
    00356
    00357   input_output[length] = '\0';
    00358   return input_output;
    00359 }
    00360 #endif /* WITH_ICU */
    00361
    00362
    00372 static int TruncateString(char *str, int maxw, bool ignore_setxy, FontSize start_fontsize)
    00373 {
    00374   int w = 0;
    00375   FontSize size = start_fontsize;
    00376   int ddd, ddd_w;
    00377
    00378   WChar c;
    00379   char *ddd_pos;
    00380
    00381   ddd_w = ddd = GetCharacterWidth(size, '.') * 3;
    00382
    00383   for (ddd_pos = str; (c = Utf8Consume(const_cast<const char **>(&str))) != '\0'; ) {
    00384     if (IsPrintable(c) && !IsTextDirectionChar(c)) {
    00385       w += GetCharacterWidth(size, c);
    00386
    00387       if (w > maxw) {
    00388         /* string got too big... insert dotdotdot, but make sure we do not
    00389          * print anything beyond the string termination character. */
    00390         for (int i = 0; *ddd_pos != '\0' && i < 3; i++, ddd_pos++) *ddd_pos = '.';
    00391         *ddd_pos = '\0';
    00392         return ddd_w;
    00393       }
    00394     } else {
    00395       if (c == SCC_SETX) {
    00396         if (!ignore_setxy) w = *str;
    00397         str++;
    00398       } else if (c == SCC_SETXY) {
    00399         if (!ignore_setxy) w = *str;
    00400         str += 2;
    00401       } else if (c == SCC_TINYFONT) {
    00402         size = FS_SMALL;
    00403         ddd = GetCharacterWidth(size, '.') * 3;
    00404       } else if (c == SCC_BIGFONT) {
    00405         size = FS_LARGE;
    00406         ddd = GetCharacterWidth(size, '.') * 3;
    00407       } else if (c == '\n') {
    00408         DEBUG(misc, 0, "Drawing string using newlines with DrawString instead of DrawStringMultiLine. Please notify the developers of this: [%s]", str);
    00409       }
    00410     }
    00411
    00412     /* Remember the last position where three dots fit. */
    00413     if (w + ddd < maxw) {
    00414       ddd_w = w + ddd;
    00415       ddd_pos = str;
    00416     }
    00417   }
    00418
    00419   return w;
    00420 }
    00421
    00422 static int ReallyDoDrawString(const UChar *string, int x, int y, DrawStringParams &params, bool parse_string_also_when_clipped = false);
    00423
    00430 static int GetStringWidth(const UChar *str, FontSize start_fontsize)
    00431 {
    00432   FontSize size = start_fontsize;
    00433   int max_width;
    00434   int width;
    00435   WChar c;
    00436
    00437   width = max_width = 0;
    00438   for (;;) {
    00439     c = *str++;
    00440     if (c == 0) break;
    00441     if (IsPrintable(c) && !IsTextDirectionChar(c)) {
    00442       width += GetCharacterWidth(size, c);
    00443     } else {
    00444       switch (c) {
    00445         case SCC_SETX:
    00446         case SCC_SETXY:
    00447           /* At this point there is no SCC_SETX(Y) anymore */
    00448           NOT_REACHED();
    00449           break;
    00450         case SCC_TINYFONT: size = FS_SMALL; break;
    00451         case SCC_BIGFONT:  size = FS_LARGE; break;
    00452         case '\n':
    00453           max_width = max(max_width, width);
    00454           break;
    00455       }
    00456     }
    00457   }
    00458
    00459   return max(max_width, width);
    00460 }
    00461
    00480 static int DrawString(int left, int right, int top, char *str, const char *last, DrawStringParams &params, StringAlignment align, bool underline = false, bool truncate = true)
    00481 {
    00482   /* We need the outer limits of both left/right */
    00483   int min_left = INT32_MAX;
    00484   int max_right = INT32_MIN;
    00485
    00486   int initial_left = left;
    00487   int initial_right = right;
    00488   int initial_top = top;
    00489
    00490   if (truncate) TruncateString(str, right - left + 1, (align & SA_STRIP) == SA_STRIP, params.fontsize);
    00491
    00492   /*
    00493    * To support SETX and SETXY properly with RTL languages we have to
    00494    * calculate the offsets from the right. To do this we need to split
    00495    * the string and draw the parts separated by SETX(Y).
    00496    * So here we split
    00497    */
    00498   static SmallVector<UChar *, 4> setx_offsets;
    00499   setx_offsets.Clear();
    00500
    00501   UChar draw_buffer[DRAW_STRING_BUFFER];
    00502   UChar *p = draw_buffer;
    00503
    00504   *setx_offsets.Append() = p;
    00505
    00506   char *loc = str;
    00507   for (;;) {
    00508     WChar c;
    00509     /* We cannot use Utf8Consume as we need the location of the SETX(Y) */
    00510     size_t len = Utf8Decode(&c, loc);
    00511     *p++ = c;
    00512
    00513     if (c == '\0') break;
    00514     if (p >= lastof(draw_buffer) - 3) {
    00515       /* Make sure we never overflow (even if copying SCC_SETX(Y)). */
    00516       *p = '\0';
    00517       break;
    00518     }
    00519     if (c != SCC_SETX && c != SCC_SETXY) {
    00520       loc += len;
    00521       continue;
    00522     }
    00523
    00524     if (align & SA_STRIP) {
    00525       /* We do not want to keep the SETX(Y)!. It was already copied, so
    00526        * remove it and undo the incrementing of the pointer! */
    00527       *p-- = '\0';
    00528       loc += len + (c == SCC_SETXY ? 2 : 1);
    00529       continue;
    00530     }
    00531
    00532     if ((align & SA_HOR_MASK) != SA_LEFT) {
    00533       DEBUG(grf, 1, "Using SETX and/or SETXY when not aligned to the left. Fixing alignment...");
    00534
    00535       /* For left alignment and change the left so it will roughly be in the
    00536        * middle. This will never cause the string to be completely centered,
    00537        * but once SETX is used you cannot be sure the actual content of the
    00538        * string is centered, so it doesn't really matter. */
    00539       align = SA_LEFT | SA_FORCE;
    00540       initial_left = left = max(left, (left + right - (int)GetStringBoundingBox(str).width) / 2);
    00541     }
    00542
    00543     /* We add the begin of the string, but don't add it twice */
    00544     if (p != draw_buffer) {
    00545       *setx_offsets.Append() = p;
    00546       p[-1] = '\0';
    00547       *p++ = c;
    00548     }
    00549
    00550     /* Skip the SCC_SETX(Y) ... */
    00551     loc += len;
    00552     /* ... copy the x coordinate ... */
    00553     *p++ = *loc++;
    00554     /* ... and finally copy the y coordinate if it exists */
    00555     if (c == SCC_SETXY) *p++ = *loc++;
    00556   }
    00557
    00558   /* In case we have a RTL language we swap the alignment. */
    00559   if (!(align & SA_FORCE) && _current_text_dir == TD_RTL && !(align & SA_STRIP) && (align & SA_HOR_MASK) != SA_HOR_CENTER) align ^= SA_RIGHT;
    00560
    00561   for (UChar **iter = setx_offsets.Begin(); iter != setx_offsets.End(); iter++) {
    00562     UChar *to_draw = *iter;
    00563     int offset = 0;
    00564
    00565     /* Skip the SETX(Y) and set the appropriate offsets. */
    00566     if (*to_draw == SCC_SETX || *to_draw == SCC_SETXY) {
    00567       to_draw++;
    00568       offset = *to_draw++;
    00569       if (*to_draw == SCC_SETXY) top = initial_top + *to_draw++;
    00570     }
    00571
    00572     to_draw = HandleBiDiAndArabicShapes(to_draw);
    00573     int w = GetStringWidth(to_draw, params.fontsize);
    00574
    00575     /* right is the right most position to draw on. In this case we want to do
    00576      * calculations with the width of the string. In comparison right can be
    00577      * seen as lastof(todraw) and width as lengthof(todraw). They differ by 1.
