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
22 // =============================================================================
27 _QERFuncTable_1 g_FuncTable;
28 _QERFileSystemTable g_FileSystemTable;
30 // =============================================================================
35 class CSynapseClientImage : public CSynapseClient
39 bool RequestAPI( APIDescriptor_t *pAPI );
40 const char* GetInfo();
42 CSynapseClientImage() { }
43 virtual ~CSynapseClientImage() { }
46 CSynapseServer* g_pSynapseServer = NULL;
47 CSynapseClientImage g_SynapseClient;
50 #pragma GCC visibility push(default)
52 extern "C" CSynapseClient * SYNAPSE_DLL_EXPORT Synapse_EnumerateInterfaces( const char *version, CSynapseServer *pServer ) {
54 #pragma GCC visibility pop
56 if ( strcmp( version, SYNAPSE_VERSION ) ) {
57 Syn_Printf( "ERROR: synapse API version mismatch: should be '" SYNAPSE_VERSION "', got '%s'\n", version );
60 g_pSynapseServer = pServer;
61 g_pSynapseServer->IncRef();
62 Set_Syn_Printf( g_pSynapseServer->Get_Syn_Printf() );
64 g_SynapseClient.AddAPI( IMAGE_MAJOR, "png", sizeof( _QERPlugImageTable ) );
65 g_SynapseClient.AddAPI( RADIANT_MAJOR, NULL, sizeof( _QERFuncTable_1 ), SYN_REQUIRE, &g_FuncTable );
66 // NOTE: if imagepng starts being used for non "VFS" "pk3" config, need to add a dynamic config chunk
67 g_SynapseClient.AddAPI( VFS_MAJOR, "pk3", sizeof( _QERFileSystemTable ), SYN_REQUIRE, &g_FileSystemTable );
69 return &g_SynapseClient;
72 bool CSynapseClientImage::RequestAPI( APIDescriptor_t *pAPI ){
73 if ( !strcmp( pAPI->major_name, IMAGE_MAJOR ) ) {
74 _QERPlugImageTable* pTable = static_cast<_QERPlugImageTable*>( pAPI->mpTable );
75 if ( !strcmp( pAPI->minor_name, "png" ) ) {
76 pTable->m_pfnLoadImage = &LoadImage;
81 Syn_Printf( "ERROR: RequestAPI( '%s' ) not found in '%s'\n", pAPI->major_name, GetInfo() );
87 const char* CSynapseClientImage::GetInfo(){
88 return "PNG loader module built " __DATE__ " " RADIANT_VERSION;
93 // ====== PNG loader functionality ======
97 #ifdef __APPLE__ //tigital
101 void user_warning_fn( png_structp png_ptr, png_const_charp warning_msg ){
102 g_FuncTable.m_pfnSysPrintf( "libpng warning: %s\n", warning_msg );
105 void user_error_fn( png_structp png_ptr, png_const_charp error_msg ){
106 g_FuncTable.m_pfnSysPrintf( "libpng error: %s\n", error_msg );
107 longjmp( png_jmpbuf(png_ptr), 0 );
110 void user_read_data( png_structp png_ptr, png_bytep data, png_uint_32 length ){
111 png_bytep *p_p_fbuffer = (png_bytep*)png_get_io_ptr( png_ptr );
112 memcpy( data, *p_p_fbuffer, length );
113 *p_p_fbuffer += length;
116 void LoadImage( const char *filename, unsigned char **pic, int *width, int *height ){
117 png_byte** row_pointers;
118 unsigned char *fbuffer = NULL;
121 int nLen = g_FileSystemTable.m_pfnLoadFile( (char *)filename, (void **)&fbuffer, 0 );
129 // http://www.libpng.org/pub/png/libpng-manual.html
131 png_structp png_ptr = png_create_read_struct
132 ( PNG_LIBPNG_VER_STRING, NULL,
133 user_error_fn, user_warning_fn );
135 g_FuncTable.m_pfnSysPrintf( "libpng error: png_create_read_struct\n" );
139 png_infop info_ptr = png_create_info_struct( png_ptr );
141 png_destroy_read_struct( &png_ptr,
143 g_FuncTable.m_pfnSysPrintf( "libpng error: png_create_info_struct (info_ptr)\n" );
147 png_infop end_info = png_create_info_struct( png_ptr );
149 png_destroy_read_struct( &png_ptr, &info_ptr,
151 g_FuncTable.m_pfnSysPrintf( "libpng error: png_create_info_struct (end_info)\n" );
155 // configure the read function
156 png_set_read_fn( png_ptr, ( void * ) & p_fbuffer, ( png_rw_ptr ) & user_read_data );
158 if ( setjmp( png_jmpbuf(png_ptr) ) ) {
159 png_destroy_read_struct( &png_ptr, &info_ptr,
163 free( row_pointers );
168 png_read_info( png_ptr, info_ptr );
170 int bit_depth = png_get_bit_depth( png_ptr, info_ptr );
171 int color_type = png_get_color_type( png_ptr, info_ptr );
173 // we want to treat all images the same way
174 // The following code transforms grayscale images of less than 8 to 8 bits,
175 // changes paletted images to RGB, and adds a full alpha channel if there is
176 // transparency information in a tRNS chunk.
177 if ( color_type == PNG_COLOR_TYPE_PALETTE ) {
178 png_set_palette_to_rgb( png_ptr );
181 if ( color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8 ) {
182 png_set_expand_gray_1_2_4_to_8( png_ptr );
185 if ( png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS ) ) {
186 png_set_tRNS_to_alpha( png_ptr );
189 if ( !( color_type & PNG_COLOR_MASK_ALPHA ) ) {
190 // Set the background color to draw transparent and alpha images over.
191 png_color_16 my_background, *image_background;
193 if ( png_get_bKGD( png_ptr, info_ptr, &image_background ) ) {
194 png_set_background( png_ptr, image_background,
195 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0 );
198 png_set_background( png_ptr, &my_background,
199 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0 );
202 // Add alpha byte after each RGB triplet
203 png_set_filler( png_ptr, 0xff, PNG_FILLER_AFTER );
206 // read the sucker in one chunk
207 png_read_update_info( png_ptr, info_ptr );
209 color_type = png_get_color_type( png_ptr, info_ptr );
210 bit_depth = png_get_bit_depth( png_ptr, info_ptr );
212 *width = png_get_image_width( png_ptr, info_ptr );
213 *height = png_get_image_height( png_ptr, info_ptr );
215 // allocate the pixel buffer, and the row pointers
216 int size = ( *width ) * ( *height ) * 4;
217 // still have to use that g_malloc heresy
218 *pic = (unsigned char *)g_malloc( size );
219 row_pointers = (png_byte**) malloc( ( *height ) * sizeof( png_byte* ) );
222 for ( i = 0; i < ( *height ); i++ )
223 row_pointers[i] = (png_byte*)( *pic ) + i * 4 * ( *width );
226 png_read_image( png_ptr, row_pointers );
228 /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
229 png_read_end( png_ptr, info_ptr );
231 /* free up the memory structure */
232 png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
234 free( row_pointers );
235 g_FileSystemTable.m_pfnFreeFile( fbuffer );