1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
#include "AppHdr.h"
#ifdef USE_TILE
#include "files.h"
#include "tiletex.h"
#include <SDL.h>
#include <SDL_opengl.h>
#include <SDL_image.h>
GenericTexture::GenericTexture() :
m_handle(0),
m_width(0),
m_height(0),
m_orig_width(0),
m_orig_height(0)
{
}
GenericTexture::~GenericTexture()
{
unload_texture();
}
void GenericTexture::unload_texture()
{
if (!m_handle)
return;
glDeleteTextures(1, (GLuint*)&m_handle);
}
bool GenericTexture::load_texture(const char *filename,
GenericTexture::MipMapOptions mip_opt,
tex_proc_func proc,
bool force_power_of_two)
{
char acBuffer[512];
std::string tex_path = datafile_path(filename);
if (tex_path.c_str()[0] == 0)
{
fprintf(stderr, "Couldn't find texture '%s'.\n", filename);
return (false);
}
SDL_Surface *img = IMG_Load(tex_path.c_str());
if (!img)
{
fprintf(stderr, "Couldn't load texture '%s'.\n", tex_path.c_str());
return (false);
}
unsigned int bpp = img->format->BytesPerPixel;
glPixelStorei(GL_UNPACK_ALIGNMENT, bpp);
// Determine texture format
unsigned char *pixels = (unsigned char*)img->pixels;
int new_width;
int new_height;
if (force_power_of_two)
{
new_width = 1;
while (new_width < img->w)
new_width *= 2;
new_height = 1;
while (new_height < img->h)
new_height *= 2;
}
else
{
new_width = img->w;
new_height = img->h;
}
GLenum texture_format;
if (bpp == 4)
{
// Even if the size is the same, still go through
// SDL_GetRGBA to put the image in the right format.
SDL_LockSurface(img);
pixels = new unsigned char[4 * new_width * new_height];
memset(pixels, 0, 4 * new_width * new_height);
int dest = 0;
for (int y = 0; y < img->h; y++)
{
for (int x = 0; x < img->w; x++)
{
unsigned char *p = ((unsigned char*)img->pixels
+ y * img->pitch + x * bpp);
unsigned int pixel = *(unsigned int*)p;
SDL_GetRGBA(pixel, img->format, &pixels[dest],
&pixels[dest+1], &pixels[dest+2],
&pixels[dest+3]);
dest += 4;
}
dest += 4 * (new_width - img->w);
}
SDL_UnlockSurface(img);
texture_format = GL_RGBA;
}
else if (bpp == 3)
{
if (new_width != img->w || new_height != img->h)
{
SDL_LockSurface(img);
pixels = new unsigned char[4 * new_width * new_height];
memset(pixels, 0, 4 * new_width * new_height);
int dest = 0;
for (int y = 0; y < img->h; y++)
{
for (int x = 0; x < img->w; x++)
{
unsigned char *p = ((unsigned char*)img->pixels
+ y * img->pitch + x * bpp);
unsigned int pixel;
if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
pixel = p[0] << 16 | p[1] << 8 | p[2];
else
pixel = p[0] | p[1] << 8 | p[2];
SDL_GetRGBA(pixel, img->format, &pixels[dest],
&pixels[dest+1], &pixels[dest+2],
&pixels[dest+3]);
dest += 4;
}
dest += 4 * (new_width - img->w);
}
SDL_UnlockSurface(img);
}
texture_format = GL_RGBA;
}
else if (bpp == 1)
{
// need to depalettize
SDL_LockSurface(img);
pixels = new unsigned char[4 * new_width * new_height];
SDL_Palette* pal = img->format->palette;
ASSERT(pal);
ASSERT(pal->colors);
int src = 0;
int dest = 0;
for (int y = 0; y < img->h; y++)
{
int x;
for (x = 0; x < img->w; x++)
{
unsigned int index = ((unsigned char*)img->pixels)[src++];
pixels[dest*4 ] = pal->colors[index].r;
pixels[dest*4 + 1] = pal->colors[index].g;
pixels[dest*4 + 2] = pal->colors[index].b;
pixels[dest*4 + 3] = (index != img->format->colorkey ? 255 : 0);
dest++;
}
while (x++ < new_width)
{
// Extend to the right with transparent pixels
pixels[dest*4 ] = 0;
pixels[dest*4 + 1] = 0;
pixels[dest*4 + 2] = 0;
pixels[dest*4 + 3] = 0;
dest++;
}
}
while (dest < new_width * new_height)
{
// Extend down with transparent pixels
pixels[dest*4 ] = 0;
pixels[dest*4 + 1] = 0;
pixels[dest*4 + 2] = 0;
pixels[dest*4 + 3] = 0;
dest++;
}
SDL_UnlockSurface(img);
bpp = 4;
texture_format = GL_RGBA;
}
else
{
printf("Warning: unsupported format, bpp = %d for '%s'\n",
bpp, acBuffer);
return (false);
}
bool success = false;
if (!proc || proc(pixels, new_width, new_height))
success |= load_texture(pixels, new_width, new_height, mip_opt);
// If conversion has occurred, delete converted data.
if (pixels != img->pixels)
delete[] pixels;
m_orig_width = img->w;
m_orig_height = img->h;
SDL_FreeSurface(img);
return (success);
}
bool GenericTexture::load_texture(unsigned char *pixels, unsigned int new_width,
unsigned int new_height,
GenericTexture::MipMapOptions mip_opt)
{
if (!pixels || !new_width || !new_height)
return (false);
// Assumptions...
const unsigned int bpp = 4;
const GLenum texture_format = GL_RGBA;
const GLenum format = GL_UNSIGNED_BYTE;
m_width = new_width;
m_height = new_height;
glGenTextures(1, (GLuint*)&m_handle);
glBindTexture(GL_TEXTURE_2D, m_handle);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
if (mip_opt == MIPMAP_CREATE)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gluBuild2DMipmaps(GL_TEXTURE_2D, bpp, m_width, m_height,
texture_format, format, pixels);
}
else
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, bpp, m_width, m_height, 0,
texture_format, format, pixels);
}
return (true);
}
void GenericTexture::bind() const
{
ASSERT(m_handle);
glBindTexture(GL_TEXTURE_2D, m_handle);
}
TilesTexture::TilesTexture() :
GenericTexture(), m_tile_max(0), m_info_func(NULL)
{
}
void TilesTexture::set_info(int tile_max, tile_info_func *info_func)
{
m_tile_max = tile_max;
m_info_func = info_func;
}
#endif
|