    00578      * So most +1/-1 additions are to move from lengthof to 'indices'.
    00579      */
    00580     switch (align & SA_HOR_MASK) {
    00581       case SA_LEFT:
    00582         /* right + 1 = left + w */
    00583         left = initial_left + offset;
    00584         right = left + w - 1;
    00585         break;
    00586
    00587       case SA_HOR_CENTER:
    00588         left  = RoundDivSU(initial_right + 1 + initial_left - w, 2);
    00589         /* right + 1 = left + w */
    00590         right = left + w - 1;
    00591         break;
    00592
    00593       case SA_RIGHT:
    00594         left = initial_right + 1 - w - offset;
    00595         break;
    00596
    00597       default:
    00598         NOT_REACHED();
    00599     }
    00600
    00601     min_left  = min(left, min_left);
    00602     max_right = max(right, max_right);
    00603
    00604     ReallyDoDrawString(to_draw, left, top, params, !truncate);
    00605     if (underline) {
    00606       GfxFillRect(left, top + FONT_HEIGHT_NORMAL, right, top + FONT_HEIGHT_NORMAL, _string_colourremap[1]);
    00607     }
    00608   }
    00609
    00610   return (align & SA_HOR_MASK) == SA_RIGHT ? min_left : max_right;
    00611 }
    00612
    00627 int DrawString(int left, int right, int top, const char *str, TextColour colour, StringAlignment align, bool underline, FontSize fontsize)
    00628 {
    00629   char buffer[DRAW_STRING_BUFFER];
    00630   strecpy(buffer, str, lastof(buffer));
    00631   DrawStringParams params(colour, fontsize);
    00632   return DrawString(left, right, top, buffer, lastof(buffer), params, align, underline);
    00633 }
    00634
    00649 int DrawString(int left, int right, int top, StringID str, TextColour colour, StringAlignment align, bool underline, FontSize fontsize)
    00650 {
    00651   char buffer[DRAW_STRING_BUFFER];
    00652   GetString(buffer, str, lastof(buffer));
    00653   DrawStringParams params(colour, fontsize);
    00654   return DrawString(left, right, top, buffer, lastof(buffer), params, align, underline);
    00655 }
    00656
    00677 uint32 FormatStringLinebreaks(char *str, const char *last, int maxw, FontSize size)
    00678 {
    00679   int num = 0;
    00680
    00681   assert(maxw > 0);
    00682
    00683   for (;;) {
    00684     /* The character *after* the last space. */
    00685     char *last_space = NULL;
    00686     int w = 0;
    00687
    00688     for (;;) {
    00689       WChar c = Utf8Consume(const_cast<const char **>(&str));
    00690       /* whitespace is where we will insert the line-break */
    00691       if (IsWhitespace(c)) last_space = str;
    00692
    00693       if (IsPrintable(c) && !IsTextDirectionChar(c)) {
    00694         int char_w = GetCharacterWidth(size, c);
    00695         w += char_w;
    00696         if (w > maxw) {
    00697           /* The string is longer than maximum width so we need to decide
    00698            * what to do with it. */
    00699           if (w == char_w) {
    00700             /* The character is wider than allowed width; don't know
    00701              * what to do with this case... bail out! */
    00702             return num + (size << 16);
    00703           }
    00704           if (last_space == NULL) {
    00705             /* No space has been found. Just terminate at our current
    00706              * location. This usually happens for languages that do not
    00707              * require spaces in strings, like Chinese, Japanese and
    00708              * Korean. For other languages terminating mid-word might
    00709              * not be the best, but terminating the whole string instead
    00710              * of continuing the word at the next line is worse. */
    00711             str = Utf8PrevChar(str);
    00712             size_t len = strlen(str);
    00713             char *terminator = str + len;
    00714
    00715             /* The string location + length of the string + 1 for '\0'
    00716              * always fits; otherwise there's no trailing '\0' and it
    00717              * it not a valid string. */
    00718             assert(terminator <= last);
    00719             assert(*terminator == '\0');
    00720
    00721             /* If the string is too long we have to terminate it earlier. */
    00722             if (terminator == last) {
    00723               /* Get the 'begin' of the previous character and make that
    00724                * the terminator of the string; we truncate it 'early'. */
    00725               *Utf8PrevChar(terminator) = '\0';
    00726               len = strlen(str);
    00727             }
    00728             /* Also move the terminator! */
    00729             memmove(str + 1, str, len + 1);
    00730             *str = '\0';
    00731             /* str needs to point to the character *after* the last space */
    00732             str++;
    00733           } else {
    00734             /* A space is found; perfect place to terminate */
    00735             str = last_space;
    00736           }
    00737           break;
    00738         }
    00739       } else {
    00740         switch (c) {
    00741           case '\0': return num + (size << 16);
    00742           case SCC_SETX:  str++; break;
    00743           case SCC_SETXY: str += 2; break;
    00744           case SCC_TINYFONT: size = FS_SMALL; break;
    00745           case SCC_BIGFONT:  size = FS_LARGE; break;
    00746           case '\n': goto end_of_inner_loop;
    00747         }
    00748       }
    00749     }
    00750 end_of_inner_loop:
    00751     /* String didn't fit on line (or a '\n' was encountered), so 'dummy' terminate
    00752      * and increase linecount. We use Utf8PrevChar() as also non 1 char long
    00753      * whitespace seperators are supported */
    00754     num++;
    00755     char *s = Utf8PrevChar(str);
    00756     *s++ = '\0';
    00757
    00758     /* In which case (see above) we will shift remainder to left and close the gap */
    00759     if (str - s >= 1) {
    00760       for (; str[-1] != '\0';) *s++ = *str++;
    00761     }
    00762   }
    00763 }
    00764
    00765
    00774 static int GetMultilineStringHeight(const char *src, int num, FontSize start_fontsize)
    00775 {
    00776   int maxy = 0;
    00777   int y = 0;
    00778   int fh = GetCharacterHeight(start_fontsize);
    00779
    00780   for (;;) {
    00781     WChar c = Utf8Consume(&src);
    00782
    00783     switch (c) {
    00784       case 0:            y += fh; if (--num < 0) return maxy; break;
    00785       case '\n':         y += fh;                             break;
    00786       case SCC_SETX:     src++;                               break;
    00787       case SCC_SETXY:    src++; y = (int)*src++;              break;
    00788       case SCC_TINYFONT: fh = GetCharacterHeight(FS_SMALL);   break;
    00789       case SCC_BIGFONT:  fh = GetCharacterHeight(FS_LARGE);   break;
    00790       default:           maxy = max<int>(maxy, y + fh);       break;
    00791     }
    00792   }
    00793 }
    00794
    00795
    00802 int GetStringHeight(StringID str, int maxw)
    00803 {
    00804   char buffer[DRAW_STRING_BUFFER];
    00805
    00806   GetString(buffer, str, lastof(buffer));
    00807
    00808   uint32 tmp = FormatStringLinebreaks(buffer, lastof(buffer), maxw);
    00809
    00810   return GetMultilineStringHeight(buffer, GB(tmp, 0, 16), FS_NORMAL);
    00811 }
    00812
    00819 Dimension GetStringMultiLineBoundingBox(StringID str, const Dimension &suggestion)
    00820 {
    00821   Dimension box = {suggestion.width, GetStringHeight(str, suggestion.width)};
    00822   return box;
    00823 }
    00824
    00825
    00832 int GetStringHeight(const char *str, int maxw)
    00833 {
    00834   char buffer[DRAW_STRING_BUFFER];
    00835
    00836   strecpy(buffer, str, lastof(buffer));
    00837
    00838   uint32 tmp = FormatStringLinebreaks(buffer, lastof(buffer), maxw);
    00839
    00840   return GetMultilineStringHeight(buffer, GB(tmp, 0, 16), FS_NORMAL);
    00841 }
    00842
    00849 Dimension GetStringMultiLineBoundingBox(const char *str, const Dimension &suggestion)
    00850 {
    00851   Dimension box = {suggestion.width, GetStringHeight(str, suggestion.width)};
    00852   return box;
    00853 }
    00854
    00871 static int DrawStringMultiLine(int left, int right, int top, int bottom, char *str, const char *last, TextColour colour, StringAlignment align, bool underline, FontSize fontsize)
    00872 {
    00873   int maxw = right - left + 1;
    00874   int maxh = bottom - top + 1;
    00875
    00876   /* It makes no sense to even try if it can't be drawn anyway, or
    00877    * do we really want to support fonts of 0 or less pixels high? */
    00878   if (maxh <= 0) return top;
    00879
    00880   uint32 tmp = FormatStringLinebreaks(str, last, maxw);
    00881   int num = GB(tmp, 0, 16) + 1;
    00882
    00883   int mt = GetCharacterHeight((FontSize)GB(tmp, 16, 16));
    00884   int total_height = num * mt;
    00885
    00886   int skip_lines = 0;
    00887   if (total_height > maxh) {
    00888     if (maxh < mt) return top; //  Not enough room for a single line.
