source: trunk/src/tileset.cpp @ 205

Last change on this file since 205 was 205, checked in by sam, 10 years ago

Fix broken perspective.

  • Property svn:keywords set to Id
File size: 2.9 KB
Line 
1//
2// Deus Hax (working title)
3// Copyright (c) 2010 Sam Hocevar <sam@hocevar.net>
4//
5
6#if defined HAVE_CONFIG_H
7#   include "config.h"
8#endif
9
10#include <cstdlib>
11#include <cmath>
12
13#ifdef WIN32
14#   define WIN32_LEAN_AND_MEAN
15#   include <windows.h>
16#endif
17#if defined __APPLE__ && defined __MACH__
18#   include <OpenGL/gl.h>
19#else
20#   define GL_GLEXT_PROTOTYPES
21#   include <GL/gl.h>
22#endif
23
24#include <SDL.h>
25#include <SDL_image.h>
26
27#include "core.h"
28
29/*
30 * TileSet implementation class
31 */
32
33class TileSetData
34{
35    friend class TileSet;
36
37private:
38    char *name;
39    int *tiles;
40    int nw, nh, ntiles;
41    float tx, ty;
42
43    SDL_Surface *img;
44    GLuint texture;
45};
46
47/*
48 * Public TileSet class
49 */
50
51TileSet::TileSet(char const *path)
52{
53    data = new TileSetData();
54    data->name = strdup(path);
55    data->tiles = NULL;
56    data->img = NULL;
57    data->texture = 0;
58
59    for (char const *name = path; *name; name++)
60        if ((data->img = IMG_Load(name)))
61            break;
62
63    if (!data->img)
64    {
65        SDL_Quit();
66        exit(1);
67    }
68
69    data->nw = data->img->w / 32;
70    data->nh = data->img->h / 32;
71    data->ntiles = data->nw * data->nh;
72    data->tx = 32.0f / data->img->w;
73    data->ty = 32.0f / data->img->h;
74}
75
76TileSet::~TileSet()
77{
78    free(data->tiles);
79    free(data->name);
80    delete data;
81}
82
83Entity::Group TileSet::GetGroup()
84{
85    return GROUP_BEFORE;
86}
87
88void TileSet::TickDraw(float deltams)
89{
90    Entity::TickDraw(deltams);
91
92    if (destroy)
93    {
94        if (data->img)
95            SDL_FreeSurface(data->img);
96        else
97            glDeleteTextures(1, &data->texture);
98    }
99    else if (data->img)
100    {
101        glGenTextures(1, &data->texture);
102        glBindTexture(GL_TEXTURE_2D, data->texture);
103
104        glTexImage2D(GL_TEXTURE_2D, 0, 4, data->img->w, data->img->h, 0,
105                     GL_RGBA, GL_UNSIGNED_BYTE, data->img->pixels);
106
107        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
108        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
109
110        SDL_FreeSurface(data->img);
111        data->img = NULL;
112    }
113}
114
115char const *TileSet::GetName()
116{
117    return data->name;
118}
119
120void TileSet::BlitTile(uint32_t id, int x, int y, int z, int o)
121{
122    float tx = data->tx * ((id & 0xffff) % data->nw);
123    float ty = data->ty * ((id & 0xffff) / data->nw);
124
125    float sqrt2 = sqrtf(2.0f);
126    int off = o ? 32 : 0;
127
128    if (!data->img)
129    {
130        glBindTexture(GL_TEXTURE_2D, data->texture);
131        glBegin(GL_QUADS);
132            glTexCoord2f(tx, ty);
133            glVertex3f(x, sqrt2 * (y - 38 - off), sqrt2 * (z + off));
134            glTexCoord2f(tx + data->tx, ty);
135            glVertex3f(x + 32, sqrt2 * (y - 38 - off), sqrt2 * (z + off));
136            glTexCoord2f(tx + data->tx, ty + data->ty);
137            glVertex3f(x + 32, sqrt2 * (y - 70), sqrt2 * z);
138            glTexCoord2f(tx, ty + data->ty);
139            glVertex3f(x, sqrt2 * (y - 70), sqrt2 * z);
140        glEnd();
141    }
142}
143
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