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00012 #include "stdafx.h"
00013 #include "heightmap.h"
00014 #include "clear_map.h"
00015 #include "void_map.h"
00016 #include "gui.h"
00017 #include "saveload/saveload.h"
00018 #include "bmp.h"
00019 #include "gfx_func.h"
00020 #include "fios.h"
00021 #include "fileio_func.h"
00022
00023 #include "table/strings.h"
00024
00030 static inline byte RGBToGrayscale(byte red, byte green, byte blue)
00031 {
00032
00033
00034 return ((red * 19595) + (green * 38470) + (blue * 7471)) / 65536;
00035 }
00036
00037
00038 #ifdef WITH_PNG
00039
00040 #include <png.h>
00041
00045 static void ReadHeightmapPNGImageData(byte *map, png_structp png_ptr, png_infop info_ptr)
00046 {
00047 uint x, y;
00048 byte gray_palette[256];
00049 png_bytep *row_pointers = NULL;
00050
00051
00052 if (png_get_color_type(png_ptr, info_ptr) == PNG_COLOR_TYPE_PALETTE) {
00053 int i;
00054 int palette_size;
00055 png_color *palette;
00056 bool all_gray = true;
00057
00058 png_get_PLTE(png_ptr, info_ptr, &palette, &palette_size);
00059 for (i = 0; i < palette_size && (palette_size != 16 || all_gray); i++) {
00060 all_gray &= palette[i].red == palette[i].green && palette[i].red == palette[i].blue;
00061 gray_palette[i] = RGBToGrayscale(palette[i].red, palette[i].green, palette[i].blue);
00062 }
00063
00070 if (palette_size == 16 && !all_gray) {
00071 for (i = 0; i < palette_size; i++) {
00072 gray_palette[i] = 256 * i / palette_size;
00073 }
00074 }
00075 }
00076
00077 row_pointers = png_get_rows(png_ptr, info_ptr);
00078
00079
00080 for (x = 0; x < png_get_image_width(png_ptr, info_ptr); x++) {
00081 for (y = 0; y < png_get_image_height(png_ptr, info_ptr); y++) {
00082 byte *pixel = &map[y * png_get_image_width(png_ptr, info_ptr) + x];
00083 uint x_offset = x * png_get_channels(png_ptr, info_ptr);
00084
00085 if (png_get_color_type(png_ptr, info_ptr) == PNG_COLOR_TYPE_PALETTE) {
00086 *pixel = gray_palette[row_pointers[y][x_offset]];
00087 } else if (png_get_channels(png_ptr, info_ptr) == 3) {
00088 *pixel = RGBToGrayscale(row_pointers[y][x_offset + 0],
00089 row_pointers[y][x_offset + 1], row_pointers[y][x_offset + 2]);
00090 } else {
00091 *pixel = row_pointers[y][x_offset];
00092 }
00093 }
00094 }
00095 }
00096
00102 static bool ReadHeightmapPNG(char *filename, uint *x, uint *y, byte **map)
00103 {
00104 FILE *fp;
00105 png_structp png_ptr = NULL;
00106 png_infop info_ptr = NULL;
00107
00108 fp = FioFOpenFile(filename, "rb");
00109 if (fp == NULL) {
00110 ShowErrorMessage(STR_ERROR_PNGMAP, STR_ERROR_PNGMAP_FILE_NOT_FOUND, WL_ERROR);
00111 return false;
00112 }
00113
00114 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
00115 if (png_ptr == NULL) {
00116 ShowErrorMessage(STR_ERROR_PNGMAP, STR_ERROR_PNGMAP_MISC, WL_ERROR);
00117 fclose(fp);
00118 return false;
00119 }
00120
00121 info_ptr = png_create_info_struct(png_ptr);
00122 if (info_ptr == NULL || setjmp(png_jmpbuf(png_ptr))) {
00123 ShowErrorMessage(STR_ERROR_PNGMAP, STR_ERROR_PNGMAP_MISC, WL_ERROR);
00124 fclose(fp);
00125 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
00126 return false;
00127 }
00128
00129 png_init_io(png_ptr, fp);
00130
00131
00132
00133 png_set_packing(png_ptr);
00134 png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_PACKING | PNG_TRANSFORM_STRIP_ALPHA | PNG_TRANSFORM_STRIP_16, NULL);
00135
00136
00137
00138 if ((png_get_channels(png_ptr, info_ptr) != 1) && (png_get_channels(png_ptr, info_ptr) != 3) && (png_get_bit_depth(png_ptr, info_ptr) != 8)) {
00139 ShowErrorMessage(STR_ERROR_PNGMAP, STR_ERROR_PNGMAP_IMAGE_TYPE, WL_ERROR);
00140 fclose(fp);
00141 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
00142 return false;
00143 }
00144
00145 if (map != NULL) {
00146 *map = MallocT<byte>(png_get_image_width(png_ptr, info_ptr) * png_get_image_height(png_ptr, info_ptr));
00147 ReadHeightmapPNGImageData(*map, png_ptr, info_ptr);
00148 }
00149
