forked from mirror/OpenTTD
(svn r5946) -Add: merged the TGP branch to mainline. TGP adds:
- New optional landscape generator (TerraGenesis Perlin)
- Load heightmaps (either BMP or PNG)
- Progress dialog while generating worlds (no longer a 'hanging' screen)
- New dialogs for NewGame, Create Scenario and Play Heightmap
- Easier to configure your landscape
- More things to configure (tree-placer, ..)
- Speedup of world generation
- New console command 'restart': restart the map EXACTLY as it was when you
first started it (needs a game made after or with this commit)
- New console command 'getseed': get the seed of your map and share it with
others (of course only works with generated maps)
- Many new, world generation related, things
- Many internal cleanups and rewrites
Many tnx to those people who helped making this:
Belugas, DaleStan, glx, KUDr, RichK67, Rubidium, and TrueLight (alfabetic)
Many tnx to those who helped testing:
Arnau, Bjarni, and tokai (alfabetic)
And to all other people who helped testing and sending comments / bugs
Stats: 673 lines changed, 3534 new lines, 79 new strings
This commit is contained in:
truelight
459
heightmap.c
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459
heightmap.c
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@@ -0,0 +1,459 @@
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/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "variables.h"
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#include "functions.h"
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#include "heightmap.h"
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#include "clear_map.h"
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#include "table/strings.h"
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#include "void_map.h"
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#include "debug.h"
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#include "gfx.h"
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#include "gui.h"
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#include "saveload.h"
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#include "bmp.h"
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/**
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* Convert RGB colors to Grayscale using 29.9% Red, 58.7% Green, 11.4% Blue
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* (average luminosity formula) -- Dalestan
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* This in fact is the NTSC Color Space -- TrueLight
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*/
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static inline byte RGBToGrayscale(byte red, byte green, byte blue)
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{
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/* To avoid doubles and stuff, multiple it with a total of 65536 (16bits), then
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* divide by it to normalize the value to a byte again. */
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return ((red * 19595) + (green * 38470) + (blue * 7471)) / 65536;
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}
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#ifdef WITH_PNG
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#include "png.h"
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/**
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* The PNG Heightmap loader.
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*/
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static void ReadHeightmapPNGImageData(byte *map, png_structp png_ptr, png_infop info_ptr)
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{
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uint x, y;
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byte gray_palette[256];
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png_bytep *row_pointers = NULL;
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/* Get palette and convert it to grayscale */
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if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) {
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int i;
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int palette_size;
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png_color *palette;
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bool all_gray = true;
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png_get_PLTE(png_ptr, info_ptr, &palette, &palette_size);
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for (i = 0; i < palette_size && (palette_size != 16 || all_gray); i++) {
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all_gray &= palette[i].red == palette[i].green && palette[i].red == palette[i].blue;
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gray_palette[i] = RGBToGrayscale(palette[i].red, palette[i].green, palette[i].blue);
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}
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/**
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* For a non-gray palette of size 16 we assume that
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* the order of the palette determines the height;
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* the first entry is the sea (level 0), the second one
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* level 1, etc.
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*/
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if (palette_size == 16 && !all_gray) {
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for (i = 0; i < palette_size; i++) {
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gray_palette[i] = 256 * i / palette_size;
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}
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}
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}
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row_pointers = png_get_rows(png_ptr, info_ptr);
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/* Read the raw image data and convert in 8-bit grayscale */
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for (x = 0; x < info_ptr->width; x++) {
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for (y = 0; y < info_ptr->height; y++) {
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byte *pixel = &map[y * info_ptr->width + x];
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uint x_offset = x * info_ptr->channels;
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if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) {
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*pixel = gray_palette[row_pointers[y][x_offset]];
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} else if (info_ptr->channels == 3) {
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*pixel = RGBToGrayscale(row_pointers[y][x_offset + 0],
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row_pointers[y][x_offset + 1], row_pointers[y][x_offset + 2]);
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} else {
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*pixel = row_pointers[y][x_offset];
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}
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}
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}
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}
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/**
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* Reads the heightmap and/or size of the heightmap from a PNG file.
