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/* $Id$ */

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/** @file gfx.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "functions.h"

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#include "macros.h"

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#include "spritecache.h"

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#include "strings.h"

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#include "string.h"

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#include "gfx.h"

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#include "table/palettes.h"

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#include "table/sprites.h"

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#include "hal.h"

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#include "variables.h"

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#include "table/control_codes.h"

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#include "fontcache.h"

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#include "genworld.h"

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#include "debug.h"

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#include "zoom.hpp"

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    24

#ifdef _DEBUG

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bool _dbg_screen_rect;

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#endif

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byte _dirkeys;        ///< 1 = left, 2 = up, 4 = right, 8 = down

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bool _fullscreen;

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CursorVars _cursor;

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bool _ctrl_pressed;   ///< Is Ctrl pressed?

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bool _shift_pressed;  ///< Is Shift pressed?

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byte _fast_forward;

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bool _left_button_down;

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bool _left_button_clicked;

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bool _right_button_down;

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bool _right_button_clicked;

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DrawPixelInfo _screen;

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bool _exit_game;

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bool _networking;         ///< are we in networking mode?

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byte _game_mode;

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byte _pause_game;

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int _pal_first_dirty;

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int _pal_last_dirty;

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Colour _cur_palette[256];

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byte _stringwidth_table[FS_END][224];

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static void GfxMainBlitter(const Sprite *sprite, int x, int y, BlitterMode mode);

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FontSize _cur_fontsize;

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static FontSize _last_fontsize;

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static Rect _invalid_rect;

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static const byte *_color_remap_ptr;

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static byte _string_colorremap[3];

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#define DIRTY_BYTES_PER_LINE (MAX_SCREEN_WIDTH / 64)

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static byte _dirty_blocks[DIRTY_BYTES_PER_LINE * MAX_SCREEN_HEIGHT / 8];

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    61

void GfxScroll(int left, int top, int width, int height, int xo, int yo)

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{

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	if (xo == 0 && yo == 0) return;

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    69

	if (_cursor.visible) UndrawMouseCursor();

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	UndrawTextMessage();

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    72

	if (yo > 0) {

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		/*Calculate pointers */

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    77

		/* Decrease height and increase top */

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		top += yo;

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		height -= yo;

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		assert(height > 0);

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    82

		/* Adjust left & width */

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		if (xo >= 0) {

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			left += xo;

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			width -= xo;

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		} else {

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			width += xo;

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		}

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    94

	} else {

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		/* Calculate pointers */

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    99

		/* Decrese height. (yo is <=0). */

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		height += yo;

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		assert(height > 0);

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   103

		/* Adjust left & width */

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		if (xo >= 0) {

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			left += xo;

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			width -= xo;

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		} else {

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			width += xo;

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		}

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   113

		/* the y-displacement may be 0 therefore we have to use memmove,

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		 * because source and destination may overlap */

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	}

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	/* This part of the screen is now dirty. */

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	_video_driver->make_dirty(left, top, width, height);

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}

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   121

   122

void GfxFillRect(int left, int top, int right, int bottom, int color)

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{

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	const int otop = top;

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	const int oleft = left;

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   130

	if (dpi->zoom != ZOOM_LVL_NORMAL) return;

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	if (left > right || top > bottom) return;

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	if (right < dpi->left || left >= dpi->left + dpi->width) return;

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	if (bottom < dpi->top || top >= dpi->top + dpi->height) return;

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   135

	if ( (left -= dpi->left) < 0) left = 0;

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	right = right - dpi->left + 1;

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	if (right > dpi->width) right = dpi->width;

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	right -= left;

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	assert(right > 0);

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   141

	if ( (top -= dpi->top) < 0) top = 0;

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	bottom = bottom - dpi->top + 1;

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	if (bottom > dpi->height) bottom = dpi->height;

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	bottom -= top;

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	assert(bottom > 0);

