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- //
- // Lol Engine
- //
- // Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net>
- // This program is free software; you can redistribute it and/or
- // modify it under the terms of the Do What The Fuck You Want To
- // Public License, Version 2, as published by Sam Hocevar. See
- // http://sam.zoy.org/projects/COPYING.WTFPL for more details.
- //
-
- #if defined HAVE_CONFIG_H
- # include "config.h"
- #endif
-
- #include <cstdlib>
- #include <cmath>
-
- #ifdef WIN32
- # define WIN32_LEAN_AND_MEAN
- # include <windows.h>
- #endif
- #if defined __APPLE__ && defined __MACH__
- # include <OpenGL/gl.h>
- #else
- # define GL_GLEXT_PROTOTYPES
- # include <GL/gl.h>
- #endif
-
- #include <SDL.h>
- #include <SDL_image.h>
-
- #include "core.h"
-
- /*
- * TileSet implementation class
- */
-
- class TileSetData
- {
- friend class TileSet;
-
- private:
- char *name, *path;
- int *tiles, ntiles;
- int2 size, count;
- float dilate, tx, ty;
-
- SDL_Surface *img;
- GLuint texture;
- };
-
- /*
- * Public TileSet class
- */
-
- TileSet::TileSet(char const *path, int2 size, int2 count, float dilate)
- : data(new TileSetData())
- {
- data->name = (char *)malloc(10 + strlen(path) + 1);
- data->path = data->name + 10;
- sprintf(data->name, "<tileset> %s", path);
-
- data->tiles = NULL;
- data->img = NULL;
- data->texture = 0;
-
- for (char const *name = path; *name; name++)
- if ((data->img = IMG_Load(name)))
- break;
-
- if (!data->img)
- {
- #if !FINAL_RELEASE
- fprintf(stderr, "ERROR: could not load %s\n", path);
- #endif
- SDL_Quit();
- exit(1);
- }
-
- if (count.i > 0 && count.j > 0)
- {
- data->count = count;
- data->size = int2(data->img->w, data->img->h) / count;
- }
- else
- {
- if (size.x <= 0 || size.y <= 0)
- size = 32;
- data->count.i = data->img->w > size.i ? data->img->w / size.i : 1;
- data->count.j = data->img->h > size.j ? data->img->h / size.j : 1;
- data->size = size;
- }
-
- data->dilate = dilate;
- data->ntiles = data->count.i * data->count.j;
- data->tx = (float)data->size.x / PotUp(data->img->w);
- data->ty = (float)data->size.y / PotUp(data->img->h);
-
- drawgroup = DRAWGROUP_BEFORE;
- }
-
- TileSet::~TileSet()
- {
- free(data->tiles);
- free(data->name);
- delete data;
- }
-
- void TileSet::TickDraw(float deltams)
- {
- Entity::TickDraw(deltams);
-
- if (IsDestroying())
- {
- if (data->img)
- SDL_FreeSurface(data->img);
- else
- glDeleteTextures(1, &data->texture);
- }
- else if (data->img)
- {
- GLuint format = data->img->format->Amask ? GL_RGBA : GL_RGB;
- int planes = data->img->format->Amask ? 4 : 3;
-
- int w = PotUp(data->img->w);
- int h = PotUp(data->img->h);
-
- uint8_t *pixels = (uint8_t *)data->img->pixels;
- if (w != data->img->w || h != data->img->h)
- {
- uint8_t *tmp = (uint8_t *)malloc(planes * w * h);
- for (int line = 0; line < data->img->h; line++)
- memcpy(tmp + planes * w * line,
- pixels + planes * data->img->w * line,
- planes * data->img->w);
- pixels = tmp;
- }
-
- glGenTextures(1, &data->texture);
- glBindTexture(GL_TEXTURE_2D, data->texture);
-
- glTexImage2D(GL_TEXTURE_2D, 0, planes, w, h, 0,
- format, GL_UNSIGNED_BYTE, pixels);
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-
- if (pixels != data->img->pixels)
- free(pixels);
- SDL_FreeSurface(data->img);
- data->img = NULL;
- }
- }
-
- char const *TileSet::GetName()
- {
- return data->name;
- }
-
- int2 TileSet::GetSize() const
- {
- return data->size;
- }
-
- int2 TileSet::GetCount() const
- {
- return data->count;
- }
-
- void TileSet::Bind()
- {
- if (!data->img)
- glBindTexture(GL_TEXTURE_2D, data->texture);
- }
-
- void TileSet::BlitTile(uint32_t id, int x, int y, int z, int o,
- float *vertex, float *texture)
- {
- float tx = data->tx * ((id & 0xffff) % data->count.i);
- float ty = data->ty * ((id & 0xffff) / data->count.i);
- float dilate = data->dilate;
-
- int dx = data->size.x;
- int dy = o ? 0 : data->size.y;
- int dz = o ? data->size.y : 0;
-
- if (!data->img)
- {
- float tmp[10];
-
- *vertex++ = tmp[0] = x;
- *vertex++ = tmp[1] = dilate * (y + dy);
- *vertex++ = tmp[2] = dilate * (z + dz);
- *texture++ = tmp[3] = tx;
- *texture++ = tmp[4] = ty;
-
- *vertex++ = x + dx;
- *vertex++ = dilate * (y + dy);
- *vertex++ = dilate * (z + dz);
- *texture++ = tx + data->tx;
- *texture++ = ty;
-
- *vertex++ = tmp[5] = x + dx;
- *vertex++ = tmp[6] = dilate * y;
- *vertex++ = tmp[7] = dilate * z;
- *texture++ = tmp[8] = tx + data->tx;
- *texture++ = tmp[9] = ty + data->ty;
-
- *vertex++ = tmp[0];
- *vertex++ = tmp[1];
- *vertex++ = tmp[2];
- *texture++ = tmp[3];
- *texture++ = tmp[4];
-
- *vertex++ = tmp[5];
- *vertex++ = tmp[6];
- *vertex++ = tmp[7];
- *texture++ = tmp[8];
- *texture++ = tmp[9];
-
- *vertex++ = x;
- *vertex++ = dilate * y;
- *vertex++ = dilate * z;
- *texture++ = tx;
- *texture++ = ty + data->ty;
- }
- else
- {
- memset(vertex, 0, 3 * sizeof(float));
- memset(texture, 0, 2 * sizeof(float));
- }
- }
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