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* If map == NULL only the size of the PNG is read, otherwise a map
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* with grayscale pixels is allocated and assigned to *map.
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*/
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static bool ReadHeightmapPNG(char *filename, uint *x, uint *y, byte **map)
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{
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FILE *fp;
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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fp = fopen(filename, "rb");
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if (fp == NULL) {
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ShowErrorMessage(STR_PNGMAP_ERR_FILE_NOT_FOUND, STR_PNGMAP_ERROR, 0, 0);
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return false;
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}
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (png_ptr == NULL) {
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ShowErrorMessage(STR_PNGMAP_ERR_MISC, STR_PNGMAP_ERROR, 0, 0);
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fclose(fp);
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return false;
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (info_ptr == NULL || setjmp(png_jmpbuf(png_ptr))) {
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ShowErrorMessage(STR_PNGMAP_ERR_MISC, STR_PNGMAP_ERROR, 0, 0);
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fclose(fp);
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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return false;
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}
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png_init_io(png_ptr, fp);
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/* Allocate memory and read image, without alpha or 16-bit samples
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* (result is either 8-bit indexed/grayscale or 24-bit RGB) */
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png_set_packing(png_ptr);
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png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_PACKING | PNG_TRANSFORM_STRIP_ALPHA | PNG_TRANSFORM_STRIP_16, NULL);
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/* Maps of wrong color-depth are not used.
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* (this should have been taken care of by stripping alpha and 16-bit samples on load) */
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if ((info_ptr->channels != 1) && (info_ptr->channels != 3) && (info_ptr->bit_depth != 8)) {
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ShowErrorMessage(STR_PNGMAP_ERR_IMAGE_TYPE, STR_PNGMAP_ERROR, 0, 0);
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fclose(fp);
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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return false;
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}
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if (map != NULL) {
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*map = malloc(info_ptr->width * info_ptr->height * sizeof(byte));
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if (*map == NULL) {
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ShowErrorMessage(STR_PNGMAP_ERR_MISC, STR_PNGMAP_ERROR, 0, 0);
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fclose(fp);
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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return false;
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}
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ReadHeightmapPNGImageData(*map, png_ptr, info_ptr);
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}
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*x = info_ptr->width;
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*y = info_ptr->height;
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fclose(fp);
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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return true;
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}
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#endif /* WITH_PNG */
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/**
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* The BMP Heightmap loader.
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*/
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static void ReadHeightmapBMPImageData(byte *map, BmpInfo *info, BmpData *data)
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{
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uint x, y;
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byte gray_palette[256];
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if (data->palette != NULL) {
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uint i;
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bool all_gray = true;
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if (info->palette_size != 2) {
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for (i = 0; i < info->palette_size && (info->palette_size != 16 || all_gray); i++) {
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all_gray &= data->palette[i].r == data->palette[i].g && data->palette[i].r == data->palette[i].b;
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gray_palette[i] = RGBToGrayscale(data->palette[i].r, data->palette[i].g, data->palette[i].b);
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}
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/**
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* For a non-gray palette of size 16 we assume that
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* the order of the palette determines the height;
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* the first entry is the sea (level 0), the second one
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* level 1, etc.
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*/
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if (info->palette_size == 16 && !all_gray) {
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for (i = 0; i < info->palette_size; i++) {
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gray_palette[i] = 256 * i / info->palette_size;
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}
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}
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} else {
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/**
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* For a palette of size 2 we assume that the order of the palette determines the height;
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* the first entry is the sea (level 0), the second one is the land (level 1)
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*/
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gray_palette[0] = 0;
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gray_palette[1] = 16;
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}
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}
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/* Read the raw image data and convert in 8-bit grayscale */
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for (y = 0; y < info->height; y++) {
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byte *pixel = &map[y * info->width];
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byte *bitmap = &data->bitmap[y * info->width * (info->bpp == 24 ? 3 : 1)];
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for (x = 0; x < info->width; x++) {
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if (info->bpp != 24) {
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*pixel++ = gray_palette[*bitmap++];
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} else {
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*pixel++ = RGBToGrayscale(*bitmap, *(bitmap + 1), *(bitmap + 2));
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bitmap += 3;
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}
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}
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}
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}
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/**
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* Reads the heightmap and/or size of the heightmap from a BMP file.