00150 *x = png_get_image_width(png_ptr, info_ptr);
00151 *y = png_get_image_height(png_ptr, info_ptr);
00152
00153 fclose(fp);
00154 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
00155 return true;
00156 }
00157
00158 #endif
00159
00160
00164 static void ReadHeightmapBMPImageData(byte *map, BmpInfo *info, BmpData *data)
00165 {
00166 uint x, y;
00167 byte gray_palette[256];
00168
00169 if (data->palette != NULL) {
00170 uint i;
00171 bool all_gray = true;
00172
00173 if (info->palette_size != 2) {
00174 for (i = 0; i < info->palette_size && (info->palette_size != 16 || all_gray); i++) {
00175 all_gray &= data->palette[i].r == data->palette[i].g && data->palette[i].r == data->palette[i].b;
00176 gray_palette[i] = RGBToGrayscale(data->palette[i].r, data->palette[i].g, data->palette[i].b);
00177 }
00178
00185 if (info->palette_size == 16 && !all_gray) {
00186 for (i = 0; i < info->palette_size; i++) {
00187 gray_palette[i] = 256 * i / info->palette_size;
00188 }
00189 }
00190 } else {
00195 gray_palette[0] = 0;
00196 gray_palette[1] = 16;
00197 }
00198 }
00199
00200
00201 for (y = 0; y < info->height; y++) {
00202 byte *pixel = &map[y * info->width];
00203 byte *bitmap = &data->bitmap[y * info->width * (info->bpp == 24 ? 3 : 1)];
00204
00205 for (x = 0; x < info->width; x++) {
00206 if (info->bpp != 24) {
00207 *pixel++ = gray_palette[*bitmap++];
00208 } else {
00209 *pixel++ = RGBToGrayscale(*bitmap, *(bitmap + 1), *(bitmap + 2));
00210 bitmap += 3;
00211 }
00212 }
00213 }
00214 }
00215
00221 static bool ReadHeightmapBMP(char *filename, uint *x, uint *y, byte **map)
00222 {
00223 FILE *f;
00224 BmpInfo info;
00225 BmpData data;
00226 BmpBuffer buffer;
00227
00228
00229 memset(&data, 0, sizeof(data));
00230
00231 f = FioFOpenFile(filename, "rb");
00232 if (f == NULL) {
00233 ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_PNGMAP_FILE_NOT_FOUND, WL_ERROR);
00234 return false;
00235 }
00236
00237 BmpInitializeBuffer(&buffer, f);
00238
00239 if (!BmpReadHeader(&buffer, &info, &data)) {
00240 ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_BMPMAP_IMAGE_TYPE, WL_ERROR);
00241 fclose(f);
00242 BmpDestroyData(&data);
00243 return false;
00244 }
00245
00246 if (map != NULL) {
00247 if (!BmpReadBitmap(&buffer, &info, &data)) {
00248 ShowErrorMessage(STR_ERROR_BMPMAP, STR_ERROR_BMPMAP_IMAGE_TYPE, WL_ERROR);
00249 fclose(f);
00250 BmpDestroyData(&data);
00251 return false;
00252 }
00253
00254 *map = MallocT<byte>(info.width * info.height);
00255 ReadHeightmapBMPImageData(*map, &info, &data);
00256 }
00257
00258 BmpDestroyData(&data);
00259
00260 *x = info.width;
00261 *y = info.height;
00262
00263 fclose(f);
00264 return true;
00265 }
00266
00274 static void GrayscaleToMapHeights(uint img_width, uint img_height, byte *map)
00275 {
00276
00277 const uint num_div = 16384;
00278
00279 uint width, height;
00280 uint row, col;
00281 uint row_pad = 0, col_pad = 0;
00282 uint img_scale;
00283 uint img_row, img_col;
00284 TileIndex tile;
00285
00286
00287 switch (_settings_game.game_creation.heightmap_rotation) {
00288 default: NOT_REACHED();
00289 case HM_COUNTER_CLOCKWISE:
00290 width = MapSizeX();
00291 height = MapSizeY();
00292 break;
00293 case HM_CLOCKWISE:
00294 width = MapSizeY();
00295 height = MapSizeX();
00296 break;
00297 }
00298
00299 if ((img_width * num_div) / img_height > ((width * num_div) / height)) {
00300
00301 img_scale = (width * num_div) / img_width;
00302 row_pad = (1 + height - ((img_height * img_scale) / num_div)) / 2;
00303 } else {
00304
00305 img_scale = (height * num_div) / img_height;
00306 col_pad = (1 + width - ((img_width * img_scale) / num_div)) / 2;
00307 }
00308
00309 if (_settings_game.construction.freeform_edges) {
00310 for (uint x = 0; x < MapSizeX(); x++) MakeVoid(TileXY(x, 0));
00311 for (uint y = 0; y < MapSizeY(); y++) MakeVoid(TileXY(0, y));
00312 }
00313
00314
00315 for (row = 0; row < height; row++) {
00316 for (col = 0; col < width; col++) {
