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
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
|
/*
* The Mana World
* Copyright 2004 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* The Mana World is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with The Mana World; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*/
#include "image.h"
#include <SDL_image.h>
#include "../log.h"
#ifdef USE_OPENGL
bool Image::mUseOpenGL = false;
#endif
Image::Image(const std::string &idPath, SDL_Surface *image):
Resource(idPath), mImage(image),
mAlpha(1.0f)
{
mBounds.x = 0;
mBounds.y = 0;
mBounds.w = mImage->w;
mBounds.h = mImage->h;
}
#ifdef USE_OPENGL
Image::Image(const std::string &idPath, GLuint glimage, int width, int height,
int texWidth, int texHeight):
Resource(idPath),
mGLImage(glimage),
mTexWidth(texWidth),
mTexHeight(texHeight),
mImage(0),
mAlpha(1.0)
{
mBounds.x = 0;
mBounds.y = 0;
mBounds.w = width;
mBounds.h = height;
}
#endif
Image::~Image()
{
unload();
}
Image* Image::load(void *buffer, unsigned int bufferSize,
const std::string &idPath)
{
// Load the raw file data from the buffer in an RWops structure
SDL_RWops *rw = SDL_RWFromMem(buffer, bufferSize);
// Use SDL_Image to load the raw image data and have it free the data
SDL_Surface *tmpImage = IMG_Load_RW(rw, 1);
if (tmpImage == NULL) {
logger->log("Error, image load failed: %s", IMG_GetError());
return NULL;
}
// Determine 32-bit masks based on byte order
Uint32 rmask, gmask, bmask, amask;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
rmask = 0xff000000;
gmask = 0x00ff0000;
bmask = 0x0000ff00;
amask = 0x000000ff;
#else
rmask = 0x000000ff;
gmask = 0x0000ff00;
bmask = 0x00ff0000;
amask = 0xff000000;
#endif
// Convert the image to a 32 bit software surface for processing
SDL_Surface *formatImage = SDL_CreateRGBSurface(SDL_SWSURFACE, 0, 0, 32,
rmask, gmask, bmask, amask);
if (formatImage == NULL) {
logger->log("Error, image load failed: not enough memory");
SDL_FreeSurface(tmpImage);
return NULL;
}
SDL_Surface *image = SDL_ConvertSurface(
tmpImage, formatImage->format, SDL_SWSURFACE);
SDL_FreeSurface(formatImage);
if (image == NULL) {
logger->log("Error, image load failed: not enough memory");
return NULL;
}
bool hasPink = false;
bool hasAlpha = false;
int i;
Uint32 pink = SDL_MapRGB(image->format, 255, 0, 255);
// Figure out whether the image has pink pixels
for (i = 0; i < image->w * image->h; ++i)
{
if (((Uint32*)image->pixels)[i] == pink)
{
hasPink = true;
break;
}
}
// Figure out whether the image uses its alpha layer
for (i = 0; i < image->w * image->h; ++i)
{
Uint8 r, g, b, a;
SDL_GetRGBA(
((Uint32*)image->pixels)[i],
image->format,
&r, &g, &b, &a);
if (a != 255)
{
hasAlpha = true;
break;
}
}
SDL_FreeSurface(image);
if (hasPink && !hasAlpha) {
SDL_SetColorKey(tmpImage, SDL_SRCCOLORKEY | SDL_RLEACCEL,
SDL_MapRGB(tmpImage->format, 255, 0, 255));
} else if (hasAlpha) {
SDL_SetAlpha(tmpImage, SDL_SRCALPHA | SDL_RLEACCEL, SDL_ALPHA_OPAQUE);
}
#ifdef USE_OPENGL
if (mUseOpenGL)
{
int width = tmpImage->w;
int height = tmpImage->h;
int realWidth = 1, realHeight = 1;
while (realWidth < width && realWidth < 1024) {
realWidth *= 2;
}
while (realHeight < height && realHeight < 1024) {
realHeight *= 2;
}
SDL_SetAlpha(tmpImage, 0, SDL_ALPHA_OPAQUE);
SDL_Surface *oldImage = tmpImage;
tmpImage = SDL_CreateRGBSurface(SDL_SWSURFACE, realWidth, realHeight, 32,
