1 /* -------------------------------------------------------------------------------
3 Copyright (C) 1999-2007 id Software, Inc. and contributors.
4 For a list of contributors, see the accompanying CONTRIBUTORS file.
6 This file is part of GtkRadiant.
8 GtkRadiant is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 GtkRadiant is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GtkRadiant; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 ----------------------------------------------------------------------------------
24 This code has been altered significantly from its original form, to support
25 several games based on the Quake III Arena engine, in the form of "Q3Map2."
27 ------------------------------------------------------------------------------- */
41 /* -------------------------------------------------------------------------------
43 this file contains image pool management with reference counting. note: it isn't
44 reentrant, so only call it from init/shutdown code or wrap calls in a mutex
46 ------------------------------------------------------------------------------- */
50 loads a dxtc (1, 3, 5) dds buffer into a valid rgba image
53 static void LoadDDSBuffer( byte *buffer, int size, byte **pixels, int *width, int *height ){
59 if ( buffer == NULL || size <= 0 || pixels == NULL || width == NULL || height == NULL ) {
69 if ( DDSGetInfo( (ddsBuffer_t*) buffer, &w, &h, &pf ) ) {
70 Sys_Printf( "WARNING: Invalid DDS texture\n" );
74 /* only certain types of dds textures are supported */
75 if ( pf != DDS_PF_ARGB8888 && pf != DDS_PF_DXT1 && pf != DDS_PF_DXT3 && pf != DDS_PF_DXT5 ) {
76 Sys_Printf( "WARNING: Only DDS texture formats ARGB8888, DXT1, DXT3, and DXT5 are supported (%d)\n", pf );
80 /* create image pixel buffer */
83 *pixels = safe_malloc( w * h * 4 );
85 /* decompress the dds texture */
86 DDSDecompress( (ddsBuffer_t*) buffer, *pixels );
93 callback function for libpng to read from a memory buffer
94 note: this function is a total hack, as it reads/writes the png struct directly!
97 typedef struct pngBuffer_s
104 void PNGReadData( png_struct *png, png_byte *buffer, png_size_t size ){
105 pngBuffer_t *pb = (pngBuffer_t*) png_get_io_ptr( png );
108 if ( ( pb->offset + size ) > pb->size ) {
109 size = ( pb->size - pb->offset );
111 memcpy( buffer, &pb->buffer[ pb->offset ], size );
113 //% Sys_Printf( "Copying %d bytes from 0x%08X to 0x%08X (offset: %d of %d)\n", size, &pb->buffer[ pb->offset ], buffer, pb->offset, pb->size );
120 loads a png file buffer into a valid rgba image
123 static void LoadPNGBuffer( byte *buffer, int size, byte **pixels, int *width, int *height ){
125 png_info *info, *end;
127 int i, bitDepth, colorType, channels;
133 if ( buffer == NULL || size <= 0 || pixels == NULL || width == NULL || height == NULL ) {
142 /* determine if this is a png file */
143 if ( png_sig_cmp( buffer, 0, 8 ) != 0 ) {
144 Sys_Printf( "WARNING: Invalid PNG file\n" );
148 /* create png structs */
149 png = png_create_read_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL );
151 Sys_Printf( "WARNING: Unable to create PNG read struct\n" );
155 info = png_create_info_struct( png );
156 if ( info == NULL ) {
157 Sys_Printf( "WARNING: Unable to create PNG info struct\n" );
158 png_destroy_read_struct( &png, NULL, NULL );
162 end = png_create_info_struct( png );
164 Sys_Printf( "WARNING: Unable to create PNG end info struct\n" );
165 png_destroy_read_struct( &png, &info, NULL );
169 /* set read callback */
173 png_set_read_fn( png, &pb, PNGReadData );
174 png->io_ptr = &pb; /* hack! */
176 /* set error longjmp */
177 if ( setjmp( png->jmpbuf ) ) {
178 Sys_Printf( "WARNING: An error occurred reading PNG image\n" );
179 png_destroy_read_struct( &png, &info, &end );
183 /* fixme: add proper i/o stuff here */
186 png_read_info( png, info );
188 /* read image header chunk */
189 png_get_IHDR( png, info,
190 &w, &h, &bitDepth, &colorType, NULL, NULL, NULL );
192 /* read number of channels */
193 channels = png_get_channels( png, info );
195 /* the following will probably bork on certain types of png images, but hey... */
197 /* force indexed/gray/trans chunk to rgb */
198 if ( ( colorType == PNG_COLOR_TYPE_PALETTE && bitDepth <= 8 ) ||
199 ( colorType == PNG_COLOR_TYPE_GRAY && bitDepth <= 8 ) ||
200 png_get_valid( png, info, PNG_INFO_tRNS ) ) {
201 png_set_expand( png );
204 /* strip 16bpc -> 8bpc */
205 if ( bitDepth == 16 ) {
206 png_set_strip_16( png );