    00889     if ((align & SA_VERT_MASK) == SA_BOTTOM) {
    00890       skip_lines = num;
    00891       num = maxh / mt;
    00892       skip_lines -= num;
    00893     } else {
    00894       num = maxh / mt;
    00895     }
    00896     total_height = num * mt;
    00897   }
    00898
    00899   int y;
    00900   switch (align & SA_VERT_MASK) {
    00901     case SA_TOP:
    00902       y = top;
    00903       break;
    00904
    00905     case SA_VERT_CENTER:
    00906       y = RoundDivSU(bottom + top - total_height, 2);
    00907       break;
    00908
    00909     case SA_BOTTOM:
    00910       y = bottom - total_height;
    00911       break;
    00912
    00913     default: NOT_REACHED();
    00914   }
    00915
    00916   const char *src = str;
    00917   DrawStringParams params(colour, fontsize);
    00918   int written_top = bottom; // Uppermost position of rendering a line of text
    00919   for (;;) {
    00920     if (skip_lines == 0) {
    00921       char buf2[DRAW_STRING_BUFFER];
    00922       strecpy(buf2, src, lastof(buf2));
    00923       DrawString(left, right, y, buf2, lastof(buf2), params, align, underline, false);
    00924       if (written_top > y) written_top = y;
    00925       y += mt;
    00926       num--;
    00927     }
    00928
    00929     for (;;) {
    00930       WChar c = Utf8Consume(&src);
    00931       if (c == 0) {
    00932         break;
    00933       } else if (c == SCC_SETX) {
    00934         src++;
    00935       } else if (c == SCC_SETXY) {
    00936         src += 2;
    00937       } else if (skip_lines > 0) {
    00938         /* Skipped drawing, so do additional processing to update params. */
    00939         if (c >= SCC_BLUE && c <= SCC_BLACK) {
    00940           params.SetColour((TextColour)(c - SCC_BLUE));
    00941         } else if (c == SCC_PREVIOUS_COLOUR) { // Revert to the previous colour.
    00942           params.SetPreviousColour();
    00943         } else if (c == SCC_TINYFONT) {
    00944           params.SetFontSize(FS_SMALL);
    00945         } else if (c == SCC_BIGFONT) {
    00946           params.SetFontSize(FS_LARGE);
    00947         }
    00948
    00949       }
    00950     }
    00951     if (skip_lines > 0) skip_lines--;
    00952     if (num == 0) return ((align & SA_VERT_MASK) == SA_BOTTOM) ? written_top : y;
    00953   }
    00954 }
    00955
    00971 int DrawStringMultiLine(int left, int right, int top, int bottom, const char *str, TextColour colour, StringAlignment align, bool underline, FontSize fontsize)
    00972 {
    00973   char buffer[DRAW_STRING_BUFFER];
    00974   strecpy(buffer, str, lastof(buffer));
    00975   return DrawStringMultiLine(left, right, top, bottom, buffer, lastof(buffer), colour, align, underline, fontsize);
    00976 }
    00977
    00993 int DrawStringMultiLine(int left, int right, int top, int bottom, StringID str, TextColour colour, StringAlignment align, bool underline, FontSize fontsize)
    00994 {
    00995   char buffer[DRAW_STRING_BUFFER];
    00996   GetString(buffer, str, lastof(buffer));
    00997   return DrawStringMultiLine(left, right, top, bottom, buffer, lastof(buffer), colour, align, underline, fontsize);
    00998 }
    00999
    01010 Dimension GetStringBoundingBox(const char *str, FontSize start_fontsize)
    01011 {
    01012   FontSize size = start_fontsize;
    01013   Dimension br;
    01014   uint max_width;
    01015   WChar c;
    01016
    01017   br.width = br.height = max_width = 0;
    01018   for (;;) {
    01019     c = Utf8Consume(&str);
    01020     if (c == 0) break;
    01021     if (IsPrintable(c) && !IsTextDirectionChar(c)) {
    01022       br.width += GetCharacterWidth(size, c);
    01023     } else {
    01024       switch (c) {
    01025         case SCC_SETX: br.width = max((uint)*str++, br.width); break;
    01026         case SCC_SETXY:
    01027           br.width  = max((uint)*str++, br.width);
    01028           br.height = max((uint)*str++, br.height);
    01029           break;
    01030         case SCC_TINYFONT: size = FS_SMALL; break;
    01031         case SCC_BIGFONT:  size = FS_LARGE; break;
    01032         case '\n':
    01033           br.height += GetCharacterHeight(size);
    01034           if (br.width > max_width) max_width = br.width;
    01035           br.width = 0;
    01036           break;
    01037       }
    01038     }
    01039   }
    01040   br.height += GetCharacterHeight(size);
    01041
    01042   br.width  = max(br.width, max_width);
    01043   return br;
    01044 }
    01045
    01052 Dimension GetStringBoundingBox(StringID strid)
    01053 {
    01054   char buffer[DRAW_STRING_BUFFER];
    01055
    01056   GetString(buffer, strid, lastof(buffer));
    01057   return GetStringBoundingBox(buffer);
    01058 }
    01059
    01067 void DrawCharCentered(WChar c, int x, int y, TextColour colour)
    01068 {
    01069   SetColourRemap(colour);
    01070   GfxMainBlitter(GetGlyph(FS_NORMAL, c), x - GetCharacterWidth(FS_NORMAL, c) / 2, y, BM_COLOUR_REMAP);
    01071 }
    01072
    01090 static int ReallyDoDrawString(const UChar *string, int x, int y, DrawStringParams &params, bool parse_string_also_when_clipped)
    01091 {
    01092   DrawPixelInfo *dpi = _cur_dpi;
    01093   bool draw_shadow = GetDrawGlyphShadow();
    01094   UChar c;
    01095   int xo = x;
    01096
    01097   if (!parse_string_also_when_clipped) {
    01098     /* in "mode multiline", the available space have been verified. Not in regular one.