rmask, gmask, bmask, amask);
if (tmpImage == NULL) {
logger->log("Error, image convert failed: out of memory");
return NULL;
}
SDL_BlitSurface(oldImage, NULL, tmpImage, NULL);
SDL_FreeSurface(oldImage);
GLuint texture;
glGenTextures(1, &texture);
logger->log("Binding texture %d (%dx%d)",
texture, tmpImage->w, tmpImage->h);
glBindTexture(GL_TEXTURE_2D, texture);
if (SDL_MUSTLOCK(tmpImage)) {
SDL_LockSurface(tmpImage);
}
glTexImage2D(
GL_TEXTURE_2D, 0, 4,
tmpImage->w, tmpImage->h,
0, GL_RGBA, GL_UNSIGNED_BYTE,
tmpImage->pixels);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if (SDL_MUSTLOCK(tmpImage)) {
SDL_UnlockSurface(tmpImage);
}
SDL_FreeSurface(tmpImage);
GLenum error = glGetError();
if (error)
{
std::string errmsg = "Unkown error";
switch (error)
{
case GL_INVALID_ENUM:
errmsg = "GL_INVALID_ENUM";
break;
case GL_INVALID_VALUE:
errmsg = "GL_INVALID_VALUE";
break;
case GL_INVALID_OPERATION:
errmsg = "GL_INVALID_OPERATION";
break;
case GL_STACK_OVERFLOW:
errmsg = "GL_STACK_OVERFLOW";
break;
case GL_STACK_UNDERFLOW:
errmsg = "GL_STACK_UNDERFLOW";
break;
case GL_OUT_OF_MEMORY:
errmsg = "GL_OUT_OF_MEMORY";
break;
}
logger->log("Error: Image GL import failed: %s", errmsg.c_str());
return NULL;
}
return new Image(idPath, texture, width, height, realWidth, realHeight);
}
#endif
// Set color key and alpha blending optins, and convert the surface to the
// current display format
if (hasAlpha) {
image = SDL_DisplayFormatAlpha(tmpImage);
}
else {
image = SDL_DisplayFormat(tmpImage);
}
SDL_FreeSurface(tmpImage);
if (image == NULL) {
logger->log("Error: Image convert failed.");
return NULL;
}
return new Image(idPath, image);
}
void Image::unload()
{
mLoaded = false;
if (!mImage) return;
// Free the image surface.
SDL_FreeSurface(mImage);
mImage = NULL;
}
Image *Image::getSubImage(int x, int y, int width, int height)
{
// Create a new clipped sub-image
#ifdef USE_OPENGL
if (mUseOpenGL) {
return new SubImage(this, mGLImage, x, y, width, height,
mTexWidth, mTexHeight);
}
#endif
return new SubImage(this, mImage, x, y, width, height);
}
void Image::setAlpha(float a)
{
if (mAlpha == a) {
return;
}
mAlpha = a;
if (mImage) {
// Set the alpha value this image is drawn at
SDL_SetAlpha(mImage, SDL_SRCALPHA | SDL_RLEACCEL, (int)(255 * mAlpha));
}
}
float Image::getAlpha()
{
return mAlpha;
}
#ifdef USE_OPENGL
void Image::setLoadAsOpenGL(bool useOpenGL)
{
Image::mUseOpenGL = useOpenGL;
}
#endif
//============================================================================
// SubImage Class
//============================================================================
SubImage::SubImage(Image *parent, SDL_Surface *image,
int x, int y, int width, int height):
Image("", image), mParent(parent)
{
mParent->incRef();
// Set up the rectangle.
mBounds.x = x;
mBounds.y = y;
mBounds.w = width;
mBounds.h = height;
}
#ifdef USE_OPENGL
SubImage::SubImage(Image *parent, GLuint image,
int x, int y, int width, int height,
int texWidth, int texHeight):
Image("", image, width, height, texWidth, texHeight), mParent(parent)
{
mParent->incRef();
// Set up the rectangle.
mBounds.x = x;
mBounds.y = y;
mBounds.w = width;
mBounds.h = height;
}
#endif
SubImage::~SubImage()
{
mImage = 0; // Avoid destruction of the image
mParent->decRef();
}
Image *SubImage::getSubImage(int x, int y, int w, int h)
{
return NULL;
}
|