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* If map == NULL only the size of the BMP is read, otherwise a map
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* with grayscale pixels is allocated and assigned to *map.
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*/
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static bool ReadHeightmapBMP(char *filename, uint *x, uint *y, byte **map)
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{
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FILE *f;
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BmpInfo info;
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BmpData data;
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BmpBuffer buffer;
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f = fopen(filename, "rb");
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if (f == NULL) {
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ShowErrorMessage(STR_PNGMAP_ERR_FILE_NOT_FOUND, STR_BMPMAP_ERROR, 0, 0);
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return false;
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}
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BmpInitializeBuffer(&buffer, f);
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if (!BmpReadHeader(&buffer, &info, &data)) {
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ShowErrorMessage(STR_BMPMAP_ERR_IMAGE_TYPE, STR_BMPMAP_ERROR, 0, 0);
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fclose(f);
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BmpDestroyData(&data);
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return false;
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}
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if (map != NULL) {
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if (!BmpReadBitmap(&buffer, &info, &data)) {
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ShowErrorMessage(STR_BMPMAP_ERR_IMAGE_TYPE, STR_BMPMAP_ERROR, 0, 0);
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fclose(f);
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BmpDestroyData(&data);
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return false;
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}
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*map = malloc(info.width * info.height * sizeof(byte));
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if (*map == NULL) {
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ShowErrorMessage(STR_PNGMAP_ERR_MISC, STR_BMPMAP_ERROR, 0, 0);
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fclose(f);
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BmpDestroyData(&data);
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return false;
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}
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ReadHeightmapBMPImageData(*map, &info, &data);
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}
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BmpDestroyData(&data);
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*x = info.width;
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*y = info.height;
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fclose(f);
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return true;
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}
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static void GrayscaleToMapHeights(uint img_width, uint img_height, byte *map)
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{
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/* Defines the detail of the aspect ratio (to avoid doubles) */
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const uint num_div = 16384;
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uint width, height;
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uint row, col;
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uint row_pad = 0, col_pad = 0;
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uint img_scale;
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uint img_row, img_col;
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TileIndex tile;
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/* Get map size and calculate scale and padding values */
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switch (_patches.heightmap_rotation) {
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case HM_COUNTER_CLOCKWISE:
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width = MapSizeX();
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height = MapSizeY();
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break;
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case HM_CLOCKWISE:
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width = MapSizeY();
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height = MapSizeX();
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break;
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default:
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NOT_REACHED();
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/* Avoids compiler warnings */
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return;
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}
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if ((img_width * num_div) / img_height > ((width * num_div) / height)) {
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/* Image is wider than map - center vertically */
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img_scale = (width * num_div) / img_width;
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row_pad = (height - ((img_height * img_scale) / num_div)) / 2;
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} else {
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/* Image is taller than map - center horizontally */
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img_scale = (height * num_div) / img_height;
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col_pad = (width - ((img_width * img_scale) / num_div)) / 2;
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}
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/* Form the landscape */
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for (row = 0; row < height - 1; row++) {
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for (col = 0; col < width - 1; col++) {
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switch (_patches.heightmap_rotation) {
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case HM_COUNTER_CLOCKWISE: tile = TileXY(col, row); break;
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case HM_CLOCKWISE: tile = TileXY(row, col); break;
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default: NOT_REACHED(); return;
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}
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/* Check if current tile is within the 1-pixel map edge or padding regions */
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if ((DistanceFromEdge(tile) <= 1) ||
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(row < row_pad) || (row >= (height - row_pad)) ||
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(col < col_pad) || (col >= (width - col_pad))) {
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SetTileHeight(tile, 0);
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} else {
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/* Use nearest neighbor resizing to scale map data.
