2 Copyright (C) 1999-2007 id Software, Inc. and contributors.
3 For a list of contributors, see the accompanying CONTRIBUTORS file.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 static void BMPLineNone(FILE *f, char *sline, int pixbytes, int width)
36 nbytes = (width + 3) / 4;
39 fread(sline, width, 1, f);
42 while (nbytes-- > 0) fgetc(f);
46 nbytes = ((width * 3) + 3) / 4;
49 fread(sline, width, 3, f);
52 while (nbytes-- > 0) fgetc(f);
55 for (i = 0, j = 0; i < width; i++, j += 3)
58 sline[j] = sline[j+2];
65 Error("BMPLineNone failed.");
69 static void BMPLineRLE8(FILE *f, char *sline, int pixbytes, int width)
71 Error("RLE8 not yet supported.");
75 static void BMPLineRLE4(FILE *f, char *sline, int pixbytes, int width)
77 Error("RLE4 not yet supported.");
81 static void BMPLine(FILE *f, char *scanline, int pixbytes, int width, int rle)
85 case xBI_NONE : BMPLineNone(f, scanline, pixbytes, width); return;
86 case xBI_RLE8 : BMPLineRLE8(f, scanline, pixbytes, width); return;
87 case xBI_RLE4 : BMPLineRLE4(f, scanline, pixbytes, width); return;
90 Error("Unknown compression type.");
95 static void PrintHeader(binfo_t *b)
97 printf("biSize : %ld\n", b->biSize);
98 printf("biWidth : %ld\n", b->biWidth);
99 printf("biHeight : %ld\n", b->biHeight);
100 printf("biPlanes : %d\n", b->biPlanes);
101 printf("biBitCount : %d\n", b->biBitCount);
102 printf("biCompression : %ld\n", b->biCompression);
103 printf("biSizeImage : %ld\n", b->biSizeImage);
104 printf("biXPelsPerMeter: %ld\n", b->biXPelsPerMeter);
105 printf("biYPelsPerMeter: %ld\n", b->biYPelsPerMeter);
106 printf("biClrUsed : %ld\n", b->biClrUsed);
107 printf("biClrImportant : %ld\n", b->biClrImportant);
111 // FIXME: calls to Error(const char *, ... ) are dependant on qe3.cpp
112 void LoadBMP(char *filename, bitmap_t *bit)
118 int rowbytes, i, pixbytes;
122 if ((f = fopen(filename, "rb")) == NULL)
124 Error("Unable to open file");// %s.", filename);
127 // read in bitmap header
128 if (fread(&bhd, sizeof(bhd), 1, f) != 1)
131 Error("Unable to read in bitmap header.");
134 // make sure we have a valid bitmap file
135 if (bhd.bfType != BMP_SIGNATURE_WORD)
138 Error("Invalid BMP file");//: %s", filename);
141 // load in info header
142 if (fread(&info, sizeof(info), 1, f) != 1)
145 Error("Unable to read bitmap info header.");
148 // make sure this is an info type of bitmap
149 if (info.biSize != sizeof(binfo_t))
152 Error("We only support the info bitmap type.");
155 // PrintHeader(&info);
157 bit->bpp = info.biBitCount;
158 bit->width = info.biWidth;
159 bit->height = info.biHeight;
163 //currently we only read in 8 and 24 bit bmp files
164 if (info.biBitCount == 8) pixbytes = 1;
165 else if (info.biBitCount == 24) pixbytes = 3;
168 Error("Only 8BPP and 24BPP supported");
169 //Error("BPP %d not supported.", info.biBitCount);
172 // if this is an eight bit image load palette
177 bit->palette = reinterpret_cast<rgb_t*>(g_malloc(sizeof(rgb_t) * 256));
179 for (i = 0; i < 256; i++)
181 if (fread(&q, sizeof(drgb_t), 1, f) != 1)
183 fclose(f); g_free(bit->palette);
184 Error("Unable to read palette.");
187 bit->palette[i].r = q.red;
188 bit->palette[i].g = q.green;