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   148

   149

	if (!HASBIT(color, PALETTE_MODIFIER_GREYOUT)) {

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		if (!HASBIT(color, USE_COLORTABLE)) {

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			do {

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			} while (--bottom);

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		} else {

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		}

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	} else {

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		byte bo = (oleft - left + dpi->left + otop - top + dpi->top) & 1;

   160

		do {

   163

		} while (--bottom > 0);

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	}

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}

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   167

static void GfxSetPixel(int x, int y, int color)

   168

{

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}

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   176

void GfxDrawLine(int x, int y, int x2, int y2, int color)

   177

{

   178

	int dy;

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	int dx;

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	int stepx;

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	int stepy;

   182

	int frac;

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   184

	/* Check clipping first */

   185

	{

   186

		DrawPixelInfo *dpi = _cur_dpi;

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		int t;

   188

   189

		if (x < dpi->left && x2 < dpi->left) return;

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   191

		if (y < dpi->top && y2 < dpi->top) return;

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   193

		t = dpi->left + dpi->width;

   194

		if (x > t && x2 > t) return;

   195

   196

		t = dpi->top + dpi->height;

   197

		if (y > t && y2 > t) return;

   198

	}

   199

   200

	dy = (y2 - y) * 2;

   201

	if (dy < 0) {

   202

		dy = -dy;

   203

		stepy = -1;

   204

	} else {

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		stepy = 1;

   206

	}

   207

   208

	dx = (x2 - x) * 2;

   209

	if (dx < 0) {

   210

		dx = -dx;

   211

		stepx = -1;

   212

	} else {

   213

		stepx = 1;

   214

	}

   215

   216

	GfxSetPixel(x, y, color);

   217

	if (dx > dy) {

   218

		frac = dy - (dx >> 1);

   219

		while (x != x2) {

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			if (frac >= 0) {

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				y += stepy;

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				frac -= dx;

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			}

   224

			x += stepx;

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			frac += dy;

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			GfxSetPixel(x, y, color);

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		}

   228

	} else {

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		frac = dx - (dy >> 1);

   230

		while (y != y2) {

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			if (frac >= 0) {

   232

				x += stepx;

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				frac -= dy;

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			}

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			y += stepy;

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			frac += dx;

   237

			GfxSetPixel(x, y, color);

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		}

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	}

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}

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/** Truncate a given string to a maximum width if neccessary.

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 * If the string is truncated, add three dots ('...') to show this.

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 * @param *str string that is checked and possibly truncated

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 * @param maxw maximum width in pixels of the string

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 * @return new width of (truncated) string */

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static int TruncateString(char *str, int maxw)

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{

   250

	int w = 0;

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	FontSize size = _cur_fontsize;

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	int ddd, ddd_w;

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   254

	WChar c;

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	char *ddd_pos;

   256

   257

	ddd_w = ddd = GetCharacterWidth(size, '.') * 3;

   258

   259

	for (ddd_pos = str; (c = Utf8Consume((const char **)&str)) != '\0'; ) {

   260

		if (IsPrintable(c)) {

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			w += GetCharacterWidth(size, c);

   262

   263

			if (w >= maxw) {

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				/* string got too big... insert dotdotdot */

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				ddd_pos[0] = ddd_pos[1] = ddd_pos[2] = '.';

   266

				ddd_pos[3] = '\0';

   267

				return ddd_w;

   268

			}

   269

		} else {

   270

			if (c == SCC_SETX) str++;

   271

			else if (c == SCC_SETXY) str += 2;

   272

			else if (c == SCC_TINYFONT) {

   273

				size = FS_SMALL;

   274

				ddd = GetCharacterWidth(size, '.') * 3;

   275

			} else if (c == SCC_BIGFONT) {

   276

				size = FS_LARGE;

   277

				ddd = GetCharacterWidth(size, '.') * 3;

   278

			}

   279

		}

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   281

		/* Remember the last position where three dots fit. */

   282

		if (w + ddd < maxw) {

   283

			ddd_w = w + ddd;