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* We rotate the map 45 degrees (counter)clockwise */
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img_row = (((row - row_pad) * num_div) / img_scale);
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switch (_patches.heightmap_rotation) {
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case HM_COUNTER_CLOCKWISE:
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img_col = (((width - 1 - col - col_pad) * num_div) / img_scale);
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break;
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case HM_CLOCKWISE:
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img_col = (((col - col_pad) * num_div) / img_scale);
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break;
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default:
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NOT_REACHED();
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/* Avoids compiler warnings */
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return;
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}
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assert(img_row < img_height);
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assert(img_col < img_width);
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/* Color scales from 0 to 255, OpenTTD height scales from 0 to 15 */
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SetTileHeight(tile, map[img_row * img_width + img_col] / 16);
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}
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MakeClear(tile, CLEAR_GRASS, 3);
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}
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}
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}
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/**
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* This function takes care of the fact that land in OpenTTD can never differ
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* more than 1 in height
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*/
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static void FixSlopes(void)
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{
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uint width, height;
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uint row, col;
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byte current_tile;
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/* Adjust height difference to maximum one horizontal/vertical change. */
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width = MapSizeX();
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height = MapSizeY();
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/* Top and left edge */
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for (row = 1; row < height - 2; row++) {
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for (col = 1; col < width - 2; col++) {
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/* Find lowest tile; either the top or left one */
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current_tile = TileHeight(TileXY(col - 1, row)); // top edge
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if (TileHeight(TileXY(col, row - 1)) < current_tile) {
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current_tile = TileHeight(TileXY(col, row - 1)); // left edge
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}
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/* Does the height differ more than one? */
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if (TileHeight(TileXY(col, row)) >= (uint)current_tile + 2) {
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/* Then change the height to be no more than one */
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SetTileHeight(TileXY(col, row), current_tile + 1);
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}
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}
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}
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/* Bottom and right edge */
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for (row = height - 2; row > 0; row--) {
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for (col = width - 2; col > 0; col--) {
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/* Find lowest tile; either the bottom and right one */
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current_tile = TileHeight(TileXY(col + 1, row)); // bottom edge
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if (TileHeight(TileXY(col, row + 1)) < current_tile) {
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current_tile = TileHeight(TileXY(col, row + 1)); // right edge
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}
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/* Does the height differ more than one? */
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if (TileHeight(TileXY(col, row)) >= (uint)current_tile + 2) {
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/* Then change the height to be no more than one */
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SetTileHeight(TileXY(col, row), current_tile + 1);
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}
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}
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}
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||||
}
|
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|
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/**
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* Reads the heightmap with the correct file reader
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*/
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static bool ReadHeightMap(char *filename, uint *x, uint *y, byte **map)
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{
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switch (_file_to_saveload.mode) {
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#ifdef WITH_PNG
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case SL_PNG:
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return ReadHeightmapPNG(filename, x, y, map);
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#endif /* WITH_PNG */
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case SL_BMP:
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return ReadHeightmapBMP(filename, x, y, map);
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default:
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NOT_REACHED();
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/* Avoids compiler warnings */
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||||
return false;
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||||
}
|
||||
}
|
||||
|
||||
bool GetHeightmapDimensions(char *filename, uint *x, uint *y)
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||||
{
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||||
return ReadHeightMap(filename, x, y, NULL);
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}
|
||||
|
||||
void LoadHeightmap(char *filename)
|
||||
{
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||||
uint x, y;
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||||
byte *map = NULL;
|
||||
|
||||
if (!ReadHeightMap(filename, &x, &y, &map)) {
|
||||
free(map);
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||||
return;
|
||||
}
|
||||
|
||||
GrayscaleToMapHeights(x, y, map);
|
||||
free(map);
|
||||
|
||||
FixSlopes();
|
||||
MarkWholeScreenDirty();
|
||||
}
|
||||
|
||||
void FlatEmptyWorld(byte tile_height)
|
||||
{
|
||||
uint width, height;
|
||||
uint row, col;
|
||||
|
||||
width = MapSizeX();
|
||||
height = MapSizeY();
|
||||
|
||||
for (row = 2; row < height - 2; row++) {
|
||||
for (col = 2; col < width - 2; col++) {
|
||||
SetTileHeight(TileXY(col, row), tile_height);
|
||||
}
|
||||
}
|
||||
|
||||
FixSlopes();
|
||||
MarkWholeScreenDirty();
|
||||
}
|
||||
Reference in New Issue
Block a user