00317 switch (_settings_game.game_creation.heightmap_rotation) {
00318 default: NOT_REACHED();
00319 case HM_COUNTER_CLOCKWISE: tile = TileXY(col, row); break;
00320 case HM_CLOCKWISE: tile = TileXY(row, col); break;
00321 }
00322
00323
00324 if ((!_settings_game.construction.freeform_edges && DistanceFromEdge(tile) <= 1) ||
00325 (row < row_pad) || (row >= (height - row_pad - (_settings_game.construction.freeform_edges ? 0 : 1))) ||
00326 (col < col_pad) || (col >= (width - col_pad - (_settings_game.construction.freeform_edges ? 0 : 1)))) {
00327 SetTileHeight(tile, 0);
00328 } else {
00329
00330
00331 img_row = (((row - row_pad) * num_div) / img_scale);
00332 switch (_settings_game.game_creation.heightmap_rotation) {
00333 default: NOT_REACHED();
00334 case HM_COUNTER_CLOCKWISE:
00335 img_col = (((width - 1 - col - col_pad) * num_div) / img_scale);
00336 break;
00337 case HM_CLOCKWISE:
00338 img_col = (((col - col_pad) * num_div) / img_scale);
00339 break;
00340 }
00341
00342 assert(img_row < img_height);
00343 assert(img_col < img_width);
00344
00345
00346 SetTileHeight(tile, map[img_row * img_width + img_col] / 16);
00347 }
00348
00349 if (TileX(tile) != MapMaxX() && TileY(tile) != MapMaxY() &&
00350 (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0))) {
00351 MakeClear(tile, CLEAR_GRASS, 3);
00352 }
00353 }
00354 }
00355 }
00356
00361 void FixSlopes()
00362 {
00363 uint width, height;
00364 int row, col;
00365 byte current_tile;
00366
00367
00368 width = MapSizeX();
00369 height = MapSizeY();
00370
00371
00372 for (row = 0; (uint)row < height; row++) {
00373 for (col = 0; (uint)col < width; col++) {
00374 current_tile = MAX_TILE_HEIGHT;
00375 if (col != 0) {
00376
00377 current_tile = TileHeight(TileXY(col - 1, row));
00378 }
00379 if (row != 0) {
00380 if (TileHeight(TileXY(col, row - 1)) < current_tile) {
00381 current_tile = TileHeight(TileXY(col, row - 1));
00382 }
00383 }
00384
00385
00386 if (TileHeight(TileXY(col, row)) >= (uint)current_tile + 2) {
00387
00388 SetTileHeight(TileXY(col, row), current_tile + 1);
00389 }
00390 }
00391 }
00392
00393
00394 for (row = height - 1; row >= 0; row--) {
00395 for (col = width - 1; col >= 0; col--) {
00396 current_tile = MAX_TILE_HEIGHT;
00397 if ((uint)col != width - 1) {
00398
00399 current_tile = TileHeight(TileXY(col + 1, row));
00400 }
00401
00402 if ((uint)row != height - 1) {
00403 if (TileHeight(TileXY(col, row + 1)) < current_tile) {
00404 current_tile = TileHeight(TileXY(col, row + 1));
00405 }
00406 }
00407
00408
00409 if (TileHeight(TileXY(col, row)) >= (uint)current_tile + 2) {
00410
00411 SetTileHeight(TileXY(col, row), current_tile + 1);
00412 }
00413 }
00414 }
00415 }
00416
00420 static bool ReadHeightMap(char *filename, uint *x, uint *y, byte **map)
00421 {
00422 switch (_file_to_saveload.mode) {
00423 default: NOT_REACHED();
00424 #ifdef WITH_PNG
00425 case SL_PNG:
00426 return ReadHeightmapPNG(filename, x, y, map);
00427 #endif
00428 case SL_BMP:
00429 return ReadHeightmapBMP(filename, x, y, map);
00430 }
00431 }
00432
00440 bool GetHeightmapDimensions(char *filename, uint *x, uint *y)
00441 {
00442 return ReadHeightMap(filename, x, y, NULL);
00443 }
00444
00451 void LoadHeightmap(char *filename)
00452 {
00453 uint x, y;
00454 byte *map = NULL;
00455
00456 if (!ReadHeightMap(filename, &x, &y, &map)) {
00457 free(map);
00458 return;
00459 }
00460
00461 GrayscaleToMapHeights(x, y, map);
00462 free(map);
00463
00464 FixSlopes();
00465 MarkWholeScreenDirty();
00466 }
00467
00472 void FlatEmptyWorld(byte tile_height)
00473 {
00474 int edge_distance = _settings_game.construction.freeform_edges ? 0 : 2;
00475 for (uint row = edge_distance; row < MapSizeY() - edge_distance; row++) {
00476 for (uint col = edge_distance; col < MapSizeX() - edge_distance; col++) {
00477 SetTileHeight(TileXY(col, row), tile_height);
00478 }
00479 }
00480
00481 FixSlopes();
00482 MarkWholeScreenDirty();
00483 }