    01099      * So if the string cannot be drawn, return the original start to say so.*/
    01100     if (x >= dpi->left + dpi->width || y >= dpi->top + dpi->height) return x;
    01101   }
    01102
    01103 switch_colour:;
    01104   SetColourRemap(params.cur_colour);
    01105
    01106 check_bounds:
    01107   if (y + _max_char_height <= dpi->top || dpi->top + dpi->height <= y) {
    01108 skip_char:;
    01109     for (;;) {
    01110       c = *string++;
    01111       if (!IsPrintable(c)) goto skip_cont;
    01112     }
    01113   }
    01114
    01115   for (;;) {
    01116     c = *string++;
    01117 skip_cont:;
    01118     if (c == 0) {
    01119       return x;  // Nothing more to draw, get out. And here is the new x position
    01120     }
    01121     if (IsPrintable(c) && !IsTextDirectionChar(c)) {
    01122       if (x >= dpi->left + dpi->width) goto skip_char;
    01123       if (x + _max_char_width >= dpi->left) {
    01124         const Sprite *glyph = GetGlyph(params.fontsize, c);
    01125         if (draw_shadow && params.fontsize == FS_NORMAL && params.cur_colour != TC_BLACK && !(c >= SCC_SPRITE_START && c <= SCC_SPRITE_END)) {
    01126           SetColourRemap(TC_BLACK);
    01127           GfxMainBlitter(glyph, x + 1, y + 1, BM_COLOUR_REMAP);
    01128           SetColourRemap(params.cur_colour);
    01129         }
    01130         GfxMainBlitter(glyph, x, y, BM_COLOUR_REMAP);
    01131       }
    01132       x += GetCharacterWidth(params.fontsize, c);
    01133     } else if (c == '\n') { // newline = {}
    01134       x = xo;  // We require a new line, so the x coordinate is reset
    01135       y += GetCharacterHeight(params.fontsize);
    01136       goto check_bounds;
    01137     } else if (c >= SCC_BLUE && c <= SCC_BLACK) { // change colour?
    01138       params.SetColour((TextColour)(c - SCC_BLUE));
    01139       goto switch_colour;
    01140     } else if (c == SCC_PREVIOUS_COLOUR) { // revert to the previous colour
    01141       params.SetPreviousColour();
    01142       goto switch_colour;
    01143     } else if (c == SCC_SETX || c == SCC_SETXY) { // {SETX}/{SETXY}
    01144       /* The characters are handled before calling this. */
    01145       NOT_REACHED();
    01146     } else if (c == SCC_TINYFONT) { // {TINYFONT}
    01147       params.SetFontSize(FS_SMALL);
    01148     } else if (c == SCC_BIGFONT) { // {BIGFONT}
    01149       params.SetFontSize(FS_LARGE);
    01150     } else if (!IsTextDirectionChar(c)) {
    01151       DEBUG(misc, 0, "[utf8] unknown string command character %d", c);
    01152     }
    01153   }
    01154 }
    01155
    01163 Dimension GetSpriteSize(SpriteID sprid, Point *offset, ZoomLevel zoom)
    01164 {
    01165   const Sprite *sprite = GetSprite(sprid, ST_NORMAL);
    01166
    01167   if (offset != NULL) {
    01168     offset->x = UnScaleByZoom(sprite->x_offs, zoom);
    01169     offset->y = UnScaleByZoom(sprite->y_offs, zoom);
    01170   }
    01171
    01172   Dimension d;
    01173   d.width  = max<int>(0, UnScaleByZoom(sprite->x_offs + sprite->width, zoom));
    01174   d.height = max<int>(0, UnScaleByZoom(sprite->y_offs + sprite->height, zoom));
    01175   return d;
    01176 }
    01177
    01186 void DrawSpriteViewport(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub)
    01187 {
    01188   SpriteID real_sprite = GB(img, 0, SPRITE_WIDTH);
    01189   if (HasBit(img, PALETTE_MODIFIER_TRANSPARENT)) {
    01190     _colour_remap_ptr = GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1;
    01191     GfxMainBlitterViewport(GetSprite(real_sprite, ST_NORMAL), x, y, BM_TRANSPARENT, sub, real_sprite);
    01192   } else if (pal != PAL_NONE) {
    01193     _colour_remap_ptr = GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1;
    01194     GfxMainBlitterViewport(GetSprite(real_sprite, ST_NORMAL), x, y, BM_COLOUR_REMAP, sub, real_sprite);
    01195   } else {
    01196     GfxMainBlitterViewport(GetSprite(real_sprite, ST_NORMAL), x, y, BM_NORMAL, sub, real_sprite);
    01197   }
    01198 }
    01199
    01209 void DrawSprite(SpriteID img, PaletteID pal, int x, int y, const SubSprite *sub, ZoomLevel zoom)
    01210 {
    01211   SpriteID real_sprite = GB(img, 0, SPRITE_WIDTH);
    01212   if (HasBit(img, PALETTE_MODIFIER_TRANSPARENT)) {
    01213     _colour_remap_ptr = GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1;
    01214     GfxMainBlitter(GetSprite(real_sprite, ST_NORMAL), x, y, BM_TRANSPARENT, sub, real_sprite, zoom);
    01215   } else if (pal != PAL_NONE) {
    01216     _colour_remap_ptr = GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1;
    01217     GfxMainBlitter(GetSprite(real_sprite, ST_NORMAL), x, y, BM_COLOUR_REMAP, sub, real_sprite, zoom);
    01218   } else {
    01219     GfxMainBlitter(GetSprite(real_sprite, ST_NORMAL), x, y, BM_NORMAL, sub, real_sprite, zoom);
    01220   }
    01221 }
    01222
    01223 static void GfxMainBlitterViewport(const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub, SpriteID sprite_id)
    01224 {
    01225   const DrawPixelInfo *dpi = _cur_dpi;
    01226   Blitter::BlitterParams bp;
    01227
    01228   /* Amount of pixels to clip from the source sprite */
    01229   int clip_left   = (sub != NULL ? max(0,                   -sprite->x_offs + sub->left * ZOOM_LVL_BASE       ) : 0);
    01230   int clip_top    = (sub != NULL ? max(0,                   -sprite->y_offs + sub->top  * ZOOM_LVL_BASE       ) : 0);
    01231   int clip_right  = (sub != NULL ? max(0, sprite->width  - (-sprite->x_offs + (sub->right + 1)  * ZOOM_LVL_BASE)) : 0);
    01232   int clip_bottom = (sub != NULL ? max(0, sprite->height - (-sprite->y_offs + (sub->bottom + 1) * ZOOM_LVL_BASE)) : 0);
    01233
    01234   if (clip_left + clip_right >= sprite->width) return;
    01235   if (clip_top + clip_bottom >= sprite->height) return;
    01236
    01237   /* Move to the correct offset */
    01238   x += sprite->x_offs;
    01239   y += sprite->y_offs;
    01240
    01241   /* Copy the main data directly from the sprite */
    01242   bp.sprite = sprite->data;
    01243   bp.sprite_width = sprite->width;
    01244   bp.sprite_height = sprite->height;
    01245   bp.width = UnScaleByZoom(sprite->width - clip_left - clip_right, dpi->zoom);
    01246   bp.height = UnScaleByZoom(sprite->height - clip_top - clip_bottom, dpi->zoom);
    01247   bp.top = 0;
    01248   bp.left = 0;
    01249   bp.skip_left = UnScaleByZoomLower(clip_left, dpi->zoom);
    01250   bp.skip_top = UnScaleByZoomLower(clip_top, dpi->zoom);
    01251
    01252   x += ScaleByZoom(bp.skip_left, dpi->zoom);
    01253   y += ScaleByZoom(bp.skip_top, dpi->zoom);
    01254
    01255   bp.dst = dpi->dst_ptr;
    01256   bp.pitch = dpi->pitch;