   284

			ddd_pos = str;

   285

		}

   286

	}

   287

   288

	return w;

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}

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   291

static inline int TruncateStringID(StringID src, char *dest, int maxw, const char* last)

   292

{

   293

	GetString(dest, src, last);

   294

	return TruncateString(dest, maxw);

   295

}

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   297

/* returns right coordinate */

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int DrawString(int x, int y, StringID str, uint16 color)

   299

{

   300

	char buffer[512];

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   302

	GetString(buffer, str, lastof(buffer));

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	return DoDrawString(buffer, x, y, color);

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}

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int DrawStringTruncated(int x, int y, StringID str, uint16 color, uint maxw)

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{

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	char buffer[512];

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	TruncateStringID(str, buffer, maxw, lastof(buffer));

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	return DoDrawString(buffer, x, y, color);

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}

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int DrawStringRightAligned(int x, int y, StringID str, uint16 color)

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{

   316

	char buffer[512];

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	int w;

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   319

	GetString(buffer, str, lastof(buffer));

   320

	w = GetStringBoundingBox(buffer).width;

   321

	DoDrawString(buffer, x - w, y, color);

   322

   323

	return w;

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}

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void DrawStringRightAlignedTruncated(int x, int y, StringID str, uint16 color, uint maxw)

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{

   328

	char buffer[512];

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   330

	TruncateStringID(str, buffer, maxw, lastof(buffer));

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	DoDrawString(buffer, x - GetStringBoundingBox(buffer).width, y, color);

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}

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void DrawStringRightAlignedUnderline(int x, int y, StringID str, uint16 color)

   335

{

   336

	int w = DrawStringRightAligned(x, y, str, color);

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	GfxFillRect(x - w, y + 10, x, y + 10, _string_colorremap[1]);

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}

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int DrawStringCentered(int x, int y, StringID str, uint16 color)

   342

{

   343

	char buffer[512];

   344

	int w;

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   346

	GetString(buffer, str, lastof(buffer));

   347

   348

	w = GetStringBoundingBox(buffer).width;

   349

	DoDrawString(buffer, x - w / 2, y, color);

   350

   351

	return w;

   352

}

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int DrawStringCenteredTruncated(int xl, int xr, int y, StringID str, uint16 color)

   355

{

   356

	char buffer[512];

   357

	int w = TruncateStringID(str, buffer, xr - xl, lastof(buffer));

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	return DoDrawString(buffer, (xl + xr - w) / 2, y, color);

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}

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   361

int DoDrawStringCentered(int x, int y, const char *str, uint16 color)

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{

   363

	int w = GetStringBoundingBox(str).width;

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	DoDrawString(str, x - w / 2, y, color);

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	return w;

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}

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void DrawStringCenterUnderline(int x, int y, StringID str, uint16 color)

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{

   370

	int w = DrawStringCentered(x, y, str, color);

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	GfxFillRect(x - (w >> 1), y + 10, x - (w >> 1) + w, y + 10, _string_colorremap[1]);

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}

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void DrawStringCenterUnderlineTruncated(int xl, int xr, int y, StringID str, uint16 color)

   375

{

   376

	int w = DrawStringCenteredTruncated(xl, xr, y, str, color);

   377

	GfxFillRect((xl + xr - w) / 2, y + 10, (xl + xr + w) / 2, y + 10, _string_colorremap[1]);

   378

}

   379

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/** 'Correct' a string to a maximum length. Longer strings will be cut into

   381

 * additional lines at whitespace characters if possible. The string parameter

   382

 * is modified with terminating characters mid-string which are the

   383

 * placeholders for the newlines.

   384

 * The string WILL be truncated if there was no whitespace for the current

   385

 * line's maximum width.

   386

 *

   387

 * @note To know if the terminating '\0' is the string end or just a

   388

 * newline, the returned 'num' value should be consulted. The num'th '\0',

   389

 * starting with index 0 is the real string end.