189 bit->palette[i].b = q.blue;
193 // position to start of bitmap
194 fseek(f, bhd.bfOffBits, SEEK_SET);
196 // create scanline to read data into
197 rowbytes = ((info.biWidth * pixbytes) + 3) / 4;
200 scanline = reinterpret_cast<char*>(g_malloc(rowbytes));
202 // alloc space for new bitmap
203 bit->data = reinterpret_cast<unsigned char*>(g_malloc(info.biWidth * pixbytes * info.biHeight));
206 for (i = 0; i < info.biHeight; i++)
208 BMPLine(f, scanline, pixbytes, info.biWidth, info.biCompression);
211 memcpy(&bit->data[info.biWidth * pixbytes * (info.biHeight - i - 1)], scanline, info.biWidth * pixbytes);
220 static void BMPEncodeLine(FILE *f, unsigned char *data, int npxls, int pixbytes)
227 nbytes = (npxls + 3) / 4;
230 fwrite(data, npxls, 1, f);
233 while (nbytes-- > 0) fputc(0, f);
237 // reorder rgb to bgr
238 for (i = 0, j = 0; i < npxls; i++, j+= 3)
241 data[j] = data[j + 2];
245 nbytes = ((npxls * 3) + 3) / 4;
248 fwrite(data, npxls, 3, f);
251 while (nbytes-- > 0) fputc(0, f);
255 Error("BMPEncodeLine Failed.");
260 void WriteBMP(char *filename, bitmap_t *bit)
265 drgb_t q; // palette that gets written
270 if (bit->bpp == 8) pixbytes = 1;
271 else if (bit->bpp == 24) pixbytes = 3;
275 Error("Only 8BPP and 24BPP supported");
276 //Error("BPP %d not supported.", bit->bpp);
280 if ((f = fopen(filename, "wb")) == NULL)
282 Error("Unable to open file");//%s.", filename);
285 // write out an empty header as a place holder
286 if (fwrite(&header, sizeof(header), 1, f) != 1)
288 Error("Unable to fwrite.");
291 // init and write info header
292 info.biSize = sizeof(binfo_t);
293 info.biWidth = bit->width;
294 info.biHeight = bit->height;
296 info.biBitCount = bit->bpp;
297 info.biCompression = xBI_NONE;
298 info.biSizeImage = bit->width * bit->height;
299 info.biXPelsPerMeter = 0;
300 info.biYPelsPerMeter = 0;
301 info.biClrUsed = 256;
302 info.biClrImportant = 256;
304 if (fwrite(&info, sizeof(binfo_t), 1, f) != 1)
306 Error("fwrite failed.");
309 // write out palette if we need to
312 for (i = 0; i < 256; i++)
314 q.red = bit->palette[i].r;
315 q.green = bit->palette[i].g;
316 q.blue = bit->palette[i].b;
318 fwrite(&q, sizeof(q), 1, f);
322 // save offset to start of bitmap
329 for (i = h - 1; i >= 0; i--)
331 BMPEncodeLine(f, &bit->data[w * pixbytes * i], w, pixbytes);
334 // update and rewrite file header
335 header.bfType = BMP_SIGNATURE_WORD;
336 header.bfSize = ftell(f);
337 header.bfOffBits = bmofs;
339 fseek(f, 0L, SEEK_SET);
340 fwrite(&header, sizeof(header), 1, f);
346 void NewBMP(int width, int height, int bpp, bitmap_t *bit)
350 if (bpp == 8) pixbytes = 1;
351 else if (bpp == 24) pixbytes = 3;
355 Error("NewBMP: 8 or 24 bit only.");
360 bit->height = height;
362 bit->data = reinterpret_cast<unsigned char*>(g_malloc(width * height * pixbytes));
364 if (bit->data == NULL)
366 Error("NewBMP: g_malloc failed.");
369 // see if we need to create a palette
372 bit->palette = (rgb_t *) g_malloc(768);
374 if (bit->palette == NULL)
376 Error("NewBMP: unable to g_malloc palette.");
387 void FreeBMP(bitmap_t *bitmap)
391 g_free(bitmap->palette);
392 bitmap->palette = NULL;
397 g_free(bitmap->data);