    01257   bp.remap = _colour_remap_ptr;
    01258
    01259   assert(sprite->width > 0);
    01260   assert(sprite->height > 0);
    01261
    01262   if (bp.width <= 0) return;
    01263   if (bp.height <= 0) return;
    01264
    01265   y -= dpi->top;
    01266   /* Check for top overflow */
    01267   if (y < 0) {
    01268     bp.height -= -UnScaleByZoom(y, dpi->zoom);
    01269     if (bp.height <= 0) return;
    01270     bp.skip_top += -UnScaleByZoom(y, dpi->zoom);
    01271     y = 0;
    01272   } else {
    01273     bp.top = UnScaleByZoom(y, dpi->zoom);
    01274   }
    01275
    01276   /* Check for bottom overflow */
    01277   y += ScaleByZoom(bp.height, dpi->zoom) - dpi->height;
    01278   if (y > 0) {
    01279     bp.height -= UnScaleByZoom(y, dpi->zoom);
    01280     if (bp.height <= 0) return;
    01281   }
    01282
    01283   x -= dpi->left;
    01284   /* Check for left overflow */
    01285   if (x < 0) {
    01286     bp.width -= -UnScaleByZoom(x, dpi->zoom);
    01287     if (bp.width <= 0) return;
    01288     bp.skip_left += -UnScaleByZoom(x, dpi->zoom);
    01289     x = 0;
    01290   } else {
    01291     bp.left = UnScaleByZoom(x, dpi->zoom);
    01292   }
    01293
    01294   /* Check for right overflow */
    01295   x += ScaleByZoom(bp.width, dpi->zoom) - dpi->width;
    01296   if (x > 0) {
    01297     bp.width -= UnScaleByZoom(x, dpi->zoom);
    01298     if (bp.width <= 0) return;
    01299   }
    01300
    01301   assert(bp.skip_left + bp.width <= UnScaleByZoom(sprite->width, dpi->zoom));
    01302   assert(bp.skip_top + bp.height <= UnScaleByZoom(sprite->height, dpi->zoom));
    01303
    01304   /* We do not want to catch the mouse. However we also use that spritenumber for unknown (text) sprites. */
    01305   if (_newgrf_debug_sprite_picker.mode == SPM_REDRAW && sprite_id != SPR_CURSOR_MOUSE) {
    01306     Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01307     void *topleft = blitter->MoveTo(bp.dst, bp.left, bp.top);
    01308     void *bottomright = blitter->MoveTo(topleft, bp.width - 1, bp.height - 1);
    01309
    01310     void *clicked = _newgrf_debug_sprite_picker.clicked_pixel;
    01311
    01312     if (topleft <= clicked && clicked <= bottomright) {
    01313       uint offset = (((size_t)clicked - (size_t)topleft) / (blitter->GetScreenDepth() / 8)) % bp.pitch;
    01314       if (offset < (uint)bp.width) {
    01315         _newgrf_debug_sprite_picker.sprites.Include(sprite_id);
    01316       }
    01317     }
    01318   }
    01319
    01320   BlitterFactoryBase::GetCurrentBlitter()->Draw(&bp, mode, dpi->zoom);
    01321 }
    01322
    01323 static void GfxMainBlitter(const Sprite *sprite, int x, int y, BlitterMode mode, const SubSprite *sub, SpriteID sprite_id, ZoomLevel zoom)
    01324 {
    01325   const DrawPixelInfo *dpi = _cur_dpi;
    01326   Blitter::BlitterParams bp;
    01327
    01328   /* Amount of pixels to clip from the source sprite */
    01329   int clip_left   = (sub != NULL ? max(0,                   -sprite->x_offs + sub->left       ) : 0);
    01330   int clip_top    = (sub != NULL ? max(0,                   -sprite->y_offs + sub->top        ) : 0);
    01331   int clip_right  = (sub != NULL ? max(0, sprite->width  - (-sprite->x_offs + sub->right  + 1)) : 0);
    01332   int clip_bottom = (sub != NULL ? max(0, sprite->height - (-sprite->y_offs + sub->bottom + 1)) : 0);
    01333
    01334   if (clip_left + clip_right >= sprite->width) return;
    01335   if (clip_top + clip_bottom >= sprite->height) return;
    01336
    01337   /* Scale it */
    01338   x = ScaleByZoom(x, zoom);
    01339   y = ScaleByZoom(y, zoom);
    01340
    01341   /* Move to the correct offset */
    01342   x += sprite->x_offs;
    01343   y += sprite->y_offs;
    01344
    01345   /* Copy the main data directly from the sprite */
    01346   bp.sprite = sprite->data;
    01347   bp.sprite_width = sprite->width;
    01348   bp.sprite_height = sprite->height;
    01349   bp.width = UnScaleByZoom(sprite->width - clip_left - clip_right, zoom);
    01350   bp.height = UnScaleByZoom(sprite->height - clip_top - clip_bottom, zoom);
    01351   bp.top = 0;
    01352   bp.left = 0;
    01353   bp.skip_left = UnScaleByZoomLower(clip_left, zoom);
    01354   bp.skip_top = UnScaleByZoomLower(clip_top, zoom);
    01355
    01356   x += ScaleByZoom(bp.skip_left, zoom);
    01357   y += ScaleByZoom(bp.skip_top, zoom);
    01358
    01359   bp.dst = dpi->dst_ptr;
    01360   bp.pitch = dpi->pitch;
    01361   bp.remap = _colour_remap_ptr;
    01362
    01363   assert(sprite->width > 0);
    01364   assert(sprite->height > 0);
    01365
    01366   if (bp.width <= 0) return;
    01367   if (bp.height <= 0) return;
    01368
    01369   y -= ScaleByZoom(dpi->top, zoom);
    01370   /* Check for top overflow */
    01371   if (y < 0) {
    01372     bp.height -= -UnScaleByZoom(y, zoom);
    01373     if (bp.height <= 0) return;
    01374     bp.skip_top += -UnScaleByZoom(y, zoom);
    01375     y = 0;
    01376   } else {
    01377     bp.top = UnScaleByZoom(y, zoom);
    01378   }
    01379
    01380   /* Check for bottom overflow */
    01381   y += ScaleByZoom(bp.height - dpi->height, zoom);
    01382   if (y > 0) {
    01383     bp.height -= UnScaleByZoom(y, zoom);
    01384     if (bp.height <= 0) return;
    01385   }
    01386
    01387   x -= ScaleByZoom(dpi->left, zoom);
    01388   /* Check for left overflow */
    01389   if (x < 0) {
    01390     bp.width -= -UnScaleByZoom(x, zoom);
    01391     if (bp.width <= 0) return;
    01392     bp.skip_left += -UnScaleByZoom(x, zoom);
    01393     x = 0;
    01394   } else {
    01395     bp.left = UnScaleByZoom(x, zoom);
    01396   }
    01397
    01398   /* Check for right overflow */
    01399   x += ScaleByZoom(bp.width - dpi->width, zoom);
    01400   if (x > 0) {
    01401     bp.width -= UnScaleByZoom(x, zoom);
    01402     if (bp.width <= 0) return;
    01403   }
    01404
    01405   assert(bp.skip_left + bp.width <= UnScaleByZoom(sprite->width, zoom));
    01406   assert(bp.skip_top + bp.height <= UnScaleByZoom(sprite->height, zoom));
    01407
    01408   /* We do not want to catch the mouse. However we also use that spritenumber for unknown (text) sprites. */
    01409   if (_newgrf_debug_sprite_picker.mode == SPM_REDRAW && sprite_id != SPR_CURSOR_MOUSE) {
    01410     Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01411     void *topleft = blitter->MoveTo(bp.dst, bp.left, bp.top);
    01412     void *bottomright = blitter->MoveTo(topleft, bp.width - 1, bp.height - 1);
    01413
    01414     void *clicked = _newgrf_debug_sprite_picker.clicked_pixel;
    01415
    01416     if (topleft <= clicked && clicked <= bottomright) {