   390

 *

   391

 * @param str string to check and correct for length restrictions

   392

 * @param maxw the maximum width the string can have on one line

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 * @return return a 32bit wide number consisting of 2 packed values:

   394

 *  0 - 15 the number of lines ADDED to the string

   395

 * 16 - 31 the fontsize in which the length calculation was done at */

   396

uint32 FormatStringLinebreaks(char *str, int maxw)

   397

{

   398

	FontSize size = _cur_fontsize;

   399

	int num = 0;

   400

   401

	assert(maxw > 0);

   402

   403

	for (;;) {

   404

		char *last_space = NULL;

   405

		int w = 0;

   406

   407

		for (;;) {

   408

			WChar c = Utf8Consume((const char **)&str);

   409

			/* whitespace is where we will insert the line-break */

   410

			if (IsWhitespace(c)) last_space = str;

   411

   412

			if (IsPrintable(c)) {

   413

				w += GetCharacterWidth(size, c);

   414

				/* string is longer than maximum width so we need to decide what to

   415

				 * do. We can do two things:

   416

				 * 1. If no whitespace was found at all up until now (on this line) then

   417

				 *    we will truncate the string and bail out.

   418

				 * 2. In all other cases force a linebreak at the last seen whitespace */

   419

				if (w > maxw) {

   420

					if (last_space == NULL) {

   421

						*Utf8PrevChar(str) = '\0';

   422

						return num + (size << 16);

   423

					}

   424

					str = last_space;

   425

					break;

   426

				}

   427

			} else {

   428

				switch (c) {

   429

					case '\0': return num + (size << 16); break;

   430

					case SCC_SETX:  str++; break;

   431

					case SCC_SETXY: str += 2; break;

   432

					case SCC_TINYFONT: size = FS_SMALL; break;

   433

					case SCC_BIGFONT:  size = FS_LARGE; break;

   434

					case '\n': goto end_of_inner_loop;

   435

				}

   436

			}

   437

		}

   438

end_of_inner_loop:

   439

		/* String didn't fit on line (or a '\n' was encountered), so 'dummy' terminate

   440

		 * and increase linecount. We use Utf8PrevChar() as also non 1 char long

   441

		 * whitespace seperators are supported */

   442

		num++;

   443

		char *s = Utf8PrevChar(str);

   444

		*s++ = '\0';

   445

   446

		/* In which case (see above) we will shift remainder to left and close the gap */

   447

		if (str - s >= 1) {

   448

			for (; str[-1] != '\0';) *s++ = *str++;

   449

		}

   450

	}

   451

}

   452

   453

/** Draw a given string with the centre around the given x coordinates

   454

 * @param x Centre the string around this pixel width

   455

 * @param y Draw the string at this pixel height (first line's bottom)

   456

 * @param str String to draw

   457

 * @param maxw Maximum width the string can have before it is wrapped */

   458

void DrawStringMultiCenter(int x, int y, StringID str, int maxw)

   459

{

   460

	char buffer[512];

   461

	uint32 tmp;

   462

	int num, w, mt;

   463

	const char *src;

   464

	WChar c;

   465

   466

	GetString(buffer, str, lastof(buffer));

   467

   468

	tmp = FormatStringLinebreaks(buffer, maxw);

   469

	num = GB(tmp, 0, 16);

   470

   471

	mt = GetCharacterHeight((FontSize)GB(tmp, 16, 16));

   472

   473

	y -= (mt >> 1) * num;

   474

   475

	src = buffer;

   476

   477

	for (;;) {

   478

		w = GetStringBoundingBox(src).width;

   479

		DoDrawString(src, x - (w >> 1), y, 0xFE);

   480

		_cur_fontsize = _last_fontsize;

   481

   482

		for (;;) {

   483

			c = Utf8Consume(&src);

   484

			if (c == 0) {

   485

				y += mt;

   486

				if (--num < 0) {

   487

					_cur_fontsize = FS_NORMAL;

   488

					return;

   489

				}

   490

				break;