209 /* pad rgb to rgba */
210 if ( bitDepth == 8 && colorType == PNG_COLOR_TYPE_RGB ) {
211 png_set_filler( png, 255, PNG_FILLER_AFTER );
214 /* create image pixel buffer */
217 *pixels = safe_malloc( w * h * 4 );
219 /* create row pointers */
220 rowPointers = safe_malloc( h * sizeof( byte* ) );
221 for ( i = 0; i < h; i++ )
222 rowPointers[ i ] = *pixels + ( i * w * 4 );
225 png_read_image( png, rowPointers );
229 png_destroy_read_struct( &png, &info, &end );
237 implicitly called by every function to set up image list
240 static void ImageInit( void ){
244 if ( numImages <= 0 ) {
245 /* clear images (fixme: this could theoretically leak) */
246 memset( images, 0, sizeof( images ) );
248 /* generate *bogus image */
249 images[ 0 ].name = safe_malloc( strlen( DEFAULT_IMAGE ) + 1 );
250 strcpy( images[ 0 ].name, DEFAULT_IMAGE );
251 images[ 0 ].filename = safe_malloc( strlen( DEFAULT_IMAGE ) + 1 );
252 strcpy( images[ 0 ].filename, DEFAULT_IMAGE );
253 images[ 0 ].width = 64;
254 images[ 0 ].height = 64;
255 images[ 0 ].refCount = 1;
256 images[ 0 ].pixels = safe_malloc( 64 * 64 * 4 );
257 for ( i = 0; i < ( 64 * 64 * 4 ); i++ )
258 images[ 0 ].pixels[ i ] = 255;
269 void ImageFree( image_t *image ){
271 if ( image == NULL ) {
275 /* decrement refcount */
279 if ( image->refCount <= 0 ) {
280 if ( image->name != NULL ) {
284 if ( image->filename != NULL ) {
285 free( image->filename );
287 image->filename = NULL;
288 free( image->pixels );
299 finds an existing rgba image and returns a pointer to the image_t struct or NULL if not found
302 image_t *ImageFind( const char *filename ){
311 if ( filename == NULL || filename[ 0 ] == '\0' ) {
315 /* strip file extension off name */
316 strcpy( name, filename );
317 StripExtension( name );
320 for ( i = 0; i < MAX_IMAGES; i++ )
322 if ( images[ i ].name != NULL && !strcmp( name, images[ i ].name ) ) {
327 /* no matching image found */
335 loads an rgba image and returns a pointer to the image_t struct or NULL if not found
338 image_t *ImageLoad( const char *filename ){
350 if ( filename == NULL || filename[ 0 ] == '\0' ) {
354 /* strip file extension off name */
355 strcpy( name, filename );
356 StripExtension( name );
358 /* try to find existing image */
359 image = ImageFind( name );
360 if ( image != NULL ) {
365 /* none found, so find first non-null image */
367 for ( i = 0; i < MAX_IMAGES; i++ )
369 if ( images[ i ].name == NULL ) {
370 image = &images[ i ];
375 /* too many images? */
376 if ( image == NULL ) {
377 Error( "MAX_IMAGES (%d) exceeded, there are too many image files referenced by the map.", MAX_IMAGES );
381 image->name = safe_malloc( strlen( name ) + 1 );
382 strcpy( image->name, name );
384 /* attempt to load tga */
385 StripExtension( name );
386 strcat( name, ".tga" );
387 size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
389 LoadTGABuffer( buffer, buffer + size, &image->pixels, &image->width, &image->height );
393 /* attempt to load png */
394 StripExtension( name );
395 strcat( name, ".png" );
396 size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
398 LoadPNGBuffer( buffer, size, &image->pixels, &image->width, &image->height );
402 /* attempt to load jpg */
403 StripExtension( name );
404 strcat( name, ".jpg" );
405 size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
407 if ( LoadJPGBuff( buffer, size, &image->pixels, &image->width, &image->height ) == -1 && image->pixels != NULL ) {
408 Sys_Printf( "WARNING: LoadJPGBuff: %s\n", (unsigned char*) image->pixels );
413 /* attempt to load dds */
414 StripExtension( name );
415 strcat( name, ".dds" );
416 size = vfsLoadFile( (const char*) name, (void**) &buffer, 0 );
418 LoadDDSBuffer( buffer, size, &image->pixels, &image->width, &image->height );
424 DDSGetInfo( (ddsBuffer_t*) buffer, NULL, NULL, &pf );
425 Sys_Printf( "pf = %d\n", pf );
426 if ( image->width > 0 ) {
427 StripExtension( name );
428 strcat( name, "_converted.tga" );
429 WriteTGA( "C:\\games\\quake3\\baseq3\\textures\\rad\\dds_converted.tga", image->pixels, image->width, image->height );
438 /* free file buffer */
441 /* make sure everything's kosher */
442 if ( size <= 0 || image->width <= 0 || image->height <= 0 || image->pixels == NULL ) {
443 //% Sys_Printf( "size = %d width = %d height = %d pixels = 0x%08x (%s)\n",
444 //% size, image->width, image->height, image->pixels, name );
451 image->filename = safe_malloc( strlen( name ) + 1 );
452 strcpy( image->filename, name );
458 /* return the image */