    01417       uint offset = (((size_t)clicked - (size_t)topleft) / (blitter->GetScreenDepth() / 8)) % bp.pitch;
    01418       if (offset < (uint)bp.width) {
    01419         _newgrf_debug_sprite_picker.sprites.Include(sprite_id);
    01420       }
    01421     }
    01422   }
    01423
    01424   BlitterFactoryBase::GetCurrentBlitter()->Draw(&bp, mode, zoom);
    01425 }
    01426
    01427 void DoPaletteAnimations();
    01428
    01429 void GfxInitPalettes()
    01430 {
    01431   memcpy(&_cur_palette, &_palette, sizeof(_cur_palette));
    01432   DoPaletteAnimations();
    01433 }
    01434
    01435 #define EXTR(p, q) (((uint16)(palette_animation_counter * (p)) * (q)) >> 16)
    01436 #define EXTR2(p, q) (((uint16)(~palette_animation_counter * (p)) * (q)) >> 16)
    01437
    01438 void DoPaletteAnimations()
    01439 {
    01440   /* Animation counter for the palette animation. */
    01441   static int palette_animation_counter = 0;
    01442   palette_animation_counter += 8;
    01443
    01444   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01445   const Colour *s;
    01446   const ExtraPaletteValues *ev = &_extra_palette_values;
    01447   Colour old_val[PALETTE_ANIM_SIZE];
    01448   const uint old_tc = palette_animation_counter;
    01449   uint i;
    01450   uint j;
    01451
    01452   if (blitter != NULL && blitter->UsePaletteAnimation() == Blitter::PALETTE_ANIMATION_NONE) {
    01453     palette_animation_counter = 0;
    01454   }
    01455
    01456   Colour *palette_pos = &_cur_palette.palette[PALETTE_ANIM_START];  // Points to where animations are taking place on the palette
    01457   /* Makes a copy of the current anmation palette in old_val,
    01458    * so the work on the current palette could be compared, see if there has been any changes */
    01459   memcpy(old_val, palette_pos, sizeof(old_val));
    01460
    01461   /* Fizzy Drink bubbles animation */
    01462   s = ev->fizzy_drink;
    01463   j = EXTR2(512, EPV_CYCLES_FIZZY_DRINK);
    01464   for (i = 0; i != EPV_CYCLES_FIZZY_DRINK; i++) {
    01465     *palette_pos++ = s[j];
    01466     j++;
    01467     if (j == EPV_CYCLES_FIZZY_DRINK) j = 0;
    01468   }
    01469
    01470   /* Oil refinery fire animation */
    01471   s = ev->oil_refinery;
    01472   j = EXTR2(512, EPV_CYCLES_OIL_REFINERY);
    01473   for (i = 0; i != EPV_CYCLES_OIL_REFINERY; i++) {
    01474     *palette_pos++ = s[j];
    01475     j++;
    01476     if (j == EPV_CYCLES_OIL_REFINERY) j = 0;
    01477   }
    01478
    01479   /* Radio tower blinking */
    01480   {
    01481     byte i = (palette_animation_counter >> 1) & 0x7F;
    01482     byte v;
    01483
    01484     if (i < 0x3f) {
    01485       v = 255;
    01486     } else if (i < 0x4A || i >= 0x75) {
    01487       v = 128;
    01488     } else {
    01489       v = 20;
    01490     }
    01491     palette_pos->r = v;
    01492     palette_pos->g = 0;
    01493     palette_pos->b = 0;
    01494     palette_pos++;
    01495
    01496     i ^= 0x40;
    01497     if (i < 0x3f) {
    01498       v = 255;
    01499     } else if (i < 0x4A || i >= 0x75) {
    01500       v = 128;
    01501     } else {
    01502       v = 20;
    01503     }
    01504     palette_pos->r = v;
    01505     palette_pos->g = 0;
    01506     palette_pos->b = 0;
    01507     palette_pos++;
    01508   }
    01509
    01510   /* Handle lighthouse and stadium animation */
    01511   s = ev->lighthouse;
    01512   j = EXTR(256, EPV_CYCLES_LIGHTHOUSE);
    01513   for (i = 0; i != EPV_CYCLES_LIGHTHOUSE; i++) {
    01514     *palette_pos++ = s[j];
    01515     j++;
    01516     if (j == EPV_CYCLES_LIGHTHOUSE) j = 0;
    01517   }
    01518
    01519   /* Dark blue water */
    01520   s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->dark_water_toyland : ev->dark_water;
    01521   j = EXTR(320, EPV_CYCLES_DARK_WATER);
    01522   for (i = 0; i != EPV_CYCLES_DARK_WATER; i++) {
    01523     *palette_pos++ = s[j];
    01524     j++;
    01525     if (j == EPV_CYCLES_DARK_WATER) j = 0;
    01526   }
    01527
    01528   /* Glittery water */
    01529   s = (_settings_game.game_creation.landscape == LT_TOYLAND) ? ev->glitter_water_toyland : ev->glitter_water;
    01530   j = EXTR(128, EPV_CYCLES_GLITTER_WATER);
    01531   for (i = 0; i != EPV_CYCLES_GLITTER_WATER / 3; i++) {
    01532     *palette_pos++ = s[j];
    01533     j += 3;
    01534     if (j >= EPV_CYCLES_GLITTER_WATER) j -= EPV_CYCLES_GLITTER_WATER;
    01535   }
    01536
    01537   if (blitter != NULL && blitter->UsePaletteAnimation() == Blitter::PALETTE_ANIMATION_NONE) {
    01538     palette_animation_counter = old_tc;
    01539   } else {
    01540     if (memcmp(old_val, &_cur_palette.palette[PALETTE_ANIM_START], sizeof(old_val)) != 0 && _cur_palette.count_dirty == 0) {
    01541       /* Did we changed anything on the palette? Seems so.  Mark it as dirty */
    01542       _cur_palette.first_dirty = PALETTE_ANIM_START;
    01543       _cur_palette.count_dirty = PALETTE_ANIM_SIZE;
    01544     }
    01545   }
    01546 }
    01547
    01548
    01553 void LoadStringWidthTable(bool monospace)
    01554 {
    01555   for (FontSize fs = monospace ? FS_MONO : FS_BEGIN; fs < (monospace ? FS_END : FS_MONO); fs++) {
    01556     _max_char_size[fs].width = 0;
    01557     _max_char_size[fs].height = GetCharacterHeight(fs);
    01558     for (uint i = 0; i != 224; i++) {
    01559       _stringwidth_table[fs][i] = GetGlyphWidth(fs, i + 32);
    01560       _max_char_size[fs].width = max<int>(_max_char_size[fs].width, _stringwidth_table[fs][i]);
    01561     }
    01562
    01563     /* Needed because they need to be 1 more than the widest. */
    01564     _max_char_size[fs].width++;
    01565     _max_char_size[fs].height++;
    01566   }
    01567
    01568   _max_char_width  = 0;
    01569   _max_char_height = 0;
    01570   for (FontSize fs = FS_BEGIN; fs < FS_END; fs++) {
    01571     _max_char_width = max<int>(_max_char_width, _max_char_size[fs].width);
    01572     _max_char_height = max<int>(_max_char_height, _max_char_size[fs].height);
    01573   }
    01574
    01575   ReInitAllWindows();
    01576 }
    01577
    01584 byte GetCharacterWidth(FontSize size, WChar key)
    01585 {
    01586   /* Use _stringwidth_table cache if possible */
    01587   if (key >= 32 && key < 256) return _stringwidth_table[size][key - 32];
    01588
    01589   return GetGlyphWidth(size, key);
    01590 }
    01591
    01597 byte GetDigitWidth(FontSize size)
    01598 {
    01599   byte width = 0;
    01600   for (char c = '0'; c <= '9'; c++) {
    01601     width = max(GetCharacterWidth(size, c), width);
    01602   }
    01603   return width;
    01604 }
    01605
    01606
