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))
58 Syn_Printf("ERROR: synapse API version mismatch: should be '" SYNAPSE_VERSION "', got '%s'\n", version);
61 g_pSynapseServer = pServer;
62 g_pSynapseServer->IncRef();
63 Set_Syn_Printf(g_pSynapseServer->Get_Syn_Printf());
65 g_SynapseClient.AddAPI(IMAGE_MAJOR, "png", sizeof(_QERPlugImageTable));
66 g_SynapseClient.AddAPI(RADIANT_MAJOR, NULL, sizeof(_QERFuncTable_1), SYN_REQUIRE, &g_FuncTable);
67 // NOTE: if imagepng starts being used for non "VFS" "pk3" config, need to add a dynamic config chunk
68 g_SynapseClient.AddAPI(VFS_MAJOR, "pk3", sizeof(_QERFileSystemTable), SYN_REQUIRE, &g_FileSystemTable);
70 return &g_SynapseClient;
73 bool CSynapseClientImage::RequestAPI(APIDescriptor_t *pAPI)
75 if (!strcmp(pAPI->major_name, IMAGE_MAJOR))
77 _QERPlugImageTable* pTable= static_cast<_QERPlugImageTable*>(pAPI->mpTable);
78 if (!strcmp(pAPI->minor_name, "png"))
80 pTable->m_pfnLoadImage = &LoadImage;
85 Syn_Printf("ERROR: RequestAPI( '%s' ) not found in '%s'\n", pAPI->major_name, GetInfo());
91 const char* CSynapseClientImage::GetInfo()
93 return "PNG loader module built " __DATE__ " " RADIANT_VERSION;
98 // ====== PNG loader functionality ======
102 #ifdef __APPLE__ //tigital
106 void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg)
108 g_FuncTable.m_pfnSysPrintf ("libpng warning: %s\n", warning_msg);
111 void user_error_fn(png_structp png_ptr, png_const_charp error_msg)
113 g_FuncTable.m_pfnSysPrintf ("libpng error: %s\n", error_msg);
114 longjmp(png_ptr->jmpbuf, 0);
117 void user_read_data(png_structp png_ptr, png_bytep data, png_uint_32 length)
119 png_bytep *p_p_fbuffer = (png_bytep*)png_get_io_ptr(png_ptr);
120 memcpy(data, *p_p_fbuffer, length);
121 *p_p_fbuffer += length;
124 void LoadImage (const char *filename, unsigned char **pic, int *width, int *height)
126 png_byte** row_pointers;
127 unsigned char *fbuffer = NULL;
130 int nLen = g_FileSystemTable.m_pfnLoadFile( (char *)filename, (void **)&fbuffer, 0 );
137 // http://www.libpng.org/pub/png/libpng-manual.html
139 png_structp png_ptr = png_create_read_struct
140 (PNG_LIBPNG_VER_STRING, NULL,
141 user_error_fn, user_warning_fn);
144 g_FuncTable.m_pfnSysPrintf ("libpng error: png_create_read_struct\n");
148 png_infop info_ptr = png_create_info_struct(png_ptr);
150 png_destroy_read_struct(&png_ptr,
152 g_FuncTable.m_pfnSysPrintf ("libpng error: png_create_info_struct (info_ptr)\n");
156 png_infop end_info = png_create_info_struct(png_ptr);
158 png_destroy_read_struct(&png_ptr, &info_ptr,
160 g_FuncTable.m_pfnSysPrintf ("libpng error: png_create_info_struct (end_info)\n");
164 // configure the read function
165 png_set_read_fn(png_ptr, (voidp)&p_fbuffer, (png_rw_ptr)&user_read_data);
167 if (setjmp(png_ptr->jmpbuf)) {
168 png_destroy_read_struct(&png_ptr, &info_ptr,
178 png_read_info(png_ptr, info_ptr);
180 int bit_depth = png_get_bit_depth(png_ptr, info_ptr);
181 int color_type = png_get_color_type(png_ptr, info_ptr);
183 // we want to treat all images the same way
184 // The following code transforms grayscale images of less than 8 to 8 bits,
185 // changes paletted images to RGB, and adds a full alpha channel if there is
186 // transparency information in a tRNS chunk.
187 if (color_type == PNG_COLOR_TYPE_PALETTE)
188 png_set_palette_to_rgb(png_ptr);
190 if ( color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8 ) {
191 // png_set_gray_1_2_4_to_8 was renamed to png_set_expand_gray_1_2_4_to_8
192 png_set_expand_gray_1_2_4_to_8(png_ptr);
195 if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
196 png_set_tRNS_to_alpha(png_ptr);
198 if ( ! ( color_type & PNG_COLOR_MASK_ALPHA ) ) {
199 // Set the background color to draw transparent and alpha images over.
200 png_color_16 my_background, *image_background;
202 if (png_get_bKGD(png_ptr, info_ptr, &image_background))
203 png_set_background(png_ptr, image_background,
204 PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
206 png_set_background(png_ptr, &my_background,
207 PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
209 // Add alpha byte after each RGB triplet
210 png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
213 // read the sucker in one chunk
214 png_read_update_info(png_ptr, info_ptr);
216 color_type = png_get_color_type(png_ptr, info_ptr);
217 bit_depth = png_get_bit_depth(png_ptr, info_ptr);
219 *width = png_get_image_width(png_ptr, info_ptr);
220 *height = png_get_image_height(png_ptr, info_ptr);
222 // allocate the pixel buffer, and the row pointers
223 int size = (*width)*(*height)*4;
224 // still have to use that g_malloc heresy
225 *pic = (unsigned char *)g_malloc(size);
226 row_pointers = (png_byte**) malloc((*height) * sizeof(png_byte*));
229 for(i = 0; i < (*height); i++)
230 row_pointers[i] = (png_byte*)(*pic) + i * 4 * (*width);
233 png_read_image(png_ptr, row_pointers);
235 /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
236 png_read_end(png_ptr, info_ptr);
238 /* free up the memory structure */
239 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
242 g_FileSystemTable.m_pfnFreeFile (fbuffer);