    01607 void ScreenSizeChanged()
    01608 {
    01609   _dirty_bytes_per_line = CeilDiv(_screen.width, DIRTY_BLOCK_WIDTH);
    01610   _dirty_blocks = ReallocT<byte>(_dirty_blocks, _dirty_bytes_per_line * CeilDiv(_screen.height, DIRTY_BLOCK_HEIGHT));
    01611
    01612   /* check the dirty rect */
    01613   if (_invalid_rect.right >= _screen.width) _invalid_rect.right = _screen.width;
    01614   if (_invalid_rect.bottom >= _screen.height) _invalid_rect.bottom = _screen.height;
    01615
    01616   /* screen size changed and the old bitmap is invalid now, so we don't want to undraw it */
    01617   _cursor.visible = false;
    01618 }
    01619
    01620 void UndrawMouseCursor()
    01621 {
    01622   /* Don't undraw the mouse cursor if the screen is not ready */
    01623   if (_screen.dst_ptr == NULL) return;
    01624
    01625   if (_cursor.visible) {
    01626     Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01627     _cursor.visible = false;
    01628     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);
    01629     _video_driver->MakeDirty(_cursor.draw_pos.x, _cursor.draw_pos.y, _cursor.draw_size.x, _cursor.draw_size.y);
    01630   }
    01631 }
    01632
    01633 void DrawMouseCursor()
    01634 {
    01635 #if defined(WINCE)
    01636   /* Don't ever draw the mouse for WinCE, as we work with a stylus */
    01637   return;
    01638 #endif
    01639
    01640   /* Don't draw the mouse cursor if the screen is not ready */
    01641   if (_screen.dst_ptr == NULL) return;
    01642
    01643   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01644   int x;
    01645   int y;
    01646   int w;
    01647   int h;
    01648
    01649   /* Redraw mouse cursor but only when it's inside the window */
    01650   if (!_cursor.in_window) return;
    01651
    01652   /* Don't draw the mouse cursor if it's already drawn */
    01653   if (_cursor.visible) {
    01654     if (!_cursor.dirty) return;
    01655     UndrawMouseCursor();
    01656   }
    01657
    01658   w = _cursor.size.x;
    01659   x = _cursor.pos.x + _cursor.offs.x + _cursor.short_vehicle_offset;
    01660   if (x < 0) {
    01661     w += x;
    01662     x = 0;
    01663   }
    01664   if (w > _screen.width - x) w = _screen.width - x;
    01665   if (w <= 0) return;
    01666   _cursor.draw_pos.x = x;
    01667   _cursor.draw_size.x = w;
    01668
    01669   h = _cursor.size.y;
    01670   y = _cursor.pos.y + _cursor.offs.y;
    01671   if (y < 0) {
    01672     h += y;
    01673     y = 0;
    01674   }
    01675   if (h > _screen.height - y) h = _screen.height - y;
    01676   if (h <= 0) return;
    01677   _cursor.draw_pos.y = y;
    01678   _cursor.draw_size.y = h;
    01679
    01680   uint8 *buffer = _cursor_backup.Allocate(blitter->BufferSize(w, h));
    01681
    01682   /* Make backup of stuff below cursor */
    01683   blitter->CopyToBuffer(blitter->MoveTo(_screen.dst_ptr, _cursor.draw_pos.x, _cursor.draw_pos.y), buffer, _cursor.draw_size.x, _cursor.draw_size.y);
    01684
    01685   /* Draw cursor on screen */
    01686   _cur_dpi = &_screen;
    01687   DrawSprite(_cursor.sprite, _cursor.pal, _cursor.pos.x + _cursor.short_vehicle_offset, _cursor.pos.y);
    01688
    01689   _video_driver->MakeDirty(_cursor.draw_pos.x, _cursor.draw_pos.y, _cursor.draw_size.x, _cursor.draw_size.y);
    01690
    01691   _cursor.visible = true;
    01692   _cursor.dirty = false;
    01693 }
    01694
    01695 void RedrawScreenRect(int left, int top, int right, int bottom)
    01696 {
    01697   assert(right <= _screen.width && bottom <= _screen.height);
    01698   if (_cursor.visible) {
    01699     if (right > _cursor.draw_pos.x &&
    01700         left < _cursor.draw_pos.x + _cursor.draw_size.x &&
    01701         bottom > _cursor.draw_pos.y &&
    01702         top < _cursor.draw_pos.y + _cursor.draw_size.y) {
    01703       UndrawMouseCursor();
    01704     }
    01705   }
    01706
    01707 #ifdef ENABLE_NETWORK
    01708   if (_networking) NetworkUndrawChatMessage();
    01709 #endif /* ENABLE_NETWORK */
    01710
    01711   DrawOverlappedWindowForAll(left, top, right, bottom);
    01712
    01713   _video_driver->MakeDirty(left, top, right - left, bottom - top);
    01714 }
    01715
    01721 void DrawDirtyBlocks()
    01722 {
    01723   byte *b = _dirty_blocks;
    01724   const int w = Align(_screen.width,  DIRTY_BLOCK_WIDTH);
    01725   const int h = Align(_screen.height, DIRTY_BLOCK_HEIGHT);
    01726   int x;
    01727   int y;
    01728
    01729   if (HasModalProgress()) {
    01730     /* We are generating the world, so release our rights to the map and
    01731      * painting while we are waiting a bit. */
    01732     _modal_progress_paint_mutex->EndCritical();
    01733     _modal_progress_work_mutex->EndCritical();
    01734
    01735     /* Wait a while and update _realtime_tick so we are given the rights */
    01736     if (!IsFirstModalProgressLoop()) CSleep(MODAL_PROGRESS_REDRAW_TIMEOUT);
    01737     _realtime_tick += MODAL_PROGRESS_REDRAW_TIMEOUT;
    01738     _modal_progress_paint_mutex->BeginCritical();
    01739     _modal_progress_work_mutex->BeginCritical();
    01740
    01741     /* When we ended with the modal progress, do not draw the blocks.
    01742      * Simply let the next run do so, otherwise we would be loading
    01743      * the new state (and possibly change the blitter) when we hold
    01744      * the drawing lock, which we must not do. */
    01745     if (_switch_mode != SM_NONE && !HasModalProgress()) return;
    01746   }
    01747
    01748   y = 0;
    01749   do {
    01750     x = 0;
    01751     do {
    01752       if (*b != 0) {
    01753         int left;
    01754         int top;
    01755         int right = x + DIRTY_BLOCK_WIDTH;
    01756         int bottom = y;
    01757         byte *p = b;
    01758         int h2;
    01759
    01760         /* First try coalescing downwards */
    01761         do {
    01762           *p = 0;
    01763           p += _dirty_bytes_per_line;
    01764           bottom += DIRTY_BLOCK_HEIGHT;
    01765         } while (bottom != h && *p != 0);
    01766
    01767         /* Try coalescing to the right too. */
    01768         h2 = (bottom - y) / DIRTY_BLOCK_HEIGHT;
    01769         assert(h2 > 0);
    01770         p = b;
    01771
    01772         while (right != w) {
    01773           byte *p2 = ++p;
    01774           int h = h2;
    01775           /* Check if a full line of dirty flags is set. */
    01776           do {
    01777             if (!*p2) goto no_more_coalesc;
    01778             p2 += _dirty_bytes_per_line;
    01779           } while (--h != 0);
    01780
    01781           /* Wohoo, can combine it one step to the right!
    01782            * Do that, and clear the bits. */
    01783           right += DIRTY_BLOCK_WIDTH;
    01784
    01785           h = h2;
    01786           p2 = p;
    01787           do {
    01788             *p2 = 0;
    01789             p2 += _dirty_bytes_per_line;
    01790           } while (--h != 0);
    01791         }
    01792         no_more_coalesc:
    01793
    01794         left = x;
    01795         top = y;
    01796
    01797         if (left   < _invalid_rect.left  ) left   = _invalid_rect.left;
    01798         if (top    < _invalid_rect.top   ) top    = _invalid_rect.top;
    01799         if (right  > _invalid_rect.right ) right  = _invalid_rect.right;
    01800         if (bottom > _invalid_rect.bottom) bottom = _invalid_rect.bottom;
    01801
    01802         if (left < right && top < bottom) {
    01803           RedrawScreenRect(left, top, right, bottom);
    01804         }
    01805
    01806       }
    01807     } while (b++, (x += DIRTY_BLOCK_WIDTH) != w);
    01808   } while (b += -(int)(w / DIRTY_BLOCK_WIDTH) + _dirty_bytes_per_line, (y += DIRTY_BLOCK_HEIGHT) != h);
    01809
    01810   _invalid_rect.left = w;
    01811   _invalid_rect.top = h;
    01812   _invalid_rect.right = 0;
    01813   _invalid_rect.bottom = 0;
    01814 }
    01815
    01831 void SetDirtyBlocks(int left, int top, int right, int bottom)
    01832 {
    01833   byte *b;
    01834   int width;
    01835   int height;
    01836
    01837   if (left < 0) left = 0;
    01838   if (top < 0) top = 0;
    01839   if (right > _screen.width) right = _screen.width;
    01840   if (bottom > _screen.height) bottom = _screen.height;
    01841
    01842   if (left >= right || top >= bottom) return;
    01843
    01844   if (left   < _invalid_rect.left  ) _invalid_rect.left   = left;
    01845   if (top    < _invalid_rect.top   ) _invalid_rect.top    = top;
    01846   if (right  > _invalid_rect.right ) _invalid_rect.right  = right;
    01847   if (bottom > _invalid_rect.bottom) _invalid_rect.bottom = bottom;
    01848
    01849   left /= DIRTY_BLOCK_WIDTH;
    01850   top  /= DIRTY_BLOCK_HEIGHT;
    01851
    01852   b = _dirty_blocks + top * _dirty_bytes_per_line + left;
    01853
    01854   width  = ((right  - 1) / DIRTY_BLOCK_WIDTH)  - left + 1;
    01855   height = ((bottom - 1) / DIRTY_BLOCK_HEIGHT) - top  + 1;
    01856
    01857   assert(width > 0 && height > 0);
    01858
    01859   do {
    01860     int i = width;
    01861
    01862     do b[--i] = 0xFF; while (i != 0);
    01863
    01864     b += _dirty_bytes_per_line;
    01865   } while (--height != 0);
    01866 }
    01867
    01874 void MarkWholeScreenDirty()
    01875 {
    01876   SetDirtyBlocks(0, 0, _screen.width, _screen.height);
    01877 }
    01878
    01893 bool FillDrawPixelInfo(DrawPixelInfo *n, int left, int top, int width, int height)
    01894 {
    01895   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01896   const DrawPixelInfo *o = _cur_dpi;
    01897
    01898   n->zoom = ZOOM_LVL_NORMAL;
    01899
    01900   assert(width > 0);
    01901   assert(height > 0);
    01902
    01903   if ((left -= o->left) < 0) {
    01904     width += left;
    01905     if (width <= 0) return false;
    01906     n->left = -left;
    01907     left = 0;
    01908   } else {
    01909     n->left = 0;
    01910   }
    01911
    01912   if (width > o->width - left) {
    01913     width = o->width - left;
    01914     if (width <= 0) return false;
    01915   }
    01916   n->width = width;
    01917
    01918   if ((top -= o->top) < 0) {
    01919     height += top;
    01920     if (height <= 0) return false;
    01921     n->top = -top;
    01922     top = 0;
    01923   } else {
    01924     n->top = 0;
    01925   }
    01926
    01927   n->dst_ptr = blitter->MoveTo(o->dst_ptr, left, top);
    01928   n->pitch = o->pitch;
    01929
    01930   if (height > o->height - top) {
    01931     height = o->height - top;
    01932     if (height <= 0) return false;
    01933   }
    01934   n->height = height;
    01935
    01936   return true;
    01937 }
    01938
    01943 void UpdateCursorSize()
    01944 {
    01945   CursorVars *cv = &_cursor;
    01946   const Sprite *p = GetSprite(GB(cv->sprite, 0, SPRITE_WIDTH), ST_NORMAL);
    01947
    01948   cv->size.y = UnScaleByZoom(p->height, ZOOM_LVL_GUI);
    01949   cv->size.x = UnScaleByZoom(p->width, ZOOM_LVL_GUI);
    01950   cv->offs.x = UnScaleByZoom(p->x_offs, ZOOM_LVL_GUI);
    01951   cv->offs.y = UnScaleByZoom(p->y_offs, ZOOM_LVL_GUI);
    01952
    01953   cv->dirty = true;
    01954 }
    01955
    01961 static void SetCursorSprite(CursorID cursor, PaletteID pal)
    01962 {
    01963   CursorVars *cv = &_cursor;
    01964   if (cv->sprite == cursor) return;
    01965
    01966   cv->sprite = cursor;
    01967   cv->pal    = pal;
    01968   UpdateCursorSize();
    01969
    01970   cv->short_vehicle_offset = 0;
    01971 }
    01972
    01973 static void SwitchAnimatedCursor()
    01974 {
    01975   const AnimCursor *cur = _cursor.animate_cur;
    01976
    01977   if (cur == NULL || cur->sprite == AnimCursor::LAST) cur = _cursor.animate_list;
    01978
    01979   SetCursorSprite(cur->sprite, _cursor.pal);
    01980
    01981   _cursor.animate_timeout = cur->display_time;
    01982   _cursor.animate_cur     = cur + 1;
    01983 }
    01984
    01985 void CursorTick()
    01986 {
    01987   if (_cursor.animate_timeout != 0 && --_cursor.animate_timeout == 0) {
    01988     SwitchAnimatedCursor();
    01989   }
    01990 }
    01991
    01998 void SetMouseCursor(CursorID sprite, PaletteID pal)
    01999 {
    02000   /* Turn off animation */
    02001   _cursor.animate_timeout = 0;
    02002   /* Set cursor */
    02003   SetCursorSprite(sprite, pal);
    02004 }
    02005
    02011 void SetAnimatedMouseCursor(const AnimCursor *table)
    02012 {
    02013   _cursor.animate_list = table;
    02014   _cursor.animate_cur = NULL;
    02015   _cursor.pal = PAL_NONE;
    02016   SwitchAnimatedCursor();
    02017 }
    02018
    02019 bool ChangeResInGame(int width, int height)
    02020 {
    02021   return (_screen.width == width && _screen.height == height) || _video_driver->ChangeResolution(width, height);
    02022 }
    02023
    02024 bool ToggleFullScreen(bool fs)
    02025 {
    02026   bool result = _video_driver->ToggleFullscreen(fs);
    02027   if (_fullscreen != fs && _num_resolutions == 0) {
    02028     DEBUG(driver, 0, "Could not find a suitable fullscreen resolution");
    02029   }
    02030   return result;
    02031 }
    02032
    02033 static int CDECL compare_res(const Dimension *pa, const Dimension *pb)
    02034 {
    02035   int x = pa->width - pb->width;
    02036   if (x != 0) return x;
    02037   return pa->height - pb->height;
    02038 }
    02039
    02040 void SortResolutions(int count)
    02041 {
    02042   QSortT(_resolutions, count, &compare_